{ "instance": { "onegas10-k2019.htm": { "axisCustom": 2, "axisStandard": 12, "contextCount": 283, "dts": { "calculationLink": { "local": [ "ogs-20191231_cal.xml" ] }, "definitionLink": { "local": [ "ogs-20191231_def.xml" ], "remote": [ "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-eedm-def-2019-01-31.xml", "http://xbrl.fasb.org/srt/2019/elts/srt-eedm1-def-2019-01-31.xml" ] }, "inline": { "local": [ "onegas10-k2019.htm" ] }, "labelLink": { "local": [ "ogs-20191231_lab.xml" ], "remote": [ "https://xbrl.sec.gov/dei/2019/dei-doc-2019-01-31.xml", "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-doc-2019-01-31.xml" ] }, "presentationLink": { "local": [ "ogs-20191231_pre.xml" ] }, "referenceLink": { "remote": [ "https://xbrl.sec.gov/dei/2019/dei-ref-2019-01-31.xml", "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-ref-2019-01-31.xml" ] }, "schema": { "local": [ "ogs-20191231.xsd" ], "remote": [ "http://xbrl.fasb.org/srt/2019/elts/srt-types-2019-01-31.xsd", "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/dtr/type/numeric-2009-12-16.xsd", "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd", "http://www.xbrl.org/2006/ref-2006-02-27.xsd", "http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd", "http://www.xbrl.org/2005/xbrldt-2005.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-roles-2019-01-31.xsd", "http://xbrl.fasb.org/srt/2019/elts/srt-roles-2019-01-31.xsd", "https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-types-2019-01-31.xsd", "http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd", "https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd", "https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd", "https://xbrl.sec.gov/exch/2019/exch-2019-01-31.xsd", "http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd", "http://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd", "http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd", "https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd", "http://www.xbrl.org/lrr/role/deprecated-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-parts-codification-2019-01-31.xsd" ] } }, "elementCount": 642, "entityCount": 1, "hidden": { "http://fasb.org/us-gaap/2019-01-31": 48, "http://www.onegas.com/20191231": 23, "http://xbrl.sec.gov/dei/2019-01-31": 6, "total": 77 }, "keyCustom": 75, "keyStandard": 429, "memberCustom": 33, "memberStandard": 27, "nsprefix": "ogs", "nsuri": "http://www.onegas.com/20191231", "report": { "R1": { "firstAnchor": { "ancestors": [ "span", "span", "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "dei:EntityFileNumber", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "document", "isDefault": "true", "longName": "0001000 - Document - Document And Entity Information", "role": "http://www.onegas.com/role/DocumentAndEntityInformation", "shortName": "Document And Entity Information", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "dei:EntityFileNumber", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R10": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RevenueFromContractWithCustomerTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2112100 - Disclosure - REVENUE (Notes)", "role": "http://www.onegas.com/role/RevenueNotes", "shortName": "REVENUE (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RevenueFromContractWithCustomerTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R11": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ShortTermDebtTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2114100 - Disclosure - CREDIT FACILITY AND SHORT-TERM NOTES PAYABLE (Notes)", "role": "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableNotes", "shortName": "CREDIT FACILITY AND SHORT-TERM NOTES PAYABLE (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ShortTermDebtTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R12": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LongTermDebtTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2115100 - Disclosure - LONG-TERM DEBT (Notes)", "role": "http://www.onegas.com/role/LongTermDebtNotes", "shortName": "LONG-TERM DEBT (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LongTermDebtTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R13": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:StockholdersEquityNoteDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2117100 - Disclosure - EQUITY (Notes)", "role": "http://www.onegas.com/role/EquityNotes", "shortName": "EQUITY (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:StockholdersEquityNoteDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R14": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ComprehensiveIncomeNoteTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2118100 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Notes)", "role": "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossNotes", "shortName": "ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ComprehensiveIncomeNoteTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R15": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2119100 - Disclosure - EARNINGS PER SHARE (Notes)", "role": "http://www.onegas.com/role/EarningsPerShareNotes", "shortName": "EARNINGS PER SHARE (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R16": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2120100 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Notes)", "role": "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsNotes", "shortName": "DERIVATIVE FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R17": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfRegulatoryAssetsAndLiabilitiesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2121100 - Disclosure - REGULATORY ASSETS AND LIABILITIES (Notes)", "role": "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesNotes", "shortName": "REGULATORY ASSETS AND LIABILITIES (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfRegulatoryAssetsAndLiabilitiesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R18": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2122100 - Disclosure - PROPERTY, PLANT AND EQUIPMENT (Notes)", "role": "http://www.onegas.com/role/PropertyPlantAndEquipmentNotes", "shortName": "PROPERTY, PLANT AND EQUIPMENT (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R19": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2124100 - Disclosure - SHARE-BASED PAYMENTS (Notes)", "role": "http://www.onegas.com/role/ShareBasedPaymentsNotes", "shortName": "SHARE-BASED PAYMENTS (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R2": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:Revenues", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1001000 - Statement - STATEMENTS OF INCOME", "role": "http://www.onegas.com/role/StatementsOfIncome", "shortName": "STATEMENTS OF INCOME", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:Revenues", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R20": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2126100 - Disclosure - EMPLOYEE BENEFIT PLANS (Notes)", "role": "http://www.onegas.com/role/EmployeeBenefitPlansNotes", "shortName": "EMPLOYEE BENEFIT PLANS (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R21": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2127100 - Disclosure - INCOME TAXES (Notes)", "role": "http://www.onegas.com/role/IncomeTaxesNotes", "shortName": "INCOME TAXES (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R22": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock", "reportCount": 1, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2128100 - Disclosure - OTHER INCOME AND EXPENSE (Notes)", "role": "http://www.onegas.com/role/OtherIncomeAndExpenseNotes", "shortName": "OTHER INCOME AND EXPENSE (Notes)", "subGroupType": "", "uniqueAnchor": null }, "R23": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2129100 - Disclosure - COMMITMENTS AND CONTINGENCIES (Notes)", "role": "http://www.onegas.com/role/CommitmentsAndContingenciesNotes", "shortName": "COMMITMENTS AND CONTINGENCIES (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R24": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:QuarterlyFinancialInformationTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2130100 - Disclosure - QUARTERLY FINANCIAL DATA (UNAUDITED) (Notes)", "role": "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedNotes", "shortName": "QUARTERLY FINANCIAL DATA (UNAUDITED) (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:QuarterlyFinancialInformationTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R25": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LesseeOperatingLeasesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2131100 - Disclosure - LEASES (Notes)", "role": "http://www.onegas.com/role/LeasesNotes", "shortName": "LEASES (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LesseeOperatingLeasesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R26": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:BasisOfAccountingPolicyPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2201201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)", "role": "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies", "shortName": "SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)", "subGroupType": "policies", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:BasisOfAccountingPolicyPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R27": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RevenueFromContractWithCustomerPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2212201 - Disclosure - REVENUE Revenue Recognition (Policies)", "role": "http://www.onegas.com/role/RevenueRevenueRecognitionPolicies", "shortName": "REVENUE Revenue Recognition (Policies)", "subGroupType": "policies", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RevenueFromContractWithCustomerPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R28": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LesseeLeasesPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2231201 - Disclosure - LEASES (Policies)", "role": "http://www.onegas.com/role/LeasesPolicies", "shortName": "LEASES (Policies)", "subGroupType": "policies", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LesseeLeasesPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R29": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2312302 - Disclosure - REVENUE (Tables)", "role": "http://www.onegas.com/role/RevenueTables", "shortName": "REVENUE (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R3": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:NetIncomeLoss", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1003000 - Statement - STATEMENTS OF COMPREHENSIVE INCOME STATEMENTS OF COMPREHENSIVE INCOME", "role": "http://www.onegas.com/role/StatementsOfComprehensiveIncomeStatementsOfComprehensiveIncome", "shortName": "STATEMENTS OF COMPREHENSIVE INCOME STATEMENTS OF COMPREHENSIVE INCOME", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "-3", "lang": null, "name": "us-gaap:ComprehensiveIncomeNetOfTax", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R30": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2318301 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)", "role": "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossTables", "shortName": "ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R31": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2319301 - Disclosure - EARNINGS PER SHARE (Tables)", "role": "http://www.onegas.com/role/EarningsPerShareTables", "shortName": "EARNINGS PER SHARE (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R32": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "ogs:SCHEDULEOFREGULATEDASSETSANDLIABILITIESTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2321301 - Disclosure - REGULATORY ASSETS AND LIABILITIES (Tables)", "role": "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesTables", "shortName": "REGULATORY ASSETS AND LIABILITIES (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "ogs:SCHEDULEOFREGULATEDASSETSANDLIABILITIESTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R33": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD_us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis_us-gaap_RegulatedOperationMember", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2322301 - Disclosure - PROPERTY, PLANT AND EQUIPMENT (Tables)", "role": "http://www.onegas.com/role/PropertyPlantAndEquipmentTables", "shortName": "PROPERTY, PLANT AND EQUIPMENT (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD_us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis_us-gaap_RegulatedOperationMember", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R34": { "firstAnchor": { "ancestors": [ "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2324301 - Disclosure - SHARE-BASED PAYMENTS (Tables)", "role": "http://www.onegas.com/role/ShareBasedPaymentsTables", "shortName": "SHARE-BASED PAYMENTS (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R35": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfAssumptionsUsedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2326301 - Disclosure - EMPLOYEE BENEFIT PLANS (Tables)", "role": "http://www.onegas.com/role/EmployeeBenefitPlansTables", "shortName": "EMPLOYEE BENEFIT PLANS (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfAssumptionsUsedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R36": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2327301 - Disclosure - INCOME TAXES (Tables)", "role": "http://www.onegas.com/role/IncomeTaxesTables", "shortName": "INCOME TAXES (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R37": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock", "reportCount": 1, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2328301 - Disclosure - OTHER INCOME AND EXPENSE (Tables)", "role": "http://www.onegas.com/role/OtherIncomeAndExpenseTables", "shortName": "OTHER INCOME AND EXPENSE (Tables)", "subGroupType": "tables", "uniqueAnchor": null }, "R38": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2330301 - Disclosure - QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)", "role": "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedTables", "shortName": "QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R39": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "ogs:OtherInformationRelatedtoOperatingLeasesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2331302 - Disclosure - LEASES (Tables)", "role": "http://www.onegas.com/role/LeasesTables", "shortName": "LEASES (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "ogs:OtherInformationRelatedtoOperatingLeasesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R4": { "firstAnchor": null, "groupType": "statement", "isDefault": "false", "longName": "1003501 - Statement - STATEMENTS OF COMPREHENSIVE INCOME (Parentheticals)", "role": "http://www.onegas.com/role/StatementsOfComprehensiveIncomeParentheticals", "shortName": "STATEMENTS OF COMPREHENSIVE INCOME (Parentheticals)", "subGroupType": "parenthetical", "uniqueAnchor": null }, "R40": { "firstAnchor": { "ancestors": [ "span", "span", "div", "us-gaap:SegmentReportingPolicyPolicyTextBlock", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "0", "first": true, "lang": null, "name": "ogs:SegmentReportingDisclosureofMajorCustomer", "reportCount": 1, "unique": true, "unitRef": "number", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2401402 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)", "role": "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesDetails", "shortName": "SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "us-gaap:SegmentReportingPolicyPolicyTextBlock", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "0", "first": true, "lang": null, "name": "ogs:SegmentReportingDisclosureofMajorCustomer", "reportCount": 1, "unique": true, "unitRef": "number", "xsiNil": "false" } }, "R41": { "firstAnchor": { "ancestors": [ "span", "span", "div", "us-gaap:RevenueFromContractWithCustomerPolicyTextBlock", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:UnbilledReceivablesCurrent", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2412403 - Disclosure - REVENUE (Details)", "role": "http://www.onegas.com/role/RevenueDetails", "shortName": "REVENUE (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "-3", "lang": null, "name": "us-gaap:RegulatedOperatingRevenueOther", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R42": { "firstAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:RatioOfIndebtednessToNetCapital1", "reportCount": 1, "unique": true, "unitRef": "number", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2414402 - Disclosure - CREDIT FACILITY AND SHORT-TERM NOTES PAYABLE (Details)", "role": "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails", "shortName": "CREDIT FACILITY AND SHORT-TERM NOTES PAYABLE (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:RatioOfIndebtednessToNetCapital1", "reportCount": 1, "unique": true, "unitRef": "number", "xsiNil": "false" } }, "R43": { "firstAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4", "decimals": "-6", "first": true, "lang": null, "name": "ogs:DebtInstrumentCovenantComplianceDefaultProvisionIndebtnednessThreshold", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2415402 - Disclosure - LONG-TERM DEBT (Details)", "role": "http://www.onegas.com/role/LongTermDebtDetails", "shortName": "LONG-TERM DEBT (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4", "decimals": "-6", "first": true, "lang": null, "name": "ogs:DebtInstrumentCovenantComplianceDefaultProvisionIndebtnednessThreshold", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R44": { "firstAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4QTD", "decimals": "2", "first": true, "lang": null, "name": "us-gaap:CommonStockDividendsPerShareCashPaid", "reportCount": 1, "unique": true, "unitRef": "usdPerShare", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2417402 - Disclosure - EQUITY (Details)", "role": "http://www.onegas.com/role/EquityDetails", "shortName": "EQUITY (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4QTD", "decimals": "2", "first": true, "lang": null, "name": "us-gaap:CommonStockDividendsPerShareCashPaid", "reportCount": 1, "unique": true, "unitRef": "usdPerShare", "xsiNil": "false" } }, "R45": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2018Q4", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2418402 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details)", "role": "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "shortName": "ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "-3", "lang": null, "name": "us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R46": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4QTD", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:NetIncomeLoss", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2419402 - Disclosure - EARNINGS PER SHARE (Details)", "role": "http://www.onegas.com/role/EarningsPerShareDetails", "shortName": "EARNINGS PER SHARE (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "-3", "lang": null, "name": "us-gaap:DilutiveSecurities", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R47": { "firstAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4", "decimals": "-2", "first": true, "lang": null, "name": "us-gaap:DerivativeNonmonetaryNotionalAmount", "reportCount": 1, "unique": true, "unitRef": "mmcf", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2420401 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details)", "role": "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails", "shortName": "DERIVATIVE FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4", "decimals": "-2", "first": true, "lang": null, "name": "us-gaap:DerivativeNonmonetaryNotionalAmount", "reportCount": 1, "unique": true, "unitRef": "mmcf", "xsiNil": "false" } }, "R48": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "reportCount": 1, "unique": true, "unitRef": "number", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2421402 - Disclosure - REGULATORY ASSETS AND LIABILITIES (Details)", "role": "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails", "shortName": "REGULATORY ASSETS AND LIABILITIES (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "reportCount": 1, "unique": true, "unitRef": "number", "xsiNil": "false" } }, "R49": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantInService", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2422402 - Disclosure - PROPERTY, PLANT AND EQUIPMENT (Details)", "role": "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails", "shortName": "PROPERTY, PLANT AND EQUIPMENT (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:PropertyPlantAndEquipmentTextBlock", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4_us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis_us-gaap_RegulatedOperationMember", "decimals": "-3", "lang": null, "name": "us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantInService", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R5": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantInService", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1004000 - Statement - BALANCE SHEETS", "role": "http://www.onegas.com/role/BalanceSheets", "shortName": "BALANCE SHEETS", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4", "decimals": "-3", "lang": null, "name": "us-gaap:ReceivablesNetCurrent", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R50": { "firstAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:CommonStockCapitalSharesReservedForFutureIssuance", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2424402 - Disclosure - SHARE-BASED PAYMENTS (Details)", "role": "http://www.onegas.com/role/ShareBasedPaymentsDetails", "shortName": "SHARE-BASED PAYMENTS (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:CommonStockCapitalSharesReservedForFutureIssuance", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" } }, "R51": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:RegulatoryAssetsNoncurrent", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2426402 - Disclosure - EMPLOYEE BENEFIT PLANS (Details)", "role": "http://www.onegas.com/role/EmployeeBenefitPlansDetails", "shortName": "EMPLOYEE BENEFIT PLANS (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "-5", "lang": null, "name": "us-gaap:DefinedBenefitPlanBenefitObligationPaymentForSettlement", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R52": { "firstAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2018Q4YTD", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:TaxCutsAndJobsActOf2017MeasurementPeriodAdjustmentIncomeTaxExpenseBenefit", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2427402 - Disclosure - INCOME TAXES (Details)", "role": "http://www.onegas.com/role/IncomeTaxesDetails", "shortName": "INCOME TAXES (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2018Q4YTD", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:TaxCutsAndJobsActOf2017MeasurementPeriodAdjustmentIncomeTaxExpenseBenefit", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R53": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2428402 - Disclosure - OTHER INCOME AND EXPENSE (Details)", "role": "http://www.onegas.com/role/OtherIncomeAndExpenseDetails", "shortName": "OTHER INCOME AND EXPENSE (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R54": { "firstAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4", "decimals": "0", "first": true, "lang": null, "name": "ogs:NumberOfFormerManufacturedGasSitesWhereWeOwnOrRetainLegalResponsibilityForEnvironmentalConditions", "reportCount": 1, "unique": true, "unitRef": "number", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2429401 - Disclosure - COMMITMENTS AND CONTINGENCIES - (Details)", "role": "http://www.onegas.com/role/CommitmentsAndContingenciesDetails", "shortName": "COMMITMENTS AND CONTINGENCIES - (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2019Q4", "decimals": "0", "first": true, "lang": null, "name": "ogs:NumberOfFormerManufacturedGasSitesWhereWeOwnOrRetainLegalResponsibilityForEnvironmentalConditions", "reportCount": 1, "unique": true, "unitRef": "number", "xsiNil": "false" } }, "R55": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4QTD", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:RegulatedOperatingRevenueGas", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2430402 - Disclosure - QUARTERLY FINANCIAL DATA (UNAUDITED) (Details)", "role": "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedDetails", "shortName": "QUARTERLY FINANCIAL DATA (UNAUDITED) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4QTD", "decimals": "-3", "lang": null, "name": "us-gaap:OperatingIncomeLoss", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R56": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ogs:ScheduleofFutureMinimumRentalPaymentsforOperatingLeasesUnderASC840TableTextBlock", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2018Q4", "decimals": "-5", "first": true, "lang": null, "name": "ogs:OperatingLeasesFutureMinimumPaymentsDueunderASC840", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2431403 - Disclosure - LEASES (Details)", "role": "http://www.onegas.com/role/LeasesDetails", "shortName": "LEASES (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ogs:ScheduleofFutureMinimumRentalPaymentsforOperatingLeasesUnderASC840TableTextBlock", "ix:continuation", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FI2018Q4", "decimals": "-5", "first": true, "lang": null, "name": "ogs:OperatingLeasesFutureMinimumPaymentsDueunderASC840", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R6": { "firstAnchor": null, "groupType": "statement", "isDefault": "false", "longName": "1004001 - Statement - BALANCE SHEETS BALANCE SHEETS Parenthetical", "role": "http://www.onegas.com/role/BalanceSheetsBalanceSheetsParenthetical", "shortName": "BALANCE SHEETS BALANCE SHEETS Parenthetical", "subGroupType": "parenthetical", "uniqueAnchor": null }, "R7": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:NetIncomeLoss", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1005000 - Statement - STATEMENTS OF CASH FLOWS", "role": "http://www.onegas.com/role/StatementsOfCashFlows", "shortName": "STATEMENTS OF CASH FLOWS", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": "-3", "lang": null, "name": "us-gaap:ProvisionForDoubtfulAccounts", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R8": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2017Q4YTD", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1006000 - Statement - STATEMENT OF CHANGES IN EQUITY", "role": "http://www.onegas.com/role/StatementOfChangesInEquity", "shortName": "STATEMENT OF CHANGES IN EQUITY", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2017Q4YTD", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R9": { "firstAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SignificantAccountingPoliciesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2101100 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Notes)", "role": "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesNotes", "shortName": "SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Notes)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "td", "tr", "table", "div", "body", "html" ], "baseRef": "onegas10-k2019.htm", "contextRef": "FD2019Q4YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SignificantAccountingPoliciesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } } }, "segmentCount": 60, "tag": { "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "gMonthDayItemType" }, "dei_DocumentAnnualReport": { "auth_ref": [ "r400" ], "lang": { "en-US": { "role": { "documentation": "Boolean flag that is true only for a form used as an annual report.", "label": "Document Annual Report", "terseLabel": "Document Annual Report" } } }, "localname": "DocumentAnnualReport", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_DocumentDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Type of the document as assigned by the filer, corresponding to SEC document naming convention standards.", "label": "Document [Domain]", "terseLabel": "Document [Domain]" } } }, "localname": "DocumentDomain", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "domainItemType" }, "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "fiscalPeriodItemType" }, "dei_DocumentFiscalYearFocus": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "This is focus fiscal year of the document report in CCYY 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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "gYearItemType" }, "dei_DocumentInformationDocumentAxis": { "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": "Document Information, Document [Axis]", "terseLabel": "Document Information, Document [Axis]" } } }, "localname": "DocumentInformationDocumentAxis", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "stringItemType" }, "dei_DocumentInformationLineItems": { "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": "Document Information [Line Items]", "terseLabel": "Document Information [Line Items]" } } }, "localname": "DocumentInformationLineItems", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "stringItemType" }, "dei_DocumentInformationTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Container to support the formal attachment of each official or unofficial, public or private document as part of a submission package.", "label": "Document Information [Table]", "terseLabel": "Document Information [Table]" } } }, "localname": "DocumentInformationTable", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "stringItemType" }, "dei_DocumentPeriodEndDate": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.", "label": "Document Period End Date", "terseLabel": "Document Period End Date" } } }, "localname": "DocumentPeriodEndDate", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "dateItemType" }, "dei_DocumentTransitionReport": { "auth_ref": [ "r399" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "submissionTypeItemType" }, "dei_DocumentsIncorporatedByReferenceTextBlock": { "auth_ref": [ "r397" ], "lang": { "en-US": { "role": { "documentation": "Documents incorporated by reference.", "label": "Documents Incorporated by Reference [Text Block]", "terseLabel": "Documents Incorporated by Reference [Text Block]" } } }, "localname": "DocumentsIncorporatedByReferenceTextBlock", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "textBlockItemType" }, "dei_EntitiesTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Container to assemble all relevant information about each entity associated with the document instance", "label": "Entities [Table]", "terseLabel": "Entities [Table]" } } }, "localname": "EntitiesTable", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentNotes", "http://www.onegas.com/role/PropertyPlantAndEquipmentTables" ], "xbrltype": "stringItemType" }, "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "stateOrProvinceItemType" }, "dei_EntityCentralIndexKey": { "auth_ref": [ "r401" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_EntityEmergingGrowthCompany": { "auth_ref": [ "r401" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "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": "Entity File Number", "terseLabel": "Entity File Number" } } }, "localname": "EntityFileNumber", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "fileNumberItemType" }, "dei_EntityFilerCategory": { "auth_ref": [ "r401" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "edgarStateCountryItemType" }, "dei_EntityInformationLineItems": { "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": "Entity Information [Line Items]", "terseLabel": "Property, Plant and Equipment [Line Items]" } } }, "localname": "EntityInformationLineItems", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentNotes", "http://www.onegas.com/role/PropertyPlantAndEquipmentTables" ], "xbrltype": "stringItemType" }, "dei_EntityInteractiveDataCurrent": { "auth_ref": [ "r402" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_EntityPublicFloat": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant's most recently completed second fiscal quarter.", "label": "Entity Public Float", "terseLabel": "Entity Public Float" } } }, "localname": "EntityPublicFloat", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "monetaryItemType" }, "dei_EntityRegistrantName": { "auth_ref": [ "r401" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityShellCompany": { "auth_ref": [ "r401" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_EntitySmallBusiness": { "auth_ref": [ "r401" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_EntityTaxIdentificationNumber": { "auth_ref": [ "r401" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "employerIdItemType" }, "dei_EntityVoluntaryFilers": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Indicate 'Yes' or 'No' if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.", "label": "Entity Voluntary Filers", "terseLabel": "Entity Voluntary Filers" } } }, "localname": "EntityVoluntaryFilers", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_EntityWellKnownSeasonedIssuer": { "auth_ref": [], "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", "terseLabel": "Entity Well-known Seasoned Issuer" } } }, "localname": "EntityWellKnownSeasonedIssuer", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_Security12bTitle": { "auth_ref": [ "r396" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "securityTitleItemType" }, "dei_SecurityExchangeName": { "auth_ref": [ "r398" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DocumentAndEntityInformation" ], "xbrltype": "tradingSymbolItemType" }, "ogs_ACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) [Abstract]", "label": "ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) [Abstract]" } } }, "localname": "ACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSAbstract", "nsuri": "http://www.onegas.com/20191231", "xbrltype": "stringItemType" }, "ogs_Actuarialnetlossexpectedtoberecognizedinthefollowingfiscalyear": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of actuarial net loss recognized in either accumulated comprehensive income (loss) or regulatory assets expected to be recognized as components of net periodic benefit expense in the next fiscal year.", "label": "Actuarial net loss expected to be recognized in the following fiscal year", "terseLabel": "Actuarial net loss, to be recognized in 2017" } } }, "localname": "Actuarialnetlossexpectedtoberecognizedinthefollowingfiscalyear", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "ogs_AdvaloremtaxMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Ad valorem tax represents an increase in Kansas Gas Service\u2019s taxes above the amount approved in a rate case. Kansas law permits a utility to file a tariff to recover additional ad valorem tax expense incurred above the amount currently recovered in the cost of service rate. This excess amount is recoverable through a surcharge and can be recovered, provided the utility reports the change in rates to the KCC, on an annual basis.", "label": "Ad valorem tax [Member]", "terseLabel": "Ad valorem tax [Member]" } } }, "localname": "AdvaloremtaxMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "ogs_AlternativeinvestmentsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Alternative investments [Member]", "label": "Alternative investments [Member]", "terseLabel": "Alternative investments [Member]" } } }, "localname": "AlternativeinvestmentsMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ogs_AmortizationofEDITregulatoryliability": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amortization of EDIT regulatory liability", "label": "Amortization of EDIT regulatory liability", "terseLabel": "Amortization of EDIT regulatory liability" } } }, "localname": "AmortizationofEDITregulatoryliability", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_ApprovedDebtCapitalRatio": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Percentage of public utility's approved debt to capital, including debt and equity.", "label": "Approved Debt Capital Ratio", "terseLabel": "Approved Debt Capital Ratio" } } }, "localname": "ApprovedDebtCapitalRatio", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "pureItemType" }, "ogs_AverageDepreciationRatesMaximum": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The maximum average depreciation percentage rate of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.", "label": "Average depreciation rates, maximum", "terseLabel": "Average depreciation rates, maximum" } } }, "localname": "AverageDepreciationRatesMaximum", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails" ], "xbrltype": "percentItemType" }, "ogs_AverageDepreciationRatesMinimum": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The minimum average depreciation percentage rate of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.", "label": "Average depreciation rates, minimum", "terseLabel": "Average depreciation rates, minimum" } } }, "localname": "AverageDepreciationRatesMinimum", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails" ], "xbrltype": "percentItemType" }, "ogs_AveragesharesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Average shares used in the EPS calculation.", "label": "Average shares [Abstract]", "terseLabel": "Average shares (thousands)" } } }, "localname": "AveragesharesAbstract", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "stringItemType" }, "ogs_CREDITFACILITYANDSHORTTERMNOTESPAYABLEAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "CREDIT FACILITY AND SHORT-TERM NOTES PAYABLE [Abstract]", "label": "CREDIT FACILITY AND SHORT-TERM NOTES PAYABLE [Abstract]" } } }, "localname": "CREDITFACILITYANDSHORTTERMNOTESPAYABLEAbstract", "nsuri": "http://www.onegas.com/20191231", "xbrltype": "stringItemType" }, "ogs_CashandMoneyMarketFundsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Cash and Money Market Funds [Member]", "label": "Cash and Money Market Funds [Member]", "terseLabel": "Cash and Money Market Funds [Member]" } } }, "localname": "CashandMoneyMarketFundsMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ogs_ChangeinKGStaxreformregulatoryliability": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Change in KGS tax reform regulatory liability", "label": "Change in KGS tax reform regulatory liability", "terseLabel": "Change in KGS tax reform regulatory liability" } } }, "localname": "ChangeinKGStaxreformregulatoryliability", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_Commercialpapermaximumborrowingcapacity": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Maximum borrowing capacity under the commercial paper program.", "label": "Commercial paper maximum borrowing capacity", "terseLabel": "Commercial paper maximum borrowing capacity" } } }, "localname": "Commercialpapermaximumborrowingcapacity", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "monetaryItemType" }, "ogs_CommitmentsandContingenciesLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Line Items] for Disclosure of commitments and contingencies [Table]", "label": "Commitments and Contingencies [Line Items]", "terseLabel": "Commitments and Contingencies [Line Items]" } } }, "localname": "CommitmentsandContingenciesLineItems", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesDetails", "http://www.onegas.com/role/CommitmentsAndContingenciesNotes" ], "xbrltype": "stringItemType" }, "ogs_CommitmentsandContingenciesTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Disclosure of commitments and contingencies [Table]", "label": "Commitments and Contingencies [Table]", "terseLabel": "Commitments and Contingencies [Table]" } } }, "localname": "CommitmentsandContingenciesTable", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesDetails", "http://www.onegas.com/role/CommitmentsAndContingenciesNotes" ], "xbrltype": "stringItemType" }, "ogs_CommonStockDividendsDeclaredAnnualizedBasis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Dividends declared during the period for each share of common stock outstanding, on an annualized basis.", "label": "Common Stock, Dividends, Declared, Annualized Basis", "terseLabel": "Common Stock, Dividends, Declared, Annualized Basis" } } }, "localname": "CommonStockDividendsDeclaredAnnualizedBasis", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EquityDetails", "http://www.onegas.com/role/StatementOfChangesInEquity" ], "xbrltype": "perShareItemType" }, "ogs_Commonstockauthorizedandavailableforissuance": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The remaining shares of common stock authorized and available for issuance at the end of the current period.", "label": "Common stock authorized and available for issuance", "terseLabel": "Common stock authorized and available for issuance" } } }, "localname": "Commonstockauthorizedandavailableforissuance", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EquityDetails" ], "xbrltype": "sharesItemType" }, "ogs_Contributionsmadeto401kplan": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Contributions made to 401(k) plan", "label": "Contributions made to 401(k) plan", "terseLabel": "Contributions made to 401(k) plan" } } }, "localname": "Contributionsmadeto401kplan", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "ogs_Contributionsmadetoprofitsharingplan": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Contributions made to profit-sharing plan", "label": "Contributions made to profit-sharing plan", "terseLabel": "Contributions made to profit-sharing plan" } } }, "localname": "Contributionsmadetoprofitsharingplan", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "ogs_CorporateObligationsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Corporate Obligations [Member]", "label": "Corporate Obligations [Member]", "terseLabel": "Corporate Obligations [Member]" } } }, "localname": "CorporateObligationsMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ogs_Corporatebondsinotherassets": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Corporate bonds in other current and noncurrent assets", "label": "Corporate bonds in other assets", "terseLabel": "Corporate bonds in other assets" } } }, "localname": "Corporatebondsinotherassets", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails" ], "xbrltype": "monetaryItemType" }, "ogs_DERIVATIVEFINANCIALINSTRUMENTSANDFAIRVALUEMEASUREMENTSAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "DERIVATIVE FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS [Abstract]", "label": "DERIVATIVE FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS [Abstract]" } } }, "localname": "DERIVATIVEFINANCIALINSTRUMENTSANDFAIRVALUEMEASUREMENTSAbstract", "nsuri": "http://www.onegas.com/20191231", "xbrltype": "stringItemType" }, "ogs_DebtInstrumentCovenantComplianceDefaultProvisionDebtHolders": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Debt Instrument, Covenant Compliance, Default Provision - Threshold of percentage held, of the aggregate principal amount of outstanding Senior Notes, to declare acceleration of repayment upon an event of default.", "label": "Debt Instrument, Covenant Compliance, Default Provision, Debt Holders", "terseLabel": "Debt Instrument, Covenant Compliance, Default Provision, Debt Holders" } } }, "localname": "DebtInstrumentCovenantComplianceDefaultProvisionDebtHolders", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails" ], "xbrltype": "pureItemType" }, "ogs_DebtInstrumentCovenantComplianceDefaultProvisionIndebtnednessThreshold": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Indebtedness threshold considered an event of default as stipulated in our Senior Note indenture.", "label": "Debt Instrument, Covenant Compliance, Default Provision, Indebtnedness Threshold", "terseLabel": "Debt Instrument, Covenant Compliance, Default Provision, Indebtnedness Threshold" } } }, "localname": "DebtInstrumentCovenantComplianceDefaultProvisionIndebtnednessThreshold", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails" ], "xbrltype": "monetaryItemType" }, "ogs_Decreaseinnetdeferredtaxliabilityduetoenactedtaxratechanges": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Decrease in net deferred tax liability due to enacted tax rate changes", "label": "Decrease in net deferred tax liability due to enacted tax rate changes", "terseLabel": "Decrease in net deferred tax liability due to enacted tax rate changes" } } }, "localname": "Decreaseinnetdeferredtaxliabilityduetoenactedtaxratechanges", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_DeferredMGPCostsMaximum": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The maximum amount of MGP costs (costs necessary for investigation and remediation at our 12 former MGP sites), incurred after January 1, 2017, that KGS has the KCC\u2019s approval to defer and seek recovery of.", "label": "Deferred MGP Costs, Maximum", "terseLabel": "Deferred MGP Costs, Maximum" } } }, "localname": "DeferredMGPCostsMaximum", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_DeferredTaxAssetsLeasingArrangements": { "auth_ref": [], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": 4.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred tax asset attributable to taxable temporary differences from leasing arrangements.", "label": "Deferred Tax Assets, Leasing Arrangements", "terseLabel": "Deferred Tax Assets, Leasing Arrangements" } } }, "localname": "DeferredTaxAssetsLeasingArrangements", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_Deferredtaxassetemployeebenefitsandotheraccruedliabilities": { "auth_ref": [], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": 1.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Deferred tax asset, employee benefits and other accrued liabilities", "label": "Deferred tax asset, employee benefits and other accrued liabilities", "terseLabel": "Deferred tax assets, employee benefits and other accrued liabilities" } } }, "localname": "Deferredtaxassetemployeebenefitsandotheraccruedliabilities", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_Deferredtaxassetregulatoryadjustments": { "auth_ref": [], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": 2.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Effect on deferred tax assets due to regulatory adjustments for enacted tax rate changes.", "label": "Deferred tax asset, regulatory adjustments", "terseLabel": "Deferred tax asset, regulatory adjustments" } } }, "localname": "Deferredtaxassetregulatoryadjustments", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossBeforeRegulatoryAssetsAndTaxes": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of accumulated other comprehensive income (loss) before regulatory assets and taxes.", "label": "Defined Benefit Plan Accumulated Other Comprehensive Income Loss Before Regulatory Assets And Taxes", "terseLabel": "Accumulated other comprehensive loss before regulatory assets" } } }, "localname": "DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossBeforeRegulatoryAssetsAndTaxes", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "ogs_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMaximum": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Expected rate of compensation increases (for pay-related plans) used in calculating net periodic benefit cost, maximum.", "label": "Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Maximum", "terseLabel": "Compensation increase rate- maximum" } } }, "localname": "DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMaximum", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "percentItemType" }, "ogs_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMinimum": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Expected rate of compensation increases (for pay-related plans) used in calculating net periodic benefit cost, minimum.", "label": "Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Minimum", "terseLabel": "Compensation increase rate - minimum" } } }, "localname": "DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMinimum", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "percentItemType" }, "ogs_DefinedBenefitPlanAssumptionsUsedToDetermineBenefitObligationsRateofCompensationIncreaseMaximum": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Expected rate of compensation increase (for pay-related plans) used to determine benefit obligations, maximum", "label": "Defined Benefit Plan Assumptions Used To Determine Benefit Obligations Rate of Compensation Increase, Maximum", "terseLabel": "Defined Benefit Plan Assumptions Used To Determine Benefit Obligations Rate of Compensation Increase, Maximum" } } }, "localname": "DefinedBenefitPlanAssumptionsUsedToDetermineBenefitObligationsRateofCompensationIncreaseMaximum", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "percentItemType" }, "ogs_DefinedBenefitPlanAssumptionsUsedToDetermineBenefitObligationsRateofCompensationIncreaseMinimum": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Expected rate of compensation increase (for pay-related plans) used to determine benefit obligations, minimum", "label": "Defined Benefit Plan Assumptions Used To Determine Benefit Obligations Rate of Compensation Increase, Minimum", "terseLabel": "Defined Benefit Plan Assumptions Used To Determine Benefit Obligations Rate of Compensation Increase, Minimum" } } }, "localname": "DefinedBenefitPlanAssumptionsUsedToDetermineBenefitObligationsRateofCompensationIncreaseMinimum", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "percentItemType" }, "ogs_DevelopedforeignlargecapequitiesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Developed foreign large-cap equities [Member]", "label": "Developed foreign large-cap equities [Member]", "terseLabel": "Developed foreign large-cap equities [Member]" } } }, "localname": "DevelopedforeignlargecapequitiesMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ogs_DocumentAndEntityInformationAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "4eba46a2-97a9-0056-c25c-d1cfa3a911f6", "label": "Document and Entity Information [Abstract]" } } }, "localname": "DocumentAndEntityInformationAbstract", "nsuri": "http://www.onegas.com/20191231", "xbrltype": "stringItemType" }, "ogs_EARNINGSPERSHAREOFCOMMONSTOCKBASICANDDILUTEDLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Line Items] for 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": "EARNINGS PER SHARE OF COMMON STOCK, BASIC AND DILUTED [Line Items]", "terseLabel": "EARNINGS PER SHARE OF COMMON STOCK, BASIC AND DILUTED [Line Items]" } } }, "localname": "EARNINGSPERSHAREOFCOMMONSTOCKBASICANDDILUTEDLineItems", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EarningsPerShareDetails", "http://www.onegas.com/role/EarningsPerShareNotes", "http://www.onegas.com/role/EarningsPerShareTables" ], "xbrltype": "stringItemType" }, "ogs_EARNINGSPERSHAREOFCOMMONSTOCKBASICANDDILUTEDTable": { "auth_ref": [], "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": "EARNINGS PER SHARE OF COMMON STOCK, BASIC AND DILUTED [Table]", "terseLabel": "EARNINGS PER SHARE OF COMMON STOCK, BASIC AND DILUTED [Table]" } } }, "localname": "EARNINGSPERSHAREOFCOMMONSTOCKBASICANDDILUTEDTable", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EarningsPerShareDetails", "http://www.onegas.com/role/EarningsPerShareNotes", "http://www.onegas.com/role/EarningsPerShareTables" ], "xbrltype": "stringItemType" }, "ogs_EMPLOYEEBENEFITPLANSAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "EMPLOYEE BENEFIT PLANS [Abstract]", "label": "EMPLOYEE BENEFIT PLANS [Abstract]" } } }, "localname": "EMPLOYEEBENEFITPLANSAbstract", "nsuri": "http://www.onegas.com/20191231", "xbrltype": "stringItemType" }, "ogs_EffectiveIncomeTaxRateReconciliationnonregulateddeferredtaxratedecrease": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Effective Income Tax Rate Reconciliation, nonregulated deferred tax rate decrease, amount", "label": "Effective Income Tax Rate Reconciliation, nonregulated deferred tax rate decrease", "terseLabel": "Effective Income Tax Rate Reconciliation, nonregulated deferred tax rate decrease" } } }, "localname": "EffectiveIncomeTaxRateReconciliationnonregulateddeferredtaxratedecrease", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_EffectiveIncomeTaxRateReconciliationtaxbenefitofemployeesharebasedcompensation": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Effective Income Tax Rate Reconciliation, tax benefit of employee share based compensation, amount", "label": "Effective Income Tax Rate Reconciliation, tax benefit of employee share based compensation", "terseLabel": "Effective Income Tax Rate Reconciliation, tax benefit of employee share based compensation" } } }, "localname": "EffectiveIncomeTaxRateReconciliationtaxbenefitofemployeesharebasedcompensation", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_EmergingmarketequitiesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Emerging market equities [Member]", "label": "Emerging market equities [Member]", "terseLabel": "Emerging market equities [Member]" } } }, "localname": "EmergingmarketequitiesMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ogs_EmployeeStockPurchasePlanMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information on the Employee Stock Purchase Plan (ESPP).", "label": "Employee Stock Purchase Plan [Member]", "terseLabel": "Employee Stock Purchase Plan [Member]" } } }, "localname": "EmployeeStockPurchasePlanMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "domainItemType" }, "ogs_EnvironmentalReserveEstimateActual": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Increase in the reserve recorded for potential costs associated with environmental remediation.", "label": "Environmental Reserve Estimate, Actual", "terseLabel": "Environmental Reserve Estimate, Actual" } } }, "localname": "EnvironmentalReserveEstimateActual", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_EnvironmentalReserveEstimateRangeHigh": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Potential costs associated with environmental remediation, high-end range.", "label": "Environmental Reserve Estimate Range, High", "terseLabel": "Environmental Reserve Estimate Range, High" } } }, "localname": "EnvironmentalReserveEstimateRangeHigh", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_EnvironmentalReserveEstimateRangeLow": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Potential costs associated with environmental remediation, low-end range.", "label": "Environmental Reserve Estimate Range, Low", "terseLabel": "Environmental Reserve Estimate Range, Low" } } }, "localname": "EnvironmentalReserveEstimateRangeLow", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_EstimatedRecoveryPeriod": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The estimated amortization period for recovery of the individual regulatory asset/liability in a schedule of regulatory assets/liabilities.", "label": "Estimated Recovery Period", "terseLabel": "Regulatory Asset, Amortization Period" } } }, "localname": "EstimatedRecoveryPeriod", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "stringItemType" }, "ogs_FairValueAssetsTransfersbetweenLevels": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of transfers of assets measured on a recurring basis between levels of the fair value hierarchy.", "label": "Fair Value Assets, Transfers between Levels", "terseLabel": "Fair Value Assets, Transfers between Levels" } } }, "localname": "FairValueAssetsTransfersbetweenLevels", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails" ], "xbrltype": "monetaryItemType" }, "ogs_Fairvalueofnaturalgascalloptionsheld": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The fair value of natural gas call options held, which are recorded in other currents assets.", "label": "Fair value of natural gas call options held", "terseLabel": "Fair value of natural gas call options held" } } }, "localname": "Fairvalueofnaturalgascalloptionsheld", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails" ], "xbrltype": "monetaryItemType" }, "ogs_FederalincometaxratechangesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Deferred income taxes deferred as a regulatory liability due to the enacted decrease in the Federal income tax rate.", "label": "Federal income tax rate changes [Member]", "terseLabel": "Federal income tax rate changes [Member]" } } }, "localname": "FederalincometaxratechangesMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "ogs_ForfeitureRateMaximumInHundredths": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Maximum percentage estimated forfeiture rate, based on historical forfeitures, applied for all awards outstanding based on historical forfeitures under share-based payment plans.", "label": "Forfeiture rate maximum (in hundredths)", "terseLabel": "Forfeiture rate maximum (in hundredths)" } } }, "localname": "ForfeitureRateMaximumInHundredths", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "percentItemType" }, "ogs_GovernmentObligationsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Government Obligations [Member]", "label": "Government Obligations [Member]", "terseLabel": "Government Obligations [Member]" } } }, "localname": "GovernmentObligationsMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ogs_ImpactofreclassificationuponadoptionofASU201707": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The increase in operating income and increase in other expenses as a result of the reclassification of the other components of benefits costs upon adoption of ASU 2017-07, \u201cCompensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.\u201d", "label": "Impact of reclassification upon adoption of ASU 2017-07", "terseLabel": "Impact of reclassification upon adoption of ASU 2017-07" } } }, "localname": "ImpactofreclassificationuponadoptionofASU201707", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_IncomeTaxLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Line Items] for Income tax [Table]", "label": "Income tax [Line Items]", "terseLabel": "Income tax [Line Items]" } } }, "localname": "IncomeTaxLineItems", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/IncomeTaxesNotes", "http://www.onegas.com/role/IncomeTaxesTables" ], "xbrltype": "stringItemType" }, "ogs_IncomeTaxTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Income tax [Table]", "label": "Income tax [Table]", "terseLabel": "Income tax [Table]" } } }, "localname": "IncomeTaxTable", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/IncomeTaxesNotes", "http://www.onegas.com/role/IncomeTaxesTables" ], "xbrltype": "stringItemType" }, "ogs_InsurancecontractsandgroupannuitycontractsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Insurance contracts and group annuity contracts [Member]", "label": "Insurance contracts and group annuity contracts [Member]", "terseLabel": "Insurance contracts and group annuity contracts [Member]" } } }, "localname": "InsurancecontractsandgroupannuitycontractsMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ogs_InvestmentgradebondsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Investment-grade bonds [Member]", "label": "Investment-grade bonds [Member]", "terseLabel": "Investment-grade bonds [Member]" } } }, "localname": "InvestmentgradebondsMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ogs_InvestmentsAndOtherAssetsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "e5171b7a-202d-b2ed-e1e6-d1c8d50b4c9b", "label": "Investments and other assets [Abstract]", "verboseLabel": "Goodwill and other assets" } } }, "localname": "InvestmentsAndOtherAssetsAbstract", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "stringItemType" }, "ogs_KansasGasServicetaxreformregulatoryliability": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Kansas Gas Service tax reform regulatory liability", "label": "Kansas Gas Service tax reform regulatory liability", "terseLabel": "Kansas Gas Service tax reform regulatory liability" } } }, "localname": "KansasGasServicetaxreformregulatoryliability", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_LineofCreditFacilityOptiontoIncreaseBorrowingCapacity": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "This item represents the total amount the facility my increase to.", "label": "Line of Credit Facility Option to Increase Borrowing Capacity", "terseLabel": "Line of Credit Facility Option to Increase Borrowing Capacity" } } }, "localname": "LineofCreditFacilityOptiontoIncreaseBorrowingCapacity", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "monetaryItemType" }, "ogs_LineofCreditFacilitySublimit": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "This item represents the amount of sublimit for the issuance of standby letters of credit.", "label": "Line of Credit Facility Sublimit", "terseLabel": "Line of Credit Facility Sublimit" } } }, "localname": "LineofCreditFacilitySublimit", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "monetaryItemType" }, "ogs_MGPCostsMemberMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Estimate of manufactured gas plant (MGP) costs expected to be incurred that have been recorded as a regulatory asset.", "label": "MGP Costs [Member] [Member]", "terseLabel": "MGP Costs [Member]" } } }, "localname": "MGPCostsMemberMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "ogs_MaximumAllowablePercentageOfAnnualBasePayWithheldToPurchaseOurCommonStock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Employees can choose to have up to 10 percent of their annual base pay withheld to purchase our common stock, subject to terms and limitations of the plan.", "label": "Maximum allowable percentage of annual base pay withheld to purchase our common stock", "terseLabel": "Maximum allowable percentage of annual base pay withheld to purchase common stock" } } }, "localname": "MaximumAllowablePercentageOfAnnualBasePayWithheldToPurchaseOurCommonStock", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "percentItemType" }, "ogs_Maximumpercentageofeachparticipantseligiblecompensationsubjecttocertainlimitsmatchinginhundredths": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Maximum percentage of each participant's eligible compensation, subject to certain limits, matching by the company.", "label": "Maximum percentage of each participants eligible compensation subject to certain limits matching (in hundredths)", "terseLabel": "Maximum percentage of each participants eligible compensation subject to certain limits matching (in hundredths)" } } }, "localname": "Maximumpercentageofeachparticipantseligiblecompensationsubjecttocertainlimitsmatchinginhundredths", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "percentItemType" }, "ogs_MidcapequitiesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Mid-cap equities [Member]", "label": "Mid-cap equities [Member]", "terseLabel": "Mid-cap equities [Member]" } } }, "localname": "MidcapequitiesMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ogs_Minimumnumberofyearsofserviceforcertainemployeestobeeligibletoparticipateinsharedwelfareplansthatprovidepostretirementmedicalandlifeinsurancebenefits": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The minimum number of years of service for certain employees to be eligible to participate in shared welfare plans that provide postretirement medical and life insurance benefits.", "label": "Minimum number of years of service for certain employees to be eligible to participate in shared welfare plans that provide postretirement medical and life insurance benefits", "terseLabel": "Minimum number of years of service for certain employees to be eligible to participate in shared welfare plans that provide postemployment medical and life insurance benefits" } } }, "localname": "Minimumnumberofyearsofserviceforcertainemployeestobeeligibletoparticipateinsharedwelfareplansthatprovidepostretirementmedicalandlifeinsurancebenefits", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "stringItemType" }, "ogs_MiscellaneousrevenuesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Miscellaneous revenues from contracts with customers represent implied contracts established by our tariff rates approved by the regulatory authorities and includes one-time miscellaneous service charges with the performance obligation satisfied at a point in time when services are rendered to the customer.", "label": "Miscellaneous revenues [Member]", "terseLabel": "Miscellaneous revenues [Member]" } } }, "localname": "MiscellaneousrevenuesMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RevenueDetails" ], "xbrltype": "domainItemType" }, "ogs_NaturalgassalestocustomersMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Natural gas sales to customers represent revenue from contracts with customers through implied contracts established by our tariff rates approved by the regulatory authorities and includes residential, commercial, industrial, wholesale and public authority customers. For natural gas sales, the customer receives the benefits of our performance when the commodity is received and simultaneously consumed by the customer. The performance obligation is satisfied over time as the customer consumes the natural gas.", "label": "Natural gas sales to customers [Member]", "terseLabel": "Natural gas sales to customers [Member]" } } }, "localname": "NaturalgassalestocustomersMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RevenueDetails" ], "xbrltype": "domainItemType" }, "ogs_Netregulatoryassetsandliabilitiescurrent": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The net amount of all current regulatory assets less all current regulatory liabilities as of the end of the period.", "label": "Net regulatory assets and liabilities, current", "terseLabel": "Net regulatory assets and liabilities, current" } } }, "localname": "Netregulatoryassetsandliabilitiescurrent", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_Netregulatoryassetsandliabilitiesnoncurrent": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The net amount of noncurrent regulatory assets less all noncurrent regulatory liabilities as of the end of the period.", "label": "Net regulatory assets and liabilities, noncurrent", "terseLabel": "Net regulatory assets and liabilities, noncurrent" } } }, "localname": "Netregulatoryassetsandliabilitiesnoncurrent", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_NonserviceCostsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Regulatory Assets: Non-service Costs", "label": "Non-service Costs [Member]", "terseLabel": "Non-service Costs [Member]" } } }, "localname": "NonserviceCostsMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ogs_NotePayableDue2019Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Note Payable Due 2019 [Member]", "label": "Note Payable Due 2019 [Member]", "terseLabel": "Note Payable Due 2019 [Member]" } } }, "localname": "NotePayableDue2019Member", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails" ], "xbrltype": "domainItemType" }, "ogs_NotePayableDue2024Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Note Payable Due 2024 [Member]", "label": "Note Payable Due 2024 [Member]", "terseLabel": "Note Payable Due 2024 [Member]" } } }, "localname": "NotePayableDue2024Member", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails" ], "xbrltype": "domainItemType" }, "ogs_NotePayableDue2048Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Note Payable Due 2048", "label": "Note Payable Due 2048 [Member]", "terseLabel": "Note Payable Due 2048 [Member]" } } }, "localname": "NotePayableDue2048Member", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails" ], "xbrltype": "domainItemType" }, "ogs_NotesPayableDue2044Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "A written promise to pay a note.", "label": "Notes Payable Due 2044 [Member]", "terseLabel": "Notes Payable Due 2044 [Member]" } } }, "localname": "NotesPayableDue2044Member", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails" ], "xbrltype": "domainItemType" }, "ogs_NumberOfFormerManufacturedGasSitesWhereWeOwnOrRetainLegalResponsibilityForEnvironmentalConditions": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Number of former manufactured gas sites where we own or retain legal responsibility.", "label": "Number Of Former Manufactured Gas Sites Where We Own Or Retain Legal Responsibility For Environmental Conditions", "terseLabel": "Number Of Former Manufactured Gas Sites Where We Own Or Retain Legal Responsibility For Environmental Conditions" } } }, "localname": "NumberOfFormerManufacturedGasSitesWhereWeOwnOrRetainLegalResponsibilityForEnvironmentalConditions", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "integerItemType" }, "ogs_NumberOfNaturalGasDistributionServicesCustomers": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Number of customers the natural gas distribution service segment services.", "label": "Number of natural gas distribution services customers", "terseLabel": "Number of natural gas distribution services customers" } } }, "localname": "NumberOfNaturalGasDistributionServicesCustomers", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "integerItemType" }, "ogs_NumberOfSitesSoilRemediationIsCompletedOrNearCompletion": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Number of sites soil remediation is completed or near completion.", "label": "Number Of Sites Soil Remediation Is Completed Or Near Completion", "terseLabel": "Number Of Sites Soil Remediation Is Completed Or Near Completion" } } }, "localname": "NumberOfSitesSoilRemediationIsCompletedOrNearCompletion", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "integerItemType" }, "ogs_NumberofMGPsitesforwhicharemediationreservewasrecorded": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Number of MGP sites for which a remediation reserve was recorded", "label": "Number of MGP sites for which a remediation reserve was recorded", "terseLabel": "Number of MGP sites for which a remediation reserve was recorded" } } }, "localname": "NumberofMGPsitesforwhicharemediationreservewasrecorded", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "integerItemType" }, "ogs_Numberofsiteswithongoinggroundwatermonitoring": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Number of sites where groundwater continues to be monitored in accordance to plans approved by the KDHE.", "label": "Number of sites with ongoing groundwater monitoring", "terseLabel": "Number of sites with ongoing groundwater monitoring" } } }, "localname": "Numberofsiteswithongoinggroundwatermonitoring", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "integerItemType" }, "ogs_ONEGas401kPlanMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "ONE Gas 401(k) Plan [Member]", "label": "ONE Gas 401(k) Plan [Member]", "terseLabel": "ONE Gas 401(k) Plan [Member]" } } }, "localname": "ONEGas401kPlanMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ogs_ONEGasProfitSharingPlanMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "ONE Gas Profit-Sharing Plan [Member]", "label": "ONE Gas Profit-Sharing Plan [Member]", "terseLabel": "ONE Gas Profit-Sharing Plan [Member]" } } }, "localname": "ONEGasProfitSharingPlanMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ogs_OklahomaNaturalGastaxreformregulatoryliability": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Oklahoma Natural Gas tax reform regulatory liability", "label": "Oklahoma Natural Gas tax reform regulatory liability", "terseLabel": "Oklahoma Natural Gas tax reform regulatory liability" } } }, "localname": "OklahomaNaturalGastaxreformregulatoryliability", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_OklahomaNaturalGastaxreformregulatoryliabilityasadjusted": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Oklahoma Natural Gas tax reform regulatory liability as adjusted", "label": "Oklahoma Natural Gas tax reform regulatory liability as adjusted", "terseLabel": "Oklahoma Natural Gas tax reform regulatory liability as adjusted" } } }, "localname": "OklahomaNaturalGastaxreformregulatoryliabilityasadjusted", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_OperatingLeasesFutureMinimumPaymentsDueunderASC840": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Operating Leases, Future Minimum Payments Due under ASC 840", "label": "Operating Leases, Future Minimum Payments Due under ASC 840", "terseLabel": "Operating Leases, Future Minimum Payments Due under ASC 840" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueunderASC840", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_OtherEmployeeBenefitPlansAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Other Employee Benefit Plans [Axis]", "label": "Other Employee Benefit Plans [Axis]", "terseLabel": "Other Employee Benefit Plans [Axis]" } } }, "localname": "OtherEmployeeBenefitPlansAxis", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "stringItemType" }, "ogs_OtherEmployeeBenefitPlansDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Domain] for Other Employee Benefit Plans [Axis]", "label": "Other Employee Benefit Plans [Domain]", "terseLabel": "Other Employee Benefit Plans [Domain]" } } }, "localname": "OtherEmployeeBenefitPlansDomain", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ogs_OtherInformationRelatedtoOperatingLeasesTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Table Text Block] for Other Information Related to Operating Leases [Table]", "label": "Other Information Related to Operating Leases [Table Text Block]", "terseLabel": "Other Information Related to Operating Leases [Table Text Block]" } } }, "localname": "OtherInformationRelatedtoOperatingLeasesTableTextBlock", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/LeasesTables" ], "xbrltype": "textBlockItemType" }, "ogs_OthercomprehensiveincomelossreclassificationRegulatoryadjustments": { "auth_ref": [], "calculation": { "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails": { "order": 2.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Other comprehensive income (loss) reclassification - Regulatory adjustments represent pension and other postretirement benefit costs expected to be recovered through rates and are deferred as part of our regulatory assets.", "label": "Other comprehensive income (loss) reclassification - Regulatory adjustments", "negatedTerseLabel": "Other comprehensive income (loss) reclassification - regulatory adjustments" } } }, "localname": "OthercomprehensiveincomelossreclassificationRegulatoryadjustments", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "ogs_Othercomprehensiveincomelossreclassificationadjustmentbeforetaxandregulatoryadjustments": { "auth_ref": [], "calculation": { "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails": { "order": 1.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Other comprehensive income (loss) reclassification adjustment, before tax and regulatory adjustments", "label": "Other comprehensive income (loss) reclassification adjustment, before tax and regulatory adjustments", "negatedTotalLabel": "Other comprehensive income (loss) reclassification adjustment, before tax and regulatory adjustments" } } }, "localname": "Othercomprehensiveincomelossreclassificationadjustmentbeforetaxandregulatoryadjustments", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "ogs_OtherregulatoryassetsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Represents other regulatory assets.", "label": "Other regulatory assets [Member]", "terseLabel": "Other regulatory assets [Member]" } } }, "localname": "OtherregulatoryassetsMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "ogs_OtherrevenuesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Other revenues [Member]", "label": "Other revenues [Member]", "terseLabel": "Other revenues [Member]" } } }, "localname": "OtherrevenuesMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RevenueDetails" ], "xbrltype": "domainItemType" }, "ogs_Otherrevenuesnaturalgassalesrelated": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Miscellaneous revenues from contracts with customers from implied contracts established by our tariff rates approved by the regulatory authorities and includes miscellaneous service charges with the performance obligation satisfied at a point in time when services are rendered to the customer", "label": "Other revenues - natural gas sales related", "terseLabel": "Other revenues - natural gas sales related" } } }, "localname": "Otherrevenuesnaturalgassalesrelated", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RevenueDetails" ], "xbrltype": "monetaryItemType" }, "ogs_OtherrevenuesnaturalgassalesrelatedMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Other revenues - natural gas sales related [Member]", "label": "Other revenues - natural gas sales related [Member]", "terseLabel": "Other revenues - natural gas sales related [Member]" } } }, "localname": "OtherrevenuesnaturalgassalesrelatedMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RevenueDetails" ], "xbrltype": "domainItemType" }, "ogs_OverrecoveredpurchasedgascostsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Represents the amount of over-recovered purchased-gas costs.", "label": "Over-recovered purchased-gas costs [Member]", "terseLabel": "Over-recovered purchased-gas costs [Member]" } } }, "localname": "OverrecoveredpurchasedgascostsMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "ogs_PercentOfEmployeeContributionsMatchedOfEligibleCompensationInHundredths": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Percent of employee contributions matched of eligible compensation. The company will match 100 percent of the employees contribution to the plan, up to a maximum of 6 percent of the employees contribution.", "label": "Percent of employee contributions matched of eligible compensation (in hundredths)", "terseLabel": "Percent of employee contributions matched of eligible compensation (in hundredths)" } } }, "localname": "PercentOfEmployeeContributionsMatchedOfEligibleCompensationInHundredths", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "percentItemType" }, "ogs_Percentageyieldofhighconsequencepipelineareas": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Minimum percentage yield required to test pipelines previously untested in high-consequence areas.", "label": "PercentageYieldOfHighConsequencePipelineAreas", "terseLabel": "Percentage yield of high consequence pipeline areas" } } }, "localname": "Percentageyieldofhighconsequencepipelineareas", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "percentItemType" }, "ogs_PercentofemployeeswhoparticipatedintheEmployeeStockPurchasePlan": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Approximate percentage of employees who participated in the Employee Stock Purchase Plan", "label": "Percent of employees who participated in the Employee Stock Purchase Plan", "terseLabel": "Percent of employees who participated in the Employee Stock Purchase Plan" } } }, "localname": "PercentofemployeeswhoparticipatedintheEmployeeStockPurchasePlan", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "percentItemType" }, "ogs_Premiumsrecordedinothercurrentassetsonnaturalgascontractsheld": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of premiums recorded in other current assets on natural gas contracts held", "label": "Premiums recorded in other current assets on natural gas contracts held", "terseLabel": "Premiums recorded in other current assets on natural gas contracts held" } } }, "localname": "Premiumsrecordedinothercurrentassetsonnaturalgascontractsheld", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails" ], "xbrltype": "monetaryItemType" }, "ogs_Priorservicecreditcostexpectedtoberecognizedinfollowingfiscalyear": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amounts of prior service credit (cost) recognized in either accumulated comprehensive income (loss) or regulatory assets expected to be recognized as components of net periodic benefit expense expected to be recognized in the following fiscal year.", "label": "Prior service credit (cost) expected to be recognized in following fiscal year", "terseLabel": "Prior service credit (cost) expected to be recognized in following fiscal year" } } }, "localname": "Priorservicecreditcostexpectedtoberecognizedinfollowingfiscalyear", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "ogs_ProfitSharingContributionPercentage": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Quarterly contribution percentage made to the profit-sharing plan of each participant's eligible compensation", "label": "Profit sharing contribution percentage", "terseLabel": "Profit sharing contribution percentage" } } }, "localname": "ProfitSharingContributionPercentage", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "percentItemType" }, "ogs_PurchasePricePercentageOfLowerOfItsGrantDateOrExerciseDateMarketPriceInHundredths": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The purchase price of the stock is 85 percent of the lower of its grant date or exercise date market price.", "label": "Purchase price percentage of the lower of its grant date or exercise date market price (in hundredths)", "terseLabel": "Purchase price percentage of the lower of its grant date or exercise date market price (in hundredths)" } } }, "localname": "PurchasePricePercentageOfLowerOfItsGrantDateOrExerciseDateMarketPriceInHundredths", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "percentItemType" }, "ogs_REVENUEAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "REVENUE [Abstract]", "label": "REVENUE [Abstract]" } } }, "localname": "REVENUEAbstract", "nsuri": "http://www.onegas.com/20191231", "xbrltype": "stringItemType" }, "ogs_REVENUEAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Revenues disaggregated by source.", "label": "REVENUE [Axis]", "terseLabel": "REVENUE [Axis]" } } }, "localname": "REVENUEAxis", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RevenueDetails" ], "xbrltype": "stringItemType" }, "ogs_REVENUEDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Domain] for Revenues disaggregated by source.", "label": "REVENUE [Domain]", "terseLabel": "REVENUE [Domain]" } } }, "localname": "REVENUEDomain", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RevenueDetails" ], "xbrltype": "domainItemType" }, "ogs_ReductioninincometaxexpensefortheamortizationoftheregulatoryliabilityassociatedwithexcessADITthatwasreturnedtocustomers": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Reduction in income tax expense for the amortization of the regulatory liability associated with excess ADIT that was returned to customers", "label": "Reduction in income tax expense for the amortization of the regulatory liability associated with excess ADIT that was returned to customers", "terseLabel": "Reduction in income tax expense for the amortization of the regulatory liability associated with excess ADIT that was returned to customers" } } }, "localname": "ReductioninincometaxexpensefortheamortizationoftheregulatoryliabilityassociatedwithexcessADITthatwasreturnedtocustomers", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_Reductiontorevenuesduetothechangeintaxratescollectedinourrates": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Reduction to revenues due to the change in tax rates collected in our rates as a result of the Tax Cuts and Jobs Act of 2017", "label": "Reduction to revenues due to the change in tax rates collected in our rates", "terseLabel": "Reduction to revenues due to the change in tax rates collected in our rates" } } }, "localname": "Reductiontorevenuesduetothechangeintaxratescollectedinourrates", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_RegulatoryAssetsandLiabilitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Regulatory Assets and Liabilities [Abstract]", "label": "Regulatory Assets and Liabilities [Abstract]" } } }, "localname": "RegulatoryAssetsandLiabilitiesAbstract", "nsuri": "http://www.onegas.com/20191231", "xbrltype": "stringItemType" }, "ogs_RegulatoryAssetsandLiabilitiesAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by type of regulatory asset/liabilities itemized in a table of regulatory assets/liabilities.", "label": "Regulatory Assets and Liabilities [Axis]", "terseLabel": "Regulatory Assets and Liabilities [Axis]" } } }, "localname": "RegulatoryAssetsandLiabilitiesAxis", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesTables" ], "xbrltype": "stringItemType" }, "ogs_RegulatoryAssetsandLiabilitiesDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Domain] for Information by type of regulatory asset/liabilities itemized in a table of regulatory assets/liabilities.", "label": "Regulatory Assets and Liabilities [Domain]", "terseLabel": "Regulatory Assets and Liabilities [Domain]" } } }, "localname": "RegulatoryAssetsandLiabilitiesDomain", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesTables" ], "xbrltype": "domainItemType" }, "ogs_SCHEDULEOFREGULATEDASSETSANDLIABILITIESLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Line Items] for Tabular disclosure of assets and liabilities that result from rate actions of a regulator. Regulatory assets are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability.", "label": "SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items]", "terseLabel": "SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items]" } } }, "localname": "SCHEDULEOFREGULATEDASSETSANDLIABILITIESLineItems", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesNotes", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesTables" ], "xbrltype": "stringItemType" }, "ogs_SCHEDULEOFREGULATEDASSETSANDLIABILITIESTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of assets and liabilities that result from rate actions of a regulator. Regulatory assets are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability.", "label": "SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Table]", "terseLabel": "SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Table]" } } }, "localname": "SCHEDULEOFREGULATEDASSETSANDLIABILITIESTable", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesNotes", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesTables" ], "xbrltype": "stringItemType" }, "ogs_SCHEDULEOFREGULATEDASSETSANDLIABILITIESTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Table Text Block] for Tabular disclosure of assets and liabilities that result from rate actions of a regulator. Regulatory assets are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability.", "label": "SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Table Text Block]", "terseLabel": "SCHEDULE OF REGULATED ASSETS AND LIABILITIES" } } }, "localname": "SCHEDULEOFREGULATEDASSETSANDLIABILITIESTableTextBlock", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesTables" ], "xbrltype": "textBlockItemType" }, "ogs_STATEMENTSOFCOMPREHENSIVEINCOMEAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "STATEMENTS OF COMPREHENSIVE INCOME [Abstract]", "label": "STATEMENTS OF COMPREHENSIVE INCOME [Abstract]" } } }, "localname": "STATEMENTSOFCOMPREHENSIVEINCOMEAbstract", "nsuri": "http://www.onegas.com/20191231", "xbrltype": "stringItemType" }, "ogs_ScheduleofFutureMinimumRentalPaymentsforOperatingLeasesUnderASC840TableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Schedule of Future Minimum Rental Payments for Operating Leases Under ASC 840 [Table Text Block]", "label": "Schedule of Future Minimum Rental Payments for Operating Leases Under ASC 840 [Table Text Block]", "terseLabel": "Schedule of Future Minimum Rental Payments for Operating Leases Under ASC 840 [Table Text Block]" } } }, "localname": "ScheduleofFutureMinimumRentalPaymentsforOperatingLeasesUnderASC840TableTextBlock", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/LeasesTables" ], "xbrltype": "textBlockItemType" }, "ogs_ScheduleofQuarterlyFinancialInformationLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Line Items] for Schedule of Quarterly Financial Information [Table]", "label": "Schedule of Quarterly Financial Information [Line Items]", "terseLabel": "Schedule of Quarterly Financial Information [Line Items]" } } }, "localname": "ScheduleofQuarterlyFinancialInformationLineItems", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedDetails", "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedNotes", "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedTables" ], "xbrltype": "stringItemType" }, "ogs_ScheduleofQuarterlyFinancialInformationTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Schedule of Quarterly Financial Information [Table]", "label": "Schedule of Quarterly Financial Information [Table]", "terseLabel": "Schedule of Quarterly Financial Information [Table]" } } }, "localname": "ScheduleofQuarterlyFinancialInformationTable", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedDetails", "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedNotes", "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedTables" ], "xbrltype": "stringItemType" }, "ogs_SegmentReportingDisclosureofMajorCustomer": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Segment Reporting, Disclosure of Major Customer", "label": "Segment Reporting, Disclosure of Major Customer", "terseLabel": "Segment Reporting, Disclosure of Major Customer" } } }, "localname": "SegmentReportingDisclosureofMajorCustomer", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "integerItemType" }, "ogs_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFairValueOfSharesGranted": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The estimated fair value of shares granted during the period.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Fair Value Of Shares Granted", "terseLabel": "Fair value of shares granted (thousands of dollars)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFairValueOfSharesGranted", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "monetaryItemType" }, "ogs_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFairValueOfSharesVested": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The estimated fair value of shares that vested during the period.", "label": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFairValueOfSharesVested", "terseLabel": "Fair value of vested shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFairValueOfSharesVested", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "monetaryItemType" }, "ogs_SharepriceofsharessoldunderEmployeeStockPurchasePlanindollarspershare": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Share price of shares sold under Employee Stock Purchase Plan in dollars per share", "label": "Share price of shares sold under Employee Stock Purchase Plan in dollars per share", "terseLabel": "Share price of shares sold under Employee Stock Purchase Plan in dollars per share" } } }, "localname": "SharepriceofsharessoldunderEmployeeStockPurchasePlanindollarspershare", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "perShareItemType" }, "ogs_Sharessoldunderemployeestockpurchaseplan": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Shares sold under employee stock purchase plan", "label": "Shares sold under employee stock purchase plan", "terseLabel": "Shares sold under employee stock purchase plan" } } }, "localname": "Sharessoldunderemployeestockpurchaseplan", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "sharesItemType" }, "ogs_SignificantAccountingPoliciesLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Line items for Significant accounting policies of the reporting entity.", "label": "Significant Accounting Policies [Line Items]", "terseLabel": "Significant Accounting Policies [Line Items]" } } }, "localname": "SignificantAccountingPoliciesLineItems", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesDetails", "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesNotes", "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "stringItemType" }, "ogs_SignificantAccountingPoliciesTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Significant accounting policies of the reporting entity.", "label": "Significant Accounting Policies [Table]", "terseLabel": "Significant Accounting Policies [Table]" } } }, "localname": "SignificantAccountingPoliciesTable", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesDetails", "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesNotes", "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "stringItemType" }, "ogs_SmallcapequitiesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Small-cap equities [Member]", "label": "Small-cap equities [Member]", "terseLabel": "Small-cap equities [Member]" } } }, "localname": "SmallcapequitiesMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ogs_StrandedDeferredTaxRemeasurementBenefit": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Stranded Deferred Tax Remeasurement Benefit", "label": "Stranded Deferred Tax Remeasurement Benefit", "terseLabel": "Stranded Deferred Tax Remeasurement Benefit" } } }, "localname": "StrandedDeferredTaxRemeasurementBenefit", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "ogs_TexasGasServiceonetimerefundsrelatedtotaxreform": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Texas Gas Service one-time refunds related to tax reform", "label": "Texas Gas Service one-time refunds related to tax reform", "terseLabel": "Texas Gas Service one-time refunds related to tax reform" } } }, "localname": "TexasGasServiceonetimerefundsrelatedtotaxreform", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "ogs_TotalDeferredCreditsAndOtherLiabilities": { "auth_ref": [], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 3.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Total obligations, excluding long-term debt, incurred as part of normal operations that is expected to be repaid beyond the following twelve months or one business cycle.", "label": "Total deferred credits and other liabilities", "totalLabel": "Total deferred credits and other liabilities" } } }, "localname": "TotalDeferredCreditsAndOtherLiabilities", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "ogs_Totalgoodwillandotherassets": { "auth_ref": [], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 3.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets, excluding property, plant and equipment, that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer.", "label": "Total goodwill and other assets", "totalLabel": "Total goodwill and other assets" } } }, "localname": "Totalgoodwillandotherassets", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "ogs_TotalregulatedliabilitiesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Represents the amount of total regulated liabilities.", "label": "Total regulated liabilities [Member]", "terseLabel": "Total regulated liabilities [Member]" } } }, "localname": "TotalregulatedliabilitiesMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "ogs_TotalregulatoryassetsnetofamortizationMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Total regulatory assets, net of amortization", "label": "Total regulatory assets, net of amortization [Member]", "terseLabel": "Total regulatory assets, net of amortization [Member]" } } }, "localname": "TotalregulatoryassetsnetofamortizationMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "ogs_TransportationrevenuesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Transportation revenues represent revenue from contracts with customers through implied contracts established by our tariff rates approved by the regulatory authorities and tariff-based negotiated contracts. The customer receives the benefits of our performance when the commodity is delivered to the customer and the performance obligation is satisfied over time as the customer consumes the natural gas.", "label": "Transportation revenues [Member]", "terseLabel": "Transportation revenues [Member]" } } }, "localname": "TransportationrevenuesMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RevenueDetails" ], "xbrltype": "domainItemType" }, "ogs_Treasurynotesinotherassets": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Treasury notes in other current and noncurrent assets", "label": "Treasury notes in other assets", "terseLabel": "Treasury notes in other assets" } } }, "localname": "Treasurynotesinotherassets", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails" ], "xbrltype": "monetaryItemType" }, "ogs_USLargeCapEquityMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "US Large Cap [Member]", "label": "US Large-Cap Equity [Member]", "terseLabel": "US Large-Cap Equity [Member]" } } }, "localname": "USLargeCapEquityMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ogs_UnderrecoveredpurchasedgascostsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Represents the amount of under-recovered purchased-gas costs [Member]", "label": "Under-recovered purchased-gas costs [Member]", "terseLabel": "Under-recovered purchased-gas costs [Member]" } } }, "localname": "UnderrecoveredpurchasedgascostsMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "ogs_WeathernormalizationMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Weather normalization represents revenue over- or under-recovered through the weather normalization adjustment rider in Kansas.", "label": "Weather normalization [Member]", "terseLabel": "Weather normalization [Member]" } } }, "localname": "WeathernormalizationMember", "nsuri": "http://www.onegas.com/20191231", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "srt_MaximumMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Maximum [Member]", "terseLabel": "Maximum [Member]" } } }, "localname": "MaximumMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "domainItemType" }, "srt_MinimumMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Minimum [Member]", "terseLabel": "Minimum [Member]" } } }, "localname": "MinimumMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "domainItemType" }, "srt_RangeAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statistical Measurement [Axis]", "terseLabel": "Statistical Measurement [Axis]" } } }, "localname": "RangeAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails", "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "srt_RangeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statistical Measurement [Domain]", "terseLabel": "Statistical Measurement [Domain]" } } }, "localname": "RangeMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails", "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "domainItemType" }, "srt_ScenarioUnspecifiedDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Scenario [Domain]", "terseLabel": "Scenario [Domain]" } } }, "localname": "ScenarioUnspecifiedDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/BalanceSheetsBalanceSheetsParenthetical", "http://www.onegas.com/role/CommitmentsAndContingenciesDetails", "http://www.onegas.com/role/CommitmentsAndContingenciesNotes", "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails", "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsNotes", "http://www.onegas.com/role/EarningsPerShareDetails", "http://www.onegas.com/role/EarningsPerShareNotes", "http://www.onegas.com/role/EarningsPerShareTables", "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/IncomeTaxesNotes", "http://www.onegas.com/role/IncomeTaxesTables", "http://www.onegas.com/role/OtherIncomeAndExpenseDetails", "http://www.onegas.com/role/OtherIncomeAndExpenseNotes", "http://www.onegas.com/role/OtherIncomeAndExpenseTables", "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails", "http://www.onegas.com/role/PropertyPlantAndEquipmentNotes", "http://www.onegas.com/role/PropertyPlantAndEquipmentTables", "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedDetails", "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedNotes", "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedTables", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesNotes", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesTables", "http://www.onegas.com/role/RevenueNotes", "http://www.onegas.com/role/RevenueTables", "http://www.onegas.com/role/ShareBasedPaymentsDetails", "http://www.onegas.com/role/ShareBasedPaymentsNotes", "http://www.onegas.com/role/ShareBasedPaymentsTables", "http://www.onegas.com/role/StatementsOfCashFlows", "http://www.onegas.com/role/StatementsOfComprehensiveIncomeStatementsOfComprehensiveIncome", "http://www.onegas.com/role/StatementsOfIncome", "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesDetails", "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesNotes", "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "domainItemType" }, "srt_StatementScenarioAxis": { "auth_ref": [ "r170", "r347" ], "lang": { "en-US": { "role": { "label": "Scenario [Axis]", "terseLabel": "Scenario [Axis]" } } }, "localname": "StatementScenarioAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/BalanceSheetsBalanceSheetsParenthetical", "http://www.onegas.com/role/CommitmentsAndContingenciesDetails", "http://www.onegas.com/role/CommitmentsAndContingenciesNotes", "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails", "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsNotes", "http://www.onegas.com/role/EarningsPerShareDetails", "http://www.onegas.com/role/EarningsPerShareNotes", "http://www.onegas.com/role/EarningsPerShareTables", "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/IncomeTaxesNotes", "http://www.onegas.com/role/IncomeTaxesTables", "http://www.onegas.com/role/OtherIncomeAndExpenseDetails", "http://www.onegas.com/role/OtherIncomeAndExpenseNotes", "http://www.onegas.com/role/OtherIncomeAndExpenseTables", "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails", "http://www.onegas.com/role/PropertyPlantAndEquipmentNotes", "http://www.onegas.com/role/PropertyPlantAndEquipmentTables", "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedDetails", "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedNotes", "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedTables", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesNotes", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesTables", "http://www.onegas.com/role/RevenueNotes", "http://www.onegas.com/role/RevenueTables", "http://www.onegas.com/role/ShareBasedPaymentsDetails", "http://www.onegas.com/role/ShareBasedPaymentsNotes", "http://www.onegas.com/role/ShareBasedPaymentsTables", "http://www.onegas.com/role/StatementsOfCashFlows", "http://www.onegas.com/role/StatementsOfComprehensiveIncomeStatementsOfComprehensiveIncome", "http://www.onegas.com/role/StatementsOfIncome", "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesDetails", "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesNotes", "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "stringItemType" }, "us-gaap_AccountingPoliciesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Accounting Policies [Abstract]" } } }, "localname": "AccountingPoliciesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_AccountsPayableCurrent": { "auth_ref": [ "r37" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 2.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Accounts Payable, Current", "terseLabel": "Accounts payable" } } }, "localname": "AccountsPayableCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimates": { "auth_ref": [ "r171" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of expense (reversal of expense) which increases (decreases) the accrual for environmental loss contingencies from revisions in estimates to existing obligations. Excludes changes related to business acquisitions, divestitures, or currency movement.", "label": "Accrual for Environmental Loss Contingencies, Revision in Estimates", "terseLabel": "Accrual for Environmental Loss Contingencies, Revision in Estimates" } } }, "localname": "AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimates", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent": { "auth_ref": [ "r5", "r40", "r281" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 3.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying value as of the balance sheet date of obligations incurred and payable for real and property taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Accrual for Taxes Other than Income Taxes, Current", "terseLabel": "Accrued taxes other than income" } } }, "localname": "AccrualForTaxesOtherThanIncomeTaxesCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax": { "auth_ref": [ "r55", "r60" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).", "label": "Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax", "terseLabel": "Accumulated other comprehensive loss, net of tax" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems": { "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": "Accumulated Other Comprehensive Income (Loss) [Line Items]", "terseLabel": "Accumulated Other Comprehensive Income (Loss) [Line Items]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossNotes", "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossTables" ], "xbrltype": "stringItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [ "r57", "r59", "r60" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 4.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.", "label": "Accumulated Other Comprehensive Income (Loss), Net of Tax", "periodEndLabel": "Accumulated Other Comprehensive Income (Loss), ending balance", "periodStartLabel": "Accumulated Other Comprehensive Income (Loss), beginning balance", "terseLabel": "Accumulated other comprehensive income (loss)" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Disclosure of information about components of accumulated other comprehensive income (loss).", "label": "Accumulated Other Comprehensive Income (Loss) [Table]", "terseLabel": "Accumulated Other Comprehensive Income (Loss) [Table]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossNotes", "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossTables" ], "xbrltype": "stringItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeMember": { "auth_ref": [ "r56", "r60", "r63", "r313" ], "lang": { "en-US": { "role": { "documentation": "Accumulated increase (decrease) in equity from transactions and other events and circumstances from non-owner sources, attributable to the parent. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners.", "label": "AOCI Attributable to Parent [Member]", "terseLabel": "Accumulated Other Comprehensive Income (Loss) [Member]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementOfChangesInEquity" ], "xbrltype": "domainItemType" }, "us-gaap_AdditionalPaidInCapital": { "auth_ref": [ "r25" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 2.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "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. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.", "label": "Additional Paid in Capital", "terseLabel": "Paid-in capital" } } }, "localname": "AdditionalPaidInCapital", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AdditionalPaidInCapitalMember": { "auth_ref": [], "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": "Additional Paid-in Capital [Member]" } } }, "localname": "AdditionalPaidInCapitalMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementOfChangesInEquity" ], "xbrltype": "domainItemType" }, "us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in additional paid in capital (APIC) resulting from a tax benefit (deficiency) associated with an share-based compensation plan other than an employee stock ownership plan (ESOP).", "label": "Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net", "terseLabel": "Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net" } } }, "localname": "AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementOfChangesInEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]", "terseLabel": "Adjustments to reconcile net income to net cash provided by operating activities:" } } }, "localname": "AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after tax, of expense for award under share-based payment arrangement.", "label": "Share-based Payment Arrangement, Expense, after Tax", "terseLabel": "Share-based compensation expense, net of tax" } } }, "localname": "AllocatedShareBasedCompensationExpenseNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent": { "auth_ref": [ "r30", "r147", "r152" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of allowance for credit loss on accounts receivable, classified as current.", "label": "Accounts Receivable, Allowance for Credit Loss, Current", "terseLabel": "Accounts Receivable, Allowance for Credit Loss, Current" } } }, "localname": "AllowanceForDoubtfulAccountsReceivableCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AmortizationOfRateDeferral": { "auth_ref": [ "r94" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The periodic expense to reduce the value of the rate deferral asset that is created when utilities under bill customers during periods of rate increases by deferring rate increases. These customers eventually pay higher rates to repay the utility for the rate deferral.", "label": "Amortization of Rate Deferral", "terseLabel": "Amortization of Rate Deferral" } } }, "localname": "AmortizationOfRateDeferral", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetImpairmentCharges": { "auth_ref": [ "r94", "r163" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.", "label": "Asset Impairment Charges", "terseLabel": "Asset Impairment Charges" } } }, "localname": "AssetImpairmentCharges", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetRetirementObligationsPolicy": { "auth_ref": [ "r104", "r167" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for legal obligation associated with retirement of long-lived asset that results from acquisition, construction, or development or from normal operation of long-lived asset. Excludes environmental remediation liability from improper or other-than-normal operation of long-lived asset, obligation arising in connection with leased property that meets definition of lease payments or variable lease payments and from plan to sell or otherwise dispose of a long-lived asset.", "label": "Asset Retirement Obligation [Policy Text Block]", "terseLabel": "Asset Retirement Obligations" } } }, "localname": "AssetRetirementObligationsPolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_Assets": { "auth_ref": [ "r140", "r353", "r373" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Assets [Abstract]", "verboseLabel": "Assets" } } }, "localname": "AssetsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_AssetsCurrent": { "auth_ref": [ "r1", "r2", "r53" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 2.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.", "label": "Assets, Current", "totalLabel": "Total current assets" } } }, "localname": "AssetsCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsCurrentAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Assets, Current [Abstract]", "verboseLabel": "Current assets" } } }, "localname": "AssetsCurrentAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_AwardTypeAxis": { "auth_ref": [ "r261", "r277" ], "lang": { "en-US": { "role": { "documentation": "Information by type of award under share-based payment arrangement.", "label": "Award Type [Axis]", "terseLabel": "Award Type [Axis]" } } }, "localname": "AwardTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "stringItemType" }, "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_BridgeLoan": { "auth_ref": [ "r11", "r355", "r374" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Short-Term financing which is expected to be paid back relatively quickly, such as by a subsequent longer-term loan. Also called swing loan or bridge financing.", "label": "Bridge Loan", "terseLabel": "Swingline subfacility" } } }, "localname": "BridgeLoan", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalizationLongtermDebtAndEquity": { "auth_ref": [], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 1.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "This element represents the total consolidated (as applicable) capitalization of the entity which is comprised of its long-term debt and equity instruments. The table may be detailed by subsidiary (legal entity) and include information by type of debt or equity detailed by instrument.", "label": "Capitalization, Long-term Debt and Equity", "totalLabel": "Total equity and long-term debt" } } }, "localname": "CapitalizationLongtermDebtAndEquity", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalizationLongtermDebtAndEquityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Capitalization, Long-term Debt and Equity [Abstract]", "terseLabel": "Equity and long-term debt" } } }, "localname": "CapitalizationLongtermDebtAndEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_CashAndCashEquivalentsAtCarryingValue": { "auth_ref": [ "r0", "r33", "r96" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 1.0, "parentTag": "us-gaap_AssetsCurrent", "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", "periodEndLabel": "Cash and cash equivalents at end of period", "periodStartLabel": "Cash and cash equivalents at beginning of period", "terseLabel": "Cash and cash equivalents" } } }, "localname": "CashAndCashEquivalentsAtCarryingValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease": { "auth_ref": [], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the 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. Includes effect from exchange rate changes.", "label": "Cash and Cash Equivalents, Period Increase (Decrease)", "totalLabel": "Change in cash and cash equivalents" } } }, "localname": "CashAndCashEquivalentsPeriodIncreaseDecrease", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndCashEquivalentsPolicyTextBlock": { "auth_ref": [ "r7", "r98", "r104" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ClassOfStockDomain": { "auth_ref": [], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheetsBalanceSheetsParenthetical", "http://www.onegas.com/role/EquityNotes" ], "xbrltype": "domainItemType" }, "us-gaap_ClassOfStockLineItems": { "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": "Class of Stock [Line Items]", "terseLabel": "Class of Stock [Line Items]" } } }, "localname": "ClassOfStockLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EquityNotes" ], "xbrltype": "stringItemType" }, "us-gaap_CommercialPaper": { "auth_ref": [ "r12", "r354", "r375" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 1.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.", "label": "Commercial Paper", "terseLabel": "Notes payable", "verboseLabel": "Commercial Paper" } } }, "localname": "CommercialPaper", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CommitmentsAndContingencies": { "auth_ref": [ "r46", "r169", "r360", "r379" ], "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" } } }, "localname": "CommitmentsAndContingencies", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/StatementOfChangesInEquity" ], "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/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_CommitmentsAndContingenciesDisclosureTextBlock": { "auth_ref": [ "r168", "r172" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for commitments and contingencies.", "label": "Commitments and Contingencies Disclosure [Text Block]", "verboseLabel": "COMMITMENTS AND CONTINGENCIES" } } }, "localname": "CommitmentsAndContingenciesDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_CommitmentsAndContingenciesPolicyTextBlock": { "auth_ref": [ "r104", "r173", "r385", "r386" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for commitments and contingencies, which may include policies for recognizing and measuring loss and gain contingencies.", "label": "Commitments and Contingencies, Policy [Policy Text Block]", "terseLabel": "Contingencies" } } }, "localname": "CommitmentsAndContingenciesPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CommonStockCapitalSharesReservedForFutureIssuance": { "auth_ref": [ "r48" ], "lang": { "en-US": { "role": { "documentation": "Aggregate number of common shares reserved for future issuance.", "label": "Common Stock, Capital Shares Reserved for Future Issuance", "terseLabel": "Common Stock, Capital Shares Reserved for Future Issuance" } } }, "localname": "CommonStockCapitalSharesReservedForFutureIssuance", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockDividendsPerShareCashPaid": { "auth_ref": [ "r190" ], "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": "Dividends declared per share of stock" } } }, "localname": "CommonStockDividendsPerShareCashPaid", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EquityDetails", "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockDividendsPerShareDeclared": { "auth_ref": [ "r190" ], "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": "Common Stock, Dividends, Per Share, Declared" } } }, "localname": "CommonStockDividendsPerShareDeclared", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EquityDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Stock that is subordinate to all other stock of the issuer.", "label": "Common Stock [Member]", "terseLabel": "Common Stock [Member]" } } }, "localname": "CommonStockMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementOfChangesInEquity" ], "xbrltype": "domainItemType" }, "us-gaap_CommonStockParOrStatedValuePerShare": { "auth_ref": [ "r23" ], "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 or Stated Value Per Share" } } }, "localname": "CommonStockParOrStatedValuePerShare", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheetsBalanceSheetsParenthetical" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockSharesAuthorized": { "auth_ref": [ "r23" ], "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" } } }, "localname": "CommonStockSharesAuthorized", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheetsBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesIssued": { "auth_ref": [ "r23" ], "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", "terseLabel": "Common Stock, Shares, Issued" } } }, "localname": "CommonStockSharesIssued", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheetsBalanceSheetsParenthetical", "http://www.onegas.com/role/EarningsPerShareDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesOutstanding": { "auth_ref": [ "r23", "r183" ], "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", "terseLabel": "Common Stock, Shares, Outstanding" } } }, "localname": "CommonStockSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheetsBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockValue": { "auth_ref": [ "r23" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "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 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", "verboseLabel": "Common stock, $0.01 par value: authorized 250,000,000 shares; issued and outstanding 52,771,749 shares at December 31, 2019; issued 52,598,005 shares and outstanding 52,564,902 shares at December 31, 2018" } } }, "localname": "CommonStockValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_ComponentsOfDeferredTaxAssetsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Components of Deferred Tax Assets [Abstract]", "terseLabel": "Deferred tax assets" } } }, "localname": "ComponentsOfDeferredTaxAssetsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ComponentsOfDeferredTaxLiabilitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Components of Deferred Tax Liabilities [Abstract]", "terseLabel": "Deferred tax liabilities" } } }, "localname": "ComponentsOfDeferredTaxLiabilitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]", "terseLabel": "Provision for income taxes [Abstract]" } } }, "localname": "ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ComprehensiveIncomeNetOfTax": { "auth_ref": [ "r66", "r68", "r69" ], "calculation": { "http://www.onegas.com/role/StatementsOfComprehensiveIncomeStatementsOfComprehensiveIncome": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.", "label": "Comprehensive Income (Loss), Net of Tax, Attributable to Parent", "totalLabel": "Comprehensive income" } } }, "localname": "ComprehensiveIncomeNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfComprehensiveIncomeStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_ComprehensiveIncomeNoteTextBlock": { "auth_ref": [ "r80" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.", "label": "Comprehensive Income (Loss) Note [Text Block]", "terseLabel": "Comprehensive Income (Loss) Note [Text Block]" } } }, "localname": "ComprehensiveIncomeNoteTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_ConstructionInProgressExpendituresIncurredButNotYetPaid": { "auth_ref": [ "r100", "r101", "r102" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Future cash outflow to pay for construction in progress expenditures that have occurred.", "label": "Construction in Progress Expenditures Incurred but Not yet Paid", "terseLabel": "Construction work in process expenditures incurred but not yet paid" } } }, "localname": "ConstructionInProgressExpendituresIncurredButNotYetPaid", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ConstructionInProgressMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.", "label": "Construction in Progress [Member]", "terseLabel": "Construction work in process" } } }, "localname": "ConstructionInProgressMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CostOfSalesPolicyTextBlock": { "auth_ref": [ "r196" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for cost of product sold and service rendered.", "label": "Cost of Goods and Service [Policy Text Block]", "terseLabel": "Cost of Natural Gas [Policy Text Block]" } } }, "localname": "CostOfSalesPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CurrentFederalTaxExpenseBenefit": { "auth_ref": [ "r107", "r302", "r306" ], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": 1.0, "parentTag": "us-gaap_CurrentIncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.", "label": "Current Federal Tax Expense (Benefit)", "verboseLabel": "Federal" } } }, "localname": "CurrentFederalTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CurrentIncomeTaxExpenseBenefit": { "auth_ref": [ "r107", "r302", "r306" ], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "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)", "totalLabel": "Total current income tax provision (benefit)" } } }, "localname": "CurrentIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Current Income Tax Expense (Benefit), Continuing Operations [Abstract]", "terseLabel": "Current income tax provision (benefit)" } } }, "localname": "CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_CurrentStateAndLocalTaxExpenseBenefit": { "auth_ref": [ "r107", "r302", "r306" ], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": 2.0, "parentTag": "us-gaap_CurrentIncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.", "label": "Current State and Local Tax Expense (Benefit)", "verboseLabel": "State" } } }, "localname": "CurrentStateAndLocalTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CustomerDepositsCurrent": { "auth_ref": [ "r40" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 4.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The current portion of money or property received from customers which is either to be returned upon satisfactory contract completion or applied to customer receivables in accordance with the terms of the contract or the understandings.", "label": "Customer Deposits, Current", "terseLabel": "Customer deposits" } } }, "localname": "CustomerDepositsCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtInstrumentAxis": { "auth_ref": [ "r14", "r16", "r17", "r355", "r357", "r371" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableNotes", "http://www.onegas.com/role/LongTermDebtDetails", "http://www.onegas.com/role/LongTermDebtNotes" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentCallFeature": { "auth_ref": [ "r43", "r366" ], "lang": { "en-US": { "role": { "documentation": "Description of a feature that permits the issuer of the debt to repay or convert it before the stated maturity date (early retirement date). The description may include such items as the call price, the period that the issuer can call the debt, including the earliest call date, and other significant terms of the call feature, which may include the debt holders' ability to convert the debt to equity if the call option is exercised and contingent events that trigger the issuer's ability to call the debt.", "label": "Debt Instrument, Call Feature", "terseLabel": "Debt Instrument, Call Feature" } } }, "localname": "DebtInstrumentCallFeature", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentCarryingAmount": { "auth_ref": [ "r17", "r175", "r357", "r371" ], "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": "Long-term Debt, Gross" } } }, "localname": "DebtInstrumentCarryingAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtInstrumentCovenantDescription": { "auth_ref": [ "r17", "r367" ], "lang": { "en-US": { "role": { "documentation": "Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.", "label": "Debt Instrument, Covenant Description", "terseLabel": "Debt Instrument, Covenant Description" } } }, "localname": "DebtInstrumentCovenantDescription", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails", "http://www.onegas.com/role/LongTermDebtDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentInterestRateStatedPercentage": { "auth_ref": [ "r42" ], "lang": { "en-US": { "role": { "documentation": "Contractual interest rate for funds borrowed, under the debt agreement.", "label": "Debt Instrument, Interest Rate, Stated Percentage", "terseLabel": "Debt Instrument, Interest Rate, Stated Percentage" } } }, "localname": "DebtInstrumentInterestRateStatedPercentage", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails", "http://www.onegas.com/role/LongTermDebtNotes" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentNameDomain": { "auth_ref": [ "r44" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableNotes", "http://www.onegas.com/role/LongTermDebtDetails", "http://www.onegas.com/role/LongTermDebtNotes" ], "xbrltype": "domainItemType" }, "us-gaap_DebtInstrumentRedemptionPeriodAxis": { "auth_ref": [ "r368" ], "lang": { "en-US": { "role": { "documentation": "Information about timing of debt redemption features under terms of the debt agreement.", "label": "Debt Instrument, Redemption, Period [Axis]", "terseLabel": "Debt Instrument, Redemption, Period [Axis]" } } }, "localname": "DebtInstrumentRedemptionPeriodAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails", "http://www.onegas.com/role/LongTermDebtNotes" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentRedemptionPeriodDomain": { "auth_ref": [ "r368" ], "lang": { "en-US": { "role": { "documentation": "Period as defined under terms of the debt agreement for debt redemption features.", "label": "Debt Instrument, Redemption, Period [Domain]", "terseLabel": "Debt Instrument, Redemption, Period [Domain]" } } }, "localname": "DebtInstrumentRedemptionPeriodDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails", "http://www.onegas.com/role/LongTermDebtNotes" ], "xbrltype": "domainItemType" }, "us-gaap_DebtInstrumentRedemptionPricePercentage": { "auth_ref": [ "r368" ], "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": "Debt Instrument, Redemption Price, Percentage" } } }, "localname": "DebtInstrumentRedemptionPricePercentage", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DebtInstrumentTable": { "auth_ref": [ "r44", "r109", "r184", "r187", "r188", "r189", "r326", "r327", "r329", "r369" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails", "http://www.onegas.com/role/LongTermDebtNotes" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet": { "auth_ref": [ "r176", "r328" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of unamortized debt discount (premium) and debt issuance costs.", "label": "Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net", "terseLabel": "Debt issuance costs" } } }, "localname": "DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheetsBalanceSheetsParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredFederalIncomeTaxExpenseBenefit": { "auth_ref": [ "r107", "r303", "r306" ], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": 1.0, "parentTag": "us-gaap_DeferredIncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.", "label": "Deferred Federal Income Tax Expense (Benefit)", "terseLabel": "Federal" } } }, "localname": "DeferredFederalIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredIncomeTaxExpenseBenefit": { "auth_ref": [ "r94", "r107", "r303", "r306" ], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 8.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "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)", "terseLabel": "Deferred income taxes", "totalLabel": "Total deferred income tax provision" } } }, "localname": "DeferredIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]", "terseLabel": "Deferred income tax provision" } } }, "localname": "DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DeferredIncomeTaxLiabilities": { "auth_ref": [ "r19", "r20", "r294", "r356", "r370" ], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": 2.0, "parentTag": "us-gaap_DeferredTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences.", "label": "Deferred Tax Liabilities, Gross", "totalLabel": "Total deferred tax liabilities" } } }, "localname": "DeferredIncomeTaxLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit": { "auth_ref": [ "r107", "r303", "r306" ], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": 2.0, "parentTag": "us-gaap_DeferredIncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.", "label": "Deferred State and Local Income Tax Expense (Benefit)", "terseLabel": "State" } } }, "localname": "DeferredStateAndLocalIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsGross": { "auth_ref": [ "r295" ], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": 1.0, "parentTag": "us-gaap_DeferredTaxLiabilities", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.", "label": "Deferred Tax Assets, Gross", "totalLabel": "Total deferred tax assets" } } }, "localname": "DeferredTaxAssetsGross", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsOperatingLossCarryforwards": { "auth_ref": [ "r283", "r300", "r301" ], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": 3.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.", "label": "Deferred Tax Assets, Operating Loss Carryforwards", "terseLabel": "Net operating loss" } } }, "localname": "DeferredTaxAssetsOperatingLossCarryforwards", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal": { "auth_ref": [ "r283", "r300", "r301" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards.", "label": "Deferred Tax Assets, Operating Loss Carryforwards, State and Local", "terseLabel": "Deferred Tax Assets, Operating Loss Carryforwards, State and Local" } } }, "localname": "DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsOther": { "auth_ref": [ "r284", "r300", "r301" ], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": 5.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other.", "label": "Deferred Tax Assets, Other", "terseLabel": "Other" } } }, "localname": "DeferredTaxAssetsOther", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsValuationAllowance": { "auth_ref": [ "r296" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.", "label": "Deferred Tax Assets, Valuation Allowance", "terseLabel": "Deferred Tax Assets, Valuation Allowance" } } }, "localname": "DeferredTaxAssetsValuationAllowance", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilities": { "auth_ref": [ "r288", "r297" ], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.", "label": "Deferred Tax Liabilities, Net", "totalLabel": "Net deferred tax liabilities" } } }, "localname": "DeferredTaxLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesLeasingArrangements": { "auth_ref": [ "r284", "r300", "r301" ], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": 4.0, "parentTag": "us-gaap_DeferredIncomeTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences from leasing arrangements.", "label": "Deferred Tax Liabilities, Leasing Arrangements", "terseLabel": "Deferred Tax Liabilities, Leasing Arrangements" } } }, "localname": "DeferredTaxLiabilitiesLeasingArrangements", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesNetAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Deferred Tax Liabilities, Net [Abstract]", "terseLabel": "Deferred Tax Liabilities, Net [Abstract]" } } }, "localname": "DeferredTaxLiabilitiesNetAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DeferredTaxLiabilitiesNoncurrent": { "auth_ref": [ "r287", "r288", "r289" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 1.0, "parentTag": "ogs_TotalDeferredCreditsAndOtherLiabilities", "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 and classified as noncurrent.", "label": "Deferred Tax Liabilities, Net, Noncurrent", "terseLabel": "Deferred income taxes" } } }, "localname": "DeferredTaxLiabilitiesNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesOther": { "auth_ref": [ "r284", "r300", "r301" ], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": 3.0, "parentTag": "us-gaap_DeferredIncomeTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences classified as other.", "label": "Deferred Tax Liabilities, Other", "terseLabel": "Other regulatory assets and liabilities, net" } } }, "localname": "DeferredTaxLiabilitiesOther", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment": { "auth_ref": [ "r284", "r300", "r301" ], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": 1.0, "parentTag": "us-gaap_DeferredIncomeTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.", "label": "Deferred Tax Liabilities, Property, Plant and Equipment", "terseLabel": "Excess of tax over book depreciation" } } }, "localname": "DeferredTaxLiabilitiesPropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesRegulatoryAssets": { "auth_ref": [ "r284", "r300", "r301" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences from regulatory assets.", "label": "Deferred Tax Liabilities, Regulatory Assets", "terseLabel": "Deferred income taxes" } } }, "localname": "DeferredTaxLiabilitiesRegulatoryAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities": { "auth_ref": [ "r284", "r300", "r301" ], "calculation": { "http://www.onegas.com/role/IncomeTaxesDetails": { "order": 2.0, "parentTag": "us-gaap_DeferredIncomeTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences from regulatory assets and liabilities.", "label": "Deferred Tax Liabilities, Regulatory Assets and Liabilities", "terseLabel": "Purchased-gas cost adjustment" } } }, "localname": "DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation": { "auth_ref": [ "r222" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.", "label": "Defined Benefit Plan, Accumulated Benefit Obligation", "terseLabel": "Accumulated benefit obligation" } } }, "localname": "DefinedBenefitPlanAccumulatedBenefitObligation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax": { "auth_ref": [ "r55", "r60" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).", "label": "Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax", "terseLabel": "Accumulated other comprehensive loss after regulatory assets" } } }, "localname": "DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax": { "auth_ref": [ "r60", "r232" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.", "label": "Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax", "terseLabel": "Accumulated loss" } } }, "localname": "DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax": { "auth_ref": [ "r60", "r232" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).", "label": "Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax", "verboseLabel": "Prior service credit (cost)" } } }, "localname": "DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets": { "auth_ref": [ "r210", "r252" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses.", "label": "Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)", "terseLabel": "Actual return on plan assets" } } }, "localname": "DefinedBenefitPlanActualReturnOnPlanAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanActuarialGainLoss": { "auth_ref": [ "r207" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.", "label": "Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)", "terseLabel": "Actuarial loss (gain)" } } }, "localname": "DefinedBenefitPlanActuarialGainLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses": { "auth_ref": [ "r229", "r249", "r252" ], "calculation": { "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails": { "order": 1.0, "parentTag": "ogs_Othercomprehensiveincomelossreclassificationadjustmentbeforetaxandregulatoryadjustments", "weight": 1.0 }, "http://www.onegas.com/role/EmployeeBenefitPlansDetails": { "order": 4.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.", "label": "Defined Benefit Plan, Amortization of Gain (Loss)", "negatedLabel": "Amortization of net loss", "negatedTerseLabel": "Defined Benefit Plan, Amortization of Gain (Loss)" } } }, "localname": "DefinedBenefitPlanAmortizationOfGainsLosses", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit": { "auth_ref": [ "r230", "r250", "r252" ], "calculation": { "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails": { "order": 2.0, "parentTag": "ogs_Othercomprehensiveincomelossreclassificationadjustmentbeforetaxandregulatoryadjustments", "weight": -1.0 }, "http://www.onegas.com/role/EmployeeBenefitPlansDetails": { "order": 5.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.", "label": "Defined Benefit Plan, Amortization of Prior Service Cost (Credit)", "terseLabel": "Amortization of unrecognized prior service cost" } } }, "localname": "DefinedBenefitPlanAmortizationOfPriorServiceCostCredit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet": { "auth_ref": [ "r199", "r215" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans.", "label": "Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position", "terseLabel": "Balance at December 31" } } }, "localname": "DefinedBenefitPlanAmountsRecognizedInBalanceSheet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax": { "auth_ref": [ "r54", "r57", "r231" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, before tax, after reclassification adjustment, of increase (decrease) in accumulated other comprehensive income from gain (loss) of defined benefit plan.", "label": "Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax", "terseLabel": "Amount recognized in other comprehensive income" } } }, "localname": "DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAssetsExpectedToBeReturnedToEmployerAmount": { "auth_ref": [ "r240" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of defined benefit plan asset expected to be returned to employer during 12-month period, or operating cycle, if longer, following latest fiscal year.", "label": "Defined Benefit Plan, Plan Assets, Expected to be Returned to Employer, Amount", "terseLabel": "Assets expected to be withdrawn or returned" } } }, "localname": "DefinedBenefitPlanAssetsExpectedToBeReturnedToEmployerAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate": { "auth_ref": [ "r234" ], "lang": { "en-US": { "role": { "documentation": "Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.", "label": "Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate", "terseLabel": "Discount rate" } } }, "localname": "DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate": { "auth_ref": [ "r234" ], "lang": { "en-US": { "role": { "documentation": "Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan.", "label": "Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate", "terseLabel": "Weighted average discount rate" } } }, "localname": "DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets": { "auth_ref": [ "r235" ], "lang": { "en-US": { "role": { "documentation": "Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.", "label": "Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets", "terseLabel": "Expected long-term return on plan assets" } } }, "localname": "DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DefinedBenefitPlanBenefitObligation": { "auth_ref": [ "r202" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.", "label": "Defined Benefit Plan, Benefit Obligation", "periodEndLabel": "Benefit obligation, end of period", "periodStartLabel": "Benefit obligation, beginning of period" } } }, "localname": "DefinedBenefitPlanBenefitObligation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid": { "auth_ref": [ "r208", "r256" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.", "label": "Defined Benefit Plan, Benefit Obligation, Benefits Paid", "negatedTerseLabel": "Defined Benefit Plan, Benefit Obligation, Benefits Paid" } } }, "localname": "DefinedBenefitPlanBenefitObligationBenefitsPaid", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant": { "auth_ref": [ "r206" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of contributions received by defined benefit plan from participant which increase benefit obligation.", "label": "Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant", "terseLabel": "Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant" } } }, "localname": "DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanBenefitObligationPaymentForSettlement": { "auth_ref": [ "r204", "r253" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of payment, which decreases benefit obligation of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract. Excludes decreases to benefit obligation for remeasurement due to settlement.", "label": "Defined Benefit Plan, Benefit Obligation, Payment for Settlement", "terseLabel": "Defined Benefit Plan, Benefit Obligation, Payment for Settlement" } } }, "localname": "DefinedBenefitPlanBenefitObligationPaymentForSettlement", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis": { "auth_ref": [ "r218", "r220", "r238", "r252" ], "lang": { "en-US": { "role": { "documentation": "Information by defined benefit plan asset investment.", "label": "Defined Benefit Plan, Plan Assets, Category [Axis]", "terseLabel": "Defined Benefit Plan, Plan Assets, Category [Axis]" } } }, "localname": "DefinedBenefitPlanByPlanAssetCategoriesAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward": { "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": "Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]", "terseLabel": "Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]" } } }, "localname": "DefinedBenefitPlanChangeInBenefitObligationRollForward", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward": { "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": "Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]", "terseLabel": "Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]" } } }, "localname": "DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward": { "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": "Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]", "terseLabel": "Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]" } } }, "localname": "DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanContributionsByEmployer": { "auth_ref": [ "r211", "r218", "r220", "r251", "r252" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of contribution received by defined benefit plan from employer which increases plan assets.", "label": "Defined Benefit Plan, Plan Assets, Contributions by Employer", "verboseLabel": "Employer contributions" } } }, "localname": "DefinedBenefitPlanContributionsByEmployer", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1": { "auth_ref": [ "r237" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of decrease in accumulated postretirement benefit obligation from one-percentage-point decrease in assumed health care cost trend rate.", "label": "Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation", "negatedTerseLabel": "Effect of a one percentage point change on other postemployment benefit obligation - decrease" } } }, "localname": "DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1": { "auth_ref": [ "r237" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of decrease in service and interest cost components of net periodic postretirement benefit cost from one-percentage-point decrease in assumed health care cost trend rate.", "label": "Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components", "negatedTerseLabel": "Effect of a one percentage point change on total of service and interest cost - decrease" } } }, "localname": "DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation": { "auth_ref": [ "r237" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of increase in accumulated postretirement benefit obligation from one-percentage-point increase in assumed health care cost trend rate.", "label": "Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation", "terseLabel": "Effect of a one percentage point change on other postemployment benefit obligation - increase" } } }, "localname": "DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents": { "auth_ref": [ "r237" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase in service and interest cost components of net periodic postretirement benefit cost from one-percentage-point increase in assumed health care cost trend rate.", "label": "Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components", "terseLabel": "Effect of a one percentage point change on total of service and interest cost - increase" } } }, "localname": "DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter": { "auth_ref": [ "r223" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year.", "label": "Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter", "terseLabel": "2022 through 2027" } } }, "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths": { "auth_ref": [ "r223" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year.", "label": "Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months", "terseLabel": "2017" } } }, "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive": { "auth_ref": [ "r223" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year.", "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year Five", "terseLabel": "2021" } } }, "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour": { "auth_ref": [ "r223" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of benefits for defined benefit plan expected to be paid in fourth fiscal year following latest fiscal year.", "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year Four", "terseLabel": "2020" } } }, "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree": { "auth_ref": [ "r223" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year.", "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year Three", "terseLabel": "2019" } } }, "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo": { "auth_ref": [ "r223" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year.", "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year Two", "terseLabel": "2018" } } }, "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear": { "auth_ref": [ "r224" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year.", "label": "Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year", "terseLabel": "Expected employer contributions in 2017" } } }, "localname": "DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets": { "auth_ref": [ "r228", "r248", "r252" ], "calculation": { "http://www.onegas.com/role/EmployeeBenefitPlansDetails": { "order": 3.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.", "label": "Defined Benefit Plan, Expected Return (Loss) on Plan Assets", "negatedTerseLabel": "Expected return on assets" } } }, "localname": "DefinedBenefitPlanExpectedReturnOnPlanAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanFairValueOfPlanAssets": { "auth_ref": [ "r209", "r218", "r220", "r252" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.", "label": "Defined Benefit Plan, Plan Assets, Amount", "periodEndLabel": "Fair value of plan assets, end of period" } } }, "localname": "DefinedBenefitPlanFairValueOfPlanAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanFundedStatusOfPlan": { "auth_ref": [ "r199", "r215" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.", "label": "Defined Benefit Plan, Funded (Unfunded) Status of Plan", "terseLabel": "Balance at December 31" } } }, "localname": "DefinedBenefitPlanFundedStatusOfPlan", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear": { "auth_ref": [ "r236" ], "lang": { "en-US": { "role": { "documentation": "Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status.", "label": "Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year", "terseLabel": "Health care cost-trend rate assumed for next year" } } }, "localname": "DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DefinedBenefitPlanInterestCost": { "auth_ref": [ "r205", "r227", "r247", "r252" ], "calculation": { "http://www.onegas.com/role/EmployeeBenefitPlansDetails": { "order": 2.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cost recognized for passage of time related to defined benefit plan.", "label": "Defined Benefit Plan, Interest Cost", "verboseLabel": "Interest cost" } } }, "localname": "DefinedBenefitPlanInterestCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanInvestmentPoliciesAndStrategiesNarrativeDescription": { "auth_ref": [ "r217", "r252" ], "lang": { "en-US": { "role": { "documentation": "Description of investment policy and strategy for defined benefit plan asset. Includes, but is not limited to, investment allocation decision and factor pertinent to understanding investment policy and strategy for plan asset. Factor includes, but is not limited to, investment goal, risk management practice, permitted and prohibited investment including use of derivative, diversification, and relationship between plan asset and obligation.", "label": "Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description", "terseLabel": "Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description" } } }, "localname": "DefinedBenefitPlanInvestmentPoliciesAndStrategiesNarrativeDescription", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanNarrativeDescriptionOfBasisUsedToDetermineOverallExpectedLongTermRateOfReturnOnAssetsAssumption": { "auth_ref": [ "r219" ], "lang": { "en-US": { "role": { "documentation": "Description of basis used to determine overall expected long-term rate-of-return assumption for plan asset of defined benefit plan. Includes, but is not limited to, approach used, and extent approach was based on historical return and adjustment made to reflect expectation of future return.", "label": "Defined Benefit Plan, Plan Assets, Expected Long-term Rate-of-Return, Description", "terseLabel": "Description of basis used to determine overall expected long-term rate of return on plan assets" } } }, "localname": "DefinedBenefitPlanNarrativeDescriptionOfBasisUsedToDetermineOverallExpectedLongTermRateOfReturnOnAssetsAssumption", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost": { "auth_ref": [ "r225", "r245", "r252" ], "calculation": { "http://www.onegas.com/role/EmployeeBenefitPlansDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of net periodic benefit cost (credit) for defined benefit plan.", "label": "Defined Benefit Plan, Net Periodic Benefit Cost (Credit)", "totalLabel": "Net periodic benefit cost" } } }, "localname": "DefinedBenefitPlanNetPeriodicBenefitCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid": { "auth_ref": [ "r213", "r256" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.", "label": "Defined Benefit Plan, Plan Assets, Benefits Paid", "negatedTerseLabel": "Benefits paid" } } }, "localname": "DefinedBenefitPlanPlanAssetsBenefitsPaid", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanPlanAssetsContributionsByPlanParticipant": { "auth_ref": [ "r212" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of contributions received by defined benefit plan from participant which increases plan assets.", "label": "Defined Benefit Plan, Plan Assets, Contributions by Plan Participant", "terseLabel": "Defined Benefit Plan, Plan Assets, Contributions by Plan Participant" } } }, "localname": "DefinedBenefitPlanPlanAssetsContributionsByPlanParticipant", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage": { "auth_ref": [ "r217", "r252" ], "lang": { "en-US": { "role": { "documentation": "Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.", "label": "Defined Benefit Plan, Plan Assets, Target Allocation, Percentage", "terseLabel": "Target asset allocation" } } }, "localname": "DefinedBenefitPlanPlanAssetsTargetAllocationPercentage", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DefinedBenefitPlanServiceCost": { "auth_ref": [ "r203", "r226", "r246", "r252" ], "calculation": { "http://www.onegas.com/role/EmployeeBenefitPlansDetails": { "order": 1.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.", "label": "Defined Benefit Plan, Service Cost", "netLabel": "Service cost", "terseLabel": "Service cost" } } }, "localname": "DefinedBenefitPlanServiceCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanSettlementsBenefitObligation": { "auth_ref": [ "r204" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement.", "label": "Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement", "negatedLabel": "Settlements" } } }, "localname": "DefinedBenefitPlanSettlementsBenefitObligation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanSettlementsPlanAssets": { "auth_ref": [ "r214" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of payment, which decreases plan assets of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract.", "label": "Defined Benefit Plan, Plan Assets, Payment for Settlement", "terseLabel": "Settlements" } } }, "localname": "DefinedBenefitPlanSettlementsPlanAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1": { "auth_ref": [ "r236" ], "lang": { "en-US": { "role": { "documentation": "Ultimate trend rate for health care cost for defined benefit postretirement plan.", "label": "Defined Benefit Plan, Ultimate Health Care Cost Trend Rate", "terseLabel": "Rate to which the cost-trend rate is assumed to decline (the ultimate trend rate)" } } }, "localname": "DefinedBenefitPlanUltimateHealthCareCostTrendRate1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate": { "auth_ref": [ "r236" ], "lang": { "en-US": { "role": { "documentation": "Year ultimate health care cost trend rate is expected to be reached, in CCYY format.", "label": "Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate", "terseLabel": "Year that the rate reaches the ultimate trend rate" } } }, "localname": "DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "gYearListItemType" }, "us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable": { "auth_ref": [ "r241", "r242", "r243", "r244", "r252" ], "lang": { "en-US": { "role": { "documentation": "Disclosures and provisions pertaining to defined benefit pension plans or other postretirement defined benefit plans. The arrangements are generally based on terms and conditions stipulated by the entity, and which contain a promise by the employer to pay certain amounts or awards at designated future dates, including a period after retirement, upon compliance with stipulated requirements. Excludes disclosures pertaining to defined contribution plans.", "label": "Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]", "terseLabel": "Defined Benefit Plans and Other Postemployment Benefit Plans Disclosures [Table]" } } }, "localname": "DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails", "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems": { "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": "Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]", "terseLabel": "Defined Benefit Plans and Other Postemployment Benefit Plans Table Text Block [Line Items]" } } }, "localname": "DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails", "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedContributionPensionAndOtherPostretirementPlansDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Defined Contribution Plan [Abstract]", "terseLabel": "Pension and other postretirement benefit plans obligations [Abstract]" } } }, "localname": "DefinedContributionPensionAndOtherPostretirementPlansDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeNonmonetaryNotionalAmount": { "auth_ref": [ "r315", "r316" ], "lang": { "en-US": { "role": { "documentation": "Nominal number of units used to calculate payment on derivative.", "label": "Derivative, Nonmonetary Notional Amount", "terseLabel": "Derivative, Nonmonetary Notional Amount" } } }, "localname": "DerivativeNonmonetaryNotionalAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails" ], "xbrltype": "decimalItemType" }, "us-gaap_DerivativesReportingOfDerivativeActivity": { "auth_ref": [ "r104", "r110", "r314" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for derivatives entered into for trading purposes and those entered into for purposes other than trading including where and when derivative financial instruments and derivative commodity instruments and their related gains or losses are reported in the entity's statements of financial position, cash flows, and results of operations.", "label": "Derivatives, Reporting of Derivative Activity [Policy Text Block]", "terseLabel": "Derivatives and Risk Management Activities" } } }, "localname": "DerivativesReportingOfDerivativeActivity", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_DilutiveSecurities": { "auth_ref": [ "r122" ], "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 stock options, restrictive stock units (RSUs), convertible preferred stock of an employee stock ownership plan (ESOP), and other dilutive convertible securities.", "label": "Dilutive Securities, Effect on Basic Earnings Per Share", "terseLabel": "Dilutive Securities, Effect on Basic Earnings Per Share" } } }, "localname": "DilutiveSecurities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EarningsPerShareDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock": { "auth_ref": [ "r280" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for share-based payment arrangement.", "label": "Share-based Payment Arrangement [Text Block]", "terseLabel": "Disclosure of Compensation Related Costs, Share-based Payments" } } }, "localname": "DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Share-based Payment Arrangement [Abstract]" } } }, "localname": "DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_DividendsCommonStock": { "auth_ref": [ "r190", "r365" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).", "label": "Dividends, Common Stock", "negatedLabel": "Common stock dividends" } } }, "localname": "DividendsCommonStock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementOfChangesInEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_EarningsPerShareAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Earnings Per Share [Abstract]", "terseLabel": "Earnings per share" } } }, "localname": "EarningsPerShareAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_EarningsPerShareBasic": { "auth_ref": [ "r76", "r113", "r117", "r118", "r119", "r120", "r124", "r363", "r381" ], "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", "verboseLabel": "Earnings Per Share, Basic" } } }, "localname": "EarningsPerShareBasic", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EarningsPerShareDetails", "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedDetails", "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "perShareItemType" }, "us-gaap_EarningsPerShareDiluted": { "auth_ref": [ "r76", "r113", "r117", "r118", "r119", "r120", "r124", "r363", "r381" ], "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", "verboseLabel": "Earnings Per Share, Diluted" } } }, "localname": "EarningsPerShareDiluted", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EarningsPerShareDetails", "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedDetails", "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "perShareItemType" }, "us-gaap_EarningsPerSharePolicyTextBlock": { "auth_ref": [ "r104", "r121", "r122", "r123" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_EarningsPerShareTextBlock": { "auth_ref": [ "r125" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for earnings per share.", "label": "Earnings Per Share [Text Block]", "terseLabel": "Earnings Per Share [Text Block]" } } }, "localname": "EarningsPerShareTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EarningsPerShareNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate": { "auth_ref": [ "r290", "r291", "r305" ], "lang": { "en-US": { "role": { "documentation": "Percentage of domestic federal statutory tax rate applicable to pretax income (loss).", "label": "Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent", "terseLabel": "Federal Statutory Income Tax Rate" } } }, "localname": "EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized": { "auth_ref": [ "r276" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cost not yet recognized for nonvested award under share-based payment arrangement.", "label": "Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount", "terseLabel": "Total compensation cost not yet recognized" } } }, "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1": { "auth_ref": [ "r276" ], "lang": { "en-US": { "role": { "documentation": "Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition", "terseLabel": "Total compensation cost not yet recognized, period for recognition" } } }, "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "durationItemType" }, "us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense": { "auth_ref": [ "r275" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of tax benefit for recognition of expense of award under share-based payment arrangement.", "label": "Share-based Payment Arrangement, Expense, Tax Benefit", "terseLabel": "Share-based compensation, tax benefit" } } }, "localname": "EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EmployeeStockMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "An Employee Stock Purchase Plan is a tax-efficient means by which employees of a corporation can purchase the corporation's stock.", "label": "Employee Stock [Member]", "terseLabel": "Employee Stock Purchase Plan [Member]" } } }, "localname": "EmployeeStockMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_EmployeeStockOwnershipPlanESOPCompensationExpense": { "auth_ref": [ "r279" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of plan compensation cost recognized during the period.", "label": "Employee Stock Ownership Plan (ESOP), Compensation Expense", "terseLabel": "Employee Stock Purchase Plan Compensation Expense" } } }, "localname": "EmployeeStockOwnershipPlanESOPCompensationExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Equity [Abstract]" } } }, "localname": "EquityAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_EquityComponentDomain": { "auth_ref": [ "r183" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossNotes", "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossTables", "http://www.onegas.com/role/EquityDetails", "http://www.onegas.com/role/EquityTables", "http://www.onegas.com/role/StatementOfChangesInEquity" ], "xbrltype": "domainItemType" }, "us-gaap_EquitySecuritiesMember": { "auth_ref": [ "r8", "r15", "r151", "r359", "r372", "r384" ], "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 Securities [Member]" } } }, "localname": "EquitySecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities": { "auth_ref": [ "r278" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 8.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.", "label": "Excess Tax Benefit from Share-based Compensation, Financing Activities", "terseLabel": "Tax withholdings related to net share settlements of stock compensation" } } }, "localname": "ExcessTaxBenefitFromShareBasedCompensationFinancingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ExtinguishmentOfDebtAmount": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Gross amount of debt extinguished.", "label": "Extinguishment of Debt, Amount", "terseLabel": "Extinguishment of Debt, Amount" } } }, "localname": "ExtinguishmentOfDebtAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails" ], "xbrltype": "monetaryItemType" }, "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 Basis [Line Items]" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable": { "auth_ref": [ "r317", "r318", "r319", "r323" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails", "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsNotes" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems": { "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, Balance Sheet Grouping, Financial Statement Captions [Line Items]", "terseLabel": "Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]" } } }, "localname": "FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsNotes" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueByFairValueHierarchyLevelAxis": { "auth_ref": [ "r218", "r220", "r252", "r318", "r348" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails", "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueDisclosuresTextBlock": { "auth_ref": [ "r322" ], "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 Disclosures" } } }, "localname": "FairValueDisclosuresTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueInputsLevel1Member": { "auth_ref": [ "r218", "r220", "r252", "r318", "r349" ], "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": "Fair Value, Inputs, Level 1 [Member]", "verboseLabel": "Level 1 [Member]" } } }, "localname": "FairValueInputsLevel1Member", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails", "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel2Member": { "auth_ref": [ "r218", "r220", "r252", "r318", "r350" ], "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 2 [Member]", "verboseLabel": "Fair Value, Inputs, Level 2 [Member]" } } }, "localname": "FairValueInputsLevel2Member", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails", "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel3Member": { "auth_ref": [ "r218", "r220", "r252", "r318", "r351" ], "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]", "verboseLabel": "Level 3 [Member]" } } }, "localname": "FairValueInputsLevel3Member", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "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 Measurement, Policy [Policy Text Block]" } } }, "localname": "FairValueMeasurementPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPeriodIncreaseDecrease": { "auth_ref": [ "r320" ], "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) 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, Period Increase (Decrease)", "terseLabel": "Net realized and unrealized gains (losses)" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPeriodIncreaseDecrease", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases": { "auth_ref": [ "r321" ], "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": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements": { "auth_ref": [ "r321" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of settlement 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, Settlements", "negatedTerseLabel": "Settlements" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue": { "auth_ref": [ "r320" ], "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": "Level 3 fair value measurement, December 31", "periodStartLabel": "Level 3 fair value measurement, January 1" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": { "auth_ref": [], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails", "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FixedIncomeFundsMember": { "auth_ref": [ "r218" ], "lang": { "en-US": { "role": { "documentation": "Investment that pools funds from investors to invest in a combination of underlying investments, primarily fixed income investments.", "label": "Fixed Income Funds [Member]", "terseLabel": "Fixed Income Funds [Member]" } } }, "localname": "FixedIncomeFundsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_GasDistributionEquipmentMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Long lived, depreciable assets used for the primary purpose of distributing a gas product to the consumer.", "label": "Gas Distribution Equipment [Member]", "terseLabel": "Natural gas distribution pipelines and related equipment" } } }, "localname": "GasDistributionEquipmentMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_GasTransmissionEquipmentMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Long lived, depreciable assets used for the primary purpose of transmitting and distributing gas product to the consumer.", "label": "Gas Transmission Equipment [Member]", "terseLabel": "Natural gas transmission pipelines and related equipment" } } }, "localname": "GasTransmissionEquipmentMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_Goodwill": { "auth_ref": [ "r156", "r158" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 2.0, "parentTag": "ogs_Totalgoodwillandotherassets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.", "label": "Goodwill", "terseLabel": "Goodwill" } } }, "localname": "Goodwill", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock": { "auth_ref": [ "r104", "r160", "r162" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for goodwill and intangible assets. This accounting policy also may address how an entity assesses and measures impairment of goodwill and intangible assets.", "label": "Goodwill and Intangible Assets, Policy [Policy Text Block]", "terseLabel": "Impairment of Goodwill and Long-Lived Assets" } } }, "localname": "GoodwillAndIntangibleAssetsPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_GoodwillImpairmentLoss": { "auth_ref": [ "r94", "r157", "r159", "r161" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.", "label": "Goodwill, Impairment Loss", "terseLabel": "Goodwill, Impairment Loss" } } }, "localname": "GoodwillImpairmentLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest": { "auth_ref": [ "r74", "r113", "r352", "r361", "r382" ], "calculation": { "http://www.onegas.com/role/StatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.", "label": "Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest", "terseLabel": "Income before income taxes", "totalLabel": "Income before income taxes" } } }, "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeStatementAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Income Statement [Abstract]" } } }, "localname": "IncomeStatementAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Income Tax Disclosure [Abstract]" } } }, "localname": "IncomeTaxDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxDisclosureTextBlock": { "auth_ref": [ "r311" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.", "label": "Income Tax Disclosure [Text Block]", "verboseLabel": "INCOME TAXES" } } }, "localname": "IncomeTaxDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_IncomeTaxEffectsAllocatedDirectlyToEquityCumulativeEffectOfChangeInAccountingPrinciple": { "auth_ref": [ "r308" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cumulative tax effect on beginning retained earnings from change in accounting principle.", "label": "Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle", "terseLabel": "Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle" } } }, "localname": "IncomeTaxEffectsAllocatedDirectlyToEquityCumulativeEffectOfChangeInAccountingPrinciple", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementOfChangesInEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxExpenseBenefit": { "auth_ref": [ "r107", "r139", "r309" ], "calculation": { "http://www.onegas.com/role/StatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": -1.0 } }, "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)", "negatedLabel": "Income taxes", "terseLabel": "Income tax provision" } } }, "localname": "IncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Effective Income Tax Rate Reconciliation, Amount [Abstract]", "terseLabel": "Income Tax Reconciliation [Abstract]" } } }, "localname": "IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxPolicyTextBlock": { "auth_ref": [ "r70", "r104", "r285", "r286", "r292", "r293", "r298", "r310", "r387" ], "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": "Income Taxes" } } }, "localname": "IncomeTaxPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate": { "auth_ref": [ "r106", "r290", "r291" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.", "label": "Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount", "terseLabel": "Provision for federal income taxes" } } }, "localname": "IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationOtherAdjustments": { "auth_ref": [ "r290" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.", "label": "Effective Income Tax Rate Reconciliation, Other Adjustments, Amount", "terseLabel": "Other, net" } } }, "localname": "IncomeTaxReconciliationOtherAdjustments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes": { "auth_ref": [ "r106", "r290", "r291" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit).", "label": "Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount", "terseLabel": "State income taxes, net of federal benefit" } } }, "localname": "IncomeTaxReconciliationStateAndLocalIncomeTaxes", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxesPaidNet": { "auth_ref": [ "r99" ], "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, net of any cash received during the current period as refunds for the overpayment of taxes.", "label": "Income Taxes Paid, Net", "terseLabel": "Cash received for income taxes, net" } } }, "localname": "IncomeTaxesPaidNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInAccountsPayable": { "auth_ref": [ "r93" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 5.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.", "label": "Increase (Decrease) in Accounts Payable", "terseLabel": "Accounts payable" } } }, "localname": "IncreaseDecreaseInAccountsPayable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInCustomerDeposits": { "auth_ref": [ "r93" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 12.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the period in the amount of customer money held in customer accounts, including security deposits, collateral for a current or future transactions, initial payment of the cost of acquisition or for the right to enter into a contract or agreement.", "label": "Increase (Decrease) in Customer Deposits", "terseLabel": "Customer deposits" } } }, "localname": "IncreaseDecreaseInCustomerDeposits", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInDeferredIncomeTaxes": { "auth_ref": [ "r93" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the account that represents the temporary difference that results from Income or Loss that is recognized for accounting purposes but not for tax purposes and vice versa.", "label": "Increase (Decrease) in Deferred Income Taxes", "terseLabel": "Deferred income taxes" } } }, "localname": "IncreaseDecreaseInDeferredIncomeTaxes", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInInventories": { "auth_ref": [ "r93" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 6.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.", "label": "Increase (Decrease) in Inventories", "negatedLabel": "Natural gas in storage" } } }, "localname": "IncreaseDecreaseInInventories", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInMaterialsAndSupplies": { "auth_ref": [ "r93" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 1.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the period in the carrying amount of capitalized costs of materials, supplies, or both, which are not included in inventory.", "label": "Increase (Decrease) in Materials and Supplies", "negatedTerseLabel": "Materials and supplies" } } }, "localname": "IncreaseDecreaseInMaterialsAndSupplies", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOperatingCapitalAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Increase (Decrease) in Operating Capital [Abstract]", "terseLabel": "Changes in assets and liabilities:" } } }, "localname": "IncreaseDecreaseInOperatingCapitalAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet": { "auth_ref": [ "r93" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 4.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in operating assets after deduction of operating liabilities classified as other.", "label": "Increase (Decrease) in Other Operating Assets and Liabilities, Net", "negatedLabel": "Other assets and liabilities" } } }, "localname": "IncreaseDecreaseInOtherOperatingCapitalNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations": { "auth_ref": [ "r93" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 2.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in obligation for pension and other postretirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans.", "label": "Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits", "terseLabel": "Employee benefit obligation" } } }, "localname": "IncreaseDecreaseInPensionAndPostretirementObligations", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInPropertyAndOtherTaxesPayable": { "auth_ref": [ "r93" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 11.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the period in the amount of cash payments due to taxing authorities for non-income-related taxes.", "label": "Increase (Decrease) in Property and Other Taxes Payable", "terseLabel": "Accrued taxes other than income" } } }, "localname": "IncreaseDecreaseInPropertyAndOtherTaxesPayable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInReceivables": { "auth_ref": [ "r93" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 7.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the total amount due within one year (or one operating cycle) from all parties, associated with underlying transactions that are classified as operating activities.", "label": "Increase (Decrease) in Receivables", "negatedLabel": "Accounts receivable" } } }, "localname": "IncreaseDecreaseInReceivables", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInRegulatoryAssetsAndLiabilities": { "auth_ref": [ "r93" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 13.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the value of assets that are created when regulatory agencies permits public utilities to defer costs (revenues) to the balance sheet. This element is a the increase (decrease) of regulatory assets and liabilities combined.", "label": "Increase (Decrease) in Regulatory Assets and Liabilities", "negatedTerseLabel": "Regulatory assets and liabilities" } } }, "localname": "IncreaseDecreaseInRegulatoryAssetsAndLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestCostsCapitalized": { "auth_ref": [ "r325" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of interest capitalized during the period.", "label": "Interest Costs Capitalized", "terseLabel": "Interest costs capitalized" } } }, "localname": "InterestCostsCapitalized", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestExpense": { "auth_ref": [ "r72", "r138", "r324", "r328", "r364" ], "calculation": { "http://www.onegas.com/role/StatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest", "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", "negatedLabel": "Interest expense, net" } } }, "localname": "InterestExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestPaidNet": { "auth_ref": [ "r89", "r91", "r99" ], "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": "Interest Paid, Excluding Capitalized Interest, Operating Activities" } } }, "localname": "InterestPaidNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_InventoryPolicyTextBlock": { "auth_ref": [ "r6", "r51", "r104", "r126", "r154", "r155" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of inventory accounting policy for inventory classes, including, but not limited to, basis for determining inventory amounts, methods by which amounts are added and removed from inventory classes, loss recognition on impairment of inventories, and situations in which inventories are stated above cost.", "label": "Inventory, Policy [Policy Text Block]", "terseLabel": "Inventories" } } }, "localname": "InventoryPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_LandBuildingsAndImprovementsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Real estate held and additions or improvements to real estate held and structures used in the conduct of business.", "label": "Land, Buildings and Improvements [Member]", "terseLabel": "General plant and other" } } }, "localname": "LandBuildingsAndImprovementsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_LeaseAndRentalExpense": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.", "label": "Operating Leases, Rent Expense", "terseLabel": "Operating Leases, Rent Expense" } } }, "localname": "LeaseAndRentalExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LeasesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Leases [Abstract]" } } }, "localname": "LeasesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_LesseeLeaseDescriptionLineItems": { "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": "Lessee, Lease, Description [Line Items]", "terseLabel": "Lessee, Lease, Description [Line Items]" } } }, "localname": "LesseeLeaseDescriptionLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LesseeLeaseDescriptionTable": { "auth_ref": [ "r338" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of information about lessee's leases.", "label": "Lessee, Lease, Description [Table]", "terseLabel": "Lessee, Lease, Description [Table]" } } }, "localname": "LesseeLeaseDescriptionTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LesseeLeasesPolicyTextBlock": { "auth_ref": [ "r336" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for leasing arrangement entered into by lessee.", "label": "Lessee, Leases [Policy Text Block]", "terseLabel": "Lessee, Leases [Policy Text Block]" } } }, "localname": "LesseeLeasesPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock": { "auth_ref": [ "r343" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.", "label": "Lessee, Operating Lease, Liability, Maturity [Table Text Block]", "terseLabel": "Lessee, Operating Lease, Liability, Maturity [Table Text Block]" } } }, "localname": "LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue": { "auth_ref": [ "r343" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease.", "label": "Lessee, Operating Lease, Liability, Payments, Due", "terseLabel": "Lessee, Operating Lease, Liability, Payments, Due" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive": { "auth_ref": [ "r343" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due after fifth fiscal year following latest fiscal year.", "label": "Lessee, Operating Lease, Liability, Payments, Due after Year Five", "terseLabel": "Lessee, Operating Lease, Liability, Payments, Due after Year Five" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths": { "auth_ref": [ "r343" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in next fiscal year following latest fiscal year.", "label": "Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months", "terseLabel": "Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive": { "auth_ref": [ "r343" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fifth fiscal year following latest fiscal year.", "label": "Lessee, Operating Lease, Liability, Payments, Due Year Five", "terseLabel": "Lessee, Operating Lease, Liability, Payments, Due Year Five" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFive", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour": { "auth_ref": [ "r343" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fourth fiscal year following latest fiscal year.", "label": "Lessee, Operating Lease, Liability, Payments, Due Year Four", "terseLabel": "Lessee, Operating Lease, Liability, Payments, Due Year Four" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFour", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree": { "auth_ref": [ "r343" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in third fiscal year following latest fiscal year.", "label": "Lessee, Operating Lease, Liability, Payments, Due Year Three", "terseLabel": "Lessee, Operating Lease, Liability, Payments, Due Year Three" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearThree", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo": { "auth_ref": [ "r343" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in second fiscal year following latest fiscal year.", "label": "Lessee, Operating Lease, Liability, Payments, Due Year Two", "terseLabel": "Lessee, Operating Lease, Liability, Payments, Due Year Two" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearTwo", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount": { "auth_ref": [ "r343" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.", "label": "Lessee, Operating Lease, Liability, Undiscounted Excess Amount", "negatedTerseLabel": "Lessee, Operating Lease, Liability, Undiscounted Excess Amount" } } }, "localname": "LesseeOperatingLeaseLiabilityUndiscountedExcessAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseOptionToExtend": { "auth_ref": [ "r337" ], "lang": { "en-US": { "role": { "documentation": "Description of terms and conditions of option to extend lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability.", "label": "Lessee, Operating Lease, Option to Extend", "terseLabel": "Lessee, Operating Lease, Option to Extend" } } }, "localname": "LesseeOperatingLeaseOptionToExtend", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LesseeOperatingLeaseTermOfContract": { "auth_ref": [ "r337" ], "lang": { "en-US": { "role": { "documentation": "Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Lessee, Operating Lease, Term of Contract", "terseLabel": "Lessee, Operating Lease, Term of Contract" } } }, "localname": "LesseeOperatingLeaseTermOfContract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "durationItemType" }, "us-gaap_LesseeOperatingLeasesTextBlock": { "auth_ref": [ "r345" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability.", "label": "Lessee, Operating Leases [Text Block]", "terseLabel": "Lessee, Operating Leases [Text Block]" } } }, "localname": "LesseeOperatingLeasesTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_LettersOfCreditOutstandingAmount": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.", "label": "Letters of Credit Outstanding, Amount", "terseLabel": "Letters of Credit Outstanding, Amount" } } }, "localname": "LettersOfCreditOutstandingAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesAndStockholdersEquity": { "auth_ref": [ "r29", "r358", "r377" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "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 equity" } } }, "localname": "LiabilitiesAndStockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesAndStockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Liabilities and Equity [Abstract]", "terseLabel": "Equity and Liabilities" } } }, "localname": "LiabilitiesAndStockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilitiesCurrent": { "auth_ref": [ "r41" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 2.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.", "label": "Liabilities, Current", "totalLabel": "Total current liabilities" } } }, "localname": "LiabilitiesCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesCurrentAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Liabilities, Current [Abstract]", "verboseLabel": "Current liabilities" } } }, "localname": "LiabilitiesCurrentAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilitiesNoncurrentAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Liabilities, Noncurrent [Abstract]", "terseLabel": "Deferred credits and other liabilities [Abstract]" } } }, "localname": "LiabilitiesNoncurrentAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilityForUncertainTaxPositionsCurrent": { "auth_ref": [ "r40" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount recognized for uncertainty in income taxes classified as current.", "label": "Liability for Uncertainty in Income Taxes, Current", "terseLabel": "Liability for Uncertainty in Income Taxes, Current" } } }, "localname": "LiabilityForUncertainTaxPositionsCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LineOfCreditFacilityAxis": { "auth_ref": [ "r38", "r109" ], "lang": { "en-US": { "role": { "documentation": "Information by name of lender, which may be a single entity (for example, but not limited to, a bank, pension fund, venture capital firm) or a group of entities that participate in the line of credit.", "label": "Lender Name [Axis]", "terseLabel": "Lender Name [Axis]" } } }, "localname": "LineOfCreditFacilityAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LineOfCreditFacilityCommitmentFeeDescription": { "auth_ref": [ "r38" ], "lang": { "en-US": { "role": { "documentation": "Description of the fees for amounts available, but unused under the credit facility.", "label": "Line of Credit Facility, Commitment Fee Description", "terseLabel": "Line of Credit Facility, Commitment Fee Description" } } }, "localname": "LineOfCreditFacilityCommitmentFeeDescription", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LineOfCreditFacilityExpirationDate1": { "auth_ref": [ "r38" ], "lang": { "en-US": { "role": { "documentation": "Date the credit facility terminates, in CCYY-MM-DD format.", "label": "Line of Credit Facility, Expiration Date", "terseLabel": "Line of Credit Facility, Expiration Date" } } }, "localname": "LineOfCreditFacilityExpirationDate1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "dateItemType" }, "us-gaap_LineOfCreditFacilityInterestRateDescription": { "auth_ref": [ "r38" ], "lang": { "en-US": { "role": { "documentation": "Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).", "label": "Line of Credit Facility, Interest Rate Description", "terseLabel": "Line of Credit Facility, Interest Rate Description" } } }, "localname": "LineOfCreditFacilityInterestRateDescription", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LineOfCreditFacilityLenderDomain": { "auth_ref": [ "r38" ], "lang": { "en-US": { "role": { "documentation": "Identification of the lender, which may be a single entity (for example, a bank, pension fund, venture capital firm) or a group of entities that participate in the line of credit, including a letter of credit facility.", "label": "Line of Credit Facility, Lender [Domain]", "terseLabel": "Line of Credit Facility, Lender [Domain]" } } }, "localname": "LineOfCreditFacilityLenderDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "domainItemType" }, "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity": { "auth_ref": [ "r38" ], "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": "Line of Credit Facility, Maximum Borrowing Capacity" } } }, "localname": "LineOfCreditFacilityMaximumBorrowingCapacity", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity": { "auth_ref": [ "r38" ], "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": "Line of Credit Facility, Remaining Borrowing Capacity" } } }, "localname": "LineOfCreditFacilityRemainingBorrowingCapacity", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LineOfCreditFacilityTable": { "auth_ref": [ "r38", "r109" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "stringItemType" }, "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": "Line of Credit [Member]" } } }, "localname": "LineOfCreditMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "domainItemType" }, "us-gaap_LongTermDebt": { "auth_ref": [ "r17", "r177", "r357", "r375" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.", "label": "Long-term Debt", "terseLabel": "Long-term Debt" } } }, "localname": "LongTermDebt", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongTermDebtAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Long-term Debt, Unclassified [Abstract]" } } }, "localname": "LongTermDebtAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "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": "Long-term Debt, Fair Value" } } }, "localname": "LongTermDebtFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/DerivativeFinancialInstrumentsAndFairValueMeasurementsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongTermDebtNoncurrent": { "auth_ref": [ "r44" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 2.0, "parentTag": "us-gaap_CapitalizationLongtermDebtAndEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.", "label": "Long-term Debt, Excluding Current Maturities", "verboseLabel": "Long-term debt, excluding current maturities, and net of issuance costs of $10,936 and $11,457, respectively" } } }, "localname": "LongTermDebtNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongTermDebtTextBlock": { "auth_ref": [ "r178" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for long-term debt.", "label": "Long-term Debt [Text Block]", "terseLabel": "Long-term Debt [Text Block]" } } }, "localname": "LongTermDebtTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LongTermDebtNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_LongtermDebtTypeAxis": { "auth_ref": [ "r44" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails", "http://www.onegas.com/role/LongTermDebtDetails", "http://www.onegas.com/role/LongTermDebtNotes" ], "xbrltype": "stringItemType" }, "us-gaap_LongtermDebtTypeDomain": { "auth_ref": [ "r44", "r174" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails", "http://www.onegas.com/role/LongTermDebtDetails", "http://www.onegas.com/role/LongTermDebtNotes" ], "xbrltype": "domainItemType" }, "us-gaap_LossOnReacquiredDebtMember": { "auth_ref": [ "r390", "r394" ], "lang": { "en-US": { "role": { "documentation": "Rate action of a regulator resulting in capitalization or accrual of loss incurred on reacquisition or refinancing of debt.", "label": "Loss on Reacquired Debt [Member]", "terseLabel": "Reacquired debt costs [Member]" } } }, "localname": "LossOnReacquiredDebtMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_MaterialsSuppliesAndOther": { "auth_ref": [], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 2.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The carrying amount of capitalized costs of materials, supplies, and other assets, which are not included in inventory but used in production.", "label": "Materials, Supplies, and Other", "terseLabel": "Materials and supplies" } } }, "localname": "MaterialsSuppliesAndOther", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInFinancingActivities": { "auth_ref": [ "r90" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 1.0, "parentTag": "us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease", "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": "Cash provided by (used in) financing activities" } } }, "localname": "NetCashProvidedByUsedInFinancingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]", "terseLabel": "Financing activities" } } }, "localname": "NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInInvestingActivities": { "auth_ref": [ "r90" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 2.0, "parentTag": "us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.", "label": "Net Cash Provided by (Used in) Investing Activities", "totalLabel": "Cash used in investing activities" } } }, "localname": "NetCashProvidedByUsedInInvestingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]", "terseLabel": "Investing activities" } } }, "localname": "NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInOperatingActivities": { "auth_ref": [ "r90", "r92", "r95" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 3.0, "parentTag": "us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease", "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": "Cash provided by operating activities" } } }, "localname": "NetCashProvidedByUsedInOperatingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]", "terseLabel": "Operating activities" } } }, "localname": "NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetIncomeLoss": { "auth_ref": [ "r64", "r67", "r75", "r95", "r122", "r362", "r380" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 15.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 }, "http://www.onegas.com/role/StatementsOfComprehensiveIncomeStatementsOfComprehensiveIncome": { "order": 1.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax", "weight": 1.0 }, "http://www.onegas.com/role/StatementsOfIncome": { "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.", "label": "Net Income (Loss) Attributable to Parent", "terseLabel": "Net income", "totalLabel": "Net income" } } }, "localname": "NetIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EarningsPerShareDetails", "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedDetails", "http://www.onegas.com/role/StatementOfChangesInEquity", "http://www.onegas.com/role/StatementsOfCashFlows", "http://www.onegas.com/role/StatementsOfComprehensiveIncomeStatementsOfComprehensiveIncome", "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted": { "auth_ref": [ "r115", "r116" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.", "label": "Net Income (Loss) Available to Common Stockholders, Diluted", "terseLabel": "Net Income (Loss) Available to Common Stockholders, Diluted" } } }, "localname": "NetIncomeLossAvailableToCommonStockholdersDiluted", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EarningsPerShareDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent": { "auth_ref": [ "r201" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of expense (reversal of expense) for net periodic benefit cost components, excluding service cost component, of defined benefit plan. Amount includes, but is not limited to, interest cost, expected (return) loss on plan asset, amortization of prior service cost (credit), amortization of (gain) loss, amortization of transition (asset) obligation, settlement (gain) loss, curtailment (gain) loss and certain termination benefits.", "label": "Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component", "terseLabel": "Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component" } } }, "localname": "NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/OtherIncomeAndExpenseDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetRegulatoryAssets": { "auth_ref": [ "r391" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The net amount of all regulatory assets less all regulatory liabilities as of the end of the period.", "label": "Net Regulatory Assets", "terseLabel": "Net Regulatory Assets" } } }, "localname": "NetRegulatoryAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "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": "Recently Issues Accounting Standards Updates" } } }, "localname": "NewAccountingPronouncementsPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_OperatingExpensesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Operating Expenses [Abstract]", "verboseLabel": "Operating expenses" } } }, "localname": "OperatingExpensesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_OperatingIncomeLoss": { "auth_ref": [], "calculation": { "http://www.onegas.com/role/StatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The net result for the period of deducting operating expenses from operating revenues.", "label": "Operating Income (Loss)", "terseLabel": "Operating income", "totalLabel": "Operating income" } } }, "localname": "OperatingIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedDetails", "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseExpense": { "auth_ref": [ "r334" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of operating lease expense. Excludes sublease income.", "label": "Operating Lease, Expense", "terseLabel": "Operating Lease, Expense" } } }, "localname": "OperatingLeaseExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiability": { "auth_ref": [ "r333" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease.", "label": "Operating Lease, Liability", "terseLabel": "Operating Lease, Liability" } } }, "localname": "OperatingLeaseLiability", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails", "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiabilityCurrent": { "auth_ref": [ "r333" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.", "label": "Operating Lease, Liability, Current", "terseLabel": "Operating Lease, Liability, Current" } } }, "localname": "OperatingLeaseLiabilityCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiabilityNoncurrent": { "auth_ref": [ "r333" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.", "label": "Operating Lease, Liability, Noncurrent", "terseLabel": "Operating Lease, Liability, Noncurrent" } } }, "localname": "OperatingLeaseLiabilityNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasePayments": { "auth_ref": [ "r335", "r339" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.", "label": "Operating Lease, Payments", "negatedTerseLabel": "Operating Lease, Payments" } } }, "localname": "OperatingLeasePayments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseRightOfUseAsset": { "auth_ref": [ "r332" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's right to use underlying asset under operating lease.", "label": "Operating Lease, Right-of-Use Asset", "terseLabel": "Operating Lease, Right-of-Use Asset" } } }, "localname": "OperatingLeaseRightOfUseAsset", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails", "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent": { "auth_ref": [ "r342", "r344" ], "lang": { "en-US": { "role": { "documentation": "Weighted average discount rate for operating lease calculated at point in time.", "label": "Operating Lease, Weighted Average Discount Rate, Percent", "terseLabel": "Operating Lease, Weighted Average Discount Rate, Percent" } } }, "localname": "OperatingLeaseWeightedAverageDiscountRatePercent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "percentItemType" }, "us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1": { "auth_ref": [ "r341", "r344" ], "lang": { "en-US": { "role": { "documentation": "Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Operating Lease, Weighted Average Remaining Lease Term", "terseLabel": "Operating Lease, Weighted Average Remaining Lease Term" } } }, "localname": "OperatingLeaseWeightedAverageRemainingLeaseTerm1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "durationItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDue": { "auth_ref": [ "r330", "r331" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.", "label": "Operating Leases, Future Minimum Payments Due", "terseLabel": "Operating Leases, Future Minimum Payments Due" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears": { "auth_ref": [ "r330", "r331" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments, Due in Five Years", "terseLabel": "Operating Leases, Future Minimum Payments, Due in Five Years" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInFiveYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears": { "auth_ref": [ "r330", "r331" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments, Due in Four Years", "terseLabel": "Operating Leases, Future Minimum Payments, Due in Four Years" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInFourYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears": { "auth_ref": [ "r330", "r331" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments, Due in Three Years", "terseLabel": "Operating Leases, Future Minimum Payments, Due in Three Years" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInThreeYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears": { "auth_ref": [ "r330", "r331" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments, Due in Two Years", "terseLabel": "Operating Leases, Future Minimum Payments, Due in Two Years" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInTwoYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter": { "auth_ref": [ "r330", "r331" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments, Due Thereafter", "terseLabel": "Operating Leases, Future Minimum Payments, Due Thereafter" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueThereafter", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLossCarryforwardsExpirationDate": { "auth_ref": [ "r299" ], "lang": { "en-US": { "role": { "documentation": "Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYY-MM-DD format.", "label": "Operating Loss Carryforwards, Expiration Date", "terseLabel": "Operating Loss Carryforwards, Expiration Date" } } }, "localname": "OperatingLossCarryforwardsExpirationDate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "dateItemType" }, "us-gaap_OtherAssetsCurrent": { "auth_ref": [ "r52" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 6.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of current assets classified as other.", "label": "Other Assets, Current", "terseLabel": "Other current assets" } } }, "localname": "OtherAssetsCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherAssetsNoncurrent": { "auth_ref": [ "r36" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 3.0, "parentTag": "ogs_Totalgoodwillandotherassets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of noncurrent assets classified as other.", "label": "Other Assets, Noncurrent", "terseLabel": "Other assets" } } }, "localname": "OtherAssetsNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax": { "auth_ref": [ "r60", "r71" ], "calculation": { "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails": { "order": 1.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax, before reclassification adjustments of other comprehensive income (loss).", "label": "Other Comprehensive Income (Loss), before Reclassifications, Net of Tax", "terseLabel": "Other comprehensive income (loss), before reclassification, net of tax" } } }, "localname": "OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [ "r65", "r68", "r71", "r183" ], "calculation": { "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.onegas.com/role/StatementsOfComprehensiveIncomeStatementsOfComprehensiveIncome": { "order": 2.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax and reclassification adjustments of other comprehensive income (loss).", "label": "Other Comprehensive Income (Loss), Net of Tax", "terseLabel": "Other comprehensive loss", "totalLabel": "Other comprehensive income (loss), net of tax" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.onegas.com/role/StatementOfChangesInEquity", "http://www.onegas.com/role/StatementsOfComprehensiveIncomeStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Other Comprehensive Income (Loss), Net of Tax [Abstract]", "terseLabel": "Other Comprehensive Income (Loss), Net of Tax [Abstract]" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfComprehensiveIncomeStatementsOfComprehensiveIncome" ], "xbrltype": "stringItemType" }, "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax": { "auth_ref": [ "r55", "r57" ], "calculation": { "http://www.onegas.com/role/StatementsOfComprehensiveIncomeStatementsOfComprehensiveIncome": { "order": 1.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.", "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax", "negatedLabel": "Total recognized in other comprehensive income (loss)", "negatedTerseLabel": "Change in pension and other postretirement benefit plans liability, net of tax of $479, $(848), and $486, respectively" } } }, "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails", "http://www.onegas.com/role/StatementsOfComprehensiveIncomeStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax": { "auth_ref": [ "r54", "r57", "r231" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, before tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.", "label": "Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax", "terseLabel": "Net loss arising during the period" } } }, "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax": { "auth_ref": [ "r55", "r58", "r312" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.", "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax", "terseLabel": "Pension and other postretirement benefit plans, Tax" } } }, "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfComprehensiveIncomeParentheticals" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax": { "auth_ref": [ "r57", "r61", "r62" ], "calculation": { "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails": { "order": 1.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, before tax, of reclassification adjustment from accumulated other comprehensive (income) loss for net period benefit cost (credit) of defined benefit plan.", "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax", "negatedTotalLabel": "Other comprehensive income (loss) reclassification adjustment, before tax" } } }, "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax": { "auth_ref": [ "r57", "r61", "r62", "r231" ], "calculation": { "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after tax, of reclassification adjustment from accumulated other comprehensive (income) loss for net periodic benefit cost (credit) of defined benefit plan.", "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax", "negatedTotalLabel": "Other comprehensive income (loss) reclassification adjustment, net of tax" } } }, "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax": { "auth_ref": [ "r58", "r312" ], "calculation": { "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails": { "order": 2.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of tax (expense) benefit for reclassification adjustment from accumulated other comprehensive (income) loss of defined benefit plan.", "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax", "terseLabel": "Other comprehensive income (loss) reclassification adjustment, Tax" } } }, "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherIncomeAndExpensesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Other Income and Expenses [Abstract]" } } }, "localname": "OtherIncomeAndExpensesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_OtherIncomeAndOtherExpenseDisclosureTextBlock": { "auth_ref": [ "r195", "r282" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions.", "label": "Other Income and Other Expense Disclosure [Text Block]", "terseLabel": "Other Income and Other Expense Disclosure [Text Block]" } } }, "localname": "OtherIncomeAndOtherExpenseDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/OtherIncomeAndExpenseNotes", "http://www.onegas.com/role/OtherIncomeAndExpenseTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_OtherInvestmentsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Primary financial statement caption encompassing other investments.", "label": "Other Investments [Member]", "terseLabel": "Other Investments [Member]" } } }, "localname": "OtherInvestmentsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_OtherLiabilitiesCurrent": { "auth_ref": [ "r3", "r4", "r40" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 6.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer.", "label": "Other Liabilities, Current", "terseLabel": "Other current liabilities" } } }, "localname": "OtherLiabilitiesCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherLiabilitiesNoncurrent": { "auth_ref": [ "r45" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 4.0, "parentTag": "ogs_TotalDeferredCreditsAndOtherLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.", "label": "Other Liabilities, Noncurrent", "terseLabel": "Other deferred credits" } } }, "localname": "OtherLiabilitiesNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherNonoperatingExpense": { "auth_ref": [ "r79" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of expense related to nonoperating activities, classified as other.", "label": "Other Nonoperating Expense", "terseLabel": "Other Nonoperating Expense" } } }, "localname": "OtherNonoperatingExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/OtherIncomeAndExpenseDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherNonoperatingIncomeExpense": { "auth_ref": [ "r79" ], "calculation": { "http://www.onegas.com/role/StatementsOfIncome": { "order": 3.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of income (expense) related to nonoperating activities, classified as other.", "label": "Other Nonoperating Income (Expense)", "negatedLabel": "Other Nonoperating Income (Expense)", "terseLabel": "Other expense, net" } } }, "localname": "OtherNonoperatingIncomeExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/OtherIncomeAndExpenseDetails", "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember": { "auth_ref": [ "r198", "r241", "r242", "r257" ], "lang": { "en-US": { "role": { "documentation": "Plan designed to provide other postretirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans. Excludes pension benefits.", "label": "Other Postretirement Benefits Plan [Member]", "terseLabel": "Other Postretirement Benefits Plan [Member]" } } }, "localname": "OtherPostretirementBenefitPlansDefinedBenefitMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails", "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "domainItemType" }, "us-gaap_PaymentsForProceedsFromOtherInvestingActivities": { "auth_ref": [ "r81", "r83", "r111" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 4.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash (inflow) outflow from investing activities classified as other.", "label": "Payments for (Proceeds from) Other Investing Activities", "negatedTerseLabel": "Payments for (Proceeds from) Other Investing Activities" } } }, "localname": "PaymentsForProceedsFromOtherInvestingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsForRemovalCosts": { "auth_ref": [ "r82" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 14.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Cash outflow related to disposal costs of plants, whether by demolishing, dismantling, abandoning, sale, and so forth during the period.", "label": "Payments for Removal Costs", "negatedTerseLabel": "Asset removal costs" } } }, "localname": "PaymentsForRemovalCosts", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsForRepurchaseOfCommonStock": { "auth_ref": [ "r86" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 2.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow to reacquire common stock during the period.", "label": "Payments for Repurchase of Common Stock", "negatedTerseLabel": "Repurchase of common stock" } } }, "localname": "PaymentsForRepurchaseOfCommonStock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsOfDividends": { "auth_ref": [ "r86" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 7.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.", "label": "Payments of Dividends", "negatedTerseLabel": "Dividends paid" } } }, "localname": "PaymentsOfDividends", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsOfFinancingCosts": { "auth_ref": [ "r88" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 4.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow for loan and debt issuance costs.", "label": "Payments of Financing Costs", "terseLabel": "Payments of Financing Costs" } } }, "localname": "PaymentsOfFinancingCosts", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireAssetsInvestingActivities": { "auth_ref": [ "r83" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 2.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Aggregate cash payments for a combination of transactions that are classified as investing activities in which assets, which may include securities, other types of investments, or productive assets, are purchased from third-party sellers. This element can be used by entities to aggregate payments for all asset purchases that are classified as investing activities.", "label": "Payments to Acquire Assets, Investing Activities", "negatedTerseLabel": "Payments to Acquire Assets, Investing Activities" } } }, "localname": "PaymentsToAcquireAssetsInvestingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment": { "auth_ref": [ "r82" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 1.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.", "label": "Payments to Acquire Property, Plant, and Equipment", "negatedLabel": "Capital expenditures" } } }, "localname": "PaymentsToAcquirePropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock": { "auth_ref": [ "r259" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for pension and other postretirement benefits.", "label": "Pension and Other Postretirement Benefits Disclosure [Text Block]", "terseLabel": "Pension and Other Postemployment Benefits Disclosure [Text Block]" } } }, "localname": "PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities": { "auth_ref": [ "r16", "r199", "r200", "r215" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current.", "label": "Liability, Defined Benefit Plan, Current", "negatedTerseLabel": "Current liabilities" } } }, "localname": "PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent": { "auth_ref": [ "r18", "r199", "r200", "r215" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 3.0, "parentTag": "ogs_TotalDeferredCreditsAndOtherLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent.", "label": "Liability, Defined Benefit Plan, Noncurrent", "negatedTerseLabel": "Noncurrent liabilities", "verboseLabel": "Employee benefit obligations" } } }, "localname": "PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansNoncurrentLiabilitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Liability, Defined Benefit Plan [Abstract]", "terseLabel": "Pension and other postretirement benefit plans obligations [Abstract]" } } }, "localname": "PensionAndOtherPostretirementDefinedBenefitPlansNoncurrentLiabilitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PensionAndOtherPostretirementPlansPolicy": { "auth_ref": [ "r104", "r241", "r254", "r255", "r257", "r258" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for pension and other postretirement benefit plans. This accounting policy may address (1) the types of plans sponsored by the entity, and the benefits provided by each plan (2) groups that participate in (or are covered by) each plan (3) how plan assets, liabilities and expenses are measured, including the use of any actuaries and (4) significant assumptions used by the entity to value plan assets and liabilities and how such assumptions are derived.", "label": "Pension and Other Postretirement Plans, Policy [Policy Text Block]", "terseLabel": "Pension and Other Postretirement Plans" } } }, "localname": "PensionAndOtherPostretirementPlansPolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_PensionCostsMember": { "auth_ref": [ "r395" ], "lang": { "en-US": { "role": { "documentation": "Rate action of a regulator resulting in capitalization or accrual of pension costs.", "label": "Pension Costs [Member]", "terseLabel": "Pension and postretirement benefit costs [Member]" } } }, "localname": "PensionCostsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PensionPlansDefinedBenefitMember": { "auth_ref": [ "r197", "r241", "r242", "r257" ], "lang": { "en-US": { "role": { "documentation": "Plan designed to provide participant with pension benefits. Includes, but is not limited to, defined benefit and defined contribution plans. Excludes other postretirement benefits.", "label": "Pension Plan [Member]", "terseLabel": "Pension Plan [Member]" } } }, "localname": "PensionPlansDefinedBenefitMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails", "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "domainItemType" }, "us-gaap_PerformanceSharesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Share-based payment arrangement awarded for meeting performance target.", "label": "Performance Shares [Member]", "terseLabel": "Performance Unit Awards [Member]" } } }, "localname": "PerformanceSharesMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PlanAssetCategoriesDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Defined benefit plan asset investment.", "label": "Defined Benefit Plan, Plan Assets, Category [Domain]", "terseLabel": "Defined Benefit Plan, Plan Assets, Category [Domain]" } } }, "localname": "PlanAssetCategoriesDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PreferredStockParOrStatedValuePerShare": { "auth_ref": [ "r22" ], "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 or Stated Value Per Share" } } }, "localname": "PreferredStockParOrStatedValuePerShare", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EquityDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_PreferredStockSharesAuthorized": { "auth_ref": [ "r22" ], "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" } } }, "localname": "PreferredStockSharesAuthorized", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EquityDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ProceedsFromIssuanceOfCommonStock": { "auth_ref": [ "r84" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 5.0, "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": "Issuance of common stock" } } }, "localname": "ProceedsFromIssuanceOfCommonStock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromIssuanceOfLongTermDebt": { "auth_ref": [ "r85" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 3.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.", "label": "Proceeds from Issuance of Long-term Debt", "terseLabel": "Proceeds from Issuance of Long-term Debt" } } }, "localname": "ProceedsFromIssuanceOfLongTermDebt", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromRepaymentsOfCommercialPaper": { "auth_ref": [ "r85", "r87", "r97" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 1.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The net cash inflow or cash outflow from issuing (borrowing) and repaying commercial paper.", "label": "Proceeds from (Repayments of) Commercial Paper", "terseLabel": "Borrowings (repayment) on notes payable, net" } } }, "localname": "ProceedsFromRepaymentsOfCommercialPaper", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSaleOfOtherAssetsInvestingActivities": { "auth_ref": [ "r81" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 3.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash inflow from the sale of other assets recognized in investing activities.", "label": "Proceeds from Sale of Other Assets, Investing Activities", "terseLabel": "Proceeds from Sale of Other Assets, Investing Activities" } } }, "localname": "ProceedsFromSaleOfOtherAssetsInvestingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Property, Plant and Equipment [Abstract]" } } }, "localname": "PropertyPlantAndEquipmentAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentByTypeAxis": { "auth_ref": [ "r35", "r165" ], "lang": { "en-US": { "role": { "documentation": "Information by type of long-lived, physical assets used to produce goods and services and not intended for resale.", "label": "Property, Plant and Equipment, Type [Axis]", "terseLabel": "Property, Plant and Equipment, Type [Axis]" } } }, "localname": "PropertyPlantAndEquipmentByTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock": { "auth_ref": [ "r166" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.", "label": "Property, Plant and Equipment Disclosure [Text Block]", "verboseLabel": "PROPERTY, PLANT AND EQUIPMENT" } } }, "localname": "PropertyPlantAndEquipmentDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentNotes" ], "xbrltype": "textBlockItemType" }, "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentNetAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Property, Plant and Equipment, Net [Abstract]", "terseLabel": "Property, plant and equipment" } } }, "localname": "PropertyPlantAndEquipmentNetAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentPolicyTextBlock": { "auth_ref": [ "r34", "r104", "r165" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, basis of assets, depreciation and depletion methods used, including composite deprecation, estimated useful lives, capitalization policy, accounting treatment for costs incurred for repairs and maintenance, capitalized interest and the method it is calculated, disposals and impairments.", "label": "Property, Plant and Equipment, Policy [Policy Text Block]", "terseLabel": "Property, Plant and Equipment" } } }, "localname": "PropertyPlantAndEquipmentPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_PropertyPlantAndEquipmentTextBlock": { "auth_ref": [ "r10", "r165" ], "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": "Property, Plant and Equipment by Property Type" } } }, "localname": "PropertyPlantAndEquipmentTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_PropertyPlantAndEquipmentTypeDomain": { "auth_ref": [ "r10", "r164" ], "lang": { "en-US": { "role": { "documentation": "Listing of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.", "label": "Property, Plant and Equipment, Type [Domain]", "terseLabel": "Property, Plant and Equipment, Type [Domain]" } } }, "localname": "PropertyPlantAndEquipmentTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ProvisionForDoubtfulAccounts": { "auth_ref": [ "r77", "r153" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 10.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of expense (reversal of expense) for expected credit loss on accounts receivable.", "label": "Accounts Receivable, Credit Loss Expense (Reversal)", "terseLabel": "Provision for doubtful accounts" } } }, "localname": "ProvisionForDoubtfulAccounts", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PublicUtilitiesInventory": { "auth_ref": [ "r32" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 4.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The period end amount for a type of inventory held by the utility in a schedule of inventories.", "label": "Public Utilities, Inventory", "terseLabel": "Natural gas in storage" } } }, "localname": "PublicUtilitiesInventory", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_PublicUtilitiesPolicyTextBlock": { "auth_ref": [ "r104", "r388" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for public utilities. Examples include a discussion about the scope criteria and appropriateness for and extent of the application of generally accepted accounting principles related to accounting for the effects of certain types of regulation (may include identification of specific business units). Other examples of the disclosures may include: descriptions of the form and economic effects of regulation (for example, but not limited to, recording of regulatory assets and liabilities to the rate setting process); statement about periodic assessments of periodic assessments of generally accepted accounting principles related to accounting for the effects of certain types of regulation; information regarding amortization of and return on regulatory assets and liabilities, including the remaining amounts and recovery or settlement periods; accounting for changes to recovery estimates; AFUDC, plant abandonment's and plant disallowances.", "label": "Public Utilities, Policy [Policy Text Block]", "terseLabel": "Regulation" } } }, "localname": "PublicUtilitiesPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation": { "auth_ref": [], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 1.0, "parentTag": "us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Period end book value of accumulated depreciation on property, plant and equipment (PPE) that is owned by the regulated operations of the public utility.", "label": "Public Utilities, Property, Plant and Equipment, Accumulated Depreciation", "negatedLabel": "Accumulated depreciation and amortization", "verboseLabel": "Accumulated depreciation and amortization" } } }, "localname": "PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet": { "auth_ref": [], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 1.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Period end amount of total net PPE.", "label": "Public Utilities, Property, Plant and Equipment, Net", "terseLabel": "Net property, plant and equipment", "totalLabel": "Net property, plant and equipment" } } }, "localname": "PublicUtilitiesPropertyPlantAndEquipmentNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService": { "auth_ref": [], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 2.0, "parentTag": "us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Period end amount of total gross PPE.", "label": "Public Utilities, Property, Plant and Equipment, Plant in Service", "terseLabel": "Property, plant and equipment" } } }, "localname": "PublicUtilitiesPropertyPlantAndEquipmentPlantInService", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis": { "auth_ref": [ "r9", "r389" ], "lang": { "en-US": { "role": { "documentation": "Information by status (regulated or unregulated) of the public utility.", "label": "Regulation Status [Axis]", "terseLabel": "Regulation Status [Axis]" } } }, "localname": "PublicUtilityRegulatedOrUnregulatedStatusAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails", "http://www.onegas.com/role/PropertyPlantAndEquipmentTables" ], "xbrltype": "stringItemType" }, "us-gaap_QuarterlyFinancialDataAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Quarterly Financial Data [Abstract]" } } }, "localname": "QuarterlyFinancialDataAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_QuarterlyFinancialInformationTextBlock": { "auth_ref": [ "r128" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information.", "label": "Quarterly Financial Information [Text Block]", "verboseLabel": "QUARTERLY FINANCIAL DATA (UNAUDITED)" } } }, "localname": "QuarterlyFinancialInformationTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_RatioOfIndebtednessToNetCapital1": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Indebtedness divided by net capital.", "label": "Ratio of Indebtedness to Net Capital", "terseLabel": "Ratio of Indebtedness to Net Capital" } } }, "localname": "RatioOfIndebtednessToNetCapital1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "pureItemType" }, "us-gaap_ReceivablesNetCurrent": { "auth_ref": [ "r24", "r31", "r378", "r383" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 3.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.", "label": "Receivables, Net, Current", "terseLabel": "Accounts receivable, net" } } }, "localname": "ReceivablesNetCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax": { "auth_ref": [ "r60", "r63", "r71" ], "calculation": { "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails": { "order": 2.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount after tax of reclassification adjustments of other comprehensive income (loss).", "label": "Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax", "negatedTerseLabel": "Amounts reclassified from accumulated other comprehensive income (loss), net of tax" } } }, "localname": "ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss).", "label": "Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]", "terseLabel": "Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]" } } }, "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_RegulatedAndUnregulatedOperationDomain": { "auth_ref": [ "r389" ], "lang": { "en-US": { "role": { "documentation": "Operations of companies, both regulated and unregulated.", "label": "Regulated and Unregulated Operation [Domain]", "terseLabel": "Regulated and Unregulated Operation [Domain]" } } }, "localname": "RegulatedAndUnregulatedOperationDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails", "http://www.onegas.com/role/PropertyPlantAndEquipmentTables" ], "xbrltype": "domainItemType" }, "us-gaap_RegulatedOperatingRevenue": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The total amount of regulated operating revenues recognized during the period.", "label": "Regulated Operating Revenue", "terseLabel": "Regulated Operating Revenue" } } }, "localname": "RegulatedOperatingRevenue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/RevenueDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RegulatedOperatingRevenueGas": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The amount of regulated gas operating revenues recognized during the period.", "label": "Regulated Operating Revenue, Gas", "terseLabel": "Revenues", "verboseLabel": "Regulated Operating Revenue, Gas" } } }, "localname": "RegulatedOperatingRevenueGas", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedDetails", "http://www.onegas.com/role/RevenueDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RegulatedOperatingRevenueOther": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The amount of regulated other operating revenues recognized during the period.", "label": "Regulated Operating Revenue, Other", "terseLabel": "Regulated Operating Revenue, Other" } } }, "localname": "RegulatedOperatingRevenueOther", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/RevenueDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RegulatedOperationMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Operation of entities that are regulated by governmental organizations for example, but not limited to, local, state, county, country, or other regulatory organizations.", "label": "Regulated Operation [Member]", "terseLabel": "Regulated [Member]" } } }, "localname": "RegulatedOperationMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails", "http://www.onegas.com/role/PropertyPlantAndEquipmentTables" ], "xbrltype": "domainItemType" }, "us-gaap_RegulatoryAssetAxis": { "auth_ref": [ "r391", "r392", "r395" ], "lang": { "en-US": { "role": { "documentation": "Information by type of regulatory asset.", "label": "Regulatory Asset [Axis]", "terseLabel": "Regulatory Asset [Axis]" } } }, "localname": "RegulatoryAssetAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RegulatoryAssetDomain": { "auth_ref": [ "r391" ], "lang": { "en-US": { "role": { "documentation": "Rate action of a regulator resulting in capitalization of costs incurred.", "label": "Regulatory Asset [Domain]", "terseLabel": "Regulatory Asset [Domain]" } } }, "localname": "RegulatoryAssetDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CommitmentsAndContingenciesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RegulatoryAssets": { "auth_ref": [ "r391" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period.", "label": "Regulatory Assets", "terseLabel": "Regulatory asset for regulated entities", "verboseLabel": "Regulatory Assets" } } }, "localname": "RegulatoryAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RegulatoryAssetsCurrent": { "auth_ref": [ "r391" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 5.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost.", "label": "Regulatory Assets, Current", "terseLabel": "Regulatory assets", "verboseLabel": "Regulatory Assets, Current" } } }, "localname": "RegulatoryAssetsCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RegulatoryAssetsNoncurrent": { "auth_ref": [ "r391" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 1.0, "parentTag": "ogs_Totalgoodwillandotherassets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer.", "label": "Regulatory Assets, Noncurrent", "terseLabel": "Regulatory assets", "verboseLabel": "Regulatory Assets, Noncurrent" } } }, "localname": "RegulatoryAssetsNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/CommitmentsAndContingenciesDetails", "http://www.onegas.com/role/EmployeeBenefitPlansDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RegulatoryLiabilities": { "auth_ref": [ "r393" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period.", "label": "Regulatory Liabilities", "negatedTerseLabel": "Regulatory Liabilities", "terseLabel": "Regulatory Liabilities" } } }, "localname": "RegulatoryLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RegulatoryLiabilityAxis": { "auth_ref": [ "r393" ], "lang": { "en-US": { "role": { "documentation": "Information by type of regulatory liability.", "label": "Regulatory Liability [Axis]", "terseLabel": "Regulatory Liability [Axis]" } } }, "localname": "RegulatoryLiabilityAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RegulatoryLiabilityCurrent": { "auth_ref": [ "r393" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 5.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The amount for the individual regulatory current liability as itemized in a table of regulatory current liabilities as of the end of the period.", "label": "Regulatory Liability, Current", "negatedTerseLabel": "Regulatory Liability, Current", "terseLabel": "Regulatory liabilities" } } }, "localname": "RegulatoryLiabilityCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RegulatoryLiabilityDomain": { "auth_ref": [ "r393" ], "lang": { "en-US": { "role": { "documentation": "Rate action of a regulator resulting in accrual of costs or expenses.", "label": "Regulatory Liability [Domain]", "terseLabel": "Regulatory Liability [Domain]" } } }, "localname": "RegulatoryLiabilityDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RegulatoryLiabilityNoncurrent": { "auth_ref": [ "r45" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 2.0, "parentTag": "ogs_TotalDeferredCreditsAndOtherLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period.", "label": "Regulatory Liability, Noncurrent", "negatedLabel": "Regulatory Liability, Noncurrent", "terseLabel": "Regulatory Liability, Noncurrent" } } }, "localname": "RegulatoryLiabilityNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RepaymentsOfLongTermDebt": { "auth_ref": [ "r87" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 6.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.", "label": "Repayments of Long-term Debt", "negatedTerseLabel": "Repayments of Long-term Debt" } } }, "localname": "RepaymentsOfLongTermDebt", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_RestrictedStockUnitsRSUMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Share instrument which is convertible to stock or an equivalent amount of cash, after a specified period of time or when specified performance conditions are met.", "label": "Restricted Stock Units (RSUs) [Member]", "terseLabel": "Restricted Stock Units (RSUs) [Member]" } } }, "localname": "RestrictedStockUnitsRSUMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RetainedEarningsAccumulatedDeficit": { "auth_ref": [ "r26", "r190", "r376" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 3.0, "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": "Retained earnings" } } }, "localname": "RetainedEarningsAccumulatedDeficit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_RetainedEarningsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.", "label": "Retained Earnings [Member]", "terseLabel": "Retained Earnings [Member]" } } }, "localname": "RetainedEarningsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementOfChangesInEquity" ], "xbrltype": "domainItemType" }, "us-gaap_RetirementPlanTypeAxis": { "auth_ref": [ "r197", "r198", "r241", "r242", "r257" ], "lang": { "en-US": { "role": { "documentation": "Information by type of retirement benefit plan. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.", "label": "Retirement Plan Type [Axis]", "terseLabel": "Retirement Plan Type [Axis]" } } }, "localname": "RetirementPlanTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails", "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "stringItemType" }, "us-gaap_RetirementPlanTypeDomain": { "auth_ref": [ "r197", "r198", "r241", "r242", "r257" ], "lang": { "en-US": { "role": { "documentation": "Type of plan designed to provide participants with retirement benefits. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.", "label": "Retirement Plan Type [Domain]", "terseLabel": "Retirement Plan Type [Domain]" } } }, "localname": "RetirementPlanTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansDetails", "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "domainItemType" }, "us-gaap_RevenueFromContractWithCustomerPolicyTextBlock": { "auth_ref": [ "r105", "r194" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for revenue from contract with customer.", "label": "Revenue from Contract with Customer [Policy Text Block]", "terseLabel": "Revenue from Contract with Customer [Policy Text Block]" } } }, "localname": "RevenueFromContractWithCustomerPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/RevenueRevenueRecognitionPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_RevenueFromContractWithCustomerTextBlock": { "auth_ref": [ "r194" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.", "label": "Revenue from Contract with Customer [Text Block]", "terseLabel": "Revenue [Policy Text Block]" } } }, "localname": "RevenueFromContractWithCustomerTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/RevenueNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_Revenues": { "auth_ref": [ "r73", "r136", "r137", "r141" ], "calculation": { "http://www.onegas.com/role/StatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_OperatingIncomeLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).", "label": "Revenues", "terseLabel": "Revenues" } } }, "localname": "Revenues", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability": { "auth_ref": [ "r340", "r344" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase in right-of-use asset obtained in exchange for operating lease liability.", "label": "Right-of-Use Asset Obtained in Exchange for Operating Lease Liability", "terseLabel": "Right-of-Use Asset Obtained in Exchange for Operating Lease Liability" } } }, "localname": "RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock": { "auth_ref": [ "r60" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the components of accumulated other comprehensive income (loss).", "label": "Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]", "terseLabel": "Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]" } } }, "localname": "ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock": { "auth_ref": [ "r216" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall.", "label": "Schedule of Allocation of Plan Assets [Table Text Block]", "terseLabel": "Schedule of Allocation of Plan Assets [Table Text Block]" } } }, "localname": "ScheduleOfAllocationOfPlanAssetsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfAmountsInAccumulatedOtherComprehensiveIncomeLossToBeRecognizedOverNextFiscalYearTableTextBlock": { "auth_ref": [ "r239" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the amounts related to pension plans and/or other employee benefit plans in accumulated other comprehensive income (loss) expected to be recognized as components of net periodic benefit cost over the next fiscal year, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation.", "label": "Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]", "terseLabel": "Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]" } } }, "localname": "ScheduleOfAmountsInAccumulatedOtherComprehensiveIncomeLossToBeRecognizedOverNextFiscalYearTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock": { "auth_ref": [ "r231" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost.", "label": "Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]", "terseLabel": "Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]" } } }, "localname": "ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfAssumptionsUsedTableTextBlock": { "auth_ref": [ "r233" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate.", "label": "Defined Benefit Plan, Assumptions [Table Text Block]", "terseLabel": "Defined Benefit Plan, Assumptions [Table Text Block]" } } }, "localname": "ScheduleOfAssumptionsUsedTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock": { "auth_ref": [ "r304" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.", "label": "Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]", "terseLabel": "Reconciliation of Income Tax Provision" } } }, "localname": "ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock": { "auth_ref": [ "r297" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.", "label": "Schedule of Deferred Tax Assets and Liabilities [Table Text Block]", "terseLabel": "Schedule of Deferred Tax Assets and Liabilities" } } }, "localname": "ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock": { "auth_ref": [ "r241", "r242", "r243", "r244", "r252" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans.", "label": "Schedule of Defined Benefit Plans Disclosures [Table Text Block]", "terseLabel": "Schedule of Defined Benefit Plans Disclosures [Table Text Block]" } } }, "localname": "ScheduleOfDefinedBenefitPlansDisclosuresTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock": { "auth_ref": [ "r122" ], "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 Earnings Per Share, Basic and Diluted [Table Text Block]" } } }, "localname": "ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EarningsPerShareTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesTableTextBlock": { "auth_ref": [ "r237" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the effect of a one-percentage-point increase and the effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs and the accumulated postretirement benefit obligation for health care benefits.", "label": "Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]", "terseLabel": "Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]" } } }, "localname": "ScheduleOfEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEffectOfSignificantUnobservableInputsChangesInPlanAssetsTableTextBlock": { "auth_ref": [ "r221" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the effect of fair value measurements using significant unobservable inputs (Level 3) on changes in plan assets of pension plans and/or other employee benefit plans for the period.", "label": "Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]", "terseLabel": "Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]" } } }, "localname": "ScheduleOfEffectOfSignificantUnobservableInputsChangesInPlanAssetsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock": { "auth_ref": [ "r290" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.", "label": "Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]", "terseLabel": "Schedule of Effective Income Tax Rate Reconciliation" } } }, "localname": "ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock": { "auth_ref": [ "r142" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information.", "label": "Revenue from External Customers by Products and Services [Table Text Block]", "terseLabel": "Revenues Disaggregated by Source [Table]" } } }, "localname": "ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/RevenueTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock": { "auth_ref": [ "r223" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter.", "label": "Schedule of Expected Benefit Payments [Table Text Block]", "terseLabel": "Schedule of Expected Benefit Payments [Table Text Block]" } } }, "localname": "ScheduleOfExpectedBenefitPaymentsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfHealthCareCostTrendRatesTableTextBlock": { "auth_ref": [ "r236" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the assumed health care cost trend rates for the next year used to measure the expected cost of benefits covered by the plans, including the ultimate trend rate(s) and when that rate is expected to be achieved.", "label": "Schedule of Health Care Cost Trend Rates [Table Text Block]", "terseLabel": "Schedule of Health Care Cost Trend Rates [Table Text Block]" } } }, "localname": "ScheduleOfHealthCareCostTrendRatesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfNetBenefitCostsTableTextBlock": { "auth_ref": [ "r225" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.", "label": "Schedule of Net Benefit Costs [Table Text Block]", "terseLabel": "Schedule of Net Benefit Costs [Table Text Block]" } } }, "localname": "ScheduleOfNetBenefitCostsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfNetPeriodicBenefitCostNotYetRecognizedTableTextBlock": { "auth_ref": [ "r232" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the amounts related to pension plans and/or other employee benefit plans in accumulated other comprehensive income or loss that have not yet been recognized as components of net periodic benefit cost, such as the net gain (loss), net prior service cost or credit, and net transition asset or obligation.", "label": "Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block]", "terseLabel": "Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block]" } } }, "localname": "ScheduleOfNetPeriodicBenefitCostNotYetRecognizedTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock": { "auth_ref": [ "r267" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the changes in outstanding nonvested performance-based units.", "label": "Schedule of Nonvested Performance-based Units Activity [Table Text Block]", "terseLabel": "Schedule of Nonvested Performance-based Units Activity" } } }, "localname": "ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfPropertyPlantAndEquipmentTable": { "auth_ref": [ "r35", "r165" ], "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": "Schedule of Property, Plant and Equipment [Table]" } } }, "localname": "ScheduleOfPropertyPlantAndEquipmentTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/PropertyPlantAndEquipmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock": { "auth_ref": [ "r127" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data.", "label": "Quarterly Financial Information [Table Text Block]", "terseLabel": "Quarterly Financial Data" } } }, "localname": "ScheduleOfQuarterlyFinancialInformationTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/QuarterlyFinancialDataUnauditedTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfRegulatoryAssetsAndLiabilitiesTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for detailed information about regulatory assets and liabilities, including current and noncurrent assets created when regulatory agencies permit the deferral of costs to the balance sheet that would otherwise be required to appear on the company's income statement and would be charged against current expenses or revenues, as well as current and noncurrent liabilities created when regulatory agencies permit.", "label": "Schedule of Regulatory Assets and Liabilities [Text Block]", "terseLabel": "Schedule of Regulatory Assets and Liabilities" } } }, "localname": "ScheduleOfRegulatoryAssetsAndLiabilitiesTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/RegulatoryAssetsAndLiabilitiesNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable": { "auth_ref": [ "r261", "r277" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of information about share-based payment arrangement.", "label": "Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]", "terseLabel": "Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]" } } }, "localname": "ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails", "http://www.onegas.com/role/ShareBasedPaymentsNotes", "http://www.onegas.com/role/ShareBasedPaymentsTables" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.", "label": "Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]", "terseLabel": "Schedule of Share-based Compensation, Restricted Stock Units Activity" } } }, "localname": "ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfShortTermDebtTable": { "auth_ref": [ "r39" ], "lang": { "en-US": { "role": { "documentation": "A table or schedule providing information pertaining to borrowings under which repayment was required in less than twelve months (or normal operating cycle, if longer) after its issuance. It may include: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date and measures of the maximum and average amount outstanding during the period; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation.", "label": "Schedule of Short-term Debt [Table]", "terseLabel": "Schedule of Short-term Debt [Table]" } } }, "localname": "ScheduleOfShortTermDebtTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableNotes" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfStockByClassTable": { "auth_ref": [ "r47", "r108", "r179", "r180", "r182", "r184", "r185", "r186", "r187", "r188", "r189", "r190" ], "lang": { "en-US": { "role": { "documentation": "Schedule detailing information related to equity by class of stock. Class of stock includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. It also includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity.", "label": "Schedule of Stock by Class [Table]", "terseLabel": "Schedule of Stock by Class [Table]" } } }, "localname": "ScheduleOfStockByClassTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EquityNotes" ], "xbrltype": "stringItemType" }, "us-gaap_SegmentReportingPolicyPolicyTextBlock": { "auth_ref": [ "r104" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for segment reporting.", "label": "Segment Reporting, Policy [Policy Text Block]", "terseLabel": "Segments" } } }, "localname": "SegmentReportingPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ShareBasedCompensation": { "auth_ref": [ "r93" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 3.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of noncash expense for share-based payment arrangement.", "label": "Share-based Payment Arrangement, Noncash Expense", "terseLabel": "Share-based compensation expense" } } }, "localname": "ShareBasedCompensation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails", "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1": { "auth_ref": [ "r263" ], "lang": { "en-US": { "role": { "documentation": "Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period", "terseLabel": "Award vesting period" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "durationItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDescription": { "auth_ref": [ "r260", "r262" ], "lang": { "en-US": { "role": { "documentation": "Description of terms of share-based payment arrangement. Includes, but is not limited to, type of award or grantee and reason for issuance.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Description", "terseLabel": "Description" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardDescription", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod": { "auth_ref": [ "r266" ], "lang": { "en-US": { "role": { "documentation": "The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period", "negatedTerseLabel": "Forfeited (in units)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue": { "auth_ref": [ "r271" ], "lang": { "en-US": { "role": { "documentation": "Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value", "terseLabel": "Forfeited (in dollars per unit)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod": { "auth_ref": [ "r269" ], "lang": { "en-US": { "role": { "documentation": "The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period", "terseLabel": "Granted (in units)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue": { "auth_ref": [ "r269" ], "lang": { "en-US": { "role": { "documentation": "The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value", "terseLabel": "Weighted -average grant date fair value (per unit)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber": { "auth_ref": [ "r268" ], "lang": { "en-US": { "role": { "documentation": "The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number", "periodEndLabel": "Nonvested ending balance (in units)", "periodStartLabel": "Nonvested beginning balance (in units)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue": { "auth_ref": [ "r268" ], "lang": { "en-US": { "role": { "documentation": "Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value", "periodEndLabel": "Nonvested ending balance (in dollars per unit)", "periodStartLabel": "Nonvested beginning balance (in dollars per unit)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod": { "auth_ref": [ "r270" ], "lang": { "en-US": { "role": { "documentation": "The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period", "negatedTerseLabel": "Vested (in units)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue": { "auth_ref": [ "r270" ], "lang": { "en-US": { "role": { "documentation": "The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value", "terseLabel": "Vested (in dollars per unit)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate": { "auth_ref": [ "r273" ], "lang": { "en-US": { "role": { "documentation": "The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate", "terseLabel": "Expected dividend yield" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate": { "auth_ref": [ "r272" ], "lang": { "en-US": { "role": { "documentation": "The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate", "terseLabel": "Expected volatility rate" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate": { "auth_ref": [ "r274" ], "lang": { "en-US": { "role": { "documentation": "The risk-free interest rate assumption that is used in valuing an option on its own shares.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate", "terseLabel": "Risk-free interest rate" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "percentItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems": { "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": "Share-based Compensation Arrangement by Share-based Payment Award [Line Items]", "terseLabel": "Share-based Payments [Line Items]" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails", "http://www.onegas.com/role/ShareBasedPaymentsNotes", "http://www.onegas.com/role/ShareBasedPaymentsTables" ], "xbrltype": "stringItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Number of additional shares authorized for issuance under share-based payment arrangement.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized", "terseLabel": "Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant": { "auth_ref": [ "r277" ], "lang": { "en-US": { "role": { "documentation": "The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant", "terseLabel": "Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain": { "auth_ref": [ "r260", "r264" ], "lang": { "en-US": { "role": { "documentation": "Award under share-based payment arrangement.", "label": "Award Type [Domain]", "terseLabel": "Award Type [Domain]" } } }, "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/ShareBasedPaymentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy": { "auth_ref": [ "r104", "r261", "r265" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for award under share-based payment arrangement. Includes, but is not limited to, methodology and assumption used in measuring cost.", "label": "Share-based Payment Arrangement [Policy Text Block]", "terseLabel": "Share-Based Payments" } } }, "localname": "ShareBasedCompensationOptionAndIncentivePlansPolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_SharesIssued": { "auth_ref": [ "r183" ], "lang": { "en-US": { "role": { "documentation": "Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.", "label": "Shares, Issued", "periodEndLabel": "Shares Issued, ending balance", "periodStartLabel": "Shares Issued, beginning balance" } } }, "localname": "SharesIssued", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementOfChangesInEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_ShortTermBorrowings": { "auth_ref": [ "r13", "r355", "r374" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.", "label": "Short-term Debt", "terseLabel": "Short-term Debt" } } }, "localname": "ShortTermBorrowings", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShortTermDebtLineItems": { "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": "Short-term Debt [Line Items]", "terseLabel": "Short-term Debt [Line Items]" } } }, "localname": "ShortTermDebtLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableNotes" ], "xbrltype": "stringItemType" }, "us-gaap_ShortTermDebtTextBlock": { "auth_ref": [ "r178" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for short-term debt.", "label": "Short-term Debt [Text Block]", "terseLabel": "Short-term Debt [Text Block]" } } }, "localname": "ShortTermDebtTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_ShortTermDebtTypeAxis": { "auth_ref": [ "r39" ], "lang": { "en-US": { "role": { "documentation": "Information by type of short-term debt arrangement.", "label": "Short-term Debt, Type [Axis]", "terseLabel": "Short-term Debt, Type [Axis]" } } }, "localname": "ShortTermDebtTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableNotes" ], "xbrltype": "stringItemType" }, "us-gaap_ShortTermDebtTypeDomain": { "auth_ref": [ "r37" ], "lang": { "en-US": { "role": { "documentation": "Type of short-term debt arrangement, such as notes, line of credit, commercial paper, asset-based financing, project financing, letter of credit financing.", "label": "Short-term Debt, Type [Domain]", "terseLabel": "Short-term Debt, Type [Domain]" } } }, "localname": "ShortTermDebtTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/CreditFacilityAndShortTermNotesPayableNotes" ], "xbrltype": "domainItemType" }, "us-gaap_SignificantAccountingPoliciesTextBlock": { "auth_ref": [ "r112" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for all significant accounting policies of the reporting entity.", "label": "Significant Accounting Policies [Text Block]", "terseLabel": "SIGNIFICANT ACCOUNTING POLICIES" } } }, "localname": "SignificantAccountingPoliciesTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_StatementClassOfStockAxis": { "auth_ref": [ "r21", "r22", "r23", "r183" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheetsBalanceSheetsParenthetical", "http://www.onegas.com/role/EquityNotes" ], "xbrltype": "stringItemType" }, "us-gaap_StatementEquityComponentsAxis": { "auth_ref": [ "r50", "r183" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossNotes", "http://www.onegas.com/role/AccumulatedOtherComprehensiveIncomeLossTables", "http://www.onegas.com/role/EquityDetails", "http://www.onegas.com/role/EquityTables", "http://www.onegas.com/role/StatementOfChangesInEquity" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/BalanceSheetsBalanceSheetsParenthetical", "http://www.onegas.com/role/EquityDetails", "http://www.onegas.com/role/EquityTables", "http://www.onegas.com/role/IncomeTaxesDetails", "http://www.onegas.com/role/OtherIncomeAndExpenseDetails", "http://www.onegas.com/role/OtherIncomeAndExpenseNotes", "http://www.onegas.com/role/OtherIncomeAndExpenseTables", "http://www.onegas.com/role/RevenueDetails", "http://www.onegas.com/role/RevenueNotes", "http://www.onegas.com/role/RevenueTables", "http://www.onegas.com/role/StatementOfChangesInEquity", "http://www.onegas.com/role/StatementsOfCashFlows", "http://www.onegas.com/role/StatementsOfComprehensiveIncomeStatementsOfComprehensiveIncome", "http://www.onegas.com/role/StatementsOfIncome" ], "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/2019-01-31", "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/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statement of Comprehensive Income [Abstract]" } } }, "localname": "StatementOfIncomeAndComprehensiveIncomeAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "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/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementTable": { "auth_ref": [], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/BalanceSheetsBalanceSheetsParenthetical", "http://www.onegas.com/role/EquityDetails", "http://www.onegas.com/role/EquityTables", "http://www.onegas.com/role/OtherIncomeAndExpenseDetails", "http://www.onegas.com/role/OtherIncomeAndExpenseNotes", "http://www.onegas.com/role/OtherIncomeAndExpenseTables", "http://www.onegas.com/role/RevenueDetails", "http://www.onegas.com/role/RevenueNotes", "http://www.onegas.com/role/RevenueTables", "http://www.onegas.com/role/StatementOfChangesInEquity", "http://www.onegas.com/role/StatementsOfCashFlows", "http://www.onegas.com/role/StatementsOfComprehensiveIncomeStatementsOfComprehensiveIncome", "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_StockIssuedDuringPeriodSharesNewIssues": { "auth_ref": [ "r22", "r23", "r183", "r190" ], "lang": { "en-US": { "role": { "documentation": "Number of new stock issued during the period.", "label": "Stock Issued During Period, Shares, New Issues", "terseLabel": "Common stock issued, shares" } } }, "localname": "StockIssuedDuringPeriodSharesNewIssues", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementOfChangesInEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_StockIssuedDuringPeriodValueNewIssues": { "auth_ref": [ "r22", "r23", "r183", "r190" ], "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": "Common stock issued, value" } } }, "localname": "StockIssuedDuringPeriodValueNewIssues", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementOfChangesInEquity" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/EquityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquity": { "auth_ref": [ "r23", "r27", "r28", "r149" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 1.0, "parentTag": "us-gaap_CapitalizationLongtermDebtAndEquity", "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", "periodEndLabel": "Equity, ending balance", "periodStartLabel": "Equity, beginning balance", "totalLabel": "Total equity" } } }, "localname": "StockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets", "http://www.onegas.com/role/StatementOfChangesInEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquityNoteDisclosureTextBlock": { "auth_ref": [ "r193" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.", "label": "Stockholders' Equity Note Disclosure [Text Block]", "terseLabel": "Stockholders' Equity Note Disclosure [Text Block]" } } }, "localname": "StockholdersEquityNoteDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EquityNotes" ], "xbrltype": "textBlockItemType" }, "us-gaap_StockholdersEquityPolicyTextBlock": { "auth_ref": [ "r103", "r104", "r181" ], "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": "Treasury Stock" } } }, "localname": "StockholdersEquityPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_SubsequentEventMember": { "auth_ref": [], "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": "Dividend Declared [Member]" } } }, "localname": "SubsequentEventMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EquityDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SubsequentEventTypeAxis": { "auth_ref": [ "r346" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/EquityDetails" ], "xbrltype": "stringItemType" }, "us-gaap_SubsequentEventTypeDomain": { "auth_ref": [ "r346" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/EquityDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SupplementalCashFlowInformationAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Supplemental Cash Flow Information [Abstract]", "terseLabel": "Supplemental cash flow information:" } } }, "localname": "SupplementalCashFlowInformationAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_TaxCutsAndJobsActOf2017DecreaseInDeferredTaxLiabilityDueToTransitionTax": { "auth_ref": [ "r300" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of decrease in deferred tax liability previously recognized attributable to taxable temporary differences from undistributed earnings of foreign subsidiary and other recognized entity now subject to transition tax.", "label": "Tax Cuts and Jobs Act, Decrease in Deferred Tax Liability due to Transition Tax", "terseLabel": "Tax Cuts and Jobs Act, Decrease in Deferred Tax Liability due to Transition Tax" } } }, "localname": "TaxCutsAndJobsActOf2017DecreaseInDeferredTaxLiabilityDueToTransitionTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TaxCutsAndJobsActOf2017MeasurementPeriodAdjustmentIncomeTaxExpenseBenefit": { "auth_ref": [ "r307" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of income tax expense (benefit) for measurement period adjustment from accounting for tax effect pursuant to Tax Cuts and Jobs Act.", "label": "Tax Cuts and Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit)", "terseLabel": "Deferred tax expense, remeasured deferred taxes" } } }, "localname": "TaxCutsAndJobsActOf2017MeasurementPeriodAdjustmentIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TradeAndOtherAccountsReceivablePolicy": { "auth_ref": [ "r143", "r144", "r145", "r146", "r148", "r150" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for accounts receivable.", "label": "Accounts Receivable [Policy Text Block]", "terseLabel": "Accounts Receivable" } } }, "localname": "TradeAndOtherAccountsReceivablePolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_TreasuryStockMember": { "auth_ref": [ "r49", "r191" ], "lang": { "en-US": { "role": { "documentation": "Shares of an entity that have been repurchased by the entity. This stock has no voting rights and receives no dividends. Note that treasury stock may be recorded at its total cost or separately as par (or stated) value and additional paid in capital. Classified within stockholders' equity if nonredeemable or redeemable solely at the option of the issuer. Classified within temporary equity if redemption is outside the control of the issuer.", "label": "Treasury Stock [Member]", "terseLabel": "Treasury Stock [Member]" } } }, "localname": "TreasuryStockMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementOfChangesInEquity" ], "xbrltype": "domainItemType" }, "us-gaap_TreasuryStockShares": { "auth_ref": [ "r49", "r191" ], "lang": { "en-US": { "role": { "documentation": "Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.", "label": "Treasury Stock, Shares", "terseLabel": "Treasury Stock, Shares" } } }, "localname": "TreasuryStockShares", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheetsBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_TreasuryStockValue": { "auth_ref": [ "r49", "r191", "r192" ], "calculation": { "http://www.onegas.com/role/BalanceSheets": { "order": 5.0, "parentTag": "us-gaap_StockholdersEquity", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.", "label": "Treasury Stock, Value", "negatedTerseLabel": "Treasury stock, at cost: 33,103 shares at December 31, 2018" } } }, "localname": "TreasuryStockValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/BalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_TreasuryStockValueAcquiredCostMethod": { "auth_ref": [ "r183", "r190", "r191" ], "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", "negatedTerseLabel": "Repurchase of common stock" } } }, "localname": "TreasuryStockValueAcquiredCostMethod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementOfChangesInEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnbilledReceivablesCurrent": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer.", "label": "Unbilled Receivables, Current", "terseLabel": "Unbilled Receivables, Current" } } }, "localname": "UnbilledReceivablesCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/RevenueDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_UseOfEstimates": { "auth_ref": [ "r129", "r130", "r131", "r132", "r133", "r134", "r135" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_UtilitiesOperatingExpense": { "auth_ref": [ "r78" ], "calculation": { "http://www.onegas.com/role/StatementsOfIncome": { "order": 3.0, "parentTag": "us-gaap_OperatingIncomeLoss", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of operating expense of regulated operation.", "label": "Utilities Operating Expense", "totalLabel": "Total operating expenses" } } }, "localname": "UtilitiesOperatingExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization": { "auth_ref": [ "r78" ], "calculation": { "http://www.onegas.com/role/StatementsOfCashFlows": { "order": 9.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 }, "http://www.onegas.com/role/StatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_UtilitiesOperatingExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of operating expense for depreciation and amortization of regulated operation.", "label": "Utilities Operating Expense, Depreciation and Amortization", "terseLabel": "Depreciation and amortization", "verboseLabel": "Depreciation and amortization" } } }, "localname": "UtilitiesOperatingExpenseDepreciationAndAmortization", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfCashFlows", "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_UtilitiesOperatingExpenseGasAndPetroleumPurchased": { "auth_ref": [ "r78" ], "calculation": { "http://www.onegas.com/role/StatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_OperatingIncomeLoss", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of operating expense for purchased gas and petroleum of regulated operation.", "label": "Utilities Operating Expense, Gas and Petroleum Purchased", "terseLabel": "Cost of natural gas" } } }, "localname": "UtilitiesOperatingExpenseGasAndPetroleumPurchased", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations": { "auth_ref": [ "r78" ], "calculation": { "http://www.onegas.com/role/StatementsOfIncome": { "order": 3.0, "parentTag": "us-gaap_UtilitiesOperatingExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of operating expense for routine plant maintenance, repairs and operations of regulated operation.", "label": "Utilities Operating Expense, Maintenance and Operations", "verboseLabel": "Operations and maintenance" } } }, "localname": "UtilitiesOperatingExpenseMaintenanceAndOperations", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_UtilitiesOperatingExpenseTaxes": { "auth_ref": [ "r78" ], "calculation": { "http://www.onegas.com/role/StatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_UtilitiesOperatingExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of operating expense for taxes other than income taxes of regulated operation.", "label": "Utilities Operating Expense, Taxes", "terseLabel": "General taxes" } } }, "localname": "UtilitiesOperatingExpenseTaxes", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails", "http://www.onegas.com/role/LongTermDebtNotes" ], "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/2019-01-31", "presentation": [ "http://www.onegas.com/role/LongTermDebtDetails", "http://www.onegas.com/role/LongTermDebtNotes" ], "xbrltype": "domainItemType" }, "us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment": { "auth_ref": [ "r120" ], "lang": { "en-US": { "role": { "documentation": "The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.", "label": "Weighted Average Number Diluted Shares Outstanding Adjustment", "terseLabel": "Weighted Average Number Diluted Shares Outstanding Adjustment" } } }, "localname": "WeightedAverageNumberDilutedSharesOutstandingAdjustment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EarningsPerShareDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding": { "auth_ref": [ "r116", "r120" ], "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": "Diluted", "verboseLabel": "Weighted Average Number of Shares Outstanding, Diluted" } } }, "localname": "WeightedAverageNumberOfDilutedSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EarningsPerShareDetails", "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "sharesItemType" }, "us-gaap_WeightedAverageNumberOfSharesOutstandingBasic": { "auth_ref": [ "r114", "r120" ], "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", "terseLabel": "Basic", "verboseLabel": "Weighted Average Number of Shares Outstanding, Basic" } } }, "localname": "WeightedAverageNumberOfSharesOutstandingBasic", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.onegas.com/role/EarningsPerShareDetails", "http://www.onegas.com/role/StatementsOfIncome" ], "xbrltype": "sharesItemType" } }, "unitCount": 5 } }, "std_ref": { "r0": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765" }, "r1": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765" }, "r10": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(13))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r100": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586" }, "r101": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586" }, "r102": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586" }, "r103": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18726-107790" }, "r104": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790" }, "r105": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18823-107790" }, "r106": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(h)(2))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r107": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(h))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r108": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(d),(e))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r109": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(e),(f))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r11": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(19)(a)(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r110": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(n)(7))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r111": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.12-04(a))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690" }, "r112": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "235", "URI": "http://asc.fasb.org/topic&trid=2122369" }, "r113": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794" }, "r114": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1448-109256" }, "r115": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1377-109256" }, "r116": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1505-109256" }, "r117": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1252-109256" }, "r118": { "Name": "Accounting Standards Codification", "Paragraph": "60B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=SL5780133-109256" }, "r119": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1337-109256" }, "r12": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(19)(a)(3))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r120": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r121": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r122": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r123": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257" }, "r124": { "Name": "Accounting Standards Codification", "Paragraph": "52", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117327953&loc=d3e4984-109258" }, "r125": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "260", "URI": "http://asc.fasb.org/topic&trid=2144383" }, "r126": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "270", "URI": "http://asc.fasb.org/extlink&oid=116846552&loc=d3e543-108305" }, "r127": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "270", "URI": "http://asc.fasb.org/extlink&oid=118952077&loc=d3e1280-108306" }, "r128": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "270", "URI": "http://asc.fasb.org/topic&trid=2126967" }, "r129": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592" }, "r13": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(19)(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r130": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592" }, "r131": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6161-108592" }, "r132": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6191-108592" }, "r133": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6061-108592" }, "r134": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6132-108592" }, "r135": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6143-108592" }, "r136": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r137": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r138": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r139": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r14": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(19))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r140": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r141": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599" }, "r142": { "Name": "Accounting Standards Codification", "Paragraph": "40", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e9031-108599" }, "r143": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e4975-111524" }, "r144": { "Name": "Accounting Standards Codification", "Paragraph": "11B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524" }, "r145": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524" }, "r146": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5033-111524" }, "r147": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524" }, "r148": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5093-111524" }, "r149": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 4.E)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707" }, "r15": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(2))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r150": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=84159169&loc=d3e10133-111534" }, "r151": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "320", "URI": "http://asc.fasb.org/topic&trid=2196928" }, "r152": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=118955202&loc=SL82895884-210446" }, "r153": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447" }, "r154": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "330", "URI": "http://asc.fasb.org/extlink&oid=116847112&loc=d3e4492-108314" }, "r155": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "330", "URI": "http://asc.fasb.org/extlink&oid=116847112&loc=d3e4556-108314" }, "r156": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266" }, "r157": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=99380562&loc=d3e13777-109266" }, "r158": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975" }, "r159": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(e)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267" }, "r16": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(20))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r160": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267" }, "r161": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267" }, "r162": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275" }, "r163": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228" }, "r164": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r165": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r166": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "360", "URI": "http://asc.fasb.org/topic&trid=2155823" }, "r167": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "410", "URI": "http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849" }, "r168": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "440", "URI": "http://asc.fasb.org/topic&trid=2144648" }, "r169": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "450", "URI": "http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349" }, "r17": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(22))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r170": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "450", "URI": "http://asc.fasb.org/extlink&oid=118942415&loc=d3e14615-108349" }, "r171": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "20", "Subparagraph": "(SAB TOPIC 5.Y.Q2)", "Topic": "450", "URI": "http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751" }, "r172": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "450", "URI": "http://asc.fasb.org/topic&trid=2127136" }, "r173": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "460", "URI": "http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249" }, "r174": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=6802200&loc=SL6230698-112601" }, "r175": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(1)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870" }, "r176": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(2)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870" }, "r177": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(3)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870" }, "r178": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "470", "URI": "http://asc.fasb.org/topic&trid=2208564" }, "r179": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(CFRR 211.02)", "Topic": "480", "URI": "http://asc.fasb.org/extlink&oid=65877616&loc=d3e177068-122764" }, "r18": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(24))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r180": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=65888546&loc=d3e21300-112643" }, "r181": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21459-112644" }, "r182": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21553-112644" }, "r183": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644" }, "r184": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644" }, "r185": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21484-112644" }, "r186": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21488-112644" }, "r187": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644" }, "r188": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644" }, "r189": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644" }, "r19": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(26)(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r190": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.3-04)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770" }, "r191": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655" }, "r192": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656" }, "r193": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "505", "URI": "http://asc.fasb.org/topic&trid=2208762" }, "r194": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "606", "URI": "http://asc.fasb.org/topic&trid=49130388" }, "r195": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "610", "URI": "http://asc.fasb.org/topic&trid=49130413" }, "r196": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "705", "URI": "http://asc.fasb.org/topic&trid=2122478" }, "r197": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "15", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "712", "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664" }, "r198": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "15", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "712", "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664" }, "r199": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919" }, "r2": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6801-107765" }, "r20": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(26)(b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r200": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=109237824&loc=d3e1731-114919" }, "r201": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=109237824&loc=SL108413299-114919" }, "r202": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r203": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r204": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(10)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r205": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r206": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r207": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(4)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r208": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(6)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r209": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r21": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(27))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r210": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r211": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r212": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(4)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r213": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(5)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r214": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(8)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r215": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r216": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(5)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r217": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(i)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r218": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(ii)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r219": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(iii)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r22": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(28))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r220": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(iv)(01)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r221": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(iv)(02)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r222": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(e)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r223": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(f)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r224": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r225": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r226": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r227": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r228": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r229": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(4)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r23": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(29))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r230": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(5)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r231": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(i)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r232": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(j)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r233": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(k)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r234": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(k)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r235": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(k)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r236": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(l)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r237": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(m)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r238": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(n)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r239": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(s)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r24": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(3))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r240": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(t)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r241": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r242": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2410-114920" }, "r243": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920" }, "r244": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2439-114920" }, "r245": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r246": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r247": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r248": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r249": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(4)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r25": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30)(a)(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r250": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(5)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r251": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r252": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921" }, "r253": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "15", "SubTopic": "30", "Subparagraph": "(a)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927" }, "r254": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=6412939&loc=d3e15145-114933" }, "r255": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "60", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=66047640&loc=d3e39622-114963" }, "r256": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "60", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964" }, "r257": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "70", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942" }, "r258": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "80", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=d3e29149-114947" }, "r259": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "715", "URI": "http://asc.fasb.org/topic&trid=2235017" }, "r26": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30)(a)(3))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r260": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901" }, "r261": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901" }, "r262": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r263": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r264": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a),(g)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r265": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b),(f)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r266": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(iv)(3)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r267": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r268": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(i)-(ii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r269": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(iii)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r27": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r270": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(iii)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r271": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(iii)(3)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r272": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)(2)(ii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r273": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)(2)(iii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r274": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)(2)(iv)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r275": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)(1)(i)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r276": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(i)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r277": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r278": { "Name": "Accounting Standards Codification", "Paragraph": "24", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=118258462&loc=d3e11374-113907" }, "r279": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Subparagraph": "(c)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=109244661&loc=d3e17540-113929" }, "r28": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(31))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r280": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "718", "URI": "http://asc.fasb.org/topic&trid=2228938" }, "r281": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "720", "URI": "http://asc.fasb.org/extlink&oid=6419918&loc=d3e35281-107843" }, "r282": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "720", "URI": "http://asc.fasb.org/topic&trid=2122503" }, "r283": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "25", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=117330534&loc=d3e28680-109314" }, "r284": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "25", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=117330534&loc=d3e28680-109314" }, "r285": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=d3e32247-109318" }, "r286": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=d3e32280-109318" }, "r287": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=d3e31917-109318" }, "r288": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=d3e31931-109318" }, "r289": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=d3e31958-109318" }, "r29": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(32))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r290": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319" }, "r291": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319" }, "r292": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32809-109319" }, "r293": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319" }, "r294": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r295": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r296": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r297": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r298": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32847-109319" }, "r299": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319" }, "r3": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6904-107765" }, "r30": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(4)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r300": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319" }, "r301": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319" }, "r302": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319" }, "r303": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319" }, "r304": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319" }, "r305": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB TOPIC 6.I)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817" }, "r306": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 6.I.7)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817" }, "r307": { "Name": "Accounting Standards Codification", "Paragraph": "2A", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 5.EE.Q2(f))", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=SL116722634-122817" }, "r308": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=109238882&loc=d3e39076-109324" }, "r309": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324" }, "r31": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(4))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r310": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "05", "SubTopic": "30", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=65884525&loc=d3e40913-109327" }, "r311": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "740", "URI": "http://asc.fasb.org/topic&trid=2144680" }, "r312": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683" }, "r313": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c),(3)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r314": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5579240-113959" }, "r315": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959" }, "r316": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959" }, "r317": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r318": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r319": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bb)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r32": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(6)(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r320": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r321": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r322": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r323": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258" }, "r324": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391" }, "r325": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391" }, "r326": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399" }, "r327": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399" }, "r328": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399" }, "r329": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "55", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400" }, "r33": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.1)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r330": { "Name": "Accounting Standards Codification", "Paragraph": "40", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(Note 3)", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697" }, "r331": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717" }, "r332": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977" }, "r333": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977" }, "r334": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918638-209977" }, "r335": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977" }, "r336": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918666-209980" }, "r337": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(3)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980" }, "r338": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980" }, "r339": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(1)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r34": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.13(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r340": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(2)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r341": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(3)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r342": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(4)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r343": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980" }, "r344": { "Name": "Accounting Standards Codification", "Paragraph": "53", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971" }, "r345": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/subtopic&trid=77888251" }, "r346": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "855", "URI": "http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662" }, "r347": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "855", "URI": "http://asc.fasb.org/extlink&oid=6842918&loc=SL6314020-165662" }, "r348": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719" }, "r349": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(1)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719" }, "r35": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.14)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r350": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719" }, "r351": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(3)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719" }, "r352": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "25", "SubTopic": "20", "Topic": "940", "URI": "http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953" }, "r353": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(11))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r354": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(13)(2))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r355": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(13))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r356": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(15)(2))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r357": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(16))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r358": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(23))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r359": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(6))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r36": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.17)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r360": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.17)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r361": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(15))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r362": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(22))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r363": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(23))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r364": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.9)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r365": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "405", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817" }, "r366": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "470", "Subparagraph": "(e)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823" }, "r367": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "470", "Subparagraph": "(g)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823" }, "r368": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "470", "Subparagraph": "e", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823" }, "r369": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "470", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823" }, "r37": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r370": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(15)(b)(2))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r371": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(16))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r372": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(1)(b))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r373": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(12))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r374": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(16)(a)(1))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r375": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(16))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r376": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(23)(a)(4))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r377": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(25))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r378": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(5))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r379": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.(a),19)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r38": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19(b),22(b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r380": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(18))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263" }, "r381": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(19))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263" }, "r382": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(8))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263" }, "r383": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.6-06(3))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=6488278&loc=d3e604059-122996" }, "r384": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-15)", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611379-123010" }, "r385": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "450", "Topic": "954", "URI": "http://asc.fasb.org/extlink&oid=6491354&loc=d3e6049-115624" }, "r386": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "450", "Topic": "954", "URI": "http://asc.fasb.org/extlink&oid=6491354&loc=d3e6052-115624" }, "r387": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "740", "Topic": "954", "URI": "http://asc.fasb.org/extlink&oid=6491622&loc=d3e9504-115650" }, "r388": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "05", "SubTopic": "10", "Topic": "980", "URI": "http://asc.fasb.org/extlink&oid=79984601&loc=d3e39995-110364" }, "r389": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "980", "URI": "http://asc.fasb.org/extlink&oid=84167750&loc=d3e42232-110370" }, "r39": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r390": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "25", "SubTopic": "340", "Topic": "980", "URI": "http://asc.fasb.org/extlink&oid=77907324&loc=d3e43603-110378" }, "r391": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "340", "Topic": "980", "URI": "http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382" }, "r392": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "340", "Topic": "980", "URI": "http://asc.fasb.org/extlink&oid=6499975&loc=d3e44264-110382" }, "r393": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "25", "SubTopic": "405", "Topic": "980", "URI": "http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394" }, "r394": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "40", "SubTopic": "470", "Topic": "980", "URI": "http://asc.fasb.org/extlink&oid=6500971&loc=d3e49673-110406" }, "r395": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "715", "Topic": "980", "URI": "http://asc.fasb.org/extlink&oid=6501251&loc=d3e52485-110419" }, "r396": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b" }, "r397": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b-23" }, "r398": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "d1-1" }, "r399": { "Name": "Forms 10-K, 10-Q, 20-F", "Number": "240", "Publisher": "SEC", "Section": "13", "Subsection": "a-1-" }, "r4": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6911-107765" }, "r40": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.20)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r400": { "Name": "Forms 10-K, 20-F, 40-F", "Number": "240", "Publisher": "SEC", "Section": "15", "Subsection": "d-1" }, "r401": { "Name": "Regulation 12B", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b-2" }, "r402": { "Name": "Regulation S-T", "Number": "232", "Publisher": "SEC", "Section": "405" }, "r41": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.21)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r42": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.22(a)(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r43": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.22(a)(5))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r44": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.22)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r45": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.24)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r46": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.25)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r47": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.28,29)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r48": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.29)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r49": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.29,30)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r5": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6935-107765" }, "r50": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.29-31)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r51": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.6(b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r52": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.8)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r53": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.9)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r54": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(i)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r55": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(i-k)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r56": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r57": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580" }, "r58": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e640-108580" }, "r59": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e681-108580" }, "r6": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766" }, "r60": { "Name": "Accounting Standards Codification", "Paragraph": "14A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580" }, "r61": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e689-108580" }, "r62": { "Name": "Accounting Standards Codification", "Paragraph": "17A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL34724391-108580" }, "r63": { "Name": "Accounting Standards Codification", "Paragraph": "17B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL34724394-108580" }, "r64": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580" }, "r65": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580" }, "r66": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580" }, "r67": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580" }, "r68": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580" }, "r69": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e557-108580" }, "r7": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r70": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116657188&loc=SL116659661-227067" }, "r71": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118951672&loc=d3e1436-108581" }, "r72": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(210.5-03(11))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r73": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(1))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r74": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(10))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r75": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(20))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r76": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(21))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r77": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(5))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r78": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.2(b))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r79": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.9)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r8": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(12))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r80": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "220", "URI": "http://asc.fasb.org/topic&trid=2134417" }, "r81": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585" }, "r82": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585" }, "r83": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585" }, "r84": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585" }, "r85": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585" }, "r86": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585" }, "r87": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585" }, "r88": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585" }, "r89": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3367-108585" }, "r9": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(13)(b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r90": { "Name": "Accounting Standards Codification", "Paragraph": "24", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3521-108585" }, "r91": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585" }, "r92": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585" }, "r93": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585" }, "r94": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585" }, "r95": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585" }, "r96": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3044-108585" }, "r97": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3098-108585" }, "r98": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4273-108586" }, "r99": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586" } }, "version": "2.1" }