AFG


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:BenefitsLossesAndExpenses

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:InterestExpense

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetInvestmentIncome
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:InvestmentType
us-gaap:InvestmentType, us-gaap:StatementOperatingActivitiesSegment
us-gaap:StatementBusinessSegments

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherIncome
us-gaap:StatementBusinessSegments

us-gaap:ProfitLoss
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:RealizedInvestmentGainsLosses

us-gaap:Revenues

us-gaap:Assets
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:StatementBusinessSegments

us-gaap:Liabilities
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:ConsolidatedEntities

us-gaap:AmortizationOfIntangibleAssets

us-gaap:Goodwill
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:StatementBusinessSegments

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:DeferredTaxAssetsLiabilitiesNet
afg:ComponentsOfDeferredTaxAssetsAndLiabilities

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:EquitySecuritiesFvNi
us-gaap:BalanceSheetLocation, us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ConsolidatedEntities
us-gaap:FairValueByAssetClass
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FinancialInstrument

us-gaap:OtherAssets
us-gaap:ConsolidatedEntities
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:LongTermDebt
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByMeasurementBasis

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:BusinessAcquisition, us-gaap:StatementEquityComponents
us-gaap:ConsolidatedEntities
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:Range, us-gaap:StatementEquityComponents, us-gaap:SubsequentEventType
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
afg:ComponentsOfDeferredTaxAssetsAndLiabilities
us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet
afg:ComponentsOfDeferredTaxAssetsAndLiabilities

us-gaap:DeferredTaxAssetsValuationAllowance
afg:ComponentsOfDeferredTaxAssetsAndLiabilities
us-gaap:ConsolidatedEntities
afg:AmortizationOfDeferredLossOnReinsurance

afg:AmountPaidBySubsidiariesToPurchaseManagedInvestmentEntitiesLiabilitiesAfterIssuanceDate.

afg:AnnuityAndSupplementalInsuranceAcquisitionExpenses

afg:AnnuityBenefits

afg:AnnuityReceiptsCeded

afg:CededAnnuitySurrendersBenefitsAndWithdrawals
us-gaap:ConsolidatedEntities, us-gaap:ReinsurancePolicyType
afg:CededInforceAnnuityBusiness
us-gaap:SubsequentEventType
us-gaap:FinancialInstrument
afg:ChangeInUnrealizedAppreciationDepreciation

afg:ChangeinManagedInvestmentEntitiesAssetsAndLiabilities

afg:DeferredAnnuityAndLifePolicyAcquisitionCosts
us-gaap:ConsolidatedEntities
afg:DeferredLossOnCededReserves

afg:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfit
us-gaap:StatementBusinessSegments

afg:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortizationExpenseNetInvestmentGainsLosses
us-gaap:StatementBusinessSegments

afg:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsForeignCurrencyTranslationAdjustment

afg:DeferredPolicyAcquisitionCostsandPresentValueofFutureProfitsChangeinUnrealizedInvestmentGainLoss
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
afg:DeferredPolicyAcquisitionCostsandValueofBusinessAcquiredUnrealizedInvestmentGainLossChangeinUnrealized
us-gaap:StatementBusinessSegments
afg:DeferredSalesInducementsAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfit
us-gaap:StatementBusinessSegments
afg:DeferredSalesInducementsAmortizationExpenseNetInvestmentGainsLosses
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
afg:DerivativeGainLossOnDerivativeAnnuityUnlocking
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation
afg:DiscontinuedOperationIncomeLossFromDiscontinuedOperationAfterIncomeTaxAndBeforeGainLossOnDisposalOfDiscontinuedOperation
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperationOther
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation
afg:DisposalGroupIncludingDiscontinuedOperationNetInvestmentIncome
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation
afg:DisposalGroupIncludingDiscontinuedOperationsAnnuityAndSupplementalInsuranceAcquisitionExpenses
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation
afg:DisposalGroupIncludingDiscontinuedOperationsAnnuityBenefits
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsExpensesFromDivestitureOfBusinesses
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation
afg:DisposalGroupIncludingDiscontinuedOperationsMarketableSecuritiesRealizedGainLoss
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsProceedsFromDivestitureOfBusinessesNet
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsProceedsFromDivestitureOfBusinessesNetOfExpenses
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsReclassificationOfNetDeferredTaxAssets
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupNetEarningsAfterTax
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupTotalLossFromExitedLinesPretax
us-gaap:StatementOperatingActivitiesSegment
afg:EarningsFromRealEstateRelatedInvestmentsNetOfDAC

afg:EarningsLossesOfVariableInterestEntitiesAttributableToShareholders
us-gaap:ConsolidatedEntities, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:StatementOperatingActivitiesSegment
us-gaap:ConsolidatedEntities, us-gaap:StatementOperatingActivitiesSegment
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:EstimatedProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:EstimatedProceedsFromDivestitureOfInterestInConsolidatedSubsidiariesNetOfExpenses

afg:ExpensesOfManagedInvestmentEntities

afg:FaceAmountOfManagedInvestmentEntitiesLiabilitiesPurchasedBySubsidiariesAfterIssuanceDate
us-gaap:Range, us-gaap:DerivativeInstrumentRisk
afg:FairValueInputAdjustmentforInsuranceSubsidiarysCreditRisk

afg:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetDispositionOfSubsidiaries
us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityDispositionOfSubsidiaries
us-gaap:FairValueByLiabilityClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:GainLossOnChangeInFairValueOfAssetsOfVariableInterestEntities

afg:GainLossOnChangeInFairValueOfLiabilitiesOfVariableInterestEntities

afg:GainLossonChangeinFairValueofAssetsandLiabilitiesofManagedInvestmentEntities

afg:ImpactofUnlockingChangesintheFairValueofDerivativesandChangesintheStockMarketandInterestRatesontheAccountingforFIAs

afg:IncreaseDecreaseinReinsuranceandOtherReceivables
us-gaap:ConsolidatedEntities
afg:InforceAnnuityBusinessCededPercentOfTotalInforce
us-gaap:SubsequentEventType
us-gaap:ConsolidatedEntities, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
afg:InvestmentAndOtherIncomeNet
us-gaap:StatementBusinessSegments

afg:InvestmentIncomeOfManagedInvestmentEntities
us-gaap:StatementBusinessSegments
afg:LossRecognitionCharge

afg:ManagementFeesPaidByVariableInterestEntities
afg:EquitySecurities, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:FinancialInstrument
afg:NetHoldingGainsLossesOnEquitySecurities

afg:NetTransfersFromToSeparateAccounts

afg:OperatingIncomeLossBeforeRealizedGainsLossesAndIncomeTaxes
us-gaap:StatementBusinessSegments
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:OperatingTaxLiabilitiesTriggeredByPendingSale
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation

afg:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTaxDispositionOfSubsidiaries
us-gaap:StatementEquityComponents

afg:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTaxDispositionOfSubsidiaries

afg:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTaxDispositionOfSubsidiaries

afg:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementReclassificationAdjustmentFromAOCIAfterTax
us-gaap:StatementEquityComponents

afg:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementReclassificationAdjustmentFromAOCIBeforeTax

afg:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementReclassificationAdjustmentFromAOCITax

afg:OtherComprehensiveIncomeLossNetofTaxAttributabletoRedeemableNoncontrollingInterests

afg:OtherComprehensiveIncomeLossNetofTaxincludingPortionAttributabletoNoncontrollingInterest

afg:OtherComprehensiveIncomeLossReclassificationAdjustmentForRealizedGainsLossesIncludedInNetIncomeNetOfTax

afg:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTaxDispositionOfSubsidiaries

afg:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTaxDispositionOfSubsidiaries
us-gaap:StatementEquityComponents

afg:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTaxDispositionOfSubsidiaries

afg:PercentageBasedOnFairValueOfAvailableForSaleFixedMaturitiesThatAreInUnrealizedLossPositionAndRatedInvestmentGrade

afg:PercentageBasedOnUnrealizedLossOfAvailableForSaleFixedMaturitiesThatAreInUnrealizedLossPositionAndRatedInvestmentGrade

afg:PretaxCatastropheLosses

afg:ProceedsFromIssuanceOfManagedInvestmentEntities

afg:ProceedsFromSalesAndRedemptionsOfInvestmentsByManagedInvestmentEntities

afg:ProceedsFromSalesOfRealEstatePropertyAndEquipment

afg:ProceedsReceivedBySubsidiariesRelatedtoSalesandRedemptionsofManagedInvestmentEntitiesLiabilities
us-gaap:Range

afg:PropertyAndCasualtyCommissionsAndOtherUnderwritingExpenses
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ConsolidatedEntities, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
afg:PropertyAndCasualtyInsuranceUnderwritingIncomeLoss
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments, us-gaap:Subsegments

afg:PurchasesOfInvestmentsByManagedInvestmentEntities

afg:PurchasesOfRealEstatePropertyAndEquipment

afg:RealizedGainsLossesOnDisposalOfSubsidiaries
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:AwardType
afg:RestrictedCommonStockIssuedFairValuePerShare

afg:RetirementOfManagedInvestmentEntitiesLiabilities

afg:RevenuesBeforeRealizedGainsLosses
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
afg:SpecialChargesToIncreaseAsbestosAndEnvironmentalReserves

afg:StockRepurchasedSharesExchangedInStockCompensationPlansValue
us-gaap:StatementEquityComponents
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:UnderwritingGainLossPropertyAndCasualtyInsurance
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesGrossRealizedGains
us-gaap:FinancialInstrument, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesGrossRealizedLosses
us-gaap:FinancialInstrument, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationAmountAtParValue
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationAmountAtPurchasePrice
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationDiscountPremium
us-gaap:StatementBusinessSegments
us-gaap:DeferredPolicyAcquisitionCostAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfitOrEstimatedGrossMargin
us-gaap:StatementBusinessSegments
us-gaap:DeferredPolicyAcquisitionCostAmortizationExpenseNetInvestmentGainsLosses
us-gaap:StatementBusinessSegments
us-gaap:DeferredPolicyAcquisitionCostAmortizationExpenseOther
us-gaap:StatementBusinessSegments
us-gaap:DeferredPolicyAcquisitionCostForeignCurrencyTranslationAdjustmentAndOther
us-gaap:StatementBusinessSegments
us-gaap:DeferredPolicyAcquisitionCostsAdditions

us-gaap:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAdditions
us-gaap:StatementBusinessSegments

us-gaap:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:DeferredSalesInducementsAdditions
us-gaap:StatementBusinessSegments
us-gaap:DeferredSalesInducementsAmortizationExpense

us-gaap:DepreciationAmortizationAndAccretionNet
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation
us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation
us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation
us-gaap:DiscontinuedOperationTaxEffectOfDiscontinuedOperation
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation
us-gaap:DisposalGroupIncludingDiscontinuedOperationOperatingExpense
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation
us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherExpense
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation
us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherIncome
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation
us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance

us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsDividends

us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends

us-gaap:EffectiveIncomeTaxRateReconciliationDispositionOfBusiness

us-gaap:EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential

us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpense

us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost

us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments

us-gaap:EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes

us-gaap:EffectiveIncomeTaxRateReconciliationTaxExemptIncome
us-gaap:IncomeStatementLocation
us-gaap:EquitySecuritiesFvNiGainLoss

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss
us-gaap:IncomeStatementLocation

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
us-gaap:FairValueByAssetClass
us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss
us-gaap:FairValueByAssetClass
us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
us-gaap:FairValueByAssetClass
us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
us-gaap:FairValueByAssetClass
us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3
us-gaap:FairValueByAssetClass
us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3
us-gaap:FairValueByAssetClass
us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
us-gaap:FairValueByLiabilityClass
us-gaap:FairValueByLiabilityClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues
us-gaap:FairValueByLiabilityClass
us-gaap:FairValueByLiabilityClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements
us-gaap:FairValueByLiabilityClass
us-gaap:FairValueByLiabilityClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:GainOrLossOnSaleOfStockInSubsidiary

us-gaap:GrossInvestmentIncomeOperating
afg:EquitySecurities, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:FinancialInstrument, us-gaap:IncomeStatementLocation
us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:InvestmentType
us-gaap:Dividends, us-gaap:InvestmentType
us-gaap:InvestmentType

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTax

us-gaap:IncomeLossFromEquityMethodInvestments
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends

us-gaap:IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance

us-gaap:IncomeTaxReconciliationDeductionsDividends

us-gaap:IncomeTaxReconciliationDispositionOfBusiness

us-gaap:IncomeTaxReconciliationForeignIncomeTaxRateDifferential

us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

us-gaap:IncomeTaxReconciliationNondeductibleExpense

us-gaap:IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost

us-gaap:IncomeTaxReconciliationOtherAdjustments

us-gaap:IncomeTaxReconciliationPriorYearIncomeTaxes

us-gaap:IncomeTaxReconciliationTaxExemptIncome

us-gaap:IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInReinsurancePayables

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncurredClaimsPropertyCasualtyAndLiability
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet

us-gaap:InvestmentIncomeInvestmentExpense
afg:QuarterlyOperatingResultsUnaudited, us-gaap:StatementBusinessSegments
us-gaap:LiabilityForAsbestosAndEnvironmentalClaimsNetIncurredLoss1
us-gaap:LossContingenciesByNatureOfContingency
us-gaap:StatementBusinessSegments, us-gaap:Subsegments

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

us-gaap:MarketableSecuritiesRealizedGainLoss
afg:EquitySecurities, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:FinancialInstrument, us-gaap:IncomeStatementLocation
us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:InvestmentType
us-gaap:InvestmentType, us-gaap:StatementBusinessSegments
us-gaap:FinancialInstrument
us-gaap:MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments

us-gaap:NetIncomeLossAttributableToRedeemableNoncontrollingInterest

us-gaap:NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax

us-gaap:OtherComprehensiveIncomeLossBeforeTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

us-gaap:OtherComprehensiveIncomeLossTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherOperatingActivitiesCashFlowStatement
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:OtherOperatingIncomeExpenseNet
us-gaap:FinancialInstrument
us-gaap:OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities

us-gaap:PaymentsForLossesAndLossAdjustmentExpense

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesEquity
us-gaap:BusinessAcquisition
us-gaap:PaymentsToAcquireBusinessesGross

us-gaap:PaymentsToAcquireMortgageNotesReceivable

us-gaap:PaymentsToAcquireOtherInvestments

us-gaap:PremiumReceivableCreditLossExpenseReversal

us-gaap:PremiumsEarnedNetPropertyAndCasualty
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:PresentValueOfFutureInsuranceProfitsAmortizationExpense1

us-gaap:ProceedsFromAnnuitiesAndInvestmentCertificates
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromPaymentsForTradingSecurities

us-gaap:ProceedsFromSaleAndCollectionOfMortgageNotesReceivable

us-gaap:ProceedsFromSaleAndMaturityOfOtherInvestments

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesEquity
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAociCurrentPeriodTax

us-gaap:ReinsuranceRecoverableCreditLossExpenseReversal

us-gaap:RepaymentsOfAnnuitiesAndInvestmentCertificates

us-gaap:StockIssuedDuringPeriodValueDividendReinvestmentPlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueEmployeeBenefitPlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationGross
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityOther
us-gaap:StatementEquityComponents

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

us-gaap:TemporaryEquityOtherChanges
us-gaap:StatementBusinessSegments
us-gaap:WriteOffOfDeferredDebtIssuanceCost

afg:AccumulatedAmortizationOfPresentValueOfFutureProfits

afg:AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentDeferredTaxAndNonControllingInterest
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:StatementOperatingActivitiesSegment
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:StatementOperatingActivitiesSegment

afg:AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentPretax
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:StatementOperatingActivitiesSegment
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:StatementOperatingActivitiesSegment

afg:AggregateGuaranteedMinimumDeathBenefitValueOnVariableAnnuityPoliciesInForce

afg:Aggregateunpaidprincipalbalanceofvariableinterestentityloansindefault
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:AnnuityBenefitsAccumulatedExcludingLifeContingentAnnuities
us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementBasis, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByMeasurementBasis
us-gaap:FinancialInstrument
afg:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValuePercent
us-gaap:FinancialInstrument
afg:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValuePercent
us-gaap:FinancialInstrument
afg:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValuePercent
us-gaap:FinancialInstrument
afg:AvailableForSaleSecuritiesDebtMaturitiesExcludingAbsAndMbsAmortizedCost
us-gaap:FinancialInstrument
afg:AvailableForSaleSecuritiesDebtMaturitiesExcludingAbsAndMbsFairValue
us-gaap:FinancialInstrument
afg:AvailableForSaleSecuritiesDebtMaturitiesExcludingAbsAndMbsFairValuePercent
us-gaap:FinancialInstrument
afg:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValuePercent
us-gaap:FinancialInstrument
afg:AvailableForSaleSecuritiesMbsAmortizedCost
us-gaap:FinancialInstrument
afg:AvailableForSaleSecuritiesMbsFairValuePercent
us-gaap:FinancialInstrument
afg:AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValueAsPercentageOfCost
us-gaap:FinancialInstrument
afg:AvailableforsaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValueAsPercentageOfCost

afg:CarryingAmountOfVariableInterestEntityLoansInDefault
us-gaap:FinancialInstrument
afg:CollateralizedLoanObligationsandOtherAvailableforSaleSecuritiesABSAmortizedCost
us-gaap:FinancialInstrument
afg:CollateralizedLoanObligationsandOtherAvailableforSaleSecuritiesABSFairValue
us-gaap:FinancialInstrument
afg:CollateralizedLoanObligationsandOtherAvailableforSaleSecuritiesABSFairValuePercent
us-gaap:FinancialInstrument
afg:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValueAsPercentageOfCost
us-gaap:FinancialInstrument
afg:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValueAsPercentageOfCost
us-gaap:StatementBusinessSegments
afg:DeferredPolicyAcquisitionCostsandValueofBusinessAcquiredUnrealizedInvestmentGainLoss

afg:DeferredRentandLeaseIncentives

afg:DeferredTaxAssetsForeignUnderwritingLosses
afg:ComponentsOfDeferredTaxAssetsAndLiabilities
afg:ComponentsOfDeferredTaxAssetsAndLiabilities
afg:DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCostImpactOfUnrealizedGains

afg:DeferredTaxLiabilitiesRealEstatePropertyandEquipment
afg:ComponentsOfDeferredTaxAssetsAndLiabilities

afg:DeferredTaxLiabilitiesTaxCutsandJobsActof2017DiscountedReservesTransitionAdjustment
afg:ComponentsOfDeferredTaxAssetsAndLiabilities

afg:DifferenceBetweenAggregateUnpaidPrincipalBalanceAndFairValueOfVariableInterestEntityDebt

afg:DifferenceBetweenAggregateUnpaidPrincipalBalanceAndFairValueOfVariableInterestEntityInvestments
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsDeferredPolicyAcquisitionCosts
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsEquityIndexCallOptions
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsEquityMethodInvestments
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsEquitySecurities
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsFixedMaturitiesAvailableForSale
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsFixedMaturitiesTrading
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsInvestments
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsInvestmentsAndCash
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsLiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsLiabilityForLifeAccidentAndHealthReserves
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsLoansInsurancePolicy
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsMortgageLoansOnRealEstate
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsOtherInvestments
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsPremiumsReceivable
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsReinsuranceRecoverablesOnPaidAndUnpaidLosses
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsSeparateAccountAssets
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:DisposalGroupIncludingDiscontinuedOperationsSeparateAccountsLiability

afg:DividendPaymentsWithoutViolatingMostRestrictiveDebtCovenants
us-gaap:FinancialInstrument
afg:EquitySecuritiesFVNIFairValueinExcessofCost
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:FinancialAssetsNotAccountedForAtFairValue
us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementBasis, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByMeasurementBasis
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:FinancialLiabilitiesNotAccountedForAtFairValue
us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementBasis, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique
afg:InternallyDevelopedLevel3Assets
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:StatementOperatingActivitiesSegment
us-gaap:ConsolidatedEntities
afg:InvestmentInSubsidiariesAndAffiliates

afg:LevelThreeAssetAsPercentageOfAssetMeasuredAtFairValue

afg:LevelThreeAssetsThatWerePricedByPricingServices
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:StatementOperatingActivitiesSegment

afg:LevelThreeAssetsThatWerePricedUsingNonBindingBrokerQuotes
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:StatementOperatingActivitiesSegment

afg:LiabilitiesForExcessBenefitsExpectedToBePaidOnFutureDeathsAndAnnuitizations

afg:LiabilityForLifeAccidentandHealthReserves
us-gaap:ConsolidatedEntities
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
afg:LiabilitytoReturnCashBorrowedRelatedtoSwaps

afg:LifeContingentAnnuities

afg:LongTermCareInsuranceReserves
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:NetAssetsOfBusinessToBeSold

afg:PercentageOfInternallyDevelopedLevelThreeAssetsComparedToTotalLevel3Assets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:StatementOperatingActivitiesSegment

afg:PercentageOfLevelThreeAssetsThatWerePricedByPricingServices
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:StatementOperatingActivitiesSegment

afg:PercentageOfLevelThreeAssetsThatWerePricedUsingNonBindingBrokerQuotes
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:StatementOperatingActivitiesSegment

afg:PercentofSpreadsUsedinThirdPartyPricingModel
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty
afg:RealEstateRelatedInvestmentsPercentByPropertyType
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
afg:ReceivableFromParentForRealEstateRelatedInvestments
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
afg:ReceivableforCollateralPostedRelatedtoSwaps
us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
afg:ShortdurationInsuranceContractsCumulativePercentagePaidofIncurredClaimsandAllocatedClaimAdjustmentExpenseNet
us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
afg:ShortdurationInsuranceContractsHistoricalClaimsDurationYearEightCumulative
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
afg:ShortdurationInsuranceContractsHistoricalClaimsDurationYearFiveCumulative
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
afg:ShortdurationInsuranceContractsHistoricalClaimsDurationYearFourCumulative
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
afg:ShortdurationInsuranceContractsHistoricalClaimsDurationYearNineCumulative
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
afg:ShortdurationInsuranceContractsHistoricalClaimsDurationYearSevenCumulative
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
afg:ShortdurationInsuranceContractsHistoricalClaimsDurationYearSixCumulative
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
afg:ShortdurationInsuranceContractsHistoricalClaimsDurationYearTenCumulative
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
afg:ShortdurationInsuranceContractsHistoricalClaimsDurationYearThreeCumulative
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
afg:ShortdurationInsuranceContractsHistoricalClaimsDurationYearTwoCumulative
us-gaap:StatementBusinessSegments, us-gaap:Subsegments

afg:UnfundedCommitmentsToLimitedPartnerships
us-gaap:ConsolidatedEntities
afg:UnfundedCommitmentsToLimitedPartnershipsPercentRelatedToSubsidiary

afg:VariableAnnuityAssetsFairValueDisclosure
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:ProductOrService
srt:LifeInsuranceInForceCeded
us-gaap:ProductOrService
srt:LifeInsuranceInForceGross
us-gaap:LossContingenciesByNatureOfContingency
us-gaap:AccrualForEnvironmentalLossContingencies

us-gaap:AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:StatementOperatingActivitiesSegment
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:StatementOperatingActivitiesSegment
us-gaap:ConsolidatedEntities
us-gaap:AdvancesFromFederalHomeLoanBanks

us-gaap:AssetsFairValueDisclosure
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:AssetsHeldByInsuranceRegulators

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:FinancialInstrument, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument
us-gaap:BalanceSheetLocation, us-gaap:FinancialInstrument, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:BalanceSheetLocation, us-gaap:FinancialInstrument, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecurities
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesAmortizedCost
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementBasis, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByMeasurementBasis
us-gaap:ConsolidatedEntities, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:CollateralAlreadyPostedAggregateFairValue

us-gaap:DebtInstrumentCarryingAmount
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType
us-gaap:BalanceSheetLocation, us-gaap:FinancialInstrument, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:InvestmentType
us-gaap:DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax
us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLoss
us-gaap:BalanceSheetLocation, us-gaap:FinancialInstrument, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSaleAmortizedCostAfterAllowanceForCreditLoss
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

us-gaap:DeferredFinanceCostsNet
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType

us-gaap:DeferredIncomeTaxLiabilities
afg:ComponentsOfDeferredTaxAssetsAndLiabilities
us-gaap:StatementBusinessSegments
us-gaap:DeferredPolicyAcquisitionCosts

us-gaap:DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired
afg:BalanceSheetImpactofNetUnrealizedGainsonSecurities, us-gaap:StatementBusinessSegments
us-gaap:ConsolidatedEntities
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:DeferredSalesInducementsNet

us-gaap:DeferredTaxAssetsCapitalLossCarryforwards
afg:ComponentsOfDeferredTaxAssetsAndLiabilities

us-gaap:DeferredTaxAssetsGross
afg:ComponentsOfDeferredTaxAssetsAndLiabilities

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsDomestic
afg:ComponentsOfDeferredTaxAssetsAndLiabilities

us-gaap:DeferredTaxAssetsOther
afg:ComponentsOfDeferredTaxAssetsAndLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits
afg:ComponentsOfDeferredTaxAssetsAndLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsPolicyholderLiabilities
afg:ComponentsOfDeferredTaxAssetsAndLiabilities

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost
afg:ComponentsOfDeferredTaxAssetsAndLiabilities

us-gaap:DeferredTaxLiabilitiesInvestments
afg:ComponentsOfDeferredTaxAssetsAndLiabilities

us-gaap:DerivativeAssets
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ConsolidatedEntities
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByAssetClass
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByAssetClass
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DerivativeCollateralRightToReclaimCash
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeNet
us-gaap:ConsolidatedEntities, us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeLiabilities
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:FairValueByLiabilityClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DerivativeInstrumentRisk
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass
us-gaap:FairValueByLiabilityClass
us-gaap:ConsolidatedEntities, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationConsideration
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherAssets
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherLiabilities
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EquityMethodInvestments
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:InvestmentType
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:FinancialInstrument
us-gaap:EquitySecuritiesFvNiCost

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
us-gaap:FairValueByAssetClass
us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
us-gaap:FairValueByLiabilityClass
us-gaap:FairValueByLiabilityClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ConsolidatedEntities
us-gaap:FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
us-gaap:ConsolidatedEntities, us-gaap:Range
us-gaap:FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresInterestRateAtPeriodEnd
us-gaap:ConsolidatedEntities
us-gaap:FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate
us-gaap:ConsolidatedEntities
us-gaap:FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate
us-gaap:ConsolidatedEntities
us-gaap:FederalHomeLoanBankStock

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:InvestmentsAndCash
us-gaap:ConsolidatedEntities
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:LiabilitiesFairValueDisclosure
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LiabilitiesForGuaranteesOnLongDurationContractsGuaranteedBenefitLiabilityGross

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:LossContingenciesByNatureOfContingency
us-gaap:LiabilityForAsbestosAndEnvironmentalClaimsGross

us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:StatementBusinessSegments

us-gaap:LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts
us-gaap:ConsolidatedEntities

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet
us-gaap:StatementBusinessSegments

us-gaap:LoansInsurancePolicy
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementBasis, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ConsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByMeasurementBasis
us-gaap:ConsolidatedEntities
us-gaap:MarketableSecurities
us-gaap:FinancialInstrument
us-gaap:MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure

us-gaap:MortgageLoansOnRealEstateCommercialAndConsumerNet
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementBasis, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ConsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByMeasurementBasis

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLossCarryforwards
afg:OperatingLossCarryForwardExpirationDates, us-gaap:IncomeTaxAuthority
afg:OperatingLossCarryForwardExpired
us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwardsValuationAllowance

us-gaap:OtherInvestments
us-gaap:ConsolidatedEntities

us-gaap:OtherLiabilities
us-gaap:ConsolidatedEntities
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ConsolidatedEntities, us-gaap:InvestmentType
us-gaap:OtherRealEstate

us-gaap:OtherReceivables

us-gaap:PremiumsReceivableAllowanceForDoubtfulAccounts
us-gaap:StatementBusinessSegments

us-gaap:PremiumsReceivableAtCarryingValue
us-gaap:ConsolidatedEntities
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:PrepaidReinsurancePremiums
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:ReinsurancePayable
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments
afg:Insurance, us-gaap:LossContingenciesByNatureOfContingency
us-gaap:StatementBusinessSegments

us-gaap:ReinsuranceRecoverablesAllowance
us-gaap:StatementBusinessSegments

us-gaap:ReinsuranceRecoverablesOnPaidAndUnpaidLosses
us-gaap:ConsolidatedEntities
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:StatementBusinessSegments

us-gaap:RetainedEarningsUnappropriated

us-gaap:SeparateAccountAssets
us-gaap:ConsolidatedEntities

us-gaap:SeparateAccountsLiability
us-gaap:ConsolidatedEntities
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet
us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearEight
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearFive
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearFour
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearNine
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearSeven
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearSix
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearTen
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearThree
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearTwo
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsIncurredButNotReportedIbnrClaimsLiabilityNet
us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet
us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:ShortdurationInsuranceContractsClaimDuration, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet
us-gaap:ShortdurationInsuranceContractsClaimDuration, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
afg:Insurance, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimAdjustmentExpenseOtherReconcilingItem
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense
us-gaap:Range
us-gaap:StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval
us-gaap:ProductOrService
us-gaap:StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance

us-gaap:SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts
us-gaap:StatementBusinessSegments

us-gaap:SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves
us-gaap:StatementBusinessSegments

us-gaap:SupplementaryInsuranceInformationUnearnedPremiums
us-gaap:StatementBusinessSegments

us-gaap:TradingSecuritiesDebt
us-gaap:BalanceSheetLocation, us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BalanceSheetLocation, us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ConsolidatedEntities
us-gaap:FairValueByAssetClass
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:UnearnedPremiums
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:StatementBusinessSegments
us-gaap:ValueOfBusinessAcquiredVOBA
us-gaap:ConsolidatedEntities
us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument
us-gaap:ConsolidatedEntities, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:StatementOperatingActivitiesSegment
us-gaap:ConsolidatedEntities, us-gaap:StatementOperatingActivitiesSegment

us-gaap:WorkersCompensationDiscountAmount

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Allocated Share Based Compensation Expense
Balance Sheet
Finite Lived Intangible Assets Net
Assets
Operating Lease Right Of Use Asset
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Finite Lived Intangible Assets Net
Liabilities
Operating Lease Liability
Noncurrent Liabilities
Long Term Debt
Stockholders Equity
Common Stock Value
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInInvestingActivities
Payments For Proceeds From Other Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
DividendsAndRepurchase
Payments For Repurchase Of Common Stock
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Net

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue ▁▁▁▂▂▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▃▃▃▂▂▃▂▃▄▅▆▆▇▇█85.085.086.087.089.090.090.090.090.090.089.089.089.089.088.088.088.088.087.087.087.087.087.087.088.088.088.088.090.090.090.089.089.090.089.091.095.097.098.099.0101.0103.0105.0NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▁▁▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▃▃▂▂▃▂▂▃▄▅▅▅▆▆▇▇██85.686.687.288.590.090.391.391.191.090.789.390.790.790.490.190.089.889.388.888.588.488.589.289.389.589.489.890.991.691.691.491.091.591.091.494.698.099.499.8101.3104.4106.2108.1109.5111.8113.1
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▁▁▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▂▂▂▂▂▂▂▂▂▂▂▂▂▃▄▄▄▅▆▆▇▇██85.085.986.688.289.790.390.290.089.789.489.389.189.088.688.288.187.887.286.986.986.886.987.487.587.787.687.989.089.689.689.489.189.689.489.892.996.497.798.299.7102.7104.6106.7108.2110.2112.0
us-gaap:EarningsPerShareBasic █▅▆▃▃▁▄▃▄▄▂▄▄▃▃▃▃▃▅▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▃▃▃▃▃▃▃▃▃▃11.784.887.991.861.98-3.342.331.642.343.68-0.332.32.361.641.880.131.641.764.431.250.631.161.480.721.60.221.441.31.181.151.770.941.231.340.552.431.021.161.110.960.530.81.241.220.980.94
us-gaap:EarningsPerShareDiluted █▅▆▃▃▁▄▃▄▄▂▄▄▃▃▃▃▃▅▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▃▃▃▃▃▃▃▃▃▃11.74.847.931.861.97-3.342.31.622.313.63-0.332.262.311.61.840.131.611.724.331.230.621.141.450.711.570.211.411.281.151.131.730.921.21.320.542.391.011.141.10.940.520.791.231.210.970.93
us-gaap:IncomeLossFromContinuingOperationsPerBasicShare ▁█2.83e-063.11e-06NANA1.26e-06-1.57e-06NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare ▁█2.81e-063.08e-06NANA1.26e-06-1.57e-06NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AllocatedShareBasedCompensationExpense ▁▃▃▃▂▃▄▃▄▄▄▄▄▃▄▄▄▇▄▄▄▅▅▃▄▄▄▂▄▄▄▆▄█▄▃▅▄▄▃▃▃▃▃▃2.05.05.05.04.05.06.05.06.06.06.06.06.05.06.07.06.011.07.07.06.08.09.05.07.06.07.04.07.07.06.010.07.013.06.05.09.06.06.05.05.05.05.05.05.0NA
us-gaap:BenefitsLossesAndExpenses ▃▃▇█▇▆██▆▆▇▇▆▅▅▇▅▄▅▅▅▄▄▆▄▃▄▅▃▂▃▄▂▂▄▄▂▂▂▃▂▁▂▂▁▁1243.01174.01739.01926.01733.01663.01871.01946.01701.01611.01729.01764.01573.01445.01541.01806.01441.01353.01420.01527.01445.01319.01416.01585.01315.01264.01339.01436.01262.01050.01116.01301.01013.0973.01266.01278.01014.0967.01042.01180.01024.0944.0980.01047.0894.0887.0
us-gaap:ComprehensiveIncomeNetOfTax ▅▅▇▅█▁▅▅▆▇▄▅▅▄▅▅▅▅▄▅▅▅▄▄▄▅▅▅▅▅▅▅▄▅▄▆▅▅▅▅▅▅225.0113.0740.0340.01198.0-1132.0157.0255.0575.0725.0-25.0101.052.0-142.0148.085.0261.0277.0-2.0193.0275.0245.0-28.0-39.0-72.068.0136.035.0228.0220.0148.054.0-160.0158.0-50.0385.0158.0247.0104.067.0143.0113.0NANANANA
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest NANA2.00.0-10.0-1.0-22.0-3.00.0-3.0-6.0-1.0-2.0-4.00.00.00.02.01.05.013.05.0-3.01.05.07.0-2.0-27.0-21.07.07.015.0-40.0-6.0-31.0-10.0-16.0-21.021.012.0-16.0-34.0NANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▅▅▇▅█▁▅▅▆▇▄▅▅▄▅▅▅▅▄▅▅▅▄▄▄▅▅▄▅▅▅▅▄▅▄▆▅▅▅▅▅▅▄▅▅▅225.0113.0742.0340.01188.0-1133.0135.0252.0575.0722.0-31.0100.050.0-146.0148.085.0261.0279.0-1.0198.0288.0250.0-31.0-38.0-67.075.0134.08.0207.0227.0155.069.0-200.0152.0-81.0375.0142.0226.0124.079.0127.073.0-24.0341.0207.0222.0
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▅▅█▄▄▁▅▄▅▅▃▄▅▄▅▃▄▄▅▄▄▄▄▄▄▃▄▄▄▄▄▄▄▄▃▅▄▄288.0335.0884.0134.0218.0-388.0259.0177.0259.0413.0-39.0244.0260.0174.0267.029.0205.0223.0317.0178.0136.0156.0210.099.0226.030.0190.0145.0130.0161.0246.0142.0126.0175.0-30.0285.0136.0146.0NANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest ▁█240.0267.0NANA103.0-144.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▄▅█▂▄▁▅▄▄▅▃▄▄▄▆▄▅▅▁▅▅▄▅▄▅▃▅▅▄▅▅▄▄▅▂▅▄▅▆▄▄▄▅▅▅▅48.068.0190.0-30.051.0-84.068.034.050.087.0-4.041.052.033.0101.018.060.068.0-71.065.073.052.080.033.077.05.065.054.047.054.081.044.049.062.0-49.074.052.058.0114.048.032.046.067.082.058.059.0
us-gaap:InterestExpense ▇███▇▃▃▃▃▂▂▁▂▁▅▆▇▆▆▄▄▃▃▃▄▅▅▃▃▃▃▃▃▃▆▆▆▆▆▆▆▆▆▆▃▃23.024.024.024.023.017.018.017.017.016.016.015.016.015.020.021.023.021.021.019.019.018.017.018.019.020.020.018.017.018.017.018.018.018.021.022.021.021.022.021.021.021.021.021.018.018.0
us-gaap:NetIncomeLoss █▅▆▃▄▁▄▃▄▄▂▄▄▃▄▃▃▃▅▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▃▃▃▃▃▃▃▃▃▃1002.0419.0692.0164.0177.0-301.0211.0147.0210.0329.0-29.0204.0210.0145.0166.011.0145.0153.0385.0109.054.0101.0129.063.0141.019.0127.0116.0106.0103.0158.083.0110.0120.050.0226.099.0113.0109.096.055.083.0133.0132.0108.0106.0
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest NANA2.00.0-10.0-3.0-20.0-4.0-1.0-3.0-6.0-1.0-2.0-4.00.00.00.02.03.04.09.03.01.03.08.06.0-2.0-25.0-23.04.07.015.0-33.0-7.0-31.0-15.0-15.0-25.018.011.0-18.0-34.0-24.0-6.0-8.0-18.0
us-gaap:NetInvestmentIncome ▁▁▇█▆▇███▇▇▇▇▆▆▆▆▅▅▅▅▅▅▅▅▅▅▄▅▄▄▄▄▄▄▄▄▃164.0188.0548.0572.0468.0544.0593.0588.0580.0542.0542.0527.0530.0495.0465.0471.0460.0435.0429.0433.0423.0411.0416.0425.0404.0388.0384.0377.0379.0361.0350.0338.0332.0326.0329.0326.0329.0317.0NANANANANANANANA
us-gaap:OperatingIncomeLoss ▅▅█▄▄▁▅▄▅▅▃▄▅▄▅▃▄▄▅▄▄▄▄▄▄▃▄▄▄▄▄▄▄▄▃▅▄▄▄▄▄▄▄▄▄▄288.0335.0884.0134.0218.0-388.0259.0177.0259.0413.0-39.0244.0260.0174.0267.029.0205.0223.0317.0178.0136.0156.0210.099.0226.030.0190.0145.0130.0161.0246.0142.0126.0175.0-30.0285.0136.0146.0241.0155.069.095.0176.0208.0158.0147.0
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax ▁█-27.0-14.0NANA3.027.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax us-gaap:StatementEquityComponents us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest-27.0NANANA3.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax NANA5.00.04.0-10.010.0-7.00.04.0-7.00.0-4.01.01.07.04.00.03.0-3.01.06.01.0-7.00.0-8.0-4.0-2.02.0-5.0-7.03.0-5.0-4.0-3.010.0-8.07.08.0-14.0-2.0NANANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▁▃▄▅█▁▄▅▆▆▄▄▄▃▄▄▅▅▃▄▅▅▄▄▃▄▄▄▅▅▄▄▃▄▄▅▄▅▄▄▅-777.0-306.048.0176.01021.0-829.0-56.0109.0366.0396.04.0-103.0-158.0-287.0-18.074.0116.0124.0-389.085.0225.0146.0-161.0-104.0-216.050.09.0-83.0124.0120.0-10.0-29.0-277.039.0-100.0164.058.0138.0-2.0-29.097.0NANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedForeignCurrencyAdjustmentAttributableToNoncontrollingInterestNANA0.00.00.0-2.02.0-1.0-1.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestNANA5.00.04.0-10.010.0-7.00.04.0-7.00.0-4.01.01.07.04.00.03.0-3.01.06.01.0-7.00.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterestNA-14.00.0-6.03.027.0-8.07.018.011.021.0-5.0-3.0-11.0-5.00.02.0-1.0-12.00.01.03.0-1.02.0-1.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesNA-14.00.0-6.03.027.0-8.07.018.011.021.0-5.0-3.0-11.0-5.00.02.0-1.0-12.00.01.03.0-1.02.0-1.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestNA-292.043.0182.01014.0-846.0-58.0108.0348.0381.0-10.0-98.0-151.0-277.0-15.067.0110.0125.0-379.088.0223.0136.0-161.0-100.0-215.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedNetUnrealizedInvestmentGainLossNA-292.043.0182.01014.0-846.0-58.0108.0348.0381.0-10.0-98.0-151.0-277.0-15.067.0110.0125.0-377.087.0219.0134.0-157.0-98.0-212.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncomeNA-306.048.0176.01021.0-831.0-54.0108.0365.0396.04.0-103.0-158.0-287.0-18.074.0116.0124.0-387.084.0221.0144.0-157.0-102.0-213.049.09.0-81.0122.0117.0-10.0-29.0-270.038.0-100.0159.059.0134.0-5.0-30.0NANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedTranslationAdjustmentNANA5.00.04.0-12.012.0-8.0-1.04.0-7.00.0-4.01.01.07.04.00.03.0-3.01.06.01.0-7.00.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AociAttributableToNoncontrollingInterestNANA0.00.00.0-2.02.0-1.0-1.00.00.00.00.00.00.00.00.00.02.0-1.0-4.0-2.04.02.03.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest▁▃▄▅█▁▄▅▆▆▄▄▄▃▄▄▅▅▃▄▅▅▄▄▃-777.0-306.048.0176.01021.0-829.0-56.0109.0366.0396.04.0-103.0-158.0-287.0-18.074.0116.0124.0-389.085.0225.0146.0-161.0-104.0-216.0NANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherIncome ▁▁▄▄▄▅▄▄▄▄▄▄▃▄▄▄▄▅▄▄▇▄▆▃█▄▂▂▂▁▂▁▂▁▄▄▄▃▃▄▄▃▃▅▄▃20.023.051.045.051.057.048.052.051.050.053.054.043.049.052.048.047.059.052.046.080.046.066.040.090.047.027.028.026.021.026.024.025.022.048.049.047.039.039.047.048.041.039.057.054.044.0
us-gaap:ProfitLoss █▅▆▄▄▁▄▃▄▄▂▄▄▃▄▃▃▃▅▃▃▃▃▃▃▃▃▃▃▃▄▃▃▃▃▄▃▃▃▃▃▃▃▃▃▃1002.0419.0694.0164.0167.0-304.0191.0143.0209.0326.0-35.0203.0208.0141.0166.011.0145.0155.0388.0113.063.0104.0130.066.0149.025.0125.091.083.0107.0165.098.077.0113.019.0211.084.088.0127.0107.037.049.0109.0126.0100.088.0
us-gaap:RealizedInvestmentGainsLosses █▄▆▄▄▁▄▃▄▄▂▄▄▃▄▃▄▄▄▄▄▃▃▃▄▃▄▄▄▄▄▄▄▄▄▅▄▄▄▄▄▃▄▄▄▄983.0158.0645.014.0204.0-550.065.0-18.057.0184.0-237.036.029.0-93.05.0-10.011.017.055.03.018.0-15.0-10.0-9.052.0-133.010.016.013.019.068.057.047.058.068.0242.013.044.051.07.019.0-3.035.042.011.04.0
us-gaap:Revenues ▃▃█▆▅▂▆▆▅▅▄▅▅▄▄▅▄▃▄▄▃▃▄▄▃▂▃▃▃▂▂▃▁▂▂▃▂▁▂▂▁▁▂▂▁▁1531.01509.02623.02060.01951.01275.02130.02123.01960.02024.01690.02008.01833.01619.01808.01835.01646.01576.01737.01705.01581.01475.01626.01684.01541.01294.01529.01581.01392.01211.01362.01443.01139.01148.01236.01563.01150.01113.01283.01335.01093.01039.01156.01255.01052.01034.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets ▁███▇▇▇▇▇▇▆▆▆▆▆▆▆▅▅▅▅▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▂▂▂▂▂▂▂28780.074197.073566.073110.070867.067643.070130.069067.067697.066132.063456.064190.061834.060656.060658.060163.058618.057464.055072.054845.052733.051038.049859.050557.049424.048307.047535.046552.045355.042770.042087.040947.039414.039139.039171.039633.037052.036211.036042.035130.034053.032948.032454.0NANANA
us-gaap:Liabilities ▁████▇▇▇▇▇▇▇▆▆▆▆▆▆▅▅▅▅▄▅▄▄▄▄▄▃▃▃▃▃▃▃▂▂▂▂▂▂▂23179.067512.066777.066770.064741.062596.063861.062746.061607.060467.058484.059026.056750.055473.055324.054784.053306.052269.050153.049487.047540.046101.045089.045651.044440.043207.042481.041474.040197.037797.037318.036237.034776.034231.034423.034669.032277.031479.031351.030510.029428.028336.027834.0NANANA
us-gaap:LiabilitiesAndStockholdersEquity ▁███▇▇▇▇▇▇▆▆▆▆▆▆▆▅▅▅▅▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▂▂▂▂▂▂▂28780.074197.073566.073110.070867.067643.070130.069067.067697.066132.063456.064190.061834.060656.060658.060163.058618.057464.055072.054845.052733.051038.049859.050557.049424.048307.047535.046552.045355.042770.042087.040947.039414.039139.039171.039633.037052.036211.036042.035130.034053.032948.032454.0NANANA
us-gaap:StockholdersEquity ▄██▇▆▃▆▇▆▅▃▃▃▃▄▄▄▃▂▃▃▂▁▂▂▂▂▂▃▂▁▁▁▂▁▂▁▁▁▁▁▁▁5601.06685.06789.06340.06126.05047.06269.06321.06090.05665.04970.05164.05084.05183.05330.05379.05312.05191.04916.05161.05000.04755.04592.04724.04802.04923.04879.04904.04985.04796.04599.04542.04473.04733.04578.04779.04622.04580.04545.04465.04472.04463.04470.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CashAndCashEquivalentsAtCarryingValue ▇▃▆█▅▃▄▅▅▄▃▄▃▃▅▅▄▃▄▃▃▂▂▁▂▂▂▂▄▃▃▂▂▃▃▃▃▂▂▁▃▂▂▂▁▂3365.01691.02810.03747.02698.01673.02314.02693.02374.02000.01515.02009.01810.01659.02338.02349.02207.01890.02107.01639.01548.01231.01220.0894.01216.01212.01343.01310.02116.01876.01639.01331.01271.01529.01705.01626.01523.01422.01324.0991.01629.01499.01099.01140.01011.01170.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AmortizationOfIntangibleAssets ▁▄▄▄▄▄▂▄▄▄▂▄▂▂▂▂▂▂▂▂▂▂▂▂▂▂▇█▇▄▅▄▄▅▅▄▄▅▄▄▄1.03.03.03.03.03.02.03.03.03.02.03.02.02.02.02.02.02.02.02.02.02.02.02.02.02.05.06.05.03.04.03.03.04.04.03.03.04.03.03.03.0NANANANANA
us-gaap:Goodwill ▁▁█████████▆▆▆▆▆▆▆▆▆▆▆▆▇▇▇▇▇▆▃▃▃▃▃▃▃▃▃▃▃▃▃▃176.0176.0207.0207.0207.0207.0207.0207.0207.0207.0207.0199.0199.0199.0199.0199.0199.0199.0199.0199.0199.0199.0199.0201.0201.0201.0201.0201.0200.0185.0185.0185.0185.0185.0185.0185.0186.0186.0186.0186.0186.0186.0186.0NANANA
us-gaap:FiniteLivedIntangibleAssetsNet ▄▄▄▄▅▅▆▆▆▇▇▄▄▄▃▃▄▄▄▄▅▅▅▆▆▆▇██▂▁▂▂▃▃▄▄▅▅▅▆30.031.034.034.037.040.043.045.048.051.054.031.034.036.026.029.030.032.034.036.038.039.041.043.045.047.049.055.058.019.014.018.021.025.028.032.035.038.041.040.043.0NA49.0NANANA
us-gaap:DeferredTaxAssetsLiabilitiesNet NANA43.0NANANA174.0NANANA365.0NANANA147.0NANANA388.0NANANA229.0NANANA-25.0NANANA-32.0NANANA-251.0NANANA-203.0NANANA-116.0NANANA
 us-gaap:DeferredTaxAssetsLiabilitiesNet afg:ComponentsOfDeferredTaxAssetsAndLiabilities afg:ExcludingUnrealizedGainsNANA377.0NANANA403.0NANANA387.0NANANA370.0NANANA606.0NANANA410.0NANANA382.0NANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▂▃▆▇▇▇▇▇█124.0133.0139.0154.0163.0162.0158.0162.0162.0167.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:EquitySecuritiesFvNi ▁▁▆▅▅▅████▇▇965.0944.01663.01606.01602.01559.01937.02004.01985.01930.01814.01827.0NANA1662.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LongTermDebt ▇▇▇█▇▄▄▄▄▄▃▃▃▃▃▃▄▃▃▃▂▂▂▁▂▂▂▂▁▁▁▁▁▁▁▁▃▁▁▁▁▁▁1963.01963.01963.02108.01912.01473.01473.01423.01423.01423.01302.01302.01301.01301.01301.01284.01405.01283.01283.01300.0998.0998.01020.0880.01024.01061.01061.01062.0912.0913.0913.0913.0949.0950.0953.0966.01158.0931.0934.0937.0940.0949.0952.0NANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA35.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA29.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA23.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA20.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA28.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity ▄██▇▆▃▆▇▆▅▃▃▃▃▄▄▄▃▂▃▃▂▁▂▂▂▂▂▃▂▁▁▁▂▁▂▁▁▁▁▁▁▁5601.06685.06789.06340.06126.05047.06269.06321.06090.05665.04970.05164.05084.05183.05330.05379.05312.05191.04916.05161.05000.04755.04592.04724.04802.04923.04879.04904.04985.04796.04599.04542.04473.04733.04578.04779.04622.04580.04545.04465.04472.04463.04470.0NANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ▅██▇▆▃▇▇▆▅▃▃▃▃▄▄▄▃▃▄▃▃▂▃▃▃▃▃▃▃▂▂▂▃▂▃▂▂▂▂▂▂▂▂▁▁5601.06685.06789.06340.06126.05047.06269.06321.06090.05665.04972.05164.05084.05183.05331.05379.05312.05195.04919.05358.05193.04937.04770.04906.04984.05100.05054.05078.05158.04973.04769.04710.04638.04908.04748.04964.04775.04732.04691.04620.04625.04612.04620.04745.04447.04323.0
us-gaap:CommonStockValue ▁▁▁▂▂▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▃▃▃▂▂▃▂▃▄▅▆▆▇▇█85.085.086.087.089.090.090.090.090.090.089.089.089.089.088.088.088.088.087.087.087.087.087.087.088.088.088.088.090.090.090.089.089.090.089.091.095.097.098.099.0101.0103.0105.0NANANA
us-gaap:AdditionalPaidInCapitalCommonStock █▇▇▇████▇▆▆▆▅▅▄▄▄▃▂▆▆▅▅▅▄▄▄▃▄▃▃▂▂▂▁▁▂▃▃▂▃▄▄1303.01279.01281.01283.01299.01309.01307.01292.01277.01256.01245.01231.01220.01205.01181.01167.01158.01138.01111.01242.01228.01218.01214.01195.01183.01173.01152.01150.01152.01138.01123.01109.01088.01090.01063.01071.01112.01126.01121.01114.01138.01159.01166.0NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▂▆██▇▁▆▆▅▃▁▁▂▃▅▅▄▄▃▅▅▃▃▃▄▅▅▅▅▅▄▄▄▆▆▆▅▅▄▄▄▄▄▄▃190.0967.01273.01233.01053.032.0863.0917.0809.0444.048.044.0147.0305.0813.0689.0615.0499.0375.0753.0669.0448.0304.0461.0563.0776.0727.0718.0799.0677.0560.0570.0599.0869.0831.0931.0773.0714.0557.0563.0579.0503.0479.0607.0398.0NA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▁▄▄▄▃▆▆▄▆▆▆▆▆▄▆▄▄█▇▄▄▄▇▃▄▄▄▄▃▄▃▇▃▃▂▂█▃▃▂▃▂▂▂▂▂2.05.05.05.04.06.06.05.06.06.06.06.06.05.06.05.05.08.07.05.05.05.07.04.05.05.05.05.04.05.04.07.04.04.03.03.08.04.04.03.04.03.03.03.03.03.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▇▅▆▆▆██▅▅█▅▅▅█▅▇▁▅▄▂▄▅▄▃▅▆▃▄▃▅▃▃▂▄▄▃▂▂▃▃▅▂▄▂▅343.0627.0487.0609.0555.0532.0765.0814.0423.0454.0806.0454.0432.0391.0811.0419.0650.0-76.0477.0247.091.0335.0450.0331.0179.0397.0548.0175.0295.0204.0372.0192.0137.059.0330.0261.0216.010.06.0127.0145.0389.083.0320.068.0393.0
us-gaap:NetCashProvidedByUsedInInvestingActivities █▃▃▆▆▂▂▃▄▄▁▃▃▂▃▄▃▃▄▃▄▃▃▂▃▃▃▂▄▄▃▃▃▄▄▅▄▅▄▃▄▄▄▄▄▄1599.0-938.0-792.0524.0357.0-1653.0-1287.0-726.0-368.0-684.0-1975.0-890.0-829.0-1656.0-1062.0-236.0-800.0-1194.0-535.0-699.0-551.0-1196.0-1162.0-1301.0-1146.0-968.0-1184.0-1465.0-544.0-426.0-1002.0-721.0-722.0-470.0-487.0-112.0-643.0-183.0-508.0-1190.0-484.0-257.0-331.0-667.0-404.0-303.0
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▄▂▄▅▆▅▅▅▇▇▇▆▆▅▄▆█▆▆▇▇█▇█▆▇▆▆▆█▆▅▅▅▄▆▅▇▆▆▅▅▆▅▄-904.0-172.0-632.0-84.0113.0480.0143.0231.0319.0715.0675.0635.0548.0586.0240.0-41.0467.01053.0526.0543.0777.0872.01038.0648.0971.0440.0669.0484.0489.0459.0938.0589.0327.0235.0236.0-46.0528.0271.0835.0425.0469.0268.0207.0476.0177.0-40.0
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect █▃▁██▂▃▅▆▆1038.0-483.0-937.01049.01025.0-641.0-379.0319.0374.0485.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▇▅▆▆▆██▅▅█▅▅▅█▅▇▁▅▄▂▄▅▄▃▅▆▃▄▃▅▃▃▂▄▄▃▂▂▃▃▅▂▄▂▅343.0627.0487.0609.0555.0532.0765.0814.0423.0454.0806.0454.0432.0391.0811.0419.0650.0-76.0477.0247.091.0335.0450.0331.0179.0397.0548.0175.0295.0204.0372.0192.0137.059.0330.0261.0216.010.06.0127.0145.0389.083.0320.068.0393.0
us-gaap:NetIncomeLoss █▅▆▃▄▁▄▃▄▄▂▄▄▃▄▃▃▃▅▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▃▃▃▃▃▃▃▃▃▃1002.0419.0692.0164.0177.0-301.0211.0147.0210.0329.0-29.0204.0210.0145.0166.011.0145.0153.0385.0109.054.0101.0129.063.0141.019.0127.0116.0106.0103.0158.083.0110.0120.050.0226.099.0113.0109.096.055.083.0133.0132.0108.0106.0
us-gaap:ProfitLoss █▅▆▄▄▁▄▃▄▄▂▄▄▃▄▃▃▃▅▃▃▃▃▃▃▃▃▃▃▃▄▃▃▃▃▄▃▃▃▃▃▃▃▃▃▃1002.0419.0694.0164.0167.0-304.0191.0143.0209.0326.0-35.0203.0208.0141.0166.011.0145.0155.0388.0113.063.0104.0130.066.0149.025.0125.091.083.0107.0165.098.077.0113.019.0211.084.088.0127.0107.037.049.0109.0126.0100.088.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities █▃▃▆▆▂▂▃▄▄▁▃▃▂▃▄▃▃▄▃▄▃▃▂▃▃▃▂▄▄▃▃▃▄▄▅▄▅▄▃▄▄▄▄▄▄1599.0-938.0-792.0524.0357.0-1653.0-1287.0-726.0-368.0-684.0-1975.0-890.0-829.0-1656.0-1062.0-236.0-800.0-1194.0-535.0-699.0-551.0-1196.0-1162.0-1301.0-1146.0-968.0-1184.0-1465.0-544.0-426.0-1002.0-721.0-722.0-470.0-487.0-112.0-643.0-183.0-508.0-1190.0-484.0-257.0-331.0-667.0-404.0-303.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▄▂▄▅▆▅▅▅▇▇▇▆▆▅▄▆█▆▆▇▇█▇█▆▇▆▆▆█▆▅▅▅▄▆▅▇▆▆▅▅▆▅▄-904.0-172.0-632.0-84.0113.0480.0143.0231.0319.0715.0675.0635.0548.0586.0240.0-41.0467.01053.0526.0543.0777.0872.01038.0648.0971.0440.0669.0484.0489.0459.0938.0589.0327.0235.0236.0-46.0528.0271.0835.0425.0469.0268.0207.0476.0177.0-40.0
us-gaap:ProceedsFromIssuanceOfLongTermDebt NANA-1.0196.0439.00.0194.00.00.0121.00.00.00.00.0367.00.0NANA0.0302.0NANA145.0NANANA0.0NANANA0.00.0NANA28.0121.0NANA0.00.0NANA1.0128.0NANA
us-gaap:PaymentsOfDividendsCommonStock █▁▂▁▁▁▂▁▂▁▂▁▂▁▂▁▂▁▂▁▁▁▂▁▁▁▂▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1228.043.0215.038.041.040.0203.036.0169.036.0169.031.0163.031.0205.027.0158.027.0113.024.024.024.0111.021.022.022.0108.020.020.019.0108.018.017.017.040.017.016.017.017.016.018.016.017.015.016.015.0
us-gaap:PaymentsForRepurchaseOfCommonStock ▄█▂▃▂▁114.0192.080.096.076.061.0NANA0.00.0NANANANA0.00.00.00.09.026.022.076.013.035.047.031.064.083.020.024.00.00.067.03.0100.0162.097.056.052.085.094.084.091.050.076.075.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value85858687899090909090898989898888888887878787878788888888909090898990899195979899101103105113
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.30.30.30.30.30.4

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value858687889090919191908990909090908989888888888989898989909191919191919194989999101104106108109111113
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value85858688899090908989898989888888878786868686878787878789898989898989899296979899102104106108110112
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value11.784.887.991.861.98-3.342.331.642.343.68-0.332.32.361.641.880.131.641.764.431.250.631.161.480.721.60.221.441.31.181.151.770.941.231.340.552.431.021.161.110.960.530.81.241.220.980.94
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value11.74.847.931.861.97-3.342.31.622.313.63-0.332.262.311.61.840.131.611.724.331.230.621.141.450.711.570.211.411.281.151.131.730.921.21.320.542.391.011.141.10.940.520.791.231.210.970.93
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Basic Share

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value2.833.111.26-1.57
Percentage of IncomeLossFromContinuingOperationsPerBasicShare100.0100.0100.0100.0

Income Loss From Continuing Operations Per Diluted Share

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value2.813.081.26-1.57
Percentage of IncomeLossFromContinuingOperationsPerDilutedShare100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2.05.05.05.04.05.06.05.06.06.06.06.06.05.06.07.06.0117.07.06.08.09.05.07.06.07.04.07.07.06.010.07.0136.05.09.06.06.05.05.05.05.05.05.0
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.10.30.20.20.20.40.30.20.30.30.40.30.30.30.30.40.40.70.40.40.40.50.60.30.50.50.50.30.50.60.40.70.61.10.50.30.80.50.50.40.50.50.40.40.5

Benefits Losses And Expenses

us-gaap:BenefitsLossesAndExpenses

us-gaap:BenefitsLossesAndExpenses


Benefits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1243117417391926173316631871194617011611172917641573144515411806144113531420152714451319141615851315126413391436126210501116130110139731266127810149671042118010249449801047894887
Percentage of BenefitsLossesAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues81.277.866.393.588.8130.487.891.786.879.6102.387.885.889.385.298.487.585.981.889.691.489.487.194.185.397.787.690.890.786.781.990.288.984.8102.481.888.286.981.288.493.790.984.883.485.085.8

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value2251137403401198-1132.0157255575725-25.010152-142.014885261277-2.0193275245-28.0-39.0-72.0681363522822014854-160.0158-50.038515824710467143113
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues14.77.528.216.561.4-88.87.412.029.335.8-1.55.02.8-8.88.24.615.917.6-0.111.317.416.6-1.7-2.3-4.75.38.92.216.418.210.93.7-14.013.8-4.024.613.722.28.15.013.110.9

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest


Comprehensive
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value2.00.0-10.0-1.0-22.0-3.00.0-3.0-6.0-1.0-2.0-4.00.00.00.02.01.05.0135.0-3.01.05.07.0-2.0-27.0-21.07.07.015-40.0-6.0-31.0-10.0-16.0-21.02112-16.0-34.0
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.10.0-0.5-0.1-1.0-0.10.0-0.1-0.4-0.0-0.1-0.20.00.00.00.10.10.30.80.3-0.20.10.30.5-0.1-1.7-1.50.60.51.0-3.5-0.5-2.5-0.6-1.4-1.91.60.9-1.5-3.3

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2251137423401188-1133.0135252575722-31.010050-146.014885261279-1.0198288250-31.0-38.0-67.0751348.020722715569-200.0152-81.03751422261247912773-24.0341207222
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues14.77.528.316.560.9-88.96.311.929.335.7-1.85.02.7-9.08.24.615.917.7-0.111.618.216.9-1.9-2.3-4.35.88.80.514.918.711.44.8-17.613.2-6.624.012.320.39.75.911.67.0-2.127.219.721.5

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value288335884134218-388.0259177259413-39.0244260174267292052233171781361562109922630190145130161246142126175-30.0285136146
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues18.822.233.76.511.2-30.412.28.313.220.4-2.312.214.210.714.81.612.514.118.210.48.610.612.95.914.72.312.49.29.313.318.19.811.115.2-2.418.211.813.1

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value240267103-144.0
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0
Percentage of Revenues15.717.75.3-11.3

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value4868190-30.051-84.068345087-4.0415233101186068-71.06573528033775.06554475481444962-49.074525811448324667825859
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.14.57.2-1.52.6-6.63.21.62.64.3-0.22.02.82.05.61.03.64.3-4.13.84.63.54.92.05.00.44.33.43.44.55.93.04.35.4-4.04.74.55.28.93.62.94.45.86.55.55.7

us-gaap:IncomeTaxExpenseBenefit us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:NeonCapitalLimited


Income
Period End2020-09-30
Value-73.0
Percentage of IncomeTaxExpenseBenefit243.3
Percentage of Revenues-3.5
Percentage of Revenues afg:NeonCapitalLimited0.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value23242424231718171716161516152021232121191918171819202018171817181818212221212221212121211818
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.51.60.91.21.21.30.80.80.90.80.90.70.90.91.11.11.41.31.21.11.21.21.01.11.21.51.31.11.21.51.21.21.61.61.71.41.81.91.71.61.92.01.81.71.71.7

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1002419692164177-301.0211147210329-29.020421014516611145153385109541011296314119127116106103158831101205022699113109965583133132108106
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues65.427.826.48.09.1-23.69.96.910.716.3-1.710.211.59.09.20.68.89.722.26.43.46.87.93.79.11.58.37.37.68.511.65.89.710.54.014.58.610.28.57.25.08.011.510.510.310.3

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:Parent


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1002419692164177-301.0211147210329-29.020421014516611145153
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues65.427.826.48.09.1-23.69.96.910.716.3-1.710.211.59.09.20.68.89.7
Percentage of Revenues us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1002419692164177-301.0211147210329-29.020421014516611145153
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues65.427.826.48.09.1-23.69.96.910.716.3-1.710.211.59.09.20.68.89.7
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2.00.0-10.0-3.0-20.0-4.0-1.0-3.0-6.0-1.0-2.0-4.00.00.00.02.03.04.09.03.01.03.08.06.0-2.0-25.0-23.04.07.015-33.0-7.0-31.0-15.0-15.0-25.01811-18.0-34.0-24.0-6.0-8.0-18.0
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.10.0-0.5-0.2-0.9-0.2-0.1-0.1-0.4-0.0-0.1-0.20.00.00.00.10.20.20.60.20.10.20.50.5-0.1-1.6-1.70.30.51.0-2.9-0.6-2.5-1.0-1.3-2.21.40.8-1.6-3.3-2.1-0.5-0.8-1.7

Net Investment Income

us-gaap:NetInvestmentIncome

us-gaap:NetInvestmentIncome


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value164188548572468544593588580542542527530495465471460435429433423411416425404388384377379361350338332326329326329317
Percentage of NetInvestmentIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues10.712.520.927.824.042.727.827.729.626.832.126.228.930.625.725.727.927.624.725.426.827.925.625.226.230.025.123.827.229.825.723.429.128.426.620.928.628.5

us-gaap:NetInvestmentIncome us-gaap:ConsolidatedEntities

afg:NeonCapitalLimited


Net
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.01.00.0-6.0
Percentage of NetInvestmentIncome0.00.20.0-1.1
Percentage of Revenues0.00.00.0-0.5
Percentage of Revenues afg:NeonCapitalLimited0.00.00.00.0

us-gaap:NetInvestmentIncome us-gaap:ConsolidatedEntities, us-gaap:StatementBusinessSegments, us-gaap:Subsegments

afg:NeonCapitalLimited, afg:PropertyAndCasualtyInsurance, afg:OtherLines


Net
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.01.00.0-6.0
Percentage of NetInvestmentIncome0.00.20.0-1.1
Percentage of Revenues0.00.00.0-0.5
Percentage of Revenues afg:NeonCapitalLimited afg:PropertyAndCasualtyInsurance afg:OtherLines0.00.00.00.0

us-gaap:NetInvestmentIncome us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:AnnuitySubsidiaries


Net
Period End2021-03-312020-03-31
Value447415
Percentage of NetInvestmentIncome237.876.3
Percentage of Revenues29.632.5
Percentage of Revenues afg:AnnuitySubsidiaries0.00.0

afg:NeonCapitalLimited


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.01.00.0-6.01.02.0
Percentage of NetInvestmentIncome0.00.20.0-1.10.20.3
Percentage of Revenues0.00.00.0-0.50.00.1
Percentage of Revenues afg:NeonCapitalLimited0.00.00.00.00.00.0

us-gaap:NetInvestmentIncome us-gaap:InvestmentType

afg:AlternativeInvestments


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value8361-52.03348574926
Percentage of NetInvestmentIncome15.110.7-11.16.18.19.78.44.8
Percentage of Revenues3.23.0-2.72.62.32.72.51.3
Percentage of Revenues afg:AlternativeInvestments0.00.00.00.00.00.00.00.0

afg:ExcludingAlternativeInvestments


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value465511520511545531531516
Percentage of NetInvestmentIncome84.989.3111.193.991.990.391.695.2
Percentage of Revenues17.724.826.740.125.625.027.125.5
Percentage of Revenues afg:ExcludingAlternativeInvestments0.00.00.00.00.00.00.00.0

us-gaap:NetInvestmentIncome us-gaap:InvestmentType, us-gaap:StatementOperatingActivitiesSegment

us-gaap:RealEstateFunds, us-gaap:SegmentContinuingOperations


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value22297.012
Percentage of NetInvestmentIncome13.415.41.52.2
Percentage of Revenues1.41.90.40.9
Percentage of Revenues us-gaap:RealEstateFunds us-gaap:SegmentContinuingOperations0.00.00.00.0

us-gaap:NetInvestmentIncome us-gaap:StatementBusinessSegments

afg:Annuity


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value429464384422458448451435419413412394376375360347346351344315309317306292285287289275270259257248254249245228
Percentage of NetInvestmentIncome78.381.182.177.677.276.277.880.377.378.477.779.680.979.678.379.880.781.181.376.674.374.675.775.374.276.176.376.277.176.677.476.177.276.474.571.9
Percentage of Revenues16.422.519.733.121.521.123.021.524.820.622.524.320.820.421.922.019.920.621.821.419.018.819.922.618.618.220.822.719.817.922.621.620.615.921.320.5
Percentage of Revenues afg:Annuity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

afg:PropertyAndCasualtyInsurance


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1431591221127293120124124104115108115100869496868593898374838379757676676765656669676970
Percentage of NetInvestmentIncome87.284.622.319.615.417.120.221.121.419.221.220.521.720.218.520.020.919.819.821.521.020.217.819.520.520.419.520.220.118.619.119.219.620.221.020.621.022.1
Percentage of Revenues9.310.54.75.43.77.35.65.86.35.16.85.46.36.24.85.15.85.54.95.55.65.64.64.95.46.14.94.85.55.54.94.55.75.75.64.36.06.3
Percentage of Revenues afg:PropertyAndCasualtyInsurance0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.06.99.39.7

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value288335884134218-388.0259177259413-39.0244260174267292052233171781361562109922630190145130161246142126175-30.02851361462411556995176208158147
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues18.822.233.76.511.2-30.412.28.313.220.4-2.312.214.210.714.81.612.514.118.210.48.610.612.95.914.72.312.49.29.313.318.19.811.115.2-2.418.211.813.118.811.66.39.115.216.615.014.2

Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value-27.0-14.03.027
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0100.0100.0
Percentage of Revenues-1.8-0.90.22.1

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax us-gaap:StatementEquityComponents

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302020-06-30
Value-27.03.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0
Percentage of Revenues-1.80.2
Percentage of Revenues us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest0.00.0

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value5.00.04.0-10.010.0-7.00.04.0-7.00.0-4.01.01.07.04.00.03.0-3.01.06.01.0-7.00.0-8.0-4.0-2.02.0-5.0-7.03.0-5.0-4.0-3.010.0-8.07.08.0-14.0-2.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.00.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.20.00.2-0.80.5-0.30.00.2-0.40.0-0.20.10.10.40.20.00.2-0.20.10.40.1-0.40.0-0.6-0.3-0.10.1-0.4-0.50.2-0.4-0.3-0.20.6-0.70.60.6-1.0-0.2

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-777.0-306.0481761021-829.0-56.01093663964.0-103.0-158.0-287.0-18.074116124-389.085225146-161.0-104.0-216.0509.0-83.0124120-10.0-29.0-277.039-100.016458138-2.0-29.097
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-50.8-20.31.88.552.3-65.0-2.65.118.719.60.2-5.1-8.6-17.7-1.04.07.07.9-22.45.014.29.9-9.9-6.2-14.03.90.6-5.28.99.9-0.7-2.0-24.33.4-8.110.55.012.4-0.2-2.28.9

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedForeignCurrencyAdjustmentAttributableToNoncontrollingInterest


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value0.00.00.0-2.02.0-1.0-1.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of OtherComprehensiveIncomeLossNetOfTax0.00.00.00.2-3.6-0.9-0.30.00.0-0.0-0.0-0.0-0.00.00.00.0-0.00.00.00.0-0.0-0.0-0.0
Percentage of Revenues0.00.00.0-0.20.1-0.0-0.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:AccumulatedForeignCurrencyAdjustmentAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value5.00.04.0-10.010.0-7.00.04.0-7.00.0-4.01.01.07.04.00.03.0-3.01.06.01.0-7.00.0
Percentage of OtherComprehensiveIncomeLossNetOfTax10.40.00.41.2-17.9-6.40.01.0-175.0-0.02.5-0.3-5.69.53.40.0-0.8-3.50.44.1-0.66.7-0.0
Percentage of Revenues0.20.00.2-0.80.5-0.30.00.2-0.40.0-0.20.10.10.40.20.00.2-0.20.10.40.1-0.40.0
Percentage of Revenues us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-14.00.0-6.03.027-8.07.0181121-5.0-3.0-11.0-5.00.02.0-1.0-12.00.01.03.0-1.02.0-1.0
Percentage of OtherComprehensiveIncomeLossNetOfTax4.60.0-3.40.3-3.314.36.44.92.8525.04.91.93.827.80.01.7-0.83.10.00.42.10.6-1.90.5
Percentage of Revenues-0.90.0-0.30.22.1-0.40.30.90.51.2-0.2-0.2-0.7-0.30.00.1-0.1-0.70.00.10.2-0.10.1-0.1
Percentage of Revenues us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-14.00.0-6.03.027-8.07.0181121-5.0-3.0-11.0-5.00.02.0-1.0-12.00.01.03.0-1.02.0-1.0
Percentage of OtherComprehensiveIncomeLossNetOfTax4.60.0-3.40.3-3.314.36.44.92.8525.04.91.93.827.80.01.7-0.83.10.00.42.10.6-1.90.5
Percentage of Revenues-0.90.0-0.30.22.1-0.40.30.90.51.2-0.2-0.2-0.7-0.30.00.1-0.1-0.70.00.10.2-0.10.1-0.1
Percentage of Revenues us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-292.0431821014-846.0-58.0108348381-10.0-98.0-151.0-277.0-15.067110125-379.088223136-161.0-100.0-215.0
Percentage of OtherComprehensiveIncomeLossNetOfTax95.489.6103.499.3102.1103.699.195.196.2-250.095.195.696.583.390.594.8100.897.4103.599.193.2100.096.299.5
Percentage of Revenues-19.41.68.852.0-66.4-2.75.117.818.8-0.6-4.9-8.2-17.1-0.83.76.77.9-21.85.214.19.2-9.9-5.9-14.0
Percentage of Revenues us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-292.0431821014-846.0-58.0108348381-10.0-98.0-151.0-277.0-15.067110125-377.087219134-157.0-98.0-212.0
Percentage of OtherComprehensiveIncomeLossNetOfTax95.489.6103.499.3102.1103.699.195.196.2-250.095.195.696.583.390.594.8100.896.9102.497.391.897.594.298.1
Percentage of Revenues-19.41.68.852.0-66.4-2.75.117.818.8-0.6-4.9-8.2-17.1-0.83.76.77.9-21.75.113.99.1-9.7-5.8-13.8
Percentage of Revenues us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value-306.0481761021-831.0-54.01083653964.0-103.0-158.0-287.0-18.074116124-387.084221144-157.0-102.0-213.0499.0-81.0122117-10.0-29.0-270.038-100.015959134-5.0-30.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.296.499.199.7100.0100.0100.0100.0100.0100.0100.0100.0100.099.598.898.298.697.598.198.698.0100.097.698.497.5100.0100.097.597.4100.097.0101.797.1250.0103.4
Percentage of Revenues-20.31.88.552.3-65.2-2.55.118.619.60.2-5.1-8.6-17.7-1.04.07.07.9-22.34.914.09.8-9.7-6.1-13.83.80.6-5.18.89.7-0.7-2.0-23.73.3-8.110.25.112.0-0.4-2.2
Percentage of Revenues us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value5.00.04.0-12.012-8.0-1.04.0-7.00.0-4.01.01.07.04.00.03.0-3.01.06.01.0-7.00.0
Percentage of OtherComprehensiveIncomeLossNetOfTax10.40.00.41.4-21.4-7.3-0.31.0-175.0-0.02.5-0.3-5.69.53.40.0-0.8-3.50.44.1-0.66.7-0.0
Percentage of Revenues0.20.00.2-0.90.6-0.4-0.10.2-0.40.0-0.20.10.10.40.20.00.2-0.20.10.40.1-0.40.0
Percentage of Revenues us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AociAttributableToNoncontrollingInterest


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value0.00.00.0-2.02.0-1.0-1.00.00.00.00.00.00.00.00.00.02.0-1.0-4.0-2.04.02.03.0
Percentage of OtherComprehensiveIncomeLossNetOfTax0.00.00.00.2-3.6-0.9-0.30.00.0-0.0-0.0-0.0-0.00.00.00.0-0.5-1.2-1.8-1.4-2.5-1.9-1.4
Percentage of Revenues0.00.00.0-0.20.1-0.0-0.10.00.00.00.00.00.00.00.00.00.1-0.1-0.3-0.10.20.10.2
Percentage of Revenues us-gaap:AociAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-777.0-306.0481761021-829.0-56.01093663964.0-103.0-158.0-287.0-18.074116124-389.085225146-161.0-104.0-216.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-50.8-20.31.88.552.3-65.0-2.65.118.719.60.2-5.1-8.6-17.7-1.04.07.07.9-22.45.014.29.9-9.9-6.2-14.0
Percentage of Revenues us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Income

us-gaap:OtherIncome

us-gaap:OtherIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value20235145515748525150535443495248475952468046664090472728262126242522484947393947484139575444
Percentage of OtherIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.31.51.92.22.64.52.32.42.62.53.12.72.33.02.92.62.93.73.02.75.13.14.12.45.83.61.81.81.91.71.91.72.21.93.93.14.13.53.03.54.43.93.44.55.14.3

us-gaap:OtherIncome us-gaap:StatementBusinessSegments

afg:Annuity


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value363030352628272727272726242626272726242630222224212019182117151446141213
Percentage of OtherIncome70.666.758.861.454.253.852.954.050.950.062.853.146.254.255.345.851.956.530.056.545.555.024.451.177.871.473.185.780.870.860.063.695.828.625.533.3
Percentage of Revenues1.41.51.52.71.21.31.41.31.61.31.51.61.31.41.61.71.61.51.51.81.81.31.41.91.41.31.41.51.51.21.31.23.70.91.01.2
Percentage of Revenues afg:Annuity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

afg:PropertyAndCasualtyInsurance


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1.04.00.00.03.05.01.05.02.03.02.04.02.02.07.01.04.0165.03.0403.0172.0536.01.04.02.02.05.01.06.03.02016181310.0202015151321
Percentage of OtherIncome5.017.40.00.05.98.82.19.63.96.03.87.44.74.113.52.18.527.19.66.550.06.525.85.058.912.83.714.37.79.519.24.224.013.641.732.738.333.325.642.641.736.638.522.838.9
Percentage of Revenues0.10.30.00.00.20.40.00.20.10.10.10.20.10.10.40.10.21.00.30.22.50.21.00.13.40.50.10.30.10.20.40.10.50.31.61.01.61.20.81.51.81.41.31.02.0
Percentage of Revenues afg:PropertyAndCasualtyInsurance0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.01.62.41.80.02.12.72.20.01.53.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1002419694164167-304.0191143209326-35.02032081411661114515538811363104130661492512591831071659877113192118488127107374910912610088
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues65.427.826.58.08.6-23.89.06.710.716.1-2.110.111.38.79.20.68.89.822.36.64.07.18.03.99.71.98.25.86.08.812.16.86.89.81.513.57.37.99.98.03.44.79.410.09.58.5

us-gaap:ProfitLoss us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:NeonCapitalLimited


Profit
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-53.0-40.0-42.0-10.0-4.0-20.0
Percentage of ProfitLoss-7.6-24.4-25.13.3-2.1-14.0
Percentage of Revenues-2.0-1.9-2.2-0.8-0.2-0.9
Percentage of Revenues afg:NeonCapitalLimited0.00.00.00.00.00.0

Realized Investment Gains Losses

us-gaap:RealizedInvestmentGainsLosses

us-gaap:RealizedInvestmentGainsLosses


Realized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value98315864514204-550.065-18.057184-237.03629-93.05.0-10.01117553.018-15.0-10.0-9.052-133.010.016131968574758682421344517.019-3.03542114.0
Percentage of RealizedInvestmentGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues64.210.524.60.710.5-43.13.1-0.82.99.1-14.01.81.6-5.70.3-0.50.71.13.20.21.1-1.0-0.6-0.53.4-10.30.71.00.91.65.04.04.15.15.515.51.14.04.00.51.7-0.33.03.31.00.4

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1531150926232060195112752130212319602024169020081833161918081835164615761737170515811475162616841541129415291581139212111362144311391148123615631150111312831335109310391156125510521034
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2878074197735667311070867676437013069067676976613263456641906183460656606586016358618574645507254845527335103849859505574942448307475354655245355427704208740947394143913939171396333705236211360423513034053329483245427683
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities

afg:GreatAmericanLifeInsuranceCompany


Assetsus-gaap:
Period End2020-12-31
Value48434
Percentage of Assets65.8
Percentage of Assets65.8
Percentage of Assets afg:GreatAmericanLifeInsuranceCompany100.0

afg:NewCollateralizedLoanObligationTemporaryWarehousingEntities


Assetsus-gaap:
Period End2020-09-30
Value140
Percentage of Assets0.2
Percentage of Assets0.2
Percentage of Assets afg:NewCollateralizedLoanObligationTemporaryWarehousingEntities100.0

srt:ParentCompany


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value9035801164486822
Percentage of Assets12.311.410.211.2
Percentage of Assets12.311.410.211.2
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

us-gaap:VariableInterestEntityPrimaryBeneficiary


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value5086510249714717439340264736
Percentage of Assets17.76.96.86.56.26.06.8
Percentage of Assets17.76.96.86.56.26.06.8
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:FairValueInputsLevel1


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value269288217148151213
Percentage of Assets0.90.40.30.20.20.3
Percentage of Assets0.90.40.30.20.20.3
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary us-gaap:FairValueInputsLevel1100.0100.0100.0100.0100.0100.0

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:FairValueInputsLevel2


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value480248004733455442254506
Percentage of Assets16.76.56.46.26.06.4
Percentage of Assets16.76.56.46.26.06.4
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary us-gaap:FairValueInputsLevel2100.0100.0100.0100.0100.0100.0

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:FairValueInputsLevel3


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value151421151717
Percentage of Assets0.10.00.00.00.00.0
Percentage of Assets0.10.00.00.00.00.0
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary us-gaap:FairValueInputsLevel3100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:NeonCapitalLimited


Assetsus-gaap:
Period End2020-12-312020-09-30
Value787810
Percentage of Assets1.11.1
Percentage of Assets1.11.1
Percentage of Assets afg:NeonCapitalLimited100.0100.0

us-gaap:Assets us-gaap:StatementBusinessSegments

afg:Annuity


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4762645074399523717933409298652731724294209091824515646
Percentage of Assets64.764.363.061.360.759.957.557.753.450.648.2
Percentage of Assets64.764.363.061.360.759.957.557.753.450.648.2
Percentage of Assets afg:Annuity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:PropertyAndCasualtyInsurance


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value196891909817681171711557414689140691171712163118821160911863
Percentage of Assets26.827.227.928.328.329.529.627.831.133.035.842.9
Percentage of Assets26.827.227.928.328.329.529.627.831.133.035.842.9
Percentage of Assets afg:PropertyAndCasualtyInsurance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CorporateAndOther


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value6251595858235578533745333660366837953709
Percentage of Assets8.58.59.29.29.79.17.78.79.710.3
Percentage of Assets8.58.59.29.29.79.17.78.79.710.3
Percentage of Assets us-gaap:CorporateAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2317967512667776677064741625966386162746616076046758484590265675055473553245478453306522695015349487475404610145089456514444043207424814147440197377973731836237347763423134423346693227731479313513051029428283362783423764
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets80.591.090.891.391.492.591.190.891.091.492.292.091.891.591.291.190.991.091.190.290.290.390.490.389.989.489.489.188.688.488.788.588.287.587.987.587.186.987.086.886.486.085.885.8

us-gaap:Liabilities us-gaap:ConsolidatedEntities

afg:GreatAmericanLifeInsuranceCompany


Liabilitiesus-gaap:
Period End2020-12-31
Value44464
Percentage of Liabilities66.6
Percentage of Assets60.4
Percentage of Assets afg:GreatAmericanLifeInsuranceCompany91.8

afg:NewCollateralizedLoanObligationTemporaryWarehousingEntities


Liabilitiesus-gaap:
Period End2020-09-30
Value130
Percentage of Liabilities0.2
Percentage of Assets0.2
Percentage of Assets afg:NewCollateralizedLoanObligationTemporaryWarehousingEntities92.9

us-gaap:VariableInterestEntityPrimaryBeneficiary


Liabilitiesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value5029504547714541423638654571
Percentage of Liabilities21.77.57.16.86.56.27.2
Percentage of Assets17.56.86.56.26.05.76.5
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary98.998.996.096.396.496.096.5

us-gaap:Liabilities us-gaap:ConsolidatedEntities, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:FairValueInputsLevel1


Liabilitiesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value266285208142145206
Percentage of Liabilities1.10.40.30.20.20.3
Percentage of Assets0.90.40.30.20.20.3
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary us-gaap:FairValueInputsLevel198.999.095.995.996.096.7

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:FairValueInputsLevel2


Liabilitiesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value474947464543438440744349
Percentage of Liabilities20.57.06.86.66.36.8
Percentage of Assets16.56.46.26.05.76.2
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary us-gaap:FairValueInputsLevel298.998.996.096.396.496.5

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:FairValueInputsLevel3


Liabilitiesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value141420151716
Percentage of Liabilities0.10.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.0
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary us-gaap:FairValueInputsLevel393.3100.095.2100.0100.094.1

us-gaap:Liabilities us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:NeonCapitalLimited


Liabilitiesus-gaap:
Period End2020-12-312020-09-30
Value800767
Percentage of Liabilities1.21.1
Percentage of Assets1.11.0
Percentage of Assets afg:NeonCapitalLimited101.794.7

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2878074197735667311070867676437013069067676976613263456641906183460656606586016358618574645507254845527335103849859505574942448307475354655245355427704208740947394143913939171396333705236211360423513034053329483245427683
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-12-312019-12-312018-12-312017-12-31
Value9035801164486822
Percentage of LiabilitiesAndStockholdersEquity12.311.410.211.2
Percentage of Assets12.311.410.211.2
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value56016685678963406126504762696321609056654970516450845183533053795312519149165161500047554592472448024923487949044985479645994542447347334578477946224580454544654472446344703781
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.59.09.28.78.67.58.99.29.08.67.88.08.28.58.88.99.19.08.99.49.59.39.29.39.710.210.310.511.011.210.911.111.312.111.712.112.512.612.612.713.113.513.813.7

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

afg:GreatAmericanLifeInsuranceCompany


Stockholders
Period End2020-12-31
Value2899
Percentage of StockholdersEquity42.7
Percentage of Assets3.9
Percentage of Assets afg:GreatAmericanLifeInsuranceCompany6.0

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value6789626949705330
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets9.28.97.88.8
Percentage of Assets srt:ParentCompany75.178.377.178.1

us-gaap:StockholdersEquity us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:AnnuitySubsidiaries


Stockholders
Period End2021-05-312021-03-312020-12-31
Value286530122893
Percentage of StockholdersEquity0.045.142.6
Percentage of Assets0.04.13.9
Percentage of Assets afg:AnnuitySubsidiaries0.00.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value3365169128103747269816732314269323742000151520091810165923382349220718902107163915481231122089412161212134313102116187616391331127115291705162615231422132499116291499109911401011117011201264816
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.72.33.85.13.82.53.33.93.53.02.43.12.92.73.93.93.83.33.83.02.92.42.41.82.52.52.82.84.74.43.93.33.23.94.44.14.13.93.72.84.84.53.40.00.00.04.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities

afg:GreatAmericanLifeInsuranceCompany


Cash
Period End2020-12-31
Value1679
Percentage of CashAndCashEquivalentsAtCarryingValue59.8
Percentage of Assets2.3
Percentage of Assets afg:GreatAmericanLifeInsuranceCompany3.5

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value215166158299197189
Percentage of CashAndCashEquivalentsAtCarryingValue7.77.210.412.89.315.5
Percentage of Assets0.30.20.20.50.40.4
Percentage of Assets srt:ParentCompany2.42.12.54.40.00.0

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1.03.03.03.03.03.02.03.03.03.02.03.02.02.02.02.02.02.02.02.02.02.02.02.02.02.05.06.05.03.04.03.03.04.04.03.03.04.03.03.03.0
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value176176207207207207207207207207207199199199199199199199199199199199199201201201201201200185185185185185185185186186186186186186186208
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.20.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.40.40.40.40.40.40.40.40.40.40.40.40.40.50.50.50.50.50.50.50.50.50.50.60.60.8

us-gaap:Goodwill us-gaap:BalanceSheetLocation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:AssetsOfDiscontinuedAnnuityOperations, afg:AnnuitySubsidiaries


Goodwillus-gaap:
Period End2021-03-31
Value31
Percentage of Goodwill17.6
Percentage of Assets0.0
Percentage of Assets afg:AssetsOfDiscontinuedAnnuityOperations afg:AnnuitySubsidiaries0.0

us-gaap:Goodwill us-gaap:StatementBusinessSegments

afg:Annuity


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3131313131313333333434
Percentage of Goodwill15.015.015.015.615.615.616.417.817.818.318.3
Percentage of Assets0.00.00.00.10.10.10.10.10.10.10.1
Percentage of Assets afg:Annuity0.10.10.10.10.10.10.10.10.20.20.2

afg:PropertyAndCasualtyInsurance


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value176176176168168168168152152152152152
Percentage of Goodwill85.085.085.084.484.484.483.682.282.281.781.773.1
Percentage of Assets0.20.30.30.30.30.30.40.40.40.40.50.5
Percentage of Assets afg:PropertyAndCasualtyInsurance0.90.91.01.01.11.11.21.31.21.31.31.3

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value303134343740434548515431343626293032343638394143454749555819141821252832353841404349
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.00.00.00.10.10.10.10.10.10.10.00.10.10.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.00.10.10.10.10.10.10.10.10.10.2

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value43174365147388229-25.0-32.0-251.0-203.0-116.0
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.20.60.20.70.5-0.1-0.1-0.6-0.6-0.4

us-gaap:DeferredTaxAssetsLiabilitiesNet afg:ComponentsOfDeferredTaxAssetsAndLiabilities

afg:ExcludingUnrealizedGains


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value377403387370606410382
Percentage of DeferredTaxAssetsLiabilitiesNet876.7231.6106.0251.7156.2179.0-1528.0
Percentage of Assets0.50.60.60.61.10.80.8
Percentage of Assets afg:ExcludingUnrealizedGains0.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value124133139154163162158162162167174
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.20.20.20.20.20.20.20.20.30.0

Equity Securities Fv Ni

us-gaap:EquitySecuritiesFvNi

us-gaap:EquitySecuritiesFvNi


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value96594416631606160215591937200419851930181418271662
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.41.32.32.22.32.32.82.92.92.92.92.82.7

us-gaap:EquitySecuritiesFvNi us-gaap:BalanceSheetLocation, us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:AssetsOfDiscontinuedAnnuityOperations, us-gaap:EquitySecurities, us-gaap:FairValueInputsLevel1, afg:AnnuitySubsidiaries


Equity
Period End2021-03-312020-12-31
Value258431
Percentage of EquitySecuritiesFvNi27.325.9
Percentage of Assets0.30.6
Percentage of Assets afg:AssetsOfDiscontinuedAnnuityOperations us-gaap:EquitySecurities us-gaap:FairValueInputsLevel1 afg:AnnuitySubsidiaries0.00.0

afg:AssetsOfDiscontinuedAnnuityOperations, us-gaap:EquitySecurities, us-gaap:FairValueInputsLevel2, afg:AnnuitySubsidiaries


Equity
Period End2021-03-312020-12-31
Value4850
Percentage of EquitySecuritiesFvNi5.13.0
Percentage of Assets0.10.1
Percentage of Assets afg:AssetsOfDiscontinuedAnnuityOperations us-gaap:EquitySecurities us-gaap:FairValueInputsLevel2 afg:AnnuitySubsidiaries0.00.0

afg:AssetsOfDiscontinuedAnnuityOperations, us-gaap:EquitySecurities, us-gaap:FairValueInputsLevel3, afg:AnnuitySubsidiaries


Equity
Period End2021-03-312020-12-31
Value318293
Percentage of EquitySecuritiesFvNi33.717.6
Percentage of Assets0.40.4
Percentage of Assets afg:AssetsOfDiscontinuedAnnuityOperations us-gaap:EquitySecurities us-gaap:FairValueInputsLevel3 afg:AnnuitySubsidiaries0.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:BalanceSheetLocation, us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:AssetsOfDiscontinuedAnnuityOperations, us-gaap:EquitySecurities, afg:AnnuitySubsidiaries


Equity
Period End2021-03-312020-12-31
Value624774
Percentage of EquitySecuritiesFvNi66.146.5
Percentage of Assets0.81.1
Percentage of Assets afg:AssetsOfDiscontinuedAnnuityOperations us-gaap:EquitySecurities afg:AnnuitySubsidiaries0.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:ConsolidatedEntities

afg:GreatAmericanLifeInsuranceCompany


Equity
Period End2020-12-31
Value774
Percentage of EquitySecuritiesFvNi46.5
Percentage of Assets1.1
Percentage of Assets afg:GreatAmericanLifeInsuranceCompany1.6

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByAssetClass

us-gaap:EquitySecurities


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value96594416631606160215591937200419851930181418271662
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.41.32.32.22.32.32.82.92.92.92.92.82.7
Percentage of Assets us-gaap:EquitySecurities0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:EquitySecurities, us-gaap:FairValueInputsLevel1


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value67267010961090107510561433151815321507141014621411
Percentage of EquitySecuritiesFvNi69.671.065.967.967.167.774.075.777.278.177.780.084.9
Percentage of Assets2.30.91.51.51.51.62.02.22.32.32.22.32.3
Percentage of Assets us-gaap:EquitySecurities us-gaap:FairValueInputsLevel10.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecurities, us-gaap:FairValueInputsLevel2


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value48479872756767667669687686
Percentage of EquitySecuritiesFvNi5.05.05.94.54.74.33.53.33.83.63.74.25.2
Percentage of Assets0.20.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:EquitySecurities us-gaap:FairValueInputsLevel20.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecurities, us-gaap:FairValueInputsLevel3


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value245227469444452436437420377354336289165
Percentage of EquitySecuritiesFvNi25.424.028.227.628.228.022.621.019.018.318.515.89.9
Percentage of Assets0.90.30.60.60.60.60.60.60.60.50.50.50.3
Percentage of Assets us-gaap:EquitySecurities us-gaap:FairValueInputsLevel30.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FinancialInstrument

us-gaap:CommonStock


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value561536922874885919128312611251121811481151
Percentage of EquitySecuritiesFvNi58.156.855.454.455.258.966.262.963.063.163.363.0
Percentage of Assets1.90.71.31.21.21.41.81.81.81.81.81.8
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecurities


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value9659441663160616021559193720041985193018141827
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.41.32.32.22.32.32.82.92.92.92.92.8
Percentage of Assets us-gaap:EquitySecurities0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PreferredStock


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value404408741732717640654743734712666676
Percentage of EquitySecuritiesFvNi41.943.244.645.644.841.133.837.137.036.936.737.0
Percentage of Assets1.40.51.01.01.00.90.91.11.11.11.01.1
Percentage of Assets us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.00.00.0

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value8358651626174916761741186717541785185415291832157415511504152615181633165511881132118112121051113799410279851001913903887828824786741717810757768638618606577
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.91.22.22.42.42.62.72.52.62.82.42.92.52.62.52.52.62.83.02.22.12.32.42.12.32.12.22.12.22.12.12.22.12.12.01.91.92.22.12.21.91.91.92.1

us-gaap:OtherAssets us-gaap:ConsolidatedEntities

afg:GreatAmericanLifeInsuranceCompany


Other
Period End2020-12-31
Value968
Percentage of OtherAssets59.5
Percentage of Assets1.3
Percentage of Assets afg:GreatAmericanLifeInsuranceCompany2.0

srt:ParentCompany


Other
Period End2020-12-312019-12-312018-12-312017-12-31
Value21314368141
Percentage of OtherAssets13.17.74.49.4
Percentage of Assets0.30.20.10.2
Percentage of Assets srt:ParentCompany2.41.81.12.1

us-gaap:OtherAssets us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:NeonCapitalLimited


Other
Period End2020-12-312020-09-30
Value6073
Percentage of OtherAssets3.74.2
Percentage of Assets0.10.1
Percentage of Assets afg:NeonCapitalLimited7.69.0

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value19631963196321081912147314731423142314231302130213011301130112841405128312831300998998102088010241061106110629129139139139499509539661158931934937940949952828
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.82.62.72.92.72.22.12.12.12.22.12.02.12.12.12.12.42.22.32.41.92.02.01.72.12.22.22.32.02.12.22.22.42.42.42.43.12.62.62.72.82.92.93.0

us-gaap:LongTermDebt us-gaap:ConsolidatedEntities

srt:ParentCompany


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value1963147313021301
Percentage of LongTermDebt100.0100.0100.0100.0
Percentage of Assets2.72.12.12.1
Percentage of Assets srt:ParentCompany21.718.420.219.1

us-gaap:LongTermDebt us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

srt:ParentCompany, afg:SeniorNotesDueInApril2030, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value2942942942932930.0
Percentage of LongTermDebt15.015.015.013.915.30.0
Percentage of Assets1.00.40.40.40.40.0
Percentage of Assets srt:ParentCompany afg:SeniorNotesDueInApril2030 us-gaap:SeniorNotes0.00.00.00.00.00.0

srt:ParentCompany, afg:SeniorNotesDueInAugust2026, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value422422422422422422422421421421421421420
Percentage of LongTermDebt21.521.521.520.022.128.628.629.629.629.632.332.332.3
Percentage of Assets1.50.60.60.60.60.60.60.60.60.60.70.70.7
Percentage of Assets srt:ParentCompany afg:SeniorNotesDueInAugust2026 us-gaap:SeniorNotes0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, afg:SubordinatedDebenturesDueInJune2060, us-gaap:SubordinatedDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1461461461461460.0
Percentage of LongTermDebt7.47.47.46.97.60.0
Percentage of Assets0.50.20.20.20.20.0
Percentage of Assets srt:ParentCompany afg:SubordinatedDebenturesDueInJune2060 us-gaap:SubordinatedDebt0.00.00.00.00.00.0

srt:ParentCompany, afg:SubordinatedDebenturesDueInMarch2059, us-gaap:SubordinatedDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1211211211211211211211211211210.0
Percentage of LongTermDebt6.26.26.25.76.38.28.28.58.58.50.0
Percentage of Assets0.40.20.20.20.20.20.20.20.20.20.0
Percentage of Assets srt:ParentCompany afg:SubordinatedDebenturesDueInMarch2059 us-gaap:SubordinatedDebt0.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, afg:SubordinatedDebenturesDueInSeptember2060, us-gaap:SubordinatedDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-30
Value195195195196
Percentage of LongTermDebt9.99.99.99.3
Percentage of Assets0.70.30.30.3
Percentage of Assets srt:ParentCompany afg:SubordinatedDebenturesDueInSeptember2060 us-gaap:SubordinatedDebt0.00.00.00.0

srt:ParentCompany, afg:SubordinatedDebenturesdueinDecember2059, us-gaap:SubordinatedDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value1941941941941941941940.0
Percentage of LongTermDebt9.99.99.99.210.113.213.20.0
Percentage of Assets0.70.30.30.30.30.30.30.0
Percentage of Assets srt:ParentCompany afg:SubordinatedDebenturesdueinDecember2059 us-gaap:SubordinatedDebt0.00.00.00.00.00.00.00.0

us-gaap:LongTermDebt us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType

srt:ParentCompany, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1307130713071306130610131013101210121012101210121011
Percentage of LongTermDebt66.666.666.662.068.368.868.871.171.171.177.777.777.7
Percentage of Assets4.51.81.81.81.81.51.41.51.51.51.61.61.7
Percentage of Assets srt:ParentCompany us-gaap:SeniorNotes0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, us-gaap:SubordinatedDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value656656656802606460460411411411290290290
Percentage of LongTermDebt33.433.433.438.031.731.231.228.928.928.922.322.322.3
Percentage of Assets2.30.90.91.10.90.70.70.60.60.60.50.50.5
Percentage of Assets srt:ParentCompany us-gaap:SubordinatedDebt0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LongTermDebt us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value22912215232223942057140816191518147914031228125712621316135113771514137913531417112611101105962108311231106108996194290991697510149909761158918891
Percentage of LongTermDebt116.7112.8118.3113.6107.695.6109.9106.7103.998.694.396.597.0101.2103.8107.2107.8107.5105.5109.0112.8111.2108.3109.3105.8105.8104.2102.5105.4103.299.6100.3102.7106.7103.9101.0100.098.695.4
Percentage of Assets8.03.03.23.32.92.12.32.22.22.11.92.02.02.22.22.32.62.42.52.62.12.22.21.92.22.32.32.32.12.22.22.22.52.62.52.53.12.52.5
Percentage of Assets us-gaap:FairValueInputsLevel20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel3


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value3.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.021151515253774747575767676929396109113115119
Percentage of LongTermDebt0.20.20.20.10.20.20.20.20.20.20.20.20.20.20.20.20.20.20.21.61.51.51.52.83.67.07.07.18.28.38.38.39.79.810.111.39.812.412.7
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.20.20.20.20.20.20.20.20.20.20.30.30.30.3
Percentage of Assets us-gaap:FairValueInputsLevel30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LongTermDebt us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value196319631963210819121473147314231423142313021302130113011301128414051283128413061007100610228871026106110611062912913913913953
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.1100.5100.9100.8100.2100.8100.2100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.82.62.72.92.72.22.12.12.12.22.12.02.12.12.12.12.42.22.32.41.92.02.01.82.12.22.22.32.02.12.22.22.4
Percentage of Assets us-gaap:CarryingReportedAmountFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value229422182325239720601411162215211482140612311260126513191354138015171382135614381141112511209871120119711801164103610189859921086
Percentage of LongTermDebt116.9113.0118.4113.7107.795.8110.1106.9104.198.894.596.897.2101.4104.1107.5108.0107.7105.7110.6114.3112.7109.8112.2109.4112.8111.2109.6113.6111.5107.9108.7114.0
Percentage of Assets8.03.03.23.32.92.12.32.22.22.11.92.02.02.22.22.32.62.42.52.62.22.22.22.02.32.52.52.52.32.42.32.42.8
Percentage of Assets us-gaap:EstimateOfFairValueFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value35
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value29
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value23
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value20
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value28
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.0

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value143153159175184182180184185190198
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.20.20.20.30.30.30.30.30.30.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value178
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets0.2

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value19
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value56016685678963406126504762696321609056654970516450845183533053795312519149165161500047554592472448024923487949044985479645994542447347334578477946224580454544654472446344703781
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.59.09.28.78.67.58.99.29.08.67.88.08.28.58.88.99.19.08.99.49.59.39.29.39.710.210.310.511.011.210.911.111.312.111.712.112.512.612.612.713.113.513.813.7

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

afg:GreatAmericanLifeInsuranceCompany


Stockholders
Period End2020-12-31
Value2899
Percentage of StockholdersEquity42.7
Percentage of Assets3.9
Percentage of Assets afg:GreatAmericanLifeInsuranceCompany6.0

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value6789626949705330
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets9.28.97.88.8
Percentage of Assets srt:ParentCompany75.178.377.178.1

us-gaap:StockholdersEquity us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:AnnuitySubsidiaries


Stockholders
Period End2021-05-312021-03-312020-12-31
Value286530122893
Percentage of StockholdersEquity0.045.142.6
Percentage of Assets0.04.13.9
Percentage of Assets afg:AnnuitySubsidiaries0.00.00.0

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value5601668567896340612650476269632160905665497251645084518353315379531251954919535851934937477049064984510050545078515849734769471046384908474849644775473246914620462546124620474544474323391926023146
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.59.09.28.78.67.58.99.29.08.67.88.08.28.58.88.99.19.08.99.89.89.79.69.710.110.610.610.911.411.611.311.511.812.512.112.512.913.113.013.213.614.014.20.00.00.014.20.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value190967127312331053328639178094444844147305813689615499375753669448304461563776727718799677560570599869831931773714557563579503479607398290163-703.012
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest3.414.518.819.417.20.613.814.513.37.81.00.92.95.915.312.811.69.67.614.112.99.16.49.411.315.214.414.115.513.611.712.112.917.717.518.816.215.111.912.212.510.910.412.88.96.74.2-27.00.4
Percentage of Assets0.71.31.71.71.50.01.21.31.20.70.10.10.20.51.31.11.00.90.71.41.30.90.60.91.11.61.51.51.81.61.31.41.52.22.12.32.12.01.51.61.71.51.50.00.00.00.60.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStockIncludingAdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value1388136413671370138813991397138213671346133413201309129412691255124612261198132913151305130112821271126112401238124212281213119811771180115211621207122312191213123912621271129812991323134413511300
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest24.820.420.121.622.727.722.321.922.423.826.825.625.725.023.823.323.523.624.424.825.326.427.326.125.524.724.524.424.124.725.425.425.424.024.323.425.325.826.026.326.827.427.527.429.230.634.351.941.3
Percentage of Assets4.81.81.91.92.02.12.02.02.02.02.12.12.12.12.12.12.12.12.22.42.52.62.62.52.62.62.62.72.72.92.92.93.03.02.92.93.33.43.43.53.63.83.90.00.00.04.90.00.0
Percentage of Assets us-gaap:CommonStockIncludingAdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value5601668567896340612650476269632160905665497051645084518353305379531251914916516150004755459247244802492348794904498547964599454244734733457847794622458045454465447244634470459343014181378124903046
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.999.996.396.396.396.396.396.396.596.596.696.696.496.496.496.496.496.496.396.896.896.996.696.796.896.896.896.796.796.595.796.8
Percentage of Assets19.59.09.28.78.67.58.99.29.08.67.88.08.28.58.88.99.19.08.99.49.59.39.29.39.710.210.310.511.011.210.911.111.312.111.712.112.512.612.612.713.113.513.80.00.00.013.70.00.0
Percentage of Assets us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value402343544149373736853616400940223914387535883800362835843248343534513466334329872912
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest71.865.161.158.960.271.663.963.664.368.472.273.671.469.160.963.965.066.768.062.657.6
Percentage of Assets14.05.95.65.15.25.35.75.85.85.95.75.95.95.95.45.75.96.06.16.06.1
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value85858687899090909090898989898888888887878787878788888888909090898990899195979899101103105113
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.30.30.30.30.30.4

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value13031279128112831299130913071292127712561245123112201205118111671158113811111242122812181214119511831173115211501152113811231109108810901063107111121126112111141138115911661231
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.51.71.71.81.81.91.91.91.91.92.01.92.02.01.91.92.02.02.02.32.32.42.42.42.42.42.42.52.52.72.72.72.82.82.72.73.03.13.13.23.33.53.64.4

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value190967127312331053328639178094444844147305813689615499375753669448304461563776727718799677560570599869831931773714557563579503479607398163-703.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.71.31.71.71.50.01.21.31.20.70.10.10.20.51.31.11.00.90.71.41.30.90.60.91.11.61.51.51.81.61.31.41.52.22.12.32.12.01.51.61.71.51.50.00.00.60.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:BusinessAcquisition, us-gaap:StatementEquityComponents

afg:NeonCapitalLimited, us-gaap:AccumulatedOtherComprehensiveIncome


Accumulated
Period End2020-12-312020-09-30
Value-4.04.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-0.30.3
Percentage of Assets-0.00.0
Percentage of Assets afg:NeonCapitalLimited us-gaap:AccumulatedOtherComprehensiveIncome0.00.0

afg:NeonCapitalLimited, us-gaap:AccumulatedTranslationAdjustment


Accumulated
Period End2020-12-312020-09-30
Value-4.04.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-0.30.3
Percentage of Assets-0.00.0
Percentage of Assets afg:NeonCapitalLimited us-gaap:AccumulatedTranslationAdjustment0.00.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:ConsolidatedEntities

afg:GreatAmericanLifeInsuranceCompany


Accumulated
Period End2020-12-31
Value-1071.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-84.1
Percentage of Assets-1.5
Percentage of Assets afg:GreatAmericanLifeInsuranceCompany-2.2

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:AnnuitySubsidiaries


Accumulated
Period End2021-05-312021-03-312020-12-31
Value-913.0-801.0-1071.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax0.0-82.8-84.1
Percentage of Assets0.0-1.1-1.5
Percentage of Assets afg:AnnuitySubsidiaries0.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:Range, us-gaap:StatementEquityComponents, us-gaap:SubsequentEventType

srt:Maximum, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss, us-gaap:SubsequentEvent


Accumulated
Period End2020-10-01
Value300
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax0.0
Percentage of Assets0.0
Percentage of Assets srt:Maximum us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss us-gaap:SubsequentEvent0.0

srt:Minimum, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss, us-gaap:SubsequentEvent


Accumulated
Period End2020-10-01
Value275
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax0.0
Percentage of Assets0.0
Percentage of Assets srt:Minimum us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss us-gaap:SubsequentEvent0.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value1.0-7.0-7.0-7.0-7.0-7.0-7.0-7.0-8.0-8.0-8.0-8.0-8.0-8.0-8.0-7.0-7.0-7.0-7.0-6.0-6.0-6.0-7.0-7.0-8.0-8.0-8.0-4.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax0.5-0.7-0.5-0.6-0.7-21.9-0.8-0.8-1.0-1.8-16.7-18.2-5.4-2.6-1.0-1.0-1.1-1.4-1.9-0.8-0.9-1.3-2.3-1.5-1.4-1.0-1.1-0.7
Percentage of Assets0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Accumulated
Period End2021-03-312020-12-312020-06-302020-03-312019-12-31
Value2741474417
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax2.83.24.5137.52.0
Percentage of Assets0.00.10.10.10.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges


Accumulated
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value27414147441725180.0-11.0-32.0-27.0-24.0-13.0-6.0-6.0-8.0-7.05.05.04.01.02.00.01.00.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax2.83.23.34.5137.52.02.72.20.0-22.9-72.7-18.4-7.9-1.6-0.9-1.0-1.6-1.90.70.70.90.30.40.00.10.0
Percentage of Assets0.00.10.10.10.10.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value205963125512121030168629208124648393191342840706639529404772685466332489587799743563
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax107.999.698.698.397.850.099.9100.3100.4104.5172.9211.4129.9112.1103.3102.5103.9106.0107.7102.5102.4104.0109.2106.1104.3103.0102.2100.5
Percentage of Assets0.71.31.71.71.50.01.21.31.20.70.10.10.30.61.41.21.10.90.71.41.30.90.71.01.21.71.61.3
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value190967127312331053328639178094444844147305813689615499375753669448304461563776727560
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.71.31.71.71.50.01.21.31.20.70.10.10.20.51.31.11.00.90.71.41.30.90.60.91.11.61.51.3
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value-16.0-16.0-16.0-13.0-17.0-21.0-9.0-21.0-13.0-12.0-16.0-9.0-9.0-5.0-6.0-4.0-11.0-15.0-15.0-18.0-15.0-16.0-22.0-23.0-16.0-16.0-8.01.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-8.4-1.7-1.3-1.1-1.6-65.6-1.0-2.3-1.6-2.7-33.3-20.5-6.1-1.6-0.7-0.6-1.8-3.0-4.0-2.4-2.2-3.6-7.2-5.0-2.8-2.1-1.10.2
Percentage of Assets-0.1-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.00.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2.05.05.05.04.06.06.05.06.06.06.06.06.05.06.05.05.08.07.05.05.05.07.04.05.05.05.05.04.05.04.07.04.04.03.03.08.04.04.03.04.03.03.03.03.03.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:CommonStockIncludingAdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2.05.05.05.04.06.06.05.06.06.06.06.06.05.06.05.05.08.07.05.05.05.07.04.05.05.05.05.04.05.04.07.04.04.03.03.08.04.04.03.04.03.03.03.03.03.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStockIncludingAdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2.05.05.05.04.06.06.05.06.06.06.06.06.05.06.05.05.08.07.05.05.05.07.04.05.05.05.05.04.05.04.07.04.04.03.03.08.04.04.03.04.03.03.03.03.03.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value343627487609555532765814423454806454432391811419650-76.0477247913354503311793975481752952043721921375933026121610.06.01271453898332068393
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues22.441.618.629.628.441.735.938.321.622.447.722.623.624.244.922.839.5-4.827.514.55.822.727.719.711.630.735.811.121.216.827.313.312.05.126.716.718.80.90.59.513.337.47.225.56.538.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1599-938.0-792.0524357-1653.0-1287.0-726.0-368.0-684.0-1975.0-890.0-829.0-1656.0-1062.0-236.0-800.0-1194.0-535.0-699.0-551.0-1196.0-1162.0-1301.0-1146.0-968.0-1184.0-1465.0-544.0-426.0-1002.0-721.0-722.0-470.0-487.0-112.0-643.0-183.0-508.0-1190.0-484.0-257.0-331.0-667.0-404.0-303.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues104.4-62.2-30.225.418.3-129.6-60.4-34.2-18.8-33.8-116.9-44.3-45.2-102.3-58.7-12.9-48.6-75.8-30.8-41.0-34.9-81.1-71.5-77.3-74.4-74.8-77.4-92.7-39.1-35.2-73.6-50.0-63.4-40.9-39.4-7.2-55.9-16.4-39.6-89.1-44.3-24.7-28.6-53.1-38.4-29.3

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-904.0-172.0-632.0-84.0113480143231319715675635548586240-41.046710535265437778721038648971440669484489459938589327235236-46.0528271835425469268207476177-40.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-59.0-11.4-24.1-4.15.837.66.710.916.335.339.931.629.936.213.3-2.228.466.830.331.849.159.163.838.563.034.043.830.635.137.968.940.828.720.519.1-2.945.924.365.131.842.925.817.937.916.8-3.9

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1038-483.0-937.010491025-641.0-379.0319374485
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues67.8-32.0-35.750.952.5-50.3-17.815.019.124.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value343627487609555532765814423454806454432391811419650-76.0477247913354503311793975481752952043721921375933026121610.06.01271453898332068393
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues22.441.618.629.628.441.735.938.321.622.447.722.623.624.244.922.839.5-4.827.514.55.822.727.719.711.630.735.811.121.216.827.313.312.05.126.716.718.80.90.59.513.337.47.225.56.538.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1002419692164177-301.0211147210329-29.020421014516611145153385109541011296314119127116106103158831101205022699113109965583133132108106
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues65.427.826.48.09.1-23.69.96.910.716.3-1.710.211.59.09.20.68.89.722.26.43.46.87.93.79.11.58.37.37.68.511.65.89.710.54.014.58.610.28.57.25.08.011.510.510.310.3

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:Parent


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1002419692164177-301.0211147210329-29.020421014516611145153
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues65.427.826.48.09.1-23.69.96.910.716.3-1.710.211.59.09.20.68.89.7
Percentage of Revenues us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1002419692164177-301.0211147210329-29.020421014516611145153
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues65.427.826.48.09.1-23.69.96.910.716.3-1.710.211.59.09.20.68.89.7
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1002419694164167-304.0191143209326-35.02032081411661114515538811363104130661492512591831071659877113192118488127107374910912610088
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues65.427.826.58.08.6-23.89.06.710.716.1-2.110.111.38.79.20.68.89.822.36.64.07.18.03.99.71.98.25.86.08.812.16.86.89.81.513.57.37.99.98.03.44.79.410.09.58.5

us-gaap:ProfitLoss us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:NeonCapitalLimited


Profit
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-53.0-40.0-42.0-10.0-4.0-20.0
Percentage of ProfitLoss-7.6-24.4-25.13.3-2.1-14.0
Percentage of Revenues-2.0-1.9-2.2-0.8-0.2-0.9
Percentage of Revenues afg:NeonCapitalLimited0.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1599-938.0-792.0524357-1653.0-1287.0-726.0-368.0-684.0-1975.0-890.0-829.0-1656.0-1062.0-236.0-800.0-1194.0-535.0-699.0-551.0-1196.0-1162.0-1301.0-1146.0-968.0-1184.0-1465.0-544.0-426.0-1002.0-721.0-722.0-470.0-487.0-112.0-643.0-183.0-508.0-1190.0-484.0-257.0-331.0-667.0-404.0-303.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues104.4-62.2-30.225.418.3-129.6-60.4-34.2-18.8-33.8-116.9-44.3-45.2-102.3-58.7-12.9-48.6-75.8-30.8-41.0-34.9-81.1-71.5-77.3-74.4-74.8-77.4-92.7-39.1-35.2-73.6-50.0-63.4-40.9-39.4-7.2-55.9-16.4-39.6-89.1-44.3-24.7-28.6-53.1-38.4-29.3

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-904.0-172.0-632.0-84.0113480143231319715675635548586240-41.046710535265437778721038648971440669484489459938589327235236-46.0528271835425469268207476177-40.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-59.0-11.4-24.1-4.15.837.66.710.916.335.339.931.629.936.213.3-2.228.466.830.331.849.159.163.838.563.034.043.830.635.137.968.940.828.720.519.1-2.945.924.365.131.842.925.817.937.916.8-3.9

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302015-12-312014-12-312013-12-312013-09-302012-12-312012-09-302011-12-312011-09-302010-12-312010-09-30
Value-1.01964390.01940.00.01210.00.00.00.03670.00.03021450.00.00.0281210.00.01.0128
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0100.00.0100.00.00.0100.00.00.00.00.0100.00.00.0100.0100.00.00.00.0100.0100.00.00.0100.0100.0

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value122843215384140203361693616931163312052715827113242424111212222108202019108181717401716171716181617151615
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value114192809676610.00.00.00.00.00.09.026227613354731648320240.00.0673.010016297565285948491507675
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value17.020.0-160.0-22.00.230.220.020.190.190.2100.170.20.190.020.620.290.3-0.250.370.540.330.030.330.340.17-0.010.370.360.34-0.010.310.390.35-0.070.260.38
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value52.4350.9348.245.843.0241.4636.9232.1629.427.0524.98
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities afg:ComponentsOfDeferredTaxAssetsAndLiabilities

us-gaap:DeferredTaxLiabilities

afg:ImpactOfUnrealizedGains


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value33422922223218181407
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value99110088728531047886877705651577595
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsNet afg:ComponentsOfDeferredTaxAssetsAndLiabilities

afg:ExcludingUnrealizedGains


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value9259648698271025868813
Percentage of DeferredTaxAssetsNet93.395.699.797.097.998.092.7

afg:ImpactOfUnrealizedGains


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value66443.026221864
Percentage of DeferredTaxAssetsNet6.74.40.33.02.12.07.3

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value291401191091731301091031019754
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsValuationAllowance afg:ComponentsOfDeferredTaxAssetsAndLiabilities

afg:ExcludingUnrealizedGains


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value29140119109173130109
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0

afg:AmortizationOfDeferredLossOnReinsurance us-gaap:ConsolidatedEntities

afg:AmortizationOfDeferredLossOnReinsurance

afg:GreatAmericanLifeInsuranceCompany


Amortization
Period End2020-12-31
Value11
Percentage of AmortizationOfDeferredLossOnReinsurance100.0

afg:AmountPaidBySubsidiariesToPurchaseManagedInvestmentEntitiesLiabilitiesAfterIssuanceDate.

afg:AmountPaidBySubsidiariesToPurchaseManagedInvestmentEntitiesLiabilitiesAfterIssuanceDate.


Amount
Period End2020-12-312020-09-302020-06-302020-03-312017-12-312017-09-302016-12-312016-09-30
Value0.00.00.03913292.03.0
Percentage of AmountPaidBySubsidiariesToPurchaseManagedInvestmentEntitiesLiabilitiesAfterIssuanceDate.0.00.00.0100.0100.0100.0100.0100.0

afg:AnnuityAndSupplementalInsuranceAcquisitionExpenses

afg:AnnuityAndSupplementalInsuranceAcquisitionExpenses


Annuity
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value56172-35.01137212033285871508217554853555442353146643851464135394052361484748476048525381475449
Percentage of AnnuityAndSupplementalInsuranceAcquisitionExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:AnnuityBenefits

afg:AnnuityBenefits


Annuity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value216161287203426276251250339311334222260182257215224196160189223228189208151184157157166168137140120134124140147130127142125116104114118108
Percentage of AnnuityBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:AnnuityReceiptsCeded

afg:AnnuityReceiptsCeded


Annuity
Period End2021-06-302021-03-312020-12-312020-09-30
Value104207246168
Percentage of AnnuityReceiptsCeded100.0100.0100.0100.0

afg:CededAnnuitySurrendersBenefitsAndWithdrawals

afg:CededAnnuitySurrendersBenefitsAndWithdrawals


Ceded
Period End2021-06-302021-03-31
Value115167
Percentage of CededAnnuitySurrendersBenefitsAndWithdrawals100.0100.0

afg:CededInforceAnnuityBusiness us-gaap:ConsolidatedEntities, us-gaap:ReinsurancePolicyType

afg:CededInforceAnnuityBusiness

afg:GreatAmericanLifeInsuranceCompany, afg:BlockReinsurance


Ceded
Period End2020-12-31
Value5960
Percentage of CededInforceAnnuityBusiness100.0

afg:CededInforceAnnuityBusiness us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Ceded
Period End2020-10-01
Value6000
Percentage of CededInforceAnnuityBusiness0.0

afg:ChangeInUnrealizedAppreciationDepreciation us-gaap:FinancialInstrument

afg:ChangeInUnrealizedAppreciationDepreciation

afg:MarketableSecurities


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value16-35.0431821014-846.0-58.0108348381-10.0-98.0-151.0-277.013467
Percentage of ChangeInUnrealizedAppreciationDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:OtherIncludingDPACandReservesonAnnuityandLongtermCare


Change
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value166-283.0-1059.0816114-230.0-349.0-370.0188914724829-53.0
Percentage of ChangeInUnrealizedAppreciationDepreciation386.0-155.5-104.4-96.5-196.6-213.0-100.3-97.1-180.0-90.8-97.4-89.521.6-79.1

afg:Pretax


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value20-44.0552301284-1071.0-74.0137440483-13.0-124.0-191.0-351.0-24.0104
Percentage of ChangeInUnrealizedAppreciationDepreciation125.0125.7127.9126.4126.6126.6127.6126.9126.4126.8130.0126.5126.5126.7-17.9155.2

afg:TaxEffects


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-4.09.0-12.0-48.0-270.022516-29.0-92.0-102.03.0264074158-37.0
Percentage of ChangeInUnrealizedAppreciationDepreciation-25.0-25.7-27.9-26.4-26.6-26.6-27.6-26.9-26.4-26.8-30.0-26.5-26.5-26.7117.9-55.2

us-gaap:FixedMaturities


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value20-44.0-111.05132343-1887.0-188.0367789853-31.0-213.0-338.0-599.0-65.0133
Percentage of ChangeInUnrealizedAppreciationDepreciation125.0125.7-258.1281.9231.1223.0324.1339.8226.7223.9310.0217.3223.8216.2-48.5198.5

afg:ChangeinManagedInvestmentEntitiesAssetsAndLiabilities

afg:ChangeinManagedInvestmentEntitiesAssetsAndLiabilities


Changein
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-16.0387417-27.0-89.0-25.0-1.019-16.0
Percentage of ChangeinManagedInvestmentEntitiesAssetsAndLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:DeferredAnnuityAndLifePolicyAcquisitionCosts

afg:DeferredAnnuityAndLifePolicyAcquisitionCosts


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value494942333049434356647165705748446667584856686074464454425250-74.0-65.0-49.0-34.0-35.0-48.0-69.0-60.0-56.0-71.0-70.0-56.0-54.0-60.0-52.0-45.0
Percentage of DeferredAnnuityAndLifePolicyAcquisitionCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:DeferredLossOnCededReserves us-gaap:ConsolidatedEntities

afg:DeferredLossOnCededReserves

afg:GreatAmericanLifeInsuranceCompany


Deferred
Period End2020-12-31
Value180
Percentage of DeferredLossOnCededReserves100.0

afg:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfit

afg:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfit


Deferred
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302018-06-30
Value0.01140.0770.00.0-29.0
Percentage of DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfit0.0100.00.0100.00.00.0100.0

afg:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfit us-gaap:StatementBusinessSegments

afg:AnnuityLongtermCareandLife


Deferred
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302018-06-30
Value0.01140.0770.00.0-29.0
Percentage of DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfit0.0100.00.0100.00.00.0100.0

afg:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortizationExpenseNetInvestmentGainsLosses

afg:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortizationExpenseNetInvestmentGainsLosses


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value482.01.0-10.0-3.0-3.0-1.0-2.0-6.0-3.0-3.0-3.0-3.0-4.0-1.0-2.0-2.0-1.0-3.0-2.0-2.0-3.0-2.0-2.00.0-2.01.01.0-1.00.0-2.01.0
Percentage of DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortizationExpenseNetInvestmentGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0

afg:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortizationExpenseNetInvestmentGainsLosses us-gaap:StatementBusinessSegments

afg:AnnuityLongtermCareandLife


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value482.01.0-10.0-3.0-3.0-1.0-2.0-6.0-3.0-3.0-3.0-3.0-4.0-1.0-2.0-2.0-1.0-3.0-2.0-2.0-3.0-2.0-2.00.0-2.0-1.0
Percentage of DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortizationExpenseNetInvestmentGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0-100.0

afg:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsForeignCurrencyTranslationAdjustment

afg:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsForeignCurrencyTranslationAdjustment


Deferred
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-30
Value1000000.0-2000000.001000000.0-1000000.0-1000000.01000000.0-1000000.00-2000000.01000000.0-2000000.01000000.001000000.0-1000000.0-1000000.0-1000000.0-1000000.0-2000000.0-1000000.0
Percentage of DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsForeignCurrencyTranslationAdjustment100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

afg:DeferredPolicyAcquisitionCostsandPresentValueofFutureProfitsChangeinUnrealizedInvestmentGainLoss

afg:DeferredPolicyAcquisitionCostsandPresentValueofFutureProfitsChangeinUnrealizedInvestmentGainLoss


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value124-169.0-818.059189-169.0-294.0-295.0-5.07311620836-44.0-90.0-59.0354-10.0-205.0-170.0160-11.0219-71.0-35.055-101.0-105.06825
Percentage of DeferredPolicyAcquisitionCostsandPresentValueofFutureProfitsChangeinUnrealizedInvestmentGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:DeferredPolicyAcquisitionCostsandPresentValueofFutureProfitsChangeinUnrealizedInvestmentGainLoss us-gaap:StatementBusinessSegments

afg:AnnuityLongtermCareandLife


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value124-169.0-818.059189-169.0-294.0-295.0-5.07311620836-44.0-90.0-59.0354-10.0-205.0-170.0160-11.0219-71.0-35.055-101.0-105.06825
Percentage of DeferredPolicyAcquisitionCostsandPresentValueofFutureProfitsChangeinUnrealizedInvestmentGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:DeferredPolicyAcquisitionCostsandValueofBusinessAcquiredUnrealizedInvestmentGainLossChangeinUnrealized us-gaap:StatementBusinessSegments

afg:DeferredPolicyAcquisitionCostsandValueofBusinessAcquiredUnrealizedInvestmentGainLossChangeinUnrealized

afg:AnnuityLongtermCareandLife


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value124-169.0-818.059189-169.0-294.0-295.0-5.07311620836-44.0-90.0-59.0354-10.0-205.0-170.0160-11.0219-71.0-35.055-101.0-105.06825
Percentage of DeferredPolicyAcquisitionCostsandValueofBusinessAcquiredUnrealizedInvestmentGainLossChangeinUnrealized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:DeferredSalesInducementsAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfit us-gaap:StatementBusinessSegments

afg:DeferredSalesInducementsAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfit

afg:AnnuityLongtermCareandLife


Deferred
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302018-06-30
Value0-4000000.001000000.01000000.00-1000000.0
Percentage of DeferredSalesInducementsAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfit0.0100.00.0100.0100.00.0100.0

afg:DeferredSalesInducementsAmortizationExpenseNetInvestmentGainsLosses us-gaap:StatementBusinessSegments

afg:DeferredSalesInducementsAmortizationExpenseNetInvestmentGainsLosses

afg:AnnuityLongtermCareandLife


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value00-1000000.0000-1000000.00-1000000.000000-1000000.00-1000000.00-1000000.0000-1000000.000-1000000.00
Percentage of DeferredSalesInducementsAmortizationExpenseNetInvestmentGainsLosses0.00.0100.00.00.00.0100.00.0100.00.00.00.00.00.0100.00.0100.00.0100.00.00.00.0100.00.00.0100.00.0

afg:DerivativeGainLossOnDerivativeAnnuityUnlocking us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

afg:DerivativeGainLossOnDerivativeAnnuityUnlocking

afg:FixedIndexedAnnuitiesEmbeddedDerivative, us-gaap:Nondesignated, afg:Annuitybenefits


Derivative
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302018-06-30
Value0.02400.01810.00.0-44.0
Percentage of DerivativeGainLossOnDerivativeAnnuityUnlocking0.0100.00.0100.00.00.0100.0

afg:DiscontinuedOperationIncomeLossFromDiscontinuedOperationAfterIncomeTaxAndBeforeGainLossOnDisposalOfDiscontinuedOperation us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation

afg:DiscontinuedOperationIncomeLossFromDiscontinuedOperationAfterIncomeTaxAndBeforeGainLossOnDisposalOfDiscontinuedOperation

afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Discontinued
Period End2021-05-312020-06-30
Value6564
Percentage of DiscontinuedOperationIncomeLossFromDiscontinuedOperationAfterIncomeTaxAndBeforeGainLossOnDisposalOfDiscontinuedOperation100.0100.0

afg:DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperationOther us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperationOther

afg:AnnuitySubsidiaries


Discontinued
Period End2021-05-31
Value-1000000.0
Percentage of DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperationOther100.0

afg:DisposalGroupIncludingDiscontinuedOperationNetInvestmentIncome us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation

afg:DisposalGroupIncludingDiscontinuedOperationNetInvestmentIncome

afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Disposal
Period End2021-05-312021-03-312020-06-302020-03-31
Value299447382415
Percentage of DisposalGroupIncludingDiscontinuedOperationNetInvestmentIncome100.0100.0100.0100.0

afg:DisposalGroupIncludingDiscontinuedOperationsAnnuityAndSupplementalInsuranceAcquisitionExpenses us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation

afg:DisposalGroupIncludingDiscontinuedOperationsAnnuityAndSupplementalInsuranceAcquisitionExpenses

afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Disposal
Period End2021-05-312021-03-312020-06-302020-03-31
Value24112-35.0113
Percentage of DisposalGroupIncludingDiscontinuedOperationsAnnuityAndSupplementalInsuranceAcquisitionExpenses100.0100.0100.0100.0

afg:DisposalGroupIncludingDiscontinuedOperationsAnnuityBenefits us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation

afg:DisposalGroupIncludingDiscontinuedOperationsAnnuityBenefits

afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Disposal
Period End2021-05-312021-03-312020-06-302020-03-31
Value216161426276
Percentage of DisposalGroupIncludingDiscontinuedOperationsAnnuityBenefits100.0100.0100.0100.0

afg:DisposalGroupIncludingDiscontinuedOperationsExpensesFromDivestitureOfBusinesses us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:DisposalGroupIncludingDiscontinuedOperationsExpensesFromDivestitureOfBusinesses

afg:AnnuitySubsidiaries


Disposal
Period End2021-05-31
Value-8000000.0
Percentage of DisposalGroupIncludingDiscontinuedOperationsExpensesFromDivestitureOfBusinesses100.0

afg:DisposalGroupIncludingDiscontinuedOperationsMarketableSecuritiesRealizedGainLoss us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation

afg:DisposalGroupIncludingDiscontinuedOperationsMarketableSecuritiesRealizedGainLoss

afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Disposal
Period End2021-05-312021-03-312020-06-302020-03-31
Value318196-223.0
Percentage of DisposalGroupIncludingDiscontinuedOperationsMarketableSecuritiesRealizedGainLoss100.0100.0100.0100.0

afg:DisposalGroupIncludingDiscontinuedOperationsProceedsFromDivestitureOfBusinessesNet us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:DisposalGroupIncludingDiscontinuedOperationsProceedsFromDivestitureOfBusinessesNet

afg:AnnuitySubsidiaries


Disposal
Period End2021-05-31
Value3561
Percentage of DisposalGroupIncludingDiscontinuedOperationsProceedsFromDivestitureOfBusinessesNet100.0

afg:DisposalGroupIncludingDiscontinuedOperationsProceedsFromDivestitureOfBusinessesNetOfExpenses us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:DisposalGroupIncludingDiscontinuedOperationsProceedsFromDivestitureOfBusinessesNetOfExpenses

afg:AnnuitySubsidiaries


Disposal
Period End2021-05-31
Value3570
Percentage of DisposalGroupIncludingDiscontinuedOperationsProceedsFromDivestitureOfBusinessesNetOfExpenses100.0

afg:DisposalGroupIncludingDiscontinuedOperationsReclassificationOfNetDeferredTaxAssets us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:DisposalGroupIncludingDiscontinuedOperationsReclassificationOfNetDeferredTaxAssets

afg:AnnuitySubsidiaries


Disposal
Period End2021-05-31
Value-210000000.0
Percentage of DisposalGroupIncludingDiscontinuedOperationsReclassificationOfNetDeferredTaxAssets100.0

afg:DisposalGroupNetEarningsAfterTax us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:DisposalGroupNetEarningsAfterTax

afg:NeonCapitalLimited


Disposal
Period End2020-09-30
Value3000000.0
Percentage of DisposalGroupNetEarningsAfterTax100.0

afg:DisposalGroupTotalLossFromExitedLinesPretax us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:DisposalGroupTotalLossFromExitedLinesPretax

afg:NeonCapitalLimited


Disposal
Period End2020-09-30
Value-70000000.0
Percentage of DisposalGroupTotalLossFromExitedLinesPretax100.0

afg:EarningsFromRealEstateRelatedInvestmentsNetOfDAC us-gaap:StatementOperatingActivitiesSegment

afg:EarningsFromRealEstateRelatedInvestmentsNetOfDAC

us-gaap:SegmentContinuingOperations


Earnings
Period End2021-06-302021-03-312020-06-302020-03-31
Value22292.06.0
Percentage of EarningsFromRealEstateRelatedInvestmentsNetOfDAC100.0100.0100.0100.0

afg:EarningsLossesOfVariableInterestEntitiesAttributableToShareholders

afg:EarningsLossesOfVariableInterestEntitiesAttributableToShareholders


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value141819132.0-36.0-7.0-5.05.011-4.04.04.03.07.05.05.06.08.01719-7.0-11.0-3.05.03.0-2.07.06.05.08.09.07.01110.0115.05.01.0-2.01.06.0
Percentage of EarningsLossesOfVariableInterestEntitiesAttributableToShareholders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:EarningsLossesOfVariableInterestEntitiesAttributableToShareholders us-gaap:ConsolidatedEntities, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:StatementOperatingActivitiesSegment

us-gaap:VariableInterestEntityPrimaryBeneficiary, afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Earnings
Period End2021-06-302021-03-312020-06-302020-03-31
Value7.0132.0-25.0
Percentage of EarningsLossesOfVariableInterestEntitiesAttributableToShareholders50.072.2100.069.4

afg:EarningsLossesOfVariableInterestEntitiesAttributableToShareholders us-gaap:ConsolidatedEntities, us-gaap:StatementOperatingActivitiesSegment

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:SegmentContinuingOperations


Earnings
Period End2021-06-302021-03-312020-06-302020-03-31
Value7.05.00.0-11.0
Percentage of EarningsLossesOfVariableInterestEntitiesAttributableToShareholders50.027.80.030.6

afg:EstimatedProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:EstimatedProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries

afg:NeonCapitalLimited


Estimated
Period End2020-09-30
Value6000000.0
Percentage of EstimatedProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries100.0

afg:EstimatedProceedsFromDivestitureOfInterestInConsolidatedSubsidiariesNetOfExpenses us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:EstimatedProceedsFromDivestitureOfInterestInConsolidatedSubsidiariesNetOfExpenses

afg:NeonCapitalLimited


Estimated
Period End2020-09-30
Value4000000.0
Percentage of EstimatedProceedsFromDivestitureOfInterestInConsolidatedSubsidiariesNetOfExpenses100.0

afg:ExpensesOfManagedInvestmentEntities

afg:ExpensesOfManagedInvestmentEntities


Expenses
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3939323138485254595557525448444551414238363532282824221921202122242222192019181718181715149.0
Percentage of ExpensesOfManagedInvestmentEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:FaceAmountOfManagedInvestmentEntitiesLiabilitiesPurchasedBySubsidiariesAfterIssuanceDate

afg:FaceAmountOfManagedInvestmentEntitiesLiabilitiesPurchasedBySubsidiariesAfterIssuanceDate


Face
Period End2020-12-312020-09-302020-06-302020-03-312017-12-312017-09-302016-12-312016-09-30
Value0.00.00.05713295.06.0
Percentage of FaceAmountOfManagedInvestmentEntitiesLiabilitiesPurchasedBySubsidiariesAfterIssuanceDate0.00.00.0100.0100.0100.0100.0100.0

afg:FairValueInputAdjustmentforInsuranceSubsidiarysCreditRisk us-gaap:Range, us-gaap:DerivativeInstrumentRisk

afg:FairValueInputAdjustmentforInsuranceSubsidiarysCreditRisk

srt:Minimum, us-gaap:EmbeddedDerivativeFinancialInstruments


Fair
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value00.198-0.0170.01900.00100.0010.002
Percentage of FairValueInputAdjustmentforInsuranceSubsidiarysCreditRisk0.0100.0100.0100.00.0100.00.0100.0100.0

afg:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetDispositionOfSubsidiaries

afg:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetDispositionOfSubsidiaries


Fair
Period End2021-05-31
Value2719
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetDispositionOfSubsidiaries100.0

afg:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetDispositionOfSubsidiaries us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:AssetsOfDiscontinuedAnnuityOperations, afg:AnnuitySubsidiaries


Fair
Period End2021-05-31
Value2719
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetDispositionOfSubsidiaries100.0

afg:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityDispositionOfSubsidiaries

afg:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityDispositionOfSubsidiaries


Fair
Period End2021-05-31
Value4143
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityDispositionOfSubsidiaries100.0

afg:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityDispositionOfSubsidiaries us-gaap:FairValueByLiabilityClass, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:LiabilitiesOfDiscontinuedAnnuityOperations, afg:AnnuitySubsidiaries


Fair
Period End2021-05-31
Value4143
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityDispositionOfSubsidiaries100.0

afg:GainLossOnChangeInFairValueOfAssetsOfVariableInterestEntities

afg:GainLossOnChangeInFairValueOfAssetsOfVariableInterestEntities


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2146115132363-679.011-18.00.087-194.020-29.0144.0-8.0-9.05.0246048-1.0-89.0-53.0-7.033-34.0-30.0-1.0-1.010.0-2.0-14.0173.039-2.05538-88.0-12.0295347-31.0
Percentage of GainLossOnChangeInFairValueOfAssetsOfVariableInterestEntities100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:GainLossOnChangeInFairValueOfLiabilitiesOfVariableInterestEntities

afg:GainLossOnChangeInFairValueOfLiabilitiesOfVariableInterestEntities


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-15.0-44.0-107.0-131.0-368.0636-25.04.0-2.0-87.0183-25.027-17.0-4.09.020-5.0-18.0-49.0-37.0-12.071425.0-36.0255.0-9.01.0-3.017-14.0-25.0-34.0-52.0-19.0-84.0-17.089-10.0-62.0-79.0-51.016
Percentage of GainLossOnChangeInFairValueOfLiabilitiesOfVariableInterestEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:GainLossonChangeinFairValueofAssetsandLiabilitiesofManagedInvestmentEntities

afg:GainLossonChangeinFairValueofAssetsandLiabilitiesofManagedInvestmentEntities


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value6.02.08.01.0-5.0-43.0-14.0-14.0-2.00.0-11.0-5.0-2.0-3.00.01.011
Percentage of GainLossonChangeinFairValueofAssetsandLiabilitiesofManagedInvestmentEntities100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0

afg:ImpactofUnlockingChangesintheFairValueofDerivativesandChangesintheStockMarketandInterestRatesontheAccountingforFIAs

afg:ImpactofUnlockingChangesintheFairValueofDerivativesandChangesintheStockMarketandInterestRatesontheAccountingforFIAs


Impactof
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-48.0-43.0-59.0-38.024-27.0-33.0-11.0-66.017-14.015
Percentage of ImpactofUnlockingChangesintheFairValueofDerivativesandChangesintheStockMarketandInterestRatesontheAccountingforFIAs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:IncreaseDecreaseinReinsuranceandOtherReceivables

afg:IncreaseDecreaseinReinsuranceandOtherReceivables


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value422-275.0-64.0643115-161.0-218.041543-128.0-657.0940173-245.0
Percentage of IncreaseDecreaseinReinsuranceandOtherReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:InforceAnnuityBusinessCededPercentOfTotalInforce us-gaap:ConsolidatedEntities

afg:InforceAnnuityBusinessCededPercentOfTotalInforce

afg:GreatAmericanLifeInsuranceCompany


Inforce
Period End2020-12-31
Value15.0
Percentage of InforceAnnuityBusinessCededPercentOfTotalInforce100.0

afg:InforceAnnuityBusinessCededPercentOfTotalInforce us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Inforce
Period End2020-10-01
Value15.0
Percentage of InforceAnnuityBusinessCededPercentOfTotalInforce0.0

afg:InvestmentAndOtherIncomeNet us-gaap:ConsolidatedEntities, us-gaap:StatementBusinessSegments, us-gaap:Subsegments

afg:InvestmentAndOtherIncomeNet

afg:NeonCapitalLimited, afg:PropertyAndCasualtyInsurance, afg:OtherLines


Investment
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.0-2.0-1.0-9.0
Percentage of InvestmentAndOtherIncomeNet0.0100.0100.0100.0

afg:InvestmentAndOtherIncomeNet us-gaap:StatementBusinessSegments

afg:PropertyAndCasualtyInsurance


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1361541111006584109118115951071011069378879193727911575797512473646462546153605662586055
Percentage of InvestmentAndOtherIncomeNet0.00.00.0-5000.0-6500.0-933.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

afg:InvestmentIncomeOfManagedInvestmentEntities

afg:InvestmentIncomeOfManagedInvestmentEntities


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value44464746495963677069686564585554505149484845434038343229272830323234333132292727262525232322
Percentage of InvestmentIncomeOfManagedInvestmentEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:LossRecognitionCharge us-gaap:StatementBusinessSegments

afg:LossRecognitionCharge

afg:RunOffLongTermCareAndLife


Loss
Period End2020-09-302012-12-31
Value4.0153
Percentage of LossRecognitionCharge100.0100.0

afg:ManagementFeesPaidByVariableInterestEntities

afg:ManagementFeesPaidByVariableInterestEntities


Management
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value4.04.04.03.04.04.04.04.04.03.04.04.04.04.04.05.05.04.05.04.04.04.04.04.03.04.07.07.08.03.04.04.04.04.04.06.04.04.06.05.05.03.02.05.04.0
Percentage of ManagementFeesPaidByVariableInterestEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:NetHoldingGainsLossesOnEquitySecurities afg:EquitySecurities, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:FinancialInstrument

afg:NetHoldingGainsLossesOnEquitySecurities

afg:EquitySecuritiesStillOwned, us-gaap:AccountingStandardsUpdate201601, us-gaap:EquitySecurities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9325319171-545.027-7.045174-222.02731-95.0
Percentage of NetHoldingGainsLossesOnEquitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:NetTransfersFromToSeparateAccounts

afg:NetTransfersFromToSeparateAccounts


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value9.0251716131515171513121410.0111113131713128.09.0111210.010.07.02010.06.07.0139.03.05.0221.08.0
Percentage of NetTransfersFromToSeparateAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:OperatingIncomeLossBeforeRealizedGainsLossesAndIncomeTaxes

afg:OperatingIncomeLossBeforeRealizedGainsLossesAndIncomeTaxes


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value24125824011914163194195203229199210229267261411972202661761501742351102271731821321181421838685118-101.044121102
Percentage of OperatingIncomeLossBeforeRealizedGainsLossesAndIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:OperatingIncomeLossBeforeRealizedGainsLossesAndIncomeTaxes us-gaap:StatementBusinessSegments

afg:Annuity


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value8178-17.02912873719020117991259710285961321077653101678875858684739278777668695960
Percentage of OperatingIncomeLossBeforeRealizedGainsLossesAndIncomeTaxes33.865.5-121.417.866.037.435.039.310.155.743.246.837.2248.843.143.649.660.850.730.543.060.938.843.446.765.271.251.450.390.790.664.4-67.3156.848.858.8

afg:PropertyAndCasualtyInsurance


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value288288221118741711211721741822081391781842516.016317118212111216217990174133143110911121366179997442105103
Percentage of OperatingIncomeLossBeforeRealizedGainsLossesAndIncomeTaxes119.5111.692.199.2528.6104.962.488.285.779.5104.566.277.768.996.214.682.777.768.468.874.793.176.281.876.776.978.683.377.178.974.370.992.983.9-73.395.586.8101.0

us-gaap:CorporateAndOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value-47.0-30.0-62.0-77.0-43.0-37.0-55.0-50.0-42.0-43.0-29.0-46.0-48.0-42.0-89.0-69.0-53.0-47.0-50.0-53.0-38.0-40.0-45.0-53.0-39.0-39.0-39.0-65.0-55.0-41.0-42.0-49.0-69.0-56.0-76.0-79.0
Percentage of OperatingIncomeLossBeforeRealizedGainsLossesAndIncomeTaxes-19.5-11.6-25.8-64.7-307.1-22.7-28.4-25.6-20.7-18.8-14.6-21.9-21.0-15.7-34.1-168.3-26.9-21.4-18.8-30.1-25.3-23.0-19.1-48.2-17.2-22.5-21.4-49.2-46.6-28.9-23.0-57.0-81.2-47.575.2-179.5

afg:OperatingTaxLiabilitiesTriggeredByPendingSale us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:OperatingTaxLiabilitiesTriggeredByPendingSale

afg:AnnuitySubsidiaries


Operating
Period End2021-05-31
Value41
Percentage of OperatingTaxLiabilitiesTriggeredByPendingSale100.0

afg:OperatingTaxLiabilitiesTriggeredByPendingSale us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation

afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Operating
Period End2021-03-31
Value41
Percentage of OperatingTaxLiabilitiesTriggeredByPendingSale0.0

afg:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTaxDispositionOfSubsidiaries

afg:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTaxDispositionOfSubsidiaries


Other
Period End2021-06-30
Value29
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTaxDispositionOfSubsidiaries100.0

afg:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTaxDispositionOfSubsidiaries us-gaap:StatementEquityComponents

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-30
Value29
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTaxDispositionOfSubsidiaries100.0

afg:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTaxDispositionOfSubsidiaries

afg:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTaxDispositionOfSubsidiaries


Other
Period End2021-06-30
Value-37000000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTaxDispositionOfSubsidiaries100.0

afg:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTaxDispositionOfSubsidiaries

afg:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTaxDispositionOfSubsidiaries


Other
Period End2021-06-30
Value-8000000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTaxDispositionOfSubsidiaries100.0

afg:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementReclassificationAdjustmentFromAOCIAfterTax

afg:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementReclassificationAdjustmentFromAOCIAfterTax


Other
Period End2021-06-30
Value9000000.0
Percentage of OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementReclassificationAdjustmentFromAOCIAfterTax100.0

afg:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementReclassificationAdjustmentFromAOCIAfterTax us-gaap:StatementEquityComponents

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-30
Value9000000.0
Percentage of OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementReclassificationAdjustmentFromAOCIAfterTax100.0

afg:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementReclassificationAdjustmentFromAOCIBeforeTax

afg:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementReclassificationAdjustmentFromAOCIBeforeTax


Other
Period End2021-06-30
Value11
Percentage of OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementReclassificationAdjustmentFromAOCIBeforeTax100.0

afg:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementReclassificationAdjustmentFromAOCITax

afg:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementReclassificationAdjustmentFromAOCITax


Other
Period End2021-06-30
Value2000000.0
Percentage of OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementReclassificationAdjustmentFromAOCITax100.0

afg:OtherComprehensiveIncomeLossNetofTaxAttributabletoRedeemableNoncontrollingInterests

afg:OtherComprehensiveIncomeLossNetofTaxAttributabletoRedeemableNoncontrollingInterests


Other
Period End2020-09-302020-06-302020-03-312019-09-302019-06-30
Value002000000.01000000.01000000.0
Percentage of OtherComprehensiveIncomeLossNetofTaxAttributabletoRedeemableNoncontrollingInterests0.00.0100.0100.0100.0

afg:OtherComprehensiveIncomeLossNetofTaxincludingPortionAttributabletoNoncontrollingInterest

afg:OtherComprehensiveIncomeLossNetofTaxincludingPortionAttributabletoNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value-777.0-306.01761021-831.0108365396-103.0-158.0
Percentage of OtherComprehensiveIncomeLossNetofTaxincludingPortionAttributabletoNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:OtherComprehensiveIncomeLossReclassificationAdjustmentForRealizedGainsLossesIncludedInNetIncomeNetOfTax

afg:OtherComprehensiveIncomeLossReclassificationAdjustmentForRealizedGainsLossesIncludedInNetIncomeNetOfTax


Other
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value11127.0-19.0-1.0-1.08.03.0-11.02.03.0-2.013-8.05.00.0321.0-10.0-11.0-12.0-10.01.0125.08.08.0124536273642561228341417
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentForRealizedGainsLossesIncludedInNetIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTaxDispositionOfSubsidiaries

afg:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTaxDispositionOfSubsidiaries


Other
Period End2021-06-30
Value1119
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTaxDispositionOfSubsidiaries100.0

afg:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTaxDispositionOfSubsidiaries

afg:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTaxDispositionOfSubsidiaries


Other
Period End2021-06-30
Value884
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTaxDispositionOfSubsidiaries100.0

afg:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTaxDispositionOfSubsidiaries us-gaap:StatementEquityComponents

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-30
Value884
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTaxDispositionOfSubsidiaries100.0

afg:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTaxDispositionOfSubsidiaries

afg:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTaxDispositionOfSubsidiaries


Other
Period End2021-06-30
Value-235000000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTaxDispositionOfSubsidiaries100.0

afg:PercentageBasedOnFairValueOfAvailableForSaleFixedMaturitiesThatAreInUnrealizedLossPositionAndRatedInvestmentGrade

afg:PercentageBasedOnFairValueOfAvailableForSaleFixedMaturitiesThatAreInUnrealizedLossPositionAndRatedInvestmentGrade


Percentage
Period End2021-06-302021-03-312020-12-312011-09-30
Value091.04.0-0.13
Percentage of PercentageBasedOnFairValueOfAvailableForSaleFixedMaturitiesThatAreInUnrealizedLossPositionAndRatedInvestmentGrade0.0100.0100.0100.0

afg:PercentageBasedOnUnrealizedLossOfAvailableForSaleFixedMaturitiesThatAreInUnrealizedLossPositionAndRatedInvestmentGrade

afg:PercentageBasedOnUnrealizedLossOfAvailableForSaleFixedMaturitiesThatAreInUnrealizedLossPositionAndRatedInvestmentGrade


Percentage
Period End2021-06-302021-03-312020-12-312011-09-30
Value-6.075.0-1.0-0.05
Percentage of PercentageBasedOnUnrealizedLossOfAvailableForSaleFixedMaturitiesThatAreInUnrealizedLossPositionAndRatedInvestmentGrade100.0100.0100.0100.0

afg:PretaxCatastropheLosses

afg:PretaxCatastropheLosses


Pretax
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302012-12-312011-06-302010-06-30
Value3857269.0-15.0-22.0-12.0-12.0-38.0-38.0-16.0-13.0107322334
Percentage of PretaxCatastropheLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:ProceedsFromIssuanceOfManagedInvestmentEntities

afg:ProceedsFromIssuanceOfManagedInvestmentEntities


Proceeds
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value2657523993710.00.00.04110.079777580594944053712650.099731333545361038623381554544595419233325970.0359
Percentage of ProceedsFromIssuanceOfManagedInvestmentEntities100.0100.0100.0100.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

afg:ProceedsFromSalesAndRedemptionsOfInvestmentsByManagedInvestmentEntities

afg:ProceedsFromSalesAndRedemptionsOfInvestmentsByManagedInvestmentEntities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value5045574032781703703283793293734634505574784316056801058509610481290170246290149264340371442389300637578428323332774221416354400360217231210
Percentage of ProceedsFromSalesAndRedemptionsOfInvestmentsByManagedInvestmentEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:ProceedsFromSalesOfRealEstatePropertyAndEquipment

afg:ProceedsFromSalesOfRealEstatePropertyAndEquipment


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312012-12-312012-09-302011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-2.03.03.01.01.01.01.01.00.02.01.00.01.01.0292410.02.0385.0214.069233.08.02.01.00.01.0-1.03.01.00.01.02.00.01.0
Percentage of ProceedsFromSalesOfRealEstatePropertyAndEquipment100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.00.0100.0

afg:ProceedsReceivedBySubsidiariesRelatedtoSalesandRedemptionsofManagedInvestmentEntitiesLiabilities

afg:ProceedsReceivedBySubsidiariesRelatedtoSalesandRedemptionsofManagedInvestmentEntitiesLiabilities


Proceeds
Period End2021-06-302021-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-30
Value9.0290.00.028171722604.0460.046230.0
Percentage of ProceedsReceivedBySubsidiariesRelatedtoSalesandRedemptionsofManagedInvestmentEntitiesLiabilities100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0

afg:ProceedsReceivedBySubsidiariesRelatedtoSalesandRedemptionsofManagedInvestmentEntitiesLiabilities us-gaap:Range

srt:Maximum


Proceeds
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.00.01.00.00.00.01.0
Percentage of ProceedsReceivedBySubsidiariesRelatedtoSalesandRedemptionsofManagedInvestmentEntitiesLiabilities0.00.00.00.00.00.00.0

afg:PropertyAndCasualtyCommissionsAndOtherUnderwritingExpenses

afg:PropertyAndCasualtyCommissionsAndOtherUnderwritingExpenses


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value390380390406409420450450426399378424400381345357366339311356348334333336338313303302300267247261260251190254232211186230207212164222207204
Percentage of PropertyAndCasualtyCommissionsAndOtherUnderwritingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:PropertyAndCasualtyCommissionsAndOtherUnderwritingExpenses us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:NeonCapitalLimited


Property
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value272038326050
Percentage of PropertyAndCasualtyCommissionsAndOtherUnderwritingExpenses6.94.99.37.613.311.1

afg:PropertyAndCasualtyInsuranceUnderwritingIncomeLoss us-gaap:ConsolidatedEntities, us-gaap:StatementBusinessSegments, us-gaap:Subsegments

afg:PropertyAndCasualtyInsuranceUnderwritingIncomeLoss

afg:NeonCapitalLimited, afg:PropertyAndCasualtyInsurance, afg:OtherLines


Property
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-53.0-38.0-43.0-1.0-3.0-19.0-4.010.0
Percentage of PropertyAndCasualtyInsuranceUnderwritingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0

afg:PropertyAndCasualtyInsuranceUnderwritingIncomeLoss us-gaap:StatementBusinessSegments

afg:PropertyAndCasualtyInsurance


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value152134110189.08712545987101387291173-81.0727811042-3.08710015506079462958758.0194310.0-16.045488956-11.055946863
Percentage of PropertyAndCasualtyInsuranceUnderwritingIncomeLoss0.00.0-207.5-47.4-20.9-8700.0-400.0-284.2-1475.0870.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

afg:PropertyAndCasualtyInsuranceUnderwritingIncomeLoss us-gaap:StatementBusinessSegments, us-gaap:Subsegments

afg:PropertyAndCasualtyInsurance, afg:OtherLines


Property
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-1.0-69.0-86.0-45.0-2.0-77.0-34.0-1.0-1.0-1.0-17.0-1.0-1.017-90.0-1.0-1.00.0-36.0-66.01.00.0-69.0-1.0
Percentage of PropertyAndCasualtyInsuranceUnderwritingIncomeLoss0.0130.2226.3104.7200.02566.7178.925.0-10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

afg:PropertyAndCasualtyInsurance, afg:SpecialtyCasualtyInsurance


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value7156915327526923473622492941582.0291513132329503137
Percentage of PropertyAndCasualtyInsuranceUnderwritingIncomeLoss0.00.0-171.7-139.5-62.8-5200.0-2300.0-121.1-1175.0360.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

afg:PropertyAndCasualtyInsurance, afg:SpecialtyFinancialInsurance


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value212520130.01732262113209.0221519-3.0232220192223152624
Percentage of PropertyAndCasualtyInsuranceUnderwritingIncomeLoss0.00.0-37.7-34.2-0.0-1700.0-1066.7-136.8-525.0130.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

afg:PropertyAndCasualtyInsurance, afg:SpecialtyOtherInsurance


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-1.0-3.0-6.0-9.0-6.0-7.0-10.01.0-12.00.0-4.0-3.0-1.03.0-5.04.00.0-1.02.02.03.02.01.07.03.0
Percentage of PropertyAndCasualtyInsuranceUnderwritingIncomeLoss0.00.011.323.714.0700.0333.3-5.3300.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

afg:PropertyAndCasualtyInsurance, afg:SpecialtyPropertyAndTransportationInsurance


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value625674473327-2.0384.039640.02333846.02143754415323420-13.0
Percentage of PropertyAndCasualtyInsuranceUnderwritingIncomeLoss0.00.0-139.6-123.7-76.7-2700.066.7-200.0-100.0390.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

afg:PurchasesOfInvestmentsByManagedInvestmentEntities

afg:PurchasesOfInvestmentsByManagedInvestmentEntities


Purchases
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value460527624275189414336365306391443413655606649550870910849536630239363359550258617425406244365232389440603321359566478404329352391223253141
Percentage of PurchasesOfInvestmentsByManagedInvestmentEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:PurchasesOfRealEstatePropertyAndEquipment

afg:PurchasesOfRealEstatePropertyAndEquipment


Purchases
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value13131921119.0111310.010.0201621236316191112118.0183733131913146.0149.05.010.02810.09.08.0444.0253720128.01638
Percentage of PurchasesOfRealEstatePropertyAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:RealizedGainsLossesOnDisposalOfSubsidiaries

afg:RealizedGainsLossesOnDisposalOfSubsidiaries


Realized
Period End2020-12-312020-09-30
Value53-30.0
Percentage of RealizedGainsLossesOnDisposalOfSubsidiaries100.0100.0

afg:RealizedGainsLossesOnDisposalOfSubsidiaries us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:NeonCapitalLimited


Realized
Period End2020-12-312020-09-30
Value23-30.0
Percentage of RealizedGainsLossesOnDisposalOfSubsidiaries43.4100.0

afg:RestrictedCommonStockIssuedFairValuePerShare us-gaap:AwardType

afg:RestrictedCommonStockIssuedFairValuePerShare

us-gaap:StockCompensationPlan


Restricted
Period End2021-06-302021-03-31
Value0111.13
Percentage of RestrictedCommonStockIssuedFairValuePerShare0.0100.0

afg:RetirementOfManagedInvestmentEntitiesLiabilities

afg:RetirementOfManagedInvestmentEntitiesLiabilities


Retirement
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value320725129335.0413743.02.03.04722.077768458711636232128536567111-56.00.01884.0523274164133364236709251126711444896.0524.04.03.0
Percentage of RetirementOfManagedInvestmentEntitiesLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:RevenuesBeforeRealizedGainsLosses

afg:RevenuesBeforeRealizedGainsLosses


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value14841432197920451747182620652141190418401928197418021712180218471638157316861703159514931651169515421437152115681380119212991387109810911242129711091043
Percentage of RevenuesBeforeRealizedGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:RevenuesBeforeRealizedGainsLosses us-gaap:StatementBusinessSegments

afg:Annuity


Revenues
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value465494414457484476478462446440439420400401386374373377368341339339328316306307308293291276272262306263257241
Percentage of RevenuesBeforeRealizedGainsLosses23.524.223.725.023.422.225.125.123.122.324.424.522.221.723.623.822.122.123.122.820.520.021.322.020.119.622.324.622.419.924.824.024.620.323.223.1

afg:PropertyAndCasualtyInsurance


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value139413361447149312591307149115711326128013871439127812091318136211651124123412551156108412111258112110311137121210098239311015780756879921717676
Percentage of RevenuesBeforeRealizedGainsLosses93.993.373.173.072.171.672.273.469.669.671.972.970.970.673.173.771.171.573.273.772.572.673.374.272.771.774.877.373.169.071.773.271.069.370.871.064.764.8

us-gaap:CorporateAndOther


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value90966758746290941009895958583727276636758595657494444311.015253046-1.023-7.010.0
Percentage of RevenuesBeforeRealizedGainsLosses6.16.73.42.84.23.44.44.45.35.34.94.84.74.84.03.94.64.04.03.43.73.83.52.92.93.12.00.11.12.12.33.3-0.12.1-0.60.8

afg:SpecialChargesToIncreaseAsbestosAndEnvironmentalReserves us-gaap:StatementBusinessSegments

afg:SpecialChargesToIncreaseAsbestosAndEnvironmentalReserves

us-gaap:CorporateAndOther


Special
Period End2020-09-302019-09-302018-09-302017-09-302016-09-302015-09-302014-09-302013-09-302012-09-302011-06-30
Value21119.0245.0126.0222.09.0
Percentage of SpecialChargesToIncreaseAsbestosAndEnvironmentalReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:StockRepurchasedSharesExchangedInStockCompensationPlansValue

afg:StockRepurchasedSharesExchangedInStockCompensationPlansValue


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2.08.00.00.00.0110.00.01.04.00.01.01.03.02.00.00.03.00.00.00.02.01.00.00.02.01.00.00.01.02.00.00.01.0
Percentage of StockRepurchasedSharesExchangedInStockCompensationPlansValue100.0100.00.00.00.0100.00.00.0100.0100.00.0100.0100.0100.0100.00.00.0100.00.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.0

afg:StockRepurchasedSharesExchangedInStockCompensationPlansValue us-gaap:StatementEquityComponents

us-gaap:CommonStockIncludingAdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.01.00.00.00.02.00.00.00.01.00.01.00.00.01.00.00.00.00.00.00.00.0
Percentage of StockRepurchasedSharesExchangedInStockCompensationPlansValue0.012.50.00.00.018.20.00.00.025.00.0100.00.00.050.00.00.00.00.00.00.00.0

us-gaap:Parent


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2.08.00.00.00.0110.00.01.04.00.01.01.03.02.00.00.03.00.00.00.02.01.00.00.02.01.00.00.01.02.00.00.01.0
Percentage of StockRepurchasedSharesExchangedInStockCompensationPlansValue100.0100.00.00.00.0100.00.00.0100.0100.00.0100.0100.0100.0100.00.00.0100.00.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.0

us-gaap:RetainedEarnings


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2.07.00.00.00.09.00.00.01.03.00.00.01.03.01.00.00.03.0
Percentage of StockRepurchasedSharesExchangedInStockCompensationPlansValue100.087.50.00.00.081.80.00.0100.075.00.00.0100.0100.050.00.00.0100.0

afg:UnderwritingGainLossPropertyAndCasualtyInsurance us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

afg:UnderwritingGainLossPropertyAndCasualtyInsurance

afg:NeonCapitalLimited


Underwriting
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-53000000.0-38000000.0-43000000.0-1000000.0-3000000.0-19000000.0
Percentage of UnderwritingGainLossPropertyAndCasualtyInsurance100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesGrossRealizedGains us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesGrossRealizedGains

us-gaap:FixedMaturities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2.0449212729159.05.06.03.03.010.06.011
Percentage of AvailableForSaleSecuritiesGrossRealizedGains100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesGrossRealizedGains us-gaap:FinancialInstrument, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:FixedMaturities, afg:AnnuitySubsidiaries


Available
Period End2021-03-312020-03-31
Value1826
Percentage of AvailableForSaleSecuritiesGrossRealizedGains900.089.7

us-gaap:AvailableForSaleSecuritiesGrossRealizedLosses us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesGrossRealizedLosses

us-gaap:FixedMaturities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1.0222.0274.07.03.00.09.06.00.05.03.016
Percentage of AvailableForSaleSecuritiesGrossRealizedLosses100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesGrossRealizedLosses us-gaap:FinancialInstrument, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:FixedMaturities, afg:AnnuitySubsidiaries


Available
Period End2021-03-312020-03-31
Value2.03.0
Percentage of AvailableForSaleSecuritiesGrossRealizedLosses200.075.0

us-gaap:CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations

afg:AnnuitySubsidiaries


Cash
Period End2021-06-302021-03-312020-06-302020-03-31
Value46116-206.0612
Percentage of CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations100.0100.0100.0100.0

us-gaap:CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations

afg:AnnuitySubsidiaries


Cash
Period End2021-06-302021-03-312020-06-302020-03-31
Value-975000000.0-734000000.0236000000.0-1244000000.0
Percentage of CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations100.0100.0100.0100.0

us-gaap:CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations

afg:AnnuitySubsidiaries


Cash
Period End2021-06-302021-03-312020-06-302020-03-31
Value-122.0209340265
Percentage of CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded


Debt
Period End2020-12-312020-09-302020-06-302020-03-31
Value1.00.06.014
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded100.00.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded us-gaap:FinancialInstrument

afg:StructuredSecurities


Debt
Period End2020-12-312020-09-302020-06-302020-03-31
Value1.00.02.011
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded100.00.033.378.6

us-gaap:CorporateDebtSecurities


Debt
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.04.03.0
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded0.00.066.721.4

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0-1000000.0-12000000.0-3000000.0-7000000.0
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal0.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal us-gaap:FinancialInstrument

afg:StructuredSecurities


Debt
Period End2021-06-302021-03-312020-09-302020-06-30
Value-1000000.0-1000000.01000000.0-1000000.0
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal0.0100.0-33.314.3

us-gaap:CorporateDebtSecurities


Debt
Period End2021-06-302020-12-312020-09-302020-06-30
Value1000000.0-6000000.0-4000000.0-6000000.0
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal0.050.0133.385.7

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease


Debt
Period End2020-12-312020-09-302020-06-30
Value001000000.0
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease0.00.0100.0

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease us-gaap:FinancialInstrument

afg:StructuredSecurities


Debt
Period End2020-12-312020-09-302020-06-30
Value001000000.0
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease0.00.0100.0

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value1000000.01000000.03000000.04000000.00
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold100.0100.0100.0100.00.0

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold us-gaap:FinancialInstrument

afg:StructuredSecurities


Debt
Period End2020-12-312020-09-302020-06-30
Value01000000.00
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold0.025.00.0

us-gaap:CorporateDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value1000000.01000000.03000000.03000000.00
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold100.0100.0100.075.00.0

us-gaap:DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate

us-gaap:ResidentialMortgageBackedSecurities


Debt
Period End2020-12-31
Value0
Percentage of DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate0.0

us-gaap:DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationAmountAtParValue us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationAmountAtParValue

us-gaap:ResidentialMortgageBackedSecurities


Debt
Period End2020-12-31
Value0
Percentage of DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationAmountAtParValue0.0

us-gaap:DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationAmountAtPurchasePrice us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationAmountAtPurchasePrice

us-gaap:ResidentialMortgageBackedSecurities


Debt
Period End2020-12-31
Value0
Percentage of DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationAmountAtPurchasePrice0.0

us-gaap:DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationDiscountPremium us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationDiscountPremium

us-gaap:ResidentialMortgageBackedSecurities


Debt
Period End2020-12-31
Value0
Percentage of DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationDiscountPremium0.0

us-gaap:DeferredPolicyAcquisitionCostAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfitOrEstimatedGrossMargin us-gaap:StatementBusinessSegments

us-gaap:DeferredPolicyAcquisitionCostAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfitOrEstimatedGrossMargin

afg:AnnuityLongtermCareandLife


Deferred
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302018-06-30
Value0.01180.076-1.00.0-28.0
Percentage of DeferredPolicyAcquisitionCostAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfitOrEstimatedGrossMargin0.0100.00.0100.0100.00.0100.0

us-gaap:DeferredPolicyAcquisitionCostAmortizationExpenseNetInvestmentGainsLosses us-gaap:StatementBusinessSegments

us-gaap:DeferredPolicyAcquisitionCostAmortizationExpenseNetInvestmentGainsLosses

afg:AnnuityLongtermCareandLife


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value482.02.0-10.0-3.0-3.00.0-2.0-5.0-3.0-3.0-3.0-3.0-4.00.0-2.0-1.0-1.0-2.0-2.0-2.0-3.0-1.0-2.00.0-1.0-1.0
Percentage of DeferredPolicyAcquisitionCostAmortizationExpenseNetInvestmentGainsLosses100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:DeferredPolicyAcquisitionCostAmortizationExpenseOther us-gaap:StatementBusinessSegments

us-gaap:DeferredPolicyAcquisitionCostAmortizationExpenseOther

afg:AnnuityLongtermCareandLife


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value4039-50.09857291915455866693944364270423225423655
Percentage of DeferredPolicyAcquisitionCostAmortizationExpenseOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:PropertyAndCasualtyInsurance


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value115170160170177194175175159171160154143142136135124134128134123132130
Percentage of DeferredPolicyAcquisitionCostAmortizationExpenseOther287.5435.9-320.0173.5310.5669.0921.11166.7353.3294.8242.4223.2366.7322.7377.8321.4177.1319.0400.0536.0292.9366.7236.4

us-gaap:DeferredPolicyAcquisitionCostForeignCurrencyTranslationAdjustmentAndOther us-gaap:StatementBusinessSegments

us-gaap:DeferredPolicyAcquisitionCostForeignCurrencyTranslationAdjustmentAndOther

afg:PropertyAndCasualtyInsurance


Deferred
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-30
Value1000000.0-2000000.001000000.0-1000000.0-1000000.01000000.0-1000000.00-2000000.01000000.0-2000000.01000000.001000000.0-1000000.0-1000000.0-1000000.0-1000000.0-2000000.0-1000000.0
Percentage of DeferredPolicyAcquisitionCostForeignCurrencyTranslationAdjustmentAndOther100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredPolicyAcquisitionCostsAdditions us-gaap:StatementBusinessSegments

us-gaap:DeferredPolicyAcquisitionCostsAdditions

afg:AnnuityLongtermCareandLife


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value423330494343566471657057484466675848566860744644544252507465
Percentage of DeferredPolicyAcquisitionCostsAdditions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

afg:PropertyAndCasualtyInsurance


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value99142148158175188194187151181181162149149151139132132139132123138137121117129127124108118123119104113118103
Percentage of DeferredPolicyAcquisitionCostsAdditions235.7430.3493.3322.4407.0437.2346.4292.2212.7278.5258.6284.2310.4338.6228.8207.5227.6275.0248.2194.1205.0186.5297.8275.0216.7307.1244.2248.0145.9181.50.00.00.00.00.00.0

us-gaap:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAdditions

us-gaap:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAdditions


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value142175178208218232250252222247252219198194218207191181197205187215184168173172180178185187174155139165194167
Percentage of DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAdditions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAdditions us-gaap:StatementBusinessSegments

afg:AnnuityLongtermCareandLife


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value433330504344566571667157494567685949587364774747564353547769
Percentage of DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAdditions30.318.916.924.019.719.022.425.832.026.728.226.024.723.230.732.930.927.129.435.634.235.825.528.032.425.029.430.341.636.9

us-gaap:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1

us-gaap:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value160212112273238227200195209236233230189192178185203185168166173177195165154175165158150162174158171151154150181140150
Percentage of DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1 us-gaap:StatementBusinessSegments

afg:AnnuityLongtermCareandLife


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value4542-48.01036133252050657376465042507951403250456539404842374643
Percentage of DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization128.119.8-42.937.725.614.512.510.323.927.531.333.024.326.023.627.038.927.623.819.328.925.433.323.626.027.425.523.430.726.5

us-gaap:DeferredSalesInducementsAdditions us-gaap:StatementBusinessSegments

us-gaap:DeferredSalesInducementsAdditions

afg:AnnuityLongtermCareandLife


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1.00.00.01.00.01.00.01.00.01.01.00.01.01.01.01.01.01.02.05.04.03.01.03.02.01.01.04.03.04.0
Percentage of DeferredSalesInducementsAdditions100.00.00.0100.00.0100.00.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredSalesInducementsAmortizationExpense us-gaap:StatementBusinessSegments

us-gaap:DeferredSalesInducementsAmortizationExpense

afg:AnnuityLongtermCareandLife


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value3.02.01.03.03.03.04.03.04.05.05.05.05.04.04.06.07.06.06.05.06.06.07.07.06.07.06.07.07.08.0
Percentage of DeferredSalesInducementsAmortizationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAmortizationAndAccretionNet

us-gaap:DepreciationAmortizationAndAccretionNet


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value349951169-34.0113641233834475735712.0363138433825281434533149383027323243351393537465343445273445047
Percentage of DepreciationAmortizationAndAccretionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation

us-gaap:DerivativeGainLossOnDerivativeNet

afg:FixedIndexedandVariableIndexedAnnuitiesEmbeddedDerivatives, us-gaap:Nondesignated, afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Derivative
Period End2021-06-302021-03-312020-06-302020-03-31
Value-182.0-40.0-601.0647
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0

afg:MortgageBackedSecuritiesWithEmbeddedDerivatives, us-gaap:Nondesignated, afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Derivative
Period End2021-06-302020-06-302020-03-31
Value-1.02.03.0
Percentage of DerivativeGainLossOnDerivativeNet0.5-0.30.5

us-gaap:CallOption, us-gaap:Nondesignated, afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Derivative
Period End2021-06-302021-03-312020-06-302020-03-31
Value123114383-628.0
Percentage of DerivativeGainLossOnDerivativeNet-67.6-285.0-63.7-97.1

us-gaap:OtherContract, us-gaap:Nondesignated, afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Derivative
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.01.0-3.02.0
Percentage of DerivativeGainLossOnDerivativeNet-0.0-2.50.50.3

us-gaap:PutOption, us-gaap:Nondesignated, afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Derivative
Period End2021-06-302021-03-312020-06-302020-03-31
Value3.02.05.0-6.0
Percentage of DerivativeGainLossOnDerivativeNet-1.6-5.0-0.8-0.9

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

afg:FixedIndexedandVariableIndexedAnnuitiesEmbeddedDerivatives, us-gaap:Nondesignated, afg:Annuitybenefits


Derivative
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value-5.0-601.064770-251.0-462.0-223.0-126.063-127.0-112.0
Percentage of DerivativeGainLossOnDerivativeNet0.0100.0100.00.00.00.00.00.00.00.00.0

afg:MortgageBackedSecuritiesWithEmbeddedDerivatives, us-gaap:Nondesignated, afg:RealizedGainsLossesOnSecurities


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value-2.0-5.0-5.03.04.0-5.03.06.06.01.0-3.0-1.0-4.0-3.00.0-3.00.0-9.0-4.03.01.0-9.0-4.0-1.0-2.0-4.00.04.03.0-3.01.0-3.02.01.01.0
Percentage of DerivativeGainLossOnDerivativeNet5.00.00.0-0.50.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CallOption, us-gaap:Nondesignated, afg:Annuitybenefits


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value265203383-628.026030148366-569.021990-38.0156116811416010516
Percentage of DerivativeGainLossOnDerivativeNet0.00.0-63.7-97.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherContract, us-gaap:Nondesignated, us-gaap:InvestmentIncome


Derivative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value1.0-3.02.00.00.0-1.0-1.00.00.01.01.00.00.0-1.0-1.05.00.0-3.0-3.02.01.03.00.0-1.01.0-1.0-2.00.02.04.01.01.0-4.0
Percentage of DerivativeGainLossOnDerivativeNet0.00.50.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PutOption, us-gaap:Nondesignated, afg:Annuitybenefits


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2.02.05.0-6.01.00.00.01.0-1.00.00.00.00.00.00.0
Percentage of DerivativeGainLossOnDerivativeNet0.00.0-0.8-0.90.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:HedgingDesignation

us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value-57.075-63.0196-213.019-20.0102-98.0-90.0-82.0-6.0-36.021-49.0-12.0-35.0-7.033-7.0-45.0-61.0-35.0-40.024-32.037-1.0-13.0-26.0122.0202.041-13.0
Percentage of DerivativeGainLossOnDerivativeNet31.3-187.50.00.035.42.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value8.011124.00.01.0-2.0-1.0-1.0-2.01.02.01.01.02.02.02.01.02.02.02.01.01.0
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax

afg:AnnuitySubsidiaries


Discontinued
Period End2021-05-31
Value906
Percentage of DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax100.0

us-gaap:DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax

afg:AnnuitySubsidiaries


Discontinued
Period End2021-05-31
Value697
Percentage of DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax100.0

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax

afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Discontinued
Period End2021-05-312021-03-312020-06-302020-03-31
Value8324178-203.0
Percentage of DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax100.0100.0100.0100.0

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare


Discontinued
Period End2021-06-302021-03-312020-06-302020-03-31
Value8.951.770.72-1.77
Percentage of DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare100.0100.0100.0100.0

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare


Discontinued
Period End2021-06-302021-03-312020-06-302020-03-31
Value8.891.760.71-1.77
Percentage of DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare100.0100.0100.0100.0

us-gaap:DiscontinuedOperationTaxEffectOfDiscontinuedOperation us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation

us-gaap:DiscontinuedOperationTaxEffectOfDiscontinuedOperation

afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Discontinued
Period End2021-05-312021-03-312020-06-302020-03-31
Value184814-43.0
Percentage of DiscontinuedOperationTaxEffectOfDiscontinuedOperation100.0100.0100.0100.0

us-gaap:DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation

afg:AnnuitySubsidiaries


Discontinued
Period End2021-05-31
Value250
Percentage of DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationOperatingExpense us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation

us-gaap:DisposalGroupIncludingDiscontinuedOperationOperatingExpense

afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Disposal
Period End2021-05-312021-03-312020-06-302020-03-31
Value267319432428
Percentage of DisposalGroupIncludingDiscontinuedOperationOperatingExpense100.0100.0100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherExpense us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherExpense

afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Disposal
Period End2021-05-312021-03-312020-06-302020-03-31
Value27464139
Percentage of DisposalGroupIncludingDiscontinuedOperationOtherExpense100.0100.0100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherIncome us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherIncome

afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Disposal
Period End2021-05-312021-03-312020-06-302020-03-31
Value20323233
Percentage of DisposalGroupIncludingDiscontinuedOperationOtherIncome100.0100.0100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation

us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue

afg:AnnuitySubsidiaries, us-gaap:SegmentDiscontinuedOperations


Disposal
Period End2021-05-312021-03-312020-06-302020-03-31
Value350560510225
Percentage of DisposalGroupIncludingDiscontinuedOperationRevenue100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1232432163941402043617036170311653120727160271142524241122222221102020191091817174117161718161816-110.0151516
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:Parent


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1232432163941402043617036170311653120727160271142524241122222221102020191091817174117161718161816-110.0151516
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value123243216394140204361703617031165312072716027
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance

us-gaap:EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance


Effective
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value1.072.015.00.04-0.010.010.02000.0200.010-0.050.550.01-0.01-0.020.040.240.010.020.080-0.030-0.010.020.01
Percentage of EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.00.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsDividends

us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsDividends


Effective
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1.00000.01000.0100000.070.010.0100.010.01
Percentage of EffectiveIncomeTaxRateReconciliationDeductionsDividends100.00.00.00.0100.00.00.0100.00.00.00.00.0100.0100.0100.00.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends

us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends


Effective
Period End2021-06-302020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-30
Value3.01.000000.01000.0100.01000
Percentage of EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends100.0100.00.00.00.00.0100.00.00.0100.00.0100.00.00.00.0

us-gaap:EffectiveIncomeTaxRateReconciliationDispositionOfBusiness

us-gaap:EffectiveIncomeTaxRateReconciliationDispositionOfBusiness


Effective
Period End2020-09-30
Value-54.0
Percentage of EffectiveIncomeTaxRateReconciliationDispositionOfBusiness100.0

us-gaap:EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential

us-gaap:EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential


Effective
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value10.0-3.00000000000.020.010.0300.03
Percentage of EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential100.0100.00.00.00.00.00.00.00.00.00.0100.0100.0100.00.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpense

us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpense


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.01.012.01.00-0.0100.010.010000.010.0100.0700.01
Percentage of EffectiveIncomeTaxRateReconciliationNondeductibleExpense100.0100.0100.0100.00.0100.00.0100.0100.00.00.00.0100.0100.00.0100.00.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost

us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost


Effective
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-3.0-1.010.9800.010-0.01-0.01000-0.01-0.030.01-0.03-0.03-0.03-0.01000
Percentage of EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost100.0100.0100.00.0100.00.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments

us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments


Effective
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value1.06.03.0-0.010.010.010.01-0.010.010.010.01000-0.010.010.0200-0.020.010-0.040.020.05-0.01-0.020.030.0100.010.010.01-0.0100.02
Percentage of EffectiveIncomeTaxRateReconciliationOtherAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes

us-gaap:EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes


Effective
Period End2020-09-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-30
Value-1.00-0.020-0.040-0.07
Percentage of EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes100.00.0100.00.0100.00.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationTaxExemptIncome

us-gaap:EffectiveIncomeTaxRateReconciliationTaxExemptIncome


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value1.01.026.02.00.01-0.0100.020.010.010.010.010.020.02-0.010.170.030.03-0.010.030.040.04-0.010.060.030.2300.040.050.03-0.010.030.050.030.010.020.04
Percentage of EffectiveIncomeTaxRateReconciliationTaxExemptIncome100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiGainLoss us-gaap:IncomeStatementLocation

us-gaap:EquitySecuritiesFvNiGainLoss

us-gaap:InvestmentIncome


Equity
Period End2021-06-302020-06-30
Value8.09.0
Percentage of EquitySecuritiesFvNiGainLoss100.0100.0

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss


Equity
Period End2021-06-302020-06-30
Value4495
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss100.0100.0

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss us-gaap:IncomeStatementLocation

afg:RealizedGainsLossesOnSecurities


Equity
Period End2021-06-302020-06-30
Value3686
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss81.890.5

us-gaap:InvestmentIncome


Equity
Period End2021-06-302020-06-30
Value8.09.0
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss18.29.5

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value3012616-13.0-2.0-43.0-10.0-8.04.04.0-16.0-6.014-13.0-6.0-15.0-13.0-5.0-7.00.0-8.0-20.0-11.0-6.0-11.0-3.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1 us-gaap:FairValueByAssetClass

afg:AssetsOfManagedInvestmentEntities


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-30
Value-1.04.0-2.0-2.0-1.0-1.0-2.0-1.0-1.0-1.0-2.0-1.0-3.0-2.0-1.0-4.0-5.0-1.0-3.0-2.0-2.0-2.0-2.0-3.0-4.0-2.0-1.00.0-1.0-1.0-2.00.01.0-4.00.00.0-1.0-6.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1-3.33.2-12.515.450.02.320.012.5-25.0-25.012.516.7-21.415.416.726.738.520.042.90.025.010.018.250.036.466.70.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AssetBackedSecurities


Fair
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-1.0-2.00.0-14.00.00.00.0-3.0-1.00.00.0-2.02.0-2.00.00.00.0-1.00.00.00.00.01.00.00.00.03.00.01.00.02.01.01.01.04.01.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1-6.215.4-0.032.6-0.0-0.00.0-75.06.2-0.00.015.4-33.313.3-0.0-0.0-0.00.0-0.0-0.0-0.0-0.0-9.1-0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CollateralizedLoanObligations


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.01.06.0-1.0-3.0-7.00.0-2.00.00.0-1.00.00.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings10.00.837.57.7150.016.3-0.025.00.00.06.2-0.00.0

us-gaap:CommercialMortgageBackedSecurities


Fair
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30