{
 "instance": {
  "nmfc-20230331.htm": {
   "axisCustom": 2,
   "axisStandard": 34,
   "baseTaxonomies": {
    "http://fasb.org/us-gaap-sup/2022q3": 1072,
    "http://fasb.org/us-gaap/2022": 6608,
    "http://xbrl.sec.gov/cef/2022": 2,
    "http://xbrl.sec.gov/dei/2022": 29
   },
   "contextCount": 2119,
   "dts": {
    "calculationLink": {
     "local": [
      "nmfc-20230331_cal.xml"
     ]
    },
    "definitionLink": {
     "local": [
      "nmfc-20230331_def.xml"
     ]
    },
    "inline": {
     "local": [
      "nmfc-20230331.htm"
     ]
    },
    "labelLink": {
     "local": [
      "nmfc-20230331_lab.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "nmfc-20230331_pre.xml"
     ]
    },
    "schema": {
     "local": [
      "nmfc-20230331.xsd"
     ],
     "remote": [
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/2006/ref-2006-02-27.xsd",
      "http://www.xbrl.org/2006/xbrldi-2006.xsd",
      "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd",
      "https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd",
      "https://www.xbrl.org/dtr/type/2020-01-21/types.xsd",
      "https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd",
      "https://xbrl.fasb.org/srt/2022/elts/srt-roles-2022.xsd",
      "https://xbrl.fasb.org/srt/2022/elts/srt-types-2022.xsd",
      "https://xbrl.fasb.org/srt/2022q3/srt-sup-2022q3.xsd",
      "https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd",
      "https://xbrl.fasb.org/us-gaap/2022/elts/us-roles-2022.xsd",
      "https://xbrl.fasb.org/us-gaap/2022/elts/us-types-2022.xsd",
      "https://xbrl.fasb.org/us-gaap/2022q3/us-gaap-sup-2022q3.xsd",
      "https://xbrl.sec.gov/cef/2022/cef-2022.xsd",
      "https://xbrl.sec.gov/country/2022/country-2022.xsd",
      "https://xbrl.sec.gov/dei/2022/dei-2022.xsd",
      "https://xbrl.sec.gov/dei/2022/dei-2022_lab.xsd"
     ]
    }
   },
   "elementCount": 895,
   "entityCount": 1,
   "hidden": {
    "http://xbrl.sec.gov/dei/2022": 5,
    "total": 5
   },
   "keyCustom": 63,
   "keyStandard": 264,
   "memberCustom": 198,
   "memberStandard": 51,
   "nsprefix": "nmfc",
   "nsuri": "http://www.newmountainfinance.com/20230331",
   "report": {
    "R1": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "document",
     "isDefault": "true",
     "longName": "0000001 - Document - Cover",
     "menuCat": "Cover",
     "order": "1",
     "role": "http://www.newmountainfinance.com/role/Cover",
     "shortName": "Cover",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "lang": "en-US",
      "name": "dei:DocumentQuarterlyReport",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R10": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "0000010 - Disclosure - Summary of Significant Accounting Policies",
     "menuCat": "Notes",
     "order": "10",
     "role": "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPolicies",
     "shortName": "Summary of Significant Accounting Policies",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R11": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentHoldingsScheduleOfInvestmentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "0000011 - Disclosure - Investments",
     "menuCat": "Notes",
     "order": "11",
     "role": "http://www.newmountainfinance.com/role/Investments",
     "shortName": "Investments",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentHoldingsScheduleOfInvestmentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R12": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:FairValueMeasurementPolicyPolicyTextBlock",
       "span",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "0000012 - Disclosure - Fair Value",
     "menuCat": "Notes",
     "order": "12",
     "role": "http://www.newmountainfinance.com/role/FairValue",
     "shortName": "Fair Value",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:FairValueMeasurementPolicyPolicyTextBlock",
       "span",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R13": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RelatedPartyTransactionsDisclosureTextBlock",
      "reportCount": 1,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "0000013 - Disclosure - Agreements",
     "menuCat": "Notes",
     "order": "13",
     "role": "http://www.newmountainfinance.com/role/Agreements",
     "shortName": "Agreements",
     "subGroupType": "",
     "uniqueAnchor": null
    },
    "R14": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RelatedPartyTransactionsDisclosureTextBlock",
      "reportCount": 1,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "0000014 - Disclosure - Related Parties",
     "menuCat": "Notes",
     "order": "14",
     "role": "http://www.newmountainfinance.com/role/RelatedParties",
     "shortName": "Related Parties",
     "subGroupType": "",
     "uniqueAnchor": null
    },
    "R15": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LongTermDebtTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "0000015 - Disclosure - Borrowings",
     "menuCat": "Notes",
     "order": "15",
     "role": "http://www.newmountainfinance.com/role/Borrowings",
     "shortName": "Borrowings",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LongTermDebtTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R16": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "nmfc:RegulatoryCapitalRequirementsForInvestmentCompaniesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "0000016 - Disclosure - Regulation",
     "menuCat": "Notes",
     "order": "16",
     "role": "http://www.newmountainfinance.com/role/Regulation",
     "shortName": "Regulation",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "nmfc:RegulatoryCapitalRequirementsForInvestmentCompaniesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R17": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "0000017 - Disclosure - Commitments and Contingencies",
     "menuCat": "Notes",
     "order": "17",
     "role": "http://www.newmountainfinance.com/role/CommitmentsandContingencies",
     "shortName": "Commitments and Contingencies",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R18": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "nmfc:InvestmentCompanyNetAssetsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "0000018 - Disclosure - Net Assets",
     "menuCat": "Notes",
     "order": "18",
     "role": "http://www.newmountainfinance.com/role/NetAssets",
     "shortName": "Net Assets",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "nmfc:InvestmentCompanyNetAssetsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R19": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EarningsPerShareTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "0000019 - Disclosure - Earnings Per Share",
     "menuCat": "Notes",
     "order": "19",
     "role": "http://www.newmountainfinance.com/role/EarningsPerShare",
     "shortName": "Earnings Per Share",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EarningsPerShareTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R2": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentOwnedAtFairValue",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "0000002 - Statement - Consolidated Statements of Assets and Liabilities",
     "menuCat": "Statements",
     "order": "2",
     "role": "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
     "shortName": "Consolidated Statements of Assets and Liabilities",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R20": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentCompanyFinancialHighlightsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "0000020 - Disclosure - Financial Highlights",
     "menuCat": "Notes",
     "order": "20",
     "role": "http://www.newmountainfinance.com/role/FinancialHighlights",
     "shortName": "Financial Highlights",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentCompanyFinancialHighlightsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R21": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "0000021 - Disclosure - Recent Accounting Standards Updates",
     "menuCat": "Notes",
     "order": "21",
     "role": "http://www.newmountainfinance.com/role/RecentAccountingStandardsUpdates",
     "shortName": "Recent Accounting Standards Updates",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R22": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SubsequentEventsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "0000022 - Disclosure - Subsequent Events",
     "menuCat": "Notes",
     "order": "22",
     "role": "http://www.newmountainfinance.com/role/SubsequentEvents",
     "shortName": "Subsequent Events",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SubsequentEventsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R23": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:EntityFileNumber",
      "reportCount": 1,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "995470 - Disclosure - N-2",
     "menuCat": "Notes",
     "order": "23",
     "role": "http://xbrl.sec.gov/cef/role/N2",
     "shortName": "N-2",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "lang": "en-US",
      "name": "cef:InvestmentObjectivesAndPracticesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R24": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BasisOfAccountingPolicyPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954701 - Disclosure - Summary of Significant Accounting Policies (Policies)",
     "menuCat": "Policies",
     "order": "24",
     "role": "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies",
     "shortName": "Summary of Significant Accounting Policies (Policies)",
     "subGroupType": "policies",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BasisOfAccountingPolicyPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R25": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954702 - Disclosure - Summary of Significant Accounting Policies (Tables)",
     "menuCat": "Tables",
     "order": "25",
     "role": "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesTables",
     "shortName": "Summary of Significant Accounting Policies (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R26": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentHoldingsScheduleOfInvestmentsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954703 - Disclosure - Investments (Tables)",
     "menuCat": "Tables",
     "order": "26",
     "role": "http://www.newmountainfinance.com/role/InvestmentsTables",
     "shortName": "Investments (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentHoldingsScheduleOfInvestmentsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R27": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueAssetsMeasuredOnRecurringBasisTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954704 - Disclosure - Fair Value (Tables)",
     "menuCat": "Tables",
     "order": "27",
     "role": "http://www.newmountainfinance.com/role/FairValueTables",
     "shortName": "Fair Value (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueAssetsMeasuredOnRecurringBasisTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R28": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfRelatedPartyTransactionsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954705 - Disclosure - Agreements (Tables)",
     "menuCat": "Tables",
     "order": "28",
     "role": "http://www.newmountainfinance.com/role/AgreementsTables",
     "shortName": "Agreements (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfRelatedPartyTransactionsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R29": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDebtInstrumentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954706 - Disclosure - Borrowings (Tables)",
     "menuCat": "Tables",
     "order": "29",
     "role": "http://www.newmountainfinance.com/role/BorrowingsTables",
     "shortName": "Borrowings (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDebtInstrumentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R3": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentOwnedAtCost",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "0000003 - Statement - Consolidated Statements of Assets and Liabilities (Parenthetical)",
     "menuCat": "Statements",
     "order": "3",
     "role": "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical",
     "shortName": "Consolidated Statements of Assets and Liabilities (Parenthetical)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "INF",
      "lang": "en-US",
      "name": "us-gaap:PreferredStockParOrStatedValuePerShare",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     }
    },
    "R30": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap-supplement:InvestmentCompanyChangesInNetAssetsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954707 - Disclosure - Net Assets (Tables)",
     "menuCat": "Tables",
     "order": "30",
     "role": "http://www.newmountainfinance.com/role/NetAssetsTables",
     "shortName": "Net Assets (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap-supplement:InvestmentCompanyChangesInNetAssetsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R31": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954708 - Disclosure - Earnings Per Share (Tables)",
     "menuCat": "Tables",
     "order": "31",
     "role": "http://www.newmountainfinance.com/role/EarningsPerShareTables",
     "shortName": "Earnings Per Share (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R32": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentCompanyFinancialHighlightsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954709 - Disclosure - Financial Highlights (Tables)",
     "menuCat": "Tables",
     "order": "32",
     "role": "http://www.newmountainfinance.com/role/FinancialHighlightsTables",
     "shortName": "Financial Highlights (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentCompanyFinancialHighlightsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R33": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ProceedsFromIssuanceOfCommonStock",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954710 - Disclosure - Formation and Business Purpose (Details)",
     "menuCat": "Details",
     "order": "33",
     "role": "http://www.newmountainfinance.com/role/FormationandBusinessPurposeDetails",
     "shortName": "Formation and Business Purpose (Details)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R34": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "link:footnote",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "nmfc:NumberOfCollateralizedAgreements",
      "reportCount": 1,
      "unitRef": "agreement",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954711 - Disclosure - Summary of Significant Accounting Policies - Narrative (Details)",
     "menuCat": "Details",
     "order": "34",
     "role": "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails",
     "shortName": "Summary of Significant Accounting Policies - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:CashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R35": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:PropertyPlantAndEquipmentTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i4a29878f0d48412b94e2d7dd42f4e2f2_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentFairValueDisclosure",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954712 - Disclosure - Summary of Significant Accounting Policies - Summary of Properties (Details)",
     "menuCat": "Details",
     "order": "35",
     "role": "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesSummaryofPropertiesDetails",
     "shortName": "Summary of Significant Accounting Policies - Summary of Properties (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:PropertyPlantAndEquipmentTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i4a29878f0d48412b94e2d7dd42f4e2f2_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentFairValueDisclosure",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R36": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentOwnedAtCost",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954713 - Disclosure - Investments - Investment Cost and Fair Value by Type and by Industry (Details)",
     "menuCat": "Details",
     "order": "36",
     "role": "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails",
     "shortName": "Investments - Investment Cost and Fair Value by Type and by Industry (Details)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R37": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentOwnedAtCost",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954714 - Disclosure - Investments - Narrative (Details)",
     "menuCat": "Details",
     "order": "37",
     "role": "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
     "shortName": "Investments - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ie9cce711746042dbb34c185ed88da11a_I20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:InvestmentOwnedAtCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R38": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i41d71bc9f6f2457bb2bf6d0978c11ae8_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentOwnedBalancePrincipalAmount",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954715 - Disclosure - Investments - Portfolio Summary for SLP III and SLP IV (Details)",
     "menuCat": "Details",
     "order": "38",
     "role": "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails",
     "shortName": "Investments - Portfolio Summary for SLP III and SLP IV (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap-supplement:InvestmentCompanyNonconsolidatedSubsidiarySummarizedFinancialInformationTableTextBlock",
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i92f76be3187e422aac65cf110c76c620_I20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:InvestmentOwnedBalancePrincipalAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R39": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentOwnedAtCost",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954716 - Disclosure - Investments - Individual Investments in the Portfolios of SLP III and SLP IV (Details)",
     "menuCat": "Details",
     "order": "39",
     "role": "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails",
     "shortName": "Investments - Individual Investments in the Portfolios of SLP III and SLP IV (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i52aa877fb3d74bb59a902f01106a7e02_I20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:InvestmentOwnedBalancePrincipalAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R4": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:RevenueRecognitionPolicyTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap-supplement:InterestIncomeOperatingPaidInKind",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "0000004 - Statement - Consolidated Statements of Operations",
     "menuCat": "Statements",
     "order": "4",
     "role": "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
     "shortName": "Consolidated Statements of Operations",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:AdministrativeFeesExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R40": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentOwnedAtCost",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954717 - Disclosure - Investments - Selected Balance Sheet Information for SLP III and SLP IV (Details)",
     "menuCat": "Details",
     "order": "40",
     "role": "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails",
     "shortName": "Investments - Selected Balance Sheet Information for SLP III and SLP IV (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "icfc7058da7734cc2872cd7da2ed5c044_I20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "nmfc:CashAndOtherAssets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R41": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:GrossInvestmentIncomeOperating",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954718 - Disclosure - Investments - Selected Statement of Operations Information for SLP III and SLP IV (Details)",
     "menuCat": "Details",
     "order": "41",
     "role": "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails",
     "shortName": "Investments - Selected Statement of Operations Information for SLP III and SLP IV (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "iae7c4524a11e4006afbde9d9184c2be9_D20230101-20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:InterestIncomeOperating",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R42": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:FairValueAssetsMeasuredOnRecurringBasisTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentsFairValueDisclosure",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954719 - Disclosure - Fair Value - Fair Value Levels (Details)",
     "menuCat": "Details",
     "order": "42",
     "role": "http://www.newmountainfinance.com/role/FairValueFairValueLevelsDetails",
     "shortName": "Fair Value - Fair Value Levels (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:FairValueAssetsMeasuredOnRecurringBasisTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentsFairValueDisclosure",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R43": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i48c58e00714d495daba4d93b7978b5a8_I20221231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954720 - Disclosure - Fair Value - Level III Rollforward (Details)",
     "menuCat": "Details",
     "order": "43",
     "role": "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails",
     "shortName": "Fair Value - Level III Rollforward (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i48c58e00714d495daba4d93b7978b5a8_I20221231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R44": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentOwnedAtFairValue",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954721 - Disclosure - Fair Value - Unobservable Inputs (Details)",
     "menuCat": "Details",
     "order": "44",
     "role": "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails",
     "shortName": "Fair Value - Unobservable Inputs (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "idd4d70c6077445928abe33227da4e396_I20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:InvestmentOwnedAtFairValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R45": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i4f3ee5fc51de4f7bbe2e965609e0a86b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LongTermDebtFairValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954722 - Disclosure - Fair Value - Principal Amounts and Fair Values of Borrowings (Details)",
     "menuCat": "Details",
     "order": "45",
     "role": "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
     "shortName": "Fair Value - Principal Amounts and Fair Values of Borrowings (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i4f3ee5fc51de4f7bbe2e965609e0a86b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LongTermDebtFairValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R46": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfRelatedPartyTransactionsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "nmfc:InvestmentCompanyContractualFeeWaivedManagementFee",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954723 - Disclosure - Agreements - Narrative (Details)",
     "menuCat": "Details",
     "order": "46",
     "role": "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails",
     "shortName": "Agreements - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:PreferredStockSharesIssued",
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "INF",
      "lang": "en-US",
      "name": "us-gaap:PreferredStockSharesOutstanding",
      "reportCount": 1,
      "unique": true,
      "unitRef": "shares",
      "xsiNil": "false"
     }
    },
    "R47": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ManagementFeeExpense",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954724 - Disclosure - Agreements - Management Fees and Incentive Fees (Details)",
     "menuCat": "Details",
     "order": "47",
     "role": "http://www.newmountainfinance.com/role/AgreementsManagementFeesandIncentiveFeesDetails",
     "shortName": "Agreements - Management Fees and Incentive Fees (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfRelatedPartyTransactionsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "nmfc:InvestmentCompanyManagementFeeExpenseAfterReductionOfFeeWaiver",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R48": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ib36691f2e77d47e6b45a4e53c22c356f_I20200330",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954725 - Disclosure - Related Parties (Details)",
     "menuCat": "Details",
     "order": "48",
     "role": "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
     "shortName": "Related Parties (Details)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R49": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i86882a62ebb049e592752bad22ab014f_I20180609",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "nmfc:AssetCoverageRequiredRatioMinimum",
      "reportCount": 1,
      "unitRef": "number",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954726 - Disclosure - Borrowings - General, Narrative (Details)",
     "menuCat": "Details",
     "order": "49",
     "role": "http://www.newmountainfinance.com/role/BorrowingsGeneralNarrativeDetails",
     "shortName": "Borrowings - General, Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i86882a62ebb049e592752bad22ab014f_I20180609",
      "decimals": "INF",
      "lang": "en-US",
      "name": "nmfc:DebtOutstandingAllowablePerDollarOfEquity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R5": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap-supplement:InvestmentIncomeOperatingAfterExpenseAndTax",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "0000005 - Statement - Consolidated Statements of Changes in Net Assets",
     "menuCat": "Statements",
     "order": "5",
     "role": "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets",
     "shortName": "Consolidated Statements of Changes in Net Assets",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "INF",
      "lang": "en-US",
      "name": "us-gaap:StockIssuedDuringPeriodSharesNewIssues",
      "reportCount": 1,
      "unique": true,
      "unitRef": "shares",
      "xsiNil": "false"
     }
    },
    "R50": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i86882a62ebb049e592752bad22ab014f_I20180609",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "nmfc:AssetCoverageRequiredRatioMinimum",
      "reportCount": 1,
      "unitRef": "number",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954727 - Disclosure - Borrowings - Holdings Credit Facility (Details)",
     "menuCat": "Details",
     "order": "50",
     "role": "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
     "shortName": "Borrowings - Holdings Credit Facility (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i98d515336bf94ed49659827355f23ed8_I20210420",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R51": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AmortizationOfFinancingCosts",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954728 - Disclosure - Borrowings - NMFC Credit Facility (Details)",
     "menuCat": "Details",
     "order": "51",
     "role": "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
     "shortName": "Borrowings - NMFC Credit Facility (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i2a5b3c61c4a94d0ab36fd2e76cb79264_I20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R52": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DueToAffiliateCurrentAndNoncurrent",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954729 - Disclosure - Borrowings - Unsecured Management Company Revolver (Details)",
     "menuCat": "Details",
     "order": "52",
     "role": "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
     "shortName": "Borrowings - Unsecured Management Company Revolver (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "icb4a93fbef40439ca12b61c83ead0bfd_I20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:DueToAffiliateCurrentAndNoncurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R53": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AmortizationOfFinancingCosts",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954730 - Disclosure - Borrowings - DB Credit Facility (Details)",
     "menuCat": "Details",
     "order": "53",
     "role": "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
     "shortName": "Borrowings - DB Credit Facility (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i88c9c8ca64f64c26831973b0197f003b_I20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R54": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AmortizationOfFinancingCosts",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954731 - Disclosure - Borrowings - NMNLC Credit Facility II (Details)",
     "menuCat": "Details",
     "order": "54",
     "role": "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
     "shortName": "Borrowings - NMNLC Credit Facility II (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "iab2568b7cb8442b8b32300c7b8aaf585_D20230101-20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:InterestExpenseDebt",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R55": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DebtInstrumentFaceAmount",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954732 - Disclosure - Borrowings - Convertible Notes, Narrative (Details)",
     "menuCat": "Details",
     "order": "55",
     "role": "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails",
     "shortName": "Borrowings - Convertible Notes, Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "iae7f51aebb2740cb83092e2d02b4b031_D20230101-20230331",
      "decimals": "4",
      "lang": "en-US",
      "name": "us-gaap:DebtInstrumentConvertibleConversionRatio1",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     }
    },
    "R56": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ConvertibleDebtTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i07c220d2b01f42cf802d02b55ff4fe4b_D20230331-20230331",
      "decimals": "3",
      "first": true,
      "lang": "en-US",
      "name": "nmfc:DebtInstrumentConvertibleConversionPremium",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954733 - Disclosure - Borrowings - Convertible Notes, Key Terms (Details)",
     "menuCat": "Details",
     "order": "56",
     "role": "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesKeyTermsDetails",
     "shortName": "Borrowings - Convertible Notes, Key Terms (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ConvertibleDebtTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i07c220d2b01f42cf802d02b55ff4fe4b_D20230331-20230331",
      "decimals": "3",
      "first": true,
      "lang": "en-US",
      "name": "nmfc:DebtInstrumentConvertibleConversionPremium",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     }
    },
    "R57": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AmortizationOfFinancingCosts",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954734 - Disclosure - Borrowings - Convertible Notes, Other Information (Details)",
     "menuCat": "Details",
     "order": "57",
     "role": "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesOtherInformationDetails",
     "shortName": "Borrowings - Convertible Notes, Other Information (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i1731a2f05a294324ae11a01986435231_D20230101-20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:InterestExpenseDebt",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R58": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DebtInstrumentFaceAmount",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954735 - Disclosure - Borrowings - Unsecured Notes (Details)",
     "menuCat": "Details",
     "order": "58",
     "role": "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails",
     "shortName": "Borrowings - Unsecured Notes (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i5c566e03d7dc47e69ff93b8837089de4_D20230101-20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:InterestExpenseDebt",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R59": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "nmfc:GuaranteedDebt",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954736 - Disclosure - Borrowings - SBA-guaranteed Debentures, Narrative (Details)",
     "menuCat": "Details",
     "order": "59",
     "role": "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
     "shortName": "Borrowings - SBA-guaranteed Debentures, Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "INF",
      "lang": "en-US",
      "name": "nmfc:GuaranteedDebtUpfrontFees",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     }
    },
    "R6": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ProfitLoss",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "0000006 - Statement - Consolidated Statements of Cash Flows",
     "menuCat": "Statements",
     "order": "6",
     "role": "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
     "shortName": "Consolidated Statements of Cash Flows",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R60": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DebtInstrumentFaceAmount",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954737 - Disclosure - Borrowings - Summary of SBA-guaranteed Debentures (Details)",
     "menuCat": "Details",
     "order": "60",
     "role": "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails",
     "shortName": "Borrowings - Summary of SBA-guaranteed Debentures (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i5f23c88f1a9548648d4ce81d050c8a8d_I20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:DebtInstrumentFaceAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R61": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AmortizationOfFinancingCosts",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954738 - Disclosure - Borrowings - SBA-guaranteed Debenture, Other Information (Details)",
     "menuCat": "Details",
     "order": "61",
     "role": "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebentureOtherInformationDetails",
     "shortName": "Borrowings - SBA-guaranteed Debenture, Other Information (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i14d6ab73da054c8a94480e7144d79417_D20230101-20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:InterestExpenseDebt",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R62": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i61c066aa5a554249ba8b46d1e42227cc_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherCommitment",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954739 - Disclosure - Commitments and Contingencies (Details)",
     "menuCat": "Details",
     "order": "62",
     "role": "http://www.newmountainfinance.com/role/CommitmentsandContingenciesDetails",
     "shortName": "Commitments and Contingencies (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i61c066aa5a554249ba8b46d1e42227cc_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherCommitment",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R63": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:CommonStockSharesOutstanding",
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i33c0a4936d6b47b3a4f55950d23aa595_I20221231",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommonStockSharesIssued",
      "reportCount": 1,
      "unitRef": "shares",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954740 - Disclosure - Net Assets - Roll forward of Net Assets (Details)",
     "menuCat": "Details",
     "order": "63",
     "role": "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails",
     "shortName": "Net Assets - Roll forward of Net Assets (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap-supplement:InvestmentCompanyChangesInNetAssetsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i84a4ea6e69854524a335541a584edafc_D20220101-20220331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "nmfc:StockIssuedDuringPeriodValueNewIssuesAndDividendReinvestmentPlan",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R64": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PaymentsOfStockIssuanceCosts",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954741 - Disclosure - Net Assets - Narrative (Details)",
     "menuCat": "Details",
     "order": "64",
     "role": "http://www.newmountainfinance.com/role/NetAssetsNarrativeDetails",
     "shortName": "Net Assets - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "nmfc:SaleOfStockRemainingStockAvailableForIssuanceAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R65": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NetIncomeLoss",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954742 - Disclosure - Earnings Per Share (Details)",
     "menuCat": "Details",
     "order": "65",
     "role": "http://www.newmountainfinance.com/role/EarningsPerShareDetails",
     "shortName": "Earnings Per Share (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:DilutiveSecuritiesEffectOnBasicEarningsPerShareOther",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R66": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:InvestmentCompanyFinancialHighlightsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i33c0a4936d6b47b3a4f55950d23aa595_I20221231",
      "decimals": "2",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NetAssetValuePerShare",
      "reportCount": 1,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954743 - Disclosure - Financial Highlights (Details)",
     "menuCat": "Details",
     "order": "66",
     "role": "http://www.newmountainfinance.com/role/FinancialHighlightsDetails",
     "shortName": "Financial Highlights (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:InvestmentCompanyFinancialHighlightsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i802e88ce7ba44c81bd7a1b4f519e979e_I20211231",
      "decimals": "2",
      "lang": "en-US",
      "name": "us-gaap:NetAssetValuePerShare",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     }
    },
    "R67": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "2",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommonStockDividendsPerShareDeclared",
      "reportCount": 1,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "9954744 - Disclosure - Subsequent Events (Details)",
     "menuCat": "Details",
     "order": "67",
     "role": "http://www.newmountainfinance.com/role/SubsequentEventsDetails",
     "shortName": "Subsequent Events (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i3fa0e0ff1a6d49658b829a5dac75c295_D20230425-20230425",
      "decimals": "INF",
      "lang": "en-US",
      "name": "us-gaap:CommonStockDividendsPerShareDeclared",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     }
    },
    "R7": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentOwnedAtCost",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "0000007 - Statement - Consolidated Schedule of Investments",
     "menuCat": "Statements",
     "order": "7",
     "role": "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
     "shortName": "Consolidated Schedule of Investments",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": "INF",
      "lang": "en-US",
      "name": "us-gaap:ConcentrationRiskPercentage1",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     }
    },
    "R8": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "link:footnote",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i925305a82ebc490f91e3c7a84cd1cc1b_I20230331",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "nmfc:NumberOfCollateralizedAgreements",
      "reportCount": 1,
      "unitRef": "agreement",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "0000008 - Statement - Consolidated Schedule of Investments (Parenthetical)",
     "menuCat": "Statements",
     "order": "8",
     "role": "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
     "shortName": "Consolidated Schedule of Investments (Parenthetical)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": {
      "ancestors": [
       "link:footnote",
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "i1c47c1fda6624602b067c48a7f480bba_D20230101-20230331",
      "decimals": "3",
      "lang": "en-US",
      "name": "us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     }
    },
    "R9": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "0000009 - Disclosure - Formation and Business Purpose",
     "menuCat": "Notes",
     "order": "9",
     "role": "http://www.newmountainfinance.com/role/FormationandBusinessPurpose",
     "shortName": "Formation and Business Purpose",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "nmfc-20230331.htm",
      "contextRef": "ic57b4d3a5e69462c81eddbb513395690_D20230101-20230331",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    }
   },
   "segmentCount": 262,
   "tag": {
    "cef_AcquiredFundFeesAndExpensesNoteTextBlock": {
     "auth_ref": [
      "r570"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Acquired Fund Fees and Expenses, Note [Text Block]"
       }
      }
     },
     "localname": "AcquiredFundFeesAndExpensesNoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_AcquiredFundFeesAndExpensesPercent": {
     "auth_ref": [
      "r571"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Acquired Fund Fees and Expenses [Percent]"
       }
      }
     },
     "localname": "AcquiredFundFeesAndExpensesPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_AcquiredFundFeesEstimatedNoteTextBlock": {
     "auth_ref": [
      "r572"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Acquired Fund Fees Estimated, Note [Text Block]"
       }
      }
     },
     "localname": "AcquiredFundFeesEstimatedNoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_AcquiredFundIncentiveAllocationNoteTextBlock": {
     "auth_ref": [
      "r573"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Acquired Fund Incentive Allocation, Note [Text Block]"
       }
      }
     },
     "localname": "AcquiredFundIncentiveAllocationNoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_AcquiredFundTotalAnnualExpensesNoteTextBlock": {
     "auth_ref": [
      "r574"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Acquired Fund Total Annual Expenses, Note [Text Block]"
       }
      }
     },
     "localname": "AcquiredFundTotalAnnualExpensesNoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_AllRisksMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "All Risks:"
       }
      }
     },
     "localname": "AllRisksMember",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "domainItemType"
    },
    "cef_AllSecuritiesMember": {
     "auth_ref": [
      "r543"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "All Securities:"
       }
      }
     },
     "localname": "AllSecuritiesMember",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "domainItemType"
    },
    "cef_AnnualCoverageReturnRatePercent": {
     "auth_ref": [
      "r600"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Annual Coverage Return Rate [Percent]"
       }
      }
     },
     "localname": "AnnualCoverageReturnRatePercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_AnnualDividendPayment": {
     "auth_ref": [
      "r599"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Annual Dividend Payment"
       }
      }
     },
     "localname": "AnnualDividendPayment",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "perShareItemType"
    },
    "cef_AnnualDividendPaymentCurrent": {
     "auth_ref": [
      "r599"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Annual Dividend Payment, Current"
       }
      }
     },
     "localname": "AnnualDividendPaymentCurrent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "perShareItemType"
    },
    "cef_AnnualDividendPaymentInitial": {
     "auth_ref": [
      "r599"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Annual Dividend Payment, Initial"
       }
      }
     },
     "localname": "AnnualDividendPaymentInitial",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "perShareItemType"
    },
    "cef_AnnualExpensesTableTextBlock": {
     "auth_ref": [
      "r578"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Annual Expenses [Table Text Block]"
       }
      }
     },
     "localname": "AnnualExpensesTableTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_AnnualInterestRateCurrentPercent": {
     "auth_ref": [
      "r599"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Annual Interest Rate, Current [Percent]"
       }
      }
     },
     "localname": "AnnualInterestRateCurrentPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_AnnualInterestRateInitialPercent": {
     "auth_ref": [
      "r599"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Annual Interest Rate, Initial [Percent]"
       }
      }
     },
     "localname": "AnnualInterestRateInitialPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_AnnualInterestRatePercent": {
     "auth_ref": [
      "r599"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Annual Interest Rate [Percent]"
       }
      }
     },
     "localname": "AnnualInterestRatePercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_BasisOfTransactionFeesNoteTextBlock": {
     "auth_ref": [
      "r576"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Basis of Transaction Fees, Note [Text Block]"
       }
      }
     },
     "localname": "BasisOfTransactionFeesNoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_BdcFileNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "BDC File Number"
       }
      }
     },
     "localname": "BdcFileNumber",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "cef_BusinessDevelopmentCompanyFlag": {
     "auth_ref": [
      "r543"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Business Development Company [Flag]"
       }
      }
     },
     "localname": "BusinessDevelopmentCompanyFlag",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "cef_CapitalStockLongTermDebtAndOtherSecuritiesAbstract": {
     "auth_ref": [
      "r544"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Capital Stock, Long-Term Debt, and Other Securities [Abstract]"
       }
      }
     },
     "localname": "CapitalStockLongTermDebtAndOtherSecuritiesAbstract",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "stringItemType"
    },
    "cef_CapitalStockTableTextBlock": {
     "auth_ref": [
      "r545"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Capital Stock [Table Text Block]"
       }
      }
     },
     "localname": "CapitalStockTableTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_DistributionServicingFeesPercent": {
     "auth_ref": [
      "r582"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Distribution/Servicing Fees [Percent]"
       }
      }
     },
     "localname": "DistributionServicingFeesPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_DistributionsMayReducePrincipalTextBlock": {
     "auth_ref": [
      "r552"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Distributions May Reduce Principal [Text Block]"
       }
      }
     },
     "localname": "DistributionsMayReducePrincipalTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_DividendAndInterestExpensesOnShortSalesPercent": {
     "auth_ref": [
      "r582"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Dividend and Interest Expenses on Short Sales [Percent]"
       }
      }
     },
     "localname": "DividendAndInterestExpensesOnShortSalesPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_DividendExpenseOnPreferredSharesPercent": {
     "auth_ref": [
      "r582"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Dividend Expenses on Preferred Shares [Percent]"
       }
      }
     },
     "localname": "DividendExpenseOnPreferredSharesPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_DividendReinvestmentAndCashPurchaseFees": {
     "auth_ref": [
      "r568"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Dividend Reinvestment and Cash Purchase Fees"
       }
      }
     },
     "localname": "DividendReinvestmentAndCashPurchaseFees",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "monetaryItemType"
    },
    "cef_EffectsOfLeveragePurposeTextBlock": {
     "auth_ref": [
      "r601"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Effects of Leverage, Purpose [Text Block]"
       }
      }
     },
     "localname": "EffectsOfLeveragePurposeTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_EffectsOfLeverageTableTextBlock": {
     "auth_ref": [
      "r601"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Effects of Leverage [Table Text Block]"
       }
      }
     },
     "localname": "EffectsOfLeverageTableTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_EffectsOfLeverageTextBlock": {
     "auth_ref": [
      "r598"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Effects of Leverage [Text Block]"
       }
      }
     },
     "localname": "EffectsOfLeverageTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_ExpenseExampleTableTextBlock": {
     "auth_ref": [
      "r568"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example [Table Text Block]"
       }
      }
     },
     "localname": "ExpenseExampleTableTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_ExpenseExampleYear01": {
     "auth_ref": [
      "r575"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, Year 01"
       }
      }
     },
     "localname": "ExpenseExampleYear01",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "monetaryItemType"
    },
    "cef_ExpenseExampleYears1to10": {
     "auth_ref": [
      "r575"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, Years 1 to 10"
       }
      }
     },
     "localname": "ExpenseExampleYears1to10",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "monetaryItemType"
    },
    "cef_ExpenseExampleYears1to3": {
     "auth_ref": [
      "r575"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, Years 1 to 3"
       }
      }
     },
     "localname": "ExpenseExampleYears1to3",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "monetaryItemType"
    },
    "cef_ExpenseExampleYears1to5": {
     "auth_ref": [
      "r575"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, Years 1 to 5"
       }
      }
     },
     "localname": "ExpenseExampleYears1to5",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "monetaryItemType"
    },
    "cef_FeeTableAbstract": {
     "auth_ref": [
      "r568"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fee Table [Abstract]"
       }
      }
     },
     "localname": "FeeTableAbstract",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "stringItemType"
    },
    "cef_FinancialHighlightsAbstract": {
     "auth_ref": [
      "r583"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Financial Highlights [Abstract]"
       }
      }
     },
     "localname": "FinancialHighlightsAbstract",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "stringItemType"
    },
    "cef_GeneralDescriptionOfRegistrantAbstract": {
     "auth_ref": [
      "r595"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "General Description of Registrant [Abstract]"
       }
      }
     },
     "localname": "GeneralDescriptionOfRegistrantAbstract",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "stringItemType"
    },
    "cef_HighestPriceOrBid": {
     "auth_ref": [
      "r602"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Highest Price or Bid"
       }
      }
     },
     "localname": "HighestPriceOrBid",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "perShareItemType"
    },
    "cef_HighestPriceOrBidNav": {
     "auth_ref": [
      "r606"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Highest Price or Bid, NAV"
       }
      }
     },
     "localname": "HighestPriceOrBidNav",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "perShareItemType"
    },
    "cef_HighestPriceOrBidPremiumDiscountToNavPercent": {
     "auth_ref": [
      "r607"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Highest Price or Bid, Premium (Discount) to NAV [Percent]"
       }
      }
     },
     "localname": "HighestPriceOrBidPremiumDiscountToNavPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_IncentiveAllocationMaximumPercent": {
     "auth_ref": [
      "r573"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Incentive Allocation Maximum [Percent]"
       }
      }
     },
     "localname": "IncentiveAllocationMaximumPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_IncentiveAllocationMinimumPercent": {
     "auth_ref": [
      "r573"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Incentive Allocation Minimum [Percent]"
       }
      }
     },
     "localname": "IncentiveAllocationMinimumPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_IncentiveAllocationPercent": {
     "auth_ref": [
      "r573"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Incentive Allocation [Percent]"
       }
      }
     },
     "localname": "IncentiveAllocationPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_IncentiveFeesPercent": {
     "auth_ref": [
      "r582"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Incentive Fees [Percent]"
       }
      }
     },
     "localname": "IncentiveFeesPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_InterestExpensesOnBorrowingsPercent": {
     "auth_ref": [
      "r581"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Interest Expenses on Borrowings [Percent]"
       }
      }
     },
     "localname": "InterestExpensesOnBorrowingsPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_IntervalFundFlag": {
     "auth_ref": [
      "r543"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Interval Fund [Flag]"
       }
      }
     },
     "localname": "IntervalFundFlag",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "cef_InvestmentObjectivesAndPracticesTextBlock": {
     "auth_ref": [
      "r596"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Objectives and Practices [Text Block]"
       }
      }
     },
     "localname": "InvestmentObjectivesAndPracticesTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_LatestNav": {
     "auth_ref": [
      "r608"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Latest NAV"
       }
      }
     },
     "localname": "LatestNav",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "perShareItemType"
    },
    "cef_LatestPremiumDiscountToNavPercent": {
     "auth_ref": [
      "r608"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Latest Premium (Discount) to NAV [Percent]"
       }
      }
     },
     "localname": "LatestPremiumDiscountToNavPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_LatestSharePrice": {
     "auth_ref": [
      "r608"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Latest Share Price"
       }
      }
     },
     "localname": "LatestSharePrice",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "perShareItemType"
    },
    "cef_LoanServicingFeesPercent": {
     "auth_ref": [
      "r582"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Loan Servicing Fees [Percent]"
       }
      }
     },
     "localname": "LoanServicingFeesPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_LongTermDebtDividendsAndCovenantsTextBlock": {
     "auth_ref": [
      "r559"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Long Term Debt, Dividends and Covenants [Text Block]"
       }
      }
     },
     "localname": "LongTermDebtDividendsAndCovenantsTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_LongTermDebtIssuanceAndSubstitutionTextBlock": {
     "auth_ref": [
      "r560"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Long Term Debt, Issuance and Substitution [Text Block]"
       }
      }
     },
     "localname": "LongTermDebtIssuanceAndSubstitutionTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_LongTermDebtPrincipal": {
     "auth_ref": [
      "r557"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Long Term Debt, Principal"
       }
      }
     },
     "localname": "LongTermDebtPrincipal",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "monetaryItemType"
    },
    "cef_LongTermDebtRightsLimitedByOtherSecuritiesTextBlock": {
     "auth_ref": [
      "r561"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Long Term Debt, Rights Limited by Other Securities [Text Block]"
       }
      }
     },
     "localname": "LongTermDebtRightsLimitedByOtherSecuritiesTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_LongTermDebtStructuringTextBlock": {
     "auth_ref": [
      "r558"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Long Term Debt, Structuring [Text Block]"
       }
      }
     },
     "localname": "LongTermDebtStructuringTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_LongTermDebtTableTextBlock": {
     "auth_ref": [
      "r557"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Long Term Debt [Table Text Block]"
       }
      }
     },
     "localname": "LongTermDebtTableTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_LongTermDebtTitleTextBlock": {
     "auth_ref": [
      "r557"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Long Term Debt, Title [Text Block]"
       }
      }
     },
     "localname": "LongTermDebtTitleTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_LowestPriceOrBid": {
     "auth_ref": [
      "r602"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Lowest Price or Bid"
       }
      }
     },
     "localname": "LowestPriceOrBid",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "perShareItemType"
    },
    "cef_LowestPriceOrBidNav": {
     "auth_ref": [
      "r606"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Lowest Price or Bid, NAV"
       }
      }
     },
     "localname": "LowestPriceOrBidNav",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "perShareItemType"
    },
    "cef_LowestPriceOrBidPremiumDiscountToNavPercent": {
     "auth_ref": [
      "r607"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Lowest Price or Bid, Premium (Discount) to NAV [Percent]"
       }
      }
     },
     "localname": "LowestPriceOrBidPremiumDiscountToNavPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_ManagementFeeNotBasedOnNetAssetsNoteTextBlock": {
     "auth_ref": [
      "r580"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Management Fee not based on Net Assets, Note [Text Block]"
       }
      }
     },
     "localname": "ManagementFeeNotBasedOnNetAssetsNoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_ManagementFeesPercent": {
     "auth_ref": [
      "r579"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Management Fees [Percent]"
       }
      }
     },
     "localname": "ManagementFeesPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_NetExpenseOverAssetsPercent": {
     "auth_ref": [
      "r582"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Net Expense over Assets [Percent]"
       }
      }
     },
     "localname": "NetExpenseOverAssetsPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_NewCefOrBdcRegistrantFlag": {
     "auth_ref": [
      "r543"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "New CEF or BDC Registrant [Flag]"
       }
      }
     },
     "localname": "NewCefOrBdcRegistrantFlag",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "cef_NoPublicTradingTextBlock": {
     "auth_ref": [
      "r605"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "No Public Trading [Text Block]"
       }
      }
     },
     "localname": "NoPublicTradingTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_NoTradingHistoryTextBlock": {
     "auth_ref": [
      "r609"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "No Trading History [Text Block]"
       }
      }
     },
     "localname": "NoTradingHistoryTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_OtherAnnualExpense1Percent": {
     "auth_ref": [
      "r582"
     ],
     "calculation": {
      "http://xbrl.sec.gov/cef/role/Item3Ae": {
       "order": 1.0,
       "parentTag": "cef_OtherAnnualExpensesPercent",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Annual Expense 1 [Percent]"
       }
      }
     },
     "localname": "OtherAnnualExpense1Percent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_OtherAnnualExpense2Percent": {
     "auth_ref": [
      "r582"
     ],
     "calculation": {
      "http://xbrl.sec.gov/cef/role/Item3Ae": {
       "order": 2.0,
       "parentTag": "cef_OtherAnnualExpensesPercent",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Annual Expense 2 [Percent]"
       }
      }
     },
     "localname": "OtherAnnualExpense2Percent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_OtherAnnualExpense3Percent": {
     "auth_ref": [
      "r582"
     ],
     "calculation": {
      "http://xbrl.sec.gov/cef/role/Item3Ae": {
       "order": 3.0,
       "parentTag": "cef_OtherAnnualExpensesPercent",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Annual Expense 3 [Percent]"
       }
      }
     },
     "localname": "OtherAnnualExpense3Percent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_OtherAnnualExpensesAbstract": {
     "auth_ref": [
      "r582"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Annual Expenses [Abstract]"
       }
      }
     },
     "localname": "OtherAnnualExpensesAbstract",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "stringItemType"
    },
    "cef_OtherAnnualExpensesPercent": {
     "auth_ref": [
      "r582"
     ],
     "calculation": {
      "http://xbrl.sec.gov/cef/role/Item3Ae": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Annual Expenses [Percent]"
       }
      }
     },
     "localname": "OtherAnnualExpensesPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_OtherExpensesNoteTextBlock": {
     "auth_ref": [
      "r578"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Expenses, Note [Text Block]"
       }
      }
     },
     "localname": "OtherExpensesNoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_OtherFeederFundExpensesPercent": {
     "auth_ref": [
      "r582"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Feeder Fund Expenses [Percent]"
       }
      }
     },
     "localname": "OtherFeederFundExpensesPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_OtherMasterFundExpensesPercent": {
     "auth_ref": [
      "r582"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Master Fund Expenses [Percent]"
       }
      }
     },
     "localname": "OtherMasterFundExpensesPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_OtherSecuritiesTableTextBlock": {
     "auth_ref": [
      "r562"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Securities [Table Text Block]"
       }
      }
     },
     "localname": "OtherSecuritiesTableTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_OtherSecurityDescriptionTextBlock": {
     "auth_ref": [
      "r562"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Security, Description [Text Block]"
       }
      }
     },
     "localname": "OtherSecurityDescriptionTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_OtherSecurityTitleTextBlock": {
     "auth_ref": [
      "r562"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Security, Title [Text Block]"
       }
      }
     },
     "localname": "OtherSecurityTitleTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_OtherTransactionExpense1Percent": {
     "auth_ref": [
      "r577"
     ],
     "calculation": {
      "http://xbrl.sec.gov/cef/role/Item3Te": {
       "order": 1.0,
       "parentTag": "cef_OtherTransactionExpensesPercent",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Transaction Expense 1 [Percent]"
       }
      }
     },
     "localname": "OtherTransactionExpense1Percent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_OtherTransactionExpense2Percent": {
     "auth_ref": [
      "r577"
     ],
     "calculation": {
      "http://xbrl.sec.gov/cef/role/Item3Te": {
       "order": 2.0,
       "parentTag": "cef_OtherTransactionExpensesPercent",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Transaction Expense 2 [Percent]"
       }
      }
     },
     "localname": "OtherTransactionExpense2Percent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_OtherTransactionExpense3Percent": {
     "auth_ref": [
      "r577"
     ],
     "calculation": {
      "http://xbrl.sec.gov/cef/role/Item3Te": {
       "order": 3.0,
       "parentTag": "cef_OtherTransactionExpensesPercent",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Transaction Expense 3 [Percent]"
       }
      }
     },
     "localname": "OtherTransactionExpense3Percent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_OtherTransactionExpensesAbstract": {
     "auth_ref": [
      "r577"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Transaction Expenses [Abstract]"
       }
      }
     },
     "localname": "OtherTransactionExpensesAbstract",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "stringItemType"
    },
    "cef_OtherTransactionExpensesPercent": {
     "auth_ref": [
      "r577"
     ],
     "calculation": {
      "http://xbrl.sec.gov/cef/role/Item3Te": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Transaction Expenses [Percent]"
       }
      }
     },
     "localname": "OtherTransactionExpensesPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_OtherTransactionFeesBasisMaximum": {
     "auth_ref": [
      "r577"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Transaction Fees Basis, Maximum"
       }
      }
     },
     "localname": "OtherTransactionFeesBasisMaximum",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "monetaryItemType"
    },
    "cef_OtherTransactionFeesBasisMaximumPercent": {
     "auth_ref": [
      "r577"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Transaction Fees Basis, Maximum [Percent]"
       }
      }
     },
     "localname": "OtherTransactionFeesBasisMaximumPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_OtherTransactionFeesBasisNoteTextBlock": {
     "auth_ref": [
      "r577"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Transaction Fees Basis, Note [Text Block]"
       }
      }
     },
     "localname": "OtherTransactionFeesBasisNoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_OtherTransactionFeesNoteTextBlock": {
     "auth_ref": [
      "r577"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Transaction Fees, Note [Text Block]"
       }
      }
     },
     "localname": "OtherTransactionFeesNoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_OutstandingSecuritiesTableTextBlock": {
     "auth_ref": [
      "r563"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Outstanding Securities [Table Text Block]"
       }
      }
     },
     "localname": "OutstandingSecuritiesTableTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_OutstandingSecurityAuthorizedShares": {
     "auth_ref": [
      "r565"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Outstanding Security, Authorized [Shares]"
       }
      }
     },
     "localname": "OutstandingSecurityAuthorizedShares",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "sharesItemType"
    },
    "cef_OutstandingSecurityHeldShares": {
     "auth_ref": [
      "r566"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Outstanding Security, Held [Shares]"
       }
      }
     },
     "localname": "OutstandingSecurityHeldShares",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "sharesItemType"
    },
    "cef_OutstandingSecurityNotHeldShares": {
     "auth_ref": [
      "r567"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Outstanding Security, Not Held [Shares]"
       }
      }
     },
     "localname": "OutstandingSecurityNotHeldShares",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "sharesItemType"
    },
    "cef_OutstandingSecurityTitleTextBlock": {
     "auth_ref": [
      "r564"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Outstanding Security, Title [Text Block]"
       }
      }
     },
     "localname": "OutstandingSecurityTitleTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_PreferredStockRestrictionsArrearageTextBlock": {
     "auth_ref": [
      "r553"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Preferred Stock Restrictions, Arrearage [Text Block]"
       }
      }
     },
     "localname": "PreferredStockRestrictionsArrearageTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_PreferredStockRestrictionsOtherTextBlock": {
     "auth_ref": [
      "r554"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Preferred Stock Restrictions, Other [Text Block]"
       }
      }
     },
     "localname": "PreferredStockRestrictionsOtherTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_PrimaryShelfFlag": {
     "auth_ref": [
      "r543"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Primary Shelf [Flag]"
       }
      }
     },
     "localname": "PrimaryShelfFlag",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "cef_PrimaryShelfQualifiedFlag": {
     "auth_ref": [
      "r543"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Primary Shelf Qualified [Flag]"
       }
      }
     },
     "localname": "PrimaryShelfQualifiedFlag",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "cef_ProspectusLineItems": {
     "auth_ref": [
      "r543"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Prospectus [Line Items]"
       }
      }
     },
     "localname": "ProspectusLineItems",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "xbrltype": "stringItemType"
    },
    "cef_ProspectusTable": {
     "auth_ref": [
      "r543"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Prospectus:"
       }
      }
     },
     "localname": "ProspectusTable",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "stringItemType"
    },
    "cef_PurposeOfFeeTableNoteTextBlock": {
     "auth_ref": [
      "r569"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Purpose of Fee Table , Note [Text Block]"
       }
      }
     },
     "localname": "PurposeOfFeeTableNoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_RegisteredClosedEndFundFlag": {
     "auth_ref": [
      "r543"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Registered Closed-End Fund [Flag]"
       }
      }
     },
     "localname": "RegisteredClosedEndFundFlag",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "cef_ReturnAtMinusFivePercent": {
     "auth_ref": [
      "r601"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Return at Minus Five [Percent]"
       }
      }
     },
     "localname": "ReturnAtMinusFivePercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_ReturnAtMinusTenPercent": {
     "auth_ref": [
      "r601"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Return at Minus Ten [Percent]"
       }
      }
     },
     "localname": "ReturnAtMinusTenPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_ReturnAtPlusFivePercent": {
     "auth_ref": [
      "r601"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Return at Plus Five [Percent]"
       }
      }
     },
     "localname": "ReturnAtPlusFivePercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_ReturnAtPlusTenPercent": {
     "auth_ref": [
      "r601"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Return at Plus Ten [Percent]"
       }
      }
     },
     "localname": "ReturnAtPlusTenPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_ReturnAtZeroPercent": {
     "auth_ref": [
      "r601"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Return at Zero [Percent]"
       }
      }
     },
     "localname": "ReturnAtZeroPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_RightsLimitedByOtherSecuritiesTextBlock": {
     "auth_ref": [
      "r556"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Rights Limited by Other Securities [Text Block]"
       }
      }
     },
     "localname": "RightsLimitedByOtherSecuritiesTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_RightsSubjectToOtherThanMajorityVoteTextBlock": {
     "auth_ref": [
      "r555"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Rights Subject to Other than Majority Vote [Text Block]"
       }
      }
     },
     "localname": "RightsSubjectToOtherThanMajorityVoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_RiskAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Risk [Axis]"
       }
      }
     },
     "localname": "RiskAxis",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "stringItemType"
    },
    "cef_RiskFactorsTableTextBlock": {
     "auth_ref": [
      "r597"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Risk Factors [Table Text Block]"
       }
      }
     },
     "localname": "RiskFactorsTableTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_RiskTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Risk [Text Block]"
       }
      }
     },
     "localname": "RiskTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_SalesLoadPercent": {
     "auth_ref": [
      "r568"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Sales Load [Percent]"
       }
      }
     },
     "localname": "SalesLoadPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_SecurityAxis": {
     "auth_ref": [
      "r543"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security [Axis]"
       }
      }
     },
     "localname": "SecurityAxis",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "stringItemType"
    },
    "cef_SecurityDividendsTextBlock": {
     "auth_ref": [
      "r546"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security Dividends [Text Block]"
       }
      }
     },
     "localname": "SecurityDividendsTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_SecurityLiabilitiesTextBlock": {
     "auth_ref": [
      "r549"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security Liabilities [Text Block]"
       }
      }
     },
     "localname": "SecurityLiabilitiesTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_SecurityLiquidationRightsTextBlock": {
     "auth_ref": [
      "r548"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security Liquidation Rights [Text Block]"
       }
      }
     },
     "localname": "SecurityLiquidationRightsTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_SecurityObligationsOfOwnershipTextBlock": {
     "auth_ref": [
      "r551"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security Obligations of Ownership [Text Block]"
       }
      }
     },
     "localname": "SecurityObligationsOfOwnershipTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_SecurityPreemptiveAndOtherRightsTextBlock": {
     "auth_ref": [
      "r550"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security Preemptive and Other Rights [Text Block]"
       }
      }
     },
     "localname": "SecurityPreemptiveAndOtherRightsTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_SecurityTitleTextBlock": {
     "auth_ref": [
      "r545"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security Title [Text Block]"
       }
      }
     },
     "localname": "SecurityTitleTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_SecurityVotingRightsTextBlock": {
     "auth_ref": [
      "r547"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security Voting Rights [Text Block]"
       }
      }
     },
     "localname": "SecurityVotingRightsTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_SeniorSecuritiesAmount": {
     "auth_ref": [
      "r588"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Senior Securities Amount"
       }
      }
     },
     "localname": "SeniorSecuritiesAmount",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "monetaryItemType"
    },
    "cef_SeniorSecuritiesAverageMarketValuePerUnit": {
     "auth_ref": [
      "r591"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Senior Securities Average Market Value per Unit"
       }
      }
     },
     "localname": "SeniorSecuritiesAverageMarketValuePerUnit",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "perShareItemType"
    },
    "cef_SeniorSecuritiesAveragingMethodNoteTextBlock": {
     "auth_ref": [
      "r593"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Senior Securities Averaging Method, Note [Text Block]"
       }
      }
     },
     "localname": "SeniorSecuritiesAveragingMethodNoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_SeniorSecuritiesCoveragePerUnit": {
     "auth_ref": [
      "r589"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Senior Securities Coverage per Unit"
       }
      }
     },
     "localname": "SeniorSecuritiesCoveragePerUnit",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "perShareItemType"
    },
    "cef_SeniorSecuritiesHeadingsNoteTextBlock": {
     "auth_ref": [
      "r594"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Senior Securities Headings, Note [Text Block]"
       }
      }
     },
     "localname": "SeniorSecuritiesHeadingsNoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_SeniorSecuritiesHighlightsAnnualizedNoteTextBlock": {
     "auth_ref": [
      "r585",
      "r592"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Senior Securities Highlights Annualized, Note [Text Block]"
       }
      }
     },
     "localname": "SeniorSecuritiesHighlightsAnnualizedNoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_SeniorSecuritiesHighlightsAuditedNoteTextBlock": {
     "auth_ref": [
      "r586",
      "r592"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Senior Securities Highlights Audited, Note [Text Block]"
       }
      }
     },
     "localname": "SeniorSecuritiesHighlightsAuditedNoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_SeniorSecuritiesInvoluntaryLiquidatingPreferencePerUnit": {
     "auth_ref": [
      "r590"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Senior Securities Involuntary Liquidating Preference per Unit"
       }
      }
     },
     "localname": "SeniorSecuritiesInvoluntaryLiquidatingPreferencePerUnit",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "perShareItemType"
    },
    "cef_SeniorSecuritiesNoteTextBlock": {
     "auth_ref": [
      "r584",
      "r592"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Senior Securities, Note [Text Block]"
       }
      }
     },
     "localname": "SeniorSecuritiesNoteTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_SeniorSecuritiesTableTextBlock": {
     "auth_ref": [
      "r587"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Senior Securities [Table Text Block]"
       }
      }
     },
     "localname": "SeniorSecuritiesTableTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_SharePriceTableTextBlock": {
     "auth_ref": [
      "r603"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Share Price [Table Text Block]"
       }
      }
     },
     "localname": "SharePriceTableTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_SharePricesNotActualTransactionsTextBlock": {
     "auth_ref": [
      "r604"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Share Prices Not Actual Transactions [Text Block]"
       }
      }
     },
     "localname": "SharePricesNotActualTransactionsTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_ShareholderTransactionExpensesTableTextBlock": {
     "auth_ref": [
      "r568"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Shareholder Transaction Expenses [Table Text Block]"
       }
      }
     },
     "localname": "ShareholderTransactionExpensesTableTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_TotalAnnualExpensesPercent": {
     "auth_ref": [
      "r581"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Total Annual Expenses [Percent]"
       }
      }
     },
     "localname": "TotalAnnualExpensesPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_UnderwritersCompensationPercent": {
     "auth_ref": [
      "r577"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Underwriters Compensation [Percent]"
       }
      }
     },
     "localname": "UnderwritersCompensationPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_WaiversAndReimbursementsOfFeesPercent": {
     "auth_ref": [
      "r582"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Waivers and Reimbursements of Fees [Percent]"
       }
      }
     },
     "localname": "WaiversAndReimbursementsOfFeesPercent",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "percentItemType"
    },
    "cef_WarrantsOrRightsCalledAmount": {
     "auth_ref": [
      "r562"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Warrants or Rights, Called Amount"
       }
      }
     },
     "localname": "WarrantsOrRightsCalledAmount",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "monetaryItemType"
    },
    "cef_WarrantsOrRightsCalledPeriodDate": {
     "auth_ref": [
      "r562"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Warrants or Rights, Called Period [Date]"
       }
      }
     },
     "localname": "WarrantsOrRightsCalledPeriodDate",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "dateItemType"
    },
    "cef_WarrantsOrRightsCalledTitleTextBlock": {
     "auth_ref": [
      "r562"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Warrants or Rights, Called Title"
       }
      }
     },
     "localname": "WarrantsOrRightsCalledTitleTextBlock",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "textBlockItemType"
    },
    "cef_WarrantsOrRightsExercisePrice": {
     "auth_ref": [
      "r562"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Warrants or Rights, Exercise Price"
       }
      }
     },
     "localname": "WarrantsOrRightsExercisePrice",
     "nsuri": "http://xbrl.sec.gov/cef/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "perShareItemType"
    },
    "country_AU": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "AUSTRALIA",
        "terseLabel": "Australia"
       }
      }
     },
     "localname": "AU",
     "nsuri": "http://xbrl.sec.gov/country/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "country_CA": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "CANADA",
        "terseLabel": "Canada"
       }
      }
     },
     "localname": "CA",
     "nsuri": "http://xbrl.sec.gov/country/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "country_GB": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "UNITED KINGDOM",
        "terseLabel": "United Kingdom"
       }
      }
     },
     "localname": "GB",
     "nsuri": "http://xbrl.sec.gov/country/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "country_HK": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "HONG KONG",
        "terseLabel": "Hong Kong"
       }
      }
     },
     "localname": "HK",
     "nsuri": "http://xbrl.sec.gov/country/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "country_JE": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "JERSEY",
        "terseLabel": "Jersey"
       }
      }
     },
     "localname": "JE",
     "nsuri": "http://xbrl.sec.gov/country/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "country_NL": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "NETHERLANDS",
        "terseLabel": "Netherlands"
       }
      }
     },
     "localname": "NL",
     "nsuri": "http://xbrl.sec.gov/country/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "country_US": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "UNITED STATES",
        "terseLabel": "United States"
       }
      }
     },
     "localname": "US",
     "nsuri": "http://xbrl.sec.gov/country/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "dei_AdditionalSecurities462b": {
     "auth_ref": [
      "r620"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Additional Securities. 462(b)"
       }
      }
     },
     "localname": "AdditionalSecurities462b",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_AdditionalSecurities462bFileNumber": {
     "auth_ref": [
      "r620"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Additional Securities, 462(b), File Number"
       }
      }
     },
     "localname": "AdditionalSecurities462bFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_AdditionalSecuritiesEffective413b": {
     "auth_ref": [
      "r619"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Additional Securities Effective, 413(b)"
       }
      }
     },
     "localname": "AdditionalSecuritiesEffective413b",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_AddressTypeDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "An entity may have several addresses for different purposes and this domain represents all such types.",
        "label": "Address Type [Domain]"
       }
      }
     },
     "localname": "AddressTypeDomain",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "domainItemType"
    },
    "dei_AmendmentDescription": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Description of changes contained within amended document.",
        "label": "Amendment Description"
       }
      }
     },
     "localname": "AmendmentDescription",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "stringItemType"
    },
    "dei_AmendmentFlag": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.",
        "label": "Amendment Flag",
        "terseLabel": "Amendment Flag"
       }
      }
     },
     "localname": "AmendmentFlag",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover",
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_ApproximateDateOfCommencementOfProposedSaleToThePublic": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The approximate date of a commencement of a proposed sale of securities to the public. This element is disclosed in S-1, S-3, S-4, S-11, F-1, F-3 and F-10 filings.",
        "label": "Approximate Date of Commencement of Proposed Sale to Public"
       }
      }
     },
     "localname": "ApproximateDateOfCommencementOfProposedSaleToThePublic",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "dateOrAsapItemType"
    },
    "dei_BusinessContactMember": {
     "auth_ref": [
      "r540",
      "r541"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Business contact for the entity",
        "label": "Business Contact [Member]"
       }
      }
     },
     "localname": "BusinessContactMember",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "domainItemType"
    },
    "dei_CityAreaCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Area code of city",
        "label": "City Area Code",
        "terseLabel": "City Area Code"
       }
      }
     },
     "localname": "CityAreaCode",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover",
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_ContactPersonnelName": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of contact personnel",
        "label": "Contact Personnel Name"
       }
      }
     },
     "localname": "ContactPersonnelName",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_CoverAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cover page.",
        "label": "Cover [Abstract]"
       }
      }
     },
     "localname": "CoverAbstract",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "stringItemType"
    },
    "dei_CurrentFiscalYearEndDate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "End date of current fiscal year in the format --MM-DD.",
        "label": "Current Fiscal Year End Date",
        "terseLabel": "Current Fiscal Year End Date"
       }
      }
     },
     "localname": "CurrentFiscalYearEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "gMonthDayItemType"
    },
    "dei_DelayedOrContinuousOffering": {
     "auth_ref": [
      "r542",
      "r543",
      "r613"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Delayed or Continuous Offering"
       }
      }
     },
     "localname": "DelayedOrContinuousOffering",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DividendOrInterestReinvestmentPlanOnly": {
     "auth_ref": [
      "r542",
      "r543",
      "r613"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Dividend or Interest Reinvestment Plan Only"
       }
      }
     },
     "localname": "DividendOrInterestReinvestmentPlanOnly",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentFiscalPeriodFocus": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fiscal period values are FY, Q1, Q2, and Q3.  1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY.",
        "label": "Document Fiscal Period Focus",
        "terseLabel": "Document Fiscal Period Focus"
       }
      }
     },
     "localname": "DocumentFiscalPeriodFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "fiscalPeriodItemType"
    },
    "dei_DocumentFiscalYearFocus": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This is focus fiscal year of the document report in YYYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.",
        "label": "Document Fiscal Year Focus",
        "terseLabel": "Document Fiscal Year Focus"
       }
      }
     },
     "localname": "DocumentFiscalYearFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "gYearItemType"
    },
    "dei_DocumentPeriodEndDate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period.  The format of the date is YYYY-MM-DD.",
        "label": "Document Period End Date",
        "terseLabel": "Document Period End Date"
       }
      }
     },
     "localname": "DocumentPeriodEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_DocumentQuarterlyReport": {
     "auth_ref": [
      "r539"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as an quarterly report.",
        "label": "Document Quarterly Report",
        "terseLabel": "Document Quarterly Report"
       }
      }
     },
     "localname": "DocumentQuarterlyReport",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentRegistrationStatement": {
     "auth_ref": [
      "r535"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as a registration statement.",
        "label": "Document Registration Statement"
       }
      }
     },
     "localname": "DocumentRegistrationStatement",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentTransitionReport": {
     "auth_ref": [
      "r614"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as a transition report.",
        "label": "Document Transition Report",
        "terseLabel": "Document Transition Report"
       }
      }
     },
     "localname": "DocumentTransitionReport",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentType": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.",
        "label": "Document Type",
        "terseLabel": "Document Type"
       }
      }
     },
     "localname": "DocumentType",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover",
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "submissionTypeItemType"
    },
    "dei_EffectiveAfter60Days486a": {
     "auth_ref": [
      "r624"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Effective after 60 Days, 486(a)"
       }
      }
     },
     "localname": "EffectiveAfter60Days486a",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EffectiveOnDate486a": {
     "auth_ref": [
      "r624"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Effective on Date, 486(a)"
       }
      }
     },
     "localname": "EffectiveOnDate486a",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_EffectiveOnDate486b": {
     "auth_ref": [
      "r625"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Effective on Date, 486(b)"
       }
      }
     },
     "localname": "EffectiveOnDate486b",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_EffectiveOnSetDate486a": {
     "auth_ref": [
      "r624"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Effective on Set Date, 486(a)"
       }
      }
     },
     "localname": "EffectiveOnSetDate486a",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EffectiveOnSetDate486b": {
     "auth_ref": [
      "r625"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Effective on Set Date, 486(b)"
       }
      }
     },
     "localname": "EffectiveOnSetDate486b",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EffectiveUponFiling462e": {
     "auth_ref": [
      "r623"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Effective Upon Filing, 462(e)"
       }
      }
     },
     "localname": "EffectiveUponFiling462e",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EffectiveUponFiling486b": {
     "auth_ref": [
      "r625"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Effective upon Filing, 486(b)"
       }
      }
     },
     "localname": "EffectiveUponFiling486b",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EffectiveWhenDeclaredSection8c": {
     "auth_ref": [
      "r627"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Effective when Declared, Section 8(c)"
       }
      }
     },
     "localname": "EffectiveWhenDeclaredSection8c",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityAddressAddressLine1": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Address Line 1 such as Attn, Building Name, Street Name",
        "label": "Entity Address, Address Line One",
        "terseLabel": "Entity Address, Address Line One"
       }
      }
     },
     "localname": "EntityAddressAddressLine1",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover",
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressAddressLine2": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Address Line 2 such as Street or Suite number",
        "label": "Entity Address, Address Line Two"
       }
      }
     },
     "localname": "EntityAddressAddressLine2",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressAddressLine3": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Address Line 3 such as an Office Park",
        "label": "Entity Address, Address Line Three"
       }
      }
     },
     "localname": "EntityAddressAddressLine3",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressCityOrTown": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the City or Town",
        "label": "Entity Address, City or Town",
        "terseLabel": "Entity Address, City or Town"
       }
      }
     },
     "localname": "EntityAddressCityOrTown",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover",
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressPostalZipCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Code for the postal or zip code",
        "label": "Entity Address, Postal Zip Code",
        "terseLabel": "Entity Address, Postal Zip Code"
       }
      }
     },
     "localname": "EntityAddressPostalZipCode",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover",
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressStateOrProvince": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the state or province.",
        "label": "Entity Address, State or Province",
        "terseLabel": "Entity Address, State or Province"
       }
      }
     },
     "localname": "EntityAddressStateOrProvince",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover",
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "stateOrProvinceItemType"
    },
    "dei_EntityAddressesAddressTypeAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table.",
        "label": "Entity Addresses, Address Type [Axis]"
       }
      }
     },
     "localname": "EntityAddressesAddressTypeAxis",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "stringItemType"
    },
    "dei_EntityCentralIndexKey": {
     "auth_ref": [
      "r537"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.",
        "label": "Entity Central Index Key",
        "terseLabel": "Entity Central Index Key"
       }
      }
     },
     "localname": "EntityCentralIndexKey",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover",
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "centralIndexKeyItemType"
    },
    "dei_EntityCommonStockSharesOutstanding": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.",
        "label": "Entity Common Stock, Shares Outstanding",
        "terseLabel": "Entity Common Stock, Shares Outstanding"
       }
      }
     },
     "localname": "EntityCommonStockSharesOutstanding",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "sharesItemType"
    },
    "dei_EntityCurrentReportingStatus": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure.",
        "label": "Entity Current Reporting Status",
        "terseLabel": "Entity Current Reporting Status"
       }
      }
     },
     "localname": "EntityCurrentReportingStatus",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "All the names of the entities being reported upon in a document. Any legal structure used to conduct activities or to hold assets. Some examples of such structures are corporations, partnerships, limited liability companies, grantor trusts, and other trusts. This item does not include business and geographical segments which are included in the geographical or business segments domains.",
        "label": "Entity [Domain]",
        "terseLabel": "Entity [Domain]"
       }
      }
     },
     "localname": "EntityDomain",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesSummaryofPropertiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "dei_EntityEmergingGrowthCompany": {
     "auth_ref": [
      "r537"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate if registrant meets the emerging growth company criteria.",
        "label": "Entity Emerging Growth Company",
        "terseLabel": "Entity Emerging Growth Company"
       }
      }
     },
     "localname": "EntityEmergingGrowthCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover",
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityExTransitionPeriod": {
     "auth_ref": [
      "r626"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate if an emerging growth company has elected not to use the extended transition period for complying with any new or revised financial accounting standards.",
        "label": "Entity Ex Transition Period"
       }
      }
     },
     "localname": "EntityExTransitionPeriod",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityFileNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.",
        "label": "Securities Act File Number",
        "terseLabel": "Entity File Number"
       }
      }
     },
     "localname": "EntityFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover",
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_EntityFilerCategory": {
     "auth_ref": [
      "r537"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate whether the registrant is one of the following: Large Accelerated Filer, Accelerated Filer, Non-accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.",
        "label": "Entity Filer Category",
        "terseLabel": "Entity Filer Category"
       }
      }
     },
     "localname": "EntityFilerCategory",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "filerCategoryItemType"
    },
    "dei_EntityIncorporationStateCountryCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Two-character EDGAR code representing the state or country of incorporation.",
        "label": "Entity Incorporation, State or Country Code",
        "terseLabel": "Entity Incorporation, State or Country Code"
       }
      }
     },
     "localname": "EntityIncorporationStateCountryCode",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "edgarStateCountryItemType"
    },
    "dei_EntityInteractiveDataCurrent": {
     "auth_ref": [
      "r617"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).",
        "label": "Entity Interactive Data Current",
        "terseLabel": "Entity Interactive Data Current"
       }
      }
     },
     "localname": "EntityInteractiveDataCurrent",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityInvCompanyType": {
     "auth_ref": [
      "r616"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "One of: N-1A (Mutual Fund), N-1 (Open-End Separate Account with No Variable Annuities), N-2 (Closed-End Investment Company), N-3 (Separate Account Registered as Open-End Management Investment Company), N-4 (Variable Annuity UIT Separate Account), N-5 (Small Business Investment Company), N-6 (Variable Life UIT Separate Account), S-1 or S-3 (Face Amount Certificate Company), S-6 (UIT, Non-Insurance Product).",
        "label": "Entity Inv Company Type"
       }
      }
     },
     "localname": "EntityInvCompanyType",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "invCompanyType"
    },
    "dei_EntityRegistrantName": {
     "auth_ref": [
      "r537"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.",
        "label": "Entity Registrant Name",
        "terseLabel": "Entity Registrant Name"
       }
      }
     },
     "localname": "EntityRegistrantName",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover",
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityShellCompany": {
     "auth_ref": [
      "r537"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act.",
        "label": "Entity Shell Company",
        "terseLabel": "Entity Shell Company"
       }
      }
     },
     "localname": "EntityShellCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntitySmallBusiness": {
     "auth_ref": [
      "r537"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicates that the company is a Smaller Reporting Company (SRC).",
        "label": "Entity Small Business",
        "terseLabel": "Entity Small Business"
       }
      }
     },
     "localname": "EntitySmallBusiness",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityTaxIdentificationNumber": {
     "auth_ref": [
      "r537"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.",
        "label": "Entity Tax Identification Number",
        "terseLabel": "Entity Tax Identification Number"
       }
      }
     },
     "localname": "EntityTaxIdentificationNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "employerIdItemType"
    },
    "dei_EntityWellKnownSeasonedIssuer": {
     "auth_ref": [
      "r618"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate 'Yes' or 'No' if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Is used on Form Type: 10-K, 10-Q, 8-K, 20-F, 6-K, 10-K/A, 10-Q/A, 20-F/A, 6-K/A, N-CSR, N-Q, N-1A.",
        "label": "Entity Well-known Seasoned Issuer"
       }
      }
     },
     "localname": "EntityWellKnownSeasonedIssuer",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_ExhibitsOnly462d": {
     "auth_ref": [
      "r622"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Exhibits Only, 462(d)"
       }
      }
     },
     "localname": "ExhibitsOnly462d",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_ExhibitsOnly462dFileNumber": {
     "auth_ref": [
      "r622"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Exhibits Only, 462(d), File Number"
       }
      }
     },
     "localname": "ExhibitsOnly462dFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_InvestmentCompanyActFileNumber": {
     "auth_ref": [
      "r543",
      "r610",
      "r611",
      "r612"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company Act File Number"
       }
      }
     },
     "localname": "InvestmentCompanyActFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_InvestmentCompanyActRegistration": {
     "auth_ref": [
      "r615"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company Act Registration"
       }
      }
     },
     "localname": "InvestmentCompanyActRegistration",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_InvestmentCompanyRegistrationAmendment": {
     "auth_ref": [
      "r615"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company Registration Amendment"
       }
      }
     },
     "localname": "InvestmentCompanyRegistrationAmendment",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_InvestmentCompanyRegistrationAmendmentNumber": {
     "auth_ref": [
      "r615"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company Registration Amendment Number"
       }
      }
     },
     "localname": "InvestmentCompanyRegistrationAmendmentNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "sequenceNumberItemType"
    },
    "dei_LegalEntityAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The set of legal entities associated with a report.",
        "label": "Legal Entity [Axis]",
        "terseLabel": "Legal Entity [Axis]"
       }
      }
     },
     "localname": "LegalEntityAxis",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesSummaryofPropertiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "dei_LocalPhoneNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Local phone number for entity.",
        "label": "Local Phone Number",
        "terseLabel": "Local Phone Number"
       }
      }
     },
     "localname": "LocalPhoneNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover",
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_NewEffectiveDateForPreviousFiling": {
     "auth_ref": [
      "r543",
      "r610",
      "r611",
      "r612"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "New Effective Date for Previous Filing"
       }
      }
     },
     "localname": "NewEffectiveDateForPreviousFiling",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_NoSubstantiveChanges462c": {
     "auth_ref": [
      "r621"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "No Substantive Changes, 462(c)"
       }
      }
     },
     "localname": "NoSubstantiveChanges462c",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_NoSubstantiveChanges462cFileNumber": {
     "auth_ref": [
      "r621"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "No Substantive Changes, 462(c), File Number"
       }
      }
     },
     "localname": "NoSubstantiveChanges462cFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_PostEffectiveAmendment": {
     "auth_ref": [
      "r535"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Post-Effective Amendment"
       }
      }
     },
     "localname": "PostEffectiveAmendment",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_PostEffectiveAmendmentNumber": {
     "auth_ref": [
      "r535"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amendment number to registration statement under the Securities Act of 1933 after the registration becomes effective.",
        "label": "Post-Effective Amendment Number"
       }
      }
     },
     "localname": "PostEffectiveAmendmentNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "sequenceNumberItemType"
    },
    "dei_PreEffectiveAmendment": {
     "auth_ref": [
      "r535"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Pre-Effective Amendment"
       }
      }
     },
     "localname": "PreEffectiveAmendment",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_PreEffectiveAmendmentNumber": {
     "auth_ref": [
      "r535"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amendment number to registration statement under the Securities Act of 1933 before the registration becomes effective.",
        "label": "Pre-Effective Amendment Number"
       }
      }
     },
     "localname": "PreEffectiveAmendmentNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "sequenceNumberItemType"
    },
    "dei_Security12bTitle": {
     "auth_ref": [
      "r536"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Title of a 12(b) registered security.",
        "label": "Title of 12(b) Security",
        "terseLabel": "Title of 12(b) Security"
       }
      }
     },
     "localname": "Security12bTitle",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "securityTitleItemType"
    },
    "dei_SecurityExchangeName": {
     "auth_ref": [
      "r538"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the Exchange on which a security is registered.",
        "label": "Security Exchange Name",
        "terseLabel": "Security Exchange Name"
       }
      }
     },
     "localname": "SecurityExchangeName",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "edgarExchangeCodeItemType"
    },
    "dei_TradingSymbol": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Trading symbol of an instrument as listed on an exchange.",
        "label": "Trading Symbol",
        "terseLabel": "Trading Symbol"
       }
      }
     },
     "localname": "TradingSymbol",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Cover"
     ],
     "xbrltype": "tradingSymbolItemType"
    },
    "nmfc_A2018ConvertibleNotesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "2018 Convertible Notes",
        "label": "2018 Convertible Notes [Member]",
        "terseLabel": "2018 Convertible Notes"
       }
      }
     },
     "localname": "A2018ConvertibleNotesMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesKeyTermsDetails",
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_A2022ConvertibleNotesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "2022 Convertible Notes",
        "label": "2022 Convertible Notes [Member]",
        "terseLabel": "2022 Convertible Notes"
       }
      }
     },
     "localname": "A2022ConvertibleNotesMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesKeyTermsDetails",
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_AAHTopcoLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "AAH Topco, LLC",
        "label": "AAH Topco, LLC [Member]",
        "terseLabel": "AAH Topco, LLC"
       }
      }
     },
     "localname": "AAHTopcoLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_ACIGroupHoldingsIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "ACI Group Holdings, Inc.",
        "label": "ACI Group Holdings, Inc. [Member]",
        "terseLabel": "ACI Group Holdings, Inc."
       }
      }
     },
     "localname": "ACIGroupHoldingsIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_ADGLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "ADG, LLC",
        "label": "ADG, LLC [Member]",
        "terseLabel": "ADG, LLC"
       }
      }
     },
     "localname": "ADGLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_AdjustmentsToReconcileNetAssetsFromOperationsToCashProvidedByUsedInOperatingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Adjustments To Reconcile Net Assets From Operations To Cash Provided by (Used in) Operating Activities",
        "label": "Adjustments To Reconcile Net Assets From Operations To Cash Provided by (Used in) Operating Activities [Abstract]",
        "terseLabel": "Adjustments to reconcile net increase in net assets resulting from operations to net cash (used in) provided by operating activities:"
       }
      }
     },
     "localname": "AdjustmentsToReconcileNetAssetsFromOperationsToCashProvidedByUsedInOperatingActivitiesAbstract",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "nmfc_AdministrationAgreementMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Administration Agreement",
        "label": "Administration Agreement [Member]",
        "terseLabel": "Administration Agreement"
       }
      }
     },
     "localname": "AdministrationAgreementMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_AfterReinvestmentPeriodMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "After Reinvestment Period",
        "label": "After Reinvestment Period [Member]",
        "terseLabel": "After Reinvestment Period"
       }
      }
     },
     "localname": "AfterReinvestmentPeriodMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_AmeriVetPartnersManagementIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "AmeriVet Partners Management, Inc.",
        "label": "AmeriVet Partners Management, Inc. [Member]",
        "terseLabel": "AmeriVet Partners Management, Inc."
       }
      }
     },
     "localname": "AmeriVetPartnersManagementIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_AmericanAchievementCorporationAkaAACHoldingCorpMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "American Achievement Corporation (aka AAC Holding Corp.)",
        "label": "American Achievement Corporation (aka AAC Holding Corp.) [Member]",
        "terseLabel": "American Achievement Corporation (aka AAC Holding Corp.)"
       }
      }
     },
     "localname": "AmericanAchievementCorporationAkaAACHoldingCorpMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_AnsiraHoldingsIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Ansira Holdings, Inc.",
        "label": "Ansira Holdings, Inc. [Member]",
        "terseLabel": "Ansira Holdings, Inc."
       }
      }
     },
     "localname": "AnsiraHoldingsIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_ApprissHealthLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Appriss Health, LLC",
        "label": "Appriss Health, LLC [Member]",
        "terseLabel": "Appriss Health, LLC"
       }
      }
     },
     "localname": "ApprissHealthLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_ApptioIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Apptio, Inc.",
        "label": "Apptio, Inc. [Member]",
        "terseLabel": "Apptio, Inc."
       }
      }
     },
     "localname": "ApptioIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_AssetCoverageRequiredRatioMinimum": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Asset Coverage, Required Ratio, Minimum",
        "label": "Asset Coverage, Required Ratio, Minimum",
        "terseLabel": "Minimum asset coverage ratio"
       }
      }
     },
     "localname": "AssetCoverageRequiredRatioMinimum",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsGeneralNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_AssociationsIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Associations, Inc.",
        "label": "Associations, Inc. [Member]",
        "terseLabel": "Associations, Inc."
       }
      }
     },
     "localname": "AssociationsIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_AtTheMarketOfferingMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "At the Market Offering",
        "label": "At the Market Offering [Member]",
        "terseLabel": "ATM Offering"
       }
      }
     },
     "localname": "AtTheMarketOfferingMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_AuctaneIncFkaStampscomMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Auctane, Inc. (fka Stamps.com)",
        "label": "Auctane, Inc. (fka Stamps.com) [Member]",
        "terseLabel": "Auctane, Inc. (fka Stamps.com)"
       }
      }
     },
     "localname": "AuctaneIncFkaStampscomMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_AvalaraIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Avalara, Inc.",
        "label": "Avalara, Inc. [Member]",
        "terseLabel": "Avalara, Inc."
       }
      }
     },
     "localname": "AvalaraIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_AverageNetAssets": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Average Net Assets",
        "label": "Average Net Assets",
        "terseLabel": "Average net assets for the period"
       }
      }
     },
     "localname": "AverageNetAssets",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_BlackElkTrusteeMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Black Elk Trustee",
        "label": "Black Elk Trustee [Member]",
        "terseLabel": "Black Elk Trustee"
       }
      }
     },
     "localname": "BlackElkTrusteeMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_BluefinHoldingLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Bluefin Holding, LLC",
        "label": "Bluefin Holding, LLC [Member]",
        "terseLabel": "Bluefin Holding, LLC"
       }
      }
     },
     "localname": "BluefinHoldingLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_BraveParentHoldingsIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Brave Parent Holdings, Inc.",
        "label": "Brave Parent Holdings, Inc. [Member]",
        "terseLabel": "Brave Parent Holdings, Inc."
       }
      }
     },
     "localname": "BraveParentHoldingsIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_BullhornIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Bullhorn, Inc.",
        "label": "Bullhorn, Inc. [Member]",
        "terseLabel": "Bullhorn, Inc."
       }
      }
     },
     "localname": "BullhornIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_BusinessProductsSectorMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Business Products Sector",
        "label": "Business Products Sector [Member]",
        "terseLabel": "Business Products"
       }
      }
     },
     "localname": "BusinessProductsSectorMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_BusinessServicesSectorMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Business Services Sector",
        "label": "Business Services Sector [Member]",
        "terseLabel": "Business Services"
       }
      }
     },
     "localname": "BusinessServicesSectorMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_CFSManagementLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "CFS Management, LLC",
        "label": "CFS Management, LLC [Member]",
        "terseLabel": "CFS Management, LLC"
       }
      }
     },
     "localname": "CFSManagementLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_CGGroupHoldingsLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "CG Group Holdings, LLC",
        "label": "CG Group Holdings, LLC [Member]",
        "terseLabel": "CG Group Holdings, LLC"
       }
      }
     },
     "localname": "CGGroupHoldingsLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_CHAHoldingsIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "CHA Holdings, Inc.",
        "label": "CHA Holdings, Inc. [Member]",
        "terseLabel": "CHA Holdings, Inc."
       }
      }
     },
     "localname": "CHAHoldingsIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_CRCILonghornHoldingsIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "CRCI Longhorn Holdings, Inc.",
        "label": "CRCI Longhorn Holdings, Inc. [Member]",
        "terseLabel": "CRCI Longhorn Holdings, Inc."
       }
      }
     },
     "localname": "CRCILonghornHoldingsIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_CalabrioIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Calabrio, Inc.",
        "label": "Calabrio, Inc. [Member]",
        "terseLabel": "Calabrio, Inc."
       }
      }
     },
     "localname": "CalabrioIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_CardinalParentIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cardinal Parent, Inc.",
        "label": "Cardinal Parent, Inc. [Member]",
        "terseLabel": "Cardinal Parent, Inc."
       }
      }
     },
     "localname": "CardinalParentIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_CashAndOtherAssets": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cash And Other Assets",
        "label": "Cash And Other Assets",
        "terseLabel": "Cash and other assets"
       }
      }
     },
     "localname": "CashAndOtherAssets",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_CentralSquareTechnologiesLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "CentralSquare Technologies, LLC",
        "label": "CentralSquare Technologies, LLC [Member]",
        "terseLabel": "CentralSquare Technologies, LLC"
       }
      }
     },
     "localname": "CentralSquareTechnologiesLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_CommonStockDividendRatePercentage": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Common Stock, Dividend Rate, Percentage",
        "label": "Common Stock, Dividend Rate, Percentage",
        "terseLabel": "Ordinary shares dividend rate"
       }
      }
     },
     "localname": "CommonStockDividendRatePercentage",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_CommunityBrandsParentCoLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Community Brands ParentCo, LLC",
        "label": "Community Brands ParentCo, LLC [Member]",
        "terseLabel": "Community Brands ParentCo, LLC"
       }
      }
     },
     "localname": "CommunityBrandsParentCoLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_ConsumerProductsSectorMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Consumer Products Sector",
        "label": "Consumer Products Sector [Member]",
        "terseLabel": "Consumer Products"
       }
      }
     },
     "localname": "ConsumerProductsSectorMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_ConsumerServicesSectorMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Consumer Services Sector",
        "label": "Consumer Services Sector [Member]",
        "terseLabel": "Consumer Services"
       }
      }
     },
     "localname": "ConsumerServicesSectorMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_ConveyHealthSolutionsIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Convey Health Solutions, Inc.",
        "label": "Convey Health Solutions, Inc. [Member]",
        "terseLabel": "Convey Health Solutions, Inc."
       }
      }
     },
     "localname": "ConveyHealthSolutionsIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_CoupaHoldingsLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Coupa Holdings, LLC",
        "label": "Coupa Holdings, LLC [Member]",
        "terseLabel": "Coupa Holdings, LLC"
       }
      }
     },
     "localname": "CoupaHoldingsLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_CoyoteBuyerLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Coyote Buyer, LLC",
        "label": "Coyote Buyer, LLC [Member]",
        "terseLabel": "Coyote Buyer, LLC"
       }
      }
     },
     "localname": "CoyoteBuyerLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_DBCreditFacilityMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "DB Credit Facility",
        "label": "DB Credit Facility [Member]",
        "terseLabel": "DB Credit Facility"
       }
      }
     },
     "localname": "DBCreditFacilityMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_DCAInvestmentHoldingLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "DCA Investment Holding, LLC",
        "label": "DCA Investment Holding, LLC [Member]",
        "terseLabel": "DCA Investment Holding, LLC"
       }
      }
     },
     "localname": "DCAInvestmentHoldingLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_DOCSMSOLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "DOCS, MSO, LLC",
        "label": "DOCS, MSO, LLC [Member]",
        "terseLabel": "DOCS, MSO, LLC"
       }
      }
     },
     "localname": "DOCSMSOLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_DaxkoAcquisitionCorporationMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Daxko Acquisition Corporation",
        "label": "Daxko Acquisition Corporation [Member]",
        "terseLabel": "Daxko Acquisition Corporation"
       }
      }
     },
     "localname": "DaxkoAcquisitionCorporationMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_DebtAndEquitySecuritiesRealizedGainLossMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt and Equity Securities, Realized Gain (Loss)",
        "label": "Debt and Equity Securities, Realized Gain (Loss) [Member]",
        "terseLabel": "Net realized gains (losses) on investments"
       }
      }
     },
     "localname": "DebtAndEquitySecuritiesRealizedGainLossMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_DebtAndEquitySecuritiesUnrealizedGainLossMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt and Equity Securities, Unrealized Gain (Loss)",
        "label": "Debt and Equity Securities, Unrealized Gain (Loss) [Member]",
        "terseLabel": "Net change in unrealized appreciation (depreciation)"
       }
      }
     },
     "localname": "DebtAndEquitySecuritiesUnrealizedGainLossMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_DebtInstrumentAnnualChargePercentage": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Instrument, Annual Charge, Percentage",
        "label": "Debt Instrument, Annual Charge, Percentage",
        "terseLabel": "SBA Annual\u00a0Charge"
       }
      }
     },
     "localname": "DebtInstrumentAnnualChargePercentage",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_DebtInstrumentBasisSpreadOnVariableRateIncreaseDuringEventOfDefault": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Instrument, Basis Spread On Variable Rate, Increase During Event Of Default",
        "label": "Debt Instrument, Basis Spread On Variable Rate, Increase During Event Of Default",
        "terseLabel": "Increase in interest rate margin during an event of default"
       }
      }
     },
     "localname": "DebtInstrumentBasisSpreadOnVariableRateIncreaseDuringEventOfDefault",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_DebtInstrumentConvertibleConversionPremium": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Instrument, Convertible Conversion Premium",
        "label": "Debt Instrument, Convertible Conversion Premium",
        "terseLabel": "Conversion premium"
       }
      }
     },
     "localname": "DebtInstrumentConvertibleConversionPremium",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesKeyTermsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_DebtInstrumentConvertibleDividendsInExcessIncrease": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Instrument, Convertible, Dividends In Excess, Increase",
        "label": "Debt Instrument, Convertible, Dividends In Excess, Increase",
        "terseLabel": "Increases in dividend in excess (in dollars per share)"
       }
      }
     },
     "localname": "DebtInstrumentConvertibleDividendsInExcessIncrease",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "nmfc_DebtInstrumentCovenantDebtToEquityRatioMaximum": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Instrument, Covenant, Debt To Equity Ratio, Maximum",
        "label": "Debt Instrument, Covenant, Debt To Equity Ratio, Maximum",
        "terseLabel": "Debt to equity ratio, maximum"
       }
      }
     },
     "localname": "DebtInstrumentCovenantDebtToEquityRatioMaximum",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsGeneralNarrativeDetails"
     ],
     "xbrltype": "pureItemType"
    },
    "nmfc_DebtInstrumentCovenantSecuredDebtRatioMaximum": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Instrument, Covenant, Secured Debt Ratio, Maximum",
        "label": "Debt Instrument, Covenant, Secured Debt Ratio, Maximum",
        "terseLabel": "Maximum secured debt ratio"
       }
      }
     },
     "localname": "DebtInstrumentCovenantSecuredDebtRatioMaximum",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsGeneralNarrativeDetails"
     ],
     "xbrltype": "pureItemType"
    },
    "nmfc_DebtInstrumentRepurchaseAmountPerUSD1000OfPrincipal": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Instrument, Repurchase Amount, Per USD1000 Of Principal",
        "label": "Debt Instrument, Repurchase Amount, Per USD1000 Of Principal",
        "terseLabel": "Purchase amount per $1,000 principal amount"
       }
      }
     },
     "localname": "DebtInstrumentRepurchaseAmountPerUSD1000OfPrincipal",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_DebtInstrumentRepurchaseFaceAmountMaximum": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Instrument, Repurchase Face Amount, Maximum",
        "label": "Debt Instrument, Repurchase Face Amount, Maximum",
        "terseLabel": "Maximum purchase amount"
       }
      }
     },
     "localname": "DebtInstrumentRepurchaseFaceAmountMaximum",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_DebtIssuanceCostsIncurredButNotYetPaid": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Issuance Costs Incurred but Not Yet Paid",
        "label": "Debt Issuance Costs Incurred but Not Yet Paid",
        "terseLabel": "Accrual for deferred financing costs"
       }
      }
     },
     "localname": "DebtIssuanceCostsIncurredButNotYetPaid",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_DebtOutstandingAllowablePerDollarOfEquity": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Outstanding Allowable Per Dollar Of Equity",
        "label": "Debt Outstanding Allowable Per Dollar Of Equity",
        "terseLabel": "Borrowings allowable per dollar of equity"
       }
      }
     },
     "localname": "DebtOutstandingAllowablePerDollarOfEquity",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsGeneralNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_DebtSecuritiesFirstLienMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Securities, First Lien",
        "label": "Debt Securities, First Lien [Member]",
        "terseLabel": "First lien"
       }
      }
     },
     "localname": "DebtSecuritiesFirstLienMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/FairValueFairValueLevelsDetails",
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails",
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails",
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_DebtSecuritiesFixedInterestRateMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Securities, Fixed Interest Rate",
        "label": "Debt Securities, Fixed Interest Rate [Member]",
        "terseLabel": "Fixed rates"
       }
      }
     },
     "localname": "DebtSecuritiesFixedInterestRateMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_DebtSecuritiesFloatingInterestRateMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Securities, Floating Interest Rate",
        "label": "Debt Securities, Floating Interest Rate [Member]",
        "terseLabel": "Floating rates"
       }
      }
     },
     "localname": "DebtSecuritiesFloatingInterestRateMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_DebtSecuritiesSecondLienMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Securities, Second Lien",
        "label": "Debt Securities, Second Lien [Member]",
        "terseLabel": "Second lien"
       }
      }
     },
     "localname": "DebtSecuritiesSecondLienMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/FairValueFairValueLevelsDetails",
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails",
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_DecaDentalHoldingsLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deca Dental Holdings LLC",
        "label": "Deca Dental Holdings LLC [Member]",
        "terseLabel": "Deca Dental Holdings LLC"
       }
      }
     },
     "localname": "DecaDentalHoldingsLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_DiligentCorporationMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Diligent Corporation",
        "label": "Diligent Corporation [Member]",
        "terseLabel": "Diligent Corporation"
       }
      }
     },
     "localname": "DiligentCorporationMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_DividendReinvestmentPlanSharePricePercentageThreshold": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Dividend Reinvestment Plan, Share Price Percentage, Threshold",
        "label": "Dividend Reinvestment Plan, Share Price Percentage, Threshold",
        "terseLabel": "Dividend reinvestment plan, share price percentage, threshold"
       }
      }
     },
     "localname": "DividendReinvestmentPlanSharePricePercentageThreshold",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_DrawnRevolversMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Drawn Revolvers",
        "label": "Drawn Revolvers [Member]",
        "terseLabel": "Drawn revolvers"
       }
      }
     },
     "localname": "DrawnRevolversMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_DrawnRevolvingCreditFacilitiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Drawn Revolving Credit Facilities",
        "label": "Drawn Revolving Credit Facilities [Member]",
        "terseLabel": "Drawn revolving credit facilities"
       }
      }
     },
     "localname": "DrawnRevolvingCreditFacilitiesMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_DuringReinvestmentPeriodMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "During Reinvestment Period",
        "label": "During Reinvestment Period [Member]",
        "terseLabel": "During Reinvestment Period"
       }
      }
     },
     "localname": "DuringReinvestmentPeriodMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_EagleInfrastructureServicesLLCFkaFRArsenalHoldingsIICorpEagleInfrastructureSuperHoldCoLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.), Eagle Infrastructure Super HoldCo, LLC",
        "label": "Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.), Eagle Infrastructure Super HoldCo, LLC [Member]",
        "terseLabel": "Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.) / Eagle Infrastructure Super HoldCo, LLC"
       }
      }
     },
     "localname": "EagleInfrastructureServicesLLCFkaFRArsenalHoldingsIICorpEagleInfrastructureSuperHoldCoLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_EagleInfrastructureServicesLLCFkaFRArsenalHoldingsIICorpMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.)",
        "label": "Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.) [Member]",
        "terseLabel": "Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.)"
       }
      }
     },
     "localname": "EagleInfrastructureServicesLLCFkaFRArsenalHoldingsIICorpMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_EagleInfrastructureSuperHoldCoLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Eagle Infrastructure Super HoldCo, LLC",
        "label": "Eagle Infrastructure Super HoldCo, LLC [Member]",
        "terseLabel": "Eagle Infrastructure Super HoldCo, LLC"
       }
      }
     },
     "localname": "EagleInfrastructureSuperHoldCoLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_EdmentumIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Edmentum Inc.",
        "label": "Edmentum Inc. [Member]",
        "terseLabel": "Edmentum Inc."
       }
      }
     },
     "localname": "EdmentumIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_EducationManagementCorporationMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Education Management Corporation",
        "label": "Education Management Corporation [Member]",
        "terseLabel": "Education Management Corporation"
       }
      }
     },
     "localname": "EducationManagementCorporationMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_EducationManagementIILLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Education Management II LLC",
        "label": "Education Management II LLC [Member]",
        "terseLabel": "Education Management II LLC"
       }
      }
     },
     "localname": "EducationManagementIILLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_EducationSectorMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Education Sector",
        "label": "Education Sector [Member]",
        "terseLabel": "Education"
       }
      }
     },
     "localname": "EducationSectorMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_FSWhiteWaterBorrowerLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "FS WhiteWater Borrower, LLC",
        "label": "FS WhiteWater Borrower, LLC [Member]",
        "terseLabel": "FS WhiteWater Borrower, LLC"
       }
      }
     },
     "localname": "FSWhiteWaterBorrowerLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSalesAndSettlements": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales and Settlements",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales and Settlements",
        "negatedTerseLabel": "Proceeds from sales and paydowns of investments"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSalesAndSettlements",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_FinancingCommitmentLetterToPurchaseInvestmentsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Financing Commitment Letter to Purchase Investments",
        "label": "Financing Commitment Letter to Purchase Investments [Member]",
        "terseLabel": "Financing commitment letter to purchase investments"
       }
      }
     },
     "localname": "FinancingCommitmentLetterToPurchaseInvestmentsMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/CommitmentsandContingenciesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_ForesideFinancialGroupLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Foreside Financial Group, LLC",
        "label": "Foreside Financial Group, LLC [Member]",
        "terseLabel": "Foreside Financial Group, LLC"
       }
      }
     },
     "localname": "ForesideFinancialGroupLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_FortisSolutionsGroupLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fortis Solutions Group, LLC",
        "label": "Fortis Solutions Group, LLC [Member]",
        "terseLabel": "Fortis Solutions Group, LLC"
       }
      }
     },
     "localname": "FortisSolutionsGroupLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_FoundationalEducationGroupIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Foundational Education Group, Inc.",
        "label": "Foundational Education Group, Inc. [Member]",
        "terseLabel": "Foundational Education Group, Inc."
       }
      }
     },
     "localname": "FoundationalEducationGroupIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_FundedDebtSecuritiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Funded Debt Securities",
        "label": "Funded Debt Securities [Member]",
        "terseLabel": "Funded Debt Investments"
       }
      }
     },
     "localname": "FundedDebtSecuritiesMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_FundedSecuritiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Funded Securities",
        "label": "Funded Securities [Member]",
        "terseLabel": "Funded Investments"
       }
      }
     },
     "localname": "FundedSecuritiesMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_GCWavesHoldingsIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "GC Waves Holdings, Inc.",
        "label": "GC Waves Holdings, Inc. [Member]",
        "terseLabel": "GC Waves Holdings, Inc."
       }
      }
     },
     "localname": "GCWavesHoldingsIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_GSAcquisitioncoIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "GS Acquisitionco, Inc",
        "label": "GS Acquisitionco, Inc [Member]",
        "terseLabel": "GS Acquisitionco, Inc"
       }
      }
     },
     "localname": "GSAcquisitioncoIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_GranicusIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Granicus, Inc.",
        "label": "Granicus, Inc. [Member]",
        "terseLabel": "Granicus, Inc."
       }
      }
     },
     "localname": "GranicusIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_GroundworksLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Groundworks, LLC",
        "label": "Groundworks, LLC [Member]",
        "terseLabel": "Groundworks, LLC"
       }
      }
     },
     "localname": "GroundworksLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_GuaranteedDebt": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 3.0,
       "parentTag": "us-gaap_LongTermDebt",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Guaranteed Debt",
        "label": "Guaranteed Debt",
        "terseLabel": "SBA-guaranteed debentures",
        "verboseLabel": "SBA-guaranteed debentures outstanding"
       }
      }
     },
     "localname": "GuaranteedDebt",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_GuaranteedDebtCommitmentFee": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Guaranteed Debt, Commitment Fee",
        "label": "Guaranteed Debt, Commitment Fee",
        "terseLabel": "Commitment fee percentage"
       }
      }
     },
     "localname": "GuaranteedDebtCommitmentFee",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails"
     ],
     "xbrltype": "pureItemType"
    },
    "nmfc_GuaranteedDebtIssuanceDiscount": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Guaranteed Debt, Issuance Discount",
        "label": "Guaranteed Debt, Issuance Discount",
        "terseLabel": "Issuance discount percentage"
       }
      }
     },
     "localname": "GuaranteedDebtIssuanceDiscount",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails"
     ],
     "xbrltype": "pureItemType"
    },
    "nmfc_GuaranteedDebtMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Guaranteed Debt",
        "label": "Guaranteed Debt [Member]",
        "terseLabel": "SBA-guaranteed debentures"
       }
      }
     },
     "localname": "GuaranteedDebtMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebentureOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails",
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_GuaranteedDebtUpfrontFees": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Guaranteed Debt, Upfront Fees",
        "label": "Guaranteed Debt, Upfront Fees",
        "terseLabel": "Upfront fees percentage"
       }
      }
     },
     "localname": "GuaranteedDebtUpfrontFees",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails"
     ],
     "xbrltype": "pureItemType"
    },
    "nmfc_HSPurchaserLLCHelpSystemsHoldingsIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "HS Purchaser, LLC / Help/Systems Holdings, Inc.",
        "label": "HS Purchaser, LLC / Help/Systems Holdings, Inc. [Member]",
        "terseLabel": "HS Purchaser, LLC / Help/Systems Holdings, Inc."
       }
      }
     },
     "localname": "HSPurchaserLLCHelpSystemsHoldingsIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_HavenMidstreamHoldingsLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Haven Midstream Holdings LLC",
        "label": "Haven Midstream Holdings LLC [Member]",
        "terseLabel": "Haven Midstream Holdings LLC"
       }
      }
     },
     "localname": "HavenMidstreamHoldingsLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_HavenMidstreamLLCAndHavenMidstreamHoldingsLLCAndQIDTRHHoldingsLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Haven Midstream LLC And Haven Midstream Holdings LLC And QID TRH Holdings LLC",
        "label": "Haven Midstream LLC And Haven Midstream Holdings LLC And QID TRH Holdings LLC [Member]",
        "terseLabel": "Haven Midstream LLC / Haven Midstream Holdings LLC / QID TRH Holdings LLC"
       }
      }
     },
     "localname": "HavenMidstreamLLCAndHavenMidstreamHoldingsLLCAndQIDTRHHoldingsLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_HoldingsCreditFacilityBroadlySyndicatedLoansMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Holdings Credit Facility, Broadly Syndicated Loans",
        "label": "Holdings Credit Facility, Broadly Syndicated Loans [Member]",
        "terseLabel": "Holdings Credit Facility, Broadly Syndicated Loans"
       }
      }
     },
     "localname": "HoldingsCreditFacilityBroadlySyndicatedLoansMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_HoldingsCreditFacilityExcludingBroadlySyndicatedLoansMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Holdings Credit Facility, Excluding Broadly Syndicated Loans",
        "label": "Holdings Credit Facility, Excluding Broadly Syndicated Loans [Member]",
        "terseLabel": "Holdings Credit Facility, Excluding Broadly Syndicated Loans"
       }
      }
     },
     "localname": "HoldingsCreditFacilityExcludingBroadlySyndicatedLoansMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_HoldingsCreditFacilityMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Holdings Credit Facility",
        "label": "Holdings Credit Facility [Member]",
        "terseLabel": "Holdings Credit Facility"
       }
      }
     },
     "localname": "HoldingsCreditFacilityMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_ICIMSIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "iCIMS, Inc.",
        "label": "iCIMS, Inc. [Member]",
        "terseLabel": "iCIMS, Inc."
       }
      }
     },
     "localname": "ICIMSIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_IGInvestmentsHoldingsLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "IG Investments Holdings, LLC",
        "label": "IG Investments Holdings, LLC [Member]",
        "terseLabel": "IG Investments Holdings, LLC"
       }
      }
     },
     "localname": "IGInvestmentsHoldingsLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_IMOInvestorHoldingsIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "IMO Investor Holdings, Inc.",
        "label": "IMO Investor Holdings, Inc. [Member]",
        "terseLabel": "IMO Investor Holdings, Inc."
       }
      }
     },
     "localname": "IMOInvestorHoldingsIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_IderaIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Idera, Inc.",
        "label": "Idera, Inc. [Member]",
        "terseLabel": "Idera, Inc."
       }
      }
     },
     "localname": "IderaIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_IncreaseDecreaseInDeferredIncomeTaxLiability": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 22.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Increase (Decrease) In Deferred Income Tax Liability",
        "label": "Increase (Decrease) In Deferred Income Tax Liability",
        "terseLabel": "Deferred tax liability"
       }
      }
     },
     "localname": "IncreaseDecreaseInDeferredIncomeTaxLiability",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_IndustryConcentrationRiskMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Industry Concentration Risk",
        "label": "Industry Concentration Risk [Member]",
        "terseLabel": "Industry\u00a0Type"
       }
      }
     },
     "localname": "IndustryConcentrationRiskMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InfogainCorporationMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Infogain Corporation",
        "label": "Infogain Corporation [Member]",
        "terseLabel": "Infogain Corporation"
       }
      }
     },
     "localname": "InfogainCorporationMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_IntegroParentIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Integro Parent Inc.",
        "label": "Integro Parent Inc. [Member]",
        "terseLabel": "Integro Parent Inc."
       }
      }
     },
     "localname": "IntegroParentIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InterestRateTypeRiskMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Interest Rate Type Risk",
        "label": "Interest Rate Type Risk [Member]",
        "terseLabel": "Interest\u00a0Rate\u00a0Type"
       }
      }
     },
     "localname": "InterestRateTypeRiskMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InvestmentCompanyCapitalTransactionsIncreaseDecrease": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets": {
       "order": 2.0,
       "parentTag": "us-gaap_StockholdersEquityPeriodIncreaseDecrease",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Company, Capital Transactions, Increase (Decrease)",
        "label": "Investment Company, Capital Transactions, Increase (Decrease)",
        "totalLabel": "Total net decrease in net assets resulting from capital transactions"
       }
      }
     },
     "localname": "InvestmentCompanyCapitalTransactionsIncreaseDecrease",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_InvestmentCompanyContractualFeeWaivedManagementFee": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/AgreementsManagementFeesandIncentiveFeesDetails": {
       "order": 2.0,
       "parentTag": "nmfc_InvestmentCompanyManagementFeeExpenseAfterReductionOfFeeWaiver",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Company, Contractual Fee Waived, Management Fee",
        "label": "Investment Company, Contractual Fee Waived, Management Fee",
        "negatedLabel": "Less: management fee waiver",
        "terseLabel": "Management fees waived"
       }
      }
     },
     "localname": "InvestmentCompanyContractualFeeWaivedManagementFee",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsManagementFeesandIncentiveFeesDetails",
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_InvestmentCompanyExpenseRatioBeforeFeeWaiverAndReimbursements": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Company, Expense Ratio Before Fee Waiver And Reimbursements",
        "label": "Investment Company, Expense Ratio Before Fee Waiver And Reimbursements",
        "terseLabel": "Total expenses, before waivers/reimbursements"
       }
      }
     },
     "localname": "InvestmentCompanyExpenseRatioBeforeFeeWaiverAndReimbursements",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_InvestmentCompanyExpenseRatioIncludingFeeWaiverAndReimbursements": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Company, Expense Ratio Including Fee Waiver And Reimbursements",
        "label": "Investment Company, Expense Ratio Including Fee Waiver And Reimbursements",
        "terseLabel": "Total expenses, net of waivers/reimbursements"
       }
      }
     },
     "localname": "InvestmentCompanyExpenseRatioIncludingFeeWaiverAndReimbursements",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_InvestmentCompanyFeeReimbursementToGrossAssets": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Company, Fee Reimbursement To Gross Assets",
        "label": "Investment Company, Fee Reimbursement To Gross Assets",
        "terseLabel": "Reimbursements to administrators as a percentage of gross assets"
       }
      }
     },
     "localname": "InvestmentCompanyFeeReimbursementToGrossAssets",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_InvestmentCompanyManagementFeeExpenseAfterReductionOfFeeWaiver": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/AgreementsManagementFeesandIncentiveFeesDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Company, Management Fee Expense, After Reduction Of Fee Waiver",
        "label": "Investment Company, Management Fee Expense, After Reduction Of Fee Waiver",
        "totalLabel": "Total management fee"
       }
      }
     },
     "localname": "InvestmentCompanyManagementFeeExpenseAfterReductionOfFeeWaiver",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsManagementFeesandIncentiveFeesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_InvestmentCompanyNetAssetsTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Company, Net Assets",
        "label": "Investment Company, Net Assets [Text Block]",
        "terseLabel": "Net Assets"
       }
      }
     },
     "localname": "InvestmentCompanyNetAssetsTextBlock",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssets"
     ],
     "xbrltype": "textBlockItemType"
    },
    "nmfc_InvestmentCompanyNonconsolidatedSubsidiaryInvestmentExtensionPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Company, Nonconsolidated Subsidiary, Investment Extension Period",
        "label": "Investment Company, Nonconsolidated Subsidiary, Investment Extension Period",
        "terseLabel": "Investment extension period"
       }
      }
     },
     "localname": "InvestmentCompanyNonconsolidatedSubsidiaryInvestmentExtensionPeriod",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "nmfc_InvestmentCompanyNonconsolidatedSubsidiaryInvestmentPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Company, Nonconsolidated Subsidiary, Investment Period",
        "label": "Investment Company, Nonconsolidated Subsidiary, Investment Period",
        "terseLabel": "Investment period"
       }
      }
     },
     "localname": "InvestmentCompanyNonconsolidatedSubsidiaryInvestmentPeriod",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "nmfc_InvestmentCompanyNumberOfInvestmentsHeld": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Company, Number Of Investments Held",
        "label": "Investment Company, Number Of Investments Held",
        "terseLabel": "Number of investments held"
       }
      }
     },
     "localname": "InvestmentCompanyNumberOfInvestmentsHeld",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "integerItemType"
    },
    "nmfc_InvestmentCompanyNumberOfPortfolioCompanies": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Company, Number Of Portfolio Companies",
        "label": "Investment Company, Number Of Portfolio Companies",
        "terseLabel": "Number of portfolio companies"
       }
      }
     },
     "localname": "InvestmentCompanyNumberOfPortfolioCompanies",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "nmfc_InvestmentCompanyPerShareDataAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Company, Per Share Data",
        "label": "Investment Company, Per Share Data [Abstract]",
        "terseLabel": "Per share data:"
       }
      }
     },
     "localname": "InvestmentCompanyPerShareDataAbstract",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "nmfc_InvestmentCompanyRatioToAverageNetAssetsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Company, Ratio To Average Net Assets",
        "label": "Investment Company, Ratio To Average Net Assets [Abstract]",
        "terseLabel": "Ratio to average net assets:"
       }
      }
     },
     "localname": "InvestmentCompanyRatioToAverageNetAssetsAbstract",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "nmfc_InvestmentCompanyRedemptionOfSharesPaidInKind": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Company, Redemption of Shares, Paid-In-Kind",
        "label": "Investment Company, Redemption of Shares, Paid-In-Kind",
        "terseLabel": "Redemption of shares paid-in-kind"
       }
      }
     },
     "localname": "InvestmentCompanyRedemptionOfSharesPaidInKind",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_InvestmentFundsIncludingInvestmentsInJointVenturesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Funds, Including Investments In Joint Ventures",
        "label": "Investment Funds, Including Investments In Joint Ventures [Member]",
        "terseLabel": "Investment Funds (includes investments in joint ventures)"
       }
      }
     },
     "localname": "InvestmentFundsIncludingInvestmentsInJointVenturesMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InvestmentManagementAgreementAnnualizedCatchUpThresholdMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Management Agreement, Annualized Catch-Up Threshold",
        "label": "Investment Management Agreement, Annualized Catch-Up Threshold [Member]",
        "terseLabel": "Annualized catch-up threshold"
       }
      }
     },
     "localname": "InvestmentManagementAgreementAnnualizedCatchUpThresholdMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InvestmentManagementAgreementAnnualizedHurdleRateMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Management Agreement, Annualized Hurdle Rate",
        "label": "Investment Management Agreement, Annualized Hurdle Rate [Member]",
        "terseLabel": "Annualized hurdle rate"
       }
      }
     },
     "localname": "InvestmentManagementAgreementAnnualizedHurdleRateMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InvestmentManagementAgreementMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Management Agreement",
        "label": "Investment Management Agreement [Member]",
        "terseLabel": "Investment Management Agreement"
       }
      }
     },
     "localname": "InvestmentManagementAgreementMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InvestmentManagementAgreementPreIncentiveFeeNetInvestmentIncomeBelowCatchUpThresholdMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Management Agreement, Pre-Incentive Fee Net Investment Income Below Catch-Up Threshold",
        "label": "Investment Management Agreement, Pre-Incentive Fee Net Investment Income Below Catch-Up Threshold [Member]",
        "terseLabel": "Pre-Incentive Fee Net Investment Income below catch-up threshold"
       }
      }
     },
     "localname": "InvestmentManagementAgreementPreIncentiveFeeNetInvestmentIncomeBelowCatchUpThresholdMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InvestmentManagementAgreementPreIncentiveFeeNetInvestmentIncomeExceedsCatchUpThresholdMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Management Agreement, Pre-Incentive Fee Net Investment Income Exceeds Catch-Up Threshold",
        "label": "Investment Management Agreement, Pre-Incentive Fee Net Investment Income Exceeds Catch-Up Threshold [Member]",
        "terseLabel": "Pre-Incentive Fee Net Investment Income exceeds catch-up threshold"
       }
      }
     },
     "localname": "InvestmentManagementAgreementPreIncentiveFeeNetInvestmentIncomeExceedsCatchUpThresholdMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InvestmentManagementAgreementPreIncentiveFeeNetInvestmentIncomeMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Management Agreement, Pre-Incentive Fee Net Investment Income",
        "label": "Investment Management Agreement, Pre-Incentive Fee Net Investment Income [Member]",
        "terseLabel": "Pre-Incentive Fee Net Investment Income",
        "verboseLabel": "Incentive fee, excluding accrued capital gains incentive fees"
       }
      }
     },
     "localname": "InvestmentManagementAgreementPreIncentiveFeeNetInvestmentIncomeMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsManagementFeesandIncentiveFeesDetails",
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InvestmentManagementAgreementQuarterlyCatchUpThresholdMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Management Agreement, Quarterly Catch-Up Threshold",
        "label": "Investment Management Agreement, Quarterly Catch-Up Threshold [Member]",
        "terseLabel": "Quarterly catch-up threshold"
       }
      }
     },
     "localname": "InvestmentManagementAgreementQuarterlyCatchUpThresholdMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InvestmentManagementAgreementQuarterlyHurdleRateMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Management Agreement, Quarterly Hurdle Rate",
        "label": "Investment Management Agreement, Quarterly Hurdle Rate [Member]",
        "terseLabel": "Quarterly hurdle rate"
       }
      }
     },
     "localname": "InvestmentManagementAgreementQuarterlyHurdleRateMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InvestmentManagementAgreementRealizedCapitalGainsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Management Agreement , Realized Capital Gains",
        "label": "Investment Management Agreement , Realized Capital Gains [Member]",
        "terseLabel": "Realized capital gains",
        "verboseLabel": "Accrued capital gains incentive fees"
       }
      }
     },
     "localname": "InvestmentManagementAgreementRealizedCapitalGainsMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsManagementFeesandIncentiveFeesDetails",
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InvestmentOwnedAtFairValueNonQualifyingAssetsPercentOfTotalAssets": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Owned, At Fair Value, Non-Qualifying Assets, Percent Of Total Assets",
        "label": "Investment Owned, At Fair Value, Non-Qualifying Assets, Percent Of Total Assets",
        "terseLabel": "Investments at fair value that are non-qualifying assets as a percentage of total assets"
       }
      }
     },
     "localname": "InvestmentOwnedAtFairValueNonQualifyingAssetsPercentOfTotalAssets",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_InvestmentOwnedBalanceRepurchaseAmount": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Owned, Balance, Repurchase Amount",
        "label": "Investment Owned, Balance, Repurchase Amount",
        "terseLabel": "Repurchase amount"
       }
      }
     },
     "localname": "InvestmentOwnedBalanceRepurchaseAmount",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_InvestmentOwnedFairValueMeasurementInput": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Owned, Fair Value, Measurement Input",
        "label": "Investment Owned, Fair Value, Measurement Input",
        "terseLabel": "Measurement Input"
       }
      }
     },
     "localname": "InvestmentOwnedFairValueMeasurementInput",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "decimalItemType"
    },
    "nmfc_InvestmentOwnedNonaccrualNumberOfInvestments": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Owned, Nonaccrual, Number Of Investments",
        "label": "Investment Owned, Nonaccrual, Number Of Investments",
        "terseLabel": "Number of investments on non-accrual"
       }
      }
     },
     "localname": "InvestmentOwnedNonaccrualNumberOfInvestments",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "nmfc_InvestmentOwnedNonaccrualThresholdPeriodPastDue": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Owned, Nonaccrual, Threshold Period Past Due,",
        "label": "Investment Owned, Nonaccrual, Threshold Period Past Due,",
        "terseLabel": "Investments threshold period past due for nonaccrual status"
       }
      }
     },
     "localname": "InvestmentOwnedNonaccrualThresholdPeriodPastDue",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "nmfc_InvestmentOwnedRecognizedUnrealizedAppreciationDepreciationNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Owned, Recognized Unrealized Appreciation (Depreciation), Net",
        "label": "Investment Owned, Recognized Unrealized Appreciation (Depreciation), Net [Abstract]",
        "terseLabel": "Net change in unrealized appreciation (depreciation):"
       }
      }
     },
     "localname": "InvestmentOwnedRecognizedUnrealizedAppreciationDepreciationNetAbstract",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "stringItemType"
    },
    "nmfc_InvestmentOwnedSharesRedeemed": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Owned, Shares Redeemed",
        "label": "Investment Owned, Shares Redeemed",
        "terseLabel": "Shares redeemed for a promissory note (in shares)"
       }
      }
     },
     "localname": "InvestmentOwnedSharesRedeemed",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "nmfc_InvestmentOwnedUnearnedDividendIncome": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Owned, Unearned Dividend Income",
        "label": "Investment Owned, Unearned Dividend Income",
        "terseLabel": "Unearned dividend income"
       }
      }
     },
     "localname": "InvestmentOwnedUnearnedDividendIncome",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_InvestmentOwnedUnearnedInterestIncome": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Owned, Unearned Interest Income",
        "label": "Investment Owned, Unearned Interest Income",
        "terseLabel": "Unearned interest income"
       }
      }
     },
     "localname": "InvestmentOwnedUnearnedInterestIncome",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_InvestmentTypeConcentrationRiskMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Type Concentration Risk",
        "label": "Investment Type Concentration Risk [Member]",
        "terseLabel": "Investment\u00a0Type"
       }
      }
     },
     "localname": "InvestmentTypeConcentrationRiskMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InvestmentsAtFairValueMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investments, At Fair Value",
        "label": "Investments, At Fair Value [Member]",
        "terseLabel": "Investments at fair value"
       }
      }
     },
     "localname": "InvestmentsAtFairValueMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InvestmentsExcludingDrawnRevolversMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investments Excluding Drawn Revolvers",
        "label": "Investments Excluding Drawn Revolvers [Member]",
        "terseLabel": "Investments excluding drawn revolvers"
       }
      }
     },
     "localname": "InvestmentsExcludingDrawnRevolversMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_InvestmentsIncludingDelayedDrawFacilitiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investments Including Delayed Draw Facilities",
        "label": "Investments Including Delayed Draw Facilities [Member]",
        "terseLabel": "Investments including delayed draw facilities"
       }
      }
     },
     "localname": "InvestmentsIncludingDelayedDrawFacilitiesMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_KAMCHoldingsIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "KAMC Holdings, Inc",
        "label": "KAMC Holdings, Inc [Member]",
        "terseLabel": "KAMC Holdings, Inc"
       }
      }
     },
     "localname": "KAMCHoldingsIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_KPSKYAcquisitionIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "KPSKY Acquisition Inc.",
        "label": "KPSKY Acquisition Inc. [Member]",
        "terseLabel": "KPSKY Acquisition Inc."
       }
      }
     },
     "localname": "KPSKYAcquisitionIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_KaseyaIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Kaseya Inc",
        "label": "Kaseya Inc [Member]",
        "terseLabel": "Kaseya Inc"
       }
      }
     },
     "localname": "KaseyaIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_KnockoutIntermediateHoldingsIIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Knockout Intermediate Holdings I Inc.",
        "label": "Knockout Intermediate Holdings I Inc. [Member]",
        "terseLabel": "Knockout Intermediate Holdings I Inc."
       }
      }
     },
     "localname": "KnockoutIntermediateHoldingsIIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_LenderCostOfFundsRateMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Lender Cost Of Funds Rate",
        "label": "Lender Cost Of Funds Rate [Member]",
        "terseLabel": "Lender Cost Of Funds Rate"
       }
      }
     },
     "localname": "LenderCostOfFundsRateMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_LineOfCreditFacilityAgentFeePercentage": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line Of Credit Facility, Agent Fee, Percentage",
        "label": "Line Of Credit Facility, Agent Fee, Percentage",
        "terseLabel": "Agent fee percentage"
       }
      }
     },
     "localname": "LineOfCreditFacilityAgentFeePercentage",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_LineOfCreditFacilityBorrowingCapacityFirstPercentage": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line Of Credit Facility, Borrowing Capacity, First Percentage",
        "label": "Line Of Credit Facility, Borrowing Capacity, First Percentage",
        "terseLabel": "Borrowing capacity, first percentage"
       }
      }
     },
     "localname": "LineOfCreditFacilityBorrowingCapacityFirstPercentage",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_LineOfCreditFacilityBorrowingCapacityFourthPercentage": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line Of Credit Facility, Borrowing Capacity, Fourth Percentage",
        "label": "Line Of Credit Facility, Borrowing Capacity, Fourth Percentage",
        "terseLabel": "Borrowing capacity, fourth percentage"
       }
      }
     },
     "localname": "LineOfCreditFacilityBorrowingCapacityFourthPercentage",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_LineOfCreditFacilityBorrowingCapacitySecondPercentage": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line Of Credit Facility, Borrowing Capacity, Second Percentage",
        "label": "Line Of Credit Facility, Borrowing Capacity, Second Percentage",
        "terseLabel": "Borrowing capacity, second percentage"
       }
      }
     },
     "localname": "LineOfCreditFacilityBorrowingCapacitySecondPercentage",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_LineOfCreditFacilityBorrowingCapacityThirdPercentage": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line Of Credit Facility, Borrowing Capacity, Third Percentage",
        "label": "Line Of Credit Facility, Borrowing Capacity, Third Percentage",
        "terseLabel": "Borrowing capacity, third percentage"
       }
      }
     },
     "localname": "LineOfCreditFacilityBorrowingCapacityThirdPercentage",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_LondonInterbankOfferedRateLIBOROrSterlingOvernightInterbankAverageRateSONIAOrEuroInterbankOfferedRateEURIBORMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "London Interbank Offered Rate (LIBOR) Or Sterling Overnight Interbank Average Rate (SONIA) Or Euro Interbank Offered Rate (EURIBOR)",
        "label": "London Interbank Offered Rate (LIBOR) Or Sterling Overnight Interbank Average Rate (SONIA) Or Euro Interbank Offered Rate (EURIBOR) [Member]",
        "terseLabel": "LIBOR, SONIA or EURIBOR"
       }
      }
     },
     "localname": "LondonInterbankOfferedRateLIBOROrSterlingOvernightInterbankAverageRateSONIAOrEuroInterbankOfferedRateEURIBORMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_MRISoftwareLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "MRI Software LLC",
        "label": "MRI Software LLC [Member]",
        "terseLabel": "MRI Software LLC"
       }
      }
     },
     "localname": "MRISoftwareLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_ManagementAndServiceFeesBaseRateTargetUnderWaiverAgreement": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Management And Service Fees, Base Rate, Target Under Waiver Agreement",
        "label": "Management And Service Fees, Base Rate, Target Under Waiver Agreement",
        "terseLabel": "Reduced base management fee percentage"
       }
      }
     },
     "localname": "ManagementAndServiceFeesBaseRateTargetUnderWaiverAgreement",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_ManagementAndServiceFeesIncentiveRateNumberOfComponents": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Management And Service Fees, Incentive Rate, Number Of Components",
        "label": "Management And Service Fees, Incentive Rate, Number Of Components",
        "terseLabel": "Number of incentive fee components"
       }
      }
     },
     "localname": "ManagementAndServiceFeesIncentiveRateNumberOfComponents",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "nmfc_ManagementAndServiceFeesNumberOfComponents": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Management And Service Fees, Number Of Components",
        "label": "Management And Service Fees, Number Of Components",
        "terseLabel": "Number of fee components"
       }
      }
     },
     "localname": "ManagementAndServiceFeesNumberOfComponents",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "nmfc_NMAPPCanadaCorpMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NM APP Canada, Corp",
        "label": "NM APP Canada, Corp [Member]",
        "terseLabel": "NM APP CANADA CORP"
       }
      }
     },
     "localname": "NMAPPCanadaCorpMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NMAPPUSLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NM APP US LLC",
        "label": "NM APP US LLC [Member]",
        "terseLabel": "NM APP US LLC"
       }
      }
     },
     "localname": "NMAPPUSLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NMCCrimsonHoldingsIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NMC Crimson Holdings, Inc.",
        "label": "NMC Crimson Holdings, Inc. [Member]",
        "terseLabel": "NMC Crimson Holdings, Inc."
       }
      }
     },
     "localname": "NMCCrimsonHoldingsIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NMCLFXLPMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NM CLFX LP",
        "label": "NM CLFX LP [Member]",
        "terseLabel": "NM CLFX LP"
       }
      }
     },
     "localname": "NMCLFXLPMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesSummaryofPropertiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NMDRVTLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NM DRVT LLC",
        "label": "NM DRVT LLC [Member]",
        "terseLabel": "NM DRVT LLC"
       }
      }
     },
     "localname": "NMDRVTLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NMFCCreditFacilityMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NMFC Credit Facility",
        "label": "NMFC Credit Facility [Member]",
        "terseLabel": "NMFC Credit Facility"
       }
      }
     },
     "localname": "NMFCCreditFacilityMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NMFCSeniorLoanProgramIIILLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NMFC Senior Loan Program III\u00a0LLC",
        "label": "NMFC Senior Loan Program III\u00a0LLC [Member]",
        "terseLabel": "SLP III",
        "verboseLabel": "NMFC Senior Loan Program III LLC"
       }
      }
     },
     "localname": "NMFCSeniorLoanProgramIIILLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NMFCSeniorLoanProgramIVLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NMFC Senior Loan Program IV\u00a0LLC",
        "label": "NMFC Senior Loan Program IV\u00a0LLC [Member]",
        "terseLabel": "SLP IV",
        "verboseLabel": "NMFC Senior Loan Program IV LLC"
       }
      }
     },
     "localname": "NMFCSeniorLoanProgramIVLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NMGLCRLPMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NM GLCR LP",
        "label": "NM GLCR LP [Member]",
        "terseLabel": "NM GLCR LP"
       }
      }
     },
     "localname": "NMGLCRLPMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NMGPHoldcoLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NM GP Holdco, LLC",
        "label": "NM GP Holdco, LLC [Member]",
        "terseLabel": "NM GP Holdco, LLC"
       }
      }
     },
     "localname": "NMGPHoldcoLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NMJRALLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NM JRA LLC",
        "label": "NM JRA LLC [Member]",
        "terseLabel": "NM JRA LLC"
       }
      }
     },
     "localname": "NMJRALLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NMKRLNLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NM KRLN LLC",
        "label": "NM KRLN LLC [Member]",
        "terseLabel": "NM KRLN LLC"
       }
      }
     },
     "localname": "NMKRLNLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NMNLCCreditFacilityIIMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NMNLC Credit Facility II",
        "label": "NMNLC Credit Facility II [Member]",
        "terseLabel": "NMNLC Credit Facility II"
       }
      }
     },
     "localname": "NMNLCCreditFacilityIIMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NMNLHoldingsLPMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NM NL Holdings, L.P.",
        "label": "NM NL Holdings, L.P. [Member]",
        "terseLabel": "NM NL Holdings, L.P."
       }
      }
     },
     "localname": "NMNLHoldingsLPMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NMNLHoldingsLPNMGPHoldcoLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NM NL Holdings LP / NM GP Holdco LLC",
        "label": "NM NL Holdings LP / NM GP Holdco LLC [Member]",
        "terseLabel": "NM NL Holdings LP / NM GP Holdco LLC"
       }
      }
     },
     "localname": "NMNLHoldingsLPNMGPHoldcoLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesSummaryofPropertiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NMYILLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NM YI LLC",
        "label": "NM YI LLC [Member]",
        "terseLabel": "NM YI, LLC",
        "verboseLabel": "NM YI LLC"
       }
      }
     },
     "localname": "NMYILLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesSummaryofPropertiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NationalHMEIncAndNHMEHoldingsCorpMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "National HME, Inc. And NHME Holdings Corp.",
        "label": "National HME, Inc. And NHME Holdings Corp. [Member]",
        "terseLabel": "National HME, Inc./NHME Holdings Corp."
       }
      }
     },
     "localname": "NationalHMEIncAndNHMEHoldingsCorpMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NationalHMEIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "National HME, Inc.",
        "label": "National HME, Inc. [Member]",
        "terseLabel": "National HME, Inc."
       }
      }
     },
     "localname": "NationalHMEIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NetRealizedGainsLossesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Net Realized Gains (Losses)",
        "label": "Net Realized Gains (Losses) [Abstract]",
        "terseLabel": "Net realized gains (losses):"
       }
      }
     },
     "localname": "NetRealizedGainsLossesAbstract",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "stringItemType"
    },
    "nmfc_NewBenevisHoldcoIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "New Benevis Holdco, Inc.",
        "label": "New Benevis Holdco, Inc. [Member]",
        "terseLabel": "New Benevis Holdco, Inc."
       }
      }
     },
     "localname": "NewBenevisHoldcoIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NewBenevisTopcoLLCAndNewBenevisHoldcoIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "New Benevis Topco, LLC And New Benevis Holdco, Inc.",
        "label": "New Benevis Topco, LLC And New Benevis Holdco, Inc. [Member]",
        "terseLabel": "New Benevis Topco, LLC / New Benevis Holdco, Inc."
       }
      }
     },
     "localname": "NewBenevisTopcoLLCAndNewBenevisHoldcoIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NewBenevisTopcoLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "New Benevis Topco, LLC",
        "label": "New Benevis Topco, LLC [Member]",
        "terseLabel": "New Benevis Topco, LLC"
       }
      }
     },
     "localname": "NewBenevisTopcoLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NewMountainFinanceSBICIILPMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "New Mountain Finance SBIC II, L.P.",
        "label": "New Mountain Finance SBIC II, L.P. [Member]",
        "terseLabel": "SBIC II"
       }
      }
     },
     "localname": "NewMountainFinanceSBICIILPMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NewMountainFinanceSBICLPMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "New Mountain Finance SBIC, L.P.",
        "label": "New Mountain Finance SBIC, L.P. [Member]",
        "terseLabel": "SBIC I"
       }
      }
     },
     "localname": "NewMountainFinanceSBICLPMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NewMountainNetLeaseCorporationAndNMCLFXLPMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "New Mountain Net Lease Corporation And NM CLFX LP",
        "label": "New Mountain Net Lease Corporation And NM CLFX LP [Member]",
        "terseLabel": "NMNLC And NM CLFX LP"
       }
      }
     },
     "localname": "NewMountainNetLeaseCorporationAndNMCLFXLPMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NewMountainNetLeaseCorporationMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "New Mountain Net Lease Corporation",
        "label": "New Mountain Net Lease Corporation [Member]",
        "terseLabel": "New Mountain Net Lease Corporation",
        "verboseLabel": "NMNLC"
       }
      }
     },
     "localname": "NewMountainNetLeaseCorporationMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesSummaryofPropertiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NewPermianHoldcoIncAndNewPermianHoldcoLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "New Permian Holdco, Inc. And New Permian Holdco, L.L.C.",
        "label": "New Permian Holdco, Inc. And New Permian Holdco, L.L.C. [Member]",
        "terseLabel": "New Permian Holdco, Inc. / New Permian Holdco, L.L.C."
       }
      }
     },
     "localname": "NewPermianHoldcoIncAndNewPermianHoldcoLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NewPermianHoldcoLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "New Permian Holdco, L.L.C.",
        "label": "New Permian Holdco, L.L.C. [Member]",
        "terseLabel": "New Permian Holdco, L.L.C."
       }
      }
     },
     "localname": "NewPermianHoldcoLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NonCashOperatingAndInvestingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Non Cash Operating And Investing Activities",
        "label": "Non Cash Operating And Investing Activities [Abstract]",
        "terseLabel": "Non-cash operating activities:"
       }
      }
     },
     "localname": "NonCashOperatingAndInvestingActivitiesAbstract",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "nmfc_NoncashActivityOnInvestments": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Noncash Activity On Investments",
        "label": "Noncash Activity On Investments",
        "terseLabel": "Non-cash activity on investments"
       }
      }
     },
     "localname": "NoncashActivityOnInvestments",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_NoncashFinancingItemsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Noncash Financing Items",
        "label": "Noncash Financing Items [Abstract]",
        "terseLabel": "Non-cash financing activities:"
       }
      }
     },
     "localname": "NoncashFinancingItemsAbstract",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "nmfc_NotoriousTopcoLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Notorious Topco, LLC",
        "label": "Notorious Topco, LLC [Member]",
        "terseLabel": "Notorious Topco, LLC"
       }
      }
     },
     "localname": "NotoriousTopcoLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_NumberOfCollateralizedAgreements": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number Of Collateralized Agreements",
        "label": "Number Of Collateralized Agreements",
        "terseLabel": "Number of collateralized agreements"
       }
      }
     },
     "localname": "NumberOfCollateralizedAgreements",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "nmfc_OABuyerIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "OA Buyer, Inc.",
        "label": "OA Buyer, Inc. [Member]",
        "terseLabel": "OA Buyer, Inc."
       }
      }
     },
     "localname": "OABuyerIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_OEConnectionLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "OEConnection LLC",
        "label": "OEConnection LLC [Member]",
        "terseLabel": "OEConnection LLC"
       }
      }
     },
     "localname": "OEConnectionLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_OranjeHoldcoIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Oranje Holdco, Inc.",
        "label": "Oranje Holdco, Inc. [Member]",
        "terseLabel": "Oranje Holdco, Inc."
       }
      }
     },
     "localname": "OranjeHoldcoIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_OtherValuationTechniqueMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Other Valuation Technique",
        "label": "Other Valuation Technique [Member]",
        "terseLabel": "Other"
       }
      }
     },
     "localname": "OtherValuationTechniqueMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_PPVIntermediateHoldingsLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "PPV Intermediate Holdings LLC",
        "label": "PPV Intermediate Holdings LLC [Member]",
        "terseLabel": "PPV Intermediate Holdings LLC"
       }
      }
     },
     "localname": "PPVIntermediateHoldingsLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_PermianHoldco3IncAndPermianTrustMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Permian Holdco 3, Inc. And Permian Trust",
        "label": "Permian Holdco 3, Inc. And Permian Trust [Member]",
        "terseLabel": "Permian Holdco 3, Inc. / Permian Trust"
       }
      }
     },
     "localname": "PermianHoldco3IncAndPermianTrustMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_PermianTrustMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Permian Trust",
        "label": "Permian Trust [Member]",
        "terseLabel": "Permian Trust"
       }
      }
     },
     "localname": "PermianTrustMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_PhyNetDermatologyLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "PhyNet Dermatology LLC",
        "label": "PhyNet Dermatology LLC [Member]",
        "terseLabel": "PhyNet Dermatology LLC"
       }
      }
     },
     "localname": "PhyNetDermatologyLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_PioneerBuyerILLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Pioneer Buyer I, LLC",
        "label": "Pioneer Buyer I, LLC [Member]",
        "terseLabel": "Pioneer Buyer I, LLC"
       }
      }
     },
     "localname": "PioneerBuyerILLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_PreferredStockDividendRateBasisSpreadOnVariableRate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Preferred Stock, Dividend Rate, Basis Spread On Variable Rate",
        "label": "Preferred Stock, Dividend Rate, Basis Spread On Variable Rate",
        "terseLabel": "Preferred equity variable rate margin"
       }
      }
     },
     "localname": "PreferredStockDividendRateBasisSpreadOnVariableRate",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "percentItemType"
    },
    "nmfc_ProceedsFromPurchaseOfUndrawnPortionOfInvestmentOperatingActivity": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 13.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Proceeds from Purchase of Undrawn Portion of Investment, Operating Activity",
        "label": "Proceeds from Purchase of Undrawn Portion of Investment, Operating Activity",
        "terseLabel": "Cash received for purchase of undrawn portion of revolving credit or delayed draw facilities"
       }
      }
     },
     "localname": "ProceedsFromPurchaseOfUndrawnPortionOfInvestmentOperatingActivity",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_PyeBarkerFireSafetyLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Pye-Barker Fire &amp; Safety, LLC",
        "label": "Pye-Barker Fire &amp; Safety, LLC [Member]",
        "terseLabel": "Pye-Barker Fire &amp; Safety, LLC"
       }
      }
     },
     "localname": "PyeBarkerFireSafetyLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_QIDNGLLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "QID NGL, LLC",
        "label": "QID NGL, LLC [Member]",
        "terseLabel": "QID NGL, LLC"
       }
      }
     },
     "localname": "QIDNGLLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_QIDTRHHoldingsLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "QID TRH Holdings, LLC",
        "label": "QID TRH Holdings, LLC [Member]",
        "terseLabel": "QID TRH Holdings, LLC"
       }
      }
     },
     "localname": "QIDTRHHoldingsLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_RecordedFutureIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Recorded Future, Inc.",
        "label": "Recorded Future, Inc. [Member]",
        "terseLabel": "Recorded Future, Inc."
       }
      }
     },
     "localname": "RecordedFutureIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_RegularDistributionMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Regular Distribution",
        "label": "Regular Distribution [Member]",
        "terseLabel": "Regular distribution"
       }
      }
     },
     "localname": "RegularDistributionMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/SubsequentEventsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_RegulatoryCapitalRequirementsForInvestmentCompaniesTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Regulatory Capital Requirements For Investment Companies",
        "label": "Regulatory Capital Requirements For Investment Companies [Text Block]",
        "terseLabel": "Regulation"
       }
      }
     },
     "localname": "RegulatoryCapitalRequirementsForInvestmentCompaniesTextBlock",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/Regulation"
     ],
     "xbrltype": "textBlockItemType"
    },
    "nmfc_RelatedPartyTransactionTerm": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Related Party Transaction, Term",
        "label": "Related Party Transaction, Term",
        "terseLabel": "Agreement term"
       }
      }
     },
     "localname": "RelatedPartyTransactionTerm",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "nmfc_RetainedEarningsAccumulatedNetInvestmentIncomeLossMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Retained Earnings, Accumulated Net Investment Income (Loss)",
        "label": "Retained Earnings, Accumulated Net Investment Income (Loss) [Member]",
        "terseLabel": "Accumulated Net Investment Income"
       }
      }
     },
     "localname": "RetainedEarningsAccumulatedNetInvestmentIncomeLossMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_RetainedEarningsAccumulatedNetRealizedGainLossMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Retained Earnings, Accumulated Net Realized Gain (Loss)",
        "label": "Retained Earnings, Accumulated Net Realized Gain (Loss) [Member]",
        "terseLabel": "Accumulated Net Realized (Losses) Gains"
       }
      }
     },
     "localname": "RetainedEarningsAccumulatedNetRealizedGainLossMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_RetainedEarningsNetUnrealizedAppreciationDepreciationMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Retained Earnings, Net Unrealized Appreciation (Depreciation)",
        "label": "Retained Earnings, Net Unrealized Appreciation (Depreciation) [Member]",
        "terseLabel": "Net Unrealized Appreciation (Depreciation)"
       }
      }
     },
     "localname": "RetainedEarningsNetUnrealizedAppreciationDepreciationMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_SafetyBorrowerHoldingsLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Safety Borrower Holdings LLC",
        "label": "Safety Borrower Holdings LLC [Member]",
        "terseLabel": "Safety Borrower Holdings LLC"
       }
      }
     },
     "localname": "SafetyBorrowerHoldingsLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_SaleOfStockMaximumIssuanceAmount": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sale Of Stock, Maximum Issuance, Amount",
        "label": "Sale Of Stock, Maximum Issuance, Amount",
        "terseLabel": "Sale of stock, issuance amount"
       }
      }
     },
     "localname": "SaleOfStockMaximumIssuanceAmount",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_SaleOfStockRemainingStockAvailableForIssuanceAmount": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sale Of Stock, Remaining Stock Available For Issuance, Amount",
        "label": "Sale Of Stock, Remaining Stock Available For Issuance, Amount",
        "terseLabel": "Sale of stock, remaining amount available for issuance and sale"
       }
      }
     },
     "localname": "SaleOfStockRemainingStockAvailableForIssuanceAmount",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_SecuredOvernightFinancingRateSOFRMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Secured Overnight Financing Rate (SOFR)",
        "label": "Secured Overnight Financing Rate (SOFR) [Member]",
        "terseLabel": "SOFR"
       }
      }
     },
     "localname": "SecuredOvernightFinancingRateSOFRMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_SecuritiesPurchasedUnderAgreementsToResellCost": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Securities Purchased Under Agreements To Resell, Cost",
        "label": "Securities Purchased Under Agreements To Resell, Cost",
        "terseLabel": "Securities purchased under collateralized agreements to resell, cost",
        "verboseLabel": "Cost basis of securities purchased under collateralized agreements to resell"
       }
      }
     },
     "localname": "SecuritiesPurchasedUnderAgreementsToResellCost",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_SierraHamiltonHoldingsCorporationMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sierra Hamilton Holdings Corporation",
        "label": "Sierra Hamilton Holdings Corporation [Member]",
        "terseLabel": "Sierra Hamilton Holdings Corporation"
       }
      }
     },
     "localname": "SierraHamiltonHoldingsCorporationMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_SkyKnightIncomeAlphaLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "SkyKnight Income Alpha, LLC",
        "label": "SkyKnight Income Alpha, LLC [Member]",
        "terseLabel": "SkyKnight Alpha"
       }
      }
     },
     "localname": "SkyKnightIncomeAlphaLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_SkyKnightIncomeIILLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "SkyKnight Income II, LLC",
        "label": "SkyKnight Income II, LLC [Member]",
        "terseLabel": "SkyKnight II"
       }
      }
     },
     "localname": "SkyKnightIncomeIILLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_SmallBusinessAssociationRegulationRegulatoryCapitalActual": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Small Business Association Regulation, Regulatory Capital, Actual",
        "label": "Small Business Association Regulation, Regulatory Capital, Actual",
        "terseLabel": "Regulatory capital"
       }
      }
     },
     "localname": "SmallBusinessAssociationRegulationRegulatoryCapitalActual",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_SoftwareSectorMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Software Sector",
        "label": "Software Sector [Member]",
        "terseLabel": "Software"
       }
      }
     },
     "localname": "SoftwareSectorMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_SpecialtycareIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Specialtycare, Inc.",
        "label": "Specialtycare, Inc. [Member]",
        "terseLabel": "Specialtycare, Inc."
       }
      }
     },
     "localname": "SpecialtycareIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_StockIssuanceCostsIncurredButNotYetPaid": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Stock Issuance Costs Incurred but Not Yet Paid",
        "label": "Stock Issuance Costs Incurred but Not Yet Paid",
        "terseLabel": "Accrual for offering costs"
       }
      }
     },
     "localname": "StockIssuanceCostsIncurredButNotYetPaid",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_StockIssuedDuringPeriodSharesNewIssuesAndDividendReinvestmentPlan": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Stock Issued During Period, Shares, New Issues And Dividend Reinvestment Plan",
        "label": "Stock Issued During Period, Shares, New Issues And Dividend Reinvestment Plan",
        "terseLabel": "Issuances of common stock (in shares)"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesNewIssuesAndDividendReinvestmentPlan",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "nmfc_StockIssuedDuringPeriodValueNewIssuesAndDividendReinvestmentPlan": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Stock Issued During Period, Value, New Issues And Dividend Reinvestment Plan",
        "label": "Stock Issued During Period, Value, New Issues And Dividend Reinvestment Plan",
        "terseLabel": "Issuances of common stock"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueNewIssuesAndDividendReinvestmentPlan",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_StrainOnBankingSystemMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Strain On Banking System",
        "label": "Strain On Banking System [Member]"
       }
      }
     },
     "localname": "StrainOnBankingSystemMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://xbrl.sec.gov/cef/role/N2"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_SunAcquirerCorpMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sun Acquirer Corp.",
        "label": "Sun Acquirer Corp. [Member]",
        "terseLabel": "Sun Acquirer Corp."
       }
      }
     },
     "localname": "SunAcquirerCorpMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_SupplementalDistributionMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Supplemental Distribution",
        "label": "Supplemental Distribution [Member]",
        "terseLabel": "Supplemental distribution"
       }
      }
     },
     "localname": "SupplementalDistributionMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/SubsequentEventsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_SymplrSoftwareIntermediateHoldingsIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Symplr Software Intermediate Holdings, Inc.",
        "label": "Symplr Software Intermediate Holdings, Inc. [Member]",
        "terseLabel": "Symplr Software Intermediate Holdings, Inc."
       }
      }
     },
     "localname": "SymplrSoftwareIntermediateHoldingsIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_SyndigoLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Syndigo LLC",
        "label": "Syndigo LLC [Member]",
        "terseLabel": "Syndigo LLC"
       }
      }
     },
     "localname": "SyndigoLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_TMKHawkParentCorpMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "TMK Hawk Parent, Corp.",
        "label": "TMK Hawk Parent, Corp. [Member]",
        "terseLabel": "TMK Hawk Parent, Corp."
       }
      }
     },
     "localname": "TMKHawkParentCorpMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_TVGEdmentumHoldingsLLCAndEdmentumUltimateHoldingsLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "TVG-Edmentum Holdings, LLC And Edmentum Ultimate Holdings, LLC",
        "label": "TVG-Edmentum Holdings, LLC And Edmentum Ultimate Holdings, LLC [Member]",
        "terseLabel": "TVG-Edmentum Holdings, LLC / Edmentum Ultimate Holdings, LLC"
       }
      }
     },
     "localname": "TVGEdmentumHoldingsLLCAndEdmentumUltimateHoldingsLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_TahoeFincoLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tahoe Finco, LLC",
        "label": "Tahoe Finco, LLC [Member]",
        "terseLabel": "Tahoe Finco, LLC"
       }
      }
     },
     "localname": "TahoeFincoLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_TennesseeBidcoLimitedMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tennessee Bidco Limited",
        "label": "Tennessee Bidco Limited [Member]",
        "terseLabel": "Tennessee Bidco Limited"
       }
      }
     },
     "localname": "TennesseeBidcoLimitedMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_TigerConnectIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "TigerConnect, Inc.",
        "label": "TigerConnect, Inc. [Member]",
        "terseLabel": "TigerConnect, Inc."
       }
      }
     },
     "localname": "TigerConnectIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_TrinityAirConsultantsHoldingsCorporationMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Trinity Air Consultants Holdings Corporation",
        "label": "Trinity Air Consultants Holdings Corporation [Member]",
        "terseLabel": "Trinity Air Consultants Holdings Corporation"
       }
      }
     },
     "localname": "TrinityAirConsultantsHoldingsCorporationMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_USD13000SBAGuaranteedDebenturesIssuedSeptember2017Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "USD 13,000 SBA Guaranteed Debentures, Issued September 2017",
        "label": "USD 13,000 SBA Guaranteed Debentures, Issued September 2017 [Member]",
        "terseLabel": "$13,000 SBA-guaranteed debentures, Issued September 2017"
       }
      }
     },
     "localname": "USD13000SBAGuaranteedDebenturesIssuedSeptember2017Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_USD13950SBAGuaranteedDebenturesIssuedMarch2016Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "USD 13,950 SBA Guaranteed Debentures, Issued March 2016",
        "label": "USD 13,950 SBA Guaranteed Debentures, Issued March 2016 [Member]",
        "terseLabel": "$13,950 SBA-guaranteed debentures, Issued March 2016"
       }
      }
     },
     "localname": "USD13950SBAGuaranteedDebenturesIssuedMarch2016Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_USD15000SBAGuaranteedDebenturesIssuedSeptember2018Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "USD 15,000 SBA Guaranteed Debentures, Issued September 2018",
        "label": "USD 15,000 SBA Guaranteed Debentures, Issued September 2018 [Member]",
        "terseLabel": "$15,000 SBA-guaranteed debentures, Issued September 2018"
       }
      }
     },
     "localname": "USD15000SBAGuaranteedDebenturesIssuedSeptember2018Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_USD15255SBAGuaranteedDebenturesIssuedMarch2018Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "USD 15,255 SBA Guaranteed Debentures, Issued March 2018",
        "label": "USD 15,255 SBA Guaranteed Debentures, Issued March 2018 [Member]",
        "terseLabel": "$15,255 SBA-guaranteed debentures, Issued March 2018"
       }
      }
     },
     "localname": "USD15255SBAGuaranteedDebenturesIssuedMarch2018Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_USD19000SBAGuaranteedDebenturesIssuedSeptember2019Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "USD 19,000 SBA Guaranteed Debentures, Issued September 2019",
        "label": "USD 19,000 SBA Guaranteed Debentures, Issued September 2019 [Member]",
        "terseLabel": "$19,000 SBA-guaranteed debentures, Issued September 2019"
       }
      }
     },
     "localname": "USD19000SBAGuaranteedDebenturesIssuedSeptember2019Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_USD24000SBAGuaranteedDebenturesIssuedMarch2020Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "USD 24,000 SBA Guaranteed Debentures, Issued March 2020",
        "label": "USD 24,000 SBA Guaranteed Debentures, Issued March 2020 [Member]",
        "terseLabel": "$24,000 SBA-guaranteed debentures, Issued March 2020"
       }
      }
     },
     "localname": "USD24000SBAGuaranteedDebenturesIssuedMarch2020Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_USD28795SBAGuaranteedDebenturesIssuedSeptember2015Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "USD 28,795 SBA Guaranteed Debentures, Issued September 2015",
        "label": "USD 28,795 SBA Guaranteed Debentures, Issued September 2015 [Member]",
        "terseLabel": "$28,795 SBA-guaranteed Debentures, Issued September 2015"
       }
      }
     },
     "localname": "USD28795SBAGuaranteedDebenturesIssuedSeptember2015Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_USD37500SBAGuaranteedDebenturesIssuedMarch2015Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "USD 37,500 SBA Guaranteed Debentures, Issued March 2015",
        "label": "USD 37,500 SBA Guaranteed Debentures, Issued March 2015 [Member]",
        "terseLabel": "$37,500 SBA-guaranteed Debentures, Issued March 2015"
       }
      }
     },
     "localname": "USD37500SBAGuaranteedDebenturesIssuedMarch2015Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_USD37500SBAGuaranteedDebenturesIssuedSeptember2015Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "USD 37,500 SBA Guaranteed Debentures, Issued September 2015",
        "label": "USD 37,500 SBA Guaranteed Debentures, Issued September 2015 [Member]",
        "terseLabel": "$37,500 SBA-guaranteed Debentures, Issued September 2015"
       }
      }
     },
     "localname": "USD37500SBAGuaranteedDebenturesIssuedSeptember2015Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_USD4000SBAGuaranteedDebenturesIssuedSeptember2016Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "USD 4,000 SBA Guaranteed Debentures, Issued September 2016",
        "label": "USD 4,000 SBA Guaranteed Debentures, Issued September 2016 [Member]",
        "terseLabel": "$4,000 SBA-guaranteed debentures, Issued September 2016"
       }
      }
     },
     "localname": "USD4000SBAGuaranteedDebenturesIssuedSeptember2016Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_USD41000SBAGuaranteedDebenturesIssuedMarch2020Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "USD 41,000 SBA Guaranteed Debentures, Issued March 2020",
        "label": "USD 41,000 SBA Guaranteed Debentures, Issued March 2020 [Member]",
        "terseLabel": "$41,000 SBA-guaranteed debentures, Issued March 2020"
       }
      }
     },
     "localname": "USD41000SBAGuaranteedDebenturesIssuedMarch2020Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_USD51000SBAGuaranteedDebenturesIssuedSeptember2020Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "USD 51,000 SBA Guaranteed Debentures, Issued September 2020",
        "label": "USD 51,000 SBA Guaranteed Debentures, Issued September 2020 [Member]",
        "terseLabel": "$51,000 SBA-guaranteed debentures, Issued September 2020"
       }
      }
     },
     "localname": "USD51000SBAGuaranteedDebenturesIssuedSeptember2020Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_USRPHoldingsIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "USRP Holdings, Inc.",
        "label": "USRP Holdings, Inc. [Member]",
        "terseLabel": "USRP Holdings, Inc."
       }
      }
     },
     "localname": "USRPHoldingsIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_UnfundedDebtSecuritiesBridgeFacilitiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unfunded Debt Securities, Bridge Facilities",
        "label": "Unfunded Debt Securities, Bridge Facilities [Member]",
        "terseLabel": "Unfunded commitments on bridge facilities",
        "verboseLabel": "Bridge financing commitments"
       }
      }
     },
     "localname": "UnfundedDebtSecuritiesBridgeFacilitiesMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/CommitmentsandContingenciesDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_UnfundedDebtSecuritiesDelayedDrawsOrOtherFutureFundingCommitmentsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unfunded Debt Securities, Delayed Draws Or Other Future Funding Commitments",
        "label": "Unfunded Debt Securities, Delayed Draws Or Other Future Funding Commitments [Member]",
        "terseLabel": "Unfunded commitments on delayed draws or other future funding commitments",
        "verboseLabel": "Other future funding commitments"
       }
      }
     },
     "localname": "UnfundedDebtSecuritiesDelayedDrawsOrOtherFutureFundingCommitmentsMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/CommitmentsandContingenciesDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_UnfundedDebtSecuritiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unfunded Debt Securities",
        "label": "Unfunded Debt Securities [Member]",
        "terseLabel": "Unfunded Debt Investments"
       }
      }
     },
     "localname": "UnfundedDebtSecuritiesMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_UnfundedDebtSecuritiesRevolvingCreditFacilitiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unfunded Debt Securities, Revolving Credit Facilities",
        "label": "Unfunded Debt Securities, Revolving Credit Facilities [Member]",
        "terseLabel": "Unfunded commitments on revolving credit facilities"
       }
      }
     },
     "localname": "UnfundedDebtSecuritiesRevolvingCreditFacilitiesMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/CommitmentsandContingenciesDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_UnfundedSecuritiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unfunded Securities",
        "label": "Unfunded Securities [Member]",
        "terseLabel": "Unfunded Investments"
       }
      }
     },
     "localname": "UnfundedSecuritiesMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_UniTekGlobalServicesIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "UniTek Global Services, Inc.",
        "label": "UniTek Global Services, Inc. [Member]",
        "terseLabel": "UniTek Global Services, Inc."
       }
      }
     },
     "localname": "UniTekGlobalServicesIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_UnrealizedGainLossSecuritiesRepurchasedUnderAgreementsToResell": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      },
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets": {
       "order": 4.0,
       "parentTag": "us-gaap_ProfitLoss",
       "weight": 1.0
      },
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 4.0,
       "parentTag": "us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionOperatingAfterTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unrealized Gain (Loss), Securities Repurchased Under Agreements To Resell",
        "label": "Unrealized Gain (Loss), Securities Repurchased Under Agreements To Resell",
        "negatedTerseLabel": "Net change in unrealized depreciation of securities purchased under collateralized agreements to resell",
        "terseLabel": "Net change in unrealized depreciation of securities purchased under collateralized agreements to resell",
        "verboseLabel": "Securities purchased under collateralized agreements to resell"
       }
      }
     },
     "localname": "UnrealizedGainLossSecuritiesRepurchasedUnderAgreementsToResell",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "nmfc_UnsecuredManagementCompanyRevolverMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unsecured Management Company Revolver",
        "label": "Unsecured Management Company Revolver [Member]",
        "terseLabel": "Unsecured Management Company Revolver"
       }
      }
     },
     "localname": "UnsecuredManagementCompanyRevolverMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_UnsecuredNotesEffectiveApril2019Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unsecured Notes Effective April 2019",
        "label": "Unsecured Notes Effective April 2019 [Member]",
        "terseLabel": "2019A Unsecured Notes"
       }
      }
     },
     "localname": "UnsecuredNotesEffectiveApril2019Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_UnsecuredNotesEffectiveJanuary2018Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unsecured Notes Effective January 2018",
        "label": "Unsecured Notes Effective January 2018 [Member]",
        "terseLabel": "2018A Unsecured Notes"
       }
      }
     },
     "localname": "UnsecuredNotesEffectiveJanuary2018Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_UnsecuredNotesEffectiveJanuary2021Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unsecured Notes Effective January 2021",
        "label": "Unsecured Notes Effective January 2021 [Member]",
        "terseLabel": "2021A Unsecured Notes"
       }
      }
     },
     "localname": "UnsecuredNotesEffectiveJanuary2021Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_UnsecuredNotesEffectiveJuly2018Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unsecured Notes Effective July 2018",
        "label": "Unsecured Notes Effective July 2018 [Member]",
        "terseLabel": "2018B Unsecured Notes"
       }
      }
     },
     "localname": "UnsecuredNotesEffectiveJuly2018Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_UnsecuredNotesEffectiveJune2017Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unsecured Notes Effective June 2017",
        "label": "Unsecured Notes Effective June 2017 [Member]",
        "terseLabel": "2017A Unsecured Notes"
       }
      }
     },
     "localname": "UnsecuredNotesEffectiveJune2017Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_UnsecuredNotesEffectiveJune2022Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unsecured Notes Effective June 2022",
        "label": "Unsecured Notes Effective June 2022 [Member]",
        "terseLabel": "2022A Unsecured Notes"
       }
      }
     },
     "localname": "UnsecuredNotesEffectiveJune2022Member",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_VTTopcoIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "VT Topco, Inc.",
        "label": "VT Topco, Inc. [Member]",
        "terseLabel": "VT Topco, Inc."
       }
      }
     },
     "localname": "VTTopcoIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_ValuationMarketAndIncomeApproachMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Valuation, Market And Income Approach",
        "label": "Valuation, Market And Income Approach [Member]",
        "terseLabel": "Market &amp; income approach"
       }
      }
     },
     "localname": "ValuationMarketAndIncomeApproachMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_VariableRateComponentAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Variable Rate Component",
        "label": "Variable Rate Component [Axis]",
        "terseLabel": "Variable Rate Component [Axis]"
       }
      }
     },
     "localname": "VariableRateComponentAxis",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "nmfc_VariableRateComponentDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Variable Rate Component [Domain]",
        "label": "Variable Rate Component [Domain]",
        "terseLabel": "Variable Rate Component [Domain]"
       }
      }
     },
     "localname": "VariableRateComponentDomain",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_VariableRatePeriodAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Variable Rate Period",
        "label": "Variable Rate Period [Axis]",
        "terseLabel": "Variable Rate Period [Axis]"
       }
      }
     },
     "localname": "VariableRatePeriodAxis",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "nmfc_VariableRatePeriodDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Variable Rate Period [Domain]",
        "label": "Variable Rate Period [Domain]",
        "terseLabel": "Variable Rate Period [Domain]"
       }
      }
     },
     "localname": "VariableRatePeriodDomain",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_WealthEnhancementGroupLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Wealth Enhancement Group, LLC",
        "label": "Wealth Enhancement Group, LLC [Member]",
        "terseLabel": "Wealth Enhancement Group, LLC"
       }
      }
     },
     "localname": "WealthEnhancementGroupLLCMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_XactlyCorporationMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Xactly Corporation",
        "label": "Xactly Corporation [Member]",
        "terseLabel": "Xactly Corporation"
       }
      }
     },
     "localname": "XactlyCorporationMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "nmfc_YLGHoldingsIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "YLG Holdings, Inc.",
        "label": "YLG Holdings, Inc. [Member]",
        "terseLabel": "YLG Holdings, Inc."
       }
      }
     },
     "localname": "YLGHoldingsIncMember",
     "nsuri": "http://www.newmountainfinance.com/20230331",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_AffiliatedEntityMember": {
     "auth_ref": [
      "r499",
      "r658",
      "r666",
      "r667",
      "r668"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Affiliated Entity [Member]",
        "terseLabel": "Affiliated entity"
       }
      }
     },
     "localname": "AffiliatedEntityMember",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_CounterpartyNameAxis": {
     "auth_ref": [
      "r190",
      "r192",
      "r286",
      "r306",
      "r505",
      "r507"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Counterparty Name [Axis]",
        "terseLabel": "Counterparty Name [Axis]"
       }
      }
     },
     "localname": "CounterpartyNameAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesSummaryofPropertiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_LitigationCaseAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Litigation Case [Axis]",
        "terseLabel": "Litigation Case [Axis]"
       }
      }
     },
     "localname": "LitigationCaseAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_LitigationCaseTypeDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Litigation Case [Domain]",
        "terseLabel": "Litigation Case [Domain]"
       }
      }
     },
     "localname": "LitigationCaseTypeDomain",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MaximumMember": {
     "auth_ref": [
      "r270",
      "r271",
      "r272",
      "r273",
      "r320",
      "r435",
      "r457",
      "r500",
      "r501",
      "r521",
      "r526",
      "r531",
      "r655",
      "r671",
      "r672",
      "r673",
      "r674",
      "r675",
      "r676"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maximum [Member]",
        "terseLabel": "Maximum",
        "verboseLabel": "High"
       }
      }
     },
     "localname": "MaximumMember",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails",
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MinimumMember": {
     "auth_ref": [
      "r270",
      "r271",
      "r272",
      "r273",
      "r320",
      "r435",
      "r457",
      "r500",
      "r501",
      "r521",
      "r526",
      "r531",
      "r655",
      "r671",
      "r672",
      "r673",
      "r674",
      "r675",
      "r676"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Minimum [Member]",
        "terseLabel": "Minimum",
        "verboseLabel": "Low"
       }
      }
     },
     "localname": "MinimumMember",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails",
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_OwnershipAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Ownership [Axis]",
        "terseLabel": "Ownership [Axis]"
       }
      }
     },
     "localname": "OwnershipAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_OwnershipDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Ownership [Domain]",
        "terseLabel": "Ownership [Domain]"
       }
      }
     },
     "localname": "OwnershipDomain",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_RangeAxis": {
     "auth_ref": [
      "r270",
      "r271",
      "r272",
      "r273",
      "r312",
      "r320",
      "r321",
      "r322",
      "r323",
      "r410",
      "r435",
      "r457",
      "r500",
      "r501",
      "r521",
      "r526",
      "r531",
      "r648",
      "r655",
      "r672",
      "r673",
      "r674",
      "r675",
      "r676"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statistical Measurement [Axis]",
        "terseLabel": "Statistical Measurement [Axis]"
       }
      }
     },
     "localname": "RangeAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails",
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails",
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_RangeMember": {
     "auth_ref": [
      "r270",
      "r271",
      "r272",
      "r273",
      "r312",
      "r320",
      "r321",
      "r322",
      "r323",
      "r410",
      "r435",
      "r457",
      "r500",
      "r501",
      "r521",
      "r526",
      "r531",
      "r648",
      "r655",
      "r672",
      "r673",
      "r674",
      "r675",
      "r676"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statistical Measurement [Domain]",
        "terseLabel": "Statistical Measurement [Domain]"
       }
      }
     },
     "localname": "RangeMember",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails",
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails",
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_RepurchaseAgreementCounterpartyNameDomain": {
     "auth_ref": [
      "r190",
      "r192",
      "r286",
      "r306",
      "r506",
      "r507"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Counterparty Name [Domain]",
        "terseLabel": "Counterparty Name [Domain]"
       }
      }
     },
     "localname": "RepurchaseAgreementCounterpartyNameDomain",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesSummaryofPropertiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_SegmentGeographicalDomain": {
     "auth_ref": [
      "r246",
      "r247",
      "r490",
      "r491",
      "r492",
      "r493",
      "r494",
      "r495",
      "r496",
      "r497",
      "r498",
      "r522",
      "r530",
      "r657"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Geographical [Domain]",
        "terseLabel": "Geographical [Domain]"
       }
      }
     },
     "localname": "SegmentGeographicalDomain",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_StatementGeographicalAxis": {
     "auth_ref": [
      "r246",
      "r247",
      "r487",
      "r490",
      "r491",
      "r492",
      "r493",
      "r494",
      "r495",
      "r496",
      "r497",
      "r498",
      "r522",
      "r530",
      "r657"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Geographical [Axis]",
        "terseLabel": "Geographical [Axis]"
       }
      }
     },
     "localname": "StatementGeographicalAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_WeightedAverageMember": {
     "auth_ref": [
      "r500",
      "r501",
      "r671",
      "r673",
      "r676"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Weighted Average [Member]",
        "terseLabel": "Weighted Average",
        "verboseLabel": "Weighted average"
       }
      }
     },
     "localname": "WeightedAverageMember",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails",
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccountingChangesAndErrorCorrectionsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Accounting Changes and Error Corrections [Abstract]"
       }
      }
     },
     "localname": "AccountingChangesAndErrorCorrectionsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccountingPoliciesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Accounting Policies [Abstract]"
       }
      }
     },
     "localname": "AccountingPoliciesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments": {
     "auth_ref": [
      "r38"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 7.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.",
        "label": "Accretion (Amortization) of Discounts and Premiums, Investments",
        "negatedTerseLabel": "Amortization of purchase discount"
       }
      }
     },
     "localname": "AccretionAmortizationOfDiscountsAndPremiumsInvestments",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedAmortizationDeferredFinanceCosts": {
     "auth_ref": [
      "r98"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accumulated amortization of debt issuance costs.",
        "label": "Accumulated Amortization, Debt Issuance Costs",
        "terseLabel": "Deferred financing costs, accumulated amortization"
       }
      }
     },
     "localname": "AccumulatedAmortizationDeferredFinanceCosts",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdditionalPaidInCapital": {
     "auth_ref": [
      "r6",
      "r529"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 3.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of excess of issue price over par or stated value of stock and from other transaction involving stock or stockholder. Includes, but is not limited to, additional paid-in capital (APIC) for common and preferred stock.",
        "label": "Additional Paid in Capital",
        "terseLabel": "Paid in capital in excess of par"
       }
      }
     },
     "localname": "AdditionalPaidInCapital",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdditionalPaidInCapitalMember": {
     "auth_ref": [
      "r324",
      "r325",
      "r326",
      "r637",
      "r638",
      "r639",
      "r659"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders.",
        "label": "Additional Paid-in Capital [Member]",
        "terseLabel": "Paid in Capital in Excess of Par"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts": {
     "auth_ref": [
      "r65",
      "r71"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets": {
       "order": 2.0,
       "parentTag": "nmfc_InvestmentCompanyCapitalTransactionsIncreaseDecrease",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration.",
        "label": "Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs",
        "negatedLabel": "Offering costs",
        "negatedTerseLabel": "Offering costs"
       }
      }
     },
     "localname": "AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets",
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdministrativeFeesExpense": {
     "auth_ref": [
      "r101"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 5.0,
       "parentTag": "us-gaap_InvestmentIncomeInvestmentExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expense for administrative services provided to the limited liability company (LLC) or limited partnership (LP) by the managing member or general partner, affiliate of managing member or general partner, or affiliate of LLC or LP, for example, but not limited to, salaries, rent, or overhead costs.",
        "label": "Administrative Fees Expense",
        "terseLabel": "Administrative expenses"
       }
      }
     },
     "localname": "AdministrativeFeesExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AmortizationOfDebtDiscountPremium": {
     "auth_ref": [
      "r24",
      "r37",
      "r96",
      "r298"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 9.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.",
        "label": "Amortization of Debt Discount (Premium)",
        "terseLabel": "Amortization of premium on Convertible Notes",
        "verboseLabel": "Amortization of premium"
       }
      }
     },
     "localname": "AmortizationOfDebtDiscountPremium",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesOtherInformationDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AmortizationOfFinancingCosts": {
     "auth_ref": [
      "r20",
      "r298",
      "r386",
      "r631"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 8.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of amortization expense attributable to debt issuance costs.",
        "label": "Amortization of Debt Issuance Costs",
        "terseLabel": "Amortization of deferred financing costs",
        "verboseLabel": "Amortization of financing costs"
       }
      }
     },
     "localname": "AmortizationOfFinancingCosts",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebentureOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AreaOfRealEstateProperty": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Area of a real estate property.",
        "label": "Area of Real Estate Property",
        "terseLabel": "Total Square Feet"
       }
      }
     },
     "localname": "AreaOfRealEstateProperty",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesSummaryofPropertiesDetails"
     ],
     "xbrltype": "areaItemType"
    },
    "us-gaap_Assets": {
     "auth_ref": [
      "r105",
      "r123",
      "r169",
      "r188",
      "r240",
      "r242",
      "r244",
      "r254",
      "r274",
      "r275",
      "r276",
      "r277",
      "r278",
      "r279",
      "r280",
      "r281",
      "r282",
      "r348",
      "r352",
      "r373",
      "r529",
      "r653",
      "r654",
      "r669"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.",
        "label": "Assets",
        "totalLabel": "Total assets"
       }
      }
     },
     "localname": "Assets",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Assets [Abstract]",
        "terseLabel": "Assets"
       }
      }
     },
     "localname": "AssetsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BaseRateMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Minimum rate investor will accept.",
        "label": "Base Rate [Member]",
        "terseLabel": "Base Rate"
       }
      }
     },
     "localname": "BaseRateMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_BasisOfAccountingPolicyPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).",
        "label": "Basis of Accounting, Policy [Policy Text Block]",
        "terseLabel": "Basis of accounting"
       }
      }
     },
     "localname": "BasisOfAccountingPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock": {
     "auth_ref": [
      "r46"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for the basis of presentation and significant accounting policies concepts. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). Accounting policies describe all significant accounting policies of the reporting entity.",
        "label": "Basis of Presentation and Significant Accounting Policies [Text Block]",
        "terseLabel": "Summary of Significant Accounting Policies"
       }
      }
     },
     "localname": "BasisOfPresentationAndSignificantAccountingPoliciesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CarryingReportedAmountFairValueDisclosureMember": {
     "auth_ref": [
      "r90",
      "r91"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measured as reported on the statement of financial position (balance sheet).",
        "label": "Reported Value Measurement [Member]",
        "terseLabel": "Principal Amount"
       }
      }
     },
     "localname": "CarryingReportedAmountFairValueDisclosureMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CashAndCashEquivalentsAtCarryingValue": {
     "auth_ref": [
      "r39",
      "r167",
      "r504"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 3.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.",
        "label": "Cash and Cash Equivalents, at Carrying Value",
        "terseLabel": "Cash and cash equivalents"
       }
      }
     },
     "localname": "CashAndCashEquivalentsAtCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashAndCashEquivalentsPolicyTextBlock": {
     "auth_ref": [
      "r40"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.",
        "label": "Cash and Cash Equivalents, Policy [Policy Text Block]",
        "terseLabel": "Cash and cash equivalents"
       }
      }
     },
     "localname": "CashAndCashEquivalentsPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": {
     "auth_ref": [
      "r32",
      "r39",
      "r45"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents",
        "periodEndLabel": "Cash and cash equivalents at the end of the period",
        "periodStartLabel": "Cash and cash equivalents at the beginning of the period"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect": {
     "auth_ref": [
      "r32",
      "r94"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; excluding effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect",
        "totalLabel": "Net decrease in cash and cash equivalents"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashEquivalentsAtCarryingValue": {
     "auth_ref": [
      "r629"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.",
        "label": "Cash Equivalents, at Carrying Value",
        "terseLabel": "Cash equivalents"
       }
      }
     },
     "localname": "CashEquivalentsAtCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ChemicalsSectorMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Chemicals Sector [Member]",
        "terseLabel": "Specialty Chemicals &amp; Materials"
       }
      }
     },
     "localname": "ChemicalsSectorMember",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ClassOfStockDomain": {
     "auth_ref": [
      "r170",
      "r171",
      "r172",
      "r188",
      "r216",
      "r217",
      "r221",
      "r223",
      "r232",
      "r233",
      "r254",
      "r274",
      "r276",
      "r277",
      "r278",
      "r281",
      "r282",
      "r304",
      "r305",
      "r307",
      "r308",
      "r310",
      "r373",
      "r502",
      "r628",
      "r632",
      "r640"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share of stock differentiated by the voting rights the holder receives. Examples include, but are not limited to, common stock, redeemable preferred stock, nonredeemable preferred stock, and convertible stock.",
        "label": "Class of Stock [Domain]",
        "terseLabel": "Class of Stock [Domain]"
       }
      }
     },
     "localname": "ClassOfStockDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommitmentsAndContingencies": {
     "auth_ref": [
      "r16",
      "r114",
      "r128"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.",
        "label": "Commitments and Contingencies",
        "terseLabel": "Commitments and contingencies (See Note 9)"
       }
      }
     },
     "localname": "CommitmentsAndContingencies",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Commitments and Contingencies Disclosure [Abstract]"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureTextBlock": {
     "auth_ref": [
      "r58",
      "r268",
      "r269",
      "r489",
      "r652"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for commitments and contingencies.",
        "label": "Commitments and Contingencies Disclosure [Text Block]",
        "terseLabel": "Commitments and Contingencies"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/CommitmentsandContingencies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CommonClassBMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Classification of common stock that has different rights than Common Class A, representing ownership interest in a corporation.",
        "label": "Common Class B [Member]",
        "terseLabel": "Common Class B"
       }
      }
     },
     "localname": "CommonClassBMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommonStockDividendsPerShareCashPaid": {
     "auth_ref": [
      "r71"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate dividends paid during the period for each share of common stock outstanding.",
        "label": "Common Stock, Dividends, Per Share, Cash Paid",
        "terseLabel": "Distributions paid per share (in dollars per share)"
       }
      }
     },
     "localname": "CommonStockDividendsPerShareCashPaid",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CommonStockDividendsPerShareDeclared": {
     "auth_ref": [
      "r71"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate dividends declared during the period for each share of common stock outstanding.",
        "label": "Common Stock, Dividends, Per Share, Declared",
        "terseLabel": "Distributions declared per share (in dollars per share)"
       }
      }
     },
     "localname": "CommonStockDividendsPerShareDeclared",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/SubsequentEventsDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CommonStockMember": {
     "auth_ref": [
      "r637",
      "r638",
      "r659"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Stock that is subordinate to all other stock of the issuer.",
        "label": "Common Stock [Member]",
        "terseLabel": "Common\u00a0Stock"
       }
      }
     },
     "localname": "CommonStockMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommonStockParOrStatedValuePerShare": {
     "auth_ref": [
      "r5"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Face amount or stated value per share of common stock.",
        "label": "Common Stock, Par or Stated Value Per Share",
        "terseLabel": "Common stock, par value (in dollars per share)"
       }
      }
     },
     "localname": "CommonStockParOrStatedValuePerShare",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CommonStockSharesAuthorized": {
     "auth_ref": [
      "r5"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The maximum number of common shares permitted to be issued by an entity's charter and bylaws.",
        "label": "Common Stock, Shares Authorized",
        "terseLabel": "Common stock, shares authorized (in shares)"
       }
      }
     },
     "localname": "CommonStockSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesIssued": {
     "auth_ref": [
      "r5"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.",
        "label": "Common Stock, Shares, Issued",
        "periodEndLabel": "End of the period (in shares)",
        "periodStartLabel": "Beginning of the period (in shares)",
        "terseLabel": "Common stock, shares issued (in shares)"
       }
      }
     },
     "localname": "CommonStockSharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical",
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesOutstanding": {
     "auth_ref": [
      "r5",
      "r65"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.",
        "label": "Common Stock, Shares, Outstanding",
        "netLabel": "Shares outstanding at end of period (in shares)",
        "terseLabel": "Number of shares outstanding (in shares)",
        "verboseLabel": "Common stock, shares outstanding (in shares)"
       }
      }
     },
     "localname": "CommonStockSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockValue": {
     "auth_ref": [
      "r5",
      "r529"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 2.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.",
        "label": "Common Stock, Value, Issued",
        "terseLabel": "Common stock, par value $0.01 per share, 200,000,000 shares authorized, and 100,937,026 and 100,937,026 shares issued and outstanding, respectively"
       }
      }
     },
     "localname": "CommonStockValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ConcentrationRiskBenchmarkDomain": {
     "auth_ref": [
      "r50",
      "r51",
      "r92",
      "r93",
      "r248",
      "r488"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The denominator in a calculation of a disclosed concentration risk percentage.",
        "label": "Concentration Risk Benchmark [Domain]",
        "terseLabel": "Concentration Risk Benchmark [Domain]"
       }
      }
     },
     "localname": "ConcentrationRiskBenchmarkDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ConcentrationRiskByBenchmarkAxis": {
     "auth_ref": [
      "r50",
      "r51",
      "r92",
      "r93",
      "r248",
      "r466",
      "r488"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by benchmark of concentration risk.",
        "label": "Concentration Risk Benchmark [Axis]",
        "terseLabel": "Concentration Risk Benchmark [Axis]"
       }
      }
     },
     "localname": "ConcentrationRiskByBenchmarkAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ConcentrationRiskByTypeAxis": {
     "auth_ref": [
      "r50",
      "r51",
      "r92",
      "r93",
      "r248",
      "r488",
      "r678"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of concentration risk, for example, but not limited to, asset, liability, net assets, geographic, customer, employees, supplier, lender.",
        "label": "Concentration Risk Type [Axis]",
        "terseLabel": "Concentration Risk Type [Axis]"
       }
      }
     },
     "localname": "ConcentrationRiskByTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ConcentrationRiskPercentage1": {
     "auth_ref": [
      "r50",
      "r51",
      "r92",
      "r93",
      "r248"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the \"benchmark\" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.",
        "label": "Concentration Risk, Percentage",
        "terseLabel": "Percent\u00a0of\u00a0Total Investments\u00a0at\u00a0Fair\u00a0Value"
       }
      }
     },
     "localname": "ConcentrationRiskPercentage1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ConcentrationRiskTypeDomain": {
     "auth_ref": [
      "r50",
      "r51",
      "r92",
      "r93",
      "r248",
      "r488"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For an entity that discloses a concentration risk as a percentage of some financial balance or benchmark, identifies the type (for example, asset, liability, net assets, geographic, customer, employees, supplier, lender) of the concentration.",
        "label": "Concentration Risk Type [Domain]",
        "terseLabel": "Concentration Risk Type [Domain]"
       }
      }
     },
     "localname": "ConcentrationRiskTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ContainerAndPackagingSectorMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Container and Packaging Sector [Member]",
        "terseLabel": "Packaging"
       }
      }
     },
     "localname": "ContainerAndPackagingSectorMember",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ConvertibleDebt": {
     "auth_ref": [
      "r3",
      "r107",
      "r124"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 4.0,
       "parentTag": "us-gaap_LongTermDebt",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.",
        "label": "Convertible Debt",
        "terseLabel": "Convertible Notes"
       }
      }
     },
     "localname": "ConvertibleDebt",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ConvertibleDebtMember": {
     "auth_ref": [
      "r61",
      "r283",
      "r284",
      "r289",
      "r290",
      "r291",
      "r294",
      "r295",
      "r296",
      "r297",
      "r298",
      "r516",
      "r517",
      "r518",
      "r519",
      "r520"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.",
        "label": "Convertible Debt [Member]",
        "terseLabel": "Convertible Notes"
       }
      }
     },
     "localname": "ConvertibleDebtMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesOtherInformationDetails",
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ConvertibleDebtTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of convertible debt instrument. Includes, but is not limited to, principal amount and amortized premium or discount.",
        "label": "Convertible Debt [Table Text Block]",
        "terseLabel": "Schedule of Information Related to Convertible Notes"
       }
      }
     },
     "localname": "ConvertibleDebtTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CreditFacilityAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of credit facility. Credit facilities provide capital to borrowers without the need to structure a loan for each borrowing.",
        "label": "Credit Facility [Axis]",
        "terseLabel": "Credit Facility [Axis]"
       }
      }
     },
     "localname": "CreditFacilityAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_CreditFacilityDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Type of credit facility. Credit facilities provide capital to borrowers without the need to structure a loan for each borrowing.",
        "label": "Credit Facility [Domain]",
        "terseLabel": "Credit Facility [Domain]"
       }
      }
     },
     "localname": "CreditFacilityDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CurrentIncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r73",
      "r335",
      "r345",
      "r635"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.",
        "label": "Current Income Tax Expense (Benefit)",
        "verboseLabel": "Current income tax expense"
       }
      }
     },
     "localname": "CurrentIncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtAndEquitySecuritiesRealizedGainLoss": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      },
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 1.0,
       "parentTag": "us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionOperatingAfterTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of realized gain (loss) on investment in debt and equity securities.",
        "label": "Debt and Equity Securities, Realized Gain (Loss)",
        "negatedTerseLabel": "Net realized gains on investments",
        "terseLabel": "Investments",
        "verboseLabel": "Net realized losses on investments"
       }
      }
     },
     "localname": "DebtAndEquitySecuritiesRealizedGainLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      },
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 3.0,
       "parentTag": "us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionOperatingAfterTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of unrealized gain (loss) on investment in debt and equity securities.",
        "label": "Debt and Equity Securities, Unrealized Gain (Loss)",
        "negatedTerseLabel": "Net change in unrealized (appreciation) depreciation of investments",
        "terseLabel": "Investments",
        "verboseLabel": "Net change in unrealized appreciation (depreciation) of investments"
       }
      }
     },
     "localname": "DebtAndEquitySecuritiesUnrealizedGainLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Debt Disclosure [Abstract]"
       }
      }
     },
     "localname": "DebtDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_DebtInstrumentAxis": {
     "auth_ref": [
      "r1",
      "r2",
      "r3",
      "r106",
      "r107",
      "r120",
      "r193",
      "r283",
      "r284",
      "r285",
      "r286",
      "r287",
      "r288",
      "r289",
      "r290",
      "r291",
      "r292",
      "r293",
      "r294",
      "r295",
      "r296",
      "r297",
      "r298",
      "r387",
      "r516",
      "r517",
      "r518",
      "r519",
      "r520",
      "r633"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of debt instrument, including, but not limited to, draws against credit facilities.",
        "label": "Debt Instrument [Axis]",
        "terseLabel": "Debt Instrument [Axis]"
       }
      }
     },
     "localname": "DebtInstrumentAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesKeyTermsDetails",
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DebtInstrumentBasisSpreadOnVariableRate1": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage points added to the reference rate to compute the variable rate on the debt instrument.",
        "label": "Debt Instrument, Basis Spread on Variable Rate",
        "terseLabel": "Interest rate margin"
       }
      }
     },
     "localname": "DebtInstrumentBasisSpreadOnVariableRate1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentCarryingAmount": {
     "auth_ref": [
      "r3",
      "r107",
      "r120",
      "r300"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.",
        "label": "Long-Term Debt, Gross",
        "terseLabel": "Outstanding balance"
       }
      }
     },
     "localname": "DebtInstrumentCarryingAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtInstrumentConvertibleConversionPrice1": {
     "auth_ref": [
      "r62",
      "r285"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The price per share of the conversion feature embedded in the debt instrument.",
        "label": "Debt Instrument, Convertible, Conversion Price",
        "terseLabel": "Conversion price (in dollars per share)"
       }
      }
     },
     "localname": "DebtInstrumentConvertibleConversionPrice1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesKeyTermsDetails",
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_DebtInstrumentConvertibleConversionRatio1": {
     "auth_ref": [
      "r14",
      "r66",
      "r67",
      "r69",
      "r285"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.",
        "label": "Debt Instrument, Convertible, Conversion Ratio",
        "terseLabel": "Conversion rate"
       }
      }
     },
     "localname": "DebtInstrumentConvertibleConversionRatio1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesKeyTermsDetails",
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails"
     ],
     "xbrltype": "pureItemType"
    },
    "us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.",
        "label": "Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger",
        "terseLabel": "Exercise price adjustment percentage"
       }
      }
     },
     "localname": "DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesKeyTermsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentFaceAmount": {
     "auth_ref": [
      "r97",
      "r99",
      "r283",
      "r387",
      "r517",
      "r518"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Face (par) amount of debt instrument at time of issuance.",
        "label": "Debt Instrument, Face Amount",
        "terseLabel": "Face amount",
        "verboseLabel": "Debenture\u00a0Amount"
       }
      }
     },
     "localname": "DebtInstrumentFaceAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtInstrumentInterestRateDuringPeriod": {
     "auth_ref": [
      "r13",
      "r97",
      "r295"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The average effective interest rate during the reporting period.",
        "label": "Debt Instrument, Interest Rate During Period",
        "terseLabel": "Effective interest rate"
       }
      }
     },
     "localname": "DebtInstrumentInterestRateDuringPeriod",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebentureOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentInterestRateEffectivePercentage": {
     "auth_ref": [
      "r13",
      "r97",
      "r302",
      "r387"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.",
        "label": "Debt Instrument, Interest Rate, Effective Percentage",
        "terseLabel": "Interest\u00a0Rate"
       }
      }
     },
     "localname": "DebtInstrumentInterestRateEffectivePercentage",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentInterestRateStatedPercentage": {
     "auth_ref": [
      "r13",
      "r284"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Contractual interest rate for funds borrowed, under the debt agreement.",
        "label": "Debt Instrument, Interest Rate, Stated Percentage",
        "terseLabel": "Stated interest rate"
       }
      }
     },
     "localname": "DebtInstrumentInterestRateStatedPercentage",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Debt Instrument [Line Items]",
        "terseLabel": "Debt Instrument [Line Items]"
       }
      }
     },
     "localname": "DebtInstrumentLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesKeyTermsDetails",
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebentureOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DebtInstrumentNameDomain": {
     "auth_ref": [
      "r15",
      "r193",
      "r283",
      "r284",
      "r285",
      "r286",
      "r287",
      "r288",
      "r289",
      "r290",
      "r291",
      "r292",
      "r293",
      "r294",
      "r295",
      "r296",
      "r297",
      "r298",
      "r387",
      "r516",
      "r517",
      "r518",
      "r519",
      "r520",
      "r633"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The name for the particular debt instrument or borrowing that distinguishes it from other debt instruments or borrowings, including draws against credit facilities.",
        "label": "Debt Instrument, Name [Domain]",
        "terseLabel": "Debt Instrument, Name [Domain]"
       }
      }
     },
     "localname": "DebtInstrumentNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesKeyTermsDetails",
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DebtInstrumentRedemptionPricePercentage": {
     "auth_ref": [
      "r118"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.",
        "label": "Debt Instrument, Redemption Price, Percentage",
        "terseLabel": "Redemption as a percentage of principal"
       }
      }
     },
     "localname": "DebtInstrumentRedemptionPricePercentage",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentRepurchasedFaceAmount": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Face (par) amount of the original debt instrument that was repurchased.",
        "label": "Debt Instrument, Repurchased Face Amount",
        "terseLabel": "Purchase amount"
       }
      }
     },
     "localname": "DebtInstrumentRepurchasedFaceAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtInstrumentTable": {
     "auth_ref": [
      "r15",
      "r66",
      "r68",
      "r69",
      "r70",
      "r96",
      "r97",
      "r99",
      "r119",
      "r193",
      "r283",
      "r284",
      "r285",
      "r286",
      "r287",
      "r288",
      "r289",
      "r290",
      "r291",
      "r292",
      "r293",
      "r294",
      "r295",
      "r296",
      "r297",
      "r298",
      "r299",
      "r387",
      "r516",
      "r517",
      "r518",
      "r519",
      "r520",
      "r633"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A table or schedule providing information pertaining to long-term debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the company, if longer.",
        "label": "Schedule of Long-Term Debt Instruments [Table]",
        "terseLabel": "Schedule of Long-Term Debt Instruments [Table]"
       }
      }
     },
     "localname": "DebtInstrumentTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesKeyTermsDetails",
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebentureOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DebtInstrumentTerm": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Debt Instrument, Term",
        "terseLabel": "Term of debt"
       }
      }
     },
     "localname": "DebtInstrumentTerm",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_DebtPolicyTextBlock": {
     "auth_ref": [
      "r59"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy related to debt. Includes, but is not limited to, debt issuance costs, the effects of refinancings, method of amortizing debt issuance costs and original issue discount, and classifications of debt.",
        "label": "Debt, Policy [Policy Text Block]",
        "terseLabel": "Deferred financing costs"
       }
      }
     },
     "localname": "DebtPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DebtSecuritiesMember": {
     "auth_ref": [
      "r56"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt instrument issued by corporations, governments and governmental agencies, municipalities, and other institutions.",
        "label": "Debt Securities [Member]",
        "terseLabel": "Debt Investments"
       }
      }
     },
     "localname": "DebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DeferredChargesPolicyTextBlock": {
     "auth_ref": [
      "r168"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for deferral and amortization of significant deferred charges.",
        "label": "Deferred Charges, Policy [Policy Text Block]",
        "terseLabel": "Deferred offering costs"
       }
      }
     },
     "localname": "DeferredChargesPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DeferredFinanceCostsNet": {
     "auth_ref": [
      "r98",
      "r656"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 5.0,
       "parentTag": "us-gaap_LongTermDebt",
       "weight": -1.0
      },
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.",
        "label": "Debt Issuance Costs, Net",
        "negatedLabel": "Deferred financing costs (net of accumulated amortization)",
        "negatedTerseLabel": "Deferred financing costs (net of accumulated amortization of $49,187 and $47,531, respectively)"
       }
      }
     },
     "localname": "DeferredFinanceCostsNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredIncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r37",
      "r73",
      "r336",
      "r344",
      "r345",
      "r635"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.",
        "label": "Deferred Income Tax Expense (Benefit)",
        "verboseLabel": "Deferred income tax provision"
       }
      }
     },
     "localname": "DeferredIncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredIncomeTaxLiabilitiesNet": {
     "auth_ref": [
      "r329",
      "r330"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 6.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.",
        "label": "Deferred Income Tax Liabilities, Net",
        "terseLabel": "Deferred tax liability"
       }
      }
     },
     "localname": "DeferredIncomeTaxLiabilitiesNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_NetIncomeLossAttributableToParentDiluted",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise of dilutive convertible securities excluding adjustments related to ESOP convertible preferred stock, stock options, and restrictive stock units.",
        "label": "Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities",
        "terseLabel": "Adjustment for interest on Convertible Notes and incentive fees,\u00a0net"
       }
      }
     },
     "localname": "DilutiveSecuritiesEffectOnBasicEarningsPerShareOther",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DistributionPayable": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Distribution Payable",
        "terseLabel": "Distribution payable"
       }
      }
     },
     "localname": "DistributionPayable",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DividendAndInterestReceivable": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 4.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Dividend and Interest Receivable",
        "terseLabel": "Interest and dividend receivable"
       }
      }
     },
     "localname": "DividendAndInterestReceivable",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DividendIncomeOperating": {
     "auth_ref": [
      "r116"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of operating dividend income on securities.",
        "label": "Dividend Income, Operating",
        "terseLabel": "Dividend income",
        "verboseLabel": "Dividend Income"
       }
      }
     },
     "localname": "DividendIncomeOperating",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DividendIncomeOperatingPaidInCash": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 2.0,
       "parentTag": "us-gaap_GrossInvestmentIncomeOperating",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Dividend Income, Operating, Paid in Cash",
        "terseLabel": "Dividend income"
       }
      }
     },
     "localname": "DividendIncomeOperatingPaidInCash",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DividendIncomeOperatingPaidInKind": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 3.0,
       "parentTag": "us-gaap_GrossInvestmentIncomeOperating",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Dividend Income, Operating, Paid in Kind",
        "terseLabel": "Non-cash dividend income",
        "verboseLabel": "Investment income, dividend, paid-in-kind"
       }
      }
     },
     "localname": "DividendIncomeOperatingPaidInKind",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DividendsAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information about distribution of earnings to shareholders including, but not limited to, cash, property or capital stock.",
        "label": "Dividends [Axis]",
        "terseLabel": "Dividends [Axis]"
       }
      }
     },
     "localname": "DividendsAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SubsequentEventsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DividendsDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Distributions of earnings to shareholders including but not limited to cash, property or capital stock.",
        "label": "Dividends [Domain]",
        "terseLabel": "Dividends [Domain]"
       }
      }
     },
     "localname": "DividendsDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SubsequentEventsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DueFromAffiliates": {
     "auth_ref": [
      "r100",
      "r131",
      "r397"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 5.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For an unclassified balance sheet, amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership.",
        "label": "Due from Affiliates",
        "terseLabel": "Receivable from affiliates"
       }
      }
     },
     "localname": "DueFromAffiliates",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DueToAffiliateCurrentAndNoncurrent": {
     "auth_ref": [
      "r100",
      "r111",
      "r130",
      "r154",
      "r400"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 5.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.",
        "label": "Due to Affiliate",
        "terseLabel": "Payable to affiliates",
        "verboseLabel": "Affiliate borrowings outstanding"
       }
      }
     },
     "localname": "DueToAffiliateCurrentAndNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EarningsPerShareAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Earnings Per Share [Abstract]"
       }
      }
     },
     "localname": "EarningsPerShareAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_EarningsPerShareBasic": {
     "auth_ref": [
      "r182",
      "r203",
      "r204",
      "r205",
      "r206",
      "r207",
      "r214",
      "r216",
      "r221",
      "r222",
      "r223",
      "r227",
      "r357",
      "r358",
      "r452",
      "r455",
      "r510"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.",
        "label": "Earnings Per Share, Basic",
        "terseLabel": "Basic earnings per share (in dollars per share)"
       }
      }
     },
     "localname": "EarningsPerShareBasic",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerShareBasicAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Earnings Per Share, Basic [Abstract]",
        "terseLabel": "Earnings per share\u2014basic"
       }
      }
     },
     "localname": "EarningsPerShareBasicAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EarningsPerShareDiluted": {
     "auth_ref": [
      "r182",
      "r203",
      "r204",
      "r205",
      "r206",
      "r207",
      "r216",
      "r221",
      "r222",
      "r223",
      "r227",
      "r357",
      "r358",
      "r452",
      "r455",
      "r510"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.",
        "label": "Earnings Per Share, Diluted",
        "terseLabel": "Diluted earnings per share (in dollars per share)"
       }
      }
     },
     "localname": "EarningsPerShareDiluted",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerShareDilutedAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Earnings Per Share, Diluted [Abstract]",
        "terseLabel": "Earnings per share\u2014diluted"
       }
      }
     },
     "localname": "EarningsPerShareDilutedAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EarningsPerSharePolicyTextBlock": {
     "auth_ref": [
      "r47",
      "r48"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.",
        "label": "Earnings Per Share, Policy [Policy Text Block]",
        "terseLabel": "Earnings per share"
       }
      }
     },
     "localname": "EarningsPerSharePolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_EarningsPerShareTextBlock": {
     "auth_ref": [
      "r224",
      "r225",
      "r226",
      "r228"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for earnings per share.",
        "label": "Earnings Per Share [Text Block]",
        "terseLabel": "Earnings Per Share"
       }
      }
     },
     "localname": "EarningsPerShareTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/EarningsPerShare"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations": {
     "auth_ref": [
      "r665"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) from effect of exchange rate changes on cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; held in foreign currencies; including, but not limited to, disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations",
        "terseLabel": "Effect of foreign exchange rate changes on cash and cash equivalents"
       }
      }
     },
     "localname": "EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EnergySectorMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Energy Sector [Member]",
        "terseLabel": "Energy"
       }
      }
     },
     "localname": "EnergySectorMember",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Equity [Abstract]"
       }
      }
     },
     "localname": "EquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_EquityComponentDomain": {
     "auth_ref": [
      "r65",
      "r163",
      "r178",
      "r179",
      "r180",
      "r194",
      "r195",
      "r196",
      "r200",
      "r208",
      "r210",
      "r229",
      "r255",
      "r311",
      "r324",
      "r325",
      "r326",
      "r338",
      "r339",
      "r356",
      "r377",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r391",
      "r458",
      "r459",
      "r460"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Components of equity are the parts of the total Equity balance including that which is allocated to common, preferred, treasury stock, retained earnings, etc.",
        "label": "Equity Component [Domain]",
        "terseLabel": "Equity Component [Domain]"
       }
      }
     },
     "localname": "EquityComponentDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets",
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquitySecuritiesByIndustryAxis": {
     "auth_ref": [
      "r513"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by industry sector, examples include but are not limited to, commercial, industrial, agricultural, financial services, technology, healthcare and real estate.",
        "label": "Industry Sector [Axis]",
        "terseLabel": "Industry Sector [Axis]"
       }
      }
     },
     "localname": "EquitySecuritiesByIndustryAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EquitySecuritiesIndustryMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Industry sector consisting of government, private and corporate entities engaged in business activities, including but not limited to, commercial, industrial, agricultural, financial services, technology, healthcare and real estate.",
        "label": "Industry Sector [Domain]",
        "terseLabel": "Industry Sector [Domain]"
       }
      }
     },
     "localname": "EquitySecuritiesIndustryMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquitySecuritiesMember": {
     "auth_ref": [
      "r56",
      "r121",
      "r532",
      "r533",
      "r534"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Ownership interest or right to acquire or dispose of ownership interest in corporations and other legal entities for which ownership interest is represented by shares of common or preferred stock, convertible securities, stock rights, or stock warrants.",
        "label": "Equity Securities [Member]",
        "terseLabel": "Equity"
       }
      }
     },
     "localname": "EquitySecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EstimateOfFairValueFairValueDisclosureMember": {
     "auth_ref": [
      "r291",
      "r372",
      "r517",
      "r518"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measured as an estimate of fair value.",
        "label": "Estimate of Fair Value Measurement [Member]",
        "terseLabel": "Fair Value"
       }
      }
     },
     "localname": "EstimateOfFairValueFairValueDisclosureMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]",
        "terseLabel": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueFairValueLevelsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable": {
     "auth_ref": [
      "r362",
      "r363",
      "r370"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about asset and liability measured at fair value on recurring and nonrecurring basis.",
        "label": "Fair Value, Recurring and Nonrecurring [Table]",
        "terseLabel": "Fair Value, Recurring and Nonrecurring [Table]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueFairValueLevelsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Fair Value Measurement Inputs and Valuation Techniques [Line Items]",
        "terseLabel": "Fair Value Measurement Inputs and Valuation Techniques [Line Items]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable": {
     "auth_ref": [
      "r84"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.",
        "label": "Fair Value Measurement Inputs and Valuation Techniques [Table]",
        "terseLabel": "Fair Value Measurement Inputs and Valuation Techniques [Table]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock": {
     "auth_ref": [
      "r84"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.",
        "label": "Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]",
        "terseLabel": "Schedule of Fair Value Measurement Inputs and Valuation Techniques"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss": {
     "auth_ref": [
      "r367"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held.",
        "label": "Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)",
        "terseLabel": "Unrealized appreciation (depreciation) for the period relating\u00a0to those Level\u00a0III assets that were\u00a0still held by the\u00a0Company at the end of\u00a0the\u00a0period:"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock": {
     "auth_ref": [
      "r82",
      "r83"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).",
        "label": "Fair Value, Assets Measured on Recurring Basis [Table Text Block]",
        "terseLabel": "Schedule of Portfolio Investments by Level in the Fair Value Hierarchy"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain": {
     "auth_ref": [
      "r85"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Class of asset.",
        "label": "Asset Class [Domain]",
        "terseLabel": "Asset Class [Domain]"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]",
        "terseLabel": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]",
        "terseLabel": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable": {
     "auth_ref": [
      "r85",
      "r87"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule of information required and determined to be provided for purposes of reconciling beginning and ending balances of fair value measurements of assets using significant unobservable inputs (level 3). Such reconciliation, separately presenting changes during the period, at a minimum, may include, but is not limited to: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.",
        "label": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]",
        "terseLabel": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock": {
     "auth_ref": [
      "r85",
      "r87"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.",
        "label": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]",
        "terseLabel": "Changes in Level III Portfolio Investments"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueByAssetClassAxis": {
     "auth_ref": [
      "r82",
      "r87"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by class of asset.",
        "label": "Asset Class [Axis]",
        "terseLabel": "Asset Class [Axis]"
       }
      }
     },
     "localname": "FairValueByAssetClassAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByFairValueHierarchyLevelAxis": {
     "auth_ref": [
      "r291",
      "r313",
      "r314",
      "r315",
      "r316",
      "r317",
      "r318",
      "r363",
      "r407",
      "r408",
      "r409",
      "r517",
      "r518",
      "r523",
      "r524",
      "r525"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by level within fair value hierarchy and fair value measured at net asset value per share as practical expedient.",
        "label": "Fair Value Hierarchy and NAV [Axis]",
        "terseLabel": "Fair Value Hierarchy and NAV [Axis]"
       }
      }
     },
     "localname": "FairValueByFairValueHierarchyLevelAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueFairValueLevelsDetails",
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByMeasurementBasisAxis": {
     "auth_ref": [
      "r82",
      "r88",
      "r291",
      "r517",
      "r518"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by measurement basis.",
        "label": "Measurement Basis [Axis]",
        "terseLabel": "Measurement Basis [Axis]"
       }
      }
     },
     "localname": "FairValueByMeasurementBasisAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]",
        "terseLabel": "Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]"
       }
      }
     },
     "localname": "FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosureItemAmountsDomain": {
     "auth_ref": [
      "r291",
      "r517",
      "r518"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement basis, for example, but not limited to, reported value, fair value, portion at fair value, portion at other than fair value.",
        "label": "Fair Value Measurement [Domain]",
        "terseLabel": "Fair Value Measurement [Domain]"
       }
      }
     },
     "localname": "FairValueDisclosureItemAmountsDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable": {
     "auth_ref": [
      "r369"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about fair value of asset and liability not measured at fair value.",
        "label": "Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table]",
        "terseLabel": "Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table]"
       }
      }
     },
     "localname": "FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTableTextBlock": {
     "auth_ref": [
      "r369"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of information about fair value of asset and liability not measured at fair value.",
        "label": "Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table Text Block]",
        "terseLabel": "Schedule of Principal Amounts and Fair Values of Borrowings"
       }
      }
     },
     "localname": "FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueDisclosuresAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fair Value Disclosures [Abstract]"
       }
      }
     },
     "localname": "FairValueDisclosuresAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosuresTextBlock": {
     "auth_ref": [
      "r368"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.",
        "label": "Fair Value Disclosures [Text Block]",
        "terseLabel": "Fair Value"
       }
      }
     },
     "localname": "FairValueDisclosuresTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValue"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueInputsLevel1Member": {
     "auth_ref": [
      "r291",
      "r313",
      "r318",
      "r363",
      "r407",
      "r523",
      "r524",
      "r525"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Quoted prices in active markets for identical assets or liabilities that the reporting entity can access at the measurement date.",
        "label": "Fair Value, Inputs, Level 1 [Member]",
        "terseLabel": "Level\u00a0I"
       }
      }
     },
     "localname": "FairValueInputsLevel1Member",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueFairValueLevelsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel2Member": {
     "auth_ref": [
      "r291",
      "r313",
      "r318",
      "r363",
      "r408",
      "r517",
      "r518",
      "r523",
      "r524",
      "r525"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Inputs other than quoted prices included within level 1 that are observable for an asset or liability, either directly or indirectly, including, but not limited to, quoted prices for similar assets or liabilities in active markets, or quoted prices for identical or similar assets or liabilities in inactive markets.",
        "label": "Fair Value, Inputs, Level 2 [Member]",
        "terseLabel": "Level\u00a0II"
       }
      }
     },
     "localname": "FairValueInputsLevel2Member",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueFairValueLevelsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel3Member": {
     "auth_ref": [
      "r291",
      "r313",
      "r314",
      "r315",
      "r316",
      "r317",
      "r318",
      "r363",
      "r409",
      "r517",
      "r518",
      "r523",
      "r524",
      "r525"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Inputs, Level 3 [Member]",
        "terseLabel": "Level\u00a0III"
       }
      }
     },
     "localname": "FairValueInputsLevel3Member",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueFairValueLevelsDetails",
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementPolicyPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for fair value measurements of financial and non-financial assets, liabilities and instruments classified in shareholders' equity. Disclosures include, but are not limited to, how an entity that manages a group of financial assets and liabilities on the basis of its net exposure measures the fair value of those assets and liabilities.",
        "label": "Fair Value Measurement, Policy [Policy Text Block]",
        "terseLabel": "Fair value"
       }
      }
     },
     "localname": "FairValueMeasurementPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1": {
     "auth_ref": [
      "r365"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings",
        "terseLabel": "Total gains or losses included in earnings"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases": {
     "auth_ref": [
      "r86"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases",
        "terseLabel": "Purchases, including capitalized PIK and revolver fundings"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3": {
     "auth_ref": [
      "r366"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3",
        "terseLabel": "Transfers into Level III"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3": {
     "auth_ref": [
      "r366"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3",
        "negatedTerseLabel": "Transfers out of Level III"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue": {
     "auth_ref": [
      "r85"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value",
        "periodEndLabel": "Ending balance",
        "periodStartLabel": "Beginning balance"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": {
     "auth_ref": [
      "r291",
      "r313",
      "r314",
      "r315",
      "r316",
      "r317",
      "r318",
      "r407",
      "r408",
      "r409",
      "r517",
      "r518",
      "r523",
      "r524",
      "r525"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Categories used to prioritize the inputs to valuation techniques to measure fair value.",
        "label": "Fair Value Hierarchy and NAV [Domain]",
        "terseLabel": "Fair Value Hierarchy and NAV [Domain]"
       }
      }
     },
     "localname": "FairValueMeasurementsFairValueHierarchyDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueFairValueLevelsDetails",
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FinancialInstrumentAxis": {
     "auth_ref": [
      "r251",
      "r252",
      "r258",
      "r259",
      "r260",
      "r261",
      "r262",
      "r263",
      "r264",
      "r265",
      "r299",
      "r309",
      "r354",
      "r404",
      "r405",
      "r406",
      "r407",
      "r408",
      "r409",
      "r410",
      "r411",
      "r412",
      "r413",
      "r414",
      "r415",
      "r416",
      "r417",
      "r419",
      "r420",
      "r421",
      "r422",
      "r423",
      "r424",
      "r425",
      "r426",
      "r427",
      "r428",
      "r429",
      "r430",
      "r431",
      "r432",
      "r433",
      "r434",
      "r515",
      "r644",
      "r645",
      "r646",
      "r679",
      "r680",
      "r681",
      "r682",
      "r683",
      "r684",
      "r685"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of financial instrument.",
        "label": "Financial Instrument [Axis]",
        "terseLabel": "Financial Instrument [Axis]"
       }
      }
     },
     "localname": "FinancialInstrumentAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueFairValueLevelsDetails",
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancialServicesSectorMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sector of the economy consisting of companies engaged in financial services.",
        "label": "Financial Services Sector [Member]",
        "terseLabel": "Financial Services"
       }
      }
     },
     "localname": "FinancialServicesSectorMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ForeignCurrencyTransactionGainLossRealized": {
     "auth_ref": [
      "r663",
      "r664"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      },
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 2.0,
       "parentTag": "us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionOperatingAfterTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement.",
        "label": "Foreign Currency Transaction Gain (Loss), Realized",
        "negatedTerseLabel": "Net realized gains on translation of assets and liabilities in foreign currencies",
        "terseLabel": "Foreign currency"
       }
      }
     },
     "localname": "ForeignCurrencyTransactionGainLossRealized",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ForeignCurrencyTransactionGainLossUnrealized": {
     "auth_ref": [
      "r38",
      "r663",
      "r664"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      },
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 5.0,
       "parentTag": "us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionOperatingAfterTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before tax of foreign currency transaction unrealized gain (loss) recognized in the income statement.",
        "label": "Foreign Currency Transaction Gain (Loss), Unrealized",
        "negatedTerseLabel": "Net change in unrealized (appreciation) depreciation on translation of assets and liabilities in foreign currencies",
        "terseLabel": "Foreign currency"
       }
      }
     },
     "localname": "ForeignCurrencyTransactionGainLossUnrealized",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock": {
     "auth_ref": [
      "r384"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for (1) transactions denominated in a currency other than the reporting enterprise's functional currency, (2) translating foreign currency financial statements that are incorporated into the financial statements of the reporting enterprise by consolidation, combination, or the equity method of accounting, and (3) remeasurement of the financial statements of a foreign reporting enterprise in a hyperinflationary economy.",
        "label": "Foreign Currency Transactions and Translations Policy [Policy Text Block]",
        "terseLabel": "Foreign securities"
       }
      }
     },
     "localname": "ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_GrossInvestmentIncomeOperating": {
     "auth_ref": [
      "r133"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 2.0,
       "parentTag": "us-gaap_NetInvestmentIncome",
       "weight": 1.0
      },
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.",
        "label": "Gross Investment Income, Operating",
        "totalLabel": "Total investment income"
       }
      }
     },
     "localname": "GrossInvestmentIncomeOperating",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HealthcareSectorMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sector of the economy consisting of companies engaged in healthcare-related business activities.",
        "label": "Healthcare Sector [Member]",
        "terseLabel": "Healthcare"
       }
      }
     },
     "localname": "HealthcareSectorMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_IncentiveFeeExpense": {
     "auth_ref": [
      "r101"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 3.0,
       "parentTag": "us-gaap_InvestmentIncomeInvestmentExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expense for incentive rights held by the managing member or general partner, of limited liability company (LLC) or limited partnership (LP).",
        "label": "Incentive Fee Expense",
        "terseLabel": "Incentive fee"
       }
      }
     },
     "localname": "IncentiveFeeExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsManagementFeesandIncentiveFeesDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncentiveFeePayable": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 3.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Incentive Fee Payable",
        "terseLabel": "Incentive fee payable"
       }
      }
     },
     "localname": "IncentiveFeePayable",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsManagementFeesandIncentiveFeesDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeStatementAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Income Statement [Abstract]"
       }
      }
     },
     "localname": "IncomeStatementAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeStatementLocationAxis": {
     "auth_ref": [
      "r266",
      "r267"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by location in the income statement.",
        "label": "Income Statement Location [Axis]",
        "terseLabel": "Income Statement Location [Axis]"
       }
      }
     },
     "localname": "IncomeStatementLocationAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeStatementLocationDomain": {
     "auth_ref": [
      "r267"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Location in the income statement.",
        "label": "Income Statement Location [Domain]",
        "terseLabel": "Income Statement Location [Domain]"
       }
      }
     },
     "localname": "IncomeStatementLocationDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_IncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r189",
      "r209",
      "r210",
      "r239",
      "r331",
      "r343",
      "r346",
      "r456"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.",
        "label": "Income Tax Expense (Benefit)",
        "verboseLabel": "Income tax provision"
       }
      }
     },
     "localname": "IncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxPolicyTextBlock": {
     "auth_ref": [
      "r177",
      "r327",
      "r328",
      "r332",
      "r333",
      "r334",
      "r337"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.",
        "label": "Income Tax, Policy [Policy Text Block]",
        "terseLabel": "Incomes taxes"
       }
      }
     },
     "localname": "IncomeTaxPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IncomeTaxesPaid": {
     "auth_ref": [
      "r34",
      "r41"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.",
        "label": "Income Taxes Paid",
        "terseLabel": "Income taxes paid"
       }
      }
     },
     "localname": "IncomeTaxesPaid",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseDueFromAffiliates": {
     "auth_ref": [
      "r36"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 15.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in receivables to be collected from an entity that is controlling, under the control of, or within the same control group as the reporting entity by means of direct or indirect ownership.",
        "label": "Increase (Decrease) Due from Affiliates",
        "negatedTerseLabel": "Receivable from affiliates"
       }
      }
     },
     "localname": "IncreaseDecreaseDueFromAffiliates",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInDueToAffiliates": {
     "auth_ref": [
      "r36"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 20.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) in obligations owed to an entity that is controlling, under the control of, or within the same control group as the reporting entity by means of direct or indirect ownership.",
        "label": "Increase (Decrease) in Due to Affiliates",
        "terseLabel": "Payable to affiliates"
       }
      }
     },
     "localname": "IncreaseDecreaseInDueToAffiliates",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInIncentiveFeePayable": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 18.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Increase (Decrease) in Incentive Fee Payable",
        "terseLabel": "Incentive fee payable"
       }
      }
     },
     "localname": "IncreaseDecreaseInIncentiveFeePayable",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable": {
     "auth_ref": [
      "r36"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 14.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the aggregate amount due to the entity in the form of unpaid interest and dividends.",
        "label": "Increase (Decrease) in Interest and Dividends Receivable",
        "negatedTerseLabel": "Interest and dividend receivable"
       }
      }
     },
     "localname": "IncreaseDecreaseInInterestAndDividendsReceivable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInInterestPayableNet": {
     "auth_ref": [
      "r36"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 21.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in interest payable, which represents the amount owed to note holders, bond holders, and other parties for interest earned on loans or credit extended to the reporting entity.",
        "label": "Increase (Decrease) in Interest Payable, Net",
        "terseLabel": "Interest payable"
       }
      }
     },
     "localname": "IncreaseDecreaseInInterestPayableNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInManagementFeePayable": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 17.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Increase (Decrease) in Management Fee Payable",
        "terseLabel": "Management fee payable"
       }
      }
     },
     "localname": "IncreaseDecreaseInManagementFeePayable",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInOperatingAssetsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Increase (Decrease) in Operating Assets [Abstract]",
        "terseLabel": "(Increase) decrease in operating assets:"
       }
      }
     },
     "localname": "IncreaseDecreaseInOperatingAssetsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Increase (Decrease) in Operating Liabilities [Abstract]",
        "terseLabel": "Increase (decrease) in operating liabilities:"
       }
      }
     },
     "localname": "IncreaseDecreaseInOperatingLiabilitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncreaseDecreaseInOtherOperatingAssets": {
     "auth_ref": [
      "r36"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 16.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in operating assets classified as other.",
        "label": "Increase (Decrease) in Other Operating Assets",
        "negatedTerseLabel": "Other assets"
       }
      }
     },
     "localname": "IncreaseDecreaseInOtherOperatingAssets",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInOtherOperatingLiabilities": {
     "auth_ref": [
      "r36"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 23.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in operating liabilities classified as other.",
        "label": "Increase (Decrease) in Other Operating Liabilities",
        "terseLabel": "Other liabilities"
       }
      }
     },
     "localname": "IncreaseDecreaseInOtherOperatingLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInPayableForInvestmentPurchased": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 19.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Increase (Decrease) in Payable for Investment Purchased",
        "terseLabel": "Payable for unsettled securities purchased"
       }
      }
     },
     "localname": "IncreaseDecreaseInPayableForInvestmentPurchased",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities": {
     "auth_ref": [
      "r218",
      "r219",
      "r223"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible debt securities using the if-converted method.",
        "label": "Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities",
        "terseLabel": "Adjustment for dilutive effect of Convertible Notes (in shares)"
       }
      }
     },
     "localname": "IncrementalCommonSharesAttributableToConversionOfDebtSecurities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_InterestExpense": {
     "auth_ref": [
      "r98",
      "r117",
      "r181",
      "r238",
      "r385"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 1.0,
       "parentTag": "us-gaap_InvestmentIncomeInvestmentExpense",
       "weight": 1.0
      },
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_InvestmentIncomeInvestmentExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the cost of borrowed funds accounted for as interest expense.",
        "label": "Interest Expense",
        "terseLabel": "Interest and other financing expenses"
       }
      }
     },
     "localname": "InterestExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpenseDebt": {
     "auth_ref": [
      "r24",
      "r296",
      "r303",
      "r519",
      "r520"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the cost of borrowed funds accounted for as interest expense for debt.",
        "label": "Interest Expense, Debt",
        "terseLabel": "Interest expense"
       }
      }
     },
     "localname": "InterestExpenseDebt",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebentureOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpensePolicyTextBlock": {
     "auth_ref": [
      "r95"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for recognizing interest expense, including the method of amortizing debt issuance costs.",
        "label": "Interest Expense, Policy [Policy Text Block]",
        "terseLabel": "Interest and other financing expenses"
       }
      }
     },
     "localname": "InterestExpensePolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InterestIncomeOperating": {
     "auth_ref": [
      "r21"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_GrossInvestmentIncomeOperating",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of operating interest income, including, but not limited to, amortization and accretion of premiums and discounts on securities.",
        "label": "Interest Income, Operating",
        "terseLabel": "Interest income",
        "verboseLabel": "Interest Income"
       }
      }
     },
     "localname": "InterestIncomeOperating",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestIncomeOperatingPaidInCash": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 1.0,
       "parentTag": "us-gaap_GrossInvestmentIncomeOperating",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Interest Income, Operating, Paid in Cash",
        "terseLabel": "Interest income (excluding Payment-in-kind (\"PIK\") interest income)"
       }
      }
     },
     "localname": "InterestIncomeOperatingPaidInCash",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestIncomeOperatingPaidInKind": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 4.0,
       "parentTag": "us-gaap_GrossInvestmentIncomeOperating",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Interest Income, Operating, Paid in Kind",
        "negatedTerseLabel": "Reversal of previously recorded PIK interest",
        "terseLabel": "PIK interest income",
        "verboseLabel": "Investment income, interest, paid-in-kind"
       }
      }
     },
     "localname": "InterestIncomeOperatingPaidInKind",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestPaidNet": {
     "auth_ref": [
      "r183",
      "r186",
      "r187"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.",
        "label": "Interest Paid, Excluding Capitalized Interest, Operating Activities",
        "terseLabel": "Cash interest paid"
       }
      }
     },
     "localname": "InterestPaidNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestPayableCurrentAndNoncurrent": {
     "auth_ref": [
      "r112",
      "r129"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 4.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of interest payable on debt, including, but not limited to, trade payables.",
        "label": "Interest Payable",
        "terseLabel": "Interest payable"
       }
      }
     },
     "localname": "InterestPayableCurrentAndNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentAffiliatedIssuerControlledMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment, Affiliated Issuer, Controlled [Member]",
        "terseLabel": "Controlled"
       }
      }
     },
     "localname": "InvestmentAffiliatedIssuerControlledMember",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment, Affiliated Issuer, Noncontrolled [Member]",
        "terseLabel": "Non-controlled/Affiliated"
       }
      }
     },
     "localname": "InvestmentAffiliatedIssuerNoncontrolledMember",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InvestmentBasisSpreadVariableRate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment, Basis Spread, Variable Rate",
        "terseLabel": "Spread"
       }
      }
     },
     "localname": "InvestmentBasisSpreadVariableRate",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_InvestmentCompanyAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company [Abstract]"
       }
      }
     },
     "localname": "InvestmentCompanyAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Capital Share Transactions [Abstract]",
        "terseLabel": "Capital transactions"
       }
      }
     },
     "localname": "InvestmentCompanyCapitalShareTransactionsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Capital Share Transactions, Stock Issued [Abstract]",
        "terseLabel": "Capital share activity"
       }
      }
     },
     "localname": "InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentCompanyChangesInNetAssetsLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Changes in Net Assets [Line Items]",
        "terseLabel": "Investment Company, Changes in Net Assets [Line Items]"
       }
      }
     },
     "localname": "InvestmentCompanyChangesInNetAssetsLineItems",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsNarrativeDetails",
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentCompanyChangesInNetAssetsTable": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Changes in Net Assets [Table]",
        "terseLabel": "Investment Company, Changes in Net Assets [Table]"
       }
      }
     },
     "localname": "InvestmentCompanyChangesInNetAssetsTable",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsNarrativeDetails",
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentCompanyChangesInNetAssetsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Changes in Net Assets [Table Text Block]",
        "terseLabel": "Schedule of Net Assets"
       }
      }
     },
     "localname": "InvestmentCompanyChangesInNetAssetsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentCompanyContractualFeeWaived": {
     "auth_ref": [
      "r137"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 2.0,
       "parentTag": "us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of fee contractually waived by investment company.",
        "label": "Investment Company, Contractual Fee Waived",
        "negatedTerseLabel": "Less: management fee waived (See Note 5)"
       }
      }
     },
     "localname": "InvestmentCompanyContractualFeeWaived",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentCompanyDistributionPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Distribution [Policy Text Block]",
        "terseLabel": "Distributions"
       }
      }
     },
     "localname": "InvestmentCompanyDistributionPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentCompanyDistributionToShareholdersPerShare": {
     "auth_ref": [
      "r149"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Per share or unit amount of distribution to shareholders. Includes, but is not limited to, dividend and capital gain. Excludes distribution for tax return of capital.",
        "label": "Investment Company, Distribution to Shareholders, Per Share",
        "negatedTerseLabel": "Distributions declared to stockholders from net investment income (in dollars per share)"
       }
      }
     },
     "localname": "InvestmentCompanyDistributionToShareholdersPerShare",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_InvestmentCompanyDividendDistribution": {
     "auth_ref": [
      "r138",
      "r139"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets": {
       "order": 3.0,
       "parentTag": "nmfc_InvestmentCompanyCapitalTransactionsIncreaseDecrease",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of dividend distribution from ordinary income and capital gain. Excludes distribution for tax return of capital.",
        "label": "Investment Company, Dividend Distribution",
        "negatedLabel": "Distributions declared",
        "negatedTerseLabel": "Distributions declared to stockholders from net investment income"
       }
      }
     },
     "localname": "InvestmentCompanyDividendDistribution",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets",
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 1.0,
       "parentTag": "us-gaap_NetInvestmentIncome",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Expense, after Reduction of Fee Waiver and Reimbursement",
        "totalLabel": "Net expenses"
       }
      }
     },
     "localname": "InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentCompanyFeePaidIndirectly": {
     "auth_ref": [
      "r136"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount that would have been incurred for brokerage service had service been paid for directly in arm's-length transaction.",
        "label": "Investment Company, Fee Paid Indirectly",
        "terseLabel": "Indirect administrative expenses"
       }
      }
     },
     "localname": "InvestmentCompanyFeePaidIndirectly",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentCompanyFinancialHighlightsLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Investment Company, Financial Highlights [Line Items]",
        "terseLabel": "Investment Company, Financial Highlights [Line Items]"
       }
      }
     },
     "localname": "InvestmentCompanyFinancialHighlightsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentCompanyFinancialHighlightsRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Investment Company, Financial Highlights [Roll Forward]",
        "terseLabel": "Investment Company, Financial Highlights [Roll Forward]"
       }
      }
     },
     "localname": "InvestmentCompanyFinancialHighlightsRollForward",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentCompanyFinancialHighlightsTable": {
     "auth_ref": [
      "r140"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about financial highlights. Includes, but is not limited to, per share information, income and expense ratios, total return, capital commitment and fee waiver.",
        "label": "Investment Company, Financial Highlights [Table]",
        "terseLabel": "Investment Company, Financial Highlights [Table]"
       }
      }
     },
     "localname": "InvestmentCompanyFinancialHighlightsTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock": {
     "auth_ref": [
      "r140"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of financial highlights. Includes, but is not limited to, per share information, income and expense ratios, total return, capital commitment and fee waiver.",
        "label": "Investment Company, Financial Highlights [Table Text Block]",
        "terseLabel": "Schedule of Financial Highlights"
       }
      }
     },
     "localname": "InvestmentCompanyFinancialHighlightsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentCompanyFinancialHighlightsTextBlock": {
     "auth_ref": [
      "r151",
      "r467"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure of financial highlights reported by investment company.",
        "label": "Investment Company, Financial Highlights [Text Block]",
        "terseLabel": "Financial Highlights"
       }
      }
     },
     "localname": "InvestmentCompanyFinancialHighlightsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlights"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare": {
     "auth_ref": [
      "r147"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Per share or unit amount of realized and unrealized gain (loss) on investment.",
        "label": "Investment Company, Gain (Loss) on Investment, Per Share",
        "terseLabel": "Net realized and unrealized (losses) gains (in dollars per share)"
       }
      }
     },
     "localname": "InvestmentCompanyGainLossOnInvestmentPerShare",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare": {
     "auth_ref": [
      "r148"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Per share or unit amount of investment income (loss) and realized and unrealized gain (loss) on investment.",
        "label": "Investment Company, Investment Income (Loss) from Operations, Per Share",
        "totalLabel": "Total net increase (in dollars per share)"
       }
      }
     },
     "localname": "InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare": {
     "auth_ref": [
      "r146"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Per share or unit amount, after investment expense, of dividend and interest investment income (loss).",
        "label": "Investment Company, Investment Income (Loss), Per Share",
        "terseLabel": "Net investment income (in dollars per share)"
       }
      }
     },
     "localname": "InvestmentCompanyInvestmentIncomeLossPerShare",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_InvestmentCompanyInvestmentIncomeLossRatio": {
     "auth_ref": [
      "r141"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of investment income (loss) to average net assets.",
        "label": "Investment Company, Investment Income (Loss) Ratio",
        "terseLabel": "Net investment income"
       }
      }
     },
     "localname": "InvestmentCompanyInvestmentIncomeLossRatio",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_InvestmentCompanyMarketValuePerShare": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Market Value Per Share",
        "terseLabel": "Per share market value (in dollars per share)"
       }
      }
     },
     "localname": "InvestmentCompanyMarketValuePerShare",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_InvestmentCompanyNetAssetsFromOperationsIncreaseDecreaseAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Net Assets from Operations, Increase (Decrease) [Abstract]",
        "terseLabel": "Increase (decrease) in net assets resulting from operations:"
       }
      }
     },
     "localname": "InvestmentCompanyNetAssetsFromOperationsIncreaseDecreaseAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentCompanyNetAssetsRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Investment Company, Net Assets [Roll Forward]",
        "terseLabel": "Investment Company, Net Assets [Roll Forward]"
       }
      }
     },
     "localname": "InvestmentCompanyNetAssetsRollForward",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets",
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Nonconsolidated Subsidiary [Axis]",
        "terseLabel": "Investment Company, Nonconsolidated Subsidiary [Axis]"
       }
      }
     },
     "localname": "InvestmentCompanyNonconsolidatedSubsidiaryAxis",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Nonconsolidated Subsidiary [Domain]",
        "terseLabel": "Investment Company, Nonconsolidated Subsidiary [Domain]"
       }
      }
     },
     "localname": "InvestmentCompanyNonconsolidatedSubsidiaryDomain",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Nonconsolidated Subsidiary [Line Items]",
        "terseLabel": "Investment Company, Nonconsolidated Subsidiary [Line Items]"
       }
      }
     },
     "localname": "InvestmentCompanyNonconsolidatedSubsidiaryLineItems",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentCompanyNonconsolidatedSubsidiarySummarizedFinancialInformationTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Nonconsolidated Subsidiary, Summarized Financial Information [Table Text Block]",
        "terseLabel": "Schedule of Summarized Financial Information for Nonconsolidated Entities"
       }
      }
     },
     "localname": "InvestmentCompanyNonconsolidatedSubsidiarySummarizedFinancialInformationTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Nonconsolidated Subsidiary [Table]",
        "terseLabel": "Investment Company, Nonconsolidated Subsidiary [Table]"
       }
      }
     },
     "localname": "InvestmentCompanyNonconsolidatedSubsidiaryTable",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentCompanyPortfolioTurnover": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Portfolio Turnover",
        "terseLabel": "Portfolio turnover"
       }
      }
     },
     "localname": "InvestmentCompanyPortfolioTurnover",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Senior Security, Indebtedness, Asset Coverage Ratio",
        "terseLabel": "Asset coverage ratio"
       }
      }
     },
     "localname": "InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsGeneralNarrativeDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_InvestmentCompanyTotalReturn": {
     "auth_ref": [
      "r142",
      "r143",
      "r144"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage increase (decrease) in fund net asset value, assuming reinvestment of dividends and capital gain distributions.",
        "label": "Investment Company, Total Return",
        "terseLabel": "Total return based on net asset value"
       }
      }
     },
     "localname": "InvestmentCompanyTotalReturn",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_InvestmentCompanyTotalReturnMarketValue": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Company, Total Return, Market Value",
        "terseLabel": "Total return based on market value"
       }
      }
     },
     "localname": "InvestmentCompanyTotalReturnMarketValue",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_InvestmentCompanyVoluntaryFeeWaived": {
     "auth_ref": [
      "r137"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 3.0,
       "parentTag": "us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of fee voluntarily waived by investment company.",
        "label": "Investment Company, Voluntary Fee Waived",
        "negatedTerseLabel": "Less: expenses waived and reimbursed (See Note\u00a05)",
        "terseLabel": "Fees waived by the administrator"
       }
      }
     },
     "localname": "InvestmentCompanyVoluntaryFeeWaived",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of data and information required in the supplementary schedule applicable to management investment companies listing holdings of unaffiliated investments.",
        "label": "Investment Holdings, Schedule of Investments [Table Text Block]",
        "terseLabel": "Schedule of Investments"
       }
      }
     },
     "localname": "InvestmentHoldingsScheduleOfInvestmentsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentHoldingsScheduleOfInvestmentsTextBlock": {
     "auth_ref": [
      "r161"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for investment holdings. This includes the information required in the supplementary schedule applicable to management investment companies listing holdings of unaffiliated investments.",
        "label": "Investment Holdings, Schedule of Investments [Text Block]",
        "terseLabel": "Investments"
       }
      }
     },
     "localname": "InvestmentHoldingsScheduleOfInvestmentsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Investments"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentIdentifierAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment, Identifier [Axis]",
        "terseLabel": "Investment, Identifier [Axis]"
       }
      }
     },
     "localname": "InvestmentIdentifierAxis",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentIncomeInvestmentExpense": {
     "auth_ref": [
      "r25",
      "r133"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 1.0,
       "parentTag": "us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement",
       "weight": 1.0
      },
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expenses related to the generation of investment income.",
        "label": "Investment Income, Investment Expense",
        "totalLabel": "Total expenses"
       }
      }
     },
     "localname": "InvestmentIncomeInvestmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets": {
       "order": 1.0,
       "parentTag": "us-gaap_ProfitLoss",
       "weight": 1.0
      },
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 1.0,
       "parentTag": "us-gaap_ProfitLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Income, Operating, after Expense and Tax",
        "terseLabel": "Net investment income",
        "totalLabel": "Net investment income"
       }
      }
     },
     "localname": "InvestmentIncomeOperatingAfterExpenseAndTax",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 2.0,
       "parentTag": "us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment Income, Operating, Tax Expense (Benefit)",
        "verboseLabel": "Income tax expense"
       }
      }
     },
     "localname": "InvestmentIncomeOperatingTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentInterestRate": {
     "auth_ref": [
      "r642",
      "r643"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Rate of interest on investment.",
        "label": "Investment Interest Rate",
        "terseLabel": "Interest Rate",
        "verboseLabel": "Interest rate"
       }
      }
     },
     "localname": "InvestmentInterestRate",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_InvestmentInterestRatePaidInKind": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment, Interest Rate, Paid in Kind",
        "terseLabel": "PIK"
       }
      }
     },
     "localname": "InvestmentInterestRatePaidInKind",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_InvestmentIssuerAffiliationAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment, Issuer Affiliation [Axis]",
        "terseLabel": "Investment, Issuer Affiliation [Axis]"
       }
      }
     },
     "localname": "InvestmentIssuerAffiliationAxis",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentIssuerAffiliationDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment, Issuer Affiliation [Domain]",
        "terseLabel": "Investment, Issuer Affiliation [Domain]"
       }
      }
     },
     "localname": "InvestmentIssuerAffiliationDomain",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InvestmentIssuerNameAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment, Issuer Name [Axis]",
        "terseLabel": "Investment, Issuer Name [Axis]"
       }
      }
     },
     "localname": "InvestmentIssuerNameAxis",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentIssuerNameDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment, Issuer Name [Domain]",
        "terseLabel": "Investment, Issuer Name [Domain]"
       }
      }
     },
     "localname": "InvestmentIssuerNameDomain",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InvestmentOwnedAtCost": {
     "auth_ref": [
      "r152"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cost of the investment.",
        "label": "Investment Owned, at Cost",
        "netLabel": "Cost basis",
        "terseLabel": "Cost",
        "verboseLabel": "Investments, cost"
       }
      }
     },
     "localname": "InvestmentOwnedAtCost",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical",
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentOwnedAtFairValue": {
     "auth_ref": [
      "r152",
      "r475",
      "r482"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 1.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      },
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.",
        "label": "Investment Owned, at Fair Value",
        "netLabel": "Fair value",
        "periodEndLabel": "Fair Value, Ending Balance",
        "periodStartLabel": "Fair Value, Beginning Balance",
        "terseLabel": "Investments at fair value",
        "verboseLabel": "Fair Value"
       }
      }
     },
     "localname": "InvestmentOwnedAtFairValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails",
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentOwnedBalancePrincipalAmount": {
     "auth_ref": [
      "r153",
      "r471"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For investments which are quantified by principal amount, the principle balance held at close of period.",
        "label": "Investment Owned, Balance, Principal Amount",
        "netLabel": "Principal amount",
        "terseLabel": "Principal Amount, Par Value",
        "verboseLabel": "Principal amount or par value"
       }
      }
     },
     "localname": "InvestmentOwnedBalancePrincipalAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/CommitmentsandContingenciesDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentOwnedBalanceShares": {
     "auth_ref": [
      "r153",
      "r471"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Balance held at close of period in number of shares.",
        "label": "Investment Owned, Balance, Shares",
        "terseLabel": "Principal Amount, Shares (in shares)",
        "verboseLabel": "Principal amount (in shares)"
       }
      }
     },
     "localname": "InvestmentOwnedBalanceShares",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_InvestmentOwnedPercentOfNetAssets": {
     "auth_ref": [
      "r152",
      "r479"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percent of net assets at close of period. For schedules of investments that are categorized, each category has a percent of net assets for the aggregated value of the Investments in the category.",
        "label": "Investment Owned, Percent of Net Assets",
        "terseLabel": "Percent of Net Assets"
       }
      }
     },
     "localname": "InvestmentOwnedPercentOfNetAssets",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_InvestmentPolicyTextBlock": {
     "auth_ref": [
      "r253",
      "r677"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for investment in financial asset.",
        "label": "Investment, Policy [Policy Text Block]",
        "terseLabel": "Investments"
       }
      }
     },
     "localname": "InvestmentPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentTypeAxis": {
     "auth_ref": [
      "r468",
      "r469",
      "r470",
      "r472",
      "r473",
      "r474",
      "r476",
      "r477",
      "r478",
      "r480",
      "r481",
      "r483",
      "r484",
      "r485",
      "r486"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of investments.",
        "label": "Investment Type [Axis]",
        "terseLabel": "Investment Type [Axis]"
       }
      }
     },
     "localname": "InvestmentTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/CommitmentsandContingenciesDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentTypeCategorizationMember": {
     "auth_ref": [
      "r468",
      "r469",
      "r470",
      "r472",
      "r473",
      "r474",
      "r476",
      "r477",
      "r478",
      "r480",
      "r481",
      "r483",
      "r484",
      "r485",
      "r486"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Asset obtained to generate income or appreciate in value.",
        "label": "Investments [Domain]",
        "terseLabel": "Investments [Domain]"
       }
      }
     },
     "localname": "InvestmentTypeCategorizationMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/CommitmentsandContingenciesDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/InvestmentsIndividualInvestmentsinthePortfoliosofSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsPortfolioSummaryforSLPIIIandSLPIVDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InvestmentUnaffiliatedIssuerMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment, Unaffiliated Issuer [Member]",
        "terseLabel": "Non-controlled/Non-affiliated"
       }
      }
     },
     "localname": "InvestmentUnaffiliatedIssuerMember",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InvestmentsFairValueDisclosure": {
     "auth_ref": [
      "r362"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.",
        "label": "Investments, Fair Value Disclosure",
        "terseLabel": "Total investments"
       }
      }
     },
     "localname": "InvestmentsFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions": {
     "auth_ref": [
      "r159"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Gross additions to the investment in and advance to the affiliate.",
        "label": "Investments in and Advances to Affiliates, at Fair Value, Gross Additions",
        "terseLabel": "Gross Additions"
       }
      }
     },
     "localname": "InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductions": {
     "auth_ref": [
      "r160"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Gross reductions to the investment in and advance to the affiliate.",
        "label": "Investments in and Advances to Affiliates, at Fair Value, Gross Reductions",
        "negatedTerseLabel": "Gross Redemptions"
       }
      }
     },
     "localname": "InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductions",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Investments in and Advances to Affiliates, at Fair Value [Roll Forward]",
        "terseLabel": "Investments in and Advances to Affiliates, at Fair Value [Roll Forward]"
       }
      }
     },
     "localname": "InvestmentsInAndAdvancesToAffiliatesAtFairValueRollForward",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentsInMajorityOwnedSubsidiariesMember": {
     "auth_ref": [
      "r158"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A category that identifies investments in majority owned subsidiaries. This member would be expected to be further segregated into consolidated subsidiaries.",
        "label": "Investments in Majority-owned Subsidiaries [Member]",
        "terseLabel": "Investments in Majority-owned Subsidiaries"
       }
      }
     },
     "localname": "InvestmentsInMajorityOwnedSubsidiariesMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InvestmentsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Assets held for their financial return, rather than for the entity's operations.",
        "label": "Investments [Member]",
        "terseLabel": "Total"
       }
      }
     },
     "localname": "InvestmentsMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_Liabilities": {
     "auth_ref": [
      "r12",
      "r188",
      "r254",
      "r274",
      "r275",
      "r276",
      "r277",
      "r278",
      "r279",
      "r280",
      "r281",
      "r282",
      "r349",
      "r352",
      "r353",
      "r373",
      "r511",
      "r653",
      "r669",
      "r670"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 1.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      },
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.",
        "label": "Liabilities",
        "totalLabel": "Total liabilities"
       }
      }
     },
     "localname": "Liabilities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Liabilities [Abstract]",
        "terseLabel": "Liabilities"
       }
      }
     },
     "localname": "LiabilitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquity": {
     "auth_ref": [
      "r10",
      "r109",
      "r127",
      "r529",
      "r634",
      "r647",
      "r662"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.",
        "label": "Liabilities and Equity",
        "totalLabel": "Total liabilities and net assets"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest": {
     "auth_ref": [
      "r49"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).",
        "label": "Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest",
        "terseLabel": "Ownership percentage"
       }
      }
     },
     "localname": "LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_LineOfCredit": {
     "auth_ref": [
      "r3",
      "r107",
      "r120"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 1.0,
       "parentTag": "us-gaap_LongTermDebt",
       "weight": 1.0
      },
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.",
        "label": "Long-Term Line of Credit",
        "terseLabel": "Credit facility",
        "verboseLabel": "Credit facility outstanding balance"
       }
      }
     },
     "localname": "LineOfCredit",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditFacilityCommitmentFeeAmount": {
     "auth_ref": [
      "r11"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the fee for available but unused credit capacity under the credit facility.",
        "label": "Line of Credit Facility, Commitment Fee Amount",
        "terseLabel": "Non-usage fee"
       }
      }
     },
     "localname": "LineOfCreditFacilityCommitmentFeeAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity": {
     "auth_ref": [
      "r11"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.",
        "label": "Line of Credit Facility, Current Borrowing Capacity",
        "terseLabel": "Available borrowing capacity"
       }
      }
     },
     "localname": "LineOfCreditFacilityCurrentBorrowingCapacity",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditFacilityLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Line of Credit Facility [Line Items]",
        "terseLabel": "Line of Credit Facility [Line Items]"
       }
      }
     },
     "localname": "LineOfCreditFacilityLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity": {
     "auth_ref": [
      "r11"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.",
        "label": "Line of Credit Facility, Maximum Borrowing Capacity",
        "terseLabel": "Maximum borrowing capacity"
       }
      }
     },
     "localname": "LineOfCreditFacilityMaximumBorrowingCapacity",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity": {
     "auth_ref": [
      "r11"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).",
        "label": "Line of Credit Facility, Remaining Borrowing Capacity",
        "terseLabel": "Maximum amount of borrowings available"
       }
      }
     },
     "localname": "LineOfCreditFacilityRemainingBorrowingCapacity",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditFacilityTable": {
     "auth_ref": [
      "r11",
      "r633"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A table or schedule providing information pertaining to short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line.",
        "label": "Line of Credit Facility [Table]",
        "terseLabel": "Line of Credit Facility [Table]"
       }
      }
     },
     "localname": "LineOfCreditFacilityTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.",
        "label": "Line of Credit Facility, Unused Capacity, Commitment Fee Percentage",
        "terseLabel": "Commitment fee percentage on unused capacity"
       }
      }
     },
     "localname": "LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_LineOfCreditMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time, and under which borrowings outstanding may be either short-term or long-term, depending upon the particulars.",
        "label": "Line of Credit [Member]",
        "terseLabel": "Credit Facility"
       }
      }
     },
     "localname": "LineOfCreditMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LitigationSettlementAmountAwardedToOtherParty": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount awarded to other party in judgment or settlement of litigation.",
        "label": "Litigation Settlement, Amount Awarded to Other Party",
        "terseLabel": "Settlement amount awarded to other party"
       }
      }
     },
     "localname": "LitigationSettlementAmountAwardedToOtherParty",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LondonInterbankOfferedRateLIBORMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Interest rate at which a bank borrows funds from other banks in the London interbank market.",
        "label": "London Interbank Offered Rate (LIBOR) [Member]",
        "terseLabel": "LIBOR"
       }
      }
     },
     "localname": "LondonInterbankOfferedRateLIBORMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LongTermDebt": {
     "auth_ref": [
      "r3",
      "r107",
      "r124",
      "r290",
      "r301",
      "r517",
      "r518"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 1.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.",
        "label": "Long-Term Debt",
        "totalLabel": "Net borrowings"
       }
      }
     },
     "localname": "LongTermDebt",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Long-Term Debt, Unclassified [Abstract]",
        "terseLabel": "Borrowings"
       }
      }
     },
     "localname": "LongTermDebtAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LongTermDebtAverageAmountOutstanding": {
     "auth_ref": [
      "r502",
      "r503"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Average amount outstanding of long-term debt.",
        "label": "Long-Term Debt, Average Amount Outstanding",
        "terseLabel": "Average debt outstanding"
       }
      }
     },
     "localname": "LongTermDebtAverageAmountOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebentureOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtFairValue": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.",
        "label": "Long-Term Debt, Fair Value",
        "terseLabel": "Borrowings"
       }
      }
     },
     "localname": "LongTermDebtFairValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtTextBlock": {
     "auth_ref": [
      "r63"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for long-term debt.",
        "label": "Long-Term Debt [Text Block]",
        "terseLabel": "Borrowings"
       }
      }
     },
     "localname": "LongTermDebtTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Borrowings"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LongTermDebtWeightedAverageInterestRateOverTime": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average interest rate of long-term debt outstanding calculated over time.",
        "label": "Long-Term Debt, Weighted Average Interest Rate, over Time",
        "terseLabel": "Weighted average interest rate"
       }
      }
     },
     "localname": "LongTermDebtWeightedAverageInterestRateOverTime",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebentureOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_LongtermDebtTypeAxis": {
     "auth_ref": [
      "r15"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of long-term debt.",
        "label": "Long-Term Debt, Type [Axis]",
        "terseLabel": "Long-Term Debt, Type [Axis]"
       }
      }
     },
     "localname": "LongtermDebtTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebentureOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails",
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LongtermDebtTypeDomain": {
     "auth_ref": [
      "r15",
      "r60"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Type of long-term debt arrangement, such as notes, line of credit, commercial paper, asset-based financing, project financing, letter of credit financing. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the company, if longer.",
        "label": "Long-Term Debt, Type [Domain]",
        "terseLabel": "Long-Term Debt, Type [Domain]"
       }
      }
     },
     "localname": "LongtermDebtTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsConvertibleNotesOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebentureOtherInformationDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSummaryofSBAguaranteedDebenturesDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails",
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LossContingencyDamagesSoughtValue": {
     "auth_ref": [
      "r649",
      "r650",
      "r651"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The value (monetary amount) of the award the plaintiff seeks in the legal matter.",
        "label": "Loss Contingency, Damages Sought, Value",
        "terseLabel": "Damages sought"
       }
      }
     },
     "localname": "LossContingencyDamagesSoughtValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ManagementAndServiceFeesBaseRate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Management and Service Fees, Base Rate",
        "terseLabel": "Base management fee percentage"
       }
      }
     },
     "localname": "ManagementAndServiceFeesBaseRate",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ManagementAndServiceFeesIncentiveRate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Management and Service Fees, Incentive Rate",
        "terseLabel": "Incentive fee percentage"
       }
      }
     },
     "localname": "ManagementAndServiceFeesIncentiveRate",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ManagementFeeExpense": {
     "auth_ref": [
      "r101"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/AgreementsManagementFeesandIncentiveFeesDetails": {
       "order": 1.0,
       "parentTag": "nmfc_InvestmentCompanyManagementFeeExpenseAfterReductionOfFeeWaiver",
       "weight": 1.0
      },
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 2.0,
       "parentTag": "us-gaap_InvestmentIncomeInvestmentExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expenses related to the managing member or general partner for management of the day-to-day business functions of the limited liability company (LLC) or limited partnership (LP).",
        "label": "Management Fee Expense",
        "terseLabel": "Management fee"
       }
      }
     },
     "localname": "ManagementFeeExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsManagementFeesandIncentiveFeesDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ManagementFeePayable": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 2.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying amount of the unpaid portion of the fee payable to the managing member or general partner for management of the fund or trust.",
        "label": "Management Fee Payable",
        "terseLabel": "Management fee payable"
       }
      }
     },
     "localname": "ManagementFeePayable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MeasurementInputDiscountRateMember": {
     "auth_ref": [
      "r661"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement input using interest rate to determine present value of future cash flows.",
        "label": "Measurement Input, Discount Rate [Member]",
        "terseLabel": "Discount rate"
       }
      }
     },
     "localname": "MeasurementInputDiscountRateMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputEbitdaMultipleMember": {
     "auth_ref": [
      "r661"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement input using earnings before interest, tax, depreciation and amortization (EBITDA) multiple.",
        "label": "Measurement Input, EBITDA Multiple [Member]",
        "terseLabel": "EBITDA multiple"
       }
      }
     },
     "localname": "MeasurementInputEbitdaMultipleMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputRevenueMultipleMember": {
     "auth_ref": [
      "r661"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement input using market valuation of entity divided by revenue.",
        "label": "Measurement Input, Revenue Multiple [Member]",
        "terseLabel": "Revenue multiple"
       }
      }
     },
     "localname": "MeasurementInputRevenueMultipleMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputTypeAxis": {
     "auth_ref": [
      "r364"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of measurement input used to determine value of asset and liability.",
        "label": "Measurement Input Type [Axis]",
        "terseLabel": "Measurement Input Type [Axis]"
       }
      }
     },
     "localname": "MeasurementInputTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_MeasurementInputTypeDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement input used to determine value of asset and liability.",
        "label": "Measurement Input Type [Domain]",
        "terseLabel": "Measurement Input Type [Domain]"
       }
      }
     },
     "localname": "MeasurementInputTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MembersEquity": {
     "auth_ref": [
      "r71",
      "r230",
      "r231",
      "r232",
      "r233"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of ownership interest in limited liability company (LLC), attributable to the parent entity.",
        "label": "Members' Equity",
        "terseLabel": "Members' capital"
       }
      }
     },
     "localname": "MembersEquity",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MinorityInterest": {
     "auth_ref": [
      "r18",
      "r108",
      "r126",
      "r188",
      "r254",
      "r274",
      "r276",
      "r277",
      "r278",
      "r281",
      "r282",
      "r373"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 2.0,
       "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).",
        "label": "Stockholders' Equity Attributable to Noncontrolling Interest",
        "terseLabel": "Non-controlling interest in New Mountain Net Lease Corporation"
       }
      }
     },
     "localname": "MinorityInterest",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetAssetValuePerShare": {
     "auth_ref": [
      "r80",
      "r81",
      "r89",
      "r145",
      "r150"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Net asset value per share or per unit of investments in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes fair value disclosure.",
        "label": "Net Asset Value Per Share",
        "periodEndLabel": "Net asset value, ending balance (in dollars per share)",
        "periodStartLabel": "Net asset value, beginning balance (in dollars per share)",
        "terseLabel": "Net asset value per share of New Mountain Finance Corporation (in dollars per share)"
       }
      }
     },
     "localname": "NetAssetValuePerShare",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivities": {
     "auth_ref": [
      "r185"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 1.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.",
        "label": "Net Cash Provided by (Used in) Financing Activities",
        "totalLabel": "Net cash flows (used in) provided by financing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Net Cash Provided by (Used in) Financing Activities [Abstract]",
        "terseLabel": "Cash flows from financing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivities": {
     "auth_ref": [
      "r32",
      "r35",
      "r38"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 2.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.",
        "label": "Net Cash Provided by (Used in) Operating Activities",
        "totalLabel": "Net cash flows used in operating activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Net Cash Provided by (Used in) Operating Activities [Abstract]",
        "terseLabel": "Cash flows from operating activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetIncomeLoss": {
     "auth_ref": [
      "r19",
      "r38",
      "r115",
      "r132",
      "r166",
      "r175",
      "r176",
      "r180",
      "r188",
      "r199",
      "r203",
      "r204",
      "r205",
      "r206",
      "r209",
      "r210",
      "r220",
      "r240",
      "r241",
      "r243",
      "r245",
      "r254",
      "r274",
      "r275",
      "r276",
      "r277",
      "r278",
      "r279",
      "r280",
      "r281",
      "r282",
      "r358",
      "r373",
      "r512",
      "r653"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_NetIncomeLossAttributableToParentDiluted",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.",
        "label": "Net Income (Loss) Attributable to Parent",
        "terseLabel": "Numerator for basic earnings per share",
        "totalLabel": "Net increase (decrease) in net assets resulting from operations/ members capital",
        "verboseLabel": "Numerator for increase in net assets per share"
       }
      }
     },
     "localname": "NetIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetIncomeLossAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r76",
      "r78",
      "r175",
      "r176",
      "r209",
      "r210",
      "r630"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 2.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of Net Income (Loss) attributable to noncontrolling interest.",
        "label": "Net Income (Loss) Attributable to Noncontrolling Interest",
        "negatedTerseLabel": "Less: Net increase in net assets resulting from operations related to non-controlling interest in New Mountain Net Lease Corporation"
       }
      }
     },
     "localname": "NetIncomeLossAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetIncomeLossAttributableToParentDiluted": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The portion of profit or loss for the period, net of income taxes, which is attributable to the parent, and includes adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.",
        "label": "Net Income (Loss) Attributable to Parent, Diluted",
        "totalLabel": "Numerator for diluted earnings per share:"
       }
      }
     },
     "localname": "NetIncomeLossAttributableToParentDiluted",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetInvestmentIncome": {
     "auth_ref": [
      "r454"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 1.0,
       "parentTag": "us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.",
        "label": "Net Investment Income",
        "terseLabel": "Net investment income before income taxes",
        "totalLabel": "Net investment income before income taxes"
       }
      }
     },
     "localname": "NetInvestmentIncome",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock": {
     "auth_ref": [
      "r165",
      "r197",
      "r198",
      "r201",
      "r202",
      "r211",
      "r212",
      "r213",
      "r249",
      "r250",
      "r256",
      "r257",
      "r340",
      "r341",
      "r342",
      "r355",
      "r359",
      "r360",
      "r361",
      "r374",
      "r375",
      "r376",
      "r388",
      "r389",
      "r390",
      "r392",
      "r437",
      "r438",
      "r439",
      "r461",
      "r462",
      "r463",
      "r464",
      "r465"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.",
        "label": "Accounting Standards Update and Change in Accounting Principle [Text Block]",
        "terseLabel": "Recent Accounting Standards Updates"
       }
      }
     },
     "localname": "NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/RecentAccountingStandardsUpdates"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy pertaining to new accounting pronouncements that may impact the entity's financial reporting. Includes, but is not limited to, quantification of the expected or actual impact.",
        "label": "New Accounting Pronouncements, Policy [Policy Text Block]",
        "terseLabel": "Recent accounting standards updates"
       }
      }
     },
     "localname": "NewAccountingPronouncementsPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_NoncontrollingInterestMember": {
     "auth_ref": [
      "r74",
      "r311",
      "r637",
      "r638",
      "r639"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This element represents that portion of equity (net assets) in a subsidiary not attributable, directly or indirectly, to the parent. A noncontrolling interest is sometimes called a minority interest.",
        "label": "Noncontrolling Interest [Member]",
        "terseLabel": "Non-Controlling Interest in NMNLC"
       }
      }
     },
     "localname": "NoncontrollingInterestMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets",
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OperatingExpensesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Operating Expenses [Abstract]",
        "terseLabel": "Expenses"
       }
      }
     },
     "localname": "OperatingExpensesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Organization, Consolidation and Presentation of Financial Statements [Abstract]"
       }
      }
     },
     "localname": "OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock": {
     "auth_ref": [
      "r0",
      "r79"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.",
        "label": "Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]",
        "terseLabel": "Formation and Business Purpose"
       }
      }
     },
     "localname": "OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FormationandBusinessPurpose"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_OtherAggregatedInvestmentsMember": {
     "auth_ref": [
      "r469",
      "r473",
      "r477"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Other investments in debt and equity securities and other forms of securities that provide ownership interests.",
        "label": "Other Security Investments [Member]",
        "terseLabel": "Equity and other"
       }
      }
     },
     "localname": "OtherAggregatedInvestmentsMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/FairValueFairValueLevelsDetails",
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails",
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherAssets": {
     "auth_ref": [
      "r104",
      "r122",
      "r168"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 6.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of assets classified as other.",
        "label": "Other Assets",
        "terseLabel": "Other assets"
       }
      }
     },
     "localname": "OtherAssets",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherCommitment": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.",
        "label": "Other Commitment",
        "terseLabel": "Other commitments"
       }
      }
     },
     "localname": "OtherCommitment",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/CommitmentsandContingenciesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherCommitmentsAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of other commitment.",
        "label": "Other Commitments [Axis]",
        "terseLabel": "Other Commitments [Axis]"
       }
      }
     },
     "localname": "OtherCommitmentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/CommitmentsandContingenciesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherCommitmentsDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Other future obligation.",
        "label": "Other Commitments [Domain]",
        "terseLabel": "Other Commitments [Domain]"
       }
      }
     },
     "localname": "OtherCommitmentsDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/CommitmentsandContingenciesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherCommitmentsLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Other Commitments [Line Items]",
        "terseLabel": "Other Commitments [Line Items]"
       }
      }
     },
     "localname": "OtherCommitmentsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/CommitmentsandContingenciesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherCommitmentsTable": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about obligations resulting from other commitments.",
        "label": "Other Commitments [Table]",
        "terseLabel": "Other Commitments [Table]"
       }
      }
     },
     "localname": "OtherCommitmentsTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/CommitmentsandContingenciesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherExpenses": {
     "auth_ref": [
      "r23",
      "r135"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_InvestmentIncomeInvestmentExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expense classified as other.",
        "label": "Other Expenses",
        "terseLabel": "Other expenses"
       }
      }
     },
     "localname": "OtherExpenses",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherGeneralAndAdministrativeExpense": {
     "auth_ref": [
      "r22"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 6.0,
       "parentTag": "us-gaap_InvestmentIncomeInvestmentExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of general and administrative expense classified as other.",
        "label": "Other General and Administrative Expense",
        "terseLabel": "Other general and administrative expenses"
       }
      }
     },
     "localname": "OtherGeneralAndAdministrativeExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherIncome": {
     "auth_ref": [
      "r134"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 5.0,
       "parentTag": "us-gaap_GrossInvestmentIncomeOperating",
       "weight": 1.0
      },
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_GrossInvestmentIncomeOperating",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of revenue and income classified as other.",
        "label": "Other Income",
        "negatedTerseLabel": "Reversal of previously recorded other income",
        "terseLabel": "Other income",
        "verboseLabel": "Other Income"
       }
      }
     },
     "localname": "OtherIncome",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedStatementofOperationsInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherLiabilities": {
     "auth_ref": [
      "r113"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 7.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      },
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails": {
       "order": 5.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of liabilities classified as other.",
        "label": "Other Liabilities",
        "terseLabel": "Other liabilities"
       }
      }
     },
     "localname": "OtherLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherNoncashIncomeExpense": {
     "auth_ref": [
      "r38"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 10.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of income (expense) included in net income that results in no cash inflow (outflow), classified as other.",
        "label": "Other Noncash Income (Expense)",
        "negatedTerseLabel": "Non-cash investment income"
       }
      }
     },
     "localname": "OtherNoncashIncomeExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ParentMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Portion of equity, or net assets, in the consolidated entity attributable, directly or indirectly, to the parent. Excludes noncontrolling interests.",
        "label": "Parent [Member]",
        "terseLabel": "Total Net Assets of NMFC",
        "verboseLabel": "New Mountain Finance Corporation"
       }
      }
     },
     "localname": "ParentMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets",
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PayableInvestmentPurchase": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Payable, Investment, Purchase",
        "terseLabel": "Payable for unsettled securities purchased"
       }
      }
     },
     "localname": "PayableInvestmentPurchase",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 11.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Payments for Purchase of Investment, Operating Activity",
        "negatedTerseLabel": "Cash paid for purchase of investments"
       }
      }
     },
     "localname": "PaymentsForPurchaseOfInvestmentOperatingActivity",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsOfDebtIssuanceCosts": {
     "auth_ref": [
      "r30"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 9.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.",
        "label": "Payments of Debt Issuance Costs",
        "negatedTerseLabel": "Deferred financing costs paid"
       }
      }
     },
     "localname": "PaymentsOfDebtIssuanceCosts",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsOfDividendsCommonStock": {
     "auth_ref": [
      "r28"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.",
        "label": "Payments of Ordinary Dividends, Common Stock",
        "negatedTerseLabel": "Distributions paid"
       }
      }
     },
     "localname": "PaymentsOfDividendsCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsOfStockIssuanceCosts": {
     "auth_ref": [
      "r31"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow for cost incurred directly with the issuance of an equity security.",
        "label": "Payments of Stock Issuance Costs",
        "negatedTerseLabel": "Offering costs paid",
        "terseLabel": "Offering expenses"
       }
      }
     },
     "localname": "PaymentsOfStockIssuanceCosts",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/NetAssetsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToMinorityShareholders": {
     "auth_ref": [
      "r31"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 8.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow to a noncontrolling interest. Includes, but not limited to, reduction of noncontrolling interest ownership. Excludes dividends paid to the noncontrolling interest.",
        "label": "Payments to Noncontrolling Interests",
        "negatedTerseLabel": "Distributions related to non-controlling interest in NMNLC"
       }
      }
     },
     "localname": "PaymentsToMinorityShareholders",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PortionAtFairValueFairValueDisclosureMember": {
     "auth_ref": [
      "r371"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measured at fair value for financial reporting purposes.",
        "label": "Portion at Fair Value Measurement [Member]",
        "terseLabel": "Portion at Fair Value Measurement [Member]"
       }
      }
     },
     "localname": "PortionAtFairValueFairValueDisclosureMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PreferredStockDividendRatePercentage": {
     "auth_ref": [
      "r305"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The percentage rate used to calculate dividend payments on preferred stock.",
        "label": "Preferred Stock, Dividend Rate, Percentage",
        "terseLabel": "Preferred equity dividend rate"
       }
      }
     },
     "localname": "PreferredStockDividendRatePercentage",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_PreferredStockParOrStatedValuePerShare": {
     "auth_ref": [
      "r4",
      "r304"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.",
        "label": "Preferred Stock, Par or Stated Value Per Share",
        "terseLabel": "Preferred stock, par value (in dollars per share)"
       }
      }
     },
     "localname": "PreferredStockParOrStatedValuePerShare",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_PreferredStockSharesAuthorized": {
     "auth_ref": [
      "r4"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.",
        "label": "Preferred Stock, Shares Authorized",
        "terseLabel": "Preferred stock, shares authorized (in shares)"
       }
      }
     },
     "localname": "PreferredStockSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_PreferredStockSharesIssued": {
     "auth_ref": [
      "r4",
      "r304"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.",
        "label": "Preferred Stock, Shares Issued",
        "terseLabel": "Preferred stock, shares issued (in shares)"
       }
      }
     },
     "localname": "PreferredStockSharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_PreferredStockSharesOutstanding": {
     "auth_ref": [
      "r4"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.",
        "label": "Preferred Stock, Shares Outstanding",
        "terseLabel": "Preferred stock, shares outstanding (in shares)"
       }
      }
     },
     "localname": "PreferredStockSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_PreferredStockValue": {
     "auth_ref": [
      "r4",
      "r529"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 1.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.",
        "label": "Preferred Stock, Value, Issued",
        "terseLabel": "Preferred stock, par value $0.01 per share, 2,000,000 shares authorized, none issued"
       }
      }
     },
     "localname": "PreferredStockValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PrimeRateMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Interest rate charged by financial institutions to their most creditworthy borrowers.",
        "label": "Prime Rate [Member]",
        "terseLabel": "Prime Rate"
       }
      }
     },
     "localname": "PrimeRateMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ProceedsFromConvertibleDebt": {
     "auth_ref": [
      "r27"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.",
        "label": "Proceeds from Convertible Debt",
        "terseLabel": "Proceeds from Convertible Debt"
       }
      }
     },
     "localname": "ProceedsFromConvertibleDebt",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 12.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Proceeds from Disposition of Investment, Operating Activity",
        "terseLabel": "Proceeds from paydowns of investments"
       }
      }
     },
     "localname": "ProceedsFromDispositionOfInvestmentOperatingActivity",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromIssuanceOfCommonStock": {
     "auth_ref": [
      "r26"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash inflow from the additional capital contribution to the entity.",
        "label": "Proceeds from Issuance of Common Stock",
        "terseLabel": "Net proceeds from offerings of common stock",
        "verboseLabel": "Net proceeds from shares sold"
       }
      }
     },
     "localname": "ProceedsFromIssuanceOfCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/FormationandBusinessPurposeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromLegalSettlements": {
     "auth_ref": [
      "r33"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cash received for the settlement of litigation during the current period.",
        "label": "Proceeds from Legal Settlements",
        "terseLabel": "Payment received for settlement"
       }
      }
     },
     "localname": "ProceedsFromLegalSettlements",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromLongTermLinesOfCredit": {
     "auth_ref": [
      "r27"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.",
        "label": "Proceeds from Long-Term Lines of Credit",
        "terseLabel": "Proceeds from Credit Facility"
       }
      }
     },
     "localname": "ProceedsFromLongTermLinesOfCredit",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProfessionalFees": {
     "auth_ref": [
      "r155",
      "r156"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 4.0,
       "parentTag": "us-gaap_InvestmentIncomeInvestmentExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.",
        "label": "Professional Fees",
        "terseLabel": "Professional fees"
       }
      }
     },
     "localname": "ProfessionalFees",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProfitLoss": {
     "auth_ref": [
      "r166",
      "r175",
      "r176",
      "r184",
      "r188",
      "r199",
      "r209",
      "r210",
      "r240",
      "r241",
      "r243",
      "r245",
      "r254",
      "r274",
      "r275",
      "r276",
      "r277",
      "r278",
      "r279",
      "r280",
      "r281",
      "r282",
      "r347",
      "r350",
      "r351",
      "r358",
      "r373",
      "r453",
      "r512",
      "r527",
      "r528",
      "r630",
      "r653"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      },
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets": {
       "order": 1.0,
       "parentTag": "us-gaap_StockholdersEquityPeriodIncreaseDecrease",
       "weight": 1.0
      },
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 1.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.",
        "label": "Net Income (Loss), Including Portion Attributable to Noncontrolling Interest",
        "terseLabel": "Net increase in net assets resulting from operations",
        "totalLabel": "Net increase in net assets resulting from operations",
        "verboseLabel": "Net increase (decrease)\u00a0in net\u00a0assets resulting\u00a0from operations"
       }
      }
     },
     "localname": "ProfitLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentFairValueDisclosure": {
     "auth_ref": [
      "r660"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value portion of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.",
        "label": "Property, Plant, and Equipment, Fair Value Disclosure",
        "terseLabel": "Fair Value"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesSummaryofPropertiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Property, Plant and Equipment [Line Items]",
        "terseLabel": "Property, Plant and Equipment [Line Items]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesSummaryofPropertiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentTextBlock": {
     "auth_ref": [
      "r57"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.",
        "label": "Property, Plant and Equipment [Table Text Block]",
        "terseLabel": "Schedule of Properties"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RealEstateSectorMember": {
     "auth_ref": [
      "r514"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sector of the economy consisting of companies engaged in real estate business activities.",
        "label": "Real Estate Sector [Member]",
        "terseLabel": "Net Lease"
       }
      }
     },
     "localname": "RealEstateSectorMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RealizedAndUnrealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets": {
       "order": 5.0,
       "parentTag": "us-gaap_ProfitLoss",
       "weight": -1.0
      },
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 6.0,
       "parentTag": "us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionOperatingAfterTax",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Realized and Unrealized Gain (Loss), Investment and Derivative, Operating, Tax Expense (Benefit)",
        "negatedLabel": "Provision for taxes",
        "negatedTerseLabel": "Provision for taxes"
       }
      }
     },
     "localname": "RealizedAndUnrealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionOperatingAfterTax": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations": {
       "order": 2.0,
       "parentTag": "us-gaap_ProfitLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Realized and Unrealized Gain (Loss), Investment, Derivative, and Foreign Currency Transaction, Operating, after Tax",
        "totalLabel": "Net realized and unrealized gains"
       }
      }
     },
     "localname": "RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionOperatingAfterTax",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets": {
       "order": 2.0,
       "parentTag": "us-gaap_ProfitLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Realized Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, before Tax",
        "terseLabel": "Net realized gains on investments and foreign currency",
        "verboseLabel": "Net Realized Gains (Losses)"
       }
      }
     },
     "localname": "RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReceivableInvestmentSale": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Receivable, Investment, Sale",
        "terseLabel": "Receivable from unsettled securities sold"
       }
      }
     },
     "localname": "ReceivableInvestmentSale",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsSelectedBalanceSheetInformationforSLPIIIandSLPIVDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RelatedPartyDomain": {
     "auth_ref": [
      "r319",
      "r395",
      "r396"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Related parties include affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests.",
        "label": "Related Party [Domain]",
        "terseLabel": "Related Party [Domain]"
       }
      }
     },
     "localname": "RelatedPartyDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RelatedPartyTransactionAxis": {
     "auth_ref": [
      "r162",
      "r395",
      "r396",
      "r668"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of related party transaction.",
        "label": "Related Party Transaction [Axis]",
        "terseLabel": "Related Party Transaction [Axis]"
       }
      }
     },
     "localname": "RelatedPartyTransactionAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsManagementFeesandIncentiveFeesDetails",
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RelatedPartyTransactionDomain": {
     "auth_ref": [
      "r162"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Transaction between related party.",
        "label": "Related Party Transaction [Domain]",
        "terseLabel": "Related Party Transaction [Domain]"
       }
      }
     },
     "localname": "RelatedPartyTransactionDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsManagementFeesandIncentiveFeesDetails",
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RelatedPartyTransactionLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Related Party Transaction [Line Items]",
        "terseLabel": "Related Party Transaction [Line Items]"
       }
      }
     },
     "localname": "RelatedPartyTransactionLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsManagementFeesandIncentiveFeesDetails",
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RelatedPartyTransactionRate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties.",
        "label": "Related Party Transaction, Rate",
        "terseLabel": "Interest rate"
       }
      }
     },
     "localname": "RelatedPartyTransactionRate",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_RelatedPartyTransactionsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Related Party Transactions [Abstract]"
       }
      }
     },
     "localname": "RelatedPartyTransactionsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_RelatedPartyTransactionsByRelatedPartyAxis": {
     "auth_ref": [
      "r319",
      "r395",
      "r440",
      "r441",
      "r442",
      "r443",
      "r444",
      "r445",
      "r446",
      "r447",
      "r448",
      "r449",
      "r450",
      "r451",
      "r668"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of related party. Related parties include, but not limited to, affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests.",
        "label": "Related Party [Axis]",
        "terseLabel": "Related Party [Axis]"
       }
      }
     },
     "localname": "RelatedPartyTransactionsByRelatedPartyAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RelatedPartyTransactionsDisclosureTextBlock": {
     "auth_ref": [
      "r393",
      "r394",
      "r396",
      "r398",
      "r399"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.",
        "label": "Related Party Transactions Disclosure [Text Block]",
        "terseLabel": "Related Parties",
        "verboseLabel": "Agreements"
       }
      }
     },
     "localname": "RelatedPartyTransactionsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/Agreements",
      "http://www.newmountainfinance.com/role/RelatedParties"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RepaymentsOfLongTermLinesOfCredit": {
     "auth_ref": [
      "r29"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.",
        "label": "Repayments of Long-Term Lines of Credit",
        "negatedTerseLabel": "Repayments of Credit Facility"
       }
      }
     },
     "localname": "RepaymentsOfLongTermLinesOfCredit",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RepaymentsOfUnsecuredDebt": {
     "auth_ref": [
      "r29"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows": {
       "order": 7.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.",
        "label": "Repayments of Unsecured Debt",
        "negatedTerseLabel": "Repayment of Unsecured Notes",
        "terseLabel": "Repayment of Unsecured Notes"
       }
      }
     },
     "localname": "RepaymentsOfUnsecuredDebt",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RepurchaseAgreementsCollateralPolicy": {
     "auth_ref": [
      "r418"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy with regard to collateral required and collateral rights on securities sold under agreements to repurchase.",
        "label": "Repurchase Agreements, Collateral, Policy [Policy Text Block]",
        "terseLabel": "Collateralized agreements or repurchase financings"
       }
      }
     },
     "localname": "RepurchaseAgreementsCollateralPolicy",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RetainedEarningsAccumulatedDeficit": {
     "auth_ref": [
      "r7",
      "r71",
      "r125",
      "r461",
      "r465",
      "r529"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 4.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.",
        "label": "Retained Earnings (Accumulated Deficit)",
        "terseLabel": "Accumulated undistributed earnings"
       }
      }
     },
     "localname": "RetainedEarningsAccumulatedDeficit",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RevenueRecognitionPolicyTextBlock": {
     "auth_ref": [
      "r508",
      "r509"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for revenue. Includes revenue from contract with customer and from other sources.",
        "label": "Revenue [Policy Text Block]",
        "terseLabel": "Revenue recognition"
       }
      }
     },
     "localname": "RevenueRecognitionPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RevenuesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Revenues [Abstract]",
        "terseLabel": "Investment\u00a0income"
       }
      }
     },
     "localname": "RevenuesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RevolvingCreditFacilityMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Arrangement in which loan proceeds can continuously be obtained following repayments, but the total amount borrowed cannot exceed a specified maximum amount.",
        "label": "Revolving Credit Facility [Member]",
        "terseLabel": "Revolving Credit Facility"
       }
      }
     },
     "localname": "RevolvingCreditFacilityMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredManagementCompanyRevolverDetails",
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SaleOfStockConsiderationReceivedOnTransaction": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cash received on stock transaction after deduction of issuance costs.",
        "label": "Sale of Stock, Consideration Received on Transaction",
        "terseLabel": "Sale of stock, consideration received"
       }
      }
     },
     "localname": "SaleOfStockConsiderationReceivedOnTransaction",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsNarrativeDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SaleOfStockNameOfTransactionDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sale of the entity's stock, including, but not limited to, initial public offering (IPO) and private placement.",
        "label": "Sale of Stock [Domain]",
        "terseLabel": "Sale of Stock [Domain]"
       }
      }
     },
     "localname": "SaleOfStockNameOfTransactionDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.",
        "label": "Sale of Stock, Number of Shares Issued in Transaction",
        "terseLabel": "Sale of stock, number of shares issued (in shares)"
       }
      }
     },
     "localname": "SaleOfStockNumberOfSharesIssuedInTransaction",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsNarrativeDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_SaleOfStockPricePerShare": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.",
        "label": "Sale of Stock, Price Per Share",
        "terseLabel": "Sale of stock, price per share (in dollars per share)"
       }
      }
     },
     "localname": "SaleOfStockPricePerShare",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ScheduleOfDebtInstrumentsTextBlock": {
     "auth_ref": [
      "r15",
      "r66",
      "r68",
      "r69",
      "r70",
      "r96",
      "r97",
      "r99",
      "r119",
      "r517",
      "r519",
      "r636"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.",
        "label": "Schedule of Long-Term Debt Instruments [Table Text Block]",
        "terseLabel": "Schedule of Information Related to Borrowings"
       }
      }
     },
     "localname": "ScheduleOfDebtInstrumentsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock": {
     "auth_ref": [
      "r641"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.",
        "label": "Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]",
        "terseLabel": "Schedule of Basic and Diluted Earnings Per Share"
       }
      }
     },
     "localname": "ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/EarningsPerShareTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfInvestmentsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Schedule of Investments [Abstract]"
       }
      }
     },
     "localname": "ScheduleOfInvestmentsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfInvestmentsLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Schedule of Investments [Line Items]",
        "terseLabel": "Schedule of Investments [Line Items]"
       }
      }
     },
     "localname": "ScheduleOfInvestmentsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfInvestmentsTable": {
     "auth_ref": [
      "r157"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A container table for all schedule of investment items. It ties in the \"Legal Entity [Axis]\" to all of its contained line items.",
        "label": "Schedule of Investments [Table]",
        "terseLabel": "Schedule of Investments [Table]"
       }
      }
     },
     "localname": "ScheduleOfInvestmentsTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfPropertyPlantAndEquipmentTable": {
     "auth_ref": [
      "r57"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.",
        "label": "Property, Plant and Equipment [Table]",
        "terseLabel": "Property, Plant and Equipment [Table]"
       }
      }
     },
     "localname": "ScheduleOfPropertyPlantAndEquipmentTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesSummaryofPropertiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable": {
     "auth_ref": [
      "r101",
      "r102"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule of quantitative and qualitative information pertaining to related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.",
        "label": "Schedule of Related Party Transactions, by Related Party [Table]",
        "terseLabel": "Schedule of Related Party Transactions, by Related Party [Table]"
       }
      }
     },
     "localname": "ScheduleOfRelatedPartyTransactionsByRelatedPartyTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsManagementFeesandIncentiveFeesDetails",
      "http://www.newmountainfinance.com/role/AgreementsNarrativeDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates.",
        "label": "Schedule of Related Party Transactions [Table Text Block]",
        "terseLabel": "Schedule of Management Fees and Incentive Fees"
       }
      }
     },
     "localname": "ScheduleOfRelatedPartyTransactionsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/AgreementsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SecuritiesFinancingTransactionLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Securities Financing Transaction [Line Items]",
        "terseLabel": "Securities Financing Transaction [Line Items]"
       }
      }
     },
     "localname": "SecuritiesFinancingTransactionLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SecuritiesFinancingTransactionTable": {
     "auth_ref": [
      "r103"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule, as of the balance sheet date, of security financing transactions by type, the aggregate value of securities financing transactions by type and aggregate acquisition price by type of security financing transaction.",
        "label": "Securities Financing Transaction [Table]",
        "terseLabel": "Securities Financing Transaction [Table]"
       }
      }
     },
     "localname": "SecuritiesFinancingTransactionTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SecuritiesPurchasedUnderAgreementsToResell": {
     "auth_ref": [
      "r110",
      "r173",
      "r174",
      "r191"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 2.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after the effects of master netting arrangements, of funds outstanding loaned in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price. Includes purchases of participations in pools of securities that are subject to a resale agreement, assets not subject to a master netting arrangement and not elected to be offset.",
        "label": "Securities Purchased under Agreements to Resell",
        "terseLabel": "Securities purchased under collateralized agreements to resell (cost of $30,000 and $30,000, respectively)",
        "verboseLabel": "Fair value of securities purchased under collateralized agreements to resell"
       }
      }
     },
     "localname": "SecuritiesPurchasedUnderAgreementsToResell",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StatementClassOfStockAxis": {
     "auth_ref": [
      "r170",
      "r171",
      "r172",
      "r188",
      "r216",
      "r217",
      "r221",
      "r223",
      "r232",
      "r233",
      "r254",
      "r274",
      "r276",
      "r277",
      "r278",
      "r281",
      "r282",
      "r304",
      "r305",
      "r307",
      "r308",
      "r310",
      "r373",
      "r502",
      "r628",
      "r632",
      "r640"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by the different classes of stock of the entity.",
        "label": "Class of Stock [Axis]",
        "terseLabel": "Class of Stock [Axis]"
       }
      }
     },
     "localname": "StatementClassOfStockAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementEquityComponentsAxis": {
     "auth_ref": [
      "r17",
      "r65",
      "r163",
      "r178",
      "r179",
      "r180",
      "r194",
      "r195",
      "r196",
      "r200",
      "r208",
      "r210",
      "r229",
      "r255",
      "r311",
      "r324",
      "r325",
      "r326",
      "r338",
      "r339",
      "r356",
      "r377",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r391",
      "r458",
      "r459",
      "r460"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by component of equity.",
        "label": "Equity Components [Axis]",
        "terseLabel": "Equity Components [Axis]"
       }
      }
     },
     "localname": "StatementEquityComponentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets",
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails",
      "http://www.newmountainfinance.com/role/RelatedPartiesDetails",
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Statement [Line Items]",
        "terseLabel": "Statement [Line Items]"
       }
      }
     },
     "localname": "StatementLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfCashFlowsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Cash Flows [Abstract]"
       }
      }
     },
     "localname": "StatementOfCashFlowsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfFinancialPositionAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Financial Position [Abstract]"
       }
      }
     },
     "localname": "StatementOfFinancialPositionAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Stockholders' Equity [Abstract]"
       }
      }
     },
     "localname": "StatementOfStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementTable": {
     "auth_ref": [
      "r194",
      "r195",
      "r196",
      "r229",
      "r436"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule reflecting a Statement of Income, Statement of Cash Flows, Statement of Financial Position, Statement of Shareholders' Equity and Other Comprehensive Income, or other statement as needed.",
        "label": "Statement [Table]",
        "terseLabel": "Statement [Table]"
       }
      }
     },
     "localname": "StatementTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockIssued1": {
     "auth_ref": [
      "r42",
      "r43",
      "r44"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The fair value of stock issued in noncash financing activities.",
        "label": "Stock Issued",
        "terseLabel": "Value of shares reissued from repurchase program in connection with the distribution reinvestment plan"
       }
      }
     },
     "localname": "StockIssued1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan": {
     "auth_ref": [
      "r65"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets": {
       "order": 2.0,
       "parentTag": "us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity.",
        "label": "Stock Issued During Period, Shares, Dividend Reinvestment Plan",
        "terseLabel": "Shares issued from the reinvestment of distributions (in shares)"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesDividendReinvestmentPlan",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesNewIssues": {
     "auth_ref": [
      "r4",
      "r5",
      "r65",
      "r71"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets": {
       "order": 1.0,
       "parentTag": "us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of new stock issued during the period.",
        "label": "Stock Issued During Period, Shares, New Issues",
        "terseLabel": "Shares sold (in shares)"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesNewIssues",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease": {
     "auth_ref": [
      "r65"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the period in the number of shares issued.",
        "label": "Stock Issued During Period, Shares, Period Increase (Decrease)",
        "totalLabel": "Net increase in shares outstanding (in shares)"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesPeriodIncreaseDecrease",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan": {
     "auth_ref": [
      "r65"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets": {
       "order": 4.0,
       "parentTag": "nmfc_InvestmentCompanyCapitalTransactionsIncreaseDecrease",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value of stock issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the holder of the stock to reinvest dividends paid to them by the entity on new issues of stock by the entity.",
        "label": "Stock Issued During Period, Value, Dividend Reinvestment Plan",
        "terseLabel": "Reinvestment of distributions"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueDividendReinvestmentPlan",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueNewIssues": {
     "auth_ref": [
      "r4",
      "r5",
      "r65",
      "r71"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets": {
       "order": 1.0,
       "parentTag": "nmfc_InvestmentCompanyCapitalTransactionsIncreaseDecrease",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.",
        "label": "Stock Issued During Period, Value, New Issues",
        "terseLabel": "Net proceeds from shares sold"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueNewIssues",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockRepurchaseProgramAuthorizedAmount1": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of stock repurchase plan authorized.",
        "label": "Stock Repurchase Program, Authorized Amount",
        "terseLabel": "Stock repurchase program, authorized amount"
       }
      }
     },
     "localname": "StockRepurchaseProgramAuthorizedAmount1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquity": {
     "auth_ref": [
      "r5",
      "r8",
      "r9",
      "r55",
      "r529",
      "r634",
      "r647",
      "r662"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 1.0,
       "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.",
        "label": "Stockholders' Equity Attributable to Parent",
        "totalLabel": "Total net assets of New Mountain Finance Corporation"
       }
      }
     },
     "localname": "StockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Stockholders' Equity Attributable to Parent [Abstract]",
        "terseLabel": "Net assets"
       }
      }
     },
     "localname": "StockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r74",
      "r75",
      "r77",
      "r163",
      "r164",
      "r179",
      "r194",
      "r195",
      "r196",
      "r200",
      "r208",
      "r255",
      "r311",
      "r324",
      "r325",
      "r326",
      "r338",
      "r339",
      "r356",
      "r377",
      "r378",
      "r382",
      "r391",
      "r459",
      "r460",
      "r634",
      "r647",
      "r662"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 3.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.",
        "label": "Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest",
        "periodEndLabel": "End of the period",
        "periodStartLabel": "Beginning of the period",
        "totalLabel": "Total net assets"
       }
      }
     },
     "localname": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets",
      "http://www.newmountainfinance.com/role/NetAssetsRollforwardofNetAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquityPeriodIncreaseDecrease": {
     "auth_ref": [
      "r65",
      "r71"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) in stockholders' equity during the period.",
        "label": "Stockholders' Equity, Period Increase (Decrease)",
        "totalLabel": "Net increase in net assets"
       }
      }
     },
     "localname": "StockholdersEquityPeriodIncreaseDecrease",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquityPolicyTextBlock": {
     "auth_ref": [
      "r64"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for its capital stock transactions, including dividends and accumulated other comprehensive income.",
        "label": "Stockholders' Equity, Policy [Policy Text Block]",
        "terseLabel": "Stock repurchase program"
       }
      }
     },
     "localname": "StockholdersEquityPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SubordinatedDebtMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This element represents domestic or foreign subordinated debt. Subordinated debt has a lower priority of repayment in liquidation of the entity's assets.",
        "label": "Subordinated Debt [Member]",
        "terseLabel": "Subordinated"
       }
      }
     },
     "localname": "SubordinatedDebtMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/FairValueFairValueLevelsDetails",
      "http://www.newmountainfinance.com/role/FairValueLevelIIIRollforwardDetails",
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SubsequentEventLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.",
        "label": "Subsequent Event [Line Items]",
        "terseLabel": "Subsequent Event [Line Items]"
       }
      }
     },
     "localname": "SubsequentEventLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SubsequentEventsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventMember": {
     "auth_ref": [
      "r383",
      "r402"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Identifies event that occurred after the balance sheet date but before financial statements are issued or available to be issued.",
        "label": "Subsequent Event [Member]",
        "terseLabel": "Subsequent Event"
       }
      }
     },
     "localname": "SubsequentEventMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/SubsequentEventsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SubsequentEventTable": {
     "auth_ref": [
      "r383",
      "r402"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Discloses pertinent information about one or more significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued.",
        "label": "Subsequent Event [Table]",
        "terseLabel": "Subsequent Event [Table]"
       }
      }
     },
     "localname": "SubsequentEventTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SubsequentEventsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventTypeAxis": {
     "auth_ref": [
      "r383",
      "r402"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by event that occurred after the balance sheet date but before financial statements are issued or available to be issued.",
        "label": "Subsequent Event Type [Axis]",
        "terseLabel": "Subsequent Event Type [Axis]"
       }
      }
     },
     "localname": "SubsequentEventTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/SubsequentEventsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventTypeDomain": {
     "auth_ref": [
      "r383",
      "r402"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Event that occurred after the balance sheet date but before financial statements are issued or available to be issued.",
        "label": "Subsequent Event Type [Domain]",
        "terseLabel": "Subsequent Event Type [Domain]"
       }
      }
     },
     "localname": "SubsequentEventTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails",
      "http://www.newmountainfinance.com/role/SubsequentEventsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SubsequentEventsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Subsequent Events [Abstract]"
       }
      }
     },
     "localname": "SubsequentEventsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventsTextBlock": {
     "auth_ref": [
      "r401",
      "r403"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.",
        "label": "Subsequent Events [Text Block]",
        "terseLabel": "Subsequent Events"
       }
      }
     },
     "localname": "SubsequentEventsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SubsequentEvents"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SubsidiarySaleOfStockAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of sale of the entity's stock.",
        "label": "Sale of Stock [Axis]",
        "terseLabel": "Sale of Stock [Axis]"
       }
      }
     },
     "localname": "SubsidiarySaleOfStockAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/NetAssetsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SupplementalCashFlowInformationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Supplemental Cash Flow Information [Abstract]",
        "terseLabel": "Supplemental disclosure of cash flow information"
       }
      }
     },
     "localname": "SupplementalCashFlowInformationAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_TechnologySectorMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sector of the economy consisting of companies engaged in technology-related business activities.",
        "label": "Technology Sector [Member]",
        "terseLabel": "Information Technology"
       }
      }
     },
     "localname": "TechnologySectorMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain": {
     "auth_ref": [
      "r251",
      "r252",
      "r299",
      "r309",
      "r354",
      "r404",
      "r405",
      "r406",
      "r407",
      "r408",
      "r409",
      "r410",
      "r411",
      "r412",
      "r413",
      "r414",
      "r415",
      "r416",
      "r417",
      "r419",
      "r420",
      "r421",
      "r422",
      "r423",
      "r424",
      "r425",
      "r426",
      "r427",
      "r428",
      "r429",
      "r430",
      "r431",
      "r432",
      "r433",
      "r434",
      "r644",
      "r645",
      "r646",
      "r679",
      "r680",
      "r681",
      "r682",
      "r683",
      "r684",
      "r685"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Instrument or contract that imposes a contractual obligation to deliver cash or another financial instrument or to exchange other financial instruments on potentially unfavorable terms and conveys a contractual right to receive cash or another financial instrument or to exchange other financial instruments on potentially favorable terms.",
        "label": "Financial Instruments [Domain]",
        "terseLabel": "Financial Instruments [Domain]"
       }
      }
     },
     "localname": "TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueFairValueLevelsDetails",
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TransportationSectorMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Transportation Sector [Member]",
        "terseLabel": "Distribution &amp; Logistics"
       }
      }
     },
     "localname": "TransportationSectorMember",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments",
      "http://www.newmountainfinance.com/role/InvestmentsInvestmentCostandFairValuebyTypeandbyIndustryDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TreasuryStockValueAcquiredCostMethod": {
     "auth_ref": [
      "r65",
      "r71",
      "r72"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.",
        "label": "Treasury Stock, Value, Acquired, Cost Method",
        "terseLabel": "Common stock repurchased"
       }
      }
     },
     "localname": "TreasuryStockValueAcquiredCostMethod",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax": {
     "auth_ref": [],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets": {
       "order": 3.0,
       "parentTag": "us-gaap_ProfitLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "label": "Unrealized Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, before Tax",
        "terseLabel": "Net change in unrealized appreciation (depreciation) of investments and foreign currency",
        "verboseLabel": "Net Change In Unrealized Appreciation (Depreciation)"
       }
      }
     },
     "localname": "UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax",
     "nsuri": "http://fasb.org/us-gaap-sup/2022q3",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestmentsParenthetical",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofChangesinNetAssets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UnsecuredDebt": {
     "auth_ref": [
      "r3",
      "r107",
      "r124"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities": {
       "order": 2.0,
       "parentTag": "us-gaap_LongTermDebt",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).",
        "label": "Unsecured Debt",
        "terseLabel": "Unsecured Notes",
        "verboseLabel": "Unsecured Notes outstanding balance"
       }
      }
     },
     "localname": "UnsecuredDebt",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails",
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofAssetsandLiabilities"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UnsecuredDebtMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt obligation not collateralized by pledge of, mortgage of or other lien on the entity's assets.",
        "label": "Unsecured Debt [Member]",
        "terseLabel": "Unsecured Notes"
       }
      }
     },
     "localname": "UnsecuredDebtMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsUnsecuredNotesDetails",
      "http://www.newmountainfinance.com/role/FairValuePrincipalAmountsandFairValuesofBorrowingsDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_UseOfEstimates": {
     "auth_ref": [
      "r52",
      "r53",
      "r54",
      "r234",
      "r235",
      "r236",
      "r237"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles.",
        "label": "Use of Estimates, Policy [Policy Text Block]",
        "terseLabel": "Use of estimates"
       }
      }
     },
     "localname": "UseOfEstimates",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ValuationTechniqueAxis": {
     "auth_ref": [
      "r84"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by valuation approach and technique.",
        "label": "Valuation Approach and Technique [Axis]",
        "terseLabel": "Valuation Approach and Technique [Axis]"
       }
      }
     },
     "localname": "ValuationTechniqueAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ValuationTechniqueDomain": {
     "auth_ref": [
      "r84"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Valuation approach and technique.",
        "label": "Valuation Approach and Technique [Domain]",
        "terseLabel": "Valuation Approach and Technique [Domain]"
       }
      }
     },
     "localname": "ValuationTechniqueDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/FairValueUnobservableInputsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_VariableRateAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of variable rate.",
        "label": "Variable Rate [Axis]",
        "terseLabel": "Variable Rate [Axis]"
       }
      }
     },
     "localname": "VariableRateAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_VariableRateDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Interest rate that fluctuates over time as a result of an underlying benchmark interest rate or index.",
        "label": "Variable Rate [Domain]",
        "terseLabel": "Variable Rate [Domain]"
       }
      }
     },
     "localname": "VariableRateDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/BorrowingsDBCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsHoldingsCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMFCCreditFacilityDetails",
      "http://www.newmountainfinance.com/role/BorrowingsNMNLCCreditFacilityIIDetails",
      "http://www.newmountainfinance.com/role/BorrowingsSBAguaranteedDebenturesNarrativeDetails",
      "http://www.newmountainfinance.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_WarrantMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Security that gives the holder the right to purchase shares of stock in accordance with the terms of the instrument, usually upon payment of a specified amount.",
        "label": "Warrant [Member]",
        "terseLabel": "Warrants"
       }
      }
     },
     "localname": "WarrantMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedScheduleofInvestments"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding": {
     "auth_ref": [
      "r215",
      "r223"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.",
        "label": "Weighted Average Number of Shares Outstanding, Diluted",
        "terseLabel": "Weighted average shares of common stock outstanding - diluted (in shares)",
        "totalLabel": "Denominator for diluted weighted average share (in shares)"
       }
      }
     },
     "localname": "WeightedAverageNumberOfDilutedSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_WeightedAverageNumberOfSharesOutstandingBasic": {
     "auth_ref": [
      "r214",
      "r223"
     ],
     "calculation": {
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.",
        "label": "Weighted Average Number of Shares Outstanding, Basic",
        "netLabel": "Average weighted shares outstanding for the period - basic (in shares)",
        "terseLabel": "Weighted average shares of common stock outstanding - basic (in shares)",
        "verboseLabel": "Denominator for basic weighted average share (in shares)"
       }
      }
     },
     "localname": "WeightedAverageNumberOfSharesOutstandingBasic",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.newmountainfinance.com/role/ConsolidatedStatementsofOperations",
      "http://www.newmountainfinance.com/role/EarningsPerShareDetails",
      "http://www.newmountainfinance.com/role/FinancialHighlightsDetails"
     ],
     "xbrltype": "sharesItemType"
    }
   },
   "unitCount": 11
  }
 },
 "std_ref": {
  "r0": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "205",
   "URI": "https://asc.fasb.org/topic&trid=2122149",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r1": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(19))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r10": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(32))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r100": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r101": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r102": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r103": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r104": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(10))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r105": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(11))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r106": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(13))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r107": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(16))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r108": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(22))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r109": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(23))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r11": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19(b),22(b))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r110": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(3))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r111": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.15(3))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r112": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.15(5))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r113": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.15)",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r114": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.17)",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r115": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(22))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r116": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.2)",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r117": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.9)",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r118": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "470",
   "Subparagraph": "e",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r119": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "470",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r12": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19-26)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r120": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(16))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r121": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(1)(b))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r122": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(10))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r123": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(12))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r124": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(16))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r125": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(23)(a)(4))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r126": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(24))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r127": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(25))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r128": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.(a),19)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r129": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.15(a))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r13": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.22(a)(1))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r130": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.17)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r131": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.3)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r132": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(18))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r133": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04.2)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r134": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04.4)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r135": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04.7)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r136": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=6488101&loc=d3e8702-115831",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r137": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=66023616&loc=d3e9046-115832",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r138": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=66023616&loc=d3e9079-115832",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r139": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "205",
   "Subparagraph": "(c)",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=118262037&loc=d3e9915-115836",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r14": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.22(a)(5))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r140": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "205",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=25866437&loc=d3e10177-115837",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r141": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "205",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=25866437&loc=d3e10328-115837",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r142": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "205",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=25866437&loc=d3e10396-115837",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r143": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "205",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=25866437&loc=d3e10403-115837",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r144": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "205",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=25866437&loc=d3e10411-115837",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r145": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "205",
   "Subparagraph": "(a)",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=25866437&loc=d3e10246-115837",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r146": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "205",
   "Subparagraph": "(b)",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=25866437&loc=d3e10246-115837",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r147": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "205",
   "Subparagraph": "(c)",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=25866437&loc=d3e10246-115837",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r148": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "205",
   "Subparagraph": "(d)",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=25866437&loc=d3e10246-115837",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r149": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "205",
   "Subparagraph": "(e)",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=25866437&loc=d3e10246-115837",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r15": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.22)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r150": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "205",
   "Subparagraph": "(h)",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=25866437&loc=d3e10246-115837",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r151": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "205",
   "Topic": "946",
   "URI": "https://asc.fasb.org/subtopic&trid=2324234",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r152": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "210",
   "Subparagraph": "(b)",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r153": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "210",
   "Subparagraph": "(c)",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r154": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.6-04.12(3))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=120401414&loc=d3e603758-122996",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r155": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "220",
   "Subparagraph": "(k)",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=124433917&loc=SL114874205-224268",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r156": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.6-07.2(a),(b),(c),(d))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=120401555&loc=SL114874292-224272",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r157": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12)",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611133-123010",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r158": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-14(1)(a)(1))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611322-123010",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r159": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-14.1(b)(3))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611322-123010",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r16": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.25)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r160": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-14.1(b)(4))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611322-123010",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r161": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "946",
   "URI": "https://asc.fasb.org/subtopic&trid=2324412",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r162": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(n)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920",
   "role": "http://fasb.org/us-gaap/role/ref/otherTransitionRef"
  },
  "r163": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "105",
   "URI": "https://asc.fasb.org/extlink&oid=126987489&loc=SL124442142-165695",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r164": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "105",
   "URI": "https://asc.fasb.org/extlink&oid=126987489&loc=SL124442142-165695",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r165": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "105",
   "URI": "https://asc.fasb.org/extlink&oid=126987489&loc=SL124442142-165695",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r166": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r167": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(1))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r168": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(17))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r169": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(18))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r17": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.29-31)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r170": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(27)(b))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r171": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(28))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r172": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(29))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r173": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r174": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r175": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669619-108580",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r176": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669625-108580",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r177": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=124431353&loc=SL116659661-227067",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r178": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=124431353&loc=SL124442407-227067",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r179": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=124431353&loc=SL124442411-227067",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r18": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.31)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r180": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=124431353&loc=SL124452729-227067",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r181": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(210.5-03(11))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r182": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(25))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r183": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3367-108585",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r184": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3000-108585",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r185": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3521-108585",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r186": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3536-108585",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r187": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=d3e4297-108586",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r188": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(g)(1)(ii))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r189": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r19": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(20))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r190": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(m)(1)(iii))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r191": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(m)(2)(i)(A))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r192": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(m)(2)(ii))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r193": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.12-04(a))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r194": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "23",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124436220&loc=d3e21914-107793",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r195": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124436220&loc=d3e21930-107793",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r196": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124436220&loc=d3e21711-107793",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r197": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r198": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(1)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r199": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(2)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r2": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(20))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r20": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(8))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r200": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(3)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r201": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(4)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r202": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r203": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r204": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r205": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22583-107794",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r206": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22595-107794",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r207": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22644-107794",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r208": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22644-107794",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r209": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22658-107794",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r21": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.1(e))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r210": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22663-107794",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r211": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.M.Q2)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=122038215&loc=d3e31137-122693",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r212": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=122038215&loc=SL108384541-122693",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r213": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "250",
   "URI": "https://asc.fasb.org/topic&trid=2122394",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r214": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1448-109256",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r215": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1505-109256",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r216": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1252-109256",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r217": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1278-109256",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r218": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1930-109256",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r219": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "42",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e2029-109256",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r22": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.4)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r220": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=SL5780133-109256",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r221": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=SL5780133-109256",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r222": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1337-109256",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r223": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r224": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r225": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r226": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r227": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=128363288&loc=d3e3842-109258",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r228": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "260",
   "URI": "https://asc.fasb.org/topic&trid=2144383",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r229": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "272",
   "URI": "https://asc.fasb.org/extlink&oid=125520817&loc=d3e70191-108054",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r23": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.4,6)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r230": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "272",
   "URI": "https://asc.fasb.org/extlink&oid=125520817&loc=d3e70229-108054",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r231": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "272",
   "URI": "https://asc.fasb.org/extlink&oid=125520817&loc=d3e70258-108054",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r232": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "272",
   "URI": "https://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r233": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "272",
   "URI": "https://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r234": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r235": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r236": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e6161-108592",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r237": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e6191-108592",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r238": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r239": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r24": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.8)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r240": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r241": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r242": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r243": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r244": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r245": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r246": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r247": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r248": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "42",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r249": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(d)(1)",
   "Topic": "310",
   "URI": "https://asc.fasb.org/extlink&oid=126986314&loc=SL124402458-218513",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r25": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.9)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r250": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(d)(2)",
   "Topic": "310",
   "URI": "https://asc.fasb.org/extlink&oid=126986314&loc=SL124402458-218513",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r251": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r252": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=SL120269820-111563",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r253": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "323",
   "URI": "https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r254": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "323",
   "URI": "https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r255": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r256": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r257": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(2)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r258": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124255953&loc=SL82919244-210447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r259": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r26": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r260": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r261": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r262": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r263": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r264": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124269663&loc=SL82922895-210455",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r265": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r266": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r267": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "420",
   "URI": "https://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r268": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "440",
   "URI": "https://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r269": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "440",
   "URI": "https://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r27": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r270": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r271": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r272": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "20",
   "Subparagraph": "(SAB Topic 5.Y.Q2)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r273": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "20",
   "Subparagraph": "(SAB Topic 5.Y.Q4)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r274": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(i))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r275": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(iii)(A))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r276": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(iv))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r277": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(5))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r278": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(i))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r279": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iii)(A))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r28": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r280": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iii)(B))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r281": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iv))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r282": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(5))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r283": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r284": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r285": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r286": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r287": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(f)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r288": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r289": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r29": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r290": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r291": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r292": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1E",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r293": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1E",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r294": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1E",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r295": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r296": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r297": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r298": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r299": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1I",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r3": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(22))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r30": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r300": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r301": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r302": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466204&loc=SL6036836-161870",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r303": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466204&loc=SL6036836-161870",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r304": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r305": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r306": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r307": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r308": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496171-112644",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r309": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496189-112644",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r31": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r310": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r311": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.3-04)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r312": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(i)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r313": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(01)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r314": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r315": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(A)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r316": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(B)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r317": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(C)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r318": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(03)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r319": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(n)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r32": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3521-108585",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r320": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(d)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r321": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)(ii)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r322": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)(iii)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r323": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)(iv)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r324": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128097895&loc=SL121327923-165333",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r325": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(1)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128097895&loc=SL121327923-165333",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r326": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128097895&loc=SL121327923-165333",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r327": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=123427490&loc=d3e32247-109318",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r328": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=123427490&loc=d3e32280-109318",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r329": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=123427490&loc=d3e31917-109318",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r33": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3536-108585",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r330": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=123427490&loc=d3e31931-109318",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r331": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32672-109319",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r332": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r333": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32840-109319",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r334": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32847-109319",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r335": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r336": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r337": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r338": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)(2)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=126983759&loc=SL121830611-158277",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r339": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)(3)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=126983759&loc=SL121830611-158277",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r34": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3536-108585",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r340": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=126983759&loc=SL121830611-158277",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r341": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(2)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=126983759&loc=SL121830611-158277",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r342": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(3)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=126983759&loc=SL121830611-158277",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r343": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 6.I.7)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r344": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.Fact.1)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r345": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.Fact.2)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r346": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=123586238&loc=d3e38679-109324",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r347": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=126929396&loc=SL4569616-111683",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r348": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r349": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r35": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3536-108585",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r350": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r351": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r352": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bb)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=123419778&loc=d3e5710-111685",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r353": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=123419778&loc=d3e5710-111685",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r354": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(f)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126731327&loc=d3e90205-114008",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r355": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)(1)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r356": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)(3)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r357": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)(4)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r358": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r359": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(c)(1)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL126732908-238011",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r36": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r360": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(c)(2)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL126732908-238011",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r361": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(c)(3)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL126732908-238011",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r362": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r363": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r364": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r365": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r366": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(3)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r367": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r368": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r369": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2E",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=SL7498357-110258",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r37": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r370": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19279-110258",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r371": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123594809&loc=d3e13220-108610",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r372": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r373": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r374": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=126983955&loc=SL121967933-165497",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r375": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(2)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=126983955&loc=SL121967933-165497",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r376": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(3)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=126983955&loc=SL121967933-165497",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r377": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32136-110900",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r378": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r379": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r38": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r380": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(c)",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r381": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(d)",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r382": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r383": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=6450520&loc=d3e32618-110901",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r384": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "830",
   "URI": "https://asc.fasb.org/topic&trid=2175825",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r385": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "835",
   "URI": "https://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r386": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "https://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r387": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r388": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(1)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128293352&loc=SL126838806-209984",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r389": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(3)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128293352&loc=SL126838806-209984",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r39": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3044-108585",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r390": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "848",
   "URI": "https://asc.fasb.org/extlink&oid=125980421&loc=SL122150809-237846",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r391": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)(3)(iii)(03)",
   "Topic": "848",
   "URI": "https://asc.fasb.org/extlink&oid=125980421&loc=SL125981372-237846",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r392": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "848",
   "URI": "https://asc.fasb.org/extlink&oid=125980421&loc=SL125981372-237846",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r393": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r394": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r395": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r396": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r397": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r398": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39691-107864",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r399": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "850",
   "URI": "https://asc.fasb.org/topic&trid=2122745",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r4": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(28))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r40": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=d3e4273-108586",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r400": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "852",
   "URI": "https://asc.fasb.org/extlink&oid=124433192&loc=d3e56071-112765",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r401": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "855",
   "URI": "https://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r402": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "855",
   "URI": "https://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r403": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "855",
   "URI": "https://asc.fasb.org/topic&trid=2122774",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r404": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)(i)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r405": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)(ii)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r406": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r407": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r408": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r409": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r41": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=d3e4297-108586",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r410": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r411": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r412": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r413": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r414": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r415": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r416": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r417": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r418": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r419": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=109249958&loc=SL34722452-111729",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r42": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=d3e4304-108586",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r420": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r421": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r422": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r423": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(4)(i)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r424": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r425": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r426": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r427": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(4)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r428": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(5)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r429": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(6)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r43": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=d3e4313-108586",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r430": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(7)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r431": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(b)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r432": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(e)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r433": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(e)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r434": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(e)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r435": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "910",
   "URI": "https://asc.fasb.org/extlink&oid=126937589&loc=SL119991595-234733",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r436": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.L)",
   "Topic": "924",
   "URI": "https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r437": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(f)(1)",
   "Topic": "926",
   "URI": "https://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r438": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(f)(2)",
   "Topic": "926",
   "URI": "https://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r439": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(f)(3)",
   "Topic": "926",
   "URI": "https://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r44": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=d3e4332-108586",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r440": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e61929-109447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r441": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e61929-109447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r442": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e62059-109447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r443": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e62059-109447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r444": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e62395-109447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r445": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e62395-109447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r446": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "33",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e62479-109447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r447": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "33",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e62479-109447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r448": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "35A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=SL6807758-109447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r449": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "35A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=SL6807758-109447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r45": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=SL98516268-108586",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r450": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(c)(1)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e61872-109447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r451": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(c)(2)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e61872-109447",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r452": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(27))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r453": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.9-05(b)(2))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r454": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(2))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r455": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(23))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r456": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(9))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r457": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(d)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124506351&loc=SL117782755-158439",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r458": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r459": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)(1)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r46": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "235",
   "URI": "https://asc.fasb.org/topic&trid=2122369",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r460": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)(2)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r461": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(i)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r462": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(ii)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r463": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(iii)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r464": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(iv)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r465": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(h)(2)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r466": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "825",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=123600520&loc=SL75241803-196195",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r467": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "220",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=124439613&loc=SL124453110-224270",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r468": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 1))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r469": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 6))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r47": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r470": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 7))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r471": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r472": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 1))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r473": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 6))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r474": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 7))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r475": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r476": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 1))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r477": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 6))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r478": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 7))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r479": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r48": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r480": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5D",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13D(Column B)(Footnote 2))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=SL120429264-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r481": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5D",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13D(Column C)(Footnote 2))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=SL120429264-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r482": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5D",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13D(Column C))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=SL120429264-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r483": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column A))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611379-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r484": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column B))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611379-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r485": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column C))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611379-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r486": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column D))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611379-123010",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r487": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "310",
   "Subparagraph": "(SX 210.12-29(Footnote 4))",
   "Topic": "948",
   "URI": "https://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r488": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "310",
   "Topic": "954",
   "URI": "https://asc.fasb.org/extlink&oid=126942805&loc=d3e3115-115594",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r489": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "440",
   "Subparagraph": "(a)",
   "Topic": "954",
   "URI": "https://asc.fasb.org/extlink&oid=6491277&loc=d3e6429-115629",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r49": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "272",
   "URI": "https://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r490": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column B))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r491": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column C))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r492": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column D))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r493": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column E))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r494": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column F))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r495": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column G))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r496": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column H))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r497": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column I))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r498": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Footnote 2))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r499": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Footnote 4))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r5": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(29))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r50": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r500": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "310",
   "Subparagraph": "(c)",
   "Topic": "976",
   "URI": "https://asc.fasb.org/extlink&oid=6497875&loc=d3e22274-108663",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r501": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "310",
   "Subparagraph": "(b)",
   "Topic": "978",
   "URI": "https://asc.fasb.org/extlink&oid=126945304&loc=d3e27327-108691",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r502": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(a)",
   "Publisher": "SEC",
   "Section": "1402",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r503": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(b)",
   "Publisher": "SEC",
   "Section": "1402",
   "Subparagraph": "(1)",
   "role": "http://www.xbrl.org/2003/role/disclosureRef"
  },
  "r504": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r505": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=99393222&loc=SL20226024-175313",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r506": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=99393222&loc=SL20226049-175313",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r507": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r508": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=126899994&loc=d3e18823-107790",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r509": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=126899994&loc=d3e18823-107790",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r51": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r510": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "52",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=128363288&loc=d3e4984-109258",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r511": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r512": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "31",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8924-108599",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r513": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124267575&loc=SL82921835-210448",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r514": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Subparagraph": "(c)(1)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124267575&loc=SL82921835-210448",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r515": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r516": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r517": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "69B",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r518": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "69C",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r519": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "69E",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466577&loc=SL123495743-112612",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r52": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e6061-108592",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r520": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "69F",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466577&loc=SL123495745-112612",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r521": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r522": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920602&loc=SL49130690-203046-203046",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r523": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(ii)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r524": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(01)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r525": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r526": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "80",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r527": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4J",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=120409616&loc=SL4591551-111686",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r528": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4K",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=120409616&loc=SL4591552-111686",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r529": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "852",
   "URI": "https://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r53": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e6132-108592",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r530": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13H",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126561865&loc=SL117783719-158441",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r531": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29F",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126561865&loc=SL117819544-158441",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r532": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column B))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611379-123010",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r533": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column C))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611379-123010",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r534": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column D))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=122147990&loc=d3e611379-123010",
   "role": "http://www.xbrl.org/2003/role/exampleRef"
  },
  "r535": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r536": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r537": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b-2",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r538": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "d1-1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r539": {
   "Name": "Form 10-Q",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "308",
   "Subsection": "a",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r54": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e6143-108592",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r540": {
   "Name": "Form 20-F",
   "Number": "249",
   "Publisher": "SEC",
   "Section": "220",
   "Subsection": "f",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r541": {
   "Name": "Form 40-F",
   "Number": "249",
   "Publisher": "SEC",
   "Section": "240",
   "Subsection": "f",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r542": {
   "Name": "Form F-3",
   "Publisher": "SEC",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r543": {
   "Name": "Form N-2",
   "Publisher": "SEC",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r544": {
   "Name": "Form N-2",
   "Publisher": "SEC",
   "Section": "Item 10",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r545": {
   "Name": "Form N-2",
   "Paragraph": "a",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r546": {
   "Name": "Form N-2",
   "Paragraph": "a",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subparagraph": "1",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r547": {
   "Name": "Form N-2",
   "Paragraph": "a",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subparagraph": "2",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r548": {
   "Name": "Form N-2",
   "Paragraph": "a",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subparagraph": "3",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r549": {
   "Name": "Form N-2",
   "Paragraph": "a",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subparagraph": "4",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r55": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 4.E)",
   "Topic": "310",
   "URI": "https://asc.fasb.org/extlink&oid=122038336&loc=d3e74512-122707",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r550": {
   "Name": "Form N-2",
   "Paragraph": "a",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subparagraph": "5",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r551": {
   "Name": "Form N-2",
   "Paragraph": "a",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subparagraph": "6",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r552": {
   "Name": "Form N-2",
   "Paragraph": "a",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subparagraph": "Instruction 2",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r553": {
   "Name": "Form N-2",
   "Paragraph": "b",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subparagraph": "1",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r554": {
   "Name": "Form N-2",
   "Paragraph": "b",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subparagraph": "2",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r555": {
   "Name": "Form N-2",
   "Paragraph": "c",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r556": {
   "Name": "Form N-2",
   "Paragraph": "d",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r557": {
   "Name": "Form N-2",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subsection": "2",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r558": {
   "Name": "Form N-2",
   "Paragraph": "a",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subsection": "2",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r559": {
   "Name": "Form N-2",
   "Paragraph": "b",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subsection": "2",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r56": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "320",
   "URI": "https://asc.fasb.org/topic&trid=2196928",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r560": {
   "Name": "Form N-2",
   "Paragraph": "c",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subsection": "2",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r561": {
   "Name": "Form N-2",
   "Paragraph": "e",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subsection": "2",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r562": {
   "Name": "Form N-2",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subsection": "3",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r563": {
   "Name": "Form N-2",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subsection": "5",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r564": {
   "Name": "Form N-2",
   "Paragraph": "1",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subsection": "5",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r565": {
   "Name": "Form N-2",
   "Paragraph": "2",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subsection": "5",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r566": {
   "Name": "Form N-2",
   "Paragraph": "3",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subsection": "5",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r567": {
   "Name": "Form N-2",
   "Paragraph": "4",
   "Publisher": "SEC",
   "Section": "Item 10",
   "Subsection": "5",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r568": {
   "Name": "Form N-2",
   "Publisher": "SEC",
   "Section": "Item 3",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r569": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 1",
   "Publisher": "SEC",
   "Section": "Item 3",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r57": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r570": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 10",
   "Publisher": "SEC",
   "Section": "Item 3",
   "Subparagraph": "a",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r571": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 10",
   "Publisher": "SEC",
   "Section": "Item 3",
   "Subparagraph": "a, g, h",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r572": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 10",
   "Publisher": "SEC",
   "Section": "Item 3",
   "Subparagraph": "f",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r573": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 10",
   "Publisher": "SEC",
   "Section": "Item 3",
   "Subparagraph": "g",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r574": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 10",
   "Publisher": "SEC",
   "Section": "Item 3",
   "Subparagraph": "i",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r575": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 11",
   "Publisher": "SEC",
   "Section": "Item 3",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r576": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 4",
   "Publisher": "SEC",
   "Section": "Item 3",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r577": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 5",
   "Publisher": "SEC",
   "Section": "Item 3",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r578": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 6",
   "Publisher": "SEC",
   "Section": "Item 3",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r579": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 7",
   "Publisher": "SEC",
   "Section": "Item 3",
   "Subparagraph": "a",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r58": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "440",
   "URI": "https://asc.fasb.org/topic&trid=2144648",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r580": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 7",
   "Publisher": "SEC",
   "Section": "Item 3",
   "Subparagraph": "b",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r581": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 8",
   "Publisher": "SEC",
   "Section": "Item 3",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r582": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 9",
   "Publisher": "SEC",
   "Section": "Item 3",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r583": {
   "Name": "Form N-2",
   "Publisher": "SEC",
   "Section": "Item 4",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r584": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 2",
   "Publisher": "SEC",
   "Section": "Item 4",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r585": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 3",
   "Publisher": "SEC",
   "Section": "Item 4",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r586": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 8",
   "Publisher": "SEC",
   "Section": "Item 4",
   "Subsection": "1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r587": {
   "Name": "Form N-2",
   "Publisher": "SEC",
   "Section": "Item 4",
   "Subsection": "3",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r588": {
   "Name": "Form N-2",
   "Paragraph": "2",
   "Publisher": "SEC",
   "Section": "Item 4",
   "Subsection": "3",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r589": {
   "Name": "Form N-2",
   "Paragraph": "3",
   "Publisher": "SEC",
   "Section": "Item 4",
   "Subparagraph": "Instruction 2",
   "Subsection": "3",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r59": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123465755&loc=d3e1835-112601",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r590": {
   "Name": "Form N-2",
   "Paragraph": "4",
   "Publisher": "SEC",
   "Section": "Item 4",
   "Subparagraph": "Instruction 3",
   "Subsection": "3",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r591": {
   "Name": "Form N-2",
   "Paragraph": "5",
   "Publisher": "SEC",
   "Section": "Item 4",
   "Subsection": "3",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r592": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 1",
   "Publisher": "SEC",
   "Section": "Item 4",
   "Subsection": "3",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r593": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 4",
   "Publisher": "SEC",
   "Section": "Item 4",
   "Subsection": "3",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r594": {
   "Name": "Form N-2",
   "Paragraph": "Instruction 5",
   "Publisher": "SEC",
   "Section": "Item 4",
   "Subsection": "3",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r595": {
   "Name": "Form N-2",
   "Publisher": "SEC",
   "Section": "Item 8",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r596": {
   "Name": "Form N-2",
   "Paragraph": "b, d",
   "Publisher": "SEC",
   "Section": "Item 8",
   "Subsection": "2",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r597": {
   "Name": "Form N-2",
   "Paragraph": "a",
   "Publisher": "SEC",
   "Section": "Item 8",
   "Subsection": "3",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r598": {
   "Name": "Form N-2",
   "Paragraph": "b",
   "Publisher": "SEC",
   "Section": "Item 8",
   "Subsection": "3",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r599": {
   "Name": "Form N-2",
   "Paragraph": "b",
   "Publisher": "SEC",
   "Section": "Item 8",
   "Subparagraph": "1",
   "Subsection": "3",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r6": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(1))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r60": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123465755&loc=SL6230698-112601",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r600": {
   "Name": "Form N-2",
   "Paragraph": "b",
   "Publisher": "SEC",
   "Section": "Item 8",
   "Subparagraph": "2",
   "Subsection": "3",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r601": {
   "Name": "Form N-2",
   "Paragraph": "b",
   "Publisher": "SEC",
   "Section": "Item 8",
   "Subparagraph": "3",
   "Subsection": "3",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r602": {
   "Name": "Form N-2",
   "Paragraph": "b",
   "Publisher": "SEC",
   "Section": "Item 8",
   "Subsection": "5",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r603": {
   "Name": "Form N-2",
   "Paragraph": "b",
   "Publisher": "SEC",
   "Section": "Item 8",
   "Subparagraph": "4",
   "Subsection": "5",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r604": {
   "Name": "Form N-2",
   "Paragraph": "b",
   "Publisher": "SEC",
   "Section": "Item 8",
   "Subparagraph": "Instruction 2",
   "Subsection": "5",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r605": {
   "Name": "Form N-2",
   "Paragraph": "b",
   "Publisher": "SEC",
   "Section": "Item 8",
   "Subparagraph": "Instruction 3",
   "Subsection": "5",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r606": {
   "Name": "Form N-2",
   "Paragraph": "b",
   "Publisher": "SEC",
   "Section": "Item 8",
   "Subparagraph": "Instruction 4",
   "Subsection": "5",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r607": {
   "Name": "Form N-2",
   "Paragraph": "b",
   "Publisher": "SEC",
   "Section": "Item 8",
   "Subparagraph": "Instructions 4, 5",
   "Subsection": "5",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r608": {
   "Name": "Form N-2",
   "Paragraph": "c",
   "Publisher": "SEC",
   "Section": "Item 8",
   "Subsection": "5",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r609": {
   "Name": "Form N-2",
   "Paragraph": "e",
   "Publisher": "SEC",
   "Section": "Item 8",
   "Subsection": "5",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r61": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466302&loc=d3e4852-112606",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r610": {
   "Name": "Form N-3",
   "Publisher": "SEC",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r611": {
   "Name": "Form N-4",
   "Publisher": "SEC",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r612": {
   "Name": "Form N-6",
   "Publisher": "SEC",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r613": {
   "Name": "Form S-3",
   "Publisher": "SEC",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r614": {
   "Name": "Forms 10-K, 10-Q, 20-F",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13",
   "Subsection": "a-1",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r615": {
   "Name": "Investment Company Act",
   "Number": "270",
   "Publisher": "SEC",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r616": {
   "Name": "Regulation S-T",
   "Number": "232",
   "Publisher": "SEC",
   "Section": "313",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r617": {
   "Name": "Regulation S-T",
   "Number": "232",
   "Publisher": "SEC",
   "Section": "405",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r618": {
   "Name": "Securities Act",
   "Number": "230",
   "Publisher": "SEC",
   "Section": "405",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r619": {
   "Name": "Securities Act",
   "Number": "230",
   "Publisher": "SEC",
   "Section": "413",
   "Subsection": "b",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r62": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466204&loc=SL6031898-161870",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r620": {
   "Name": "Securities Act",
   "Number": "230",
   "Publisher": "SEC",
   "Section": "462",
   "Subsection": "b",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r621": {
   "Name": "Securities Act",
   "Number": "230",
   "Publisher": "SEC",
   "Section": "462",
   "Subsection": "c",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r622": {
   "Name": "Securities Act",
   "Number": "230",
   "Publisher": "SEC",
   "Section": "462",
   "Subsection": "d",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r623": {
   "Name": "Securities Act",
   "Number": "230",
   "Publisher": "SEC",
   "Section": "462",
   "Subsection": "e",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r624": {
   "Name": "Securities Act",
   "Number": "230",
   "Publisher": "SEC",
   "Section": "486",
   "Subsection": "a",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r625": {
   "Name": "Securities Act",
   "Number": "230",
   "Publisher": "SEC",
   "Section": "486",
   "Subsection": "b",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r626": {
   "Name": "Securities Act",
   "Number": "7A",
   "Publisher": "SEC",
   "Section": "B",
   "Subsection": "2",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r627": {
   "Name": "Securities Act",
   "Publisher": "SEC",
   "Section": "8",
   "Subsection": "c",
   "role": "http://www.xbrl.org/2003/role/presentationRef"
  },
  "r628": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "272",
   "URI": "https://asc.fasb.org/extlink&oid=125520817&loc=d3e70229-108054",
   "role": "http://www.xbrl.org/2003/role/recommendedDisclosureRef"
  },
  "r629": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(1))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r63": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "470",
   "URI": "https://asc.fasb.org/topic&trid=2208564",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r630": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=124431353&loc=SL124452729-227067",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r631": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r632": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(d))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r633": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(f))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r634": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(g)(1)(ii))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r635": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h)(1)(Note 1))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r636": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.12-04(a))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r637": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "23",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124436220&loc=d3e21914-107793",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r638": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124436220&loc=d3e21930-107793",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r639": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124436220&loc=d3e21711-107793",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r64": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=d3e21459-112644",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r640": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "55",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e2626-109256",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r641": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r642": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r643": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r644": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "321",
   "URI": "https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r645": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "321",
   "URI": "https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r646": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "321",
   "URI": "https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r647": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "323",
   "URI": "https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r648": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(c)",
   "Topic": "410",
   "URI": "https://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r649": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r65": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r650": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r651": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r652": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "450",
   "URI": "https://asc.fasb.org/topic&trid=2127136",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r653": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(ii))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r654": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(iii))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r655": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r656": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r657": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r658": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(n)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r659": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)(3)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r66": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r660": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r661": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r662": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r663": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=125521441&loc=d3e30690-110894",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r664": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=124440516&loc=d3e30840-110895",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r665": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "230",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=123444420&loc=d3e33268-110906",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r666": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r667": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r668": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r669": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "852",
   "URI": "https://asc.fasb.org/extlink&oid=124433192&loc=SL2890621-112765",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r67": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=d3e21506-112644",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r670": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "852",
   "URI": "https://asc.fasb.org/extlink&oid=124433192&loc=SL2890621-112765",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r671": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r672": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r673": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r674": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r675": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r676": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r677": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(3)(b))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r678": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "825",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=123600520&loc=SL75241803-196195",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r679": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(a)",
   "Publisher": "SEC",
   "Section": "1402",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r68": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=d3e21506-112644",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r680": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(b)",
   "Publisher": "SEC",
   "Section": "1402",
   "Subparagraph": "(1)",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r681": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(b)",
   "Publisher": "SEC",
   "Section": "1402",
   "Subparagraph": "(2)",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r682": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(b)",
   "Publisher": "SEC",
   "Section": "1402",
   "Subparagraph": "(3)",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r683": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(c)",
   "Publisher": "SEC",
   "Section": "1402",
   "Subparagraph": "(2)(i)",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r684": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(c)",
   "Publisher": "SEC",
   "Section": "1402",
   "Subparagraph": "(2)(ii)",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r685": {
   "Name": "Regulation S-K (SK)",
   "Number": "229",
   "Paragraph": "(c)",
   "Publisher": "SEC",
   "Section": "1402",
   "Subparagraph": "(2)(iii)",
   "role": "http://www.xbrl.org/2009/role/commonPracticeRef"
  },
  "r69": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=d3e21521-112644",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r7": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(3))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r70": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=d3e21538-112644",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r71": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.3-04)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r72": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r73": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.7)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r74": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=126929396&loc=SL4568447-111683",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r75": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=126929396&loc=SL4568740-111683",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r76": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r77": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4I",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=120409616&loc=SL4590271-111686",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r78": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4J",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=120409616&loc=SL4591551-111686",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r79": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "810",
   "URI": "https://asc.fasb.org/topic&trid=2197479",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r8": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r80": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "54B",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126972413&loc=SL7495116-110257",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r81": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "59",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126972413&loc=SL6740821-110257",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r82": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r83": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r84": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r85": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r86": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r87": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19279-110258",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r88": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=SL6742756-110258",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r89": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=SL6742756-110258",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r9": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(31))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r90": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123594938&loc=d3e13467-108611",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r91": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123594938&loc=d3e13476-108611",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r92": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r93": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r94": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "230",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=123444420&loc=d3e33268-110906",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r95": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "05",
   "SubTopic": "10",
   "Topic": "835",
   "URI": "https://asc.fasb.org/extlink&oid=28365394&loc=d3e23770-108382",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r96": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "https://asc.fasb.org/extlink&oid=124435984&loc=d3e28541-108399",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r97": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r98": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "https://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  },
  "r99": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "https://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400",
   "role": "http://fasb.org/us-gaap/role/ref/legacyRef"
  }
 },
 "version": "2.2"
}
