<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>342</ContextCount>
  <ElementCount>473</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>118</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>10</UnitCount>
  <MyReports>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>1001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1002 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1003 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/ConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1004 - Statement - Consolidated Statements of Operations and Comprehensive Loss</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveLoss</Role>
      <ShortName>Consolidated Statements of Operations and Comprehensive Loss</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1005 - Statement - Consolidated Statements of Redeemable Noncontrolling Interest, Redeemable Convertible Preferred Stock, and Stockholders' Equity (Deficit)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/ConsolidatedStatementsOfRedeemableNoncontrollingInterestRedeemableConvertiblePreferredStockAndStockholdersEquityDeficit</Role>
      <ShortName>Consolidated Statements of Redeemable Noncontrolling Interest, Redeemable Convertible Preferred Stock, and Stockholders' Equity (Deficit)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1006 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/ConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1007 - Disclosure - Nature of Business and Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NatureOfBusinessAndSignificantAccountingPolicies</Role>
      <ShortName>Nature of Business and Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>1008 - Disclosure - Business Combination</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/BusinessCombination</Role>
      <ShortName>Business Combination</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>1009 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>1010 - Disclosure - Balance Sheet Components</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/BalanceSheetComponents</Role>
      <ShortName>Balance Sheet Components</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>1011 - Disclosure - Acquisitions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/Acquisitions</Role>
      <ShortName>Acquisitions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>1012 - Disclosure - Goodwill and Other Intangible Assets and Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/GoodwillAndOtherIntangibleAssetsAndLiabilities</Role>
      <ShortName>Goodwill and Other Intangible Assets and Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>1013 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/Debt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>1014 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>1015 - Disclosure - Redeemable Convertible Preferred Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/RedeemableConvertiblePreferredStock</Role>
      <ShortName>Redeemable Convertible Preferred Stock</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>1016 - Disclosure - Common Stock and Stockholders' Deficit</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/CommonStockAndStockholdersDeficit</Role>
      <ShortName>Common Stock and Stockholders' Deficit</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>1017 - Disclosure - Noncontrolling Interests</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NoncontrollingInterests</Role>
      <ShortName>Noncontrolling Interests</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>1018 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>1019 - Disclosure - Related-Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/RelatedPartyTransactions</Role>
      <ShortName>Related-Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>1020 - Disclosure - Net Loss Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NetLossPerShare</Role>
      <ShortName>Net Loss Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>1021 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>1022 - Disclosure - Nature of Business and Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NatureOfBusinessAndSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Nature of Business and Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/NatureOfBusinessAndSignificantAccountingPolicies</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>1023 - Disclosure - Nature of Business and Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NatureOfBusinessAndSignificantAccountingPoliciesTables</Role>
      <ShortName>Nature of Business and Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/NatureOfBusinessAndSignificantAccountingPolicies</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>1024 - Disclosure - Business Combination (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/BusinessCombinationTables</Role>
      <ShortName>Business Combination (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/BusinessCombination</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>1025 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/FairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/FairValueMeasurements</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>1026 - Disclosure - Balance Sheet Components (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/BalanceSheetComponentsTables</Role>
      <ShortName>Balance Sheet Components (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/BalanceSheetComponents</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>1027 - Disclosure - Acquisitions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/AcquisitionsTables</Role>
      <ShortName>Acquisitions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/Acquisitions</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>1028 - Disclosure - Goodwill and Other Intangible Assets and Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/GoodwillAndOtherIntangibleAssetsAndLiabilitiesTables</Role>
      <ShortName>Goodwill and Other Intangible Assets and Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/GoodwillAndOtherIntangibleAssetsAndLiabilities</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>1029 - Disclosure - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/DebtTables</Role>
      <ShortName>Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/Debt</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>1030 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/IncomeTaxes</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>1031 - Disclosure - Redeemable Convertible Preferred Stock (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/RedeemableConvertiblePreferredStockTables</Role>
      <ShortName>Redeemable Convertible Preferred Stock (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/RedeemableConvertiblePreferredStock</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>1032 - Disclosure - Common Stock and Stockholders' Deficit (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/CommonStockAndStockholdersDeficitTables</Role>
      <ShortName>Common Stock and Stockholders' Deficit (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/CommonStockAndStockholdersDeficit</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>1033 - Disclosure - Commitments And Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/CommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments And Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>1034 - Disclosure - Net Loss Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NetLossPerShareTables</Role>
      <ShortName>Net Loss Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/NetLossPerShare</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>1035 - Disclosure - Nature of Business and Significant Accounting Policies - SPAC Transaction and Basis of Presentation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NatureOfBusinessAndSignificantAccountingPoliciesSpacTransactionAndBasisOfPresentationDetails</Role>
      <ShortName>Nature of Business and Significant Accounting Policies - SPAC Transaction and Basis of Presentation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>1036 - Disclosure - Nature of Business and Significant Accounting Policies - Contract Liabilities and Deferred Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NatureOfBusinessAndSignificantAccountingPoliciesContractLiabilitiesAndDeferredRevenueDetails</Role>
      <ShortName>Nature of Business and Significant Accounting Policies - Contract Liabilities and Deferred Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>1037 - Disclosure - Nature of Business and Significant Accounting Policies - Remaining Performance Obligations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NatureOfBusinessAndSignificantAccountingPoliciesRemainingPerformanceObligationsDetails</Role>
      <ShortName>Nature of Business and Significant Accounting Policies - Remaining Performance Obligations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>1038 - Disclosure - Nature of Business and Significant Accounting Policies - Disaggregated Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NatureOfBusinessAndSignificantAccountingPoliciesDisaggregatedRevenueDetails</Role>
      <ShortName>Nature of Business and Significant Accounting Policies - Disaggregated Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>1039 - Disclosure - Nature of Business and Significant Accounting Policies - Other Expenses (Income) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NatureOfBusinessAndSignificantAccountingPoliciesOtherExpensesIncomeDetails</Role>
      <ShortName>Nature of Business and Significant Accounting Policies - Other Expenses (Income) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>1040 - Disclosure - Business Combination - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/BusinessCombinationNarrativeDetails</Role>
      <ShortName>Business Combination - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>1041 - Disclosure - Business Combination - Net Proceeds from Reverse Recapitalization with FCAC (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/BusinessCombinationNetProceedsFromReverseRecapitalizationWithFcacDetails</Role>
      <ShortName>Business Combination - Net Proceeds from Reverse Recapitalization with FCAC (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>1042 - Disclosure - Business Combination - Reconciliation of Number Shares of Common Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/BusinessCombinationReconciliationOfNumberSharesOfCommonStockDetails</Role>
      <ShortName>Business Combination - Reconciliation of Number Shares of Common Stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>1043 - Disclosure - Fair Value Measurements - Fair Value Hierarchy for Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/FairValueMeasurementsFairValueHierarchyForAssetsAndLiabilitiesDetails</Role>
      <ShortName>Fair Value Measurements - Fair Value Hierarchy for Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>1044 - Disclosure - Fair Value Measurements - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/FairValueMeasurementsNarrativeDetails</Role>
      <ShortName>Fair Value Measurements - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>1045 - Disclosure - Fair Value Measurements - Changes to Warrant Liability and Contingent Consideration (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/FairValueMeasurementsChangesToWarrantLiabilityAndContingentConsiderationDetails</Role>
      <ShortName>Fair Value Measurements - Changes to Warrant Liability and Contingent Consideration (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>1046 - Disclosure - Balance Sheet Components - Property and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/BalanceSheetComponentsPropertyAndEquipmentDetails</Role>
      <ShortName>Balance Sheet Components - Property and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>1047 - Disclosure - Balance Sheet Components - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/BalanceSheetComponentsNarrativeDetails</Role>
      <ShortName>Balance Sheet Components - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>1048 - Disclosure - Balance Sheet Components - Accrued Expenses and Other Current Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/BalanceSheetComponentsAccruedExpensesAndOtherCurrentLiabilitiesDetails</Role>
      <ShortName>Balance Sheet Components - Accrued Expenses and Other Current Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>1049 - Disclosure - Acquisitions - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/AcquisitionsNarrativeDetails</Role>
      <ShortName>Acquisitions - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>1050 - Disclosure - Acquisitions - Preliminary Fair Value of Assets Acquired and Liabilities Assumed (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/AcquisitionsPreliminaryFairValueOfAssetsAcquiredAndLiabilitiesAssumedDetails</Role>
      <ShortName>Acquisitions - Preliminary Fair Value of Assets Acquired and Liabilities Assumed (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>1051 - Disclosure - Goodwill and Other Intangible Assets and Liabilities - Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/GoodwillAndOtherIntangibleAssetsAndLiabilitiesIntangibleAssetsDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets and Liabilities - Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>1052 - Disclosure - Goodwill and Other Intangible Assets and Liabilities - Goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/GoodwillAndOtherIntangibleAssetsAndLiabilitiesGoodwillDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets and Liabilities - Goodwill (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/GoodwillAndOtherIntangibleAssetsAndLiabilitiesTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>1053 - Disclosure - Goodwill and Other Intangible Assets and Liabilities - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/GoodwillAndOtherIntangibleAssetsAndLiabilitiesNarrativeDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets and Liabilities - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/GoodwillAndOtherIntangibleAssetsAndLiabilitiesTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>1054 - Disclosure - Goodwill and Other Intangible Assets and Liabilities - Estimated Future Amortization Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/GoodwillAndOtherIntangibleAssetsAndLiabilitiesEstimatedFutureAmortizationExpenseDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets and Liabilities - Estimated Future Amortization Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>1055 - Disclosure - Debt - Debt Balances (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/DebtDebtBalancesDetails</Role>
      <ShortName>Debt - Debt Balances (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>1056 - Disclosure - Debt - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/DebtNarrativeDetails</Role>
      <ShortName>Debt - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>1057 - Disclosure - Income Taxes - Components of Income Tax Expense (Benefit) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/IncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetails</Role>
      <ShortName>Income Taxes - Components of Income Tax Expense (Benefit) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>1058 - Disclosure - Income Taxes - Reconciliation of Effective Income Tax Rate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/IncomeTaxesReconciliationOfEffectiveIncomeTaxRateDetails</Role>
      <ShortName>Income Taxes - Reconciliation of Effective Income Tax Rate (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>1059 - Disclosure - Income Taxes - Components of Deferred Tax Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/IncomeTaxesComponentsOfDeferredTaxAssetsAndLiabilitiesDetails</Role>
      <ShortName>Income Taxes - Components of Deferred Tax Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>1060 - Disclosure - Income Taxes - Loss from Operations Before Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/IncomeTaxesLossFromOperationsBeforeIncomeTaxesDetails</Role>
      <ShortName>Income Taxes - Loss from Operations Before Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>1061 - Disclosure - Income Taxes - Net Operating Loss Carryforwards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/IncomeTaxesNetOperatingLossCarryforwardsDetails</Role>
      <ShortName>Income Taxes - Net Operating Loss Carryforwards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>1062 - Disclosure - Income Taxes - Changes in Valuation Allowance for Deferred Tax Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/IncomeTaxesChangesInValuationAllowanceForDeferredTaxAssetsDetails</Role>
      <ShortName>Income Taxes - Changes in Valuation Allowance for Deferred Tax Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>1063 - Disclosure - Income Taxes - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/IncomeTaxesNarrativeDetails</Role>
      <ShortName>Income Taxes - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>1064 - Disclosure - Redeemable Convertible Preferred Stock - Authorized, Issued and Outstanding Shares and Amounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/RedeemableConvertiblePreferredStockAuthorizedIssuedAndOutstandingSharesAndAmountsDetails</Role>
      <ShortName>Redeemable Convertible Preferred Stock - Authorized, Issued and Outstanding Shares and Amounts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>1065 - Disclosure - Redeemable Convertible Preferred Stock - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/RedeemableConvertiblePreferredStockNarrativeDetails</Role>
      <ShortName>Redeemable Convertible Preferred Stock - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>1066 - Disclosure - Common Stock and Stockholders' Deficit - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/CommonStockAndStockholdersDeficitNarrativeDetails</Role>
      <ShortName>Common Stock and Stockholders' Deficit - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>1067 - Disclosure - Common Stock and Stockholders' Deficit - Warrants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/CommonStockAndStockholdersDeficitWarrantsDetails</Role>
      <ShortName>Common Stock and Stockholders' Deficit - Warrants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>1068 - Disclosure - Common Stock and Stockholders' Deficit - Stock Options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/CommonStockAndStockholdersDeficitStockOptionsDetails</Role>
      <ShortName>Common Stock and Stockholders' Deficit - Stock Options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>1069 - Disclosure - Common Stock and Stockholders' Deficit - Restricted Stock Units (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/CommonStockAndStockholdersDeficitRestrictedStockUnitsDetails</Role>
      <ShortName>Common Stock and Stockholders' Deficit - Restricted Stock Units (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>1070 - Disclosure - Common Stock and Stockholders' Deficit - Share-Based Compensation Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/CommonStockAndStockholdersDeficitShareBasedCompensationExpenseDetails</Role>
      <ShortName>Common Stock and Stockholders' Deficit - Share-Based Compensation Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>1071 - Disclosure - Noncontrolling Interests (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NoncontrollingInterestsDetails</Role>
      <ShortName>Noncontrolling Interests (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/NoncontrollingInterests</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>1072 - Disclosure - Commitments and Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/CommitmentsAndContingenciesDetails</Role>
      <ShortName>Commitments and Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/CommitmentsAndContingencies</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>1073 - Disclosure - Related-Party Transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/RelatedPartyTransactionsDetails</Role>
      <ShortName>Related-Party Transactions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sharecare.com/role/RelatedPartyTransactions</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>1074 - Disclosure - Net Loss Per Share - Basic and Diluted Net Loss Per Share Attributable to Common Stockholders (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NetLossPerShareBasicAndDilutedNetLossPerShareAttributableToCommonStockholdersDetails</Role>
      <ShortName>Net Loss Per Share - Basic and Diluted Net Loss Per Share Attributable to Common Stockholders (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>1075 - Disclosure - Net Loss Per Share - Anti-dilutive Common Stock Equivalents (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NetLossPerShareAntiDilutiveCommonStockEquivalentsDetails</Role>
      <ShortName>Net Loss Per Share - Anti-dilutive Common Stock Equivalents (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>1076 - Disclosure - Commitments and Contingencies - Future Minimum Lease Payments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/CommitmentsAndContingenciesFutureMinimumLeasePaymentsDetails</Role>
      <ShortName>Commitments and Contingencies - Future Minimum Lease Payments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>1077 - Disclosure - Commitments and Contingencies - Future Non-cancellable Purchase Obligations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/CommitmentsAndContingenciesFutureNonCancellablePurchaseObligationsDetails</Role>
      <ShortName>Commitments and Contingencies - Future Non-cancellable Purchase Obligations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>1078 - Disclosure - Common Stock and Stockholders' Deficit - Valuation Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/CommonStockAndStockholdersDeficitValuationAssumptionsDetails</Role>
      <ShortName>Common Stock and Stockholders' Deficit - Valuation Assumptions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>1079 - Disclosure - Nature of Business and Significant Accounting Policies - Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NatureOfBusinessAndSignificantAccountingPoliciesIntangibleAssetsDetails</Role>
      <ShortName>Nature of Business and Significant Accounting Policies - Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>1080 - Disclosure - Nature of Business and Significant Accounting Policies - Accounts Receivable and Allowance for Doubtful Accounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NatureOfBusinessAndSignificantAccountingPoliciesAccountsReceivableAndAllowanceForDoubtfulAccountsDetails</Role>
      <ShortName>Nature of Business and Significant Accounting Policies - Accounts Receivable and Allowance for Doubtful Accounts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>1081 - Disclosure - Nature of Business and Significant Accounting Policies - Employee Benefit Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NatureOfBusinessAndSignificantAccountingPoliciesEmployeeBenefitPlanDetails</Role>
      <ShortName>Nature of Business and Significant Accounting Policies - Employee Benefit Plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>1082 - Disclosure - Nature of Business and Significant Accounting Policies - Advertising Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NatureOfBusinessAndSignificantAccountingPoliciesAdvertisingExpenseDetails</Role>
      <ShortName>Nature of Business and Significant Accounting Policies - Advertising Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="d331275dposam.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>1083 - Disclosure - Nature of Business and Significant Accounting Policies - Revenue Recognition (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sharecare.com/role/NatureOfBusinessAndSignificantAccountingPoliciesRevenueRecognitionDetails</Role>
      <ShortName>Nature of Business and Significant Accounting Policies - Revenue Recognition (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="POS AM" original="d331275dposam.htm">d331275dposam.htm</File>
    <File>d331275dex231.htm</File>
    <File>d331275dex51.htm</File>
    <File>shcr-20211231.xsd</File>
    <File>shcr-20211231_cal.xml</File>
    <File>shcr-20211231_def.xml</File>
    <File>shcr-20211231_lab.xml</File>
    <File>shcr-20211231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>g331275g01t04.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="1">http://fasb.org/srt/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy items="1091">http://fasb.org/us-gaap/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy items="8">http://xbrl.sec.gov/dei/2021</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
