00015274692020Q312/31falseus-gaap:AccountingStandardsUpdate201613Member00015274692020-01-012020-09-300001527469us-gaap:CommonClassAMember2020-01-012020-09-300001527469us-gaap:SeriesAPreferredStockMember2020-01-012020-09-300001527469us-gaap:SeriesBPreferredStockMember2020-01-012020-09-300001527469us-gaap:SeriesCPreferredStockMember2020-01-012020-09-30xbrli:shares00015274692020-10-31iso4217:USD00015274692020-09-3000015274692019-12-310001527469us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2020-09-300001527469us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469srt:AffiliatedEntityMember2020-09-300001527469srt:AffiliatedEntityMember2019-12-310001527469us-gaap:VariableInterestEntityPrimaryBeneficiaryMembersrt:AffiliatedEntityMember2020-09-300001527469us-gaap:VariableInterestEntityPrimaryBeneficiaryMembersrt:AffiliatedEntityMember2019-12-310001527469srt:AffiliatedEntityMember2019-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-31iso4217:USDxbrli:shares0001527469us-gaap:SeriesAPreferredStockMember2019-12-310001527469us-gaap:SeriesAPreferredStockMember2020-09-300001527469us-gaap:SeriesBPreferredStockMember2019-12-310001527469us-gaap:SeriesBPreferredStockMember2020-09-300001527469us-gaap:SeriesCPreferredStockMember2020-09-300001527469us-gaap:SeriesCPreferredStockMember2019-12-310001527469us-gaap:CommonClassAMember2019-12-310001527469us-gaap:CommonClassAMember2020-09-300001527469us-gaap:CommonClassBMember2020-09-300001527469us-gaap:CommonClassBMember2019-12-310001527469ahl:CommonClassM1Member2020-09-300001527469ahl:CommonClassM1Member2019-12-310001527469ahl:CommonClassM2Member2019-12-310001527469ahl:CommonClassM2Member2020-09-300001527469ahl:CommonClassM3Member2019-12-310001527469ahl:CommonClassM3Member2020-09-300001527469ahl:CommonClassM4Member2019-12-310001527469ahl:CommonClassM4Member2020-09-300001527469srt:AffiliatedEntityMember2020-07-012020-09-300001527469srt:AffiliatedEntityMember2019-07-012019-09-300001527469srt:AffiliatedEntityMember2020-01-012020-09-300001527469srt:AffiliatedEntityMember2019-01-012019-09-3000015274692020-07-012020-09-3000015274692019-07-012019-09-3000015274692019-01-012019-09-300001527469us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2020-07-012020-09-300001527469us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2019-07-012019-09-300001527469us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2020-01-012020-09-300001527469us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2019-01-012019-09-300001527469us-gaap:CommonClassAMember2020-07-012020-09-300001527469us-gaap:CommonClassAMember2019-07-012019-09-300001527469us-gaap:CommonClassAMember2019-01-012019-09-300001527469ahl:CommonClassM4Member2019-07-012019-09-300001527469ahl:CommonClassM1Member2019-07-012019-09-300001527469ahl:CommonClassM3Member2019-07-012019-09-300001527469ahl:CommonClassM2Member2019-07-012019-09-300001527469us-gaap:CommonClassBMember2019-07-012019-09-300001527469ahl:CommonClassM3Member2020-01-012020-09-300001527469ahl:CommonClassM1Member2020-01-012020-09-300001527469ahl:CommonClassM4Member2020-01-012020-09-300001527469ahl:CommonClassM2Member2020-01-012020-09-300001527469us-gaap:CommonClassBMember2020-01-012020-09-300001527469ahl:CommonClassM2Member2019-01-012019-09-300001527469ahl:CommonClassM4Member2019-01-012019-09-300001527469ahl:CommonClassM3Member2019-01-012019-09-300001527469ahl:CommonClassM1Member2019-01-012019-09-300001527469us-gaap:CommonClassBMember2019-01-012019-09-300001527469us-gaap:PreferredStockMember2020-06-300001527469us-gaap:CommonStockMember2020-06-300001527469us-gaap:AdditionalPaidInCapitalMember2020-06-300001527469us-gaap:RetainedEarningsMember2020-06-300001527469us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-06-300001527469us-gaap:ParentMember2020-06-300001527469us-gaap:NoncontrollingInterestMember2020-06-3000015274692020-06-300001527469us-gaap:RetainedEarningsMember2020-07-012020-09-300001527469us-gaap:ParentMember2020-07-012020-09-300001527469us-gaap:NoncontrollingInterestMember2020-07-012020-09-300001527469us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-07-012020-09-300001527469us-gaap:AdditionalPaidInCapitalMember2020-07-012020-09-300001527469us-gaap:PreferredStockMember2020-09-300001527469us-gaap:CommonStockMember2020-09-300001527469us-gaap:AdditionalPaidInCapitalMember2020-09-300001527469us-gaap:RetainedEarningsMember2020-09-300001527469us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-09-300001527469us-gaap:ParentMember2020-09-300001527469us-gaap:NoncontrollingInterestMember2020-09-300001527469us-gaap:PreferredStockMember2019-06-300001527469us-gaap:CommonStockMember2019-06-300001527469us-gaap:AdditionalPaidInCapitalMember2019-06-300001527469us-gaap:RetainedEarningsMember2019-06-300001527469us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-06-300001527469us-gaap:ParentMember2019-06-300001527469us-gaap:NoncontrollingInterestMember2019-06-3000015274692019-06-300001527469us-gaap:RetainedEarningsMember2019-07-012019-09-300001527469us-gaap:ParentMember2019-07-012019-09-300001527469us-gaap:NoncontrollingInterestMember2019-07-012019-09-300001527469us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-07-012019-09-300001527469us-gaap:PreferredStockMemberus-gaap:AdditionalPaidInCapitalMember2019-07-012019-09-300001527469us-gaap:ParentMemberus-gaap:PreferredStockMember2019-07-012019-09-300001527469us-gaap:PreferredStockMember2019-07-012019-09-300001527469us-gaap:AdditionalPaidInCapitalMemberus-gaap:CommonStockMember2019-07-012019-09-300001527469us-gaap:ParentMemberus-gaap:CommonStockMember2019-07-012019-09-300001527469us-gaap:CommonStockMember2019-07-012019-09-300001527469us-gaap:AdditionalPaidInCapitalMember2019-07-012019-09-300001527469us-gaap:PreferredStockMember2019-09-300001527469us-gaap:CommonStockMember2019-09-300001527469us-gaap:AdditionalPaidInCapitalMember2019-09-300001527469us-gaap:RetainedEarningsMember2019-09-300001527469us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-09-300001527469us-gaap:ParentMember2019-09-300001527469us-gaap:NoncontrollingInterestMember2019-09-3000015274692019-09-300001527469us-gaap:PreferredStockMember2019-12-310001527469us-gaap:CommonStockMember2019-12-310001527469us-gaap:AdditionalPaidInCapitalMember2019-12-310001527469us-gaap:RetainedEarningsMember2019-12-310001527469us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-12-310001527469us-gaap:ParentMember2019-12-310001527469us-gaap:NoncontrollingInterestMember2019-12-310001527469us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-12-310001527469us-gaap:AccumulatedOtherComprehensiveIncomeMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-12-310001527469us-gaap:ParentMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-12-310001527469us-gaap:NoncontrollingInterestMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-12-310001527469srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-12-310001527469us-gaap:RetainedEarningsMember2020-01-012020-09-300001527469us-gaap:ParentMember2020-01-012020-09-300001527469us-gaap:NoncontrollingInterestMember2020-01-012020-09-300001527469us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-01-012020-09-300001527469us-gaap:PreferredStockMemberus-gaap:AdditionalPaidInCapitalMember2020-01-012020-09-300001527469us-gaap:ParentMemberus-gaap:PreferredStockMember2020-01-012020-09-300001527469us-gaap:PreferredStockMember2020-01-012020-09-300001527469us-gaap:AdditionalPaidInCapitalMemberus-gaap:CommonStockMember2020-01-012020-09-300001527469us-gaap:ParentMemberus-gaap:CommonStockMember2020-01-012020-09-300001527469us-gaap:CommonStockMember2020-01-012020-09-300001527469us-gaap:AdditionalPaidInCapitalMember2020-01-012020-09-300001527469srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-01-012020-09-300001527469us-gaap:PreferredStockMember2018-12-310001527469us-gaap:CommonStockMember2018-12-310001527469us-gaap:AdditionalPaidInCapitalMember2018-12-310001527469us-gaap:RetainedEarningsMember2018-12-310001527469us-gaap:AccumulatedOtherComprehensiveIncomeMember2018-12-310001527469us-gaap:ParentMember2018-12-310001527469us-gaap:NoncontrollingInterestMember2018-12-3100015274692018-12-310001527469us-gaap:RetainedEarningsMember2019-01-012019-09-300001527469us-gaap:ParentMember2019-01-012019-09-300001527469us-gaap:NoncontrollingInterestMember2019-01-012019-09-300001527469us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-01-012019-09-300001527469us-gaap:PreferredStockMemberus-gaap:AdditionalPaidInCapitalMember2019-01-012019-09-300001527469us-gaap:ParentMemberus-gaap:PreferredStockMember2019-01-012019-09-300001527469us-gaap:PreferredStockMember2019-01-012019-09-300001527469us-gaap:AdditionalPaidInCapitalMemberus-gaap:CommonStockMember2019-01-012019-09-300001527469us-gaap:ParentMemberus-gaap:CommonStockMember2019-01-012019-09-300001527469us-gaap:CommonStockMember2019-01-012019-09-300001527469us-gaap:AdditionalPaidInCapitalMember2019-01-012019-09-300001527469srt:AffiliatedEntityMemberus-gaap:EquitySecuritiesMember2020-01-012020-09-300001527469srt:AffiliatedEntityMemberus-gaap:EquitySecuritiesMember2019-01-012019-09-300001527469ahl:ReinsuranceSettlementsMember2020-01-012020-09-300001527469ahl:ReinsuranceSettlementsMember2019-01-012019-09-300001527469srt:AffiliatedEntityMemberahl:ReinsuranceSettlementsMember2020-01-012020-09-300001527469srt:AffiliatedEntityMemberahl:ReinsuranceSettlementsMember2019-01-012019-09-300001527469ahl:PensionRiskTransferPremiumsMember2020-01-012020-09-300001527469ahl:PensionRiskTransferPremiumsMember2019-01-012019-09-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMember2020-01-012020-09-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMember2019-01-012019-09-300001527469srt:AffiliatedEntityMemberahl:InvestmentFundsMember2020-01-012020-09-300001527469srt:AffiliatedEntityMemberahl:InvestmentFundsMember2019-01-012019-09-3000015274692020-01-012020-01-01xbrli:pure0001527469us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-01-010001527469srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-01-010001527469srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-01-010001527469us-gaap:USTreasuryAndGovernmentMember2020-09-300001527469us-gaap:USStatesAndPoliticalSubdivisionsMember2020-09-300001527469us-gaap:ForeignGovernmentDebtSecuritiesMember2020-09-300001527469us-gaap:CorporateDebtSecuritiesMember2020-09-300001527469us-gaap:CollateralizedDebtObligationsMember2020-09-300001527469us-gaap:AssetBackedSecuritiesMember2020-09-300001527469us-gaap:CommercialMortgageBackedSecuritiesMember2020-09-300001527469us-gaap:ResidentialMortgageBackedSecuritiesMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:CorporateDebtSecuritiesMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:CollateralizedDebtObligationsMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2020-09-300001527469ahl:InvestmentsincludingrelatedpartyMember2020-09-300001527469us-gaap:USTreasuryAndGovernmentMember2019-12-310001527469us-gaap:AccumulatedOtherThanTemporaryImpairmentMemberus-gaap:USTreasuryAndGovernmentMember2019-12-310001527469us-gaap:USStatesAndPoliticalSubdivisionsMember2019-12-310001527469us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:AccumulatedOtherThanTemporaryImpairmentMember2019-12-310001527469us-gaap:ForeignGovernmentDebtSecuritiesMember2019-12-310001527469us-gaap:AccumulatedOtherThanTemporaryImpairmentMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2019-12-310001527469us-gaap:CorporateDebtSecuritiesMember2019-12-310001527469us-gaap:AccumulatedOtherThanTemporaryImpairmentMemberus-gaap:CorporateDebtSecuritiesMember2019-12-310001527469us-gaap:CollateralizedDebtObligationsMember2019-12-310001527469us-gaap:AccumulatedOtherThanTemporaryImpairmentMemberus-gaap:CollateralizedDebtObligationsMember2019-12-310001527469us-gaap:AssetBackedSecuritiesMember2019-12-310001527469us-gaap:AccumulatedOtherThanTemporaryImpairmentMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469us-gaap:CommercialMortgageBackedSecuritiesMember2019-12-310001527469us-gaap:AccumulatedOtherThanTemporaryImpairmentMemberus-gaap:CommercialMortgageBackedSecuritiesMember2019-12-310001527469us-gaap:ResidentialMortgageBackedSecuritiesMember2019-12-310001527469us-gaap:AccumulatedOtherThanTemporaryImpairmentMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2019-12-310001527469us-gaap:AccumulatedOtherThanTemporaryImpairmentMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:CorporateDebtSecuritiesMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:CollateralizedDebtObligationsMember2019-12-310001527469us-gaap:AccumulatedOtherThanTemporaryImpairmentMembersrt:AffiliatedEntityMemberus-gaap:CollateralizedDebtObligationsMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469us-gaap:AccumulatedOtherThanTemporaryImpairmentMembersrt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469us-gaap:AccumulatedOtherThanTemporaryImpairmentMembersrt:AffiliatedEntityMember2019-12-310001527469ahl:InvestmentsincludingrelatedpartyMember2019-12-310001527469ahl:InvestmentsincludingrelatedpartyMemberus-gaap:AccumulatedOtherThanTemporaryImpairmentMember2019-12-31ahl:security0001527469us-gaap:CorporateDebtSecuritiesMember2020-06-300001527469us-gaap:CorporateDebtSecuritiesMember2020-07-012020-09-300001527469us-gaap:CollateralizedDebtObligationsMember2020-06-300001527469us-gaap:CollateralizedDebtObligationsMember2020-07-012020-09-300001527469us-gaap:AssetBackedSecuritiesMember2020-06-300001527469us-gaap:AssetBackedSecuritiesMember2020-07-012020-09-300001527469us-gaap:CommercialMortgageBackedSecuritiesMember2020-06-300001527469us-gaap:CommercialMortgageBackedSecuritiesMember2020-07-012020-09-300001527469us-gaap:ResidentialMortgageBackedSecuritiesMember2020-06-300001527469us-gaap:ResidentialMortgageBackedSecuritiesMember2020-07-012020-09-300001527469srt:AffiliatedEntityMemberus-gaap:CollateralizedDebtObligationsMember2020-06-300001527469srt:AffiliatedEntityMemberus-gaap:CollateralizedDebtObligationsMember2020-07-012020-09-300001527469srt:AffiliatedEntityMember2020-06-300001527469ahl:InvestmentsincludingrelatedpartyMember2020-06-300001527469ahl:InvestmentsincludingrelatedpartyMember2020-07-012020-09-300001527469us-gaap:CorporateDebtSecuritiesMember2020-01-010001527469us-gaap:CorporateDebtSecuritiesMember2020-01-012020-09-300001527469us-gaap:CollateralizedDebtObligationsMember2020-01-012020-09-300001527469us-gaap:AssetBackedSecuritiesMember2020-01-010001527469us-gaap:AssetBackedSecuritiesMember2020-01-012020-09-300001527469us-gaap:CommercialMortgageBackedSecuritiesMember2020-01-010001527469us-gaap:CommercialMortgageBackedSecuritiesMember2020-01-012020-09-300001527469us-gaap:ResidentialMortgageBackedSecuritiesMember2020-01-010001527469us-gaap:ResidentialMortgageBackedSecuritiesMember2020-01-012020-09-3000015274692020-01-010001527469srt:AffiliatedEntityMemberus-gaap:CollateralizedDebtObligationsMember2020-01-010001527469srt:AffiliatedEntityMemberus-gaap:CollateralizedDebtObligationsMember2020-01-012020-09-300001527469ahl:InvestmentsincludingrelatedpartyMember2020-01-010001527469ahl:InvestmentsincludingrelatedpartyMember2020-01-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2020-07-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2019-07-012019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMember2020-01-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMember2019-01-012019-09-300001527469ahl:DebtSecuritiesTradingMembersrt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2020-07-012020-09-300001527469ahl:DebtSecuritiesTradingMembersrt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2019-07-012019-09-300001527469ahl:DebtSecuritiesTradingMember2020-01-012020-09-300001527469ahl:DebtSecuritiesTradingMember2019-01-012019-09-300001527469us-gaap:EquitySecuritiesMembersrt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2020-07-012020-09-300001527469us-gaap:EquitySecuritiesMembersrt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2019-07-012019-09-300001527469us-gaap:EquitySecuritiesMember2020-01-012020-09-300001527469us-gaap:EquitySecuritiesMember2019-01-012019-09-300001527469us-gaap:MortgagesMembersrt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2020-07-012020-09-300001527469us-gaap:MortgagesMembersrt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2019-07-012019-09-300001527469us-gaap:MortgagesMember2020-01-012020-09-300001527469us-gaap:MortgagesMember2019-01-012019-09-300001527469srt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMemberahl:InvestmentFundsMember2020-07-012020-09-300001527469srt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMemberahl:InvestmentFundsMember2019-07-012019-09-300001527469ahl:InvestmentFundsMember2020-01-012020-09-300001527469ahl:InvestmentFundsMember2019-01-012019-09-300001527469ahl:FundsWithheldatInterestMembersrt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2020-07-012020-09-300001527469ahl:FundsWithheldatInterestMembersrt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2019-07-012019-09-300001527469ahl:FundsWithheldatInterestMember2020-01-012020-09-300001527469ahl:FundsWithheldatInterestMember2019-01-012019-09-300001527469us-gaap:OtherInvestmentsMembersrt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2020-07-012020-09-300001527469us-gaap:OtherInvestmentsMembersrt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2019-07-012019-09-300001527469us-gaap:OtherInvestmentsMember2020-01-012020-09-300001527469us-gaap:OtherInvestmentsMember2019-01-012019-09-300001527469srt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2020-07-012020-09-300001527469srt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2019-07-012019-09-300001527469srt:AffiliatedEntityMembersrt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2020-07-012020-09-300001527469srt:AffiliatedEntityMembersrt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember2019-07-012019-09-300001527469us-gaap:MortgagesMember2020-07-012020-09-300001527469us-gaap:MaturityOvernightAndOnDemandMember2020-09-300001527469us-gaap:MaturityUpTo30DaysMember2020-09-300001527469us-gaap:Maturity30To90DaysMember2020-09-300001527469ahl:A90Daysto1YearMember2020-09-300001527469ahl:MaturityGreaterthan1YearMember2020-09-300001527469us-gaap:MaturityOvernightAndOnDemandMember2019-12-310001527469us-gaap:MaturityUpTo30DaysMember2019-12-310001527469us-gaap:Maturity30To90DaysMember2019-12-310001527469ahl:A90Daysto1YearMember2019-12-310001527469ahl:MaturityGreaterthan1YearMember2019-12-310001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CorporateDebtSecuritiesMember2020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CorporateDebtSecuritiesMember2019-12-310001527469ahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469ahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469ahl:CommercialMortgageLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469ahl:CommercialMortgageLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469us-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469us-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469us-gaap:ResidentialMortgageMember2020-09-300001527469us-gaap:ResidentialMortgageMember2019-12-310001527469srt:OfficeBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469srt:OfficeBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMemberahl:PropertyTypeConcentrationRiskMember2020-06-302020-06-300001527469srt:OfficeBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469srt:OfficeBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMemberahl:PropertyTypeConcentrationRiskMember2019-12-312019-12-310001527469srt:RetailSiteMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469srt:RetailSiteMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMemberahl:PropertyTypeConcentrationRiskMember2020-06-302020-06-300001527469srt:RetailSiteMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469srt:RetailSiteMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMemberahl:PropertyTypeConcentrationRiskMember2019-12-312019-12-310001527469srt:ApartmentBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469srt:ApartmentBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMemberahl:PropertyTypeConcentrationRiskMember2020-06-302020-06-300001527469srt:ApartmentBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469srt:ApartmentBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMemberahl:PropertyTypeConcentrationRiskMember2019-12-312019-12-310001527469us-gaap:CommercialRealEstatePortfolioSegmentMembersrt:HotelMember2020-09-300001527469us-gaap:CommercialRealEstatePortfolioSegmentMembersrt:HotelMemberahl:MortgageLoansNetMemberahl:PropertyTypeConcentrationRiskMember2020-06-302020-06-300001527469us-gaap:CommercialRealEstatePortfolioSegmentMembersrt:HotelMember2019-12-310001527469us-gaap:CommercialRealEstatePortfolioSegmentMembersrt:HotelMemberahl:MortgageLoansNetMemberahl:PropertyTypeConcentrationRiskMember2019-12-312019-12-310001527469srt:IndustrialPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469srt:IndustrialPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMemberahl:PropertyTypeConcentrationRiskMember2020-06-302020-06-300001527469srt:IndustrialPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469srt:IndustrialPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMemberahl:PropertyTypeConcentrationRiskMember2019-12-312019-12-310001527469srt:OtherPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469srt:OtherPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMemberahl:PropertyTypeConcentrationRiskMember2020-06-302020-06-300001527469srt:OtherPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469srt:OtherPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMemberahl:PropertyTypeConcentrationRiskMember2019-12-312019-12-310001527469us-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMemberahl:PropertyTypeConcentrationRiskMember2020-06-302020-06-300001527469us-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMemberahl:PropertyTypeConcentrationRiskMember2019-12-312019-12-310001527469ahl:U.SEastNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469ahl:U.SEastNorthCentralMemberus-gaap:GeographicConcentrationRiskMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469ahl:U.SEastNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469ahl:U.SEastNorthCentralMemberus-gaap:GeographicConcentrationRiskMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469ahl:U.S.EastSouthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469us-gaap:GeographicConcentrationRiskMemberahl:U.S.EastSouthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469ahl:U.S.EastSouthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469us-gaap:GeographicConcentrationRiskMemberahl:U.S.EastSouthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469ahl:U.S.MiddleAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469us-gaap:GeographicConcentrationRiskMemberahl:U.S.MiddleAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469ahl:U.S.MiddleAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469us-gaap:GeographicConcentrationRiskMemberahl:U.S.MiddleAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469ahl:U.S.MountainMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469us-gaap:GeographicConcentrationRiskMemberahl:U.S.MountainMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469ahl:U.S.MountainMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469us-gaap:GeographicConcentrationRiskMemberahl:U.S.MountainMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469ahl:U.S.NewEnglandMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469us-gaap:GeographicConcentrationRiskMemberahl:U.S.NewEnglandMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469ahl:U.S.NewEnglandMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469us-gaap:GeographicConcentrationRiskMemberahl:U.S.NewEnglandMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469ahl:U.S.PacificMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469us-gaap:GeographicConcentrationRiskMemberahl:U.S.PacificMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469ahl:U.S.PacificMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469us-gaap:GeographicConcentrationRiskMemberahl:U.S.PacificMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469ahl:U.S.SouthAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469ahl:U.S.SouthAtlanticMemberus-gaap:GeographicConcentrationRiskMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469ahl:U.S.SouthAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469ahl:U.S.SouthAtlanticMemberus-gaap:GeographicConcentrationRiskMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469ahl:U.S.WestNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469us-gaap:GeographicConcentrationRiskMemberahl:U.S.WestNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469ahl:U.S.WestNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469us-gaap:GeographicConcentrationRiskMemberahl:U.S.WestNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469us-gaap:CommercialRealEstatePortfolioSegmentMemberahl:U.S.WestSouthCentralMember2020-09-300001527469us-gaap:GeographicConcentrationRiskMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:U.S.WestSouthCentralMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469us-gaap:CommercialRealEstatePortfolioSegmentMemberahl:U.S.WestSouthCentralMember2019-12-310001527469us-gaap:GeographicConcentrationRiskMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:U.S.WestSouthCentralMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469us-gaap:CommercialRealEstatePortfolioSegmentMembercountry:US2020-09-300001527469us-gaap:GeographicConcentrationRiskMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMembercountry:US2020-06-302020-06-300001527469us-gaap:CommercialRealEstatePortfolioSegmentMembercountry:US2019-12-310001527469us-gaap:GeographicConcentrationRiskMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMembercountry:US2019-12-312019-12-310001527469us-gaap:NonUsMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469us-gaap:NonUsMemberus-gaap:GeographicConcentrationRiskMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469us-gaap:NonUsMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469us-gaap:NonUsMemberus-gaap:GeographicConcentrationRiskMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469us-gaap:GeographicConcentrationRiskMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469us-gaap:GeographicConcentrationRiskMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469us-gaap:GeographicConcentrationRiskMemberstpr:CAus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469us-gaap:GeographicConcentrationRiskMemberstpr:CAus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469us-gaap:GeographicConcentrationRiskMemberstpr:FLus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469us-gaap:GeographicConcentrationRiskMemberstpr:FLus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469us-gaap:GeographicConcentrationRiskMemberus-gaap:ResidentialMortgageMemberstpr:TXahl:MortgageLoansNetMember2020-06-302020-06-300001527469us-gaap:GeographicConcentrationRiskMemberus-gaap:ResidentialMortgageMemberstpr:TXahl:MortgageLoansNetMember2019-12-312019-12-310001527469us-gaap:GeographicConcentrationRiskMemberstpr:NYus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469us-gaap:GeographicConcentrationRiskMemberstpr:NYus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469ahl:OtherU.S.StatesMemberus-gaap:GeographicConcentrationRiskMemberus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469ahl:OtherU.S.StatesMemberus-gaap:GeographicConcentrationRiskMemberus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469us-gaap:GeographicConcentrationRiskMemberus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMembercountry:US2020-06-302020-06-300001527469us-gaap:GeographicConcentrationRiskMemberus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMembercountry:US2019-12-312019-12-310001527469us-gaap:GeographicConcentrationRiskMembercountry:IEus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469us-gaap:GeographicConcentrationRiskMembercountry:IEus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469us-gaap:GeographicConcentrationRiskMemberahl:InternationalOtherMemberus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469us-gaap:GeographicConcentrationRiskMemberahl:InternationalOtherMemberus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469us-gaap:GeographicConcentrationRiskMemberus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMember2020-06-302020-06-300001527469us-gaap:GeographicConcentrationRiskMemberus-gaap:ResidentialMortgageMemberahl:MortgageLoansNetMember2019-12-312019-12-310001527469us-gaap:CommercialRealEstatePortfolioSegmentMember2020-06-300001527469us-gaap:ResidentialMortgageMember2020-06-300001527469us-gaap:OtherInvestmentsMember2020-06-300001527469us-gaap:OtherInvestmentsMember2019-12-310001527469us-gaap:AccountingStandardsUpdate201613Memberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-07-012020-09-300001527469us-gaap:ResidentialMortgageMemberus-gaap:AccountingStandardsUpdate201613Member2020-07-012020-09-300001527469us-gaap:OtherInvestmentsMemberus-gaap:AccountingStandardsUpdate201613Member2020-07-012020-09-300001527469ahl:InvestmentsincludingrelatedpartyMemberus-gaap:AccountingStandardsUpdate201613Member2020-07-012020-09-300001527469us-gaap:AccountingStandardsUpdate201613Memberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-01-012020-01-010001527469us-gaap:ResidentialMortgageMemberus-gaap:AccountingStandardsUpdate201613Member2020-01-012020-01-010001527469us-gaap:OtherInvestmentsMemberus-gaap:AccountingStandardsUpdate201613Member2020-01-012020-01-010001527469ahl:InvestmentsincludingrelatedpartyMemberus-gaap:AccountingStandardsUpdate201613Member2020-01-012020-01-010001527469us-gaap:CommercialRealEstatePortfolioSegmentMember2020-07-012020-09-300001527469us-gaap:ResidentialMortgageMember2020-07-012020-09-300001527469us-gaap:OtherInvestmentsMember2020-07-012020-09-300001527469us-gaap:CommercialRealEstatePortfolioSegmentMember2020-01-012020-09-300001527469us-gaap:ResidentialMortgageMember2020-01-012020-09-300001527469us-gaap:OtherInvestmentsMember2020-01-012020-09-300001527469us-gaap:OtherInvestmentsMember2020-09-300001527469us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables1To29DaysPastDueMember2020-09-300001527469us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:ResidentialMortgageMember2020-09-300001527469us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2020-09-300001527469us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2020-09-300001527469us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables1To29DaysPastDueMember2020-09-300001527469us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2020-09-300001527469ahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:LTVLessThan50PercentMember2020-09-300001527469ahl:LTV50to60PercentMemberahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469ahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberahl:LTV61to70PercentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469ahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberahl:LTV71to80PercentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469ahl:LTV81to100PercentMemberahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469ahl:LTVGreaterthan100PercentMemberahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469ahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberahl:LTVLessThan50PercentMember2019-12-310001527469ahl:LTV50to60PercentMemberahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469ahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberahl:LTV61to70PercentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469ahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberahl:LTV71to80PercentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469ahl:LTV81to100PercentMemberahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469ahl:DebtServiceCoverageRatioGreaterthan1.20Memberahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469ahl:DebtServiceCoverageRatio1.00to1.20Memberahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469ahl:DebtServiceCoverageRatioLessthan1.00Memberahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2020-09-300001527469ahl:DebtServiceCoverageRatioGreaterthan1.20Memberahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469ahl:DebtServiceCoverageRatio1.00to1.20Memberahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469ahl:DebtServiceCoverageRatioLessthan1.00Memberahl:CommercialMortgageLoansExcludingLoansUnderDevelopmentMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001527469us-gaap:RealEstateFundsMember2020-09-300001527469us-gaap:RealEstateFundsMember2019-12-310001527469ahl:CreditFundsMember2020-09-300001527469ahl:CreditFundsMember2019-12-310001527469us-gaap:PrivateEquityFundsMember2020-09-300001527469us-gaap:PrivateEquityFundsMember2019-12-310001527469ahl:RealAssetsMember2020-09-300001527469ahl:RealAssetsMember2019-12-310001527469us-gaap:CommoditiesInvestmentMember2020-09-300001527469us-gaap:CommoditiesInvestmentMember2019-12-310001527469ahl:MidCapHoldingsMembersrt:AffiliatedEntityMemberahl:CreditFundsMember2020-09-300001527469ahl:MidCapHoldingsMembersrt:AffiliatedEntityMemberahl:CreditFundsMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:PrivateEquityFundsMemberahl:AmeriHomeMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:PrivateEquityFundsMemberahl:AmeriHomeMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:PrivateEquityFundsMemberahl:CatalinaHoldingsBermudaLtdMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:PrivateEquityFundsMemberahl:CatalinaHoldingsBermudaLtdMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:PrivateEquityFundsMemberahl:AthoraHoldingLtd.Member2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:PrivateEquityFundsMemberahl:AthoraHoldingLtd.Member2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:PrivateEquityFundsMemberahl:VenerableHoldingsInc.Member2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:PrivateEquityFundsMemberahl:VenerableHoldingsInc.Member2019-12-310001527469ahl:OtherFundMembersrt:AffiliatedEntityMember2020-09-300001527469ahl:OtherFundMembersrt:AffiliatedEntityMember2019-12-310001527469srt:AffiliatedEntityMemberahl:DifferentiatedInvestmentsMember2020-09-300001527469srt:AffiliatedEntityMemberahl:DifferentiatedInvestmentsMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:RealEstateFundsMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:RealEstateFundsMember2019-12-310001527469srt:AffiliatedEntityMemberahl:CreditFundsMember2020-09-300001527469srt:AffiliatedEntityMemberahl:CreditFundsMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:PrivateEquityFundsMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:PrivateEquityFundsMember2019-12-310001527469srt:AffiliatedEntityMemberahl:RealAssetsMember2020-09-300001527469srt:AffiliatedEntityMemberahl:RealAssetsMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:CommoditiesInvestmentMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:CommoditiesInvestmentMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:EquitySecuritiesMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:EquitySecuritiesMember2019-12-310001527469ahl:OtherFundMembersrt:AffiliatedEntityMemberahl:ApolloandAffiliatesMember2020-09-300001527469ahl:OtherFundMembersrt:AffiliatedEntityMemberahl:ApolloandAffiliatesMember2019-12-310001527469us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOtherMember2020-01-012020-09-300001527469us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOtherMember2019-01-012019-09-300001527469us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberahl:InvestmentFundsMember2020-09-300001527469ahl:InvestmentFundsMember2020-09-300001527469us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberahl:InvestmentFundsMember2019-12-310001527469ahl:InvestmentFundsMember2019-12-310001527469us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMembersrt:AffiliatedEntityMemberahl:InvestmentFundsMember2020-09-300001527469srt:AffiliatedEntityMemberahl:InvestmentFundsMember2020-09-300001527469us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMembersrt:AffiliatedEntityMemberahl:InvestmentFundsMember2019-12-310001527469srt:AffiliatedEntityMemberahl:InvestmentFundsMember2019-12-310001527469us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:DebtSecuritiesMember2020-09-300001527469us-gaap:DebtSecuritiesMember2020-09-300001527469us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:DebtSecuritiesMember2019-12-310001527469us-gaap:DebtSecuritiesMember2019-12-310001527469us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:DebtSecuritiesMembersrt:AffiliatedEntityMember2020-09-300001527469us-gaap:DebtSecuritiesMembersrt:AffiliatedEntityMember2020-09-300001527469us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:DebtSecuritiesMembersrt:AffiliatedEntityMember2019-12-310001527469us-gaap:DebtSecuritiesMembersrt:AffiliatedEntityMember2019-12-310001527469us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMembersrt:AffiliatedEntityMemberus-gaap:EquitySecuritiesMember2020-09-300001527469us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMembersrt:AffiliatedEntityMemberus-gaap:EquitySecuritiesMember2019-12-310001527469us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember2020-09-300001527469us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember2019-12-310001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CurrencySwapMember2020-09-300001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CurrencySwapMember2019-12-310001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:ForeignExchangeForwardMember2020-09-300001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:ForeignExchangeForwardMember2019-12-310001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:ForeignExchangeForwardMemberus-gaap:NetInvestmentHedgingMember2020-09-300001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:ForeignExchangeForwardMemberus-gaap:NetInvestmentHedgingMember2019-12-310001527469us-gaap:DesignatedAsHedgingInstrumentMember2020-09-300001527469us-gaap:DesignatedAsHedgingInstrumentMember2019-12-310001527469us-gaap:NondesignatedMemberus-gaap:StockOptionMember2020-09-300001527469us-gaap:NondesignatedMemberus-gaap:StockOptionMember2019-12-310001527469us-gaap:NondesignatedMemberus-gaap:FutureMember2020-09-300001527469us-gaap:NondesignatedMemberus-gaap:FutureMember2019-12-310001527469us-gaap:NondesignatedMemberus-gaap:TotalReturnSwapMember2020-09-300001527469us-gaap:NondesignatedMemberus-gaap:TotalReturnSwapMember2019-12-310001527469us-gaap:NondesignatedMemberus-gaap:CurrencySwapMember2020-09-300001527469us-gaap:NondesignatedMemberus-gaap:CurrencySwapMember2019-12-310001527469us-gaap:NondesignatedMemberus-gaap:InterestRateSwapMember2020-09-300001527469us-gaap:NondesignatedMemberus-gaap:InterestRateSwapMember2019-12-310001527469us-gaap:NondesignatedMemberus-gaap:CreditDefaultSwapMember2020-09-300001527469us-gaap:NondesignatedMemberus-gaap:CreditDefaultSwapMember2019-12-310001527469us-gaap:NondesignatedMemberus-gaap:ForeignExchangeForwardMember2020-09-300001527469us-gaap:NondesignatedMemberus-gaap:ForeignExchangeForwardMember2019-12-310001527469us-gaap:NondesignatedMemberahl:FundsWithheldatInterestMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2020-09-300001527469us-gaap:NondesignatedMemberahl:FundsWithheldatInterestMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2019-12-310001527469us-gaap:NondesignatedMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberahl:InterestSensitiveContractsMember2020-09-300001527469us-gaap:NondesignatedMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberahl:InterestSensitiveContractsMember2019-12-310001527469us-gaap:NondesignatedMember2020-09-300001527469us-gaap:NondesignatedMember2019-12-310001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMember2020-07-012020-09-300001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMember2019-07-012019-09-300001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMember2020-01-012020-09-300001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CurrencySwapMemberus-gaap:CashFlowHedgingMember2019-01-012019-09-300001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMemberus-gaap:ForeignExchangeForwardMember2020-09-300001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMemberus-gaap:ForeignExchangeForwardMember2019-12-310001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMemberus-gaap:ForeignExchangeForwardMember2020-07-012020-09-300001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMemberus-gaap:ForeignExchangeForwardMember2019-07-012019-09-300001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMemberus-gaap:ForeignExchangeForwardMember2020-01-012020-09-300001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMemberus-gaap:ForeignExchangeForwardMember2019-01-012019-09-300001527469us-gaap:FairValueHedgingMemberus-gaap:ForeignExchangeForwardMember2020-07-012020-09-300001527469us-gaap:FairValueHedgingMemberus-gaap:ForeignExchangeForwardMember2019-07-012019-09-300001527469us-gaap:FairValueHedgingMemberus-gaap:ForeignExchangeForwardMember2020-01-012020-09-300001527469us-gaap:FairValueHedgingMemberus-gaap:ForeignExchangeForwardMember2019-01-012019-09-300001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMemberus-gaap:NetInvestmentHedgingMember2020-07-012020-09-300001527469us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMemberus-gaap:NetInvestmentHedgingMember2020-01-012020-09-300001527469us-gaap:StockOptionMemberus-gaap:GainLossOnInvestmentsMember12020-07-012020-09-300001527469us-gaap:StockOptionMemberus-gaap:GainLossOnInvestmentsMember12019-07-012019-09-300001527469us-gaap:StockOptionMemberus-gaap:GainLossOnInvestmentsMember12020-01-012020-09-300001527469us-gaap:StockOptionMemberus-gaap:GainLossOnInvestmentsMember12019-01-012019-09-300001527469us-gaap:FutureMemberus-gaap:GainLossOnInvestmentsMember12020-07-012020-09-300001527469us-gaap:FutureMemberus-gaap:GainLossOnInvestmentsMember12019-07-012019-09-300001527469us-gaap:FutureMemberus-gaap:GainLossOnInvestmentsMember12020-01-012020-09-300001527469us-gaap:FutureMemberus-gaap:GainLossOnInvestmentsMember12019-01-012019-09-300001527469us-gaap:SwapMemberus-gaap:GainLossOnInvestmentsMember12020-07-012020-09-300001527469us-gaap:SwapMemberus-gaap:GainLossOnInvestmentsMember12019-07-012019-09-300001527469us-gaap:SwapMemberus-gaap:GainLossOnInvestmentsMember12020-01-012020-09-300001527469us-gaap:SwapMemberus-gaap:GainLossOnInvestmentsMember12019-01-012019-09-300001527469us-gaap:ForeignExchangeForwardMemberus-gaap:GainLossOnInvestmentsMember12020-07-012020-09-300001527469us-gaap:ForeignExchangeForwardMemberus-gaap:GainLossOnInvestmentsMember12019-07-012019-09-300001527469us-gaap:ForeignExchangeForwardMemberus-gaap:GainLossOnInvestmentsMember12020-01-012020-09-300001527469us-gaap:ForeignExchangeForwardMemberus-gaap:GainLossOnInvestmentsMember12019-01-012019-09-300001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:GainLossOnInvestmentsMember12020-07-012020-09-300001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:GainLossOnInvestmentsMember12019-07-012019-09-300001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:GainLossOnInvestmentsMember12020-01-012020-09-300001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:GainLossOnInvestmentsMember12019-01-012019-09-300001527469us-gaap:GainLossOnInvestmentsMember12020-07-012020-09-300001527469us-gaap:GainLossOnInvestmentsMember12019-07-012019-09-300001527469us-gaap:GainLossOnInvestmentsMember12020-01-012020-09-300001527469us-gaap:GainLossOnInvestmentsMember12019-01-012019-09-300001527469ahl:InterestSensitiveContractBenefitsMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2020-07-012020-09-300001527469ahl:InterestSensitiveContractBenefitsMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2019-07-012019-09-300001527469ahl:InterestSensitiveContractBenefitsMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2020-01-012020-09-300001527469ahl:InterestSensitiveContractBenefitsMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2019-01-012019-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:FairValueInputsLevel2Memberus-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:FairValueInputsLevel3Memberus-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-09-300001527469us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-09-300001527469us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-09-300001527469us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2020-09-300001527469us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2020-09-300001527469us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2020-09-300001527469us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2020-09-300001527469us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2020-09-300001527469us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2020-09-300001527469us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2020-09-300001527469us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2020-09-300001527469us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2020-09-300001527469us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-09-300001527469us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-09-300001527469us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-09-300001527469us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-09-300001527469us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:FairValueInputsLevel2Memberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:FairValueInputsLevel3Memberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2020-09-300001527469us-gaap:FairValueInputsLevel2Membersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2020-09-300001527469us-gaap:FairValueInputsLevel2Membersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2020-09-300001527469us-gaap:FairValueInputsLevel2Membersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:FairValueInputsLevel2Membersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:FairValueInputsLevel2Membersrt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:UniversalLifeMember2020-09-300001527469us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:UniversalLifeMember2020-09-300001527469us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:UniversalLifeMember2020-09-300001527469us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:UniversalLifeMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberahl:AmerUsClosedBlockMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469ahl:AmerUsClosedBlockMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:FairValueInputsLevel2Memberahl:AmerUsClosedBlockMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469ahl:AmerUsClosedBlockMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberahl:IndianapolisLifeInsuranceCompanyClosedBlockMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:FairValueInputsLevel1Memberahl:IndianapolisLifeInsuranceCompanyClosedBlockMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:FairValueInputsLevel2Memberahl:IndianapolisLifeInsuranceCompanyClosedBlockMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:FairValueInputsLevel3Memberahl:IndianapolisLifeInsuranceCompanyClosedBlockMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:FairValueInputsLevel2Memberus-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:FairValueInputsLevel3Memberus-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2019-12-310001527469us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2019-12-310001527469us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2019-12-310001527469us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2019-12-310001527469us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2019-12-310001527469us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2019-12-310001527469us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2019-12-310001527469us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2019-12-310001527469us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2019-12-310001527469us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2019-12-310001527469us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2019-12-310001527469us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2019-12-310001527469us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2019-12-310001527469us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:FairValueInputsLevel2Memberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:FairValueInputsLevel3Memberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2019-12-310001527469us-gaap:FairValueInputsLevel2Membersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2019-12-310001527469us-gaap:FairValueInputsLevel2Membersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469us-gaap:FairValueInputsLevel2Membersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:FairValueInputsLevel2Membersrt:AffiliatedEntityMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:FairValueInputsLevel2Membersrt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:UniversalLifeMember2019-12-310001527469us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:UniversalLifeMember2019-12-310001527469us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:UniversalLifeMember2019-12-310001527469us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:UniversalLifeMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberahl:AmerUsClosedBlockMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469ahl:AmerUsClosedBlockMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:FairValueInputsLevel2Memberahl:AmerUsClosedBlockMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469ahl:AmerUsClosedBlockMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberahl:IndianapolisLifeInsuranceCompanyClosedBlockMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:FairValueInputsLevel1Memberahl:IndianapolisLifeInsuranceCompanyClosedBlockMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:FairValueInputsLevel2Memberahl:IndianapolisLifeInsuranceCompanyClosedBlockMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469us-gaap:FairValueInputsLevel3Memberahl:IndianapolisLifeInsuranceCompanyClosedBlockMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001527469ahl:DebtSecuritiesTradingMemberus-gaap:GainLossOnInvestmentsMember12020-07-012020-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:GainLossOnInvestmentsMember12019-07-012019-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:GainLossOnInvestmentsMember12020-01-012020-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:GainLossOnInvestmentsMember12019-01-012019-09-300001527469us-gaap:LoansReceivableMember2020-07-012020-09-300001527469us-gaap:LoansReceivableMember2019-07-012019-09-300001527469us-gaap:LoansReceivableMember2020-01-012020-09-300001527469us-gaap:LoansReceivableMember2019-01-012019-09-300001527469us-gaap:InvestmentIncomeMemberahl:InvestmentFundsMember2020-07-012020-09-300001527469us-gaap:InvestmentIncomeMemberahl:InvestmentFundsMember2019-07-012019-09-300001527469us-gaap:InvestmentIncomeMemberahl:InvestmentFundsMember2020-01-012020-09-300001527469us-gaap:InvestmentIncomeMemberahl:InvestmentFundsMember2019-01-012019-09-300001527469ahl:FuturePolicyBenefitsMemberus-gaap:InsuranceContractRightsAndObligationsFairValueOptionMember2020-07-012020-09-300001527469ahl:FuturePolicyBenefitsMemberus-gaap:InsuranceContractRightsAndObligationsFairValueOptionMember2019-07-012019-09-300001527469ahl:FuturePolicyBenefitsMemberus-gaap:InsuranceContractRightsAndObligationsFairValueOptionMember2020-01-012020-09-300001527469ahl:FuturePolicyBenefitsMemberus-gaap:InsuranceContractRightsAndObligationsFairValueOptionMember2019-01-012019-09-300001527469us-gaap:LoansReceivableMember2020-09-300001527469us-gaap:LoansReceivableMember2019-12-310001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-06-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-07-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-06-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-07-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CorporateDebtSecuritiesMember2020-06-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CorporateDebtSecuritiesMember2020-07-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CollateralizedDebtObligationsMember2020-06-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CollateralizedDebtObligationsMember2020-07-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CollateralizedDebtObligationsMember2020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:AssetBackedSecuritiesMember2020-06-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:AssetBackedSecuritiesMember2020-07-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:AssetBackedSecuritiesMember2020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CommercialMortgageBackedSecuritiesMember2020-06-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CommercialMortgageBackedSecuritiesMember2020-07-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CommercialMortgageBackedSecuritiesMember2020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-06-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-07-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:CorporateDebtSecuritiesMember2020-06-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:CorporateDebtSecuritiesMember2020-07-012020-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:CorporateDebtSecuritiesMember2020-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2020-06-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2020-07-012020-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2020-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2020-06-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2020-07-012020-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2020-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-06-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-07-012020-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-09-300001527469us-gaap:EquitySecuritiesMember2020-06-300001527469us-gaap:EquitySecuritiesMember2020-07-012020-09-300001527469us-gaap:EquitySecuritiesMember2020-09-300001527469us-gaap:LoansReceivableMember2020-06-300001527469us-gaap:LoansReceivableMember2020-07-012020-09-300001527469us-gaap:LoansReceivableMember2020-09-300001527469ahl:InvestmentFundsMember2020-06-300001527469ahl:InvestmentFundsMember2020-07-012020-09-300001527469ahl:FundsWithheldatInterestMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2020-06-300001527469ahl:FundsWithheldatInterestMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2020-07-012020-09-300001527469ahl:FundsWithheldatInterestMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2020-09-300001527469us-gaap:ShortTermInvestmentsMember2020-06-300001527469us-gaap:ShortTermInvestmentsMember2020-07-012020-09-300001527469us-gaap:ShortTermInvestmentsMember2020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:CorporateDebtSecuritiesMember2020-06-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:CorporateDebtSecuritiesMember2020-07-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:CorporateDebtSecuritiesMember2020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:CollateralizedDebtObligationsMember2020-06-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:CollateralizedDebtObligationsMember2020-07-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:CollateralizedDebtObligationsMember2020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2020-06-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2020-07-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2020-09-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2020-06-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2020-07-012020-09-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2020-09-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2020-06-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2020-07-012020-09-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2020-09-300001527469srt:AffiliatedEntityMemberus-gaap:EquitySecuritiesMember2020-06-300001527469srt:AffiliatedEntityMemberus-gaap:EquitySecuritiesMember2020-07-012020-09-300001527469srt:AffiliatedEntityMemberahl:InvestmentFundsMember2020-06-300001527469srt:AffiliatedEntityMemberahl:InvestmentFundsMember2020-07-012020-09-300001527469ahl:FundsWithheldatInterestMembersrt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2020-06-300001527469ahl:FundsWithheldatInterestMembersrt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2020-07-012020-09-300001527469ahl:FundsWithheldatInterestMembersrt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2020-09-300001527469us-gaap:ReinsuranceRecoverableMember2020-06-300001527469us-gaap:ReinsuranceRecoverableMember2020-07-012020-09-300001527469us-gaap:ReinsuranceRecoverableMember2020-09-300001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberahl:InterestSensitiveContractsMember2020-06-300001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberahl:InterestSensitiveContractsMember2020-07-012020-09-300001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberahl:InterestSensitiveContractsMember2020-09-300001527469ahl:InterestSensitiveContractsMemberus-gaap:UniversalLifeMember2020-06-300001527469ahl:InterestSensitiveContractsMemberus-gaap:UniversalLifeMember2020-07-012020-09-300001527469ahl:InterestSensitiveContractsMemberus-gaap:UniversalLifeMember2020-09-300001527469ahl:FuturePolicyBenefitsMemberahl:AmerUsClosedBlockMember2020-06-300001527469ahl:FuturePolicyBenefitsMemberahl:AmerUsClosedBlockMember2020-07-012020-09-300001527469ahl:FuturePolicyBenefitsMemberahl:AmerUsClosedBlockMember2020-09-300001527469ahl:FuturePolicyBenefitsMemberahl:IndianapolisLifeInsuranceCompanyClosedBlockMember2020-06-300001527469ahl:FuturePolicyBenefitsMemberahl:IndianapolisLifeInsuranceCompanyClosedBlockMember2020-07-012020-09-300001527469ahl:FuturePolicyBenefitsMemberahl:IndianapolisLifeInsuranceCompanyClosedBlockMember2020-09-300001527469us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2020-06-300001527469us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2020-07-012020-09-300001527469us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2019-06-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2019-07-012019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CorporateDebtSecuritiesMember2019-06-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CorporateDebtSecuritiesMember2019-07-012019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CorporateDebtSecuritiesMember2019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CollateralizedDebtObligationsMember2019-06-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CollateralizedDebtObligationsMember2019-07-012019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CollateralizedDebtObligationsMember2019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:AssetBackedSecuritiesMember2019-06-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:AssetBackedSecuritiesMember2019-07-012019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:AssetBackedSecuritiesMember2019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CommercialMortgageBackedSecuritiesMember2019-06-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CommercialMortgageBackedSecuritiesMember2019-07-012019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CommercialMortgageBackedSecuritiesMember2019-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:CorporateDebtSecuritiesMember2019-06-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:CorporateDebtSecuritiesMember2019-07-012019-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:CorporateDebtSecuritiesMember2019-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2019-06-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2019-07-012019-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2019-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2019-06-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2019-07-012019-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2019-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2019-06-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2019-07-012019-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2019-09-300001527469us-gaap:EquitySecuritiesMember2019-06-300001527469us-gaap:EquitySecuritiesMember2019-07-012019-09-300001527469us-gaap:EquitySecuritiesMember2019-09-300001527469us-gaap:LoansReceivableMember2019-06-300001527469us-gaap:LoansReceivableMember2019-07-012019-09-300001527469us-gaap:LoansReceivableMember2019-09-300001527469ahl:InvestmentFundsMember2019-06-300001527469ahl:InvestmentFundsMember2019-07-012019-09-300001527469ahl:InvestmentFundsMember2019-09-300001527469ahl:FundsWithheldatInterestMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2019-06-300001527469ahl:FundsWithheldatInterestMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2019-07-012019-09-300001527469ahl:FundsWithheldatInterestMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2019-09-300001527469us-gaap:ShortTermInvestmentsMember2019-06-300001527469us-gaap:ShortTermInvestmentsMember2019-07-012019-09-300001527469us-gaap:ShortTermInvestmentsMember2019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:CollateralizedDebtObligationsMember2019-06-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:CollateralizedDebtObligationsMember2019-07-012019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:CollateralizedDebtObligationsMember2019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2019-06-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2019-07-012019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2019-09-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2019-06-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2019-07-012019-09-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2019-09-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2019-06-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2019-07-012019-09-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2019-09-300001527469srt:AffiliatedEntityMemberus-gaap:EquitySecuritiesMember2019-06-300001527469srt:AffiliatedEntityMemberus-gaap:EquitySecuritiesMember2019-07-012019-09-300001527469srt:AffiliatedEntityMemberus-gaap:EquitySecuritiesMember2019-09-300001527469srt:AffiliatedEntityMemberahl:InvestmentFundsMember2019-06-300001527469srt:AffiliatedEntityMemberahl:InvestmentFundsMember2019-07-012019-09-300001527469srt:AffiliatedEntityMemberahl:InvestmentFundsMember2019-09-300001527469ahl:FundsWithheldatInterestMembersrt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2019-06-300001527469ahl:FundsWithheldatInterestMembersrt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2019-07-012019-09-300001527469ahl:FundsWithheldatInterestMembersrt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2019-09-300001527469us-gaap:ReinsuranceRecoverableMember2019-06-300001527469us-gaap:ReinsuranceRecoverableMember2019-07-012019-09-300001527469us-gaap:ReinsuranceRecoverableMember2019-09-300001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberahl:InterestSensitiveContractsMember2019-06-300001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberahl:InterestSensitiveContractsMember2019-07-012019-09-300001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberahl:InterestSensitiveContractsMember2019-09-300001527469ahl:InterestSensitiveContractsMemberus-gaap:UniversalLifeMember2019-06-300001527469ahl:InterestSensitiveContractsMemberus-gaap:UniversalLifeMember2019-07-012019-09-300001527469ahl:InterestSensitiveContractsMemberus-gaap:UniversalLifeMember2019-09-300001527469ahl:FuturePolicyBenefitsMemberahl:AmerUsClosedBlockMember2019-06-300001527469ahl:FuturePolicyBenefitsMemberahl:AmerUsClosedBlockMember2019-07-012019-09-300001527469ahl:FuturePolicyBenefitsMemberahl:AmerUsClosedBlockMember2019-09-300001527469ahl:FuturePolicyBenefitsMemberahl:IndianapolisLifeInsuranceCompanyClosedBlockMember2019-06-300001527469ahl:FuturePolicyBenefitsMemberahl:IndianapolisLifeInsuranceCompanyClosedBlockMember2019-07-012019-09-300001527469ahl:FuturePolicyBenefitsMemberahl:IndianapolisLifeInsuranceCompanyClosedBlockMember2019-09-300001527469us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2019-06-300001527469us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2019-07-012019-09-300001527469us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2019-12-310001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-01-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2019-12-310001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-01-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CorporateDebtSecuritiesMember2020-01-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CollateralizedDebtObligationsMember2019-12-310001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CollateralizedDebtObligationsMember2020-01-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:AssetBackedSecuritiesMember2020-01-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CommercialMortgageBackedSecuritiesMember2019-12-310001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CommercialMortgageBackedSecuritiesMember2020-01-012020-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:CorporateDebtSecuritiesMember2019-12-310001527469ahl:DebtSecuritiesTradingMemberus-gaap:CorporateDebtSecuritiesMember2020-01-012020-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2019-12-310001527469ahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2020-01-012020-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469ahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2020-01-012020-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2019-12-310001527469ahl:DebtSecuritiesTradingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-01-012020-09-300001527469us-gaap:EquitySecuritiesMember2019-12-310001527469us-gaap:LoansReceivableMember2019-12-310001527469us-gaap:LoansReceivableMember2020-01-012020-09-300001527469ahl:InvestmentFundsMember2020-01-012020-09-300001527469ahl:FundsWithheldatInterestMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2019-12-310001527469ahl:FundsWithheldatInterestMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2020-01-012020-09-300001527469us-gaap:ShortTermInvestmentsMember2019-12-310001527469us-gaap:ShortTermInvestmentsMember2020-01-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:CorporateDebtSecuritiesMember2019-12-310001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:CorporateDebtSecuritiesMember2020-01-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:CollateralizedDebtObligationsMember2019-12-310001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:CollateralizedDebtObligationsMember2020-01-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2020-01-012020-09-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2019-12-310001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2020-01-012020-09-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2020-01-012020-09-300001527469srt:AffiliatedEntityMemberus-gaap:EquitySecuritiesMember2020-01-012020-09-300001527469srt:AffiliatedEntityMemberahl:InvestmentFundsMember2020-01-012020-09-300001527469ahl:FundsWithheldatInterestMembersrt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2019-12-310001527469ahl:FundsWithheldatInterestMembersrt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2020-01-012020-09-300001527469us-gaap:ReinsuranceRecoverableMember2019-12-310001527469us-gaap:ReinsuranceRecoverableMember2020-01-012020-09-300001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberahl:InterestSensitiveContractsMember2019-12-310001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberahl:InterestSensitiveContractsMember2020-01-012020-09-300001527469ahl:InterestSensitiveContractsMemberus-gaap:UniversalLifeMember2019-12-310001527469ahl:InterestSensitiveContractsMemberus-gaap:UniversalLifeMember2020-01-012020-09-300001527469ahl:FuturePolicyBenefitsMemberahl:AmerUsClosedBlockMember2019-12-310001527469ahl:FuturePolicyBenefitsMemberahl:AmerUsClosedBlockMember2020-01-012020-09-300001527469ahl:FuturePolicyBenefitsMemberahl:IndianapolisLifeInsuranceCompanyClosedBlockMember2019-12-310001527469ahl:FuturePolicyBenefitsMemberahl:IndianapolisLifeInsuranceCompanyClosedBlockMember2020-01-012020-09-300001527469us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2019-12-310001527469us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2020-01-012020-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2018-12-310001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2019-01-012019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CorporateDebtSecuritiesMember2018-12-310001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CorporateDebtSecuritiesMember2019-01-012019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CollateralizedDebtObligationsMember2018-12-310001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CollateralizedDebtObligationsMember2019-01-012019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:AssetBackedSecuritiesMember2018-12-310001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:AssetBackedSecuritiesMember2019-01-012019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CommercialMortgageBackedSecuritiesMember2018-12-310001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:CommercialMortgageBackedSecuritiesMember2019-01-012019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2018-12-310001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2019-01-012019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2019-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2018-12-310001527469ahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2019-01-012019-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2018-12-310001527469ahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2019-01-012019-09-300001527469ahl:DebtSecuritiesTradingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2018-12-310001527469ahl:DebtSecuritiesTradingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2019-01-012019-09-300001527469us-gaap:EquitySecuritiesMember2018-12-310001527469us-gaap:LoansReceivableMember2018-12-310001527469us-gaap:LoansReceivableMember2019-01-012019-09-300001527469ahl:InvestmentFundsMember2018-12-310001527469ahl:InvestmentFundsMember2019-01-012019-09-300001527469ahl:FundsWithheldatInterestMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2018-12-310001527469ahl:FundsWithheldatInterestMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2019-01-012019-09-300001527469us-gaap:ShortTermInvestmentsMember2018-12-310001527469us-gaap:ShortTermInvestmentsMember2019-01-012019-09-300001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2018-12-310001527469ahl:DebtSecuritiesAvailableforsaleMembersrt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2019-01-012019-09-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2018-12-310001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:CollateralizedDebtObligationsMember2019-01-012019-09-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2018-12-310001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMemberus-gaap:AssetBackedSecuritiesMember2019-01-012019-09-300001527469srt:AffiliatedEntityMemberus-gaap:EquitySecuritiesMember2018-12-310001527469srt:AffiliatedEntityMemberus-gaap:EquitySecuritiesMember2019-01-012019-09-300001527469srt:AffiliatedEntityMemberahl:InvestmentFundsMember2018-12-310001527469srt:AffiliatedEntityMemberahl:InvestmentFundsMember2019-01-012019-09-300001527469ahl:FundsWithheldatInterestMembersrt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2018-12-310001527469ahl:FundsWithheldatInterestMembersrt:AffiliatedEntityMemberus-gaap:EmbeddedDerivativeFinancialInstrumentsMember2019-01-012019-09-300001527469us-gaap:ReinsuranceRecoverableMember2018-12-310001527469us-gaap:ReinsuranceRecoverableMember2019-01-012019-09-300001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberahl:InterestSensitiveContractsMember2018-12-310001527469us-gaap:EmbeddedDerivativeFinancialInstrumentsMemberahl:InterestSensitiveContractsMember2019-01-012019-09-300001527469ahl:InterestSensitiveContractsMemberus-gaap:UniversalLifeMember2018-12-310001527469ahl:InterestSensitiveContractsMemberus-gaap:UniversalLifeMember2019-01-012019-09-300001527469ahl:FuturePolicyBenefitsMemberahl:AmerUsClosedBlockMember2018-12-310001527469ahl:FuturePolicyBenefitsMemberahl:AmerUsClosedBlockMember2019-01-012019-09-300001527469ahl:FuturePolicyBenefitsMemberahl:IndianapolisLifeInsuranceCompanyClosedBlockMember2018-12-310001527469ahl:FuturePolicyBenefitsMemberahl:IndianapolisLifeInsuranceCompanyClosedBlockMember2019-01-012019-09-300001527469us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2018-12-310001527469us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2019-01-012019-09-300001527469us-gaap:ShortTermInvestmentsMember2020-07-012020-09-300001527469srt:AffiliatedEntityMemberahl:InvestmentFundsMember2020-07-012020-09-300001527469ahl:InvestmentFundsMember2019-07-012019-09-300001527469us-gaap:ShortTermInvestmentsMember2019-07-012019-09-300001527469us-gaap:ShortTermInvestmentsMember2020-01-012020-09-300001527469srt:AffiliatedEntityMemberahl:InvestmentFundsMember2020-01-012020-09-300001527469us-gaap:ShortTermInvestmentsMember2019-01-012019-09-300001527469srt:AffiliatedEntityMemberahl:DebtSecuritiesTradingMembersrt:ConsolidatedEntityExcludingVariableInterestEntitiesVIEMemberus-gaap:AssetBackedSecuritiesMember2019-01-012019-09-300001527469srt:AffiliatedEntityMemberahl:InvestmentFundsMember2019-01-012019-09-300001527469us-gaap:FairValueInputsLevel3Member2020-09-300001527469us-gaap:MeasurementInputDiscountRateMembersrt:MinimumMember2020-09-300001527469us-gaap:MeasurementInputDiscountRateMembersrt:MaximumMember2020-09-300001527469us-gaap:MeasurementInputDiscountRateMembersrt:WeightedAverageMember2020-09-300001527469us-gaap:FairValueInputsLevel3Memberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberahl:InterestSensitiveContractsMember2020-09-300001527469us-gaap:MeasurementInputEntityCreditRiskMembersrt:MinimumMember2020-09-300001527469srt:MaximumMemberus-gaap:MeasurementInputEntityCreditRiskMember2020-09-300001527469srt:WeightedAverageMemberus-gaap:MeasurementInputEntityCreditRiskMember2020-09-300001527469us-gaap:MeasurementInputOptionVolatilityMembersrt:MinimumMember2020-09-300001527469srt:MaximumMemberus-gaap:MeasurementInputOptionVolatilityMember2020-09-300001527469srt:WeightedAverageMemberus-gaap:MeasurementInputOptionVolatilityMember2020-09-300001527469us-gaap:MeasurementInputWithdrawalRateMembersrt:MinimumMember2020-09-300001527469srt:MaximumMemberus-gaap:MeasurementInputWithdrawalRateMember2020-09-300001527469srt:WeightedAverageMemberus-gaap:MeasurementInputWithdrawalRateMember2020-09-300001527469us-gaap:FairValueInputsLevel3Member2019-12-310001527469us-gaap:MeasurementInputDiscountRateMembersrt:MinimumMember2019-12-310001527469us-gaap:MeasurementInputDiscountRateMembersrt:MaximumMember2019-12-310001527469us-gaap:MeasurementInputDiscountRateMembersrt:WeightedAverageMember2019-12-310001527469us-gaap:FairValueInputsLevel3Memberus-gaap:EmbeddedDerivativeFinancialInstrumentsMemberahl:InterestSensitiveContractsMember2019-12-310001527469us-gaap:MeasurementInputEntityCreditRiskMembersrt:MinimumMember2019-12-310001527469srt:MaximumMemberus-gaap:MeasurementInputEntityCreditRiskMember2019-12-310001527469srt:WeightedAverageMemberus-gaap:MeasurementInputEntityCreditRiskMember2019-12-310001527469us-gaap:MeasurementInputOptionVolatilityMembersrt:MinimumMember2019-12-310001527469srt:MaximumMemberus-gaap:MeasurementInputOptionVolatilityMember2019-12-310001527469srt:WeightedAverageMemberus-gaap:MeasurementInputOptionVolatilityMember2019-12-310001527469us-gaap:MeasurementInputWithdrawalRateMembersrt:MinimumMember2019-12-310001527469srt:MaximumMemberus-gaap:MeasurementInputWithdrawalRateMember2019-12-310001527469srt:WeightedAverageMemberus-gaap:MeasurementInputWithdrawalRateMember2019-12-310001527469us-gaap:CarryingReportedAmountFairValueDisclosureMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel1Member2020-09-300001527469us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-09-300001527469us-gaap:CarryingReportedAmountFairValueDisclosureMembersrt:AffiliatedEntityMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel1Member2020-09-300001527469us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMember2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel3Member2020-09-300001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-09-300001527469us-gaap:CarryingReportedAmountFairValueDisclosureMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel1Member2019-12-310001527469us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2019-12-310001527469us-gaap:CarryingReportedAmountFairValueDisclosureMembersrt:AffiliatedEntityMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel1Member2019-12-310001527469us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMember2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:FairValueInputsLevel3Member2019-12-310001527469us-gaap:EstimateOfFairValueFairValueDisclosureMembersrt:AffiliatedEntityMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2019-12-310001527469ahl:ReinsuranceAgreementMember2020-07-170001527469ahl:ReinsuranceAgreementMember2020-06-010001527469ahl:MassMutualMember2020-07-010001527469us-gaap:AccountingStandardsUpdate201613Member2020-01-012020-09-300001527469srt:FederalHomeLoanBankOfDesMoinesMemberus-gaap:FederalHomeLoanBankAdvancesConvertibleOptionMember2020-09-300001527469ahl:SeniorNotesdue2030Member2020-09-300001527469ahl:SeniorNotesDue2031Memberus-gaap:SubsequentEventMember2020-10-080001527469us-gaap:SeriesAPreferredStockMember2020-06-302020-06-300001527469us-gaap:SeriesBPreferredStockMember2020-06-302020-06-300001527469us-gaap:SeriesCPreferredStockMember2020-06-302020-06-300001527469us-gaap:SeriesAPreferredStockMember2020-07-012020-09-300001527469us-gaap:SeriesAPreferredStockMember2019-07-012019-09-300001527469us-gaap:SeriesAPreferredStockMember2019-01-012019-09-300001527469us-gaap:SeriesBPreferredStockMember2020-07-012020-09-300001527469us-gaap:SeriesBPreferredStockMember2019-07-012019-09-300001527469us-gaap:SeriesBPreferredStockMember2019-01-012019-09-300001527469us-gaap:SeriesCPreferredStockMember2020-07-012020-09-300001527469us-gaap:SeriesCPreferredStockMember2019-07-012019-09-300001527469us-gaap:SeriesCPreferredStockMember2019-01-012019-09-300001527469us-gaap:CommonStockMemberahl:CommonClassMMember2020-02-282020-02-280001527469us-gaap:WarrantMemberahl:CommonClassMMember2020-02-282020-02-280001527469us-gaap:CommonClassAMemberahl:RepurchaseAuthorization2018Member2019-12-310001527469us-gaap:CommonClassAMemberahl:RepurchaseAuthorization2018Member2018-12-310001527469us-gaap:CommonClassAMemberahl:RepurchaseAuthorization2018Member2020-01-012020-09-300001527469us-gaap:CommonClassAMemberahl:RepurchaseAuthorization2018Member2019-01-012019-09-300001527469us-gaap:CommonClassAMemberahl:RepurchaseAuthorization2018Member2020-09-300001527469us-gaap:CommonClassAMemberahl:RepurchaseAuthorization2018Member2019-09-300001527469ahl:CommonClassM1Memberus-gaap:WarrantMember2020-01-012020-09-300001527469us-gaap:WarrantMemberahl:CommonClassM2Member2020-01-012020-09-300001527469ahl:CommonClassM3Memberus-gaap:WarrantMember2020-01-012020-09-300001527469ahl:CommonClassM4Memberus-gaap:WarrantMember2020-01-012020-09-300001527469us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossNoncontrollingInterestMember2020-06-300001527469us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossParentMember2020-06-300001527469ahl:DeferredAcquisitionCostsDeferredSalesInducementsDeferredValueofBusinessAcquiredandFuturePolicyBenefitAdjustmentonAvailableforsaleSecuritiesAttributabletoParentMember2020-06-300001527469us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2020-06-300001527469ahl:AccumulatedForeignCurrencyAdjustmentandOtherAttributabletoParentMember2020-06-300001527469us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossIncludingNoncontrollingInterestMember2020-07-012020-09-300001527469us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossIncludingNoncontrollingInterestMember2020-07-012020-09-300001527469ahl:AccumulatedNetInvestmentGainLossIncludingDeferredAcquisitionCostsDeferredSalesInducementsValueofBusinessAcquiredFuturePolicyBenefitsIncludingNoncontrollingInterestMember2020-07-012020-09-300001527469us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterestMember2020-07-012020-09-300001527469ahl:AccumulatedForeignCurrencyAdjustmentandOtherIncludingPortionAttributabletoNoncontrollingInterestMember2020-07-012020-09-300001527469us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossNoncontrollingInterestMember2020-07-012020-09-300001527469us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossNoncontrollingInterestMember2020-07-012020-09-300001527469ahl:DeferredAcquisitionCostsDeferredValueofBusinessAcquiredandFuturePolicyBenefitAdjustmentonAvailableforsaleSecuritiesAttributabletoNoncontrollingInterestMember2020-07-012020-09-300001527469us-gaap:AccumulatedNetGainLossFromCashFlowHedgesAttributableToNoncontrollingInterestMember2020-07-012020-09-300001527469ahl:AccumulatedForeignCurrencyAdjustmentandOtherAttributabletoNoncontrollingInterestMember2020-07-012020-09-300001527469us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossNoncontrollingInterestMember2020-09-300001527469us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossParentMember2020-09-300001527469ahl:DeferredAcquisitionCostsDeferredSalesInducementsDeferredValueofBusinessAcquiredandFuturePolicyBenefitAdjustmentonAvailableforsaleSecuritiesAttributabletoParentMember2020-09-300001527469us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2020-09-300001527469ahl:AccumulatedForeignCurrencyAdjustmentandOtherAttributabletoParentMember2020-09-300001527469us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2019-06-300001527469ahl:DeferredAcquisitionCostsDeferredSalesInducementsDeferredValueofBusinessAcquiredandFuturePolicyBenefitAdjustmentonAvailableforsaleSecuritiesAttributabletoParentMember2019-06-300001527469us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2019-06-300001527469ahl:AccumulatedForeignCurrencyAdjustmentandOtherAttributabletoParentMember2019-06-300001527469us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2019-07-012019-09-300001527469ahl:AccumulatedNetInvestmentGainLossIncludingDeferredAcquisitionCostsDeferredSalesInducementsValueofBusinessAcquiredFuturePolicyBenefitsIncludingNoncontrollingInterestMember2019-07-012019-09-300001527469us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterestMember2019-07-012019-09-300001527469ahl:AccumulatedForeignCurrencyAdjustmentandOtherIncludingPortionAttributabletoNoncontrollingInterestMember2019-07-012019-09-300001527469us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2019-09-300001527469ahl:DeferredAcquisitionCostsDeferredSalesInducementsDeferredValueofBusinessAcquiredandFuturePolicyBenefitAdjustmentonAvailableforsaleSecuritiesAttributabletoParentMember2019-09-300001527469us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2019-09-300001527469ahl:AccumulatedForeignCurrencyAdjustmentandOtherAttributabletoParentMember2019-09-300001527469us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossNoncontrollingInterestMember2019-12-310001527469us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossParentMember2019-12-310001527469ahl:DeferredAcquisitionCostsDeferredSalesInducementsDeferredValueofBusinessAcquiredandFuturePolicyBenefitAdjustmentonAvailableforsaleSecuritiesAttributabletoParentMember2019-12-310001527469us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2019-12-310001527469ahl:AccumulatedForeignCurrencyAdjustmentandOtherAttributabletoParentMember2019-12-310001527469us-gaap:AccountingStandardsUpdate201613Membersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossIncludingNoncontrollingInterestMember2020-01-010001527469us-gaap:AccountingStandardsUpdate201613Membersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossIncludingNoncontrollingInterestMember2020-01-010001527469us-gaap:AccountingStandardsUpdate201613Memberahl:DeferredAcquisitionCostsDeferredSalesInducementsDeferredValueofBusinessAcquiredandFuturePolicyBenefitAdjustmentonAvailableforsaleSecuritiesAttributabletoParentMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-01-010001527469us-gaap:AccountingStandardsUpdate201613Membersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2020-01-010001527469us-gaap:AccountingStandardsUpdate201613Membersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberahl:AccumulatedForeignCurrencyAdjustmentandOtherAttributabletoParentMember2020-01-010001527469us-gaap:AccountingStandardsUpdate201613Memberus-gaap:AccumulatedOtherComprehensiveIncomeMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-01-010001527469us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossIncludingNoncontrollingInterestMember2020-01-012020-09-300001527469us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossIncludingNoncontrollingInterestMember2020-01-012020-09-300001527469ahl:AccumulatedNetInvestmentGainLossIncludingDeferredAcquisitionCostsDeferredSalesInducementsValueofBusinessAcquiredFuturePolicyBenefitsIncludingNoncontrollingInterestMember2020-01-012020-09-300001527469us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterestMember2020-01-012020-09-300001527469ahl:AccumulatedForeignCurrencyAdjustmentandOtherIncludingPortionAttributabletoNoncontrollingInterestMember2020-01-012020-09-300001527469us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossNoncontrollingInterestMember2020-01-012020-09-300001527469us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossNoncontrollingInterestMember2020-01-012020-09-300001527469ahl:DeferredAcquisitionCostsDeferredValueofBusinessAcquiredandFuturePolicyBenefitAdjustmentonAvailableforsaleSecuritiesAttributabletoNoncontrollingInterestMember2020-01-012020-09-300001527469us-gaap:AccumulatedNetGainLossFromCashFlowHedgesAttributableToNoncontrollingInterestMember2020-01-012020-09-300001527469ahl:AccumulatedForeignCurrencyAdjustmentandOtherAttributabletoNoncontrollingInterestMember2020-01-012020-09-300001527469us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2018-12-310001527469ahl:DeferredAcquisitionCostsDeferredSalesInducementsDeferredValueofBusinessAcquiredandFuturePolicyBenefitAdjustmentonAvailableforsaleSecuritiesAttributabletoParentMember2018-12-310001527469us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2018-12-310001527469ahl:AccumulatedForeignCurrencyAdjustmentandOtherAttributabletoParentMember2018-12-310001527469us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2019-01-012019-09-300001527469ahl:AccumulatedNetInvestmentGainLossIncludingDeferredAcquisitionCostsDeferredSalesInducementsValueofBusinessAcquiredFuturePolicyBenefitsIncludingNoncontrollingInterestMember2019-01-012019-09-300001527469us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterestMember2019-01-012019-09-300001527469ahl:AccumulatedForeignCurrencyAdjustmentandOtherIncludingPortionAttributabletoNoncontrollingInterestMember2019-01-012019-09-300001527469srt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2020-01-012020-09-300001527469srt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2018-12-310001527469ahl:CoreSuballocationAssetsMembersrt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2020-01-012020-09-300001527469ahl:CorePlusMembersrt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2020-01-012020-09-300001527469ahl:YieldMembersrt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2020-01-012020-09-300001527469srt:AffiliatedEntityMemberahl:HighAlphaMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2020-01-012020-09-300001527469srt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:OtherSuballocationAssetsMemberahl:SuballocatedassetsMember2020-01-012020-09-300001527469ahl:CoreSuballocationAssetsMembersrt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2020-09-300001527469ahl:CoreSuballocationAssetsMembersrt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2019-12-310001527469ahl:CorePlusMembersrt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2020-09-300001527469ahl:CorePlusMembersrt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2019-12-310001527469ahl:YieldMembersrt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2020-09-300001527469ahl:YieldMembersrt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2019-12-310001527469srt:AffiliatedEntityMemberahl:HighAlphaMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2020-09-300001527469srt:AffiliatedEntityMemberahl:HighAlphaMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2019-12-310001527469srt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:OtherSuballocationAssetsMemberahl:SuballocatedassetsMember2020-09-300001527469srt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:OtherSuballocationAssetsMemberahl:SuballocatedassetsMember2019-12-310001527469srt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2020-09-300001527469srt:AffiliatedEntityMemberahl:ApolloandAffiliatesMemberahl:SuballocatedassetsMember2019-12-310001527469srt:AffiliatedEntityMemberahl:ManagementFeesAssociatedwithInvestmentFundsMember2020-07-012020-09-300001527469srt:AffiliatedEntityMemberahl:ManagementFeesAssociatedwithInvestmentFundsMember2019-07-012019-09-300001527469srt:AffiliatedEntityMemberahl:ManagementFeesAssociatedwithInvestmentFundsMember2020-01-012020-09-300001527469srt:AffiliatedEntityMemberahl:ManagementFeesAssociatedwithInvestmentFundsMember2019-01-012019-09-300001527469srt:AffiliatedEntityMemberahl:ManagementFeesAssociatedwithInvestmentFundsMember2020-09-300001527469srt:AffiliatedEntityMemberahl:ManagementFeesAssociatedwithInvestmentFundsMember2019-12-310001527469srt:AffiliatedEntityMemberahl:PurchaseofResidentialMortgageLoansUnderAgreementMemberahl:AmeriHomeMember2020-07-012020-09-300001527469srt:AffiliatedEntityMemberahl:PurchaseofResidentialMortgageLoansUnderAgreementMemberahl:AmeriHomeMember2019-07-012019-09-300001527469srt:AffiliatedEntityMemberahl:PurchaseofResidentialMortgageLoansUnderAgreementMemberahl:AmeriHomeMember2020-01-012020-09-300001527469srt:AffiliatedEntityMemberahl:PurchaseofResidentialMortgageLoansUnderAgreementMemberahl:AmeriHomeMember2019-01-012019-09-300001527469ahl:AmeriHomeMembersrt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2020-09-300001527469ahl:AmeriHomeMembersrt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469srt:AffiliatedEntityMemberahl:AAMortgageOpportunitiesLPMemberus-gaap:InvestmentsMember2020-09-300001527469ahl:AmeriHomeMemberus-gaap:SubsequentEventMember2020-10-260001527469ahl:MidCapHoldingsMembersrt:AffiliatedEntityMemberus-gaap:RedeemablePreferredStockMember2020-07-012020-09-300001527469ahl:MidCapHoldingsMembersrt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2020-09-300001527469ahl:MidCapHoldingsMembersrt:AffiliatedEntityMemberus-gaap:AssetBackedSecuritiesMember2019-12-310001527469ahl:MidCapHoldingsMembersrt:AffiliatedEntityMember2020-09-300001527469ahl:MidCapHoldingsMembersrt:AffiliatedEntityMember2019-12-310001527469ahl:MidCapHoldingsMembersrt:AffiliatedEntityMemberus-gaap:RedeemablePreferredStockMember2020-09-300001527469ahl:MidCapHoldingsMembersrt:AffiliatedEntityMemberus-gaap:RedeemablePreferredStockMember2019-12-310001527469ahl:MidCapHoldingsMembersrt:AffiliatedEntityMember2020-09-300001527469ahl:MidCapHoldingsMembersrt:AffiliatedEntityMember2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:PrivateEquityFundsMemberahl:AthoraHoldingLtd.Member2020-01-012020-09-300001527469ahl:FundingAgreementsMembersrt:AffiliatedEntityMemberahl:AthoraHoldingLtd.Member2020-09-300001527469ahl:FundingAgreementsMembersrt:AffiliatedEntityMemberahl:AthoraHoldingLtd.Member2019-12-310001527469srt:AffiliatedEntityMemberus-gaap:InvestmentsMemberahl:AthoraHoldingLtd.Member2020-09-300001527469srt:AffiliatedEntityMemberahl:VenerableHoldingsInc.Member2020-09-300001527469ahl:ApolloAtheneStrategicPartnershipAdvisorsLLCMembersrt:AffiliatedEntityMember2020-09-300001527469us-gaap:VariableInterestEntityPrimaryBeneficiaryMemberahl:ApolloAtheneStrategicPartnershipAdvisorsLLCMembersrt:AffiliatedEntityMember2020-09-300001527469us-gaap:VariableInterestEntityPrimaryBeneficiaryMemberahl:ApolloAtheneStrategicPartnershipAdvisorsLLCMembersrt:AffiliatedEntityMember2019-12-310001527469srt:AffiliatedEntityMemberahl:PKAirFinanceMember2020-09-300001527469srt:AffiliatedEntityMemberahl:PKAirFinanceMember2019-12-310001527469srt:AffiliatedEntityMemberahl:PKAirFinanceMemberus-gaap:InvestmentsMember2020-09-300001527469ahl:AtheneCoInvestReinsuranceAffiliate1ALtd.Member2020-06-3000015274692020-04-012020-04-010001527469ahl:AtheneCoInvestReinsuranceAffiliate1ALtd.Member2020-09-300001527469ahl:AtheneCoInvestReinsuranceAffiliate1ALtd.Member2020-04-010001527469us-gaap:CommonClassAMembersrt:AffiliatedEntityMemberahl:ApolloOperatingGroupMemberahl:ExchangeofstockMember2020-02-280001527469srt:AffiliatedEntityMemberahl:ApolloOperatingGroupMember2020-02-280001527469us-gaap:CommonClassAMembersrt:AffiliatedEntityMemberahl:ApolloOperatingGroupMember2020-02-280001527469us-gaap:CommonClassAMembersrt:AffiliatedEntityMemberahl:ApolloOperatingGroupMember2020-01-012020-09-300001527469ahl:AAInfrastructureMembersrt:AffiliatedEntityMember2020-09-300001527469ahl:AAInfrastructureMembersrt:AffiliatedEntityMember2019-12-310001527469ahl:AAInfrastructureMembersrt:AffiliatedEntityMemberus-gaap:InvestmentsMember2020-09-300001527469us-gaap:InvestmentsMember2020-09-300001527469us-gaap:InvestmentsMember2019-12-310001527469ahl:FundingAgreementsMemberahl:AtheneGlobalFundingMember2020-09-300001527469ahl:FundingAgreementsMemberahl:AtheneGlobalFundingMember2019-12-310001527469us-gaap:SeniorNotesMemberahl:AtheneGlobalFundingMember2020-09-300001527469ahl:FundingAgreementBackedRepurchaseAgreementsMember2020-09-3000015274692020-01-012020-03-310001527469us-gaap:PendingLitigationMemberahl:CalderaMember2020-01-012020-09-30ahl:segment0001527469us-gaap:OperatingSegmentsMemberahl:RetirementServicesMember2020-07-012020-09-300001527469us-gaap:OperatingSegmentsMemberahl:RetirementServicesMember2019-07-012019-09-300001527469us-gaap:OperatingSegmentsMemberahl:RetirementServicesMember2020-01-012020-09-300001527469us-gaap:OperatingSegmentsMemberahl:RetirementServicesMember2019-01-012019-09-300001527469us-gaap:OperatingSegmentsMemberus-gaap:CorporateAndOtherMember2020-07-012020-09-300001527469us-gaap:OperatingSegmentsMemberus-gaap:CorporateAndOtherMember2019-07-012019-09-300001527469us-gaap:OperatingSegmentsMemberus-gaap:CorporateAndOtherMember2020-01-012020-09-300001527469us-gaap:OperatingSegmentsMemberus-gaap:CorporateAndOtherMember2019-01-012019-09-300001527469us-gaap:MaterialReconcilingItemsMember2020-07-012020-09-300001527469us-gaap:MaterialReconcilingItemsMember2019-07-012019-09-300001527469us-gaap:MaterialReconcilingItemsMember2020-01-012020-09-300001527469us-gaap:MaterialReconcilingItemsMember2019-01-012019-09-300001527469ahl:RetirementServicesMember2020-09-300001527469ahl:RetirementServicesMember2019-12-310001527469us-gaap:CorporateAndOtherMember2020-09-300001527469us-gaap:CorporateAndOtherMember2019-12-31
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
UNITED STATES SECURITIES AND EXCHANGE COMMISSION |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Washington, D.C. 20549 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
FORM 10-Q
☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended September 30, 2020
or
☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
Commission File Number: 001-37963
ATHENE HOLDING LTD.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(Exact name of registrant as specified in its charter) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Bermuda |
|
|
|
|
|
98-0630022 |
|
|
(State or other jurisdiction of |
|
|
|
|
|
(I.R.S. Employer |
|
|
incorporation or organization) |
|
|
|
|
|
Identification Number) |
|
96 Pitts Bay Road
Pembroke, HM 08, Bermuda
(441) 279-8400
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Securities registered pursuant to Section 12(b) of the Act: |
Title of each class |
|
Trading Symbol |
|
Name of each exchange on which registered |
Class A common shares, par value $0.001 per share |
|
ATH |
|
New York Stock Exchange |
|
|
|
|
|
Depositary Shares, each representing a 1/1,000th interest in a
|
|
|
|
|
6.35% Fixed-to-Floating Rate Perpetual Non-Cumulative Preference Share, Series A |
|
ATHPrA |
|
New York Stock Exchange |
|
|
|
|
|
Depositary Shares, each representing a 1/1,000th interest in a
|
|
|
|
|
5.625% Fixed Rate Perpetual Non-Cumulative Preference Share, Series B |
|
ATHPrB |
|
New York Stock Exchange |
|
|
|
|
|
|
|
|
|
|
|
|
Depositary Shares, each representing a 1/1,000th interest in a
|
|
|
|
|
6.375% Fixed-Rate Reset Perpetual Non-Cumulative Preference Share, Series C |
|
ATHPrC |
|
New York Stock Exchange |
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days. Yes ☑ No ☐
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☑ No ☐
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company or an emerging growth company. See definitions of “large accelerated filer,” “accelerated filer”, “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Large accelerated filer |
☑ |
Accelerated filer ☐ |
Non-accelerated filer ☐ |
Smaller reporting company |
☐ |
Emerging growth company |
☐ |
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☑
As of October 31, 2020, 191,463,918 of our Class A common shares were outstanding.
TABLE OF CONTENTS
PART I—FINANCIAL INFORMATION
PART II—OTHER INFORMATION
As used in this Quarterly Report on Form 10-Q (report), unless the context otherwise indicates, any reference to “Athene,” “our Company,” “the Company,” “us,” “we” and “our” refer to Athene Holding Ltd. together with its consolidated subsidiaries and any reference to “AHL” refers to Athene Holding Ltd. only.
Forward-Looking Statements
Certain statements in this report are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended (Securities Act), and Section 21E of the Securities Exchange Act of 1934, as amended (Exchange Act). You can identify forward-looking statements by the fact that they do not relate strictly to historical or current facts. These statements may include words such as “anticipate,” “estimate,” “expect,” “project,” “plan,” “intend,” “seek,” “assume,” “believe,” “may,” “will,” “should,” “could,” “would,” “likely” and other words and terms of similar meaning, including the negative of these or similar words and terms, in connection with any discussion of the timing or nature of future operating or financial performance or other events. However, not all forward-looking statements contain these identifying words. Forward-looking statements appear in a number of places throughout and give our current expectations and projections relating to our business, financial condition, results of operations, plans, strategies, objectives, future performance and other matters.
We caution you that forward-looking statements are not guarantees of future performance and that our actual consolidated financial condition, results of operations, liquidity, cash flows and performance may differ materially from that made in or suggested by the forward-looking statements contained in this report. A number of important factors could cause actual results or conditions to differ materially from those contained or implied by the forward-looking statements, including the risks discussed in Part II–Item 1A. Risk Factors included in this report and Part I–Item 1A. Risk Factors included in our Annual Report on Form 10-K for the year ended December 31, 2019 (2019 Annual Report). Factors that could cause actual results or conditions to differ from those reflected in the forward-looking statements contained in this report include:
•the accuracy of management’s assumptions and estimates;
•variability in the amount of statutory capital that our insurance and reinsurance subsidiaries have or are required to hold;
•interest rate and/or foreign currency fluctuations;
•our potential need for additional capital in the future and the potential unavailability of such capital to us on favorable terms or at all;
•major public health issues, and specifically the pandemic caused by the effects of the spread of the Coronavirus Disease of 2019 (COVID-19);
•changes in relationships with important parties in our product distribution network;
•the activities of our competitors and our ability to grow our retail business in a highly competitive environment;
•the impact of general economic conditions on our ability to sell our products and on the fair value of our investments;
•our ability to successfully acquire new companies or businesses and/or integrate such acquisitions into our existing framework;
•downgrades, potential downgrades or other negative actions by rating agencies;
•our dependence on key executives and inability to attract qualified personnel, or the potential loss of Bermudian personnel as a result of Bermuda employment restrictions;
•market and credit risks that could diminish the value of our investments;
•changes to the creditworthiness of our reinsurance and derivative counterparties;
•the discontinuation of London Inter-bank Offered Rate (LIBOR);
•changes in consumer perception regarding the desirability of annuities as retirement savings products;
•potential litigation (including class action litigation), enforcement investigations or regulatory scrutiny against us and our subsidiaries, which we may be required to defend against or respond to;
•the impact of new accounting rules or changes to existing accounting rules on our business;
•interruption or other operational failures in telecommunication and information technology and other operating systems, as well as our ability to maintain the security of those systems;
•the termination by Apollo Global Management, Inc. (AGM) or any of its subsidiaries (collectively, AGM together with its subsidiaries, Apollo) of its investment management agreements with us and limitations on our ability to terminate such arrangements;
•Apollo’s dependence on key executives and inability to attract qualified personnel;
•the accuracy of our estimates regarding the future performance of our investment portfolio;
•increased regulation or scrutiny of alternative investment advisers and certain trading methods;
•potential changes to regulations affecting, among other things, transactions with our affiliates, the ability of our subsidiaries to make dividend payments or distributions to AHL, acquisitions by or of us, minimum capitalization and statutory reserve requirements for insurance companies and fiduciary obligations on parties who distribute our products;
•the failure to obtain or maintain licenses and/or other regulatory approvals as required for the operation of our insurance subsidiaries;
•the 2020 presidential and congressional elections in the US resulting in changes in the US political environment that are unfavorable to us;
•increases in our tax liability resulting from the Base Erosion and Anti-Abuse Tax (BEAT);
•improper interpretation or application of Public Law no. 115-97, the Act to provide for reconciliation pursuant to titles II and V of the concurrent resolution on the budget for fiscal year 2018 (Tax Act) or subsequent changes to, clarifications of or guidance under the Tax Act that is counter to our interpretation and has retroactive effect;
•AHL or any of its non-United States (US) subsidiaries becoming subject to US federal income taxation;
•adverse changes in US tax law;
•our being subject to US withholding tax under the Foreign Account Tax Compliance Act (FATCA);
•changes in our ability to pay dividends or make distributions;
•our failure to recognize the benefits expected to be derived from the share exchange transaction with Apollo;
•the failure to achieve the economic benefits expected to be derived from the Athene Co-Invest Reinsurance Affiliate 1A Ltd. (together with its subsidiaries, ACRA) capital raise or future ACRA capital raises;
•the failure of third-party ACRA investors to fund their capital commitment obligations; and
•other risks and factors listed in Part II–Item 1A. Risk Factors included in this report, Part I—Item 1A. Risk Factors included in our 2019 Annual Report and those discussed elsewhere in this report and in our 2019 Annual Report.
We caution you that the important factors referenced above may not be exhaustive. In light of these risks, you should not place undue reliance upon any forward-looking statements contained in this report. Unless an earlier date is specified, the forward-looking statements included in this report are made only as of the date that this report was filed with the US Securities and Exchange Commission (SEC). We undertake no obligation, except as may be required by law, to publicly update or revise any forward-looking statement as a result of new information, future events or otherwise. Comparisons of results for current and any prior periods are not intended to express any future trends, or indications of future performance, unless expressed as such, and should only be viewed as historical data.
GLOSSARY OF SELECTED TERMS
Unless otherwise indicated in this report, the following terms have the meanings set forth below:
Entities
|
|
|
|
|
|
|
|
|
Term or Acronym |
|
Definition |
A-A Mortgage |
|
A-A Mortgage Opportunities, L.P. |
|
|
|
AAA Investor |
|
AAA Guarantor – Athene, L.P. |
|
|
|
AAIA |
|
Athene Annuity and Life Company |
AARe |
|
Athene Annuity Re Ltd., a Bermuda reinsurance subsidiary |
ACRA |
|
Athene Co-Invest Reinsurance Affiliate 1A Ltd., together with its subsidiaries |
ADIP |
|
Apollo/Athene Dedicated Investment Program |
AGM |
|
Apollo Global Management, Inc. |
AHL |
|
Athene Holding Ltd. |
ALRe |
|
Athene Life Re Ltd., a Bermuda reinsurance subsidiary |
ALReI |
|
Athene Life Re International Ltd., a Bermuda reinsurance subsidiary |
AmeriHome |
|
AmeriHome Mortgage Company, LLC |
AOG |
|
Apollo Operating Group |
Apollo |
|
Apollo Global Management, Inc., together with its subsidiaries |
Apollo Group |
|
(1) Apollo, (2) the AAA Investor, (3) any investment fund or other collective investment vehicle whose general partner or managing member is owned, directly or indirectly, by Apollo or one or more of Apollo’s subsidiaries, (4) BRH Holdings GP, Ltd. and its shareholders, (5) any executive officer or employee of AGM or its subsidiaries (6) any shareholder that has granted to AGM or any of its affiliates a valid proxy with respect to all of such shareholder’s Class A common shares pursuant to our bye-laws and (7) any affiliate of any of the foregoing (except that AHL or its subsidiaries are not members of the Apollo Group) |
Athene USA |
|
Athene USA Corporation |
Athora |
|
Athora Holding Ltd. |
BMA |
|
Bermuda Monetary Authority |
|
|
|
CoInvest VI |
|
AAA Investments (Co-Invest VI), L.P. |
CoInvest VII |
|
AAA Investments (Co-Invest VII), L.P. |
|
|
|
ISG |
|
Apollo Insurance Solutions Group LP, formerly known as Athene Asset Management LLC |
Jackson |
|
Jackson National Life Insurance Company |
LIMRA |
|
Life Insurance and Market Research Association |
MidCap |
|
MidCap FinCo Designated Activity Company |
NAIC |
|
National Association of Insurance Commissioners |
NYSDFS |
|
New York State Department of Financial Services |
RLI |
|
ReliaStar Life Insurance Company |
Treasury |
|
United States Department of the Treasury |
VIAC |
|
Venerable Insurance and Annuity Company, formerly Voya Insurance and Annuity Company |
Venerable |
|
Venerable Holdings, Inc., together with its subsidiaries |
Certain Terms & Acronyms
|
|
|
|
|
|
|
|
|
Term or Acronym |
|
Definition |
ABS |
|
Asset-backed securities |
ACL |
|
Authorized control level RBC as defined by the model created by the National Association of Insurance Commissioners |
ALM |
|
Asset liability management |
ALRe RBC |
|
The risk-based capital ratio using Bermuda capital and applying NAIC risk-based capital factors to the statutory financial statements of AHL’s non-US reinsurance subsidiaries on an aggregate basis. Adjustments are made to (i) exclude US subsidiaries which are included within our US RBC Ratio, (ii) exclude our interests in the AOG units and other non-insurance subsidiary holding companies from our capital base and (iii) limit RBC concentration charges such that when they are applied to determine target capital, the charges do not exceed 100% of the asset’s carrying value. |
Alternative investments |
|
Alternative investments, including investment funds, CLO equity positions and certain other debt instruments considered to be equity-like |
Base of earnings |
|
Earnings generated from our results of operations and the underlying profitability drivers of our business |
|
|
|
Bermuda capital |
|
The capital of Athene’s non-US reinsurance subsidiaries calculated under US statutory accounting principles, including that for policyholder reserve liabilities which are subjected to US cash flow testing requirements, but (i) excluding certain items that do not exist under our applicable Bermuda requirements, such as interest maintenance reserves and (ii) including certain Bermuda statutory accounting differences, such as marking to market of inception date investment gains or losses relating to reinsurance transactions. Bermuda capital may from time to time materially differ from the calculation of statutory capital under US statutory accounting principles primarily due to the foregoing differences. |
Block reinsurance |
|
A transaction in which the ceding company cedes all or a portion of a block of previously issued annuity contracts through a reinsurance agreement |
BSCR |
|
Bermuda Solvency Capital Requirement |
CAL |
|
Company action level risk-based capital as defined by the model created by the National Association of Insurance Commissioners |
CLO |
|
Collateralized loan obligation |
CMBS |
|
Commercial mortgage-backed securities |
CML |
|
Commercial mortgage loans |
Cost of crediting |
|
The interest credited to the policyholders on our fixed annuities, including, with respect to our fixed indexed annuities, option costs, as well as institutional costs related to institutional products, presented on an annualized basis for interim periods |
Cost of funds |
|
Cost of funds includes liability costs related to cost of crediting on both deferred annuities and institutional products, as well as other liability costs. Cost of funds is computed as the total liability costs divided by the average net invested assets for the relevant period. Presented on an annualized basis for interim periods. |
DAC |
|
Deferred acquisition costs |
Deferred annuities |
|
Fixed indexed annuities, annual reset annuities, multi-year guaranteed annuities and registered index-linked annuities |
DSI |
|
Deferred sales inducement |
Excess capital |
|
Capital in excess of the level management believes is needed to support our current operating strategy |
FIA |
|
Fixed indexed annuity, which is an insurance contract that earns interest at a crediting rate based on a specified index on a tax-deferred basis |
Fixed annuities |
|
FIAs together with fixed rate annuities |
Fixed rate annuity |
|
An insurance contract that offers tax-deferred growth and the opportunity to produce a guaranteed stream of retirement income for the lifetime of its policyholder |
Flow reinsurance |
|
A transaction in which the ceding company cedes a portion of newly issued policies to the reinsurer |
GAAP |
|
Accounting principles generally accepted in the United States of America |
GLWB |
|
Guaranteed lifetime withdrawal benefit |
GMDB |
|
Guaranteed minimum death benefit |
Gross invested assets |
|
The sum of (a) total investments on the consolidated balance sheet with available-for-sale securities at amortized cost, excluding derivatives, (b) cash and cash equivalents and restricted cash, (c) investments in related parties, (d) accrued investment income, (e) consolidated variable interest entities’ assets, liabilities and noncontrolling interest and (f) policy loans ceded (which offset the direct policy loans in total investments). Gross invested assets includes investments supporting assumed funds withheld and modco agreements and excludes assets associated with funds withheld liabilities related to business exited through reinsurance agreements and derivative collateral (offsetting the related cash positions). Gross invested assets includes the entire investment balance attributable to ACRA as ACRA is 100% consolidated |
|
|
|
|
|
|
|
|
|
Term or Acronym |
|
Definition |
IMA |
|
Investment management agreement |
IMO |
|
Independent marketing organization |
Investment margin on deferred annuities |
|
Investment margin applies to deferred annuities and is the excess of our net investment earned rate over the cost of crediting to our policyholders, presented on an annualized basis for interim periods |
Liability outflows |
|
The aggregate of withdrawals on our deferred annuities, maturities of our funding agreements, payments on payout annuities, and pension risk benefit payments |
|
|
|
MMS |
|
Minimum margin of solvency |
Modco |
|
Modified coinsurance |
MVA |
|
Market value adjustment |
MYGA |
|
Multi-year guaranteed annuity |
Net invested assets |
|
The sum of (a) total investments on the consolidated balance sheet with available-for-sale securities at amortized cost, excluding derivatives, (b) cash and cash equivalents and restricted cash, (c) investments in related parties, (d) accrued investment income, (e) consolidated variable interest entities’ assets, liabilities and noncontrolling interest and (f) policy loans ceded (which offset the direct policy loans in total investments). Net invested assets includes investments supporting assumed funds withheld and modco agreements and excludes assets associated with funds withheld liabilities related to business exited through reinsurance agreements and derivative collateral (offsetting the related cash positions). Net invested assets includes our economic ownership of ACRA investments but does not include the investments associated with the noncontrolling interest |
Net investment earned rate |
|
Income from our net invested assets divided by the average net invested assets for the relevant period, presented on an annualized basis for interim periods |
Net investment spread |
|
Net investment spread measures our investment performance less the total cost of our liabilities, presented on an annualized basis for interim periods |
Net reserve liabilities |
|
The sum of (a) interest sensitive contract liabilities, (b) future policy benefits, (c) dividends payable to policyholders, and (d) other policy claims and benefits, offset by reinsurance recoverable, excluding policy loans ceded. Net reserve liabilities also includes the reserves related to assumed modco agreements in order to appropriately match the costs incurred in the consolidated statements of income with the liabilities. Net reserve liabilities is net of the ceded liabilities to third-party reinsurers as the costs of the liabilities are passed to such reinsurers and therefore we have no net economic exposure to such liabilities, assuming our reinsurance counterparties perform under our agreements. Net reserve liabilities is net of the reserve liabilities attributable to the ACRA noncontrolling interest |
Other liability costs |
|
Other liability costs include DAC, DSI and VOBA amortization, change in rider reserves, the cost of liabilities on products other than deferred annuities and institutional products, excise taxes, as well as offsets for premiums, product charges and other revenues |
OTTI |
|
Other-than-temporary impairment |
Payout annuities |
|
Annuities with a current cash payment component, which consist primarily of single premium immediate annuities, supplemental contracts and structured settlements |
Policy loan |
|
A loan to a policyholder under the terms of, and which is secured by, a policyholder’s policy |
PRT |
|
Pension risk transfer |
RBC |
|
Risk-based capital |
Rider reserves |
|
Guaranteed lifetime withdrawal benefits and guaranteed minimum death benefits reserves |
RMBS |
|
Residential mortgage-backed securities |
RML |
|
Residential mortgage loan |
Sales |
|
All money paid into an individual annuity, including money paid into new contracts with initial purchase occurring in the specified period and existing contracts with initial purchase occurring prior to the specified period (excluding internal transfers) |
SPIA |
|
Single premium immediate annuity |
Surplus assets |
|
Assets in excess of policyholder obligations, determined in accordance with the applicable domiciliary jurisdiction’s statutory accounting principles |
TAC |
|
Total adjusted capital as defined by the model created by the NAIC |
US RBC Ratio |
|
The CAL RBC ratio for AADE, our parent US insurance company |
VIE |
|
Variable interest entity |
VOBA |
|
Value of business acquired |
Item 1. Financial Statements
Index to Condensed Consolidated Financial Statements (unaudited)
ATHENE HOLDING LTD.
Condensed Consolidated Balance Sheets (Unaudited)
|
|
|
|
|
|
|
|
|
|
|
|
(In millions) |
September 30, 2020 |
|
December 31, 2019 |
Assets |
|
|
|
Investments |
|
|
|
Available-for-sale securities, at fair value (amortized cost: 2020 – $69,160 and 2019 – $67,479; allowance for credit losses: 2020 – $140) |
$ |
73,988 |
|
|
$ |
71,374 |
|
Trading securities, at fair value (consolidated variable interest entities: 2020 – $0 and 2019 – $16) |
2,069 |
|
|
2,070 |
|
Equity securities (portion at fair value: 2020 – $265 and 2019 – $247) |
697 |
|
|
247 |
|
Mortgage loans (allowance for credit losses: 2020 – $313 and 2019 – $11; portion at fair value: 2020 – $19 and 2019 – $27; consolidated variable interest entities: 2020 – $1,879 and 2019 – $0) |
14,591 |
|
|
14,306 |
|
Investment funds (portion at fair value: 2020 – $156 and 2019 – $154; consolidated variable interest entities: 2020 – $0 and 2019 – $19) |
723 |
|
|
750 |
|
Policy loans |
387 |
|
|
417 |
|
Funds withheld at interest (portion at fair value: 2020 – $1,259 and 2019 – $801) |
48,593 |
|
|
15,181 |
|
Derivative assets |
2,771 |
|
|
2,888 |
|
Short-term investments (portion at fair value: 2020 – $165 and 2019 – $406) |
165 |
|
|
596 |
|
Other investments (allowance for credit losses: 2020 – $8; portion at fair value: 2020 – $109 and 2019 – $93) |
949 |
|
|
158 |
|
Total investments |
144,933 |
|
|
107,987 |
|
Cash and cash equivalents (consolidated variable interest entities: 2020 – $0 and 2019 – $3) |
7,548 |
|
|
4,240 |
|
Restricted cash |
1,226 |
|
|
402 |
|
Investments in related parties |
|
|
|
Available-for-sale securities, at fair value (amortized cost: 2020 – $4,861 and 2019 – $3,783; allowance for credit losses: 2020 – $2) |
4,857 |
|
|
3,804 |
|
Trading securities, at fair value |
1,397 |
|
|
785 |
|
Equity securities, at fair value (consolidated variable interest entities: 2020 – $0 and 2019 – $6) |
50 |
|
|
64 |
|
Mortgage loans (allowance for credit losses: 2020 – $15 and 2019 – $0) |
640 |
|
|
653 |
|
Investment funds (portion at fair value: 2020 – $1,850 and 2019 – $819; consolidated variable interest entities: 2020 – $0 and 2019 – $664) |
4,808 |
|
|
3,550 |
|
Funds withheld at interest (portion at fair value: 2020 – $721 and 2019 – $594) |
13,053 |
|
|
13,220 |
|
|
|
|
|
Other investments (allowance for credit losses: 2020 – $5) |
467 |
|
|
487 |
|
Accrued investment income (related party: 2020 – $38 and 2019 – $27) |
796 |
|
|
807 |
|
Reinsurance recoverable (portion at fair value: 2020 – $2,155 and 2019 – $1,821) |
5,104 |
|
|
4,863 |
|
Deferred acquisition costs, deferred sales inducements and value of business acquired |
5,165 |
|
|
5,008 |
|
Other assets (consolidated variable interest entities: 2020 – $1 and 2019 – $20) |
1,044 |
|
|
1,005 |
|
Total assets |
$ |
191,088 |
|
|
$ |
146,875 |
|
(Continued)
See accompanying notes to the unaudited condensed consolidated financial statements
ATHENE HOLDING LTD.
Condensed Consolidated Balance Sheets (Unaudited)
|
|
|
|
|
|
|
|
|
|
|
|
(In millions, except per share data) |
September 30, 2020 |
|
December 31, 2019 |
Liabilities and Equity |
|
|
|
Liabilities |
|
|
|
Interest sensitive contract liabilities (related party: 2020 – $14,352 and 2019 – $15,285; portion at fair value: 2020 – $13,104 and 2019 – $11,992) |
$ |
141,207 |
|
|
$ |
102,745 |
|
Future policy benefits (related party: 2020 – $1,527 and 2019 – $1,302; portion at fair value: 2020 – $2,354 and 2019 – $2,301) |
24,823 |
|
|
23,330 |
|
Other policy claims and benefits (related party: 2020 – $2 and 2019 – $13) |
118 |
|
|
138 |
|
Dividends payable to policyholders |
110 |
|
|
113 |
|
Short-term debt |
— |
|
|
475 |
|
Long-term debt |
1,487 |
|
|
992 |
|
Derivative liabilities |
147 |
|
|
97 |
|
Payables for collateral on derivatives and securities to repurchase |
3,742 |
|
|
3,255 |
|
Funds withheld liability (portion at fair value: 2020 – $50 and 2019 – $31) |
440 |
|
|
408 |
|
Other liabilities (related party: 2020 – $92 and 2019 – $79; consolidated variable interest entities: 2020 – $134 and 2019 – $0) |
1,897 |
|
|
1,181 |
|
Total liabilities |
173,971 |
|
|
132,734 |
|
Commitments and Contingencies (Note 12) |
|
|
|
Equity |
|
|
|
Preferred stock |
|
|
|
Series A – par value $1 per share; $863 aggregate liquidation preference; authorized, issued and outstanding: 2020 and 2019 – 0.0 shares |
— |
|
|
— |
|
Series B – par value $1 per share; $345 aggregate liquidation preference; authorized, issued and outstanding: 2020 and 2019 – 0.0 shares |
— |
|