10-Q 1 rga-20210930.htm 10-Q rga-20210930
false000089817412/312021Q300008981742021-01-012021-09-300000898174rga:RGAMemberexch:XNYS2021-01-012021-09-300000898174rga:RZAMemberexch:XNYS2021-01-012021-09-300000898174rga:RZBMemberexch:XNYS2021-01-012021-09-30xbrli:shares00008981742021-10-31iso4217:USD00008981742021-09-3000008981742020-12-31iso4217:USDxbrli:shares00008981742021-07-012021-09-3000008981742020-07-012020-09-3000008981742020-01-012020-09-300000898174us-gaap:RetainedEarningsMember2021-07-012021-09-300000898174us-gaap:RetainedEarningsMember2020-07-012020-09-300000898174us-gaap:RetainedEarningsMember2021-01-012021-09-300000898174us-gaap:RetainedEarningsMember2020-01-012020-09-300000898174us-gaap:CommonStockMember2021-06-300000898174us-gaap:AdditionalPaidInCapitalMember2021-06-300000898174us-gaap:RetainedEarningsMember2021-06-300000898174us-gaap:TreasuryStockMember2021-06-300000898174us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-06-3000008981742021-06-300000898174us-gaap:TreasuryStockMember2021-07-012021-09-300000898174us-gaap:AdditionalPaidInCapitalMember2021-07-012021-09-300000898174us-gaap:CommonStockMember2021-09-300000898174us-gaap:AdditionalPaidInCapitalMember2021-09-300000898174us-gaap:RetainedEarningsMember2021-09-300000898174us-gaap:TreasuryStockMember2021-09-300000898174us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-09-300000898174us-gaap:CommonStockMember2020-06-300000898174us-gaap:AdditionalPaidInCapitalMember2020-06-300000898174us-gaap:RetainedEarningsMember2020-06-300000898174us-gaap:TreasuryStockMember2020-06-300000898174us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-06-3000008981742020-06-300000898174us-gaap:TreasuryStockMember2020-07-012020-09-300000898174us-gaap:AdditionalPaidInCapitalMember2020-07-012020-09-300000898174us-gaap:CommonStockMember2020-09-300000898174us-gaap:AdditionalPaidInCapitalMember2020-09-300000898174us-gaap:RetainedEarningsMember2020-09-300000898174us-gaap:TreasuryStockMember2020-09-300000898174us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-09-3000008981742020-09-300000898174us-gaap:CommonStockMember2020-12-310000898174us-gaap:AdditionalPaidInCapitalMember2020-12-310000898174us-gaap:RetainedEarningsMember2020-12-310000898174us-gaap:TreasuryStockMember2020-12-310000898174us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-12-310000898174us-gaap:AccountingStandardsUpdate201802Memberus-gaap:RetainedEarningsMember2021-01-012021-09-300000898174us-gaap:AccountingStandardsUpdate201802Member2021-01-012021-09-300000898174us-gaap:AdditionalPaidInCapitalMember2021-01-012021-09-300000898174us-gaap:TreasuryStockMember2021-01-012021-09-300000898174us-gaap:CommonStockMember2019-12-310000898174us-gaap:AdditionalPaidInCapitalMember2019-12-310000898174us-gaap:RetainedEarningsMember2019-12-310000898174us-gaap:TreasuryStockMember2019-12-310000898174us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-12-3100008981742019-12-310000898174us-gaap:AccountingStandardsUpdate201802Memberus-gaap:RetainedEarningsMember2020-01-012020-09-300000898174us-gaap:AccountingStandardsUpdate201802Member2020-01-012020-09-300000898174us-gaap:AdditionalPaidInCapitalMember2020-01-012020-09-300000898174us-gaap:TreasuryStockMember2020-01-012020-09-300000898174us-gaap:EmployeeStockOptionMember2021-07-012021-09-300000898174us-gaap:EmployeeStockOptionMember2021-01-012021-09-300000898174us-gaap:StockCompensationPlanMember2021-07-012021-09-300000898174rga:CommonStockIssuableMember2020-12-310000898174rga:CommonStockHeldInTreasuryMember2020-12-310000898174rga:CommonStockOutstandingMember2020-12-310000898174rga:CommonStockIssuableMember2021-01-012021-09-300000898174rga:CommonStockHeldInTreasuryMember2021-01-012021-09-300000898174rga:CommonStockOutstandingMember2021-01-012021-09-300000898174rga:CommonStockIssuableMember2021-07-012021-09-300000898174rga:CommonStockHeldInTreasuryMember2021-07-012021-09-300000898174rga:CommonStockOutstandingMember2021-07-012021-09-300000898174rga:CommonStockIssuableMember2021-09-300000898174rga:CommonStockHeldInTreasuryMember2021-09-300000898174rga:CommonStockOutstandingMember2021-09-300000898174rga:CommonStockIssuableMember2019-12-310000898174rga:CommonStockHeldInTreasuryMember2019-12-310000898174rga:CommonStockOutstandingMember2019-12-310000898174rga:CommonStockIssuableMember2020-01-012020-09-300000898174rga:CommonStockHeldInTreasuryMember2020-01-012020-09-300000898174rga:CommonStockOutstandingMember2020-01-012020-09-300000898174rga:CommonStockIssuableMember2020-09-300000898174rga:CommonStockHeldInTreasuryMember2020-09-300000898174rga:CommonStockOutstandingMember2020-09-300000898174rga:RGAShareRepurchaseProgramMember2021-01-012021-09-300000898174rga:RGAShareRepurchaseProgramMember2020-01-012020-09-300000898174us-gaap:AccumulatedTranslationAdjustmentMember2020-12-310000898174us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-12-310000898174us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2020-12-310000898174us-gaap:AccumulatedTranslationAdjustmentMember2021-01-012021-09-300000898174us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-01-012021-09-300000898174us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-01-012021-09-300000898174us-gaap:AccumulatedTranslationAdjustmentMember2021-09-300000898174us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-09-300000898174us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-09-300000898174us-gaap:AccumulatedTranslationAdjustmentMember2019-12-310000898174us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2019-12-310000898174us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2019-12-310000898174us-gaap:AccumulatedTranslationAdjustmentMember2020-01-012020-09-300000898174us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-01-012020-09-300000898174us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2020-01-012020-09-300000898174us-gaap:AccumulatedTranslationAdjustmentMember2020-09-300000898174us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-09-300000898174us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2020-09-300000898174us-gaap:CashFlowHedgingMember2021-01-012021-09-300000898174us-gaap:CashFlowHedgingMember2020-01-012020-12-310000898174us-gaap:CashFlowHedgingMember2020-01-012020-09-300000898174us-gaap:CashFlowHedgingMember2019-01-012019-12-310000898174rga:UnrealizedAppreciationDepreciationOfInvestmentsMemberrga:UnrealizedGainsLossesOnAvailableForSaleSecuritiesMember2021-07-012021-09-300000898174rga:UnrealizedAppreciationDepreciationOfInvestmentsMemberrga:UnrealizedGainsLossesOnAvailableForSaleSecuritiesMember2020-07-012020-09-300000898174rga:UnrealizedAppreciationDepreciationOfInvestmentsMemberrga:UnrealizedGainsLossesOnAvailableForSaleSecuritiesMember2021-01-012021-09-300000898174rga:UnrealizedAppreciationDepreciationOfInvestmentsMemberrga:UnrealizedGainsLossesOnAvailableForSaleSecuritiesMember2020-01-012020-09-300000898174us-gaap:InterestRateSwapMemberrga:UnrealizedAppreciationDepreciationOfInvestmentsMember2021-07-012021-09-300000898174us-gaap:InterestRateSwapMemberrga:UnrealizedAppreciationDepreciationOfInvestmentsMember2020-07-012020-09-300000898174us-gaap:InterestRateSwapMemberrga:UnrealizedAppreciationDepreciationOfInvestmentsMember2021-01-012021-09-300000898174us-gaap:InterestRateSwapMemberrga:UnrealizedAppreciationDepreciationOfInvestmentsMember2020-01-012020-09-300000898174us-gaap:CurrencySwapMemberrga:UnrealizedAppreciationDepreciationOfInvestmentsMember2021-07-012021-09-300000898174us-gaap:CurrencySwapMemberrga:UnrealizedAppreciationDepreciationOfInvestmentsMember2020-07-012020-09-300000898174us-gaap:CurrencySwapMemberrga:UnrealizedAppreciationDepreciationOfInvestmentsMember2021-01-012021-09-300000898174us-gaap:CurrencySwapMemberrga:UnrealizedAppreciationDepreciationOfInvestmentsMember2020-01-012020-09-300000898174rga:UnrealizedAppreciationDepreciationOfInvestmentsMemberrga:DacAttributedToUnrealizedGainsLossesMember2021-07-012021-09-300000898174rga:UnrealizedAppreciationDepreciationOfInvestmentsMemberrga:DacAttributedToUnrealizedGainsLossesMember2020-07-012020-09-300000898174rga:UnrealizedAppreciationDepreciationOfInvestmentsMemberrga:DacAttributedToUnrealizedGainsLossesMember2021-01-012021-09-300000898174rga:UnrealizedAppreciationDepreciationOfInvestmentsMemberrga:DacAttributedToUnrealizedGainsLossesMember2020-01-012020-09-300000898174rga:UnrealizedAppreciationDepreciationOfInvestmentsMember2021-07-012021-09-300000898174rga:UnrealizedAppreciationDepreciationOfInvestmentsMember2020-07-012020-09-300000898174rga:UnrealizedAppreciationDepreciationOfInvestmentsMember2021-01-012021-09-300000898174rga:UnrealizedAppreciationDepreciationOfInvestmentsMember2020-01-012020-09-300000898174rga:PriorServiceCostMemberrga:AmortizationOfUnrealizedPensionAndPostretirementBenefitsMember2021-07-012021-09-300000898174rga:PriorServiceCostMemberrga:AmortizationOfUnrealizedPensionAndPostretirementBenefitsMember2020-07-012020-09-300000898174rga:PriorServiceCostMemberrga:AmortizationOfUnrealizedPensionAndPostretirementBenefitsMember2021-01-012021-09-300000898174rga:PriorServiceCostMemberrga:AmortizationOfUnrealizedPensionAndPostretirementBenefitsMember2020-01-012020-09-300000898174rga:AmortizationOfUnrealizedPensionAndPostretirementBenefitsMemberrga:ActuarialGainsLossesMember2021-07-012021-09-300000898174rga:AmortizationOfUnrealizedPensionAndPostretirementBenefitsMemberrga:ActuarialGainsLossesMember2020-07-012020-09-300000898174rga:AmortizationOfUnrealizedPensionAndPostretirementBenefitsMemberrga:ActuarialGainsLossesMember2021-01-012021-09-300000898174rga:AmortizationOfUnrealizedPensionAndPostretirementBenefitsMemberrga:ActuarialGainsLossesMember2020-01-012020-09-300000898174rga:AmortizationOfUnrealizedPensionAndPostretirementBenefitsMember2021-07-012021-09-300000898174rga:AmortizationOfUnrealizedPensionAndPostretirementBenefitsMember2020-07-012020-09-300000898174rga:AmortizationOfUnrealizedPensionAndPostretirementBenefitsMember2021-01-012021-09-300000898174rga:AmortizationOfUnrealizedPensionAndPostretirementBenefitsMember2020-01-012020-09-300000898174rga:AmountsReclassifiedFromAociMember2021-07-012021-09-300000898174rga:AmountsReclassifiedFromAociMember2020-07-012020-09-300000898174rga:AmountsReclassifiedFromAociMember2021-01-012021-09-300000898174rga:AmountsReclassifiedFromAociMember2020-01-012020-09-3000008981742021-01-012021-06-300000898174us-gaap:PerformanceSharesMember2021-01-012021-09-300000898174us-gaap:RestrictedStockUnitsRSUMember2021-01-012021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:FixedMaturitiesMember2021-09-30xbrli:pure0000898174rga:CanadianProvincialGovernmentsMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:AssetBackedSecuritiesMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:USTreasuryAndGovernmentMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:FixedMaturitiesMember2020-12-310000898174rga:CanadianProvincialGovernmentsMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:AssetBackedSecuritiesMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:USTreasuryAndGovernmentMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:FixedMaturitiesMember2020-12-310000898174rga:CollateralFixedMaturitySecuritiesMember2021-09-300000898174rga:CollateralFixedMaturitySecuritiesMember2020-12-310000898174rga:CollateralReceivedFixedMaturitySecuritiesMember2021-09-300000898174rga:CollateralReceivedFixedMaturitySecuritiesMember2020-12-310000898174us-gaap:CarryingReportedAmountFairValueDisclosureMember2021-09-300000898174us-gaap:EstimateOfFairValueFairValueDisclosureMember2021-09-300000898174us-gaap:CarryingReportedAmountFairValueDisclosureMember2020-12-310000898174us-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310000898174rga:GovernmentOfJapanMember2021-09-300000898174rga:GovernmentOfJapanMember2020-12-310000898174rga:CanadianProvinceOfOntarioSecuritiesMember2021-09-300000898174rga:CanadianProvinceOfOntarioSecuritiesMember2020-12-310000898174rga:CanadianProvinceOfQuebecSecuritiesMember2021-09-300000898174rga:CanadianProvinceOfQuebecSecuritiesMember2020-12-310000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:FinancialServicesSectorMember2021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:CommercialAndIndustrialSectorMember2021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:GovernmentSectorMember2021-09-300000898174us-gaap:CorporateDebtSecuritiesMember2021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:FinancialServicesSectorMember2020-12-310000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:CommercialAndIndustrialSectorMember2020-12-310000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:GovernmentSectorMember2020-12-310000898174us-gaap:CorporateDebtSecuritiesMember2020-12-310000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:AvailableforsaleSecuritiesMember2020-12-310000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:AvailableforsaleSecuritiesMember2020-12-310000898174us-gaap:AvailableforsaleSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-12-310000898174us-gaap:AvailableforsaleSecuritiesMember2020-12-310000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:AvailableforsaleSecuritiesMember2021-01-012021-09-300000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:AvailableforsaleSecuritiesMember2021-01-012021-09-300000898174us-gaap:AvailableforsaleSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-01-012021-09-300000898174us-gaap:AvailableforsaleSecuritiesMember2021-01-012021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:AvailableforsaleSecuritiesMember2021-09-300000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:AvailableforsaleSecuritiesMember2021-09-300000898174us-gaap:AvailableforsaleSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-09-300000898174us-gaap:AvailableforsaleSecuritiesMember2021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:AvailableforsaleSecuritiesMember2019-12-310000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:AvailableforsaleSecuritiesMember2019-12-310000898174us-gaap:AvailableforsaleSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2019-12-310000898174us-gaap:AvailableforsaleSecuritiesMember2019-12-310000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:AvailableforsaleSecuritiesMember2020-01-012020-09-300000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:AvailableforsaleSecuritiesMember2020-01-012020-09-300000898174us-gaap:AvailableforsaleSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-01-012020-09-300000898174us-gaap:AvailableforsaleSecuritiesMember2020-01-012020-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:AvailableforsaleSecuritiesMember2020-09-300000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:AvailableforsaleSecuritiesMember2020-09-300000898174us-gaap:AvailableforsaleSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-09-300000898174us-gaap:AvailableforsaleSecuritiesMember2020-09-300000898174rga:LessThan20PercentMember2021-09-300000898174rga:LessThan20PercentMember2020-12-310000898174rga:MoreThanOrEqualTo20PercentForLessThanSixMonthsMember2021-09-300000898174rga:MoreThanOrEqualTo20PercentForLessThanSixMonthsMember2020-12-310000898174rga:MoreThanOrEqualTo20PercentForSixMonthsOrGreaterMember2021-09-300000898174rga:MoreThanOrEqualTo20PercentForSixMonthsOrGreaterMember2020-12-310000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FixedMaturitiesMember2021-09-300000898174rga:CanadianProvincialGovernmentsMemberus-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:AssetBackedSecuritiesMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:ExternalCreditRatingNonInvestmentGradeMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:ExternalCreditRatingNonInvestmentGradeMemberus-gaap:AssetBackedSecuritiesMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:ExternalCreditRatingNonInvestmentGradeMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:ExternalCreditRatingNonInvestmentGradeMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:ExternalCreditRatingNonInvestmentGradeMemberus-gaap:FixedMaturitiesMember2021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FixedMaturitiesMember2020-12-310000898174rga:CanadianProvincialGovernmentsMemberus-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:AssetBackedSecuritiesMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:ExternalCreditRatingNonInvestmentGradeMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:ExternalCreditRatingNonInvestmentGradeMemberus-gaap:AssetBackedSecuritiesMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:ExternalCreditRatingNonInvestmentGradeMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:ExternalCreditRatingNonInvestmentGradeMemberus-gaap:FixedMaturitiesMember2020-12-310000898174us-gaap:ExternalCreditRatingNonInvestmentGradeMemberus-gaap:FixedMaturitiesMember2020-12-310000898174srt:RevisionOfPriorPeriodReclassificationAdjustmentMember2020-01-012020-12-310000898174srt:RevisionOfPriorPeriodReclassificationAdjustmentMember2019-01-012019-12-310000898174srt:RevisionOfPriorPeriodReclassificationAdjustmentMember2018-01-012018-12-310000898174srt:RevisionOfPriorPeriodReclassificationAdjustmentMember2017-01-012017-12-310000898174us-gaap:AvailableforsaleSecuritiesMember2021-07-012021-09-300000898174us-gaap:AvailableforsaleSecuritiesMember2020-07-012020-09-300000898174us-gaap:AvailableforsaleSecuritiesMember2021-01-012021-09-300000898174us-gaap:AvailableforsaleSecuritiesMember2020-01-012020-09-300000898174us-gaap:EquitySecuritiesMember2021-07-012021-09-300000898174us-gaap:EquitySecuritiesMember2020-07-012020-09-300000898174us-gaap:EquitySecuritiesMember2021-01-012021-09-300000898174us-gaap:EquitySecuritiesMember2020-01-012020-09-300000898174us-gaap:MortgagesMember2021-07-012021-09-300000898174us-gaap:MortgagesMember2020-07-012020-09-300000898174us-gaap:MortgagesMember2021-01-012021-09-300000898174us-gaap:MortgagesMember2020-01-012020-09-300000898174us-gaap:PolicyLoansMember2021-07-012021-09-300000898174us-gaap:PolicyLoansMember2020-07-012020-09-300000898174us-gaap:PolicyLoansMember2021-01-012021-09-300000898174us-gaap:PolicyLoansMember2020-01-012020-09-300000898174rga:FundsWithheldAtInterestMember2021-07-012021-09-300000898174rga:FundsWithheldAtInterestMember2020-07-012020-09-300000898174rga:FundsWithheldAtInterestMember2021-01-012021-09-300000898174rga:FundsWithheldAtInterestMember2020-01-012020-09-300000898174us-gaap:ShortTermInvestmentsMember2021-07-012021-09-300000898174us-gaap:ShortTermInvestmentsMember2020-07-012020-09-300000898174us-gaap:ShortTermInvestmentsMember2021-01-012021-09-300000898174us-gaap:ShortTermInvestmentsMember2020-01-012020-09-300000898174us-gaap:OtherAggregatedInvestmentsMember2021-07-012021-09-300000898174us-gaap:OtherAggregatedInvestmentsMember2020-07-012020-09-300000898174us-gaap:OtherAggregatedInvestmentsMember2021-01-012021-09-300000898174us-gaap:OtherAggregatedInvestmentsMember2020-01-012020-09-300000898174us-gaap:MaturityOvernightMemberus-gaap:CorporateDebtSecuritiesMember2021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:MaturityUpTo30DaysMember2021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:Maturity30To90DaysMember2021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:MaturityOver90DaysMember2021-09-300000898174us-gaap:CorporateDebtSecuritiesMember2021-09-300000898174us-gaap:MaturityOvernightMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-09-300000898174us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:MaturityUpTo30DaysMember2021-09-300000898174us-gaap:Maturity30To90DaysMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-09-300000898174us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:MaturityOver90DaysMember2021-09-300000898174us-gaap:USStatesAndPoliticalSubdivisionsMember2021-09-300000898174us-gaap:MaturityOvernightMember2021-09-300000898174us-gaap:MaturityUpTo30DaysMember2021-09-300000898174us-gaap:Maturity30To90DaysMember2021-09-300000898174us-gaap:MaturityOver90DaysMember2021-09-300000898174us-gaap:MaturityOvernightMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:MaturityUpTo30DaysMember2021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:Maturity30To90DaysMember2021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:MaturityOver90DaysMember2021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMember2021-09-300000898174us-gaap:MaturityOvernightMemberus-gaap:CorporateDebtSecuritiesMember2020-12-310000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:MaturityUpTo30DaysMember2020-12-310000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:Maturity30To90DaysMember2020-12-310000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:MaturityOver90DaysMember2020-12-310000898174us-gaap:CorporateDebtSecuritiesMember2020-12-310000898174us-gaap:MaturityOvernightMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-12-310000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:MaturityUpTo30DaysMember2020-12-310000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:Maturity30To90DaysMember2020-12-310000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:MaturityOver90DaysMember2020-12-310000898174us-gaap:ForeignGovernmentDebtSecuritiesMember2020-12-310000898174us-gaap:MaturityOvernightMember2020-12-310000898174us-gaap:MaturityUpTo30DaysMember2020-12-310000898174us-gaap:Maturity30To90DaysMember2020-12-310000898174us-gaap:MaturityOver90DaysMember2020-12-310000898174stpr:TX2021-09-300000898174stpr:CA2021-09-300000898174stpr:GA2021-09-300000898174country:CA2021-09-300000898174country:GB2021-09-300000898174srt:OfficeBuildingMember2021-09-300000898174srt:OfficeBuildingMember2020-12-310000898174srt:RetailSiteMember2021-09-300000898174srt:RetailSiteMember2020-12-310000898174srt:IndustrialPropertyMember2021-09-300000898174srt:IndustrialPropertyMember2020-12-310000898174srt:ApartmentBuildingMember2021-09-300000898174srt:ApartmentBuildingMember2020-12-310000898174srt:OtherPropertyMember2021-09-300000898174srt:OtherPropertyMember2020-12-310000898174rga:MortgageLoansOnRealEstateDueOneYearThroughFiveYearsMember2021-09-300000898174rga:MortgageLoansOnRealEstateDueOneYearThroughFiveYearsMember2020-12-310000898174rga:MortgageLoansOnRealEstateDueAfterFiveYearsMember2021-09-300000898174rga:MortgageLoansOnRealEstateDueAfterFiveYearsMember2020-12-310000898174rga:MortgageLoansOnRealEstateDueAfterTenYearsMember2021-09-300000898174rga:MortgageLoansOnRealEstateDueAfterTenYearsMember2020-12-310000898174rga:LTV0To59PercentMemberrga:DebtServiceCoverageRatioRangeOneMember2021-09-300000898174rga:LTV0To59PercentMemberrga:DebtServiceCoverageRatioRangeTwoMember2021-09-300000898174rga:LTV0To59PercentMemberrga:DebtServiceCoverageRatioRangeThreeMember2021-09-300000898174rga:LTV0To59PercentMember2021-09-300000898174rga:LTV60To69PercentMemberrga:DebtServiceCoverageRatioRangeOneMember2021-09-300000898174rga:LTV60To69PercentMemberrga:DebtServiceCoverageRatioRangeTwoMember2021-09-300000898174rga:LTV60To69PercentMemberrga:DebtServiceCoverageRatioRangeThreeMember2021-09-300000898174rga:LTV60To69PercentMember2021-09-300000898174rga:LTV70To79PercentMemberrga:DebtServiceCoverageRatioRangeOneMember2021-09-300000898174rga:LTV70To79PercentMemberrga:DebtServiceCoverageRatioRangeTwoMember2021-09-300000898174rga:LTV70To79PercentMemberrga:DebtServiceCoverageRatioRangeThreeMember2021-09-300000898174rga:LTV70To79PercentMember2021-09-300000898174us-gaap:Ltv80To100PercentMemberrga:DebtServiceCoverageRatioRangeOneMember2021-09-300000898174us-gaap:Ltv80To100PercentMemberrga:DebtServiceCoverageRatioRangeTwoMember2021-09-300000898174us-gaap:Ltv80To100PercentMemberrga:DebtServiceCoverageRatioRangeThreeMember2021-09-300000898174us-gaap:Ltv80To100PercentMember2021-09-300000898174rga:DebtServiceCoverageRatioRangeOneMember2021-09-300000898174rga:DebtServiceCoverageRatioRangeTwoMember2021-09-300000898174rga:DebtServiceCoverageRatioRangeThreeMember2021-09-300000898174rga:LTV0To59PercentMemberrga:DebtServiceCoverageRatioRangeOneMember2020-12-310000898174rga:LTV0To59PercentMemberrga:DebtServiceCoverageRatioRangeTwoMember2020-12-310000898174rga:LTV0To59PercentMemberrga:DebtServiceCoverageRatioRangeThreeMember2020-12-310000898174rga:LTV0To59PercentMember2020-12-310000898174rga:LTV60To69PercentMemberrga:DebtServiceCoverageRatioRangeOneMember2020-12-310000898174rga:LTV60To69PercentMemberrga:DebtServiceCoverageRatioRangeTwoMember2020-12-310000898174rga:LTV60To69PercentMemberrga:DebtServiceCoverageRatioRangeThreeMember2020-12-310000898174rga:LTV60To69PercentMember2020-12-310000898174rga:LTV70To79PercentMemberrga:DebtServiceCoverageRatioRangeOneMember2020-12-310000898174rga:LTV70To79PercentMemberrga:DebtServiceCoverageRatioRangeTwoMember2020-12-310000898174rga:LTV70To79PercentMemberrga:DebtServiceCoverageRatioRangeThreeMember2020-12-310000898174rga:LTV70To79PercentMember2020-12-310000898174us-gaap:Ltv80To100PercentMemberrga:DebtServiceCoverageRatioRangeOneMember2020-12-310000898174us-gaap:Ltv80To100PercentMemberrga:DebtServiceCoverageRatioRangeTwoMember2020-12-310000898174us-gaap:Ltv80To100PercentMemberrga:DebtServiceCoverageRatioRangeThreeMember2020-12-310000898174us-gaap:Ltv80To100PercentMember2020-12-310000898174rga:DebtServiceCoverageRatioRangeOneMember2020-12-310000898174rga:DebtServiceCoverageRatioRangeTwoMember2020-12-310000898174rga:DebtServiceCoverageRatioRangeThreeMember2020-12-310000898174rga:YearOfOrigination2021Memberrga:HighInvestmentGradeMember2021-09-300000898174rga:YearOfOrigination2020Memberrga:HighInvestmentGradeMember2021-09-300000898174rga:YearOfOrigination2019Memberrga:HighInvestmentGradeMember2021-09-300000898174rga:YearOfOrigination2018Memberrga:HighInvestmentGradeMember2021-09-300000898174rga:YearOfOrigination2017Memberrga:HighInvestmentGradeMember2021-09-300000898174rga:YearOfOriginationPriorPeriodsMemberrga:HighInvestmentGradeMember2021-09-300000898174rga:HighInvestmentGradeMember2021-09-300000898174us-gaap:InternalInvestmentGradeMemberrga:YearOfOrigination2021Member2021-09-300000898174rga:YearOfOrigination2020Memberus-gaap:InternalInvestmentGradeMember2021-09-300000898174rga:YearOfOrigination2019Memberus-gaap:InternalInvestmentGradeMember2021-09-300000898174rga:YearOfOrigination2018Memberus-gaap:InternalInvestmentGradeMember2021-09-300000898174rga:YearOfOrigination2017Memberus-gaap:InternalInvestmentGradeMember2021-09-300000898174rga:YearOfOriginationPriorPeriodsMemberus-gaap:InternalInvestmentGradeMember2021-09-300000898174us-gaap:InternalInvestmentGradeMember2021-09-300000898174rga:YearOfOrigination2021Memberrga:AverageInvestmentGradeMember2021-09-300000898174rga:YearOfOrigination2020Memberrga:AverageInvestmentGradeMember2021-09-300000898174rga:YearOfOrigination2019Memberrga:AverageInvestmentGradeMember2021-09-300000898174rga:YearOfOrigination2018Memberrga:AverageInvestmentGradeMember2021-09-300000898174rga:YearOfOrigination2017Memberrga:AverageInvestmentGradeMember2021-09-300000898174rga:YearOfOriginationPriorPeriodsMemberrga:AverageInvestmentGradeMember2021-09-300000898174rga:AverageInvestmentGradeMember2021-09-300000898174rga:WatchListMemberrga:YearOfOrigination2021Member2021-09-300000898174rga:WatchListMemberrga:YearOfOrigination2020Member2021-09-300000898174rga:WatchListMemberrga:YearOfOrigination2019Member2021-09-300000898174rga:WatchListMemberrga:YearOfOrigination2018Member2021-09-300000898174rga:YearOfOrigination2017Memberrga:WatchListMember2021-09-300000898174rga:WatchListMemberrga:YearOfOriginationPriorPeriodsMember2021-09-300000898174rga:WatchListMember2021-09-300000898174us-gaap:InternalNoninvestmentGradeMemberrga:YearOfOrigination2021Member2021-09-300000898174us-gaap:InternalNoninvestmentGradeMemberrga:YearOfOrigination2020Member2021-09-300000898174us-gaap:InternalNoninvestmentGradeMemberrga:YearOfOrigination2019Member2021-09-300000898174us-gaap:InternalNoninvestmentGradeMemberrga:YearOfOrigination2018Member2021-09-300000898174rga:YearOfOrigination2017Memberus-gaap:InternalNoninvestmentGradeMember2021-09-300000898174us-gaap:InternalNoninvestmentGradeMemberrga:YearOfOriginationPriorPeriodsMember2021-09-300000898174us-gaap:InternalNoninvestmentGradeMember2021-09-300000898174rga:YearOfOrigination2021Member2021-09-300000898174rga:YearOfOrigination2020Member2021-09-300000898174rga:YearOfOrigination2019Member2021-09-300000898174rga:YearOfOrigination2018Member2021-09-300000898174rga:YearOfOrigination2017Member2021-09-300000898174rga:YearOfOriginationPriorPeriodsMember2021-09-300000898174rga:YearOfOrigination2020Memberrga:HighInvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2019Memberrga:HighInvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2018Memberrga:HighInvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2017Memberrga:HighInvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2016Memberrga:HighInvestmentGradeMember2020-12-310000898174rga:YearOfOriginationPriorPeriodsMemberrga:HighInvestmentGradeMember2020-12-310000898174rga:HighInvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2020Memberus-gaap:InternalInvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2019Memberus-gaap:InternalInvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2018Memberus-gaap:InternalInvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2017Memberus-gaap:InternalInvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2016Memberus-gaap:InternalInvestmentGradeMember2020-12-310000898174rga:YearOfOriginationPriorPeriodsMemberus-gaap:InternalInvestmentGradeMember2020-12-310000898174us-gaap:InternalInvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2020Memberrga:AverageInvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2019Memberrga:AverageInvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2018Memberrga:AverageInvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2017Memberrga:AverageInvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2016Memberrga:AverageInvestmentGradeMember2020-12-310000898174rga:YearOfOriginationPriorPeriodsMemberrga:AverageInvestmentGradeMember2020-12-310000898174rga:AverageInvestmentGradeMember2020-12-310000898174rga:WatchListMemberrga:YearOfOrigination2020Member2020-12-310000898174rga:WatchListMemberrga:YearOfOrigination2019Member2020-12-310000898174rga:WatchListMemberrga:YearOfOrigination2018Member2020-12-310000898174rga:YearOfOrigination2017Memberrga:WatchListMember2020-12-310000898174rga:YearOfOrigination2016Memberrga:WatchListMember2020-12-310000898174rga:WatchListMemberrga:YearOfOriginationPriorPeriodsMember2020-12-310000898174rga:WatchListMember2020-12-310000898174us-gaap:InternalNoninvestmentGradeMemberrga:YearOfOrigination2020Member2020-12-310000898174us-gaap:InternalNoninvestmentGradeMemberrga:YearOfOrigination2019Member2020-12-310000898174us-gaap:InternalNoninvestmentGradeMemberrga:YearOfOrigination2018Member2020-12-310000898174rga:YearOfOrigination2017Memberus-gaap:InternalNoninvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2016Memberus-gaap:InternalNoninvestmentGradeMember2020-12-310000898174us-gaap:InternalNoninvestmentGradeMemberrga:YearOfOriginationPriorPeriodsMember2020-12-310000898174us-gaap:InternalNoninvestmentGradeMember2020-12-310000898174rga:YearOfOrigination2020Member2020-12-310000898174rga:YearOfOrigination2019Member2020-12-310000898174rga:YearOfOrigination2018Member2020-12-310000898174rga:YearOfOrigination2017Member2020-12-310000898174rga:YearOfOrigination2016Member2020-12-310000898174rga:YearOfOriginationPriorPeriodsMember2020-12-310000898174us-gaap:FinancialAssetNotPastDueMember2021-09-300000898174us-gaap:FinancialAssetNotPastDueMember2020-12-310000898174us-gaap:FinancingReceivables30To59DaysPastDueMember2021-09-300000898174us-gaap:FinancingReceivables30To59DaysPastDueMember2020-12-310000898174us-gaap:CommercialRealEstatePortfolioSegmentMember2021-09-300000898174us-gaap:CommercialRealEstatePortfolioSegmentMember2020-12-310000898174rga:CommercialRealEstateOtherReceivableWithNoRelatedAllowanceMember2021-09-300000898174rga:CommercialRealEstateOtherReceivableWithRelatedAllowanceMember2021-09-300000898174rga:CommercialRealEstateOtherReceivableWithNoRelatedAllowanceMember2020-12-310000898174rga:CommercialRealEstateOtherReceivableWithRelatedAllowanceMember2020-12-310000898174rga:CommercialRealEstateOtherReceivableWithNoRelatedAllowanceMember2021-07-012021-09-300000898174rga:CommercialRealEstateOtherReceivableWithNoRelatedAllowanceMember2020-07-012020-09-300000898174rga:CommercialRealEstateOtherReceivableWithRelatedAllowanceMember2021-07-012021-09-300000898174rga:CommercialRealEstateOtherReceivableWithRelatedAllowanceMember2020-07-012020-09-300000898174rga:CommercialRealEstateOtherReceivableWithNoRelatedAllowanceMember2021-01-012021-09-300000898174rga:CommercialRealEstateOtherReceivableWithNoRelatedAllowanceMember2020-01-012020-09-300000898174rga:CommercialRealEstateOtherReceivableWithRelatedAllowanceMember2021-01-012021-09-300000898174rga:CommercialRealEstateOtherReceivableWithRelatedAllowanceMember2020-01-012020-09-300000898174us-gaap:LimitedPartnerMember2021-09-300000898174us-gaap:LimitedPartnerMember2020-12-310000898174rga:EquityReleaseMortgagesMember2021-09-300000898174rga:EquityReleaseMortgagesMember2020-12-310000898174us-gaap:DerivativeMember2021-09-300000898174us-gaap:DerivativeMember2020-12-310000898174rga:FairValueOptionContractholderDirectedUnitLinkedInvestmentsMember2021-09-300000898174rga:FairValueOptionContractholderDirectedUnitLinkedInvestmentsMember2020-12-310000898174us-gaap:OtherCreditDerivativesMember2021-09-300000898174us-gaap:OtherCreditDerivativesMember2020-12-310000898174us-gaap:NondesignatedMemberus-gaap:InterestRateSwapMember2021-09-300000898174us-gaap:NondesignatedMemberus-gaap:InterestRateSwapMember2020-12-310000898174us-gaap:NondesignatedMemberus-gaap:FutureMember2021-09-300000898174us-gaap:NondesignatedMemberus-gaap:FutureMember2020-12-310000898174us-gaap:NondesignatedMemberus-gaap:CurrencySwapMember2021-09-300000898174us-gaap:NondesignatedMemberus-gaap:CurrencySwapMember2020-12-310000898174us-gaap:ForeignExchangeForwardMemberus-gaap:NondesignatedMember2021-09-300000898174us-gaap:ForeignExchangeForwardMemberus-gaap:NondesignatedMember2020-12-310000898174rga:ConsumerPriceIndexSwapMemberus-gaap:NondesignatedMember2021-09-300000898174rga:ConsumerPriceIndexSwapMemberus-gaap:NondesignatedMember2020-12-310000898174us-gaap:NondesignatedMemberus-gaap:CreditDefaultSwapMember2021-09-300000898174us-gaap:NondesignatedMemberus-gaap:CreditDefaultSwapMember2020-12-310000898174us-gaap:NondesignatedMemberus-gaap:EquityMember2021-09-300000898174us-gaap:NondesignatedMemberus-gaap:EquityMember2020-12-310000898174us-gaap:NondesignatedMemberrga:SyntheticGuaranteedInvestmentContractsMember2021-09-300000898174us-gaap:NondesignatedMemberrga:SyntheticGuaranteedInvestmentContractsMember2020-12-310000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInModifiedCoinsuranceOrFundsWithheldArrangementsMember2021-09-300000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInModifiedCoinsuranceOrFundsWithheldArrangementsMember2020-12-310000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInIndexedAnnuityMember2021-09-300000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInIndexedAnnuityMember2020-12-310000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInVariableAnnuityMember2021-09-300000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInVariableAnnuityMember2020-12-310000898174us-gaap:NondesignatedMember2021-09-300000898174us-gaap:NondesignatedMember2020-12-310000898174us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000898174us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000898174us-gaap:CurrencySwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000898174us-gaap:CurrencySwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000898174us-gaap:ForeignExchangeForwardMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000898174us-gaap:ForeignExchangeForwardMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000898174us-gaap:PurchaseCommitmentMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000898174us-gaap:PurchaseCommitmentMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000898174us-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000898174us-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000898174us-gaap:CashFlowHedgingMember2021-04-012021-06-300000898174us-gaap:CashFlowHedgingMember2020-04-012020-06-300000898174us-gaap:CashFlowHedgingMemberus-gaap:OtherComprehensiveIncomeMember2021-07-012021-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:OtherComprehensiveIncomeMember2020-07-012020-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InvestmentIncomeMember2021-07-012021-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InvestmentIncomeMember2020-07-012020-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestExpenseMember2021-07-012021-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestExpenseMember2020-07-012020-09-300000898174us-gaap:CashFlowHedgingMember2021-07-012021-09-300000898174us-gaap:CashFlowHedgingMember2020-07-012020-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:OtherComprehensiveIncomeMember2021-01-012021-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:OtherComprehensiveIncomeMember2020-01-012020-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InvestmentIncomeMember2021-01-012021-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InvestmentIncomeMember2020-01-012020-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestExpenseMember2021-01-012021-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestExpenseMember2020-01-012020-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestRateSwapMemberus-gaap:OtherComprehensiveIncomeMember2021-07-012021-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestRateSwapMemberus-gaap:InvestmentIncomeMember2021-07-012021-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestRateSwapMemberus-gaap:InterestExpenseMember2021-07-012021-09-300000898174us-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMemberus-gaap:OtherComprehensiveIncomeMember2021-07-012021-09-300000898174us-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMemberus-gaap:InvestmentIncomeMember2021-07-012021-09-300000898174us-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestExpenseMember2021-07-012021-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestRateSwapMemberus-gaap:OtherComprehensiveIncomeMember2020-07-012020-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestRateSwapMemberus-gaap:InvestmentIncomeMember2020-07-012020-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestRateSwapMemberus-gaap:InterestExpenseMember2020-07-012020-09-300000898174us-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMemberus-gaap:OtherComprehensiveIncomeMember2020-07-012020-09-300000898174us-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMemberus-gaap:InvestmentIncomeMember2020-07-012020-09-300000898174us-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestExpenseMember2020-07-012020-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestRateSwapMemberus-gaap:OtherComprehensiveIncomeMember2021-01-012021-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestRateSwapMemberus-gaap:InvestmentIncomeMember2021-01-012021-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestRateSwapMemberus-gaap:InterestExpenseMember2021-01-012021-09-300000898174us-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMemberus-gaap:OtherComprehensiveIncomeMember2021-01-012021-09-300000898174us-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMemberus-gaap:InvestmentIncomeMember2021-01-012021-09-300000898174us-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestExpenseMember2021-01-012021-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestRateSwapMemberus-gaap:OtherComprehensiveIncomeMember2020-01-012020-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestRateSwapMemberus-gaap:InvestmentIncomeMember2020-01-012020-09-300000898174us-gaap:CashFlowHedgingMemberus-gaap:InterestRateSwapMemberus-gaap:InterestExpenseMember2020-01-012020-09-300000898174us-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMemberus-gaap:OtherComprehensiveIncomeMember2020-01-012020-09-300000898174us-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMemberus-gaap:InvestmentIncomeMember2020-01-012020-09-300000898174us-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestExpenseMember2020-01-012020-09-300000898174us-gaap:CurrencySwapMember2021-07-012021-09-300000898174us-gaap:CurrencySwapMember2020-07-012020-09-300000898174us-gaap:CurrencySwapMember2021-01-012021-09-300000898174us-gaap:CurrencySwapMember2020-01-012020-09-300000898174us-gaap:ForeignExchangeForwardMember2021-07-012021-09-300000898174us-gaap:ForeignExchangeForwardMember2020-07-012020-09-300000898174us-gaap:ForeignExchangeForwardMember2021-01-012021-09-300000898174us-gaap:ForeignExchangeForwardMember2020-01-012020-09-300000898174us-gaap:NondesignatedMemberus-gaap:InterestRateSwapMember2021-07-012021-09-300000898174us-gaap:NondesignatedMemberus-gaap:InterestRateSwapMember2020-07-012020-09-300000898174us-gaap:NondesignatedMemberus-gaap:FutureMember2021-07-012021-09-300000898174us-gaap:NondesignatedMemberus-gaap:FutureMember2020-07-012020-09-300000898174us-gaap:NondesignatedMemberus-gaap:CurrencySwapMember2021-07-012021-09-300000898174us-gaap:NondesignatedMemberus-gaap:CurrencySwapMember2020-07-012020-09-300000898174us-gaap:NondesignatedMemberus-gaap:ForeignExchangeForwardMember2021-07-012021-09-300000898174us-gaap:NondesignatedMemberus-gaap:ForeignExchangeForwardMember2020-07-012020-09-300000898174us-gaap:NondesignatedMemberrga:ConsumerPriceIndexSwapMember2021-07-012021-09-300000898174us-gaap:NondesignatedMemberrga:ConsumerPriceIndexSwapMember2020-07-012020-09-300000898174us-gaap:NondesignatedMemberus-gaap:CreditDefaultSwapMember2021-07-012021-09-300000898174us-gaap:NondesignatedMemberus-gaap:CreditDefaultSwapMember2020-07-012020-09-300000898174us-gaap:NondesignatedMemberus-gaap:EquityMember2021-07-012021-09-300000898174us-gaap:NondesignatedMemberus-gaap:EquityMember2020-07-012020-09-300000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInModifiedCoinsuranceOrFundsWithheldArrangementsMember2021-07-012021-09-300000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInModifiedCoinsuranceOrFundsWithheldArrangementsMember2020-07-012020-09-300000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInIndexedAnnuityMember2021-07-012021-09-300000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInIndexedAnnuityMember2020-07-012020-09-300000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInVariableAnnuityMember2021-07-012021-09-300000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInVariableAnnuityMember2020-07-012020-09-300000898174us-gaap:NondesignatedMember2021-07-012021-09-300000898174us-gaap:NondesignatedMember2020-07-012020-09-300000898174us-gaap:NondesignatedMemberus-gaap:InterestRateSwapMember2021-01-012021-09-300000898174us-gaap:NondesignatedMemberus-gaap:InterestRateSwapMember2020-01-012020-09-300000898174us-gaap:NondesignatedMemberus-gaap:FutureMember2021-01-012021-09-300000898174us-gaap:NondesignatedMemberus-gaap:FutureMember2020-01-012020-09-300000898174us-gaap:NondesignatedMemberus-gaap:CurrencySwapMember2021-01-012021-09-300000898174us-gaap:NondesignatedMemberus-gaap:CurrencySwapMember2020-01-012020-09-300000898174us-gaap:NondesignatedMemberus-gaap:ForeignExchangeForwardMember2021-01-012021-09-300000898174us-gaap:NondesignatedMemberus-gaap:ForeignExchangeForwardMember2020-01-012020-09-300000898174us-gaap:NondesignatedMemberrga:ConsumerPriceIndexSwapMember2021-01-012021-09-300000898174us-gaap:NondesignatedMemberrga:ConsumerPriceIndexSwapMember2020-01-012020-09-300000898174us-gaap:NondesignatedMemberus-gaap:CreditDefaultSwapMember2021-01-012021-09-300000898174us-gaap:NondesignatedMemberus-gaap:CreditDefaultSwapMember2020-01-012020-09-300000898174us-gaap:NondesignatedMemberus-gaap:EquityMember2021-01-012021-09-300000898174us-gaap:NondesignatedMemberus-gaap:EquityMember2020-01-012020-09-300000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInModifiedCoinsuranceOrFundsWithheldArrangementsMember2021-01-012021-09-300000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInModifiedCoinsuranceOrFundsWithheldArrangementsMember2020-01-012020-09-300000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInIndexedAnnuityMember2021-01-012021-09-300000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInIndexedAnnuityMember2020-01-012020-09-300000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInVariableAnnuityMember2021-01-012021-09-300000898174us-gaap:NondesignatedMemberrga:EmbeddedDerivativesInVariableAnnuityMember2020-01-012020-09-300000898174us-gaap:NondesignatedMember2021-01-012021-09-300000898174us-gaap:NondesignatedMember2020-01-012020-09-300000898174rga:StandardPoorsAaaToAminusRatingsMemberrga:SingleNameCreditDefaultSwapsMember2021-09-300000898174rga:StandardPoorsAaaToAminusRatingsMemberrga:SingleNameCreditDefaultSwapsMember2021-01-012021-09-300000898174rga:StandardPoorsAaaToAminusRatingsMemberrga:SingleNameCreditDefaultSwapsMember2020-12-310000898174rga:StandardPoorsAaaToAminusRatingsMemberrga:SingleNameCreditDefaultSwapsMember2020-01-012020-12-310000898174rga:StandardPoorsAaaToAminusRatingsMemberrga:CreditDefaultSubtotalMember2021-09-300000898174rga:StandardPoorsAaaToAminusRatingsMemberrga:CreditDefaultSubtotalMember2021-01-012021-09-300000898174rga:StandardPoorsAaaToAminusRatingsMemberrga:CreditDefaultSubtotalMember2020-12-310000898174rga:StandardPoorsAaaToAminusRatingsMemberrga:CreditDefaultSubtotalMember2020-01-012020-12-310000898174rga:SingleNameCreditDefaultSwapsMembersrt:StandardPoorsBBBRatingMember2021-09-300000898174rga:SingleNameCreditDefaultSwapsMembersrt:StandardPoorsBBBRatingMember2021-01-012021-09-300000898174rga:SingleNameCreditDefaultSwapsMembersrt:StandardPoorsBBBRatingMember2020-12-310000898174rga:SingleNameCreditDefaultSwapsMembersrt:StandardPoorsBBBRatingMember2020-01-012020-12-310000898174srt:StandardPoorsBBBRatingMemberrga:CreditDefaultSwapsReferencingIndicesMember2021-09-300000898174srt:StandardPoorsBBBRatingMemberrga:CreditDefaultSwapsReferencingIndicesMember2021-01-012021-09-300000898174srt:StandardPoorsBBBRatingMemberrga:CreditDefaultSwapsReferencingIndicesMember2020-12-310000898174srt:StandardPoorsBBBRatingMemberrga:CreditDefaultSwapsReferencingIndicesMember2020-01-012020-12-310000898174srt:StandardPoorsBBBRatingMemberrga:CreditDefaultSubtotalMember2021-09-300000898174srt:StandardPoorsBBBRatingMemberrga:CreditDefaultSubtotalMember2021-01-012021-09-300000898174srt:StandardPoorsBBBRatingMemberrga:CreditDefaultSubtotalMember2020-12-310000898174srt:StandardPoorsBBBRatingMemberrga:CreditDefaultSubtotalMember2020-01-012020-12-310000898174srt:StandardPoorsBBRatingMemberrga:SingleNameCreditDefaultSwapsMember2021-09-300000898174srt:StandardPoorsBBRatingMember2021-01-012021-09-300000898174srt:StandardPoorsBBRatingMemberrga:SingleNameCreditDefaultSwapsMember2020-12-310000898174srt:StandardPoorsBBRatingMember2020-01-012020-12-310000898174srt:StandardPoorsBBRatingMemberrga:CreditDefaultSubtotalMember2021-09-300000898174srt:StandardPoorsBBRatingMemberrga:CreditDefaultSubtotalMember2020-12-3100008981742020-01-012020-12-310000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2021-09-300000898174us-gaap:FairValueInputsLevel3Memberus-gaap:CorporateDebtSecuritiesMember2021-09-300000898174rga:CanadianProvincialGovernmentsMember2021-09-300000898174rga:CanadianProvincialGovernmentsMemberus-gaap:FairValueInputsLevel1Member2021-09-300000898174rga:CanadianProvincialGovernmentsMemberus-gaap:FairValueInputsLevel2Member2021-09-300000898174us-gaap:FairValueInputsLevel3Memberrga:CanadianProvincialGovernmentsMember2021-09-300000898174us-gaap:ResidentialMortgageBackedSecuritiesMember2021-09-300000898174us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2021-09-300000898174us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2021-09-300000898174us-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-09-300000898174us-gaap:AssetBackedSecuritiesMember2021-09-300000898174us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2021-09-300000898174us-gaap:FairValueInputsLevel2Memberus-gaap:AssetBackedSecuritiesMember2021-09-300000898174us-gaap:FairValueInputsLevel3Memberus-gaap:AssetBackedSecuritiesMember2021-09-300000898174us-gaap:CommercialMortgageBackedSecuritiesMember2021-09-300000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2021-09-300000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2021-09-300000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMember2021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2021-09-300000898174us-gaap:USStatesAndPoliticalSubdivisionsMember2021-09-300000898174us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel1Member2021-09-300000898174us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel2Member2021-09-300000898174us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel3Member2021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMember2021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2021-09-300000898174us-gaap:FairValueInputsLevel3Memberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-09-300000898174us-gaap:FairValueInputsLevel1Member2021-09-300000898174us-gaap:FairValueInputsLevel2Member2021-09-300000898174us-gaap:FairValueInputsLevel3Member2021-09-300000898174us-gaap:InterestRateSwapMember2021-09-300000898174us-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel1Member2021-09-300000898174us-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel2Member2021-09-300000898174us-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateSwapMember2021-09-300000898174rga:FairValueOptionContractholderDirectedUnitLinkedInvestmentsMember2021-09-300000898174rga:FairValueOptionContractholderDirectedUnitLinkedInvestmentsMemberus-gaap:FairValueInputsLevel1Member2021-09-300000898174rga:FairValueOptionContractholderDirectedUnitLinkedInvestmentsMemberus-gaap:FairValueInputsLevel2Member2021-09-300000898174us-gaap:FairValueInputsLevel3Memberrga:FairValueOptionContractholderDirectedUnitLinkedInvestmentsMember2021-09-300000898174us-gaap:OtherCreditDerivativesMember2021-09-300000898174us-gaap:FairValueInputsLevel1Memberus-gaap:OtherCreditDerivativesMember2021-09-300000898174us-gaap:FairValueInputsLevel2Memberus-gaap:OtherCreditDerivativesMember2021-09-300000898174us-gaap:FairValueInputsLevel3Memberus-gaap:OtherCreditDerivativesMember2021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2020-12-310000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2020-12-310000898174us-gaap:FairValueInputsLevel3Memberus-gaap:CorporateDebtSecuritiesMember2020-12-310000898174rga:CanadianProvincialGovernmentsMember2020-12-310000898174rga:CanadianProvincialGovernmentsMemberus-gaap:FairValueInputsLevel1Member2020-12-310000898174rga:CanadianProvincialGovernmentsMemberus-gaap:FairValueInputsLevel2Member2020-12-310000898174us-gaap:FairValueInputsLevel3Memberrga:CanadianProvincialGovernmentsMember2020-12-310000898174us-gaap:ResidentialMortgageBackedSecuritiesMember2020-12-310000898174us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2020-12-310000898174us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2020-12-310000898174us-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-12-310000898174us-gaap:AssetBackedSecuritiesMember2020-12-310000898174us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2020-12-310000898174us-gaap:FairValueInputsLevel2Memberus-gaap:AssetBackedSecuritiesMember2020-12-310000898174us-gaap:FairValueInputsLevel3Memberus-gaap:AssetBackedSecuritiesMember2020-12-310000898174us-gaap:CommercialMortgageBackedSecuritiesMember2020-12-310000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2020-12-310000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2020-12-310000898174us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2020-12-310000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMember2020-12-310000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2020-12-310000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2020-12-310000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2020-12-310000898174us-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310000898174us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel1Member2020-12-310000898174us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel2Member2020-12-310000898174us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel3Member2020-12-310000898174us-gaap:ForeignGovernmentDebtSecuritiesMember2020-12-310000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2020-12-310000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2020-12-310000898174us-gaap:FairValueInputsLevel3Memberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-12-310000898174us-gaap:FairValueInputsLevel1Member2020-12-310000898174us-gaap:FairValueInputsLevel2Member2020-12-310000898174us-gaap:FairValueInputsLevel3Member2020-12-310000898174rga:FairValueOptionContractholderDirectedUnitLinkedInvestmentsMember2020-12-310000898174rga:FairValueOptionContractholderDirectedUnitLinkedInvestmentsMemberus-gaap:FairValueInputsLevel1Member2020-12-310000898174rga:FairValueOptionContractholderDirectedUnitLinkedInvestmentsMemberus-gaap:FairValueInputsLevel2Member2020-12-310000898174us-gaap:FairValueInputsLevel3Memberrga:FairValueOptionContractholderDirectedUnitLinkedInvestmentsMember2020-12-310000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:CorporateDebtSecuritiesMember2021-09-300000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:CorporateDebtSecuritiesMember2020-12-310000898174srt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CorporateDebtSecuritiesMember2021-09-300000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:CorporateDebtSecuritiesMembersrt:MinimumMember2020-12-310000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:CorporateDebtSecuritiesMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CorporateDebtSecuritiesMember2020-12-310000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:CorporateDebtSecuritiesMembersrt:MinimumMemberus-gaap:MeasurementInputEbitdaMultipleMember2021-09-300000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:MeasurementInputEbitdaMultipleMembersrt:MaximumMember2021-09-300000898174srt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:MeasurementInputEbitdaMultipleMember2021-09-300000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:CorporateDebtSecuritiesMembersrt:MinimumMemberus-gaap:MeasurementInputEbitdaMultipleMember2020-12-310000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:MeasurementInputEbitdaMultipleMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:MeasurementInputEbitdaMultipleMember2020-12-310000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:AssetBackedSecuritiesMembersrt:MinimumMember2021-09-300000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:AssetBackedSecuritiesMembersrt:MaximumMember2021-09-300000898174srt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:AssetBackedSecuritiesMember2021-09-300000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:AssetBackedSecuritiesMembersrt:MinimumMember2020-12-310000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:AssetBackedSecuritiesMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:AssetBackedSecuritiesMember2020-12-310000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:USGovernmentAgenciesDebtSecuritiesMembersrt:MinimumMember2021-09-300000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:USGovernmentAgenciesDebtSecuritiesMembersrt:MaximumMember2021-09-300000898174srt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:USGovernmentAgenciesDebtSecuritiesMember2021-09-300000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:USGovernmentAgenciesDebtSecuritiesMembersrt:MinimumMember2020-12-310000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:USGovernmentAgenciesDebtSecuritiesMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:USGovernmentAgenciesDebtSecuritiesMember2020-12-310000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:EquitySecuritiesMember2021-09-300000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:EquitySecuritiesMember2020-12-310000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:EquitySecuritiesMembersrt:MinimumMemberus-gaap:MeasurementInputEbitdaMultipleMember2021-09-300000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:EquitySecuritiesMemberus-gaap:MeasurementInputEbitdaMultipleMembersrt:MaximumMember2021-09-300000898174srt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:EquitySecuritiesMemberus-gaap:MeasurementInputEbitdaMultipleMember2021-09-300000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:EquitySecuritiesMembersrt:MinimumMemberus-gaap:MeasurementInputEbitdaMultipleMember2020-12-310000898174us-gaap:MarketApproachValuationTechniqueMemberus-gaap:EquitySecuritiesMemberus-gaap:MeasurementInputEbitdaMultipleMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:EquitySecuritiesMemberus-gaap:MeasurementInputEbitdaMultipleMember2020-12-310000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMember2021-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMember2020-12-310000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputMortalityRateMembersrt:MinimumMember2021-09-300000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputMortalityRateMembersrt:MaximumMember2021-09-300000898174srt:WeightedAverageMemberus-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputMortalityRateMember2021-09-300000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputMortalityRateMembersrt:MinimumMember2020-12-310000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputMortalityRateMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberus-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputMortalityRateMember2020-12-310000898174us-gaap:MeasurementInputLapseRateMemberus-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMembersrt:MinimumMember2021-09-300000898174us-gaap:MeasurementInputLapseRateMemberus-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMembersrt:MaximumMember2021-09-300000898174us-gaap:MeasurementInputLapseRateMembersrt:WeightedAverageMemberus-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMember2021-09-300000898174us-gaap:MeasurementInputLapseRateMemberus-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMembersrt:MinimumMember2020-12-310000898174us-gaap:MeasurementInputLapseRateMemberus-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMembersrt:MaximumMember2020-12-310000898174us-gaap:MeasurementInputLapseRateMembersrt:WeightedAverageMemberus-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMember2020-12-310000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputWithdrawalRateMembersrt:MinimumMember2021-09-300000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputWithdrawalRateMembersrt:MaximumMember2021-09-300000898174srt:WeightedAverageMemberus-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputWithdrawalRateMember2021-09-300000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputWithdrawalRateMembersrt:MinimumMember2020-12-310000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputWithdrawalRateMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberus-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputWithdrawalRateMember2020-12-310000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputCounterpartyCreditRiskMembersrt:MinimumMember2021-09-300000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputCounterpartyCreditRiskMembersrt:MaximumMember2021-09-300000898174srt:WeightedAverageMemberus-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputCounterpartyCreditRiskMember2021-09-300000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputCounterpartyCreditRiskMembersrt:MinimumMember2020-12-310000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputCounterpartyCreditRiskMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberus-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:MeasurementInputCounterpartyCreditRiskMember2020-12-310000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberrga:MeasurementInputCreditingRateMembersrt:MinimumMember2021-09-300000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberrga:MeasurementInputCreditingRateMembersrt:MaximumMember2021-09-300000898174srt:WeightedAverageMemberus-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberrga:MeasurementInputCreditingRateMember2021-09-300000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberrga:MeasurementInputCreditingRateMembersrt:MinimumMember2020-12-310000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberrga:MeasurementInputCreditingRateMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberus-gaap:IncomeApproachValuationTechniqueMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMemberrga:MeasurementInputCreditingRateMember2020-12-310000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:EmbeddedDerivativesInIndexedAnnuityMember2021-09-300000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:EmbeddedDerivativesInIndexedAnnuityMember2020-12-310000898174rga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:MeasurementInputMortalityRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2021-09-300000898174rga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:MeasurementInputMortalityRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2021-09-300000898174srt:WeightedAverageMemberrga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:MeasurementInputMortalityRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-09-300000898174rga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:MeasurementInputMortalityRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2020-12-310000898174rga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:MeasurementInputMortalityRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberrga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:MeasurementInputMortalityRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-12-310000898174us-gaap:MeasurementInputLapseRateMemberrga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2021-09-300000898174us-gaap:MeasurementInputLapseRateMemberrga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2021-09-300000898174us-gaap:MeasurementInputLapseRateMembersrt:WeightedAverageMemberrga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-09-300000898174us-gaap:MeasurementInputLapseRateMemberrga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2020-12-310000898174us-gaap:MeasurementInputLapseRateMemberrga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2020-12-310000898174us-gaap:MeasurementInputLapseRateMembersrt:WeightedAverageMemberrga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-12-310000898174rga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:MeasurementInputWithdrawalRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2021-09-300000898174rga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:MeasurementInputWithdrawalRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2021-09-300000898174srt:WeightedAverageMemberrga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:MeasurementInputWithdrawalRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-09-300000898174rga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:MeasurementInputWithdrawalRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2020-12-310000898174rga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:MeasurementInputWithdrawalRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberrga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:MeasurementInputWithdrawalRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-12-310000898174rga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2021-09-300000898174rga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2021-09-300000898174srt:WeightedAverageMemberrga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-09-300000898174rga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2020-12-310000898174rga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberrga:EmbeddedDerivativesInIndexedAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-12-310000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:EmbeddedDerivativesInVariableAnnuityMember2021-09-300000898174us-gaap:IncomeApproachValuationTechniqueMemberrga:EmbeddedDerivativesInVariableAnnuityMember2020-12-310000898174rga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:MeasurementInputMortalityRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2021-09-300000898174rga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:MeasurementInputMortalityRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2021-09-300000898174srt:WeightedAverageMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:MeasurementInputMortalityRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-09-300000898174rga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:MeasurementInputMortalityRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2020-12-310000898174rga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:MeasurementInputMortalityRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:MeasurementInputMortalityRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-12-310000898174us-gaap:MeasurementInputLapseRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2021-09-300000898174us-gaap:MeasurementInputLapseRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2021-09-300000898174us-gaap:MeasurementInputLapseRateMembersrt:WeightedAverageMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-09-300000898174us-gaap:MeasurementInputLapseRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2020-12-310000898174us-gaap:MeasurementInputLapseRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2020-12-310000898174us-gaap:MeasurementInputLapseRateMembersrt:WeightedAverageMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-12-310000898174us-gaap:MeasurementInputWithdrawalRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2021-09-300000898174us-gaap:MeasurementInputWithdrawalRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2021-09-300000898174srt:WeightedAverageMemberus-gaap:MeasurementInputWithdrawalRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-09-300000898174us-gaap:MeasurementInputWithdrawalRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2020-12-310000898174us-gaap:MeasurementInputWithdrawalRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberus-gaap:MeasurementInputWithdrawalRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-12-310000898174us-gaap:MeasurementInputCounterpartyCreditRiskMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2021-09-300000898174us-gaap:MeasurementInputCounterpartyCreditRiskMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2021-09-300000898174srt:WeightedAverageMemberus-gaap:MeasurementInputCounterpartyCreditRiskMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-09-300000898174us-gaap:MeasurementInputCounterpartyCreditRiskMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2020-12-310000898174us-gaap:MeasurementInputCounterpartyCreditRiskMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberus-gaap:MeasurementInputCounterpartyCreditRiskMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-12-310000898174us-gaap:MeasurementInputLongTermRevenueGrowthRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2021-09-300000898174us-gaap:MeasurementInputLongTermRevenueGrowthRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2021-09-300000898174srt:WeightedAverageMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-09-300000898174us-gaap:MeasurementInputLongTermRevenueGrowthRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMember2020-12-310000898174us-gaap:MeasurementInputLongTermRevenueGrowthRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMember2020-12-310000898174srt:WeightedAverageMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberrga:EmbeddedDerivativesInVariableAnnuityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-12-310000898174us-gaap:CorporateDebtSecuritiesMember2021-06-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMember2021-06-300000898174us-gaap:StructuredFinanceMember2021-06-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMember2021-06-300000898174us-gaap:EquitySecuritiesMember2021-06-300000898174us-gaap:ShortTermInvestmentsMember2021-06-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMember2021-06-300000898174us-gaap:OtherAssetsMember2021-06-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMember2021-06-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:InvestmentIncomeMember2021-07-012021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:InvestmentIncomeMember2021-07-012021-09-300000898174us-gaap:StructuredFinanceMemberus-gaap:InvestmentIncomeMember2021-07-012021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:InvestmentIncomeMember2021-07-012021-09-300000898174us-gaap:EquitySecuritiesMemberus-gaap:InvestmentIncomeMember2021-07-012021-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:InvestmentIncomeMember2021-07-012021-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:InvestmentIncomeMember2021-07-012021-09-300000898174us-gaap:OtherAssetsMemberus-gaap:InvestmentIncomeMember2021-07-012021-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:InvestmentIncomeMember2021-07-012021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberrga:InvestmentRelatedGainsLossesMember2021-07-012021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberrga:InvestmentRelatedGainsLossesMember2021-07-012021-09-300000898174us-gaap:StructuredFinanceMemberrga:InvestmentRelatedGainsLossesMember2021-07-012021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberrga:InvestmentRelatedGainsLossesMember2021-07-012021-09-300000898174us-gaap:EquitySecuritiesMemberrga:InvestmentRelatedGainsLossesMember2021-07-012021-09-300000898174us-gaap:ShortTermInvestmentsMemberrga:InvestmentRelatedGainsLossesMember2021-07-012021-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberrga:InvestmentRelatedGainsLossesMember2021-07-012021-09-300000898174us-gaap:OtherAssetsMemberrga:InvestmentRelatedGainsLossesMember2021-07-012021-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberrga:InvestmentRelatedGainsLossesMember2021-07-012021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:InterestIncomeMember2021-07-012021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:InterestIncomeMember2021-07-012021-09-300000898174us-gaap:StructuredFinanceMemberus-gaap:InterestIncomeMember2021-07-012021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:InterestIncomeMember2021-07-012021-09-300000898174us-gaap:EquitySecuritiesMemberus-gaap:InterestIncomeMember2021-07-012021-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:InterestIncomeMember2021-07-012021-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:InterestIncomeMember2021-07-012021-09-300000898174us-gaap:OtherAssetsMemberus-gaap:InterestIncomeMember2021-07-012021-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:InterestIncomeMember2021-07-012021-09-300000898174us-gaap:CorporateDebtSecuritiesMember2021-07-012021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMember2021-07-012021-09-300000898174us-gaap:StructuredFinanceMember2021-07-012021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMember2021-07-012021-09-300000898174us-gaap:EquitySecuritiesMember2021-07-012021-09-300000898174us-gaap:ShortTermInvestmentsMember2021-07-012021-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMember2021-07-012021-09-300000898174us-gaap:OtherAssetsMember2021-07-012021-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMember2021-07-012021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:OtherIncomeMember2021-07-012021-09-300000898174us-gaap:OtherIncomeMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-07-012021-09-300000898174us-gaap:OtherIncomeMemberus-gaap:StructuredFinanceMember2021-07-012021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:OtherIncomeMember2021-07-012021-09-300000898174us-gaap:OtherIncomeMemberus-gaap:EquitySecuritiesMember2021-07-012021-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:OtherIncomeMember2021-07-012021-09-300000898174us-gaap:OtherIncomeMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMember2021-07-012021-09-300000898174us-gaap:OtherIncomeMemberus-gaap:OtherAssetsMember2021-07-012021-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:OtherIncomeMember2021-07-012021-09-300000898174us-gaap:StructuredFinanceMember2021-09-300000898174us-gaap:EquitySecuritiesMember2021-09-300000898174us-gaap:ShortTermInvestmentsMember2021-09-300000898174us-gaap:OtherAssetsMember2021-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMember2021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2021-07-012021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2021-07-012021-09-300000898174us-gaap:StructuredFinanceMemberus-gaap:OtherComprehensiveIncomeMember2021-07-012021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2021-07-012021-09-300000898174us-gaap:EquitySecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2021-07-012021-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:OtherComprehensiveIncomeMember2021-07-012021-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:OtherComprehensiveIncomeMember2021-07-012021-09-300000898174us-gaap:OtherAssetsMemberus-gaap:OtherComprehensiveIncomeMember2021-07-012021-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:OtherComprehensiveIncomeMember2021-07-012021-09-300000898174us-gaap:StructuredFinanceMember2020-12-310000898174us-gaap:EquitySecuritiesMember2020-12-310000898174us-gaap:ShortTermInvestmentsMember2020-12-310000898174us-gaap:OtherAssetsMember2020-12-310000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMember2020-12-310000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:InvestmentIncomeMember2021-01-012021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:InvestmentIncomeMember2021-01-012021-09-300000898174us-gaap:StructuredFinanceMemberus-gaap:InvestmentIncomeMember2021-01-012021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:InvestmentIncomeMember2021-01-012021-09-300000898174us-gaap:EquitySecuritiesMemberus-gaap:InvestmentIncomeMember2021-01-012021-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:InvestmentIncomeMember2021-01-012021-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:InvestmentIncomeMember2021-01-012021-09-300000898174us-gaap:OtherAssetsMemberus-gaap:InvestmentIncomeMember2021-01-012021-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:InvestmentIncomeMember2021-01-012021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberrga:InvestmentRelatedGainsLossesMember2021-01-012021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberrga:InvestmentRelatedGainsLossesMember2021-01-012021-09-300000898174us-gaap:StructuredFinanceMemberrga:InvestmentRelatedGainsLossesMember2021-01-012021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberrga:InvestmentRelatedGainsLossesMember2021-01-012021-09-300000898174us-gaap:EquitySecuritiesMemberrga:InvestmentRelatedGainsLossesMember2021-01-012021-09-300000898174us-gaap:ShortTermInvestmentsMemberrga:InvestmentRelatedGainsLossesMember2021-01-012021-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberrga:InvestmentRelatedGainsLossesMember2021-01-012021-09-300000898174us-gaap:OtherAssetsMemberrga:InvestmentRelatedGainsLossesMember2021-01-012021-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberrga:InvestmentRelatedGainsLossesMember2021-01-012021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:InterestIncomeMember2021-01-012021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:InterestIncomeMember2021-01-012021-09-300000898174us-gaap:StructuredFinanceMemberus-gaap:InterestIncomeMember2021-01-012021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:InterestIncomeMember2021-01-012021-09-300000898174us-gaap:EquitySecuritiesMemberus-gaap:InterestIncomeMember2021-01-012021-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:InterestIncomeMember2021-01-012021-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:InterestIncomeMember2021-01-012021-09-300000898174us-gaap:OtherAssetsMemberus-gaap:InterestIncomeMember2021-01-012021-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:InterestIncomeMember2021-01-012021-09-300000898174us-gaap:CorporateDebtSecuritiesMember2021-01-012021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMember2021-01-012021-09-300000898174us-gaap:StructuredFinanceMember2021-01-012021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMember2021-01-012021-09-300000898174us-gaap:EquitySecuritiesMember2021-01-012021-09-300000898174us-gaap:ShortTermInvestmentsMember2021-01-012021-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMember2021-01-012021-09-300000898174us-gaap:OtherAssetsMember2021-01-012021-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMember2021-01-012021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:OtherIncomeMember2021-01-012021-09-300000898174us-gaap:OtherIncomeMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-01-012021-09-300000898174us-gaap:OtherIncomeMemberus-gaap:StructuredFinanceMember2021-01-012021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:OtherIncomeMember2021-01-012021-09-300000898174us-gaap:OtherIncomeMemberus-gaap:EquitySecuritiesMember2021-01-012021-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:OtherIncomeMember2021-01-012021-09-300000898174us-gaap:OtherIncomeMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMember2021-01-012021-09-300000898174us-gaap:OtherIncomeMemberus-gaap:OtherAssetsMember2021-01-012021-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:OtherIncomeMember2021-01-012021-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2021-01-012021-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2021-01-012021-09-300000898174us-gaap:StructuredFinanceMemberus-gaap:OtherComprehensiveIncomeMember2021-01-012021-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2021-01-012021-09-300000898174us-gaap:EquitySecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2021-01-012021-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:OtherComprehensiveIncomeMember2021-01-012021-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:OtherComprehensiveIncomeMember2021-01-012021-09-300000898174us-gaap:OtherAssetsMemberus-gaap:OtherComprehensiveIncomeMember2021-01-012021-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:OtherComprehensiveIncomeMember2021-01-012021-09-300000898174us-gaap:CorporateDebtSecuritiesMember2020-06-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMember2020-06-300000898174us-gaap:StructuredFinanceMember2020-06-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMember2020-06-300000898174us-gaap:EquitySecuritiesMember2020-06-300000898174us-gaap:ShortTermInvestmentsMember2020-06-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMember2020-06-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMember2020-06-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:InvestmentIncomeMember2020-07-012020-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:InvestmentIncomeMember2020-07-012020-09-300000898174us-gaap:StructuredFinanceMemberus-gaap:InvestmentIncomeMember2020-07-012020-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:InvestmentIncomeMember2020-07-012020-09-300000898174us-gaap:EquitySecuritiesMemberus-gaap:InvestmentIncomeMember2020-07-012020-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:InvestmentIncomeMember2020-07-012020-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:InvestmentIncomeMember2020-07-012020-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:InvestmentIncomeMember2020-07-012020-09-300000898174us-gaap:CorporateDebtSecuritiesMemberrga:InvestmentRelatedGainsLossesMember2020-07-012020-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberrga:InvestmentRelatedGainsLossesMember2020-07-012020-09-300000898174us-gaap:StructuredFinanceMemberrga:InvestmentRelatedGainsLossesMember2020-07-012020-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberrga:InvestmentRelatedGainsLossesMember2020-07-012020-09-300000898174us-gaap:EquitySecuritiesMemberrga:InvestmentRelatedGainsLossesMember2020-07-012020-09-300000898174us-gaap:ShortTermInvestmentsMemberrga:InvestmentRelatedGainsLossesMember2020-07-012020-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberrga:InvestmentRelatedGainsLossesMember2020-07-012020-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberrga:InvestmentRelatedGainsLossesMember2020-07-012020-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:InterestIncomeMember2020-07-012020-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:InterestIncomeMember2020-07-012020-09-300000898174us-gaap:StructuredFinanceMemberus-gaap:InterestIncomeMember2020-07-012020-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:InterestIncomeMember2020-07-012020-09-300000898174us-gaap:EquitySecuritiesMemberus-gaap:InterestIncomeMember2020-07-012020-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:InterestIncomeMember2020-07-012020-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:InterestIncomeMember2020-07-012020-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:InterestIncomeMember2020-07-012020-09-300000898174us-gaap:CorporateDebtSecuritiesMember2020-07-012020-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMember2020-07-012020-09-300000898174us-gaap:StructuredFinanceMember2020-07-012020-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMember2020-07-012020-09-300000898174us-gaap:EquitySecuritiesMember2020-07-012020-09-300000898174us-gaap:ShortTermInvestmentsMember2020-07-012020-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMember2020-07-012020-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMember2020-07-012020-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:OtherIncomeMember2020-07-012020-09-300000898174us-gaap:OtherIncomeMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-07-012020-09-300000898174us-gaap:OtherIncomeMemberus-gaap:StructuredFinanceMember2020-07-012020-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:OtherIncomeMember2020-07-012020-09-300000898174us-gaap:OtherIncomeMemberus-gaap:EquitySecuritiesMember2020-07-012020-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:OtherIncomeMember2020-07-012020-09-300000898174us-gaap:OtherIncomeMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMember2020-07-012020-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:OtherIncomeMember2020-07-012020-09-300000898174us-gaap:CorporateDebtSecuritiesMember2020-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMember2020-09-300000898174us-gaap:StructuredFinanceMember2020-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMember2020-09-300000898174us-gaap:EquitySecuritiesMember2020-09-300000898174us-gaap:ShortTermInvestmentsMember2020-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMember2020-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMember2020-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2020-07-012020-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2020-07-012020-09-300000898174us-gaap:StructuredFinanceMemberus-gaap:OtherComprehensiveIncomeMember2020-07-012020-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2020-07-012020-09-300000898174us-gaap:EquitySecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2020-07-012020-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:OtherComprehensiveIncomeMember2020-07-012020-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:OtherComprehensiveIncomeMember2020-07-012020-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:OtherComprehensiveIncomeMember2020-07-012020-09-300000898174us-gaap:CorporateDebtSecuritiesMember2019-12-310000898174us-gaap:ForeignGovernmentDebtSecuritiesMember2019-12-310000898174us-gaap:StructuredFinanceMember2019-12-310000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMember2019-12-310000898174us-gaap:EquitySecuritiesMember2019-12-310000898174us-gaap:ShortTermInvestmentsMember2019-12-310000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMember2019-12-310000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMember2019-12-310000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:InvestmentIncomeMember2020-01-012020-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:InvestmentIncomeMember2020-01-012020-09-300000898174us-gaap:StructuredFinanceMemberus-gaap:InvestmentIncomeMember2020-01-012020-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:InvestmentIncomeMember2020-01-012020-09-300000898174us-gaap:EquitySecuritiesMemberus-gaap:InvestmentIncomeMember2020-01-012020-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:InvestmentIncomeMember2020-01-012020-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:InvestmentIncomeMember2020-01-012020-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:InvestmentIncomeMember2020-01-012020-09-300000898174us-gaap:CorporateDebtSecuritiesMemberrga:InvestmentRelatedGainsLossesMember2020-01-012020-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberrga:InvestmentRelatedGainsLossesMember2020-01-012020-09-300000898174us-gaap:StructuredFinanceMemberrga:InvestmentRelatedGainsLossesMember2020-01-012020-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberrga:InvestmentRelatedGainsLossesMember2020-01-012020-09-300000898174us-gaap:EquitySecuritiesMemberrga:InvestmentRelatedGainsLossesMember2020-01-012020-09-300000898174us-gaap:ShortTermInvestmentsMemberrga:InvestmentRelatedGainsLossesMember2020-01-012020-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberrga:InvestmentRelatedGainsLossesMember2020-01-012020-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberrga:InvestmentRelatedGainsLossesMember2020-01-012020-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:InterestIncomeMember2020-01-012020-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:InterestIncomeMember2020-01-012020-09-300000898174us-gaap:StructuredFinanceMemberus-gaap:InterestIncomeMember2020-01-012020-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:InterestIncomeMember2020-01-012020-09-300000898174us-gaap:EquitySecuritiesMemberus-gaap:InterestIncomeMember2020-01-012020-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:InterestIncomeMember2020-01-012020-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:InterestIncomeMember2020-01-012020-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:InterestIncomeMember2020-01-012020-09-300000898174us-gaap:CorporateDebtSecuritiesMember2020-01-012020-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMember2020-01-012020-09-300000898174us-gaap:StructuredFinanceMember2020-01-012020-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMember2020-01-012020-09-300000898174us-gaap:EquitySecuritiesMember2020-01-012020-09-300000898174us-gaap:ShortTermInvestmentsMember2020-01-012020-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMember2020-01-012020-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMember2020-01-012020-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:OtherIncomeMember2020-01-012020-09-300000898174us-gaap:OtherIncomeMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-01-012020-09-300000898174us-gaap:OtherIncomeMemberus-gaap:StructuredFinanceMember2020-01-012020-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:OtherIncomeMember2020-01-012020-09-300000898174us-gaap:OtherIncomeMemberus-gaap:EquitySecuritiesMember2020-01-012020-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:OtherIncomeMember2020-01-012020-09-300000898174us-gaap:OtherIncomeMemberrga:FundsWithheldAtInterestEmbeddedDerivativesMember2020-01-012020-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:OtherIncomeMember2020-01-012020-09-300000898174us-gaap:CorporateDebtSecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2020-01-012020-09-300000898174us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2020-01-012020-09-300000898174us-gaap:StructuredFinanceMemberus-gaap:OtherComprehensiveIncomeMember2020-01-012020-09-300000898174us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2020-01-012020-09-300000898174us-gaap:EquitySecuritiesMemberus-gaap:OtherComprehensiveIncomeMember2020-01-012020-09-300000898174us-gaap:ShortTermInvestmentsMemberus-gaap:OtherComprehensiveIncomeMember2020-01-012020-09-300000898174rga:FundsWithheldAtInterestEmbeddedDerivativesMemberus-gaap:OtherComprehensiveIncomeMember2020-01-012020-09-300000898174rga:InterestSensitiveContractLiabilitiesEmbeddedDerivativesMemberus-gaap:OtherComprehensiveIncomeMember2020-01-012020-09-300000898174us-gaap:CarryingReportedAmountFairValueDisclosureMember2021-09-300000898174us-gaap:EstimateOfFairValueFairValueDisclosureMember2021-09-300000898174us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel1Member2021-09-300000898174us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel2Member2021-09-300000898174us-gaap:FairValueInputsLevel3Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-09-300000898174us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-09-300000898174us-gaap:CarryingReportedAmountFairValueDisclosureMember2020-12-310000898174us-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310000898174us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel1Member2020-12-310000898174us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel2Member2020-12-310000898174us-gaap:FairValueInputsLevel3Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310000898174us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2021-07-012021-09-300000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2020-07-012020-09-300000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2021-01-012021-09-300000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2020-01-012020-09-300000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2021-07-012021-09-300000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2020-07-012020-09-300000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2021-01-012021-09-300000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2020-01-012020-09-300000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMember2021-07-012021-09-300000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMember2020-07-012020-09-300000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMember2021-01-012021-09-300000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMember2020-01-012020-09-300000898174country:CAus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2021-07-012021-09-300000898174country:CAus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2020-07-012020-09-300000898174country:CAus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2021-01-012021-09-300000898174country:CAus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2020-01-012020-09-300000898174country:CAus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2021-07-012021-09-300000898174country:CAus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2020-07-012020-09-300000898174country:CAus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2021-01-012021-09-300000898174country:CAus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2020-01-012020-09-300000898174country:CAus-gaap:AllOtherSegmentsMember2021-07-012021-09-300000898174country:CAus-gaap:AllOtherSegmentsMember2020-07-012020-09-300000898174country:CAus-gaap:AllOtherSegmentsMember2021-01-012021-09-300000898174country:CAus-gaap:AllOtherSegmentsMember2020-01-012020-09-300000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2021-07-012021-09-300000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2020-07-012020-09-300000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2021-01-012021-09-300000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2020-01-012020-09-300000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2021-07-012021-09-300000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2020-07-012020-09-300000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2021-01-012021-09-300000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2020-01-012020-09-300000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMember2021-07-012021-09-300000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMember2020-07-012020-09-300000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMember2021-01-012021-09-300000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMember2020-01-012020-09-300000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2021-07-012021-09-300000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2020-07-012020-09-300000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2021-01-012021-09-300000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2020-01-012020-09-300000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2021-07-012021-09-300000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2020-07-012020-09-300000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2021-01-012021-09-300000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2020-01-012020-09-300000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMember2021-07-012021-09-300000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMember2020-07-012020-09-300000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMember2021-01-012021-09-300000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMember2020-01-012020-09-300000898174us-gaap:CorporateAndOtherMember2021-07-012021-09-300000898174us-gaap:CorporateAndOtherMember2020-07-012020-09-300000898174us-gaap:CorporateAndOtherMember2021-01-012021-09-300000898174us-gaap:CorporateAndOtherMember2020-01-012020-09-300000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2021-09-300000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2020-12-310000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2021-09-300000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2020-12-310000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMember2021-09-300000898174srt:AmericasMemberus-gaap:AllOtherSegmentsMember2020-12-310000898174country:CAus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2021-09-300000898174country:CAus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2020-12-310000898174country:CAus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2021-09-300000898174country:CAus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2020-12-310000898174country:CAus-gaap:AllOtherSegmentsMember2021-09-300000898174country:CAus-gaap:AllOtherSegmentsMember2020-12-310000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2021-09-300000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2020-12-310000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2021-09-300000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2020-12-310000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMember2021-09-300000898174us-gaap:EMEAMemberus-gaap:AllOtherSegmentsMember2020-12-310000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2021-09-300000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMemberus-gaap:LifeInsuranceSegmentMember2020-12-310000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2021-09-300000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMemberus-gaap:NontraditionalLongDurationContractsMember2020-12-310000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMember2021-09-300000898174srt:AsiaPacificMemberus-gaap:AllOtherSegmentsMember2020-12-310000898174us-gaap:CorporateAndOtherMember2021-09-300000898174us-gaap:CorporateAndOtherMember2020-12-310000898174us-gaap:LimitedPartnerMember2021-09-300000898174us-gaap:LimitedPartnerMember2020-12-310000898174us-gaap:CommercialLoanMember2021-09-300000898174us-gaap:CommercialLoanMember2020-12-310000898174us-gaap:BankLoanObligationsMember2021-09-300000898174us-gaap:BankLoanObligationsMember2020-12-310000898174rga:EquityReleaseMortgagesMember2021-09-300000898174rga:EquityReleaseMortgagesMember2020-12-310000898174rga:CommitmentPeriodTwoThousandThirtyFourMember2021-09-300000898174rga:CommitmentPeriodTwoThousandThirtyFiveMember2021-09-300000898174rga:CommitmentPeriodTwoThousandThirtySixMember2021-09-300000898174rga:CommitmentPeriodTwoThousandThirtySevenMember2021-09-300000898174rga:CommitmentPeriodTwoThousandThirtyEightMember2021-09-300000898174rga:CommitmentPeriodTwoThousandThirtyNineMember2021-09-300000898174rga:CommitmentPeriodTwoThousandFortySixMember2021-09-300000898174rga:InsuranceTreatyGuaranteeMember2021-09-300000898174rga:InsuranceTreatyGuaranteeMember2020-12-310000898174rga:InsuranceTreatyGuaranteeNetOfAssetsHeldInTrustMember2021-09-300000898174rga:InsuranceTreatyGuaranteeNetOfAssetsHeldInTrustMember2020-12-310000898174rga:GuaranteeOfBorrowedSecuritiesMember2021-09-300000898174rga:GuaranteeOfBorrowedSecuritiesMember2020-12-310000898174us-gaap:PensionPlansDefinedBenefitMember2021-07-012021-09-300000898174us-gaap:PensionPlansDefinedBenefitMember2020-07-012020-09-300000898174us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-07-012021-09-300000898174us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-07-012020-09-300000898174us-gaap:PensionPlansDefinedBenefitMember2021-01-012021-09-300000898174us-gaap:PensionPlansDefinedBenefitMember2020-01-012020-09-300000898174us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-01-012021-09-300000898174us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-01-012020-09-300000898174srt:AMBestAMinusRatingMember2020-01-012020-12-310000898174srt:AMBestAMinusRatingMember2021-01-012021-09-300000898174us-gaap:ReinsurerConcentrationRiskMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerAMember2021-09-300000898174us-gaap:ReinsurerConcentrationRiskMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerAMember2021-01-012021-09-300000898174us-gaap:ReinsurerConcentrationRiskMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerAMember2020-12-310000898174us-gaap:ReinsurerConcentrationRiskMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerAMember2020-01-012020-12-310000898174us-gaap:ReinsurerConcentrationRiskMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerBMember2021-09-300000898174us-gaap:ReinsurerConcentrationRiskMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerBMember2021-01-012021-09-300000898174us-gaap:ReinsurerConcentrationRiskMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerBMember2020-12-310000898174us-gaap:ReinsurerConcentrationRiskMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerBMember2020-01-012020-12-310000898174rga:ReinsurerCMemberus-gaap:ReinsurerConcentrationRiskMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMember2021-09-300000898174rga:ReinsurerCMemberus-gaap:ReinsurerConcentrationRiskMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMember2021-01-012021-09-300000898174rga:ReinsurerCMemberus-gaap:ReinsurerConcentrationRiskMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMember2020-12-310000898174rga:ReinsurerCMemberus-gaap:ReinsurerConcentrationRiskMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMember2020-01-012020-12-310000898174srt:AMBestARatingMemberus-gaap:ReinsurerConcentrationRiskMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerDMember2021-09-300000898174srt:AMBestARatingMemberus-gaap:ReinsurerConcentrationRiskMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerDMember2021-01-012021-09-300000898174srt:AMBestARatingMemberus-gaap:ReinsurerConcentrationRiskMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerDMember2020-12-310000898174srt:AMBestARatingMemberus-gaap:ReinsurerConcentrationRiskMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerDMember2020-01-012020-12-310000898174us-gaap:ReinsurerConcentrationRiskMemberrga:ReinsurerEMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMember2021-09-300000898174us-gaap:ReinsurerConcentrationRiskMemberrga:ReinsurerEMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMember2021-01-012021-09-300000898174us-gaap:ReinsurerConcentrationRiskMemberrga:ReinsurerEMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMember2020-12-310000898174us-gaap:ReinsurerConcentrationRiskMemberrga:ReinsurerEMembersrt:AMBestAPlusRatingMemberus-gaap:ReinsuranceRecoverableMember2020-01-012020-12-310000898174srt:AMBestAPlusPlusRatingMemberus-gaap:ReinsurerConcentrationRiskMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerFMember2021-09-300000898174srt:AMBestAPlusPlusRatingMemberus-gaap:ReinsurerConcentrationRiskMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerFMember2021-01-012021-09-300000898174srt:AMBestAPlusPlusRatingMemberus-gaap:ReinsurerConcentrationRiskMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerFMember2020-12-310000898174srt:AMBestAPlusPlusRatingMemberus-gaap:ReinsurerConcentrationRiskMemberus-gaap:ReinsuranceRecoverableMemberrga:ReinsurerFMember2020-01-012020-12-310000898174us-gaap:ReinsurerConcentrationRiskMemberrga:OtherReinsurersMemberus-gaap:ReinsuranceRecoverableMember2021-09-300000898174us-gaap:ReinsurerConcentrationRiskMemberrga:OtherReinsurersMemberus-gaap:ReinsuranceRecoverableMember2021-01-012021-09-300000898174us-gaap:ReinsurerConcentrationRiskMemberrga:OtherReinsurersMemberus-gaap:ReinsuranceRecoverableMember2020-12-310000898174us-gaap:ReinsurerConcentrationRiskMemberrga:OtherReinsurersMemberus-gaap:ReinsuranceRecoverableMember2020-01-012020-12-310000898174us-gaap:ReinsurerConcentrationRiskMemberus-gaap:ReinsuranceRecoverableMember2021-09-300000898174us-gaap:ReinsurerConcentrationRiskMemberus-gaap:ReinsuranceRecoverableMember2021-01-012021-09-300000898174us-gaap:ReinsurerConcentrationRiskMemberus-gaap:ReinsuranceRecoverableMember2020-12-310000898174us-gaap:ReinsurerConcentrationRiskMemberus-gaap:ReinsuranceRecoverableMember2020-01-012020-12-310000898174us-gaap:SeniorNotesMember2021-01-012021-09-300000898174us-gaap:SeniorNotesMember2021-09-300000898174rga:SeniorNotesDue2021Member2021-09-300000898174us-gaap:AccountingStandardsUpdate201613Member2021-01-012021-09-30
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-Q
QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended September 30, 2021
 OR
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934
Commission File Number 1-11848
REINSURANCE GROUP OF AMERICA, INCORPORATED
(Exact name of Registrant as specified in its charter)
Missouri  43-1627032
(State or other jurisdiction                    (IRS employer
of incorporation or organization)    identification number)
16600 Swingley Ridge Road
Chesterfield, Missouri 63017
(Address of principal executive offices)
(636) 736-7000
(Registrant’s telephone number, including area code)
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.
Yes x  No o
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).
Yes   No o
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Large accelerated filer x     Accelerated filer o     Non-accelerated filer o     
Smaller reporting company      Emerging growth company
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes   No
Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading Symbol(s)Name of each exchange on which registered
Common Stock, par value $0.01RGANew York Stock Exchange
6.20% Fixed-To-Floating Rate Subordinated Debentures due 2042RZANew York Stock Exchange
5.75% Fixed-To-Floating Rate Subordinated Debentures due 2056RZBNew York Stock Exchange
As of October 31, 2021, 67,600,151 shares of the registrant’s common stock were outstanding.


REINSURANCE GROUP OF AMERICA, INCORPORATED AND SUBSIDIARIES
TABLE OF CONTENTS
 
Item     Page
  PART I – FINANCIAL INFORMATION  
1    
    
    
    
    
    
     3. Equity
     4. Investments
     9. Income Tax
2    
3    
4    
  PART II – OTHER INFORMATION  
1    
1A    
2    
6    
    
    

2

PART I - FINANCIAL INFORMATION
ITEM 1. Financial Statements

REINSURANCE GROUP OF AMERICA, INCORPORATED AND SUBSIDIARIES
CONDENSED CONSOLIDATED BALANCE SHEETS
(Unaudited)
September 30,
2021
December 31,
2020
(Dollars in millions, except share data)
 
Assets
Fixed maturity securities available-for-sale, at fair value (amortized cost of $54,347 and $49,548; allowance for credit losses of $17 and $20)
$59,289 $56,735 
Equity securities, at fair value160 132 
Mortgage loans on real estate (net of allowance for credit losses of $39 and $64)
6,366 5,787 
Policy loans1,234 1,258 
Funds withheld at interest7,034 5,432 
Short-term investments82 227 
Other invested assets3,404 2,829 
Total investments77,569 72,400 
Cash and cash equivalents3,027 3,408 
Accrued investment income574 511 
Premiums receivable and other reinsurance balances3,013 2,842 
Reinsurance ceded receivables and other2,585 983 
Deferred policy acquisition costs3,687 3,616 
Other assets994 896 
Total assets$91,449 $84,656 
Liabilities and Stockholders’ Equity
Future policy benefits$35,666 $31,453 
Interest-sensitive contract liabilities26,017 23,276 
Other policy claims and benefits7,117 6,413 
Other reinsurance balances543 598 
Deferred income taxes2,407 3,263 
Other liabilities3,327 1,340 
Long-term debt3,173 3,573 
Collateral finance and securitization notes314 388 
Total liabilities78,564 70,304 
Commitments and contingent liabilities (See Note 8)
Stockholders’ Equity:
Preferred stock – par value $0.01 per share, 10,000,000 shares authorized, no shares issued or outstanding
  
Common stock – par value $0.01 per share, 140,000,000 shares authorized, 85,310,598 shares issued at September 30, 2021 and December 31, 2020
1 1 
Additional paid-in capital2,447 2,406 
Retained earnings8,458 8,148 
Treasury stock, at cost – 17,710,775 and 17,353,697 shares
(1,604)(1,562)
Accumulated other comprehensive income3,583 5,359 
Total stockholders’ equity12,885 14,352 
Total liabilities and stockholders’ equity$91,449 $84,656 
See accompanying notes to condensed consolidated financial statements (unaudited).
3

REINSURANCE GROUP OF AMERICA, INCORPORATED AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
(Unaudited)
 
 Three months ended September 30,Nine months ended September 30,
 2021202020212020
Revenues:(Dollars in millions, except per share data)
Net premiums$3,094 $2,825 $9,106 $8,434 
Investment income, net of related expenses796 654 2,367 1,893 
Investment related gains (losses), net58 66 472 (138)
Other revenues95 98 354 264 
Total revenues4,043 3,643 12,299 10,453 
Benefits and Expenses:
Claims and other policy benefits3,289 2,530 9,294 7,894 
Interest credited177 196 541 529 
Policy acquisition costs and other insurance expenses338 374 1,010 912 
Other operating expenses229 211 683