<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.20.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>748</ContextCount>
  <ElementCount>603</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>173</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>9</UnitCount>
  <MyReports>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1001000 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/CondensedConsolidatedBalanceSheets</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1001501 - Statement - Condensed Consolidated Balance Sheets Parenthetical</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/CondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets Parenthetical</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1003000 - Statement - Condensed Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/CondensedConsolidatedStatementsOfOperations</Role>
      <ShortName>Condensed Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1004000 - Statement - Condensed Consolidated Statements of Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome</Role>
      <ShortName>Condensed Consolidated Statements of Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1005000 - Statement - Condensed Consolidated Statements of Changes in Shareholder's Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/CondensedConsolidatedStatementsOfChangesInShareholdersEquity</Role>
      <ShortName>Condensed Consolidated Statements of Changes in Shareholder's Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1006000 - Statement - Condensed Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/CondensedConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>2101100 - Disclosure - Business, Basis of Presentation and Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/BusinessBasisOfPresentationAndSignificantAccountingPolicies</Role>
      <ShortName>Business, Basis of Presentation and Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>2102100 - Disclosure - Investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/Investments</Role>
      <ShortName>Investments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2103100 - Disclosure - Derivative Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/DerivativeFinancialInstruments</Role>
      <ShortName>Derivative Financial Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2104100 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2105100 - Disclosure - Deferred Policy Acquisition Costs and Value of Business Acquired</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired</Role>
      <ShortName>Deferred Policy Acquisition Costs and Value of Business Acquired</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2106100 - Disclosure - Guaranteed Benefit Features</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/GuaranteedBenefitFeatures</Role>
      <ShortName>Guaranteed Benefit Features</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2107100 - Disclosure - Reinsurance</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/Reinsurance</Role>
      <ShortName>Reinsurance</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2108100 - Disclosure - Capital Contributions, Dividends and Statutory Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/CapitalContributionsDividendsAndStatutoryInformation</Role>
      <ShortName>Capital Contributions, Dividends and Statutory Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2109100 - Disclosure - Accumulated Other Comprehensive Income (Loss)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/AccumulatedOtherComprehensiveIncomeLoss</Role>
      <ShortName>Accumulated Other Comprehensive Income (Loss)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2110100 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2111100 - Disclosure - Benefit Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/BenefitPlans</Role>
      <ShortName>Benefit Plans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2112100 - Disclosure - Financing Agreements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/FinancingAgreements</Role>
      <ShortName>Financing Agreements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2113100 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2114100 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/RelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2116100 - Schedule - Schedule I. Summary of Investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/ScheduleISummaryOfInvestments</Role>
      <ShortName>Schedule I. Summary of Investments</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2117100 - Schedule - Schedule IV - Reinsurance Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/ScheduleIvReinsuranceInformation</Role>
      <ShortName>Schedule IV - Reinsurance Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2201201 - Disclosure - Business, Basis of Presentation and Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/BusinessBasisOfPresentationAndSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Business, Basis of Presentation and Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2302301 - Disclosure - Investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsTables</Role>
      <ShortName>Investments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.voya.com/role/Investments</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2303301 - Disclosure - Derivative Financial Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/DerivativeFinancialInstrumentsTables</Role>
      <ShortName>Derivative Financial Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.voya.com/role/DerivativeFinancialInstruments</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2304301 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/FairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.voya.com/role/FairValueMeasurements</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2305301 - Disclosure - Deferred Policy Acquisition Costs and Value of Business Acquired (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquiredTables</Role>
      <ShortName>Deferred Policy Acquisition Costs and Value of Business Acquired (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.voya.com/role/DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2307301 - Disclosure - Reinsurance (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/ReinsuranceTables</Role>
      <ShortName>Reinsurance (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.voya.com/role/Reinsurance</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2309301 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/AccumulatedOtherComprehensiveIncomeLossTables</Role>
      <ShortName>Accumulated Other Comprehensive Income (Loss) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.voya.com/role/AccumulatedOtherComprehensiveIncomeLoss</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2310301 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.voya.com/role/IncomeTaxes</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2311301 - Disclosure - Benefit Plans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/BenefitPlansTables</Role>
      <ShortName>Benefit Plans (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.voya.com/role/BenefitPlans</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2313301 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/CommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.voya.com/role/CommitmentsAndContingencies</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2401402 - Disclosure - Business, Basis of Presentation and Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/BusinessBasisOfPresentationAndSignificantAccountingPoliciesDetails</Role>
      <ShortName>Business, Basis of Presentation and Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.voya.com/role/BusinessBasisOfPresentationAndSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2401403 - Disclosure - Business, Basis of Presentation and Significant Accounting Policies Assumptions and Yields (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/BusinessBasisOfPresentationAndSignificantAccountingPoliciesAssumptionsAndYieldsDetails</Role>
      <ShortName>Business, Basis of Presentation and Significant Accounting Policies Assumptions and Yields (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2401404 - Disclosure - Business, Basis of Presentation and Significant Accounting Policies Revenue Recognition (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/BusinessBasisOfPresentationAndSignificantAccountingPoliciesRevenueRecognitionDetails</Role>
      <ShortName>Business, Basis of Presentation and Significant Accounting Policies Revenue Recognition (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2402402 - Disclosure - Investments - Fixed Maturities and Equity Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsFixedMaturitiesAndEquitySecuritiesDetails</Role>
      <ShortName>Investments - Fixed Maturities and Equity Securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2402403 - Disclosure - Investments - Debt Maturities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsDebtMaturitiesDetails</Role>
      <ShortName>Investments - Debt Maturities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2402404 - Disclosure - Investments - Composition of US and Foreign Corporate Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsCompositionOfUsAndForeignCorporateSecuritiesDetails</Role>
      <ShortName>Investments - Composition of US and Foreign Corporate Securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2402405 - Disclosure - Investments - Fixed Maturities and Equity Securities, Repurchase Agreement, Securities Lending, VIEs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsFixedMaturitiesAndEquitySecuritiesRepurchaseAgreementSecuritiesLendingViesDetails</Role>
      <ShortName>Investments - Fixed Maturities and Equity Securities, Repurchase Agreement, Securities Lending, VIEs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2402406 - Disclosure - Investments - Unrealized Capital Losses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsUnrealizedCapitalLossesDetails</Role>
      <ShortName>Investments - Unrealized Capital Losses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2402407 - Disclosure - Investments - Unrealized Capital Losses 1 (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsUnrealizedCapitalLosses1Details</Role>
      <ShortName>Investments - Unrealized Capital Losses 1 (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2402408 - Disclosure - Investments - OTTI (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsOttiDetails</Role>
      <ShortName>Investments - OTTI (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2402409 - Disclosure - Investments - OTTI OCI (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsOttiOciDetails</Role>
      <ShortName>Investments - OTTI OCI (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2402410 - Disclosure - Investments - Troubled Debt Restructuring (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsTroubledDebtRestructuringDetails</Role>
      <ShortName>Investments - Troubled Debt Restructuring (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2402411 - Disclosure - Investments - Mortgage Loans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsMortgageLoansDetails</Role>
      <ShortName>Investments - Mortgage Loans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2402412 - Disclosure - Investments - Allowance for Loan Losses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsAllowanceForLoanLossesDetails</Role>
      <ShortName>Investments - Allowance for Loan Losses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2402413 - Disclosure - Investments - Impaired Loans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsImpairedLoansDetails</Role>
      <ShortName>Investments - Impaired Loans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2402414 - Disclosure - Investments - Loans by Loan to Value Ratio and Debt Service Coverage Ratio (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsLoansByLoanToValueRatioAndDebtServiceCoverageRatioDetails</Role>
      <ShortName>Investments - Loans by Loan to Value Ratio and Debt Service Coverage Ratio (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2402415 - Disclosure - Investments - Loans by U.S. Region (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsLoansByUSRegionDetails</Role>
      <ShortName>Investments - Loans by U.S. Region (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2402416 - Disclosure - Investments - Loans by Property Type (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsLoansByPropertyTypeDetails</Role>
      <ShortName>Investments - Loans by Property Type (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2402417 - Disclosure - Investments - Net Investment Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsNetInvestmentIncomeDetails</Role>
      <ShortName>Investments - Net Investment Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2402418 - Disclosure - Investments - Net Realized Capital Gains (Losses) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/InvestmentsNetRealizedCapitalGainsLossesDetails</Role>
      <ShortName>Investments - Net Realized Capital Gains (Losses) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2403402 - Disclosure - Derivative Financial Instruments - Notional and Fair Values (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/DerivativeFinancialInstrumentsNotionalAndFairValuesDetails</Role>
      <ShortName>Derivative Financial Instruments - Notional and Fair Values (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2403403 - Disclosure - Derivative Financial Instruments - Offsetting Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/DerivativeFinancialInstrumentsOffsettingAssetsAndLiabilitiesDetails</Role>
      <ShortName>Derivative Financial Instruments - Offsetting Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2403404 - Disclosure - Derivative Financial Instruments - Net Realized Gains (Losses) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/DerivativeFinancialInstrumentsNetRealizedGainsLossesDetails</Role>
      <ShortName>Derivative Financial Instruments - Net Realized Gains (Losses) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2403405 - Disclosure - Derivative Financial Instruments - Collateral and Credit Default Swaps (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/DerivativeFinancialInstrumentsCollateralAndCreditDefaultSwapsDetails</Role>
      <ShortName>Derivative Financial Instruments - Collateral and Credit Default Swaps (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2404402 - Disclosure - Fair Value Measurements - Fair Vaue Measurement (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/FairValueMeasurementsFairVaueMeasurementDetails</Role>
      <ShortName>Fair Value Measurements - Fair Vaue Measurement (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2404403 - Disclosure - Fair Value Measurements - Level 3 Financial Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/FairValueMeasurementsLevel3FinancialInstrumentsDetails</Role>
      <ShortName>Fair Value Measurements - Level 3 Financial Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2404404 - Disclosure - Fair Value Measurements - Other Financial Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/FairValueMeasurementsOtherFinancialInstrumentsDetails</Role>
      <ShortName>Fair Value Measurements - Other Financial Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2405402 - Disclosure - Deferred Policy Acquisition Costs and Value of Business Acquired (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquiredDetails</Role>
      <ShortName>Deferred Policy Acquisition Costs and Value of Business Acquired (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.voya.com/role/DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquiredTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2406401 - Disclosure - Guaranteed Benefit Features (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/GuaranteedBenefitFeaturesDetails</Role>
      <ShortName>Guaranteed Benefit Features (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.voya.com/role/GuaranteedBenefitFeatures</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2407402 - Disclosure - - Reinsurance (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/ReinsuranceDetails</Role>
      <ShortName>- Reinsurance (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2407403 - Disclosure - Reinsurance - Net Receivables (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/ReinsuranceNetReceivablesDetails</Role>
      <ShortName>Reinsurance - Net Receivables (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2407404 - Disclosure - Reinsurance - Premiums (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/ReinsurancePremiumsDetails</Role>
      <ShortName>Reinsurance - Premiums (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2408401 - Disclosure - Capital Contributions, Dividends and Statutory Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/CapitalContributionsDividendsAndStatutoryInformationDetails</Role>
      <ShortName>Capital Contributions, Dividends and Statutory Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.voya.com/role/CapitalContributionsDividendsAndStatutoryInformation</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2409402 - Disclosure - Accumulated Other Comprehensive Income (Loss) - Components of AOCI (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/AccumulatedOtherComprehensiveIncomeLossComponentsOfAociDetails</Role>
      <ShortName>Accumulated Other Comprehensive Income (Loss) - Components of AOCI (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.voya.com/role/AccumulatedOtherComprehensiveIncomeLossTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2409403 - Disclosure - Accumulated Other Comprehensive Income (Loss) - Changes in AOCI, including Reclassification Adjustments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/AccumulatedOtherComprehensiveIncomeLossChangesInAociIncludingReclassificationAdjustmentsDetails</Role>
      <ShortName>Accumulated Other Comprehensive Income (Loss) - Changes in AOCI, including Reclassification Adjustments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.voya.com/role/AccumulatedOtherComprehensiveIncomeLossTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2410402 - Disclosure - Income Taxes - Components of Income Tax Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/IncomeTaxesComponentsOfIncomeTaxExpenseDetails</Role>
      <ShortName>Income Taxes - Components of Income Tax Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2410403 - Disclosure - Income Taxes - Income Tax Reconciliation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/IncomeTaxesIncomeTaxReconciliationDetails</Role>
      <ShortName>Income Taxes - Income Tax Reconciliation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>2410404 - Disclosure - Income Taxes - Temporary Differences (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/IncomeTaxesTemporaryDifferencesDetails</Role>
      <ShortName>Income Taxes - Temporary Differences (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>2410405 - Disclosure - Income Taxes - Valuation Allowances (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/IncomeTaxesValuationAllowancesDetails</Role>
      <ShortName>Income Taxes - Valuation Allowances (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>2410406 - Disclosure - Income Taxes - Tax Sharing Agreement (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/IncomeTaxesTaxSharingAgreementDetails</Role>
      <ShortName>Income Taxes - Tax Sharing Agreement (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>2411402 - Disclosure - Benefit Plans - Defined Benefit Plans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/BenefitPlansDefinedBenefitPlansDetails</Role>
      <ShortName>Benefit Plans - Defined Benefit Plans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>2411403 - Disclosure - Benefit Plans - Defined Contribution Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/BenefitPlansDefinedContributionPlanDetails</Role>
      <ShortName>Benefit Plans - Defined Contribution Plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>2411404 - Disclosure - Benefit Plans - Non-Qualified Retirement Plans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/BenefitPlansNonQualifiedRetirementPlansDetails</Role>
      <ShortName>Benefit Plans - Non-Qualified Retirement Plans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>2411405 - Disclosure - Benefit Plans - Obligations and Funded Status (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/BenefitPlansObligationsAndFundedStatusDetails</Role>
      <ShortName>Benefit Plans - Obligations and Funded Status (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>2411406 - Disclosure - Benefit Plans - Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/BenefitPlansAssumptionsDetails</Role>
      <ShortName>Benefit Plans - Assumptions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>2411407 - Disclosure - Benefit Plans - Net Periodic Benefit Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/BenefitPlansNetPeriodicBenefitCostsDetails</Role>
      <ShortName>Benefit Plans - Net Periodic Benefit Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>2411408 - Disclosure - Benefit Plans - Expected Future Benefit Payments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/BenefitPlansExpectedFutureBenefitPaymentsDetails</Role>
      <ShortName>Benefit Plans - Expected Future Benefit Payments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>2411409 - Disclosure - Benefit Plans - Stock Option and Share Plans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/BenefitPlansStockOptionAndSharePlansDetails</Role>
      <ShortName>Benefit Plans - Stock Option and Share Plans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>2412401 - Disclosure - Financing Agreements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/FinancingAgreementsDetails</Role>
      <ShortName>Financing Agreements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.voya.com/role/FinancingAgreements</ParentRole>
      <Position>82</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>2413402 - Disclosure - Commitments and Contingencies - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/CommitmentsAndContingenciesNarrativeDetails</Role>
      <ShortName>Commitments and Contingencies - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>2413403 - Disclosure - Commitments and Contingencies - Restricted Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/CommitmentsAndContingenciesRestrictedAssetsDetails</Role>
      <ShortName>Commitments and Contingencies - Restricted Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>2414401 - Disclosure - Related Party Transactions - Operating Agreements and Investment Advisory and Other Fees (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/RelatedPartyTransactionsOperatingAgreementsAndInvestmentAdvisoryAndOtherFeesDetails</Role>
      <ShortName>Related Party Transactions - Operating Agreements and Investment Advisory and Other Fees (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>2414402 - Disclosure - Related Party Transactions - Reinsurance Agreements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/RelatedPartyTransactionsReinsuranceAgreementsDetails</Role>
      <ShortName>Related Party Transactions - Reinsurance Agreements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>2414403 - Disclosure - Related Party Transactions - Financing Agreements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/RelatedPartyTransactionsFinancingAgreementsDetails</Role>
      <ShortName>Related Party Transactions - Financing Agreements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>2416401 - Schedule - Schedule I. Summary of Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/ScheduleISummaryOfInvestmentsDetails</Role>
      <ShortName>Schedule I. Summary of Investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>2417401 - Schedule - Schedule IV - Reinsurance Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.voya.com/role/ScheduleIvReinsuranceInformationDetails</Role>
      <ShortName>Schedule IV - Reinsurance Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="vriac2019q410-kreport.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9999.htm</HtmlFileName>
      <LongName>Uncategorized Items - vriac2019q410-kreport.htm</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/role/uncategorizedFacts</Role>
      <ShortName>Uncategorized Items - vriac2019q410-kreport.htm</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>90</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="10-K" original="vriac2019q410-kreport.htm">vriac2019q410-kreport.htm</File>
    <File>vriac-20191231.xsd</File>
    <File>vriac-20191231_cal.xml</File>
    <File>vriac-20191231_def.xml</File>
    <File>vriac-20191231_lab.xml</File>
    <File>vriac-20191231_pre.xml</File>
    <File>vriac2019q410-kex1028.htm</File>
    <File>vriac2019q410-kex231.htm</File>
    <File>vriac2019q410-kex311.htm</File>
    <File>vriac2019q410-kex312.htm</File>
    <File>vriac2019q410-kex321.htm</File>
    <File>vriac2019q410-kex322.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>voyrfinrgbgrdpos1567a13.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/stpr/2018-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
