0.03Large Accelerated Filer2020False0.06YesFY0000005272TrueP1Y--12-31P2YP3YP3Y51000000005002.55000000000P2YP3YP1YP3Yus-gaap:OtherAssetsus-gaap:OtherLiabilitiesus-gaap:OtherAssets0.01YesNoYes0.01 0000005272 2019-01-01 2019-12-31 0000005272 aig:OtherProductLinesMember 2020-01-01 2020-12-31 0000005272 aig:PurchasedCreditImpairedSecuritiesMember 2019-12-31 0000005272 us-gaap:OtherContractMember 2020-01-01 2020-12-31 0000005272 aig:CommercialIndustrialFinancingReceivableMember 2020-12-31 0000005272 aig:LiabilitiesMember 2020-01-01 2020-12-31 0000005272 aig:ShortDurationInsuranceMember 2020-01-01 2020-12-31 0000005272 aig:UsPersonalInsuranceMember 2020-12-31 0000005272 us-gaap:ForeignExchangeContractMember 2020-01-01 2020-12-31 0000005272 us-gaap:PerformanceSharesMember aig:LongTermIncentivePlanYearFiveMember 2020-12-31 0000005272 us-gaap:CreditRiskContractMember 2020-01-01 2020-12-31 0000005272 aig:BondsTradingSecuritiesMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2019-01-01 2019-12-31 0000005272 us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:ForeignExchangeContractMember 2020-12-31 0000005272 aig:FairValueOptionElectionMember 2020-01-01 2020-12-31 0000005272 aig:NetOfImpactOfAdverseDevelopmentReinsuranceCoverMember aig:UsExcessCasualtyMember 2020-12-31 0000005272 2017-12-31 0000005272 aig:GeneralInsuranceMember 2019-01-01 2019-12-31 0000005272 aig:OtherMortgagesMember 2018-01-01 2018-12-31 0000005272 2018-01-01 2018-12-31 0000005272 2020-01-01 2020-12-31 0000005272 aig:DeferredStockUnitsMember 2019-01-01 2019-12-31 0000005272 us-gaap:CommonStockMember 2018-12-31 0000005272 us-gaap:AllowanceForUncollectiblePremiumsReceivableMember 2018-01-01 2018-12-31 0000005272 aig:GeneralInsuranceMember 2020-01-01 2020-12-31 0000005272 us-gaap:ForeignExchangeContractMember 2019-01-01 2019-12-31 0000005272 2019-12-31 0000005272 us-gaap:CorporateAndOtherMember 2019-12-31 0000005272 us-gaap:DomesticCountryMember 2019-12-31 0000005272 us-gaap:SecuredDebtMember aig:GuaranteedInvestmentAgreementsMember srt:MinimumMember 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:USStatesAndPoliticalSubdivisionsMember 2019-12-31 0000005272 aig:AllowanceForMortgageAndOtherLoansReceivableMember 2019-12-31 0000005272 us-gaap:NotesPayableOtherPayablesMember us-gaap:SecuredDebtMember 2020-12-31 0000005272 2020-12-31 0000005272 country:US aig:InsuranceContractsMember us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member 2019-12-31 0000005272 aig:InternationalMember 2018-12-31 0000005272 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember aig:AffordableHousingPartnershipMember 2019-12-31 0000005272 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2018-01-01 2018-12-31 0000005272 us-gaap:CorporateAndOtherMember 2018-01-01 2018-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember 2020-01-01 2020-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember srt:MinimumMember aig:MeasurementInputConstantDefaultRateMember 2019-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember 2019-12-31 0000005272 us-gaap:MoneyMarketFundsMember 2020-12-31 0000005272 aig:LongDurationInsuranceMember 2018-01-01 2018-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember 2020-12-31 0000005272 us-gaap:FederalHomeLoanBankCertificatesAndObligationsFHLBMember 2019-12-31 0000005272 aig:InsuranceContractsMember us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member 2019-12-31 0000005272 srt:NorthAmericaMember 2020-12-31 0000005272 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2020-01-01 2020-12-31 0000005272 aig:MortgageAndOtherLoansReceivableMember 2020-12-31 0000005272 aig:OtherInvestedAssetsMember 2019-01-01 2019-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember 2020-12-31 0000005272 us-gaap:NotesPayableOtherPayablesMember us-gaap:UnsecuredDebtMember aig:ValidusHoldingsLtdMember 2020-12-31 0000005272 aig:UsPropertyAndSpecialRisksMember aig:AdverseDevelopmentReinsuranceMember aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member 2020-01-01 2020-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:EquityContractMember 2019-01-01 2019-12-31 0000005272 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember 2019-01-01 2019-12-31 0000005272 us-gaap:AccumulatedTranslationAdjustmentMember 2018-12-31 0000005272 aig:NetOfImpactOfAdverseDevelopmentReinsuranceCoverMember aig:UsPropertyAndSpecialRisksMember 2020-12-31 0000005272 us-gaap:OtherIncomeMember aig:BondsTradingSecuritiesMember 2020-01-01 2020-12-31 0000005272 us-gaap:NotesPayableOtherPayablesMember us-gaap:UnsecuredDebtMember 2020-01-01 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member us-gaap:AssetBackedSecuritiesMember 2019-12-31 0000005272 aig:SecuredFinancingsMember 2019-12-31 0000005272 us-gaap:FairValueInputsLevel1Member 2020-12-31 0000005272 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember aig:SecuritizationVehiclesMember 2020-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-01-01 2019-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0000005272 us-gaap:AccumulatedGainLossFinancialLiabilityFairValueOptionAttributableToParentMember 2020-01-01 2020-12-31 0000005272 aig:CommercialMortgageMember 2019-01-01 2019-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember 2020-01-01 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member aig:USEquitySecuritiesMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember 2019-01-01 2019-12-31 0000005272 aig:ShortDurationInsuranceMember srt:MaximumMember aig:NICOMember 2020-01-01 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member aig:USInvestmentGradeMember 2020-12-31 0000005272 aig:DeferredStockUnitsMember 2018-01-01 2018-12-31 0000005272 us-gaap:HedgeFundsEventDrivenMember 2020-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember 2020-12-31 0000005272 aig:OtherInvestedAssetsMember 2020-12-31 0000005272 aig:CommercialOfficesFinancingReceivableMember 2020-12-31 0000005272 aig:CommercialMortgageMember 2020-12-31 0000005272 us-gaap:AllowanceForUncollectiblePremiumsReceivableMember 2019-01-01 2019-12-31 0000005272 us-gaap:TreasuryStockMember 2018-01-01 2018-12-31 0000005272 us-gaap:EquitySecuritiesMember 2019-12-31 0000005272 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2019-12-31 0000005272 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember 2019-12-31 0000005272 aig:DebtNotGuaranteedMember aig:DebtOfConsolidatedInvestmentsMember 2019-12-31 0000005272 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2020-01-01 2020-12-31 0000005272 country:US us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-01-01 2019-12-31 0000005272 aig:NorthAmericaOperatingSegmentMember 2019-01-01 2019-12-31 0000005272 aig:PolicyholderContractDepositsMember 2020-12-31 0000005272 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember aig:SecuritizationVehiclesMember 2019-12-31 0000005272 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember aig:RealEstateAndInvestmentFundsMember 2019-12-31 0000005272 us-gaap:InterestRateContractMember 2019-01-01 2019-12-31 0000005272 aig:EquitySecuritiesAndMutualFundsMember 2020-12-31 0000005272 aig:OtherInvestedAssetsMember 2020-01-01 2020-12-31 0000005272 us-gaap:UnsecuredDebtMember 2020-12-31 0000005272 srt:MaximumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputBaseLapseRatesMember 2019-12-31 0000005272 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2020-12-31 0000005272 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember 2020-01-01 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2020-12-31 0000005272 aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember aig:UsWorkersCompensationMember 2017-12-31 0000005272 2018-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:CommercialMortgageBackedSecuritiesMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel12And3Member aig:ForeignEquitySecuritiesMember 2019-12-31 0000005272 us-gaap:DerivativeMember 2020-12-31 0000005272 country:US us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2020-01-01 2020-12-31 0000005272 aig:ValidusHoldingsLtdMember 2018-01-01 2018-12-31 0000005272 aig:ShortDurationInsuranceMember 2019-01-01 2019-12-31 0000005272 aig:CommercialIndustrialFinancingReceivableMember 2019-12-31 0000005272 us-gaap:SecuredDebtMember 2020-12-31 0000005272 aig:CommercialLoansOtherLoansAndNotesReceivableMember 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:CorporateDebtSecuritiesMember 2019-01-01 2019-12-31 0000005272 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember aig:OtherVIEMember 2020-12-31 0000005272 us-gaap:PreferredStockMember 2020-12-31 0000005272 aig:BondsTradingSecuritiesMember aig:NetRealizedCapitalGainsLossesMember 2020-01-01 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember 2019-01-01 2019-12-31 0000005272 country:US us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2020-12-31 0000005272 aig:UsPropertyAndSpecialRisksMember us-gaap:ShortDurationInsuranceContractAccidentYear2020Member 2020-12-31 0000005272 srt:MaximumMember us-gaap:EmployeeStockOptionMember 2020-01-01 2020-12-31 0000005272 us-gaap:BondsMember 2019-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:EmbeddedDerivativeFinancialInstrumentsMember 2019-12-31 0000005272 aig:CommercialMortgageMember 2019-01-01 2019-12-31 0000005272 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2020-12-31 0000005272 us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember 2019-12-31 0000005272 us-gaap:PublicUtilityEquitiesMember 2020-12-31 0000005272 aig:LifeAndRetirementMember 2019-01-01 2019-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:CreditRiskContractMember 2018-01-01 2018-12-31 0000005272 us-gaap:TreasuryStockMember 2020-12-31 0000005272 us-gaap:CorporateAndOtherMember 2019-01-01 2019-12-31 0000005272 us-gaap:AccumulatedOtherThanTemporaryImpairmentMember 2017-12-31 0000005272 aig:EuropeCasualtyAndFinancialLinesMember 2020-12-31 0000005272 aig:SecuredFinancingsMember us-gaap:MaturityUpTo30DaysMember 2020-12-31 0000005272 aig:CommercialHotelFinancingReceivableMember 2019-12-31 0000005272 aig:OtherInvestedAssetsMember 2018-12-31 0000005272 2018-12-26 2018-12-26 0000005272 aig:SecuredFinancingsMember aig:Maturity91To364DaysMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel3Member aig:IndexLifeMember aig:DiscountedCashflowValuationTechniqueMember 2020-12-31 0000005272 aig:FairValueOptionElectionMember aig:AlternativeFundsMember 2018-01-01 2018-12-31 0000005272 us-gaap:TreasuryStockMember 2019-12-31 0000005272 us-gaap:FixedMaturitiesMember 2020-12-31 0000005272 us-gaap:PublicUtilityBondsMember 2020-12-31 0000005272 aig:NetRealizedCapitalGainsLossesMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:FairValueHedgingMember us-gaap:InterestRateContractMember 2020-01-01 2020-12-31 0000005272 aig:LifeInsuranceCompaniesMember aig:DomesticMember 2019-01-01 2019-12-31 0000005272 us-gaap:EquityContractMember 2018-12-31 0000005272 country:US us-gaap:PensionCostsMember aig:BeforeAge65Member 2019-12-31 0000005272 aig:ValidusHoldingsLtdMember 2018-07-18 0000005272 aig:EuropeCasualtyAndFinancialLinesMember 2020-01-01 2020-12-31 0000005272 us-gaap:NotesPayableOtherPayablesMember us-gaap:SecuredDebtMember aig:AIGFPOperatingMember 2020-12-31 0000005272 us-gaap:PensionCostsMember aig:AigJapanPensionPlansMember 2019-12-31 0000005272 aig:DomesticMember aig:GeneralInsuranceMember 2020-01-01 2020-12-31 0000005272 aig:CommercialMortgageMember 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:NetRealizedCapitalGainsLossesMember 2019-01-01 2019-12-31 0000005272 us-gaap:EquityContractMember 2020-12-31 0000005272 us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember 2019-01-01 2019-12-31 0000005272 aig:OtherMortgagesMember 2020-12-31 0000005272 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember aig:OtherVIEMember 2019-12-31 0000005272 aig:LifeInsuranceCompaniesMember 2019-01-01 2019-12-31 0000005272 us-gaap:InvestmentIncomeMember aig:BondsAvailableForSaleSecuritiesMember 2020-01-01 2020-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember 2020-01-01 2020-12-31 0000005272 us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember 2020-01-01 2020-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2020-12-31 0000005272 us-gaap:AllowanceForUncollectiblePremiumsReceivableMember 2020-01-01 2020-12-31 0000005272 us-gaap:CorporateAndOtherMember 2017-12-31 0000005272 us-gaap:EquityContractMember us-gaap:NondesignatedMember 2019-12-31 0000005272 us-gaap:SecuredDebtMember us-gaap:NotesPayableOtherPayablesMember 2020-01-01 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:InterestRateContractMember 2019-12-31 0000005272 aig:AsbestosLossPortfolioTransferMember 2020-01-01 2020-12-31 0000005272 us-gaap:VentureCapitalFundsMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel3Member 2019-12-31 0000005272 aig:UsExcessCasualtyMember 2020-12-31 0000005272 aig:GeneralInsuranceMember 2020-12-31 0000005272 us-gaap:CommercialMortgageBackedSecuritiesMember aig:BondsTradingSecuritiesMember 2019-01-01 2019-12-31 0000005272 srt:ParentCompanyMember us-gaap:OtherAssetsMember 2018-12-31 0000005272 us-gaap:CorporateAndOtherMember 2020-01-01 2020-12-31 0000005272 us-gaap:AccumulatedTranslationAdjustmentMember 2019-01-01 2019-12-31 0000005272 us-gaap:RetainedEarningsMember 2020-01-01 2020-12-31 0000005272 aig:OtherMortgagesMember 2019-01-01 2019-12-31 0000005272 aig:InternationalMember 2020-01-01 2020-12-31 0000005272 aig:NorthAmericanCommercialInsuranceMember 2018-01-01 2018-12-31 0000005272 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember 2018-01-01 2018-12-31 0000005272 us-gaap:ForeignExchangeContractMember us-gaap:NondesignatedMember 2019-12-31 0000005272 aig:DeferredStockUnitsMember 2020-01-01 2020-12-31 0000005272 us-gaap:ParentMember 2020-01-01 2020-12-31 0000005272 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2019-01-01 2019-12-31 0000005272 country:US us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000005272 2020-03-30 2020-03-30 0000005272 aig:InternationalOperatingSegmentMember 2018-12-31 0000005272 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2019-01-01 2019-12-31 0000005272 aig:OtherPrivateEquityFundsMember 2020-12-31 0000005272 aig:SecuredFinancingsMember us-gaap:MaturityOvernightAndOnDemandMember 2019-12-31 0000005272 us-gaap:GuaranteedMinimumDeathBenefitMember 2018-01-01 2018-12-31 0000005272 us-gaap:CorporateAndOtherMember 2018-12-31 0000005272 us-gaap:FairValueInputsLevel2Member 2020-12-31 0000005272 aig:UsFinancialLinesMember 2020-12-31 0000005272 srt:ParentCompanyMember 2020-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2020-12-31 0000005272 aig:BondsTradingSecuritiesMember 2020-01-01 2020-12-31 0000005272 aig:LeveragedBuyoutMember 2019-12-31 0000005272 us-gaap:InterestRateContractMember 2018-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:PensionCostsMember 2020-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:ForeignExchangeContractMember 2018-01-01 2018-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member us-gaap:CashAndCashEquivalentsMember 2019-12-31 0000005272 us-gaap:OtherAssetsMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member 2020-12-31 0000005272 us-gaap:OtherContractMember 2018-12-31 0000005272 aig:CommercialOtherFinancingReceivableMember 2019-12-31 0000005272 aig:DebtIssuedOrGuaranteedMember 2020-12-31 0000005272 aig:AdverseDevelopmentReinsuranceMember aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member aig:UsWorkersCompensationMember 2020-01-01 2020-12-31 0000005272 us-gaap:ParentMember 2018-01-01 2018-12-31 0000005272 us-gaap:CreditRiskContractMember us-gaap:NondesignatedMember 2019-12-31 0000005272 us-gaap:SecuredDebtMember srt:MinimumMember us-gaap:NotesPayableOtherPayablesMember aig:AIGFPOperatingMember 2020-12-31 0000005272 us-gaap:ShortTermInvestmentsMember 2020-12-31 0000005272 us-gaap:NoncontrollingInterestMember 2020-01-01 2020-12-31 0000005272 us-gaap:AllowanceForUncollectiblePremiumsReceivableMember 2018-12-31 0000005272 aig:Syndicated4YearFacilityMember 2020-12-31 0000005272 us-gaap:InterestRateContractMember us-gaap:NondesignatedMember 2019-12-31 0000005272 aig:GeneralInsuranceMember 2018-01-01 2018-12-31 0000005272 aig:CommercialOfficesFinancingReceivableMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember 2020-12-31 0000005272 aig:OtherMortgagesMember 2020-01-01 2020-12-31 0000005272 us-gaap:HedgeFundsMember 2019-12-31 0000005272 aig:LifeAndRetirementMember 2020-12-31 0000005272 aig:PolicyholderContractDepositsMember 2020-01-01 2020-12-31 0000005272 us-gaap:SecuredDebtMember aig:GuaranteedInvestmentAgreementsMember srt:MaximumMember 2020-12-31 0000005272 aig:LongDurationInsuranceMember 2019-12-31 0000005272 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember aig:OtherVIEMember 2019-12-31 0000005272 aig:AIG2013OmnibusIncentivePlanMember 2020-01-01 2020-12-31 0000005272 aig:ForeignStateAndLocalCountryMember 2020-12-31 0000005272 us-gaap:AccumulatedTranslationAdjustmentMember 2018-01-01 2018-12-31 0000005272 aig:NorthAmericaOperatingSegmentMember 2018-12-31 0000005272 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember aig:RealEstateAndInvestmentFundsMember 2020-12-31 0000005272 2018-09-28 2018-09-28 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:CorporateDebtSecuritiesMember us-gaap:MaturityOvernightAndOnDemandMember 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member aig:USEquitySecuritiesMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel2Member aig:AlternativeFundsMember 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:ForeignExchangeContractMember 2020-12-31 0000005272 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember aig:RealEstateAndInvestmentFundsMember 2019-12-31 0000005272 us-gaap:OtherContractMember 2019-12-31 0000005272 us-gaap:EquityContractMember 2019-01-01 2019-12-31 0000005272 aig:PurchasedCreditImpairedSecuritiesMember 2020-12-31 0000005272 aig:GeneralInsuranceMember 2020-12-31 0000005272 us-gaap:AdditionalPaidInCapitalMember 2018-01-01 2018-12-31 0000005272 us-gaap:USTreasuryAndGovernmentMember 2020-12-31 0000005272 aig:ForeignStateAndLocalCountryMember 2019-12-31 0000005272 2020-06-29 2020-06-29 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember 2019-12-31 0000005272 aig:LifeInsuranceCompaniesMember 2019-01-01 2019-12-31 0000005272 aig:BondsTradingSecuritiesMember 2019-01-01 2019-12-31 0000005272 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember 2020-12-31 0000005272 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2019-01-01 2019-12-31 0000005272 us-gaap:ValuationAllowanceOfDeferredTaxAssetsMember 2020-01-01 2020-12-31 0000005272 us-gaap:EquityContractMember 2020-01-01 2020-12-31 0000005272 us-gaap:IntersegmentEliminationMember 2020-01-01 2020-12-31 0000005272 aig:CommercialOtherFinancingReceivableMember 2020-12-31 0000005272 aig:GeneralInsuranceMember 2019-12-31 0000005272 aig:FairValueAssetsImpairmentChargesMeasuredOnNonrecurringBasisDomain 2018-01-01 2018-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member us-gaap:PrivateEquityFundsMember 2020-01-01 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:USAndForeignHighYieldDebtSecuritiesMember 2020-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:OtherContractMember 2019-12-31 0000005272 aig:CommercialApartmentsFinancingReceivableMember 2019-12-31 0000005272 us-gaap:DomesticCountryMember 2020-12-31 0000005272 aig:CommercialMortgageMember 2020-01-01 2020-12-31 0000005272 aig:PolicyholderContractDepositsMember 2019-12-31 0000005272 us-gaap:SecuredDebtMember aig:GuaranteedInvestmentAgreementsMember 2020-01-01 2020-12-31 0000005272 aig:NetRealizedCapitalGainsLossesMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:FairValueHedgingMember us-gaap:ForeignExchangeContractMember 2020-01-01 2020-12-31 0000005272 us-gaap:OtherContractMember 2019-01-01 2019-12-31 0000005272 srt:MinimumMember aig:IndexLifeMember us-gaap:MeasurementInputMortalityRateMember 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember 2020-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:EquitySecuritiesMember 2020-12-31 0000005272 us-gaap:CorporateDebtSecuritiesMember us-gaap:FixedMaturitiesMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember 2018-01-01 2018-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2020-01-01 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member aig:ForeignEquitySecuritiesMember 2020-12-31 0000005272 srt:ParentCompanyMember 2020-01-01 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:USTreasuryAndGovernmentMember 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel12And3Member us-gaap:CashAndCashEquivalentsMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel12And3Member aig:USAndForeignHighYieldDebtSecuritiesMember 2020-12-31 0000005272 srt:ParentCompanyMember aig:AIGFPOperatingMember 2019-12-31 0000005272 aig:AdverseDevelopmentReinsuranceMember aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member aig:UsFinancialLinesMember 2020-01-01 2020-12-31 0000005272 us-gaap:AssetBackedSecuritiesMember 2020-12-31 0000005272 aig:RealEstateAndInfrastructurePrivateEquityFundsMember 2020-12-31 0000005272 aig:GeneralInsuranceMember aig:NorthAmericaOperatingSegmentMember 2020-01-01 2020-12-31 0000005272 aig:PurchasedCreditImpairedSecuritiesMember us-gaap:AvailableforsaleSecuritiesMember 2019-01-01 2019-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:InvestmentIncomeMember 2020-01-01 2020-12-31 0000005272 us-gaap:UnsecuredDebtMember aig:LoansAndMortgagesPayableMember 2020-12-31 0000005272 us-gaap:HedgeFundsEventDrivenMember 2019-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:EquityContractMember 2018-01-01 2018-12-31 0000005272 aig:InternationalOperatingSegmentMember 2017-12-31 0000005272 us-gaap:FairValueMeasurementsNonrecurringMember aig:OtherAssetsMiscellaneousMember 2020-01-01 2020-12-31 0000005272 srt:NorthAmericaMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember 2020-01-01 2020-12-31 0000005272 aig:CommercialRetailFinancingReceivableMember 2019-12-31 0000005272 us-gaap:SecuredDebtMember aig:GuaranteedInvestmentAgreementsMember 2020-12-31 0000005272 aig:OtherPrivateEquityFundsMember 2019-12-31 0000005272 us-gaap:NoncontrollingInterestMember 2019-01-01 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:CorporateDebtSecuritiesMember aig:Maturity365DaysorGreaterMember 2019-12-31 0000005272 aig:HedgeFundsMacroValueMember 2019-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:InterestRateContractMember 2018-01-01 2018-12-31 0000005272 us-gaap:NoncontrollingInterestMember 2018-12-31 0000005272 us-gaap:UnsecuredDebtMember aig:LoansAndMortgagesPayableMember 2019-12-31 0000005272 us-gaap:PerformanceSharesMember aig:LongTermIncentivePlanYearFiveMember 2020-01-01 2020-12-31 0000005272 aig:NorthAmericanCommercialInsuranceMember 2020-12-31 0000005272 aig:NorthAmericanCommercialInsuranceMember 2020-01-01 2020-12-31 0000005272 us-gaap:ValuationAllowanceOfDeferredTaxAssetsMember 2018-01-01 2018-12-31 0000005272 aig:NewLetterOfCreditMember 2014-02-07 0000005272 us-gaap:AllowanceForReinsuranceRecoverableMember 2018-12-31 0000005272 us-gaap:InterestRateContractMember us-gaap:NondesignatedMember 2020-12-31 0000005272 aig:OtherInvestedAssetsMember aig:NetRealizedCapitalGainsLossesMember 2019-01-01 2019-12-31 0000005272 aig:UsWorkersCompensationMember aig:ShortdurationInsuranceContractsAccidentYearsPriorToCurrentYearMember 2020-12-31 0000005272 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember 2020-01-01 2020-12-31 0000005272 us-gaap:CorporateAndOtherMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2020-12-31 0000005272 aig:GeneralInsuranceMember aig:ForeignMember 2020-12-31 0000005272 aig:UsExcessCasualtyMember aig:IncurredImpactOfAdverseDevelopmentCoverMember 2020-12-31 0000005272 us-gaap:InvestmentIncomeMember aig:PolicyholderContractDepositsMember 2020-01-01 2020-12-31 0000005272 aig:FixedAnnuitiesMember 2020-12-31 0000005272 us-gaap:AccumulatedOtherThanTemporaryImpairmentMember 2019-01-01 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member 2020-01-01 2020-12-31 0000005272 us-gaap:NotesPayableOtherPayablesMember us-gaap:UnsecuredDebtMember srt:MaximumMember 2020-12-31 0000005272 us-gaap:NondesignatedMember 2018-01-01 2018-12-31 0000005272 us-gaap:PensionCostsMember aig:AigJapanPensionPlansMember 2019-01-01 2019-12-31 0000005272 us-gaap:ValuationAllowanceOfDeferredTaxAssetsMember 2019-01-01 2019-12-31 0000005272 us-gaap:PerformanceSharesMember 2020-01-01 2020-12-31 0000005272 us-gaap:ParentMember 2019-01-01 2019-12-31 0000005272 us-gaap:AllowanceForReinsuranceRecoverableMember 2020-01-01 2020-12-31 0000005272 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2018-01-01 2018-12-31 0000005272 us-gaap:CreditRiskContractMember 2020-12-31 0000005272 2019-12-26 2019-12-26 0000005272 us-gaap:OtherInsuranceProductLineMember 2020-01-01 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember 2019-01-01 2019-12-31 0000005272 aig:LifeAndRetirementMember 2018-01-01 2018-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortDurationInsuranceContractAccidentYear2020Member 2020-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:PensionCostsMember 2019-01-01 2019-12-31 0000005272 us-gaap:CommonStockMember 2020-01-01 2020-12-31 0000005272 us-gaap:AdditionalPaidInCapitalMember 2017-12-31 0000005272 aig:UsPropertyAndSpecialRisksMember 2020-12-31 0000005272 us-gaap:AccumulatedTranslationAdjustmentMember 2020-01-01 2020-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember 2020-01-01 2020-12-31 0000005272 aig:BondsTradingSecuritiesMember 2020-12-31 0000005272 aig:OtherMortgagesMember 2019-12-31 0000005272 us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:InterestRateContractMember 2019-12-31 0000005272 aig:AffordableHousingPartnershipMember us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember 2019-12-31 0000005272 us-gaap:EmbeddedDerivativeFinancialInstrumentsMember 2019-12-31 0000005272 us-gaap:AdditionalPaidInCapitalMember 2020-12-31 0000005272 aig:InternationalOperatingSegmentMember 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member 2019-01-01 2019-12-31 0000005272 srt:MaximumMember aig:DebtNotGuaranteedMember aig:DebtOfConsolidatedInvestmentsMember 2020-12-31 0000005272 aig:NorthAmericaOperatingSegmentMember 2018-01-01 2018-12-31 0000005272 aig:PolicyholderContractDepositsMember 2019-01-01 2019-12-31 0000005272 aig:LiabilitiesMember 2019-01-01 2019-12-31 0000005272 us-gaap:RetainedEarningsMember 2018-01-01 2018-12-31 0000005272 aig:InternationalOperatingSegmentMember 2020-01-01 2020-12-31 0000005272 aig:GeneralInsuranceMember 2018-01-01 2018-12-31 0000005272 aig:CommercialHotelFinancingReceivableMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel1Member 2019-12-31 0000005272 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2017-12-31 0000005272 aig:CommercialRetailFinancingReceivableMember 2020-12-31 0000005272 us-gaap:ValuationAllowanceOfDeferredTaxAssetsMember 2017-12-31 0000005272 aig:InternationalOperatingSegmentMember 2018-01-01 2018-12-31 0000005272 us-gaap:ForeignExchangeContractMember 2020-12-31 0000005272 aig:NetOfImpactOfAdverseDevelopmentReinsuranceCoverMember aig:UsFinancialLinesMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member aig:USInvestmentGradeMember 2020-01-01 2020-12-31 0000005272 us-gaap:FixedMaturitiesMember 2019-01-01 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember aig:Maturity31To90DaysMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:MaturityOvernightAndOnDemandMember 2020-12-31 0000005272 us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:InterestRateContractMember 2020-12-31 0000005272 us-gaap:NotesPayableOtherPayablesMember us-gaap:UnsecuredDebtMember 2019-12-31 0000005272 us-gaap:ForeignExchangeContractMember us-gaap:NondesignatedMember 2020-12-31 0000005272 aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember us-gaap:FixedMaturitiesMember 2019-12-31 0000005272 us-gaap:AdditionalPaidInCapitalMember 2019-01-01 2019-12-31 0000005272 us-gaap:HedgeFundsEquityLongShortMember 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember aig:Maturity31To90DaysMember us-gaap:CorporateDebtSecuritiesMember 2020-12-31 0000005272 us-gaap:BanksTrustAndInsuranceEquitiesMember 2020-12-31 0000005272 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember 2018-01-01 2018-12-31 0000005272 us-gaap:CommercialMortgageBackedSecuritiesMember aig:BondsTradingSecuritiesMember 2019-12-31 0000005272 aig:GroupRetirementSegmentMember 2019-12-31 0000005272 aig:AllowanceForMortgageAndOtherLoansReceivableMember 2018-01-01 2018-12-31 0000005272 us-gaap:AllowanceForReinsuranceRecoverableMember 2018-01-01 2018-12-31 0000005272 aig:ValidusHoldingsLtdMember aig:NorthAmericaOperatingSegmentMember 2018-07-18 0000005272 us-gaap:UnsecuredDebtMember 2020-12-31 0000005272 aig:AllowanceForMortgageAndOtherLoansReceivableMember 2019-01-01 2019-12-31 0000005272 aig:PolicyholderContractDepositsMember 2018-12-31 0000005272 us-gaap:PrivateEquityFundsMember 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member us-gaap:PrivateEquityFundsMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel3Member aig:DiscountedCashflowValuationTechniqueMember us-gaap:CorporateDebtSecuritiesMember 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:CorporateDebtSecuritiesMember 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2019-01-01 2019-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2020-01-01 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member us-gaap:CashAndCashEquivalentsMember 2020-12-31 0000005272 aig:InsuranceContractsMember us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel12And3Member 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:USStatesAndPoliticalSubdivisionsMember 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:USStatesAndPoliticalSubdivisionsMember 2019-01-01 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2019-01-01 2019-12-31 0000005272 srt:MaximumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputEquityInterestRateCorrelationMember 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:AigJapanPensionPlansMember 2019-01-01 2019-12-31 0000005272 us-gaap:NoncontrollingInterestMember 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:CorporateDebtSecuritiesMember 2018-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:AssetBackedSecuritiesMember us-gaap:FairValueInputsLevel2Member 2019-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember srt:MinimumMember us-gaap:MeasurementInputLossSeverityMember 2019-12-31 0000005272 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember 2019-01-01 2019-12-31 0000005272 aig:UsWorkersCompensationMember 2020-12-31 0000005272 aig:GeneralInsuranceMember 2020-01-01 2020-12-31 0000005272 aig:SecuredFinancingsMember us-gaap:FixedMaturitiesMember 2020-12-31 0000005272 aig:UsPropertyAndSpecialRisksMember aig:IncurredImpactOfAdverseDevelopmentCoverMember 2020-12-31 0000005272 aig:LongDurationInsuranceMember 2020-01-01 2020-12-31 0000005272 us-gaap:TreasuryStockMember 2020-01-01 2020-12-31 0000005272 us-gaap:NotesPayableOtherPayablesMember us-gaap:UnsecuredDebtMember 2020-12-31 0000005272 us-gaap:UnsecuredDebtMember us-gaap:JuniorSubordinatedDebtMember 2020-01-01 2020-12-31 0000005272 us-gaap:InterestRateContractMember 2020-12-31 0000005272 us-gaap:FixedMaturitiesMember 2018-12-31 0000005272 us-gaap:CreditRiskContractMember 2019-12-31 0000005272 aig:LifeAndRetirementMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember 2018-01-01 2018-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-01-01 2018-12-31 0000005272 aig:NetRealizedCapitalGainsLossesMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:FairValueHedgingMember us-gaap:ForeignExchangeContractMember 2019-01-01 2019-12-31 0000005272 aig:BondsTradingSecuritiesMember 2018-12-31 0000005272 us-gaap:OtherAssetsMember 2020-01-01 2020-12-31 0000005272 aig:NorthAmericaOperatingSegmentMember 2020-01-01 2020-12-31 0000005272 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember aig:AffordableHousingPartnershipMember 2020-12-31 0000005272 aig:LifeInsuranceCompaniesMember 2016-07-01 0000005272 us-gaap:ParentMember 2017-12-31 0000005272 aig:UsPersonalInsuranceMember aig:IncurredImpactOfAdverseDevelopmentCoverMember 2020-12-31 0000005272 aig:CreditRiskRelatedContingentFeaturesMember 2019-12-31 0000005272 aig:HedgeFundsMacroValueMember 2020-12-31 0000005272 us-gaap:InvestmentIncomeMember aig:BondsTradingSecuritiesMember 2019-01-01 2019-12-31 0000005272 aig:BondsTradingSecuritiesMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2018-12-31 0000005272 us-gaap:PrivateEquityFundsMember 2019-12-31 0000005272 2019-09-30 2019-09-30 0000005272 us-gaap:FairValueInputsLevel2Member 2019-12-31 0000005272 us-gaap:IntersegmentEliminationMember 2018-01-01 2018-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FixedMaturitiesMember 2019-12-31 0000005272 us-gaap:ValuationAllowanceOfDeferredTaxAssetsMember 2019-12-31 0000005272 us-gaap:CommonStockMember 2019-12-31 0000005272 aig:LongDurationInsuranceMember 2019-01-01 2019-12-31 0000005272 srt:NorthAmericaMember 2020-01-01 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:ForeignGovernmentDebtSecuritiesMember us-gaap:MaturityOvernightAndOnDemandMember 2020-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:InvestmentIncomeMember 2018-01-01 2018-12-31 0000005272 us-gaap:HedgeFundsEquityLongShortMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member 2019-12-31 0000005272 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2020-01-01 2020-12-31 0000005272 stpr:NY 2020-12-31 0000005272 aig:LifeInsuranceCompaniesMember 2020-01-01 2020-12-31 0000005272 us-gaap:IntersegmentEliminationMember 2019-01-01 2019-12-31 0000005272 aig:LifeInsuranceCompaniesMember 2020-01-01 2020-12-31 0000005272 us-gaap:CorporateDebtSecuritiesMember us-gaap:FixedMaturitiesMember 2020-12-31 0000005272 us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember us-gaap:OtherIncomeMember 2020-01-01 2020-12-31 0000005272 aig:AffordableHousingPartnershipMember us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember 2020-12-31 0000005272 aig:FairValueAssetsImpairmentChargesMeasuredOnNonrecurringBasisDomain 2020-01-01 2020-12-31 0000005272 us-gaap:AllowanceForUncollectiblePremiumsReceivableMember 2020-12-31 0000005272 us-gaap:SecuredDebtMember aig:GuaranteedInvestmentAgreementsMember 2019-12-31 0000005272 aig:OtherInvestedAssetsMember us-gaap:InvestmentIncomeMember 2020-01-01 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:CorporateDebtSecuritiesMember aig:Maturity365DaysorGreaterMember 2020-12-31 0000005272 us-gaap:JuniorSubordinatedDebtMember us-gaap:UnsecuredDebtMember 2020-12-31 0000005272 us-gaap:AccumulatedOtherThanTemporaryImpairmentMember aig:BondsAvailableForSaleSecuritiesMember 2019-12-31 0000005272 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2018-01-01 2018-12-31 0000005272 aig:AllowanceForMortgageAndOtherLoansReceivableMember 2020-01-01 2020-12-31 0000005272 us-gaap:FairValueMeasurementsNonrecurringMember aig:OtherAssetsMiscellaneousMember 2018-01-01 2018-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000005272 aig:UsWorkersCompensationMember 2020-01-01 2020-12-31 0000005272 us-gaap:MoneyMarketFundsMember 2019-12-31 0000005272 us-gaap:InvestmentIncomeMember aig:BondsTradingSecuritiesMember 2020-01-01 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member us-gaap:PrivateEquityFundsMember 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:CommercialMortgageBackedSecuritiesMember 2020-01-01 2020-12-31 0000005272 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2020-12-31 0000005272 us-gaap:AdditionalPaidInCapitalMember 2020-01-01 2020-12-31 0000005272 us-gaap:USTreasuryAndGovernmentMember us-gaap:FixedMaturitiesMember 2019-12-31 0000005272 country:US us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-01-01 2018-12-31 0000005272 us-gaap:NoncontrollingInterestMember 2017-12-31 0000005272 aig:LifeInsuranceCompaniesMember aig:DomesticMember 2019-12-31 0000005272 us-gaap:EmployeeStockOptionMember 2020-01-01 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member 2020-12-31 0000005272 us-gaap:NoncontrollingInterestMember 2018-01-01 2018-12-31 0000005272 us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember us-gaap:OtherIncomeMember 2019-01-01 2019-12-31 0000005272 us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember aig:NetRealizedCapitalGainsLossesMember 2020-01-01 2020-12-31 0000005272 aig:LongDurationInsuranceMember 2020-12-31 0000005272 aig:InsuranceContractsMember us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member 2020-01-01 2020-12-31 0000005272 srt:ParentCompanyMember 2019-01-01 2019-12-31 0000005272 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-12-31 0000005272 aig:CommercialMortgageMember 2018-01-01 2018-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:ForeignGovernmentDebtSecuritiesMember us-gaap:FairValueInputsLevel2Member 2020-12-31 0000005272 aig:InsuranceContractsMember us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member 2019-01-01 2019-12-31 0000005272 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember aig:RealEstateAndInvestmentFundsMember 2020-12-31 0000005272 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember 2019-01-01 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member us-gaap:PrivateEquityFundsMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member us-gaap:PrivateEquityFundsMember 2019-01-01 2019-12-31 0000005272 us-gaap:NondesignatedMember aig:PolicyholderBenefitsAndClaimsIncurredMember 2020-01-01 2020-12-31 0000005272 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember aig:OtherVIEMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel3Member 2020-12-31 0000005272 aig:InsuranceContractsMember us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member 2018-12-31 0000005272 aig:LongDurationInsuranceMember 2018-12-31 0000005272 srt:MinimumMember us-gaap:CreditIndexProductMember us-gaap:MeasurementInputLapseRateMember 2019-12-31 0000005272 srt:ParentCompanyMember 2019-12-31 0000005272 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:OtherContractMember 2019-12-31 0000005272 srt:ParentCompanyMember 2018-01-01 2018-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember us-gaap:ShortDurationInsuranceContractAccidentYear2020Member 2020-12-31 0000005272 us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:FairValueHedgingMember aig:NetRealizedCapitalGainsLossesMember us-gaap:InterestRateContractMember 2018-01-01 2018-12-31 0000005272 aig:LifeInsuranceCompaniesMember 2018-01-01 2018-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:CorporateDebtSecuritiesMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member aig:ForeignEquitySecuritiesMember 2019-12-31 0000005272 aig:ShortDurationInsuranceMember 2018-01-01 2018-12-31 0000005272 us-gaap:ShortTermInvestmentsMember 2019-12-31 0000005272 aig:GeneralInsuranceMember aig:ForeignMember 2020-01-01 2020-12-31 0000005272 us-gaap:FixedMaturitiesMember 2018-01-01 2018-12-31 0000005272 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2018-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:USStatesAndPoliticalSubdivisionsMember aig:Maturity365DaysorGreaterMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:ForeignGovernmentDebtSecuritiesMember us-gaap:MaturityUpTo30DaysMember 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2019-01-01 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel2Member 2019-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:MeasurementInputLossSeverityMember srt:WeightedAverageMember 2019-12-31 0000005272 us-gaap:ParentMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member 2020-01-01 2020-12-31 0000005272 us-gaap:AdditionalPaidInCapitalMember 2018-12-31 0000005272 us-gaap:CreditRiskContractMember 2019-01-01 2019-12-31 0000005272 us-gaap:FixedMaturitiesMember 2017-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:CreditRiskContractMember 2019-01-01 2019-12-31 0000005272 aig:BondsTradingSecuritiesMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2019-01-01 2019-12-31 0000005272 us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember aig:NetRealizedCapitalGainsLossesMember 2019-01-01 2019-12-31 0000005272 us-gaap:IndustrialMiscellaneousAndAllOthersMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member 2019-01-01 2019-12-31 0000005272 aig:CommercialApartmentsFinancingReceivableMember 2020-12-31 0000005272 aig:UsFinancialLinesMember aig:IncurredImpactOfAdverseDevelopmentCoverMember 2020-12-31 0000005272 us-gaap:InterestRateContractMember 2020-01-01 2020-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:CorporateDebtSecuritiesMember 2020-01-01 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member us-gaap:ForeignGovernmentDebtSecuritiesMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:DefinedBenefitPlanEquitySecurityNonUsMember aig:USAndForeignHighYieldDebtSecuritiesMember 2019-12-31 0000005272 us-gaap:AccumulatedTranslationAdjustmentMember 2020-12-31 0000005272 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2019-12-31 0000005272 us-gaap:AccumulatedOtherThanTemporaryImpairmentMember 2018-01-01 2018-12-31 0000005272 srt:MinimumMember us-gaap:UnsecuredDebtMember us-gaap:JuniorSubordinatedDebtMember 2020-12-31 0000005272 aig:LifeAndRetirementMember 2020-01-01 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember 2018-12-31 0000005272 us-gaap:AdditionalPaidInCapitalMember 2019-12-31 0000005272 srt:MinimumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember us-gaap:MeasurementInputUtilizationRateMember 2020-12-31 0000005272 aig:CommercialMortgageMember 2020-12-31 0000005272 us-gaap:RetainedEarningsMember 2019-01-01 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2020-01-01 2020-12-31 0000005272 us-gaap:EmployeeStockOptionMember 2020-12-31 0000005272 us-gaap:CommonStockMember 2020-12-31 0000005272 us-gaap:ShortTermInvestmentsMember 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:AigJapanPensionPlansMember 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember 2018-01-01 2018-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member aig:USInvestmentGradeMember 2019-01-01 2019-12-31 0000005272 2020-12-28 2020-12-28 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member aig:USAndForeignHighYieldDebtSecuritiesMember 2020-12-31 0000005272 aig:OtherMortgagesMember 2017-12-31 0000005272 aig:RealEstateAndInfrastructurePrivateEquityFundsMember 2019-12-31 0000005272 aig:AllowanceForMortgageAndOtherLoansReceivableMember 2017-12-31 0000005272 aig:NorthAmericanCommercialInsuranceMember 2019-12-31 0000005272 aig:InstitutionalMarketsMember 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2020-01-01 2020-12-31 0000005272 us-gaap:PolicyLoansMember 2020-12-31 0000005272 us-gaap:FixedMaturitiesMember us-gaap:MortgageBackedSecuritiesMember 2019-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember srt:MinimumMember us-gaap:MeasurementInputConstantPrepaymentRateMember 2019-12-31 0000005272 aig:LiabilitiesMember 2018-12-31 0000005272 country:US aig:InsuranceContractsMember us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member 2019-12-31 0000005272 us-gaap:PerformanceSharesMember aig:LongTermIncentivePlanYearFiveMember 2019-12-31 0000005272 us-gaap:CommonStockMember 2017-12-31 0000005272 us-gaap:FixedMaturitiesMember us-gaap:MortgageBackedSecuritiesMember 2020-12-31 0000005272 country:US 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:USStatesAndPoliticalSubdivisionsMember 2020-01-01 2020-12-31 0000005272 aig:GrowthEquityMember 2020-12-31 0000005272 us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember us-gaap:InvestmentIncomeMember 2019-01-01 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2020-12-31 0000005272 us-gaap:AssetsMember 2020-01-01 2020-12-31 0000005272 us-gaap:AccumulatedGainLossFinancialLiabilityFairValueOptionAttributableToParentMember 2018-01-01 2018-12-31 0000005272 us-gaap:RetainedEarningsMember 2017-12-31 0000005272 srt:MaximumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputMortalityMultiplierMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2019-12-31 0000005272 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember 2018-01-01 2018-12-31 0000005272 aig:LifeInsuranceCompaniesMember 2019-12-31 0000005272 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0000005272 srt:MinimumMember aig:MeasurementInputBaseLapseRatesMember aig:IndexLifeMember 2019-12-31 0000005272 us-gaap:BondsMember 2020-12-31 0000005272 us-gaap:TreasuryStockMember 2019-01-01 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:CommercialMortgageBackedSecuritiesMember 2019-01-01 2019-12-31 0000005272 us-gaap:PolicyLoansMember 2019-12-31 0000005272 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2020-01-01 2020-12-31 0000005272 aig:InternationalMember 2018-01-01 2018-12-31 0000005272 aig:LifeInsuranceCompaniesMember aig:ForeignMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FutureMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel2Member aig:FairValueAssetsImpairmentChargesMeasuredOnNonrecurringBasisDomain 2019-12-31 0000005272 srt:MaximumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputBaseLapseRatesMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2019-12-31 0000005272 aig:LifeInsuranceCompaniesMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member us-gaap:ForeignGovernmentDebtSecuritiesMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsNonrecurringMember aig:OtherAssetsMiscellaneousMember 2019-01-01 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel2Member us-gaap:PrivateEquityFundsMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel2Member us-gaap:CashAndCashEquivalentsMember 2020-12-31 0000005272 us-gaap:UnsecuredDebtMember aig:LoansAndMortgagesPayableMember 2020-01-01 2020-12-31 0000005272 us-gaap:CommonStockMember 2019-01-01 2019-12-31 0000005272 us-gaap:EmployeeStockOptionMember 2019-01-01 2019-12-31 0000005272 us-gaap:TreasuryStockMember 2017-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:DefinedBenefitPlanEquitySecurityNonUsMember aig:ForeignEquitySecuritiesMember 2020-12-31 0000005272 us-gaap:PerformanceSharesMember aig:LongTermIncentivePlanYearThreeMember 2020-01-01 2020-12-31 0000005272 us-gaap:AssetsMember 2019-01-01 2019-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FixedMaturitiesMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel12And3Member us-gaap:PrivateEquityFundsMember 2020-12-31 0000005272 us-gaap:SecuredDebtMember us-gaap:NotesPayableOtherPayablesMember aig:AIGFPOperatingMember srt:MaximumMember 2020-12-31 0000005272 srt:ConsolidationEliminationsMember aig:DiscountOnWorkersCompensationLinesMember 2020-12-31 0000005272 aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember us-gaap:FixedMaturitiesMember 2020-12-31 0000005272 us-gaap:GuaranteedMinimumDeathBenefitMember 2020-01-01 2020-12-31 0000005272 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2020-12-31 0000005272 aig:CommercialMortgageMember 2020-01-01 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:USTreasuryAndGovernmentMember us-gaap:AccumulatedOtherThanTemporaryImpairmentMember 2019-12-31 0000005272 2019-03-29 2019-03-29 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member us-gaap:USTreasuryAndGovernmentMember 2020-12-31 0000005272 aig:GeneralInsuranceMember aig:InternationalOperatingSegmentMember 2020-01-01 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel2Member 2020-12-31 0000005272 us-gaap:InvestmentIncomeMember aig:PolicyholderContractDepositsMember 2019-01-01 2019-12-31 0000005272 aig:UsExcessCasualtyMember aig:ShortdurationInsuranceContractsAccidentYearsPriorToCurrentYearMember 2020-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortDurationInsuranceContractAccidentYear2020Member 2020-12-31 0000005272 aig:NorthAmericaOperatingSegmentMember 2020-12-31 0000005272 us-gaap:CommonStockMember 2018-01-01 2018-12-31 0000005272 srt:ParentCompanyMember us-gaap:OtherAssetsMember 2019-12-31 0000005272 us-gaap:PerformanceSharesMember aig:LongTermIncentivePlanYearFourMember 2020-01-01 2020-12-31 0000005272 us-gaap:SecuredDebtMember 2019-12-31 0000005272 aig:UsExcessCasualtyMember aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember 2017-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:ForeignExchangeContractMember 2019-01-01 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000005272 us-gaap:PensionCostsMember aig:AigJapanPensionPlansMember 2020-12-31 0000005272 2018-06-28 2018-06-28 0000005272 aig:CommercialMortgageMember 2019-12-31 0000005272 aig:DebtNotGuaranteedMember aig:OtherNotesBondsLoansAndMortgagesPayableMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:DefinedBenefitPlanEquitySecurityNonUsMember aig:USAndForeignHighYieldDebtSecuritiesMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel3Member aig:IndexLifeMember aig:DiscountedCashflowValuationTechniqueMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:AssetBackedSecuritiesMember us-gaap:FairValueInputsLevel12And3Member 2020-12-31 0000005272 us-gaap:SecuredDebtMember us-gaap:NotesPayableOtherPayablesMember srt:MaximumMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member us-gaap:CashAndCashEquivalentsMember 2019-12-31 0000005272 us-gaap:NondesignatedMember aig:PolicyFeesMember 2018-01-01 2018-12-31 0000005272 aig:OtherInvestedAssetsMember 2019-12-31 0000005272 us-gaap:RetainedEarningsMember 2018-12-31 0000005272 us-gaap:GuaranteedMinimumDeathBenefitMember aig:HighestContractValueAttainedContractMember 2019-01-01 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member 2018-01-01 2018-12-31 0000005272 aig:UsPersonalInsuranceMember aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member 2018-01-01 2018-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member us-gaap:FutureMember 2020-12-31 0000005272 aig:AIG2013OmnibusIncentivePlanMember 2020-12-31 0000005272 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember 2018-01-01 2018-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:ForeignExchangeContractMember 2020-01-01 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember 2018-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel2Member us-gaap:ForeignGovernmentDebtSecuritiesMember 2020-12-31 0000005272 us-gaap:AccumulatedGainLossFinancialLiabilityFairValueOptionAttributableToParentMember 2019-01-01 2019-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2020-12-31 0000005272 aig:NorthAmericaOperatingSegmentMember 2019-12-31 0000005272 us-gaap:AccumulatedTranslationAdjustmentMember 2017-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel2Member 2019-12-31 0000005272 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2020-12-31 0000005272 aig:UsExcessCasualtyMember 2020-01-01 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:USEquitySecuritiesMember 2019-12-31 0000005272 srt:MaximumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember us-gaap:MeasurementInputUtilizationRateMember 2019-12-31 0000005272 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FixedMaturitiesMember 2020-12-31 0000005272 aig:NorthAmericanCommercialInsuranceMember 2019-01-01 2019-12-31 0000005272 aig:OtherAssetsMiscellaneousMember 2020-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0000005272 us-gaap:USStatesAndPoliticalSubdivisionsMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel3Member aig:DiscountedCashflowValuationTechniqueMember us-gaap:USStatesAndPoliticalSubdivisionsMember 2020-12-31 0000005272 aig:InternationalMember 2019-01-01 2019-12-31 0000005272 country:US us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000005272 srt:MaximumMember aig:MeasurementInputYieldMember us-gaap:CommercialMortgageBackedSecuritiesMember 2020-12-31 0000005272 srt:MaximumMember aig:MeasurementInputYieldMember aig:CertainCollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member us-gaap:PrivateEquityFundsMember 2019-12-31 0000005272 country:US us-gaap:OtherInvestmentsMember 2020-12-31 0000005272 aig:FairValueAssetsImpairmentChargesMeasuredOnNonrecurringBasisDomain 2019-12-31 0000005272 aig:UsPersonalInsuranceMember 2020-01-01 2020-12-31 0000005272 aig:UsFinancialLinesMember 2020-01-01 2020-12-31 0000005272 us-gaap:ParentMember 2018-12-31 0000005272 srt:MaximumMember us-gaap:CorporateDebtSecuritiesMember aig:MeasurementInputYieldMember 2019-12-31 0000005272 aig:BondsTradingSecuritiesMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2019-12-31 0000005272 aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member aig:UsFinancialLinesMember 2019-01-01 2019-12-31 0000005272 srt:WeightedAverageMember aig:MeasurementInputYieldMember aig:CertainCollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:ForeignGovernmentDebtSecuritiesMember aig:Maturity91To364DaysMember 2019-12-31 0000005272 us-gaap:CommercialMortgageBackedSecuritiesMember aig:BondsTradingSecuritiesMember 2020-01-01 2020-12-31 0000005272 aig:LeveragedBuyoutMember 2020-12-31 0000005272 us-gaap:UnsecuredDebtMember srt:MaximumMember us-gaap:JuniorSubordinatedDebtMember 2020-12-31 0000005272 aig:Syndicated4YearFacilityMember 2020-01-01 2020-12-31 0000005272 aig:LifeInsuranceCompaniesMember aig:ForeignMember 2020-12-31 0000005272 srt:MinimumMember us-gaap:CorporateDebtSecuritiesMember aig:MeasurementInputYieldMember 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:CorporateDebtSecuritiesMember us-gaap:AccumulatedOtherThanTemporaryImpairmentMember 2019-12-31 0000005272 us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:ForeignExchangeContractMember 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:MortgageBackedSecuritiesMember 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2020-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember srt:MinimumMember aig:MeasurementInputConstantDefaultRateMember 2020-12-31 0000005272 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0000005272 us-gaap:OtherAssetsMember 2020-12-31 0000005272 aig:OtherInvestmentMember 2019-01-01 2019-12-31 0000005272 us-gaap:NotesPayableOtherPayablesMember us-gaap:SecuredDebtMember 2019-12-31 0000005272 aig:InternationalOperatingSegmentMember 2019-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:OtherContractMember 2020-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:InterestRateContractMember 2019-01-01 2019-12-31 0000005272 country:US us-gaap:PensionCostsMember 2018-01-01 2018-12-31 0000005272 us-gaap:UnsecuredDebtMember us-gaap:JuniorSubordinatedDebtMember aig:AIGLifeHoldingsUSIncMember 2020-01-01 2020-12-31 0000005272 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember 2020-01-01 2020-12-31 0000005272 2020-09-30 2020-09-30 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member us-gaap:AssetBackedSecuritiesMember 2020-12-31 0000005272 us-gaap:CommonStockMember 2020-12-31 0000005272 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-12-31 0000005272 us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember us-gaap:InvestmentIncomeMember 2020-01-01 2020-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:OtherContractMember 2020-01-01 2020-12-31 0000005272 us-gaap:SecuredDebtMember us-gaap:NotesPayableOtherPayablesMember aig:AIGFPOperatingMember 2020-01-01 2020-12-31 0000005272 us-gaap:VentureCapitalFundsMember 2019-12-31 0000005272 aig:BondsTradingSecuritiesMember aig:NetRealizedCapitalGainsLossesMember 2019-01-01 2019-12-31 0000005272 aig:LifeInsuranceCompaniesMember aig:ForeignMember 2019-01-01 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel2Member 2020-12-31 0000005272 srt:MinimumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputEquityInterestRateCorrelationMember 2020-12-31 0000005272 aig:NetRealizedCapitalGainsLossesMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:FairValueHedgingMember us-gaap:InterestRateContractMember 2019-01-01 2019-12-31 0000005272 us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:ForeignExchangeContractMember us-gaap:FairValueHedgingMember aig:NetRealizedCapitalGainsLossesMember 2018-01-01 2018-12-31 0000005272 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-01-01 2019-12-31 0000005272 aig:OtherInvestedAssetsMember us-gaap:InvestmentIncomeMember 2019-01-01 2019-12-31 0000005272 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2017-12-31 0000005272 aig:UsPersonalInsuranceMember aig:ShortdurationInsuranceContractsAccidentYearsPriorToCurrentYearMember 2020-12-31 0000005272 us-gaap:NondesignatedMember aig:PolicyFeesMember 2019-01-01 2019-12-31 0000005272 aig:DomesticMember aig:GeneralInsuranceMember 2020-12-31 0000005272 aig:OtherInvestedAssetsMember us-gaap:OtherIncomeMember 2019-01-01 2019-12-31 0000005272 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2019-12-31 0000005272 srt:MinimumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputEquityVolatilityMember 2020-12-31 0000005272 us-gaap:UnsecuredDebtMember srt:MaximumMember aig:LoansAndMortgagesPayableMember 2020-12-31 0000005272 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FixedMaturitiesMember 2019-12-31 0000005272 srt:MinimumMember us-gaap:EmployeeStockOptionMember 2020-01-01 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2019-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember srt:MinimumMember us-gaap:MeasurementInputLossSeverityMember 2020-12-31 0000005272 us-gaap:OtherIncomeMember aig:BondsAvailableForSaleSecuritiesMember 2019-01-01 2019-12-31 0000005272 srt:MaximumMember aig:IndexLifeMember us-gaap:MeasurementInputMortalityRateMember 2019-12-31 0000005272 aig:LiabilitiesMember 2019-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember srt:WeightedAverageMember us-gaap:MeasurementInputConstantPrepaymentRateMember 2020-12-31 0000005272 aig:ShortDurationInsuranceMember aig:NICOMember 2017-01-01 2017-03-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquityContractMember 2020-12-31 0000005272 srt:ParentCompanyMember 2018-12-31 0000005272 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2020-12-31 0000005272 stpr:NY 2020-01-01 2020-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2019-12-31 0000005272 us-gaap:NotesPayableOtherPayablesMember us-gaap:UnsecuredDebtMember aig:AIGLifeHoldingsUSIncMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member us-gaap:USTreasuryAndGovernmentMember 2019-12-31 0000005272 country:US us-gaap:FixedMaturitiesMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel3Member aig:DiscountedCashflowValuationTechniqueMember us-gaap:CreditIndexProductMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member aig:USEquitySecuritiesMember 2020-12-31 0000005272 us-gaap:ForeignGovernmentDebtMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:CreditRiskContractMember 2019-12-31 0000005272 srt:MinimumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputMortalityMultiplierMember 2019-12-31 0000005272 us-gaap:FairValueInputsLevel3Member aig:FairValueAssetsImpairmentChargesMeasuredOnNonrecurringBasisDomain 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel2Member us-gaap:FutureMember 2020-12-31 0000005272 srt:MaximumMember aig:IndexLifeMember us-gaap:MeasurementInputMortalityRateMember 2020-12-31 0000005272 country:US us-gaap:OtherInvestmentsMember 2019-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:EquityContractMember 2020-01-01 2020-12-31 0000005272 us-gaap:AllowanceForReinsuranceRecoverableMember 2019-01-01 2019-12-31 0000005272 srt:MinimumMember us-gaap:CorporateDebtSecuritiesMember aig:MeasurementInputYieldMember 2019-12-31 0000005272 aig:PurchasedCreditImpairedSecuritiesMember us-gaap:AvailableforsaleSecuritiesMember 2018-12-31 0000005272 srt:MaximumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputEquityVolatilityMember 2020-12-31 0000005272 aig:RealEstateAndInvestmentFundsMember 2019-12-31 0000005272 srt:MinimumMember aig:MeasurementInputYieldMember aig:CertainCollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:OtherContractMember 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member us-gaap:OtherContractMember 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:EquityContractMember 2020-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:OtherContractMember 2018-01-01 2018-12-31 0000005272 us-gaap:HedgeFundsMember 2020-12-31 0000005272 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-01-01 2018-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:ForeignEquitySecuritiesMember 2019-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2019-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember srt:MaximumMember us-gaap:MeasurementInputConstantPrepaymentRateMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember us-gaap:FairValueInputsLevel3Member 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:InterestRateContractMember 2020-12-31 0000005272 aig:InsuranceContractsMember us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel2Member 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:InterestRateContractMember 2020-12-31 0000005272 srt:MinimumMember us-gaap:CreditIndexProductMember aig:MeasurementInputOptionsBudgetMember 2020-12-31 0000005272 srt:MinimumMember aig:MeasurementInputYieldMember us-gaap:CommercialMortgageBackedSecuritiesMember 2019-12-31 0000005272 aig:BondsTradingSecuritiesMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2018-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:ForeignGovernmentDebtSecuritiesMember aig:Maturity365DaysorGreaterMember 2019-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:PensionCostsMember 2019-12-31 0000005272 country:US aig:InsuranceContractsMember us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member 2020-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2020-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CreditRiskContractMember 2019-12-31 0000005272 srt:MinimumMember aig:MeasurementInputYieldMember us-gaap:CommercialMortgageBackedSecuritiesMember 2020-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:PensionCostsMember 2020-01-01 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel2Member us-gaap:ForeignGovernmentDebtSecuritiesMember 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel12And3Member 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member us-gaap:CreditRiskContractMember 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:CorporateDebtSecuritiesMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:CreditRiskContractMember 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:CommercialMortgageBackedSecuritiesMember 2019-12-31 0000005272 aig:SecuredFinancingsMember us-gaap:MaturityUpTo30DaysMember 2019-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueInputsLevel3Member aig:DiscountedCashflowValuationTechniqueMember 2019-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:ForeignExchangeContractMember 2019-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember aig:ShortdurationInsuranceContractsAccidentYearsPriorToCurrentYearMember 2020-12-31 0000005272 country:US us-gaap:EquitySecuritiesMember 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:USTreasuryAndGovernmentMember 2019-12-31 0000005272 aig:InternationalMember 2020-12-31 0000005272 us-gaap:UnsecuredDebtMember us-gaap:JuniorSubordinatedDebtMember aig:AIGLifeHoldingsUSIncMember 2020-12-31 0000005272 aig:BondsTradingSecuritiesMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2020-01-01 2020-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2020-12-31 0000005272 2018-03-29 2018-03-29 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel2Member us-gaap:FutureMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member us-gaap:FutureMember 2020-12-31 0000005272 aig:LifeInsuranceCompaniesMember us-gaap:DistributionRightsMember 2020-01-01 2020-12-31 0000005272 country:US aig:InsuranceContractsMember us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2017-12-31 0000005272 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2013-12-31 0000005272 us-gaap:AllowanceForReinsuranceRecoverableMember 2019-12-31 0000005272 aig:AlternativeFundsMember us-gaap:FairValueMeasurementsNonrecurringMember 2020-01-01 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member us-gaap:AssetBackedSecuritiesMember 2019-12-31 0000005272 aig:LifeInsuranceCompaniesMember us-gaap:DistributionRightsMember 2019-12-31 0000005272 srt:MinimumMember aig:DebtNotGuaranteedMember aig:DebtOfConsolidatedInvestmentsMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CreditRiskContractMember 2020-12-31 0000005272 aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member aig:UsWorkersCompensationMember 2019-01-01 2019-12-31 0000005272 srt:MaximumMember us-gaap:CreditIndexProductMember aig:MeasurementInputMortalityMultiplierMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel2Member aig:OtherAssetsMiscellaneousMember 2020-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2020-12-31 0000005272 country:US aig:InsuranceContractsMember us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel12And3Member 2019-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member 2018-01-01 2018-12-31 0000005272 us-gaap:OtherIncomeMember aig:PolicyholderContractDepositsMember 2019-01-01 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:MortgageBackedSecuritiesMember 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member 2018-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member us-gaap:CashAndCashEquivalentsMember 2020-12-31 0000005272 aig:SecuredFinancingsMember aig:Maturity365DaysorGreaterMember 2020-12-31 0000005272 us-gaap:PerformanceSharesMember aig:LongTermIncentivePlanYearThreeMember 2020-12-31 0000005272 srt:ParentCompanyMember us-gaap:JuniorSubordinatedDebtMember 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:USTreasuryAndGovernmentMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel2Member aig:ForeignEquitySecuritiesMember 2020-12-31 0000005272 aig:AlternativeFundsMember us-gaap:FairValueMeasurementsNonrecurringMember 2018-01-01 2018-12-31 0000005272 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2018-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member 2019-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member 2020-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2014-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member 2018-12-31 0000005272 aig:AdverseDevelopmentReinsuranceMember aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2017-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member 2020-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2017-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member 2013-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2019-12-31 0000005272 us-gaap:AllowanceForReinsuranceRecoverableMember 2020-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember srt:MaximumMember us-gaap:MeasurementInputLossSeverityMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member 2020-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FixedMaturitiesMember 2020-12-31 0000005272 us-gaap:PreferredStockIncludingAdditionalPaidInCapitalMember 2020-01-01 2020-12-31 0000005272 aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member aig:UsFinancialLinesMember 2018-01-01 2018-12-31 0000005272 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2020-01-01 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member 2020-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member 2018-12-31 0000005272 aig:AdverseDevelopmentReinsuranceMember aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2020-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2016-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2013-12-31 0000005272 srt:MinimumMember us-gaap:USStatesAndPoliticalSubdivisionsMember aig:MeasurementInputYieldMember 2019-12-31 0000005272 us-gaap:NotesPayableOtherPayablesMember us-gaap:UnsecuredDebtMember srt:MaximumMember aig:AIGLifeHoldingsUSIncMember 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel12And3Member us-gaap:ForeignGovernmentDebtSecuritiesMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member us-gaap:ForeignExchangeContractMember 2020-12-31 0000005272 aig:UsPropertyAndSpecialRisksMember aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member 2020-01-01 2020-12-31 0000005272 us-gaap:NotesPayableOtherPayablesMember us-gaap:UnsecuredDebtMember aig:AIGLifeHoldingsUSIncMember 2020-01-01 2020-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USTreasuryAndGovernmentMember 2020-12-31 0000005272 aig:BondsTradingSecuritiesMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel2Member aig:ForeignEquitySecuritiesMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel12And3Member us-gaap:FutureMember 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:CorporateDebtSecuritiesMember aig:Maturity91To364DaysMember 2020-12-31 0000005272 us-gaap:CommercialMortgageBackedSecuritiesMember aig:BondsTradingSecuritiesMember 2018-12-31 0000005272 us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember 2018-12-31 0000005272 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:AccumulatedOtherThanTemporaryImpairmentMember us-gaap:MortgageBackedSecuritiesMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel12And3Member 2020-12-31 0000005272 us-gaap:FairValueInputsLevel3Member aig:DiscountedCashflowValuationTechniqueMember us-gaap:CommercialMortgageBackedSecuritiesMember 2019-12-31 0000005272 srt:MaximumMember us-gaap:CreditIndexProductMember aig:MeasurementInputOptionsBudgetMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member us-gaap:AssetBackedSecuritiesMember 2020-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember srt:MaximumMember aig:MeasurementInputYieldMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:OtherContractMember 2019-12-31 0000005272 aig:DebtIssuedOrGuaranteedMember 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:InterestRateContractMember 2019-12-31 0000005272 country:US us-gaap:PensionCostsMember 2019-01-01 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember aig:Maturity31To90DaysMember us-gaap:USStatesAndPoliticalSubdivisionsMember 2020-12-31 0000005272 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0000005272 aig:SecuredFinancingsMember aig:Maturity91To364DaysMember 2019-12-31 0000005272 us-gaap:FairValueInputsLevel3Member us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:DiscountedCashflowValuationTechniqueMember 2020-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FixedMaturitiesMember 2020-12-31 0000005272 aig:UsPersonalInsuranceMember aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member 2020-01-01 2020-12-31 0000005272 aig:UsExcessCasualtyMember aig:AdverseDevelopmentReinsuranceMember aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member 2020-01-01 2020-12-31 0000005272 us-gaap:EquityContractMember us-gaap:NondesignatedMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2019-12-31 0000005272 srt:MinimumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputDynamicLapseMultiplierMember 2020-12-31 0000005272 aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember aig:UsFinancialLinesMember 2019-12-31 0000005272 aig:SecuredFinancingsMember us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:MaturityUpTo30DaysMember aig:BondsAvailableForSaleSecuritiesMember 2019-12-31 0000005272 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2019-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:InterestRateContractMember 2019-12-31 0000005272 srt:WeightedAverageMember aig:MeasurementInputYieldMember us-gaap:CommercialMortgageBackedSecuritiesMember 2020-12-31 0000005272 aig:MezzanineTranchesMember 2020-12-31 0000005272 aig:OtherHedgeFundsMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2019-12-31 0000005272 aig:InsuranceContractsMember us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel2Member 2019-12-31 0000005272 aig:FairValueAssetsImpairmentChargesMeasuredOnNonrecurringBasisDomain 2020-12-31 0000005272 aig:NetRealizedCapitalGainsLossesMember aig:PolicyholderContractDepositsMember 2020-01-01 2020-12-31 0000005272 aig:OtherProductLinesMember srt:ConsolidationEliminationsMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member us-gaap:FutureMember 2020-12-31 0000005272 aig:DebtNotGuaranteedMember aig:OtherNotesBondsLoansAndMortgagesPayableMember 2020-01-01 2020-12-31 0000005272 aig:CommercialMortgageMember 2017-12-31 0000005272 aig:InternationalMember 2019-12-31 0000005272 country:US 2020-12-31 0000005272 aig:OtherHedgeFundsMember 2019-12-31 0000005272 aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember aig:UsWorkersCompensationMember 2019-12-31 0000005272 aig:UsPersonalInsuranceMember aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember aig:AdverseDevelopmentReinsuranceMember 2020-01-01 2020-12-31 0000005272 aig:FairValueOptionElectionMember us-gaap:LongTermDebtMember 2019-01-01 2019-12-31 0000005272 us-gaap:GuaranteedMinimumDeathBenefitMember aig:NetDepositPlusMinimumReturnContractMember 2019-12-31 0000005272 srt:WeightedAverageMember aig:MeasurementInputYieldMember us-gaap:CommercialMortgageBackedSecuritiesMember 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:CreditRiskContractMember 2019-12-31 0000005272 us-gaap:CorporateDebtSecuritiesMember srt:WeightedAverageMember aig:MeasurementInputYieldMember 2019-12-31 0000005272 aig:UsWorkersCompensationMember aig:IncurredImpactOfAdverseDevelopmentCoverMember 2020-12-31 0000005272 aig:LifeInsuranceCompaniesMember aig:DomesticMember 2020-12-31 0000005272 aig:DomesticMember aig:GeneralInsuranceMember 2018-01-01 2018-12-31 0000005272 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0000005272 srt:MaximumMember us-gaap:CreditIndexProductMember us-gaap:MeasurementInputLapseRateMember 2020-12-31 0000005272 aig:GeneralInsuranceMember aig:NorthAmericaOperatingSegmentMember us-gaap:DistributionRightsMember 2017-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:USTreasuryAndGovernmentMember 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember us-gaap:AccumulatedOtherThanTemporaryImpairmentMember 2019-12-31 0000005272 srt:MinimumMember aig:IndexLifeMember us-gaap:MeasurementInputMortalityRateMember 2019-12-31 0000005272 srt:MinimumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputEquityVolatilityMember 2019-12-31 0000005272 srt:ConsolidationEliminationsMember aig:UnallocatedLossAdjustmentExpensesMember 2020-12-31 0000005272 us-gaap:NotesPayableOtherPayablesMember us-gaap:UnsecuredDebtMember aig:ValidusHoldingsLtdMember 2019-12-31 0000005272 aig:UsExcessCasualtyMember aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member 2018-01-01 2018-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2018-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortDurationInsuranceContractAccidentYear2020Member 2020-12-31 0000005272 aig:ValidusHoldingsLtdMember aig:InternationalOperatingSegmentMember 2018-07-18 0000005272 aig:GeneralInsuranceMember aig:ForeignMember 2018-01-01 2018-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:EquitySecuritiesMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:USAndForeignHighYieldDebtSecuritiesMember 2019-12-31 0000005272 country:US aig:InsuranceContractsMember us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel2Member 2020-12-31 0000005272 aig:UsExcessCasualtyMember aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member 2019-01-01 2019-12-31 0000005272 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2019-12-31 0000005272 srt:MaximumMember us-gaap:CreditIndexProductMember aig:MeasurementInputOptionsBudgetMember 2020-12-31 0000005272 srt:MaximumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputDynamicLapseMultiplierMember 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member us-gaap:ForeignExchangeContractMember 2019-12-31 0000005272 aig:BondsTradingSecuritiesMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2020-01-01 2020-12-31 0000005272 aig:FairValueOptionElectionMember us-gaap:LongTermDebtMember 2018-01-01 2018-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member us-gaap:InterestRateContractMember 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2020-12-31 0000005272 srt:MinimumMember us-gaap:NotesPayableOtherPayablesMember us-gaap:UnsecuredDebtMember aig:AIGLifeHoldingsUSIncMember 2020-12-31 0000005272 aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember aig:AdverseDevelopmentReinsuranceMember aig:UsWorkersCompensationMember 2020-01-01 2020-12-31 0000005272 us-gaap:DistributionRightsMember 2019-01-01 2019-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2018-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:CorporateDebtSecuritiesMember us-gaap:MaturityUpTo30DaysMember 2019-12-31 0000005272 us-gaap:EquitySecuritiesMember 2020-01-01 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:CommercialMortgageBackedSecuritiesMember 2018-12-31 0000005272 aig:LifeInsuranceCompaniesMember us-gaap:DistributionRightsMember 2019-01-01 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:CorporateDebtSecuritiesMember us-gaap:MaturityUpTo30DaysMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel2Member us-gaap:CashAndCashEquivalentsMember 2019-12-31 0000005272 aig:FairValueOptionElectionMember 2019-12-31 0000005272 aig:SecuredFinancingsMember us-gaap:FixedMaturitiesMember 2019-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2020-12-31 0000005272 aig:AdverseDevelopmentReinsuranceMember aig:UsWorkersCompensationMember 2020-12-31 0000005272 srt:MaximumMember aig:MeasurementInputYieldMember us-gaap:CommercialMortgageBackedSecuritiesMember 2019-12-31 0000005272 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2020-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:ForeignExchangeContractMember 2020-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2018-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2011-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:EquityContractMember 2019-12-31 0000005272 aig:GeneralInsuranceMember aig:InternationalOperatingSegmentMember us-gaap:DistributionRightsMember 2019-01-01 2019-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2018-12-31 0000005272 aig:ShortdurationInsuranceContractsAccidentYearsPriorToCurrentYearMember aig:UsFinancialLinesMember 2020-12-31 0000005272 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember 2020-01-01 2020-12-31 0000005272 us-gaap:DistributionRightsMember 2020-01-01 2020-12-31 0000005272 us-gaap:PerformanceSharesMember aig:LongTermIncentivePlanYearThreeMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:OtherContractMember 2020-12-31 0000005272 2019-06-28 2019-06-28 0000005272 us-gaap:NondesignatedMember aig:PolicyholderBenefitsAndClaimsIncurredMember 2018-01-01 2018-12-31 0000005272 srt:MinimumMember us-gaap:GuaranteedMinimumDeathBenefitMember aig:NetDepositPlusMinimumReturnContractMember 2019-01-01 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2018-12-31 0000005272 aig:OtherProductLinesMember aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member 2020-01-01 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:ForeignGovernmentDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member 2019-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember srt:MinimumMember aig:MeasurementInputYieldMember 2020-12-31 0000005272 country:US us-gaap:PensionCostsMember 2019-12-31 0000005272 country:US 2020-01-01 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember us-gaap:FairValueInputsLevel2Member 2019-12-31 0000005272 us-gaap:ValuationAllowanceOfDeferredTaxAssetsMember 2018-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember aig:USEquitySecuritiesMember us-gaap:FairValueInputsLevel12And3Member 2019-12-31 0000005272 aig:UsPersonalInsuranceMember us-gaap:ShortDurationInsuranceContractAccidentYear2020Member 2020-12-31 0000005272 us-gaap:FairValueInputsLevel2Member aig:OtherAssetsMiscellaneousMember 2019-12-31 0000005272 us-gaap:AllowanceForUncollectiblePremiumsReceivableMember 2019-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember aig:IncurredImpactOfAdverseDevelopmentCoverMember 2020-12-31 0000005272 us-gaap:CommonStockMember 2020-01-01 2020-12-31 0000005272 aig:AdverseDevelopmentReinsuranceMember aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member 2016-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member 2020-12-31 0000005272 srt:MinimumMember aig:MeasurementInputYieldMember aig:CertainCollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2019-12-31 0000005272 us-gaap:SecuredDebtMember srt:MinimumMember us-gaap:NotesPayableOtherPayablesMember 2020-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember srt:MaximumMember us-gaap:MeasurementInputLossSeverityMember 2020-12-31 0000005272 aig:InternationalOperatingSegmentMember 2019-01-01 2019-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member 2018-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2011-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2018-12-31 0000005272 srt:NorthAmericaMember 2018-12-31 0000005272 us-gaap:ForeignExchangeContractMember 2018-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member aig:USAndForeignHighYieldDebtSecuritiesMember 2020-12-31 0000005272 aig:SecuredFinancingsMember aig:BondsAvailableForSaleSecuritiesMember us-gaap:ForeignGovernmentDebtSecuritiesMember us-gaap:MaturityOvernightAndOnDemandMember 2019-12-31 0000005272 aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember aig:UsFinancialLinesMember 2018-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2018-12-31 0000005272 aig:UsPropertyAndSpecialRisksMember aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member 2018-01-01 2018-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquityContractMember 2020-12-31 0000005272 us-gaap:PerformanceSharesMember aig:LongTermIncentivePlanYearFourMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel12And3Member us-gaap:PrivateEquityFundsMember 2019-12-31 0000005272 aig:GeneralInsuranceMember aig:InternationalOperatingSegmentMember us-gaap:DistributionRightsMember 2020-01-01 2020-12-31 0000005272 us-gaap:AccumulatedTranslationAdjustmentMember 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember us-gaap:FairValueInputsLevel3Member 2020-12-31 0000005272 aig:AllowanceForMortgageAndOtherLoansReceivableMember 2018-12-31 0000005272 aig:GeneralInsuranceMember aig:ForeignMember 2019-01-01 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:AssetBackedSecuritiesMember us-gaap:FairValueInputsLevel2Member 2020-12-31 0000005272 us-gaap:NoncumulativePreferredStockMember 2020-01-01 2020-12-31 0000005272 us-gaap:EquitySecuritiesMember us-gaap:InvestmentIncomeMember 2019-01-01 2019-12-31 0000005272 aig:AdverseDevelopmentReinsuranceMember aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2018-12-31 0000005272 aig:AdverseDevelopmentReinsuranceMember aig:UsFinancialLinesMember us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member 2020-12-31 0000005272 us-gaap:GuaranteedMinimumDeathBenefitMember 2019-12-31 0000005272 us-gaap:UnsecuredDebtMember srt:MaximumMember us-gaap:JuniorSubordinatedDebtMember aig:AIGLifeHoldingsUSIncMember 2020-12-31 0000005272 srt:WeightedAverageMember us-gaap:USStatesAndPoliticalSubdivisionsMember aig:MeasurementInputYieldMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member us-gaap:InterestRateContractMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:AssetBackedSecuritiesMember us-gaap:FairValueInputsLevel2Member 2020-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:InterestRateContractMember 2020-12-31 0000005272 aig:NetOfImpactOfAdverseDevelopmentReinsuranceCoverMember us-gaap:OtherInsuranceProductLineMember 2020-12-31 0000005272 us-gaap:JuniorSubordinatedDebtMember us-gaap:UnsecuredDebtMember 2019-12-31 0000005272 aig:OtherInvestedAssetsMember us-gaap:OtherIncomeMember 2020-01-01 2020-12-31 0000005272 us-gaap:USTreasuryAndGovernmentMember us-gaap:FixedMaturitiesMember 2020-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember srt:MaximumMember us-gaap:MeasurementInputConstantPrepaymentRateMember 2019-12-31 0000005272 us-gaap:FairValueInputsLevel3Member aig:FairValueAssetsImpairmentChargesMeasuredOnNonrecurringBasisDomain 2020-12-31 0000005272 aig:InstitutionalMarketsMember 2020-12-31 0000005272 srt:MinimumMember us-gaap:CreditIndexProductMember us-gaap:MeasurementInputLapseRateMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member us-gaap:OtherContractMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member us-gaap:EquityContractMember 2020-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2020-12-31 0000005272 us-gaap:ForeignExchangeContractMember 2019-12-31 0000005272 aig:InsuranceContractsMember us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel12And3Member 2020-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember 2020-12-31 0000005272 srt:MaximumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember us-gaap:MeasurementInputUtilizationRateMember 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member 2012-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2014-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2020-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2018-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member 2018-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2020-12-31 0000005272 us-gaap:CreditRiskContractMember us-gaap:NondesignatedMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member aig:USAndForeignHighYieldDebtSecuritiesMember 2019-12-31 0000005272 us-gaap:GuaranteedMinimumDeathBenefitMember aig:HighestContractValueAttainedContractMember 2020-12-31 0000005272 aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember aig:UsWorkersCompensationMember 2018-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2017-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2020-01-01 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortDurationInsuranceContractAccidentYear2019Member 2020-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortDurationInsuranceContractAccidentYear2020Member 2020-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2020-01-01 2020-12-31 0000005272 aig:ShortDurationInsuranceMember 2019-12-31 0000005272 aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember aig:AdverseDevelopmentReinsuranceMember aig:UsWorkersCompensationMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel3Member aig:USEquitySecuritiesMember 2019-12-31 0000005272 aig:DomesticMember aig:GeneralInsuranceMember 2019-12-31 0000005272 us-gaap:EquitySecuritiesMember us-gaap:OtherIncomeMember 2019-01-01 2019-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2014-12-31 0000005272 aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember aig:UsWorkersCompensationMember 2020-01-01 2020-12-31 0000005272 aig:CommercialLoansOtherLoansAndNotesReceivableMember 2019-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2019-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2015-12-31 0000005272 aig:OtherProductLinesMember aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member 2018-01-01 2018-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember aig:CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember us-gaap:FairValueInputsLevel2Member 2020-12-31 0000005272 aig:AlternativeFundsMember 2019-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2016-12-31 0000005272 aig:OtherAssetsMiscellaneousMember 2019-12-31 0000005272 us-gaap:NondesignatedMember aig:PolicyholderBenefitsAndClaimsIncurredMember 2019-01-01 2019-12-31 0000005272 aig:AdverseDevelopmentReinsuranceMember aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member 2019-12-31 0000005272 us-gaap:EquitySecuritiesMember 2019-01-01 2019-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member 2017-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member 2017-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member 2020-01-01 2020-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2015-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member 2017-12-31 0000005272 srt:MaximumMember us-gaap:GuaranteedMinimumDeathBenefitMember aig:NetDepositPlusMinimumReturnContractMember 2020-01-01 2020-12-31 0000005272 aig:AlternativeFundsMember 2020-12-31 0000005272 us-gaap:RealEstateInvestmentMember 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:MaturityUpTo30DaysMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel3Member us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:DiscountedCashflowValuationTechniqueMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:AssetBackedSecuritiesMember us-gaap:FairValueInputsLevel12And3Member 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquityContractMember 2019-12-31 0000005272 srt:ParentCompanyMember aig:AIGFPOperatingMember 2020-12-31 0000005272 aig:LifeInsuranceCompaniesMember 2020-12-31 0000005272 srt:ParentCompanyMember us-gaap:OtherAssetsMember 2020-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2017-12-31 0000005272 aig:JuniorSubordinatedDebentures575PercentSeriesA2Member 2020-01-01 2020-12-31 0000005272 aig:AdverseDevelopmentReinsuranceMember aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member 2018-12-31 0000005272 us-gaap:NondesignatedMember 2020-01-01 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel12And3Member 2019-12-31 0000005272 us-gaap:PreferredStockIncludingAdditionalPaidInCapitalMember 2018-01-01 2018-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2016-12-31 0000005272 aig:AdverseDevelopmentReinsuranceMember aig:UsFinancialLinesMember us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member 2018-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:ForeignGovernmentDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember aig:USEquitySecuritiesMember us-gaap:FairValueInputsLevel12And3Member 2020-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2018-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortDurationInsuranceContractAccidentYear2019Member 2020-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2020-01-01 2020-12-31 0000005272 us-gaap:FairValueInputsLevel1Member aig:OtherAssetsMiscellaneousMember 2019-12-31 0000005272 us-gaap:DistributionRightsMember 2019-12-31 0000005272 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2019-12-31 0000005272 aig:UsPersonalInsuranceMember aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember aig:AdverseDevelopmentReinsuranceMember 2020-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:PensionCostsMember 2018-01-01 2018-12-31 0000005272 srt:MinimumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputEquityInterestRateCorrelationMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:ForeignEquitySecuritiesMember 2020-12-31 0000005272 aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member aig:EuropeAndJapanPersonalInsuranceMember 2018-01-01 2018-12-31 0000005272 srt:MaximumMember us-gaap:CreditIndexProductMember us-gaap:MeasurementInputLapseRateMember 2019-12-31 0000005272 srt:MinimumMember us-gaap:UnsecuredDebtMember us-gaap:JuniorSubordinatedDebtMember aig:AIGLifeHoldingsUSIncMember 2020-12-31 0000005272 aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember aig:UsPropertyAndSpecialRisksMember aig:AdverseDevelopmentReinsuranceMember 2020-01-01 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:PrivateEquityFundsMember 2020-12-31 0000005272 aig:FairValueOptionElectionMember aig:AlternativeFundsMember 2019-01-01 2019-12-31 0000005272 aig:UsExcessCasualtyMember aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:CreditRiskContractMember 2020-12-31 0000005272 aig:UsExcessCasualtyMember aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember 2020-01-01 2020-12-31 0000005272 us-gaap:FairValueInputsLevel1Member aig:FairValueAssetsImpairmentChargesMeasuredOnNonrecurringBasisDomain 2020-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:EmbeddedDerivativeFinancialInstrumentsMember 2019-01-01 2019-12-31 0000005272 country:US us-gaap:FixedMaturitiesMember 2019-12-31 0000005272 aig:LifeInsuranceCompaniesMember aig:DomesticMember 2020-01-01 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:DefinedBenefitPlanEquitySecurityNonUsMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel3Member aig:OtherAssetsMiscellaneousMember 2020-12-31 0000005272 aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember aig:UsPropertyAndSpecialRisksMember 2020-01-01 2020-12-31 0000005272 aig:InsuranceContractsMember us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:DefinedBenefitPlanEquitySecurityNonUsMember 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2019-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2015-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2020-12-31 0000005272 srt:MinimumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputBaseLapseRatesMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember 2020-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member 2020-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member 2016-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member 2020-01-01 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2016-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2014-12-31 0000005272 aig:SecuredFinancingsMember 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2017-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2020-01-01 2020-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2014-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2019-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortDurationInsuranceContractAccidentYear2020Member 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member 2017-12-31 0000005272 srt:NorthAmericaMember 2018-01-01 2018-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember aig:MeasurementInputConstantDefaultRateMember srt:WeightedAverageMember 2020-12-31 0000005272 us-gaap:CorporateAndOtherMember us-gaap:DistributionRightsMember 2020-01-01 2020-12-31 0000005272 us-gaap:FairValueHedgingMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:InvestmentIncomeMember us-gaap:InterestRateContractMember 2019-01-01 2019-12-31 0000005272 us-gaap:AllOtherCorporateBondsMember 2020-12-31 0000005272 aig:DebtNotGuaranteedMember aig:DebtOfConsolidatedInvestmentsMember 2020-01-01 2020-12-31 0000005272 us-gaap:TreasuryStockMember 2018-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:CashAndCashEquivalentsMember 2019-12-31 0000005272 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2020-12-31 0000005272 srt:ParentCompanyMember us-gaap:NotesPayableOtherPayablesMember 2019-12-31 0000005272 us-gaap:DistributionRightsMember 2020-12-31 0000005272 aig:GeneralInsuranceMember aig:InternationalOperatingSegmentMember 2020-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2020-01-01 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:CorporateDebtSecuritiesMember aig:Maturity91To364DaysMember 2019-12-31 0000005272 aig:FairValueOptionElectionMember us-gaap:LongTermDebtMember 2020-01-01 2020-12-31 0000005272 srt:MinimumMember us-gaap:NotesPayableOtherPayablesMember us-gaap:UnsecuredDebtMember 2020-12-31 0000005272 aig:OtherInvestedAssetsMember aig:NetRealizedCapitalGainsLossesMember 2020-01-01 2020-12-31 0000005272 aig:GeneralInsuranceMember aig:NorthAmericaOperatingSegmentMember 2019-01-01 2019-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member 2018-12-31 0000005272 aig:OnemainHoldingsIncMember 2018-01-01 2018-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member 2018-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member 2020-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2014-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2018-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member 2020-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2013-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2015-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortDurationInsuranceContractAccidentYear2019Member 2020-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2014-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member 2019-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2020-12-31 0000005272 us-gaap:OtherIncomeMember aig:PolicyholderContractDepositsMember 2020-01-01 2020-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:OtherContractMember 2020-12-31 0000005272 us-gaap:OtherContractMember 2020-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:EmbeddedDerivativeFinancialInstrumentsMember 2018-01-01 2018-12-31 0000005272 aig:ShortDurationInsuranceMember 2018-12-31 0000005272 us-gaap:OtherIncomeMember aig:BondsAvailableForSaleSecuritiesMember 2020-01-01 2020-12-31 0000005272 us-gaap:AccumulatedOtherThanTemporaryImpairmentMember 2018-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member 2020-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2020-12-31 0000005272 us-gaap:EquitySecuritiesMember 2020-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2016-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member 2020-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member 2018-12-31 0000005272 aig:UsExcessCasualtyMember aig:AdverseDevelopmentReinsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2020-12-31 0000005272 aig:UsExcessCasualtyMember aig:AdverseDevelopmentReinsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member 2018-12-31 0000005272 aig:LifeInsuranceCompaniesMember 2018-01-01 2018-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel12And3Member us-gaap:ForeignGovernmentDebtSecuritiesMember 2020-12-31 0000005272 us-gaap:FairValueInputsLevel3Member aig:DiscountedCashflowValuationTechniqueMember aig:CertainCollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2020-12-31 0000005272 aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember aig:AdverseDevelopmentReinsuranceMember aig:UsWorkersCompensationMember 2018-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member 2019-01-01 2019-12-31 0000005272 aig:FairValueOptionElectionMember 2018-01-01 2018-12-31 0000005272 us-gaap:GuaranteedMinimumDeathBenefitMember 2017-12-31 0000005272 srt:MaximumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputDynamicLapseMultiplierMember 2020-12-31 0000005272 us-gaap:NondesignatedMember 2019-01-01 2019-12-31 0000005272 us-gaap:ResidentialMortgageMember 2019-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:InterestRateContractMember 2020-01-01 2020-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortDurationInsuranceContractAccidentYear2019Member 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2016-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2018-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member 2018-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2020-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2020-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2018-12-31 0000005272 aig:UsExcessCasualtyMember aig:AdverseDevelopmentReinsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2017-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2017-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member 2014-12-31 0000005272 aig:UsPropertyAndSpecialRisksMember 2020-01-01 2020-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortDurationInsuranceContractAccidentYear2019Member 2020-01-01 2020-12-31 0000005272 aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member 2020-01-01 2020-12-31 0000005272 aig:UsFinancialLinesMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2013-12-31 0000005272 aig:FixedAnnuitiesMember 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:USTreasuryAndGovernmentMember 2019-12-31 0000005272 us-gaap:ResidentialMortgageMember 2020-12-31 0000005272 aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000005272 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0000005272 country:GB 2019-12-31 0000005272 srt:MinimumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputMortalityMultiplierMember 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember us-gaap:CorporateDebtSecuritiesMember 2019-12-31 0000005272 country:US us-gaap:PensionCostsMember aig:Age65AndOlderMember 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember aig:Maturity31To90DaysMember us-gaap:CorporateDebtSecuritiesMember 2019-12-31 0000005272 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:MeasurementInputLossSeverityMember srt:WeightedAverageMember 2020-12-31 0000005272 us-gaap:OtherIncomeMember aig:BondsTradingSecuritiesMember 2019-01-01 2019-12-31 0000005272 country:US us-gaap:EquitySecuritiesMember 2020-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel12And3Member aig:ForeignEquitySecuritiesMember 2020-12-31 0000005272 aig:UsPersonalInsuranceMember aig:AdverseDevelopmentReinsuranceMember 2020-12-31 0000005272 us-gaap:RealEstateInvestmentMember 2019-12-31 0000005272 aig:AlternativeFundsMember us-gaap:FairValueMeasurementsNonrecurringMember 2019-01-01 2019-12-31 0000005272 aig:NorthAmericaOperatingSegmentMember 2017-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:ForeignExchangeContractMember 2019-12-31 0000005272 us-gaap:FairValueInputsLevel3Member aig:DiscountedCashflowValuationTechniqueMember us-gaap:USStatesAndPoliticalSubdivisionsMember 2019-12-31 0000005272 us-gaap:NondesignatedMember us-gaap:OtherContractMember 2019-01-01 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member us-gaap:ForeignGovernmentDebtSecuritiesMember 2019-12-31 0000005272 srt:MaximumMember aig:MeasurementInputBaseLapseRatesMember aig:IndexLifeMember 2019-12-31 0000005272 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USTreasuryAndGovernmentMember 2019-12-31 0000005272 us-gaap:GuaranteedMinimumDeathBenefitMember aig:NetDepositPlusMinimumReturnContractMember 2020-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2014-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member 2019-12-31 0000005272 us-gaap:OtherAssetsMember 2019-01-01 2019-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2015-12-31 0000005272 srt:WeightedAverageMember aig:MeasurementInputYieldMember aig:CertainCollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember 2020-12-31 0000005272 us-gaap:RetainedEarningsMember 2019-12-31 0000005272 aig:AdverseDevelopmentReinsuranceMember aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2018-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member 2020-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2016-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member 2020-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember aig:ShortdurationInsuranceContractsAccidentYearsPriorToCurrentYearMember 2020-12-31 0000005272 us-gaap:AllowanceForReinsuranceRecoverableMember 2017-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:DefinedBenefitPlanEquitySecurityNonUsMember 2019-12-31 0000005272 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:AssetBackedSecuritiesMember us-gaap:FairValueInputsLevel12And3Member 2019-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember aig:SecuredFinancingsMember aig:Maturity31To90DaysMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2019-12-31 0000005272 aig:LifeInsuranceCompaniesMember aig:ForeignMember 2018-01-01 2018-12-31 0000005272 srt:MaximumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputMortalityMultiplierMember 2019-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member us-gaap:EquityContractMember 2019-12-31 0000005272 aig:PurchasedCreditImpairedSecuritiesMember us-gaap:AvailableforsaleSecuritiesMember 2019-12-31 0000005272 us-gaap:InvestmentIncomeMember aig:BondsAvailableForSaleSecuritiesMember 2019-01-01 2019-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2018-12-31 0000005272 aig:AdverseDevelopmentReinsuranceMember aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member 2020-12-31 0000005272 aig:AdverseDevelopmentReinsuranceMember aig:UsWorkersCompensationMember us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member 2018-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2016-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member 2019-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2012-12-31 0000005272 aig:GrowthEquityMember 2019-12-31 0000005272 country:GB 2019-01-01 2019-12-31 0000005272 country:US us-gaap:PensionCostsMember 2020-01-01 2020-12-31 0000005272 aig:BondsAvailableForSaleSecuritiesMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2018-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:DefinedBenefitPlanEquitySecurityNonUsMember aig:USEquitySecuritiesMember 2020-12-31 0000005272 aig:DebtNotGuaranteedMember aig:OtherNotesBondsLoansAndMortgagesPayableMember 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel2Member aig:USAndForeignHighYieldDebtSecuritiesMember 2020-12-31 0000005272 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2020-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel2Member us-gaap:CashAndCashEquivalentsMember 2019-12-31 0000005272 aig:GroupRetirementSegmentMember 2020-12-31 0000005272 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member us-gaap:CreditRiskContractMember 2019-12-31 0000005272 country:US us-gaap:PensionPlansDefinedBenefitMember us-gaap:AssetBackedSecuritiesMember us-gaap:FairValueInputsLevel12And3Member 2019-12-31 0000005272 srt:MaximumMember us-gaap:GuaranteedMinimumWithdrawalBenefitMember aig:MeasurementInputEquityVolatilityMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember us-gaap:FairValueInputsLevel1Member aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:AssetBackedSecuritiesMember 2019-12-31 0000005272 aig:ShortDurationInsuranceContractsAccidentYearsPriorTo2011Member aig:UsWorkersCompensationMember 2020-01-01 2020-12-31 0000005272 aig:UsPersonalInsuranceMember aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember 2020-12-31 0000005272 aig:StockPurchaseRightsMember 2020-01-01 2020-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2017-12-31 0000005272 aig:OtherMortgagesMember 2018-12-31 0000005272 aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member 2018-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2019-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2017-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member 2020-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member 2020-12-31 0000005272 aig:UsExcessCasualtyMember aig:AdverseDevelopmentReinsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member 2017-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2013-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member 2019-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member 2019-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member 2020-12-31 0000005272 aig:EuropePropertyAndSpecialtyRisksMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2013-12-31 0000005272 aig:AdverseDevelopmentReinsuranceMember aig:UsWorkersCompensationMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2017-12-31 0000005272 us-gaap:NotesPayableOtherPayablesMember us-gaap:UnsecuredDebtMember 2020-12-31 0000005272 aig:EuropeAndJapanPersonalInsuranceMember us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member 2017-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member 2018-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortDurationInsuranceContractAccidentYear2019Member 2020-01-01 2020-12-31 0000005272 aig:UsExcessCasualtyMember us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member 2017-12-31 0000005272 aig:AlternativeFundsMember 2019-12-31 0000005272 us-gaap:PensionPlansDefinedBenefitMember aig:DefinedBenefitPlanEquitySecurityNonUsMember us-gaap:FairValueInputsLevel3Member us-gaap:CashAndCashEquivalentsMember 2019-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember aig:AdverseDevelopmentReinsuranceMember 2020-12-31 0000005272 us-gaap:GuaranteedMinimumDeathBenefitMember 2019-01-01 2019-12-31 0000005272 aig:UsPersonalInsuranceMember aig:ShortDurationInsuranceContractsLastTenAccidentYearsMember aig:AdverseDevelopmentReinsuranceMember 2019-12-31 0000005272 us-gaap:OtherInsuranceProductLineMember aig:AdverseDevelopmentReinsuranceMember 2020-01-01 2020-12-31 0000005272 aig:SecuredFinancingsMember aig:Maturity31To90DaysMember 2020-12-31