$ath-pa 2018 Q4 10-K

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2016	ahl	Annuity Deposit Revenue Gross AnnuityDepositRevenueGross	9018000000	USD
CY2017	ahl	Annuity Deposit Revenue Gross AnnuityDepositRevenueGross	9546000000	USD
CY2018	ahl	Annuity Deposit Revenue Gross AnnuityDepositRevenueGross	36663000000	USD
CY2017Q4	ahl	Certain Loans Acquiredin Transfer Accountedforas Availableforsale Debt Securities Amortized Cost CertainLoansAcquiredinTransferAccountedforasAvailableforsaleDebtSecuritiesAmortizedCost	6168000000	USD
CY2018Q4	ahl	Certain Loans Acquiredin Transfer Accountedforas Availableforsale Debt Securities Amortized Cost CertainLoansAcquiredinTransferAccountedforasAvailableforsaleDebtSecuritiesAmortizedCost	5518000000	USD
CY2017Q4	ahl	Certain Loans Acquiredin Transfer Accountedforas Availableforsale Debt Securities Cash Flows Expectedtobe Collected CertainLoansAcquiredinTransferAccountedforasAvailableforsaleDebtSecuritiesCashFlowsExpectedtobeCollected	8188000000	USD
CY2018Q4	ahl	Certain Loans Acquiredin Transfer Accountedforas Availableforsale Debt Securities Cash Flows Expectedtobe Collected CertainLoansAcquiredinTransferAccountedforasAvailableforsaleDebtSecuritiesCashFlowsExpectedtobeCollected	7195000000	USD
CY2017Q4	ahl	Certain Loans Acquiredin Transfer Accountedforas Availableforsale Debt Securities Contractually Required Payments Receivable CertainLoansAcquiredinTransferAccountedforasAvailableforsaleDebtSecuritiesContractuallyRequiredPaymentsReceivable	9690000000	USD
CY2018Q4	ahl	Certain Loans Acquiredin Transfer Accountedforas Availableforsale Debt Securities Contractually Required Payments Receivable CertainLoansAcquiredinTransferAccountedforasAvailableforsaleDebtSecuritiesContractuallyRequiredPaymentsReceivable	8179000000	USD
CY2017Q4	ahl	Certain Loans Acquiredin Transfer Not Accountedforas Debt Securities Cash Flows Expectedtobe Collected CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesCashFlowsExpectedtobeCollected	1090000000	USD
CY2018Q4	ahl	Certain Loans Acquiredin Transfer Not Accountedforas Debt Securities Cash Flows Expectedtobe Collected CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesCashFlowsExpectedtobeCollected	2628000000	USD
CY2017Q4	ahl	Certain Loans Acquiredin Transfer Not Accountedforas Debt Securities Contractually Required Payments Receivable CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesContractuallyRequiredPaymentsReceivable	1140000000	USD
CY2018Q4	ahl	Certain Loans Acquiredin Transfer Not Accountedforas Debt Securities Contractually Required Payments Receivable CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesContractuallyRequiredPaymentsReceivable	2675000000	USD
CY2017Q4	ahl	Certain Loans Acquiredin Transfer Not Accountedforas Debt Securities Fair Value CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesFairValue	844000000	USD
CY2018Q4	ahl	Certain Loans Acquiredin Transfer Not Accountedforas Debt Securities Fair Value CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesFairValue	1933000000	USD
CY2016	ahl	Changein Accumulated Other Comprehensive Income ChangeinAccumulatedOtherComprehensiveIncome	607000000	USD
CY2017	ahl	Changein Accumulated Other Comprehensive Income ChangeinAccumulatedOtherComprehensiveIncome	1083000000	USD
CY2018	ahl	Changein Accumulated Other Comprehensive Income ChangeinAccumulatedOtherComprehensiveIncome	-1921000000	USD
CY2018	ahl	Closed Block Numberof Predecessor Entities Reorganized ClosedBlockNumberofPredecessorEntitiesReorganized	2
CY2018Q4	ahl	Common Stock Additional Shares Authorized CommonStockAdditionalSharesAuthorized	150000000	shares
CY2018	ahl	Common Stock Voting Rights Maximum Voting Powerfor Related Party Group CommonStockVotingRightsMaximumVotingPowerforRelatedPartyGroup	0.03
CY2018	ahl	Common Stock Voting Rights Maximum Voting Powerfor Single Shareholder CommonStockVotingRightsMaximumVotingPowerforSingleShareholder	0.099
CY2015Q4	ahl	Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfits	2656000000	USD
CY2016Q4	ahl	Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfits	2959000000	USD
CY2017Q4	ahl	Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfits	2972000000	USD
CY2018Q4	ahl	Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfits	5907000000	USD
CY2016	ahl	Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Additions DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsAdditions	801000000	USD
CY2017	ahl	Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Additions DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsAdditions	654000000	USD
CY2018	ahl	Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Additions DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsAdditions	2745000000	USD
CY2016	ahl	Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Amortization Expense Excluding Unlocking DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsAmortizationExpenseExcludingUnlocking	305000000	USD
CY2017	ahl	Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Amortization Expense Excluding Unlocking DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsAmortizationExpenseExcludingUnlocking	423000000	USD
CY2018	ahl	Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Amortization Expense Excluding Unlocking DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsAmortizationExpenseExcludingUnlocking	310000000	USD
CY2016	ahl	Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Unrealized Investment Gains Losses DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsUnrealizedInvestmentGainsLosses	155000000	USD
CY2017	ahl	Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Unrealized Investment Gains Losses DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsUnrealizedInvestmentGainsLosses	234000000	USD
CY2018	ahl	Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Unrealized Investment Gains Losses DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsUnrealizedInvestmentGainsLosses	-418000000	USD
CY2017Q4	ahl	Deferred Tax Liabilities Unrealized Gainson Availableforsale Securities DeferredTaxLiabilitiesUnrealizedGainsonAvailableforsaleSecurities	325000000	USD
CY2018Q4	ahl	Deferred Tax Liabilities Unrealized Gainson Availableforsale Securities DeferredTaxLiabilitiesUnrealizedGainsonAvailableforsaleSecurities	0	USD
CY2017Q4	ahl	Derivative Asset Fair Value Offset Against Collateral Netof Not Subjectto Master Netting Arrangement Policy Election Excluding Obligationto Return Securities DerivativeAssetFairValueOffsetAgainstCollateralNetofNotSubjecttoMasterNettingArrangementPolicyElectionExcludingObligationtoReturnSecurities	169000000	USD
CY2018Q4	ahl	Derivative Asset Fair Value Offset Against Collateral Netof Not Subjectto Master Netting Arrangement Policy Election Excluding Obligationto Return Securities DerivativeAssetFairValueOffsetAgainstCollateralNetofNotSubjecttoMasterNettingArrangementPolicyElectionExcludingObligationtoReturnSecurities	22000000	USD
CY2017Q4	ahl	Derivative Asset Including Embedded Derivatives DerivativeAssetIncludingEmbeddedDerivatives	2863000000	USD
CY2018Q4	ahl	Derivative Asset Including Embedded Derivatives DerivativeAssetIncludingEmbeddedDerivatives	990000000	USD
CY2017Q4	ahl	Derivative Liabilities Including Embedded Derivatives DerivativeLiabilitiesIncludingEmbeddedDerivatives	7567000000	USD
CY2018Q4	ahl	Derivative Liabilities Including Embedded Derivatives DerivativeLiabilitiesIncludingEmbeddedDerivatives	8053000000	USD
CY2017Q4	ahl	Derivative Liability Fair Value Offset Against Collateral Netof Not Subjectto Master Netting Arrangement Policy Election Excluding Rightto Reclaim Securities DerivativeLiabilityFairValueOffsetAgainstCollateralNetofNotSubjecttoMasterNettingArrangementPolicyElectionExcludingRighttoReclaimSecurities	12000000	USD
CY2018Q4	ahl	Derivative Liability Fair Value Offset Against Collateral Netof Not Subjectto Master Netting Arrangement Policy Election Excluding Rightto Reclaim Securities DerivativeLiabilityFairValueOffsetAgainstCollateralNetofNotSubjecttoMasterNettingArrangementPolicyElectionExcludingRighttoReclaimSecurities	9000000	USD
CY2017Q4	ahl	Derivativeassetspledgedascollateral Derivativeassetspledgedascollateral	0	USD
CY2018Q4	ahl	Derivativeassetspledgedascollateral Derivativeassetspledgedascollateral	24000000	USD
CY2017Q4	ahl	Investment Funds InvestmentFunds	2580000000	USD
CY2018Q4	ahl	Investment Funds InvestmentFunds	3559000000	USD
CY2017Q4	ahl	Investment Funds Pledgedas Collateral InvestmentFundsPledgedasCollateral	20000000	USD
CY2018Q4	ahl	Investment Funds Pledgedas Collateral InvestmentFundsPledgedasCollateral	53000000	USD
CY2018	ahl	Maximum Period Interestis Accrued MaximumPeriodInterestisAccrued	P90D
CY2018	ahl	Numberof Classesof Common Stock NumberofClassesofCommonStock	6
CY2018	ahl	Numberof Closed Block Policies NumberofClosedBlockPolicies	2
CY2018	ahl	Numberof Days Interestis Past Duefor Nonaccrual Status NumberofDaysInterestisPastDueforNonaccrualStatus	P90D
CY2017Q4	ahl	Other Investments Pledgedas Collateral OtherInvestmentsPledgedasCollateral	0	USD
CY2018Q4	ahl	Other Investments Pledgedas Collateral OtherInvestmentsPledgedasCollateral	47000000	USD
CY2016	ahl	Premiumsand Annuity Deposits PremiumsandAnnuityDeposits	9258000000	USD
CY2017	ahl	Premiumsand Annuity Deposits PremiumsandAnnuityDeposits	12011000000	USD
CY2018	ahl	Premiumsand Annuity Deposits PremiumsandAnnuityDeposits	40031000000	USD
CY2016	ahl	Reinsurance Agreements Depositson Investment Policiesand Contracts ReinsuranceAgreementsDepositsonInvestmentPoliciesandContracts	3441000000	USD
CY2017	ahl	Reinsurance Agreements Depositson Investment Policiesand Contracts ReinsuranceAgreementsDepositsonInvestmentPoliciesandContracts	663000000	USD
CY2018	ahl	Reinsurance Agreements Depositson Investment Policiesand Contracts ReinsuranceAgreementsDepositsonInvestmentPoliciesandContracts	26532000000	USD
CY2016	ahl	Reinsurance Agreements Withdrawalson Investment Policiesand Contracts ReinsuranceAgreementsWithdrawalsonInvestmentPoliciesandContracts	448000000	USD
CY2017	ahl	Reinsurance Agreements Withdrawalson Investment Policiesand Contracts ReinsuranceAgreementsWithdrawalsonInvestmentPoliciesandContracts	482000000	USD
CY2018	ahl	Reinsurance Agreements Withdrawalson Investment Policiesand Contracts ReinsuranceAgreementsWithdrawalsonInvestmentPoliciesandContracts	1843000000	USD
CY2016	ahl	Shares Excluded From Dilutive Shares Outstanding SharesExcludedFromDilutiveSharesOutstanding	116000000	shares
CY2017	ahl	Shares Excluded From Dilutive Shares Outstanding SharesExcludedFromDilutiveSharesOutstanding	52300000	shares
CY2018	ahl	Shares Excluded From Dilutive Shares Outstanding SharesExcludedFromDilutiveSharesOutstanding	34900000	shares
CY2017Q4	ahl	Short Term Investments Pledgedas Collateral ShortTermInvestmentsPledgedasCollateral	10000000	USD
CY2018Q4	ahl	Short Term Investments Pledgedas Collateral ShortTermInvestmentsPledgedasCollateral	77000000	USD
CY2016	ahl	Supplementary Insurance Information Amortizationof Deferred Policy Acquisition Costsand Valueof Business Acquired SupplementaryInsuranceInformationAmortizationofDeferredPolicyAcquisitionCostsandValueofBusinessAcquired	304000000	USD
CY2017	ahl	Supplementary Insurance Information Amortizationof Deferred Policy Acquisition Costsand Valueof Business Acquired SupplementaryInsuranceInformationAmortizationofDeferredPolicyAcquisitionCostsandValueofBusinessAcquired	344000000	USD
CY2018	ahl	Supplementary Insurance Information Amortizationof Deferred Policy Acquisition Costsand Valueof Business Acquired SupplementaryInsuranceInformationAmortizationofDeferredPolicyAcquisitionCostsandValueofBusinessAcquired	174000000	USD
CY2016Q4	ahl	Supplementary Insurance Information Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits SupplementaryInsuranceInformationDeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfits	2959000000	USD
CY2017Q4	ahl	Supplementary Insurance Information Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits SupplementaryInsuranceInformationDeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfits	2972000000	USD
CY2018Q4	ahl	Supplementary Insurance Information Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits SupplementaryInsuranceInformationDeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfits	5907000000	USD
CY2016	ahl	Unlocking Unlocking	38000000	USD
CY2017	ahl	Unlocking Unlocking	-16000000	USD
CY2018	ahl	Unlocking Unlocking	-82000000	USD
CY2018Q4	ahl	Value Of Guaranteeson Corporate Owned Life Insurance ValueOfGuaranteesonCorporateOwnedLifeInsurance	187000000	USD
CY2018	ahl	Variable Interest Entity Qualitativeor Quantitative Information Electionof Fair Value Option Ownership Percentage VariableInterestEntityQualitativeorQuantitativeInformationElectionofFairValueOptionOwnershipPercentage	0.03
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0001527469
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q2	dei	Entity Public Float EntityPublicFloat	7900000000	USD
CY2018	dei	Entity Registrant Name EntityRegistrantName	Athene Holding Ltd.
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2016Q4	srt	Life Insurance In Force Assumed LifeInsuranceInForceAssumed	9591000000	USD
CY2017Q4	srt	Life Insurance In Force Assumed LifeInsuranceInForceAssumed	8551000000	USD
CY2018Q4	srt	Life Insurance In Force Assumed LifeInsuranceInForceAssumed	7857000000	USD
CY2016Q4	srt	Life Insurance In Force Ceded LifeInsuranceInForceCeded	63894000000	USD
CY2017Q4	srt	Life Insurance In Force Ceded LifeInsuranceInForceCeded	49860000000	USD
CY2018Q4	srt	Life Insurance In Force Ceded LifeInsuranceInForceCeded	45957000000	USD
CY2016Q4	srt	Life Insurance In Force Gross LifeInsuranceInForceGross	56356000000	USD
CY2017Q4	srt	Life Insurance In Force Gross LifeInsuranceInForceGross	43267000000	USD
CY2018Q4	srt	Life Insurance In Force Gross LifeInsuranceInForceGross	39941000000	USD
CY2016Q4	srt	Life Insurance In Force Net LifeInsuranceInForceNet	2053000000	USD
CY2017Q4	srt	Life Insurance In Force Net LifeInsuranceInForceNet	1958000000	USD
CY2018Q4	srt	Life Insurance In Force Net LifeInsuranceInForceNet	1841000000	USD
CY2016Q4	srt	Life Insurance In Force Percentage Assumed To Net LifeInsuranceInForcePercentageAssumedToNet	4.672
CY2017Q4	srt	Life Insurance In Force Percentage Assumed To Net LifeInsuranceInForcePercentageAssumedToNet	4.367
CY2018Q4	srt	Life Insurance In Force Percentage Assumed To Net LifeInsuranceInForcePercentageAssumedToNet	4.268
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	1449000000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-472000000	USD
CY2017Q4	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	0	USD
CY2018Q4	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	0	USD
CY2017Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	3472000000	USD
CY2018Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	3462000000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	153000000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	50000000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	32000000	USD
CY2017Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	573000000	USD
CY2018Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	926000000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	84000000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	45000000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	26000000	USD
CY2017Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	2000000	USD
CY2018Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	2000000	USD
CY2017Q4	us-gaap	Aoci Before Tax Attributable To Parent AociBeforeTaxAttributableToParent	1769000000	USD
CY2018Q4	us-gaap	Aoci Before Tax Attributable To Parent AociBeforeTaxAttributableToParent	-585000000	USD
CY2017Q4	us-gaap	Aoci Tax Attributable To Parent AociTaxAttributableToParent	320000000	USD
CY2018Q4	us-gaap	Aoci Tax Attributable To Parent AociTaxAttributableToParent	-113000000	USD
CY2017Q4	us-gaap	Assets Assets	100161000000	USD
CY2018Q4	us-gaap	Assets Assets	125505000000	USD
CY2016	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	20000000	USD
CY2017	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	21000000	USD
CY2018	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	1001000000	USD
CY2016	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	3393000000	USD
CY2017Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1222000000	USD
CY2017Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1450000000	USD
CY2017Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1206000000	USD
CY2017Q4	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	3385000000	USD
CY2017	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	7263000000	USD
CY2018Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	689000000	USD
CY2018Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1481000000	USD
CY2018	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	5368000000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2516000000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4997000000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	2170000000	USD
CY2018Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1897000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3405000000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	4067000000	USD
CY2018Q4	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1301000000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-320000000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	2481000000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-1592000000	USD
CY2015Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2836000000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2516000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4997000000	USD
CY2016	us-gaap	Cash Divested From Deconsolidation CashDivestedFromDeconsolidation	0	USD
CY2017	us-gaap	Cash Divested From Deconsolidation CashDivestedFromDeconsolidation	0	USD
CY2018	us-gaap	Cash Divested From Deconsolidation CashDivestedFromDeconsolidation	296000000	USD
CY2018Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	362000000	USD
CY2016	us-gaap	Ceded Premiums Earned CededPremiumsEarned	228000000	USD
CY2017	us-gaap	Ceded Premiums Earned CededPremiumsEarned	195000000	USD
CY2018	us-gaap	Ceded Premiums Earned CededPremiumsEarned	405000000	USD
CY2017Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Available For Sale Debt Securities Acquired During Period At Acquisition At Fair Value CertainLoansAcquiredInTransferAccountedForAsAvailableForSaleDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue	1428000000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Available For Sale Debt Securities Acquired During Period At Acquisition At Fair Value CertainLoansAcquiredInTransferAccountedForAsAvailableForSaleDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue	454000000	USD
CY2017Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Available For Sale Debt Securities Acquired During Period Cash Flows Expected To Be Collected At Acquisition CertainLoansAcquiredInTransferAccountedForAsAvailableForSaleDebtSecuritiesAcquiredDuringPeriodCashFlowsExpectedToBeCollectedAtAcquisition	1790000000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Available For Sale Debt Securities Acquired During Period Cash Flows Expected To Be Collected At Acquisition CertainLoansAcquiredInTransferAccountedForAsAvailableForSaleDebtSecuritiesAcquiredDuringPeriodCashFlowsExpectedToBeCollectedAtAcquisition	562000000	USD
CY2017Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Available For Sale Debt Securities Acquired During Period Contractually Required Payments Receivable At Acquisition CertainLoansAcquiredInTransferAccountedForAsAvailableForSaleDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition	2161000000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Available For Sale Debt Securities Acquired During Period Contractually Required Payments Receivable At Acquisition CertainLoansAcquiredInTransferAccountedForAsAvailableForSaleDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition	623000000	USD
CY2017Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Available For Sale Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferAccountedForAsAvailableForSaleDebtSecuritiesCarryingAmountNet	6703000000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Available For Sale Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferAccountedForAsAvailableForSaleDebtSecuritiesCarryingAmountNet	5828000000	USD
CY2017Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Available For Sale Debt Securities Outstanding Balance CertainLoansAcquiredInTransferAccountedForAsAvailableForSaleDebtSecuritiesOutstandingBalance	8026000000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Available For Sale Debt Securities Outstanding Balance CertainLoansAcquiredInTransferAccountedForAsAvailableForSaleDebtSecuritiesOutstandingBalance	6773000000	USD
CY2016Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYield	2080000000	USD
CY2017Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYield	2020000000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYield	1677000000	USD
CY2017	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAccretion	400000000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAccretion	405000000	USD
CY2017	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Additions CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAdditions	264000000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Additions CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAdditions	65000000	USD
CY2017	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	76000000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Reclassifications To Nonaccretable Difference CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToNonaccretableDifference	3000000	USD
CY2016Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	70000000	USD
CY2017Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	273000000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	697000000	USD
CY2017	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	24000000	USD
CY2017Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period At Acquisition At Fair Value CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue	633000000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period At Acquisition At Fair Value CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue	1178000000	USD
CY2018Q4	us-gaap	Credit Risk Derivative Liabilities At Fair Value CreditRiskDerivativeLiabilitiesAtFairValue	4000000	USD
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CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Outstanding Balance CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance	2210000000	USD
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CY2018Q4	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	10000000	USD
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CY2018	us-gaap	Deferred Policy Acquisition Cost Amortization Expense Assumption Change DeferredPolicyAcquisitionCostAmortizationExpenseAssumptionChange	-21000000	USD
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CY2017Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	1375000000	USD
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CY2017	us-gaap	Interest Paid InterestPaid	0	USD
CY2018	us-gaap	Interest Paid InterestPaid	26000000	USD
CY2018Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	230000000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	90985000000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	117229000000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	100161000000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	125505000000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	28000000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	48000000	USD
CY2017Q4	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	914000000	USD
CY2018Q4	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	1830000000	USD
CY2017	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	-1000000	USD
CY2017Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	6233000000	USD
CY2018Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	10631000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1155000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	5048000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	3707000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2661000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-5769000000	USD
CY2018Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2884000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3812000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1199000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3170000000	USD
CY2018Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	573000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	427000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1143000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2874000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	773000000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	377000000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	298000000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	244000000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	439000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	1358000000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	277000000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	257000000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	623000000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	-104000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	1053000000	USD
CY2016	us-gaap	Net Investment Income NetInvestmentIncome	2914000000	USD
CY2017	us-gaap	Net Investment Income NetInvestmentIncome	3269000000	USD
CY2018	us-gaap	Net Investment Income NetInvestmentIncome	4004000000	USD
CY2018	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2018Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	308000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	882000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	1312000000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-891000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-702000000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-1593000000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-140000000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-1733000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-2442000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	867000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	1230000000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-952000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-603000000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-1555000000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-137000000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-1692000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-2310000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-5000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-105000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	146000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-8000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	20000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-11000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	607000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	896000000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-773000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-487000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1260000000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-114000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1374000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1879000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	0	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	1000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-3000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	260000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	334000000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-179000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-116000000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-295000000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-23000000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-318000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-431000000	USD
CY2016	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	2000000	USD
CY2017	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	-4000000	USD
CY2018	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	6000000	USD
CY2016	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	1421000000	USD
CY2017	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	3476000000	USD
CY2018	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	3698000000	USD
CY2016	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	1030000000	USD
CY2017	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	3200000000	USD
CY2018	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	4187000000	USD
CY2016	us-gaap	Premiums Earned Net PremiumsEarnedNet	240000000	USD
CY2017	us-gaap	Premiums Earned Net PremiumsEarnedNet	2465000000	USD
CY2018	us-gaap	Premiums Earned Net PremiumsEarnedNet	3368000000	USD
CY2016	us-gaap	Premiums Percentage Assumed To Net PremiumsPercentageAssumedToNet	0.083
CY2017	us-gaap	Premiums Percentage Assumed To Net PremiumsPercentageAssumedToNet	0.009
CY2018	us-gaap	Premiums Percentage Assumed To Net PremiumsPercentageAssumedToNet	0.297
CY2016	us-gaap	Present Value Of Future Insurance Profits Additions From Acquisitions PresentValueOfFutureInsuranceProfitsAdditionsFromAcquisitions	0	USD
CY2017	us-gaap	Present Value Of Future Insurance Profits Additions From Acquisitions PresentValueOfFutureInsuranceProfitsAdditionsFromAcquisitions	0	USD
CY2018	us-gaap	Present Value Of Future Insurance Profits Additions From Acquisitions PresentValueOfFutureInsuranceProfitsAdditionsFromAcquisitions	0	USD
CY2016	us-gaap	Present Value Of Future Insurance Profits Amortization Expense1 PresentValueOfFutureInsuranceProfitsAmortizationExpense1	156000000	USD
CY2017	us-gaap	Present Value Of Future Insurance Profits Amortization Expense1 PresentValueOfFutureInsuranceProfitsAmortizationExpense1	162000000	USD
CY2018	us-gaap	Present Value Of Future Insurance Profits Amortization Expense1 PresentValueOfFutureInsuranceProfitsAmortizationExpense1	141000000	USD
CY2016	us-gaap	Present Value Of Future Insurance Profits Amortization Expense Assumption Change PresentValueOfFutureInsuranceProfitsAmortizationExpenseAssumptionChange	23000000	USD
CY2017	us-gaap	Present Value Of Future Insurance Profits Amortization Expense Assumption Change PresentValueOfFutureInsuranceProfitsAmortizationExpenseAssumptionChange	1000000	USD
CY2018	us-gaap	Present Value Of Future Insurance Profits Amortization Expense Assumption Change PresentValueOfFutureInsuranceProfitsAmortizationExpenseAssumptionChange	-54000000	USD
CY2018Q4	us-gaap	Present Value Of Future Insurance Profits Amortization Expense Year Five PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearFive	68000000	USD
CY2018Q4	us-gaap	Present Value Of Future Insurance Profits Amortization Expense Year Four PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearFour	68000000	USD
CY2018Q4	us-gaap	Present Value Of Future Insurance Profits Amortization Expense Year One PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearOne	73000000	USD
CY2018Q4	us-gaap	Present Value Of Future Insurance Profits Amortization Expense Year Three PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearThree	72000000	USD
CY2018Q4	us-gaap	Present Value Of Future Insurance Profits Amortization Expense Year Two PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearTwo	77000000	USD
CY2016	us-gaap	Present Value Of Future Insurance Profits Unrealized Gain Loss On Investment PresentValueOfFutureInsuranceProfitsUnrealizedGainLossOnInvestment	99000000	USD
CY2017	us-gaap	Present Value Of Future Insurance Profits Unrealized Gain Loss On Investment PresentValueOfFutureInsuranceProfitsUnrealizedGainLossOnInvestment	112000000	USD

CY2016

ahl

Annuity Deposit Revenue Gross

AnnuityDepositRevenueGross

9018000000

USD

CY2017

ahl

Annuity Deposit Revenue Gross

AnnuityDepositRevenueGross

9546000000

USD

CY2018

ahl

Annuity Deposit Revenue Gross

AnnuityDepositRevenueGross

36663000000

USD

CY2017Q4

ahl

Certain Loans Acquiredin Transfer Accountedforas Availableforsale Debt Securities Amortized Cost

CertainLoansAcquiredinTransferAccountedforasAvailableforsaleDebtSecuritiesAmortizedCost

6168000000

USD

CY2018Q4

ahl

Certain Loans Acquiredin Transfer Accountedforas Availableforsale Debt Securities Amortized Cost

CertainLoansAcquiredinTransferAccountedforasAvailableforsaleDebtSecuritiesAmortizedCost

5518000000

USD

CY2017Q4

ahl

Certain Loans Acquiredin Transfer Accountedforas Availableforsale Debt Securities Cash Flows Expectedtobe Collected

CertainLoansAcquiredinTransferAccountedforasAvailableforsaleDebtSecuritiesCashFlowsExpectedtobeCollected

8188000000

USD

CY2018Q4

ahl

Certain Loans Acquiredin Transfer Accountedforas Availableforsale Debt Securities Cash Flows Expectedtobe Collected

CertainLoansAcquiredinTransferAccountedforasAvailableforsaleDebtSecuritiesCashFlowsExpectedtobeCollected

7195000000

USD

CY2017Q4

ahl

Certain Loans Acquiredin Transfer Accountedforas Availableforsale Debt Securities Contractually Required Payments Receivable

CertainLoansAcquiredinTransferAccountedforasAvailableforsaleDebtSecuritiesContractuallyRequiredPaymentsReceivable

9690000000

USD

CY2018Q4

ahl

Certain Loans Acquiredin Transfer Accountedforas Availableforsale Debt Securities Contractually Required Payments Receivable

CertainLoansAcquiredinTransferAccountedforasAvailableforsaleDebtSecuritiesContractuallyRequiredPaymentsReceivable

8179000000

USD

CY2017Q4

ahl

Certain Loans Acquiredin Transfer Not Accountedforas Debt Securities Cash Flows Expectedtobe Collected

CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesCashFlowsExpectedtobeCollected

1090000000

USD

CY2018Q4

ahl

Certain Loans Acquiredin Transfer Not Accountedforas Debt Securities Cash Flows Expectedtobe Collected

CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesCashFlowsExpectedtobeCollected

2628000000

USD

CY2017Q4

ahl

Certain Loans Acquiredin Transfer Not Accountedforas Debt Securities Contractually Required Payments Receivable

CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesContractuallyRequiredPaymentsReceivable

1140000000

USD

CY2018Q4

ahl

Certain Loans Acquiredin Transfer Not Accountedforas Debt Securities Contractually Required Payments Receivable

CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesContractuallyRequiredPaymentsReceivable

2675000000

USD

CY2017Q4

ahl

Certain Loans Acquiredin Transfer Not Accountedforas Debt Securities Fair Value

CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesFairValue

844000000

USD

CY2018Q4

ahl

Certain Loans Acquiredin Transfer Not Accountedforas Debt Securities Fair Value

CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesFairValue

1933000000

USD

CY2016

ahl

Changein Accumulated Other Comprehensive Income

ChangeinAccumulatedOtherComprehensiveIncome

607000000

USD

CY2017

ahl

Changein Accumulated Other Comprehensive Income

ChangeinAccumulatedOtherComprehensiveIncome

1083000000

USD

CY2018

ahl

Changein Accumulated Other Comprehensive Income

ChangeinAccumulatedOtherComprehensiveIncome

-1921000000

USD

CY2018

ahl

Closed Block Numberof Predecessor Entities Reorganized

ClosedBlockNumberofPredecessorEntitiesReorganized

2

CY2018Q4

ahl

Common Stock Additional Shares Authorized

CommonStockAdditionalSharesAuthorized

150000000

shares

CY2018

ahl

Common Stock Voting Rights Maximum Voting Powerfor Related Party Group

CommonStockVotingRightsMaximumVotingPowerforRelatedPartyGroup

0.03

CY2018

ahl

Common Stock Voting Rights Maximum Voting Powerfor Single Shareholder

CommonStockVotingRightsMaximumVotingPowerforSingleShareholder

0.099

CY2015Q4

ahl

Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits

DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfits

2656000000

USD

CY2016Q4

ahl

Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits

DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfits

2959000000

USD

CY2017Q4

ahl

Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits

DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfits

2972000000

USD

CY2018Q4

ahl

Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits

DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfits

5907000000

USD

CY2016

ahl

Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Additions

DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsAdditions

801000000

USD

CY2017

ahl

Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Additions

DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsAdditions

654000000

USD

CY2018

ahl

Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Additions

DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsAdditions

2745000000

USD

CY2016

ahl

Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Amortization Expense Excluding Unlocking

DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsAmortizationExpenseExcludingUnlocking

305000000

USD

CY2017

ahl

Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Amortization Expense Excluding Unlocking

DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsAmortizationExpenseExcludingUnlocking

423000000

USD

CY2018

ahl

Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Amortization Expense Excluding Unlocking

DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsAmortizationExpenseExcludingUnlocking

310000000

USD

CY2016

ahl

Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Unrealized Investment Gains Losses

DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsUnrealizedInvestmentGainsLosses

155000000

USD

CY2017

ahl

Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Unrealized Investment Gains Losses

DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsUnrealizedInvestmentGainsLosses

234000000

USD

CY2018

ahl

Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits Unrealized Investment Gains Losses

DeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfitsUnrealizedInvestmentGainsLosses

-418000000

USD

CY2017Q4

ahl

Deferred Tax Liabilities Unrealized Gainson Availableforsale Securities

DeferredTaxLiabilitiesUnrealizedGainsonAvailableforsaleSecurities

325000000

USD

CY2018Q4

ahl

Deferred Tax Liabilities Unrealized Gainson Availableforsale Securities

DeferredTaxLiabilitiesUnrealizedGainsonAvailableforsaleSecurities

0

USD

CY2017Q4

ahl

Derivative Asset Fair Value Offset Against Collateral Netof Not Subjectto Master Netting Arrangement Policy Election Excluding Obligationto Return Securities

DerivativeAssetFairValueOffsetAgainstCollateralNetofNotSubjecttoMasterNettingArrangementPolicyElectionExcludingObligationtoReturnSecurities

169000000

USD

CY2018Q4

ahl

Derivative Asset Fair Value Offset Against Collateral Netof Not Subjectto Master Netting Arrangement Policy Election Excluding Obligationto Return Securities

DerivativeAssetFairValueOffsetAgainstCollateralNetofNotSubjecttoMasterNettingArrangementPolicyElectionExcludingObligationtoReturnSecurities

22000000

USD

CY2017Q4

ahl

Derivative Asset Including Embedded Derivatives

DerivativeAssetIncludingEmbeddedDerivatives

2863000000

USD

CY2018Q4

ahl

Derivative Asset Including Embedded Derivatives

DerivativeAssetIncludingEmbeddedDerivatives

990000000

USD

CY2017Q4

ahl

Derivative Liabilities Including Embedded Derivatives

DerivativeLiabilitiesIncludingEmbeddedDerivatives

7567000000

USD

CY2018Q4

ahl

Derivative Liabilities Including Embedded Derivatives

DerivativeLiabilitiesIncludingEmbeddedDerivatives

8053000000

USD

CY2017Q4

ahl

Derivative Liability Fair Value Offset Against Collateral Netof Not Subjectto Master Netting Arrangement Policy Election Excluding Rightto Reclaim Securities

DerivativeLiabilityFairValueOffsetAgainstCollateralNetofNotSubjecttoMasterNettingArrangementPolicyElectionExcludingRighttoReclaimSecurities

12000000

USD

CY2018Q4

ahl

Derivative Liability Fair Value Offset Against Collateral Netof Not Subjectto Master Netting Arrangement Policy Election Excluding Rightto Reclaim Securities

DerivativeLiabilityFairValueOffsetAgainstCollateralNetofNotSubjecttoMasterNettingArrangementPolicyElectionExcludingRighttoReclaimSecurities

9000000

USD

CY2017Q4

ahl

Derivativeassetspledgedascollateral

0

USD

CY2018Q4

ahl

Derivativeassetspledgedascollateral

24000000

USD

CY2017Q4

ahl

Investment Funds

InvestmentFunds

2580000000

USD

CY2018Q4

ahl

Investment Funds

InvestmentFunds

3559000000

USD

CY2017Q4

ahl

Investment Funds Pledgedas Collateral

InvestmentFundsPledgedasCollateral

20000000

USD

CY2018Q4

ahl

Investment Funds Pledgedas Collateral

InvestmentFundsPledgedasCollateral

53000000

USD

CY2018

ahl

Maximum Period Interestis Accrued

MaximumPeriodInterestisAccrued

P90D

CY2018

ahl

Numberof Classesof Common Stock

NumberofClassesofCommonStock

6

CY2018

ahl

Numberof Closed Block Policies

NumberofClosedBlockPolicies

2

CY2018

ahl

Numberof Days Interestis Past Duefor Nonaccrual Status

NumberofDaysInterestisPastDueforNonaccrualStatus

P90D

CY2017Q4

ahl

Other Investments Pledgedas Collateral

OtherInvestmentsPledgedasCollateral

0

USD

CY2018Q4

ahl

Other Investments Pledgedas Collateral

OtherInvestmentsPledgedasCollateral

47000000

USD

CY2016

ahl

Premiumsand Annuity Deposits

PremiumsandAnnuityDeposits

9258000000

USD

CY2017

ahl

Premiumsand Annuity Deposits

PremiumsandAnnuityDeposits

12011000000

USD

CY2018

ahl

Premiumsand Annuity Deposits

PremiumsandAnnuityDeposits

40031000000

USD

CY2016

ahl

Reinsurance Agreements Depositson Investment Policiesand Contracts

ReinsuranceAgreementsDepositsonInvestmentPoliciesandContracts

3441000000

USD

CY2017

ahl

Reinsurance Agreements Depositson Investment Policiesand Contracts

ReinsuranceAgreementsDepositsonInvestmentPoliciesandContracts

663000000

USD

CY2018

ahl

Reinsurance Agreements Depositson Investment Policiesand Contracts

ReinsuranceAgreementsDepositsonInvestmentPoliciesandContracts

26532000000

USD

CY2016

ahl

Reinsurance Agreements Withdrawalson Investment Policiesand Contracts

ReinsuranceAgreementsWithdrawalsonInvestmentPoliciesandContracts

448000000

USD

CY2017

ahl

Reinsurance Agreements Withdrawalson Investment Policiesand Contracts

ReinsuranceAgreementsWithdrawalsonInvestmentPoliciesandContracts

482000000

USD

CY2018

ahl

Reinsurance Agreements Withdrawalson Investment Policiesand Contracts

ReinsuranceAgreementsWithdrawalsonInvestmentPoliciesandContracts

1843000000

USD

CY2016

ahl

Shares Excluded From Dilutive Shares Outstanding

SharesExcludedFromDilutiveSharesOutstanding

116000000

shares

CY2017

ahl

Shares Excluded From Dilutive Shares Outstanding

SharesExcludedFromDilutiveSharesOutstanding

52300000

shares

CY2018

ahl

Shares Excluded From Dilutive Shares Outstanding

SharesExcludedFromDilutiveSharesOutstanding

34900000

shares

CY2017Q4

ahl

Short Term Investments Pledgedas Collateral

ShortTermInvestmentsPledgedasCollateral

10000000

USD

CY2018Q4

ahl

Short Term Investments Pledgedas Collateral

ShortTermInvestmentsPledgedasCollateral

77000000

USD

CY2016

ahl

Supplementary Insurance Information Amortizationof Deferred Policy Acquisition Costsand Valueof Business Acquired

SupplementaryInsuranceInformationAmortizationofDeferredPolicyAcquisitionCostsandValueofBusinessAcquired

304000000

USD

CY2017

ahl

Supplementary Insurance Information Amortizationof Deferred Policy Acquisition Costsand Valueof Business Acquired

SupplementaryInsuranceInformationAmortizationofDeferredPolicyAcquisitionCostsandValueofBusinessAcquired

344000000

USD

CY2018

ahl

Supplementary Insurance Information Amortizationof Deferred Policy Acquisition Costsand Valueof Business Acquired

SupplementaryInsuranceInformationAmortizationofDeferredPolicyAcquisitionCostsandValueofBusinessAcquired

174000000

USD

CY2016Q4

ahl

Supplementary Insurance Information Deferred Policy Acquisition Costs Deferred Sales Inducementsand Present Valueof Future Profits

SupplementaryInsuranceInformationDeferredPolicyAcquisitionCostsDeferredSalesInducementsandPresentValueofFutureProfits

2959000000

USD

CY2017Q4

ahl

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Deferred Sales Inducement Cost Amortization Expense Assumption Change

DeferredSalesInducementCostAmortizationExpenseAssumptionChange

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CY2018

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Deferred Sales Inducement Cost Amortization Expense Assumption Change

DeferredSalesInducementCostAmortizationExpenseAssumptionChange

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CY2016

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Deferred Sales Inducement Cost Unrealized Gain Loss On Investment

DeferredSalesInducementCostUnrealizedGainLossOnInvestment

19000000

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CY2017

us-gaap

Deferred Sales Inducement Cost Unrealized Gain Loss On Investment

DeferredSalesInducementCostUnrealizedGainLossOnInvestment

40000000

USD

CY2018

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Deferred Sales Inducement Cost Unrealized Gain Loss On Investment

DeferredSalesInducementCostUnrealizedGainLossOnInvestment

-69000000

USD

CY2016

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Deferred Sales Inducements Additions

DeferredSalesInducementsAdditions

200000000

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CY2017

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Deferred Sales Inducements Additions

DeferredSalesInducementsAdditions

161000000

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CY2018

us-gaap

Deferred Sales Inducements Additions

DeferredSalesInducementsAdditions

264000000

USD

CY2016

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Deferred Sales Inducements Amortization Expense

DeferredSalesInducementsAmortizationExpense

36000000

USD

CY2017

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Deferred Sales Inducements Amortization Expense

DeferredSalesInducementsAmortizationExpense

67000000

USD

CY2018

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Deferred Sales Inducements Amortization Expense

DeferredSalesInducementsAmortizationExpense

61000000

USD

CY2015Q4

us-gaap

Deferred Sales Inducements Net

DeferredSalesInducementsNet

320000000

USD

CY2016Q4

us-gaap

Deferred Sales Inducements Net

DeferredSalesInducementsNet

462000000

USD

CY2017Q4

us-gaap

Deferred Sales Inducements Net

DeferredSalesInducementsNet

520000000

USD

CY2018Q4

us-gaap

Deferred Sales Inducements Net

DeferredSalesInducementsNet

799000000

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CY2017Q4

us-gaap

Deferred Tax Assets Gross

DeferredTaxAssetsGross

1664000000

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CY2018Q4

us-gaap

Deferred Tax Assets Gross

DeferredTaxAssetsGross

1481000000

USD

CY2018Q4

us-gaap

Deferred Tax Assets Liabilities Net

DeferredTaxAssetsLiabilitiesNet

340000000

USD

CY2017Q4

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Deferred Tax Assets Net

DeferredTaxAssetsNet

1568000000

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CY2018Q4

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Deferred Tax Assets Net

DeferredTaxAssetsNet

1429000000

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CY2017Q4

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Deferred Tax Assets Operating Loss Carryforwards

DeferredTaxAssetsOperatingLossCarryforwards

167000000

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CY2018Q4

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Deferred Tax Assets Operating Loss Carryforwards

DeferredTaxAssetsOperatingLossCarryforwards

78000000

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CY2017Q4

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Deferred Tax Assets Other

DeferredTaxAssetsOther

26000000

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CY2018Q4

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Deferred Tax Assets Other

DeferredTaxAssetsOther

38000000

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CY2017Q4

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Deferred Tax Assets Property Plant And Equipment

DeferredTaxAssetsPropertyPlantAndEquipment

26000000

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CY2018Q4

us-gaap

Deferred Tax Assets Property Plant And Equipment

DeferredTaxAssetsPropertyPlantAndEquipment

43000000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Tax Credit Carryforwards

DeferredTaxAssetsTaxCreditCarryforwards

6000000

USD

CY2018Q4

us-gaap

Deferred Tax Assets Tax Credit Carryforwards

DeferredTaxAssetsTaxCreditCarryforwards

0

USD

CY2017Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits

DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits

37000000

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CY2018Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits

DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits

24000000

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CY2017Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Policyholder Liabilities

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsPolicyholderLiabilities

1402000000

USD

CY2018Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Policyholder Liabilities

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsPolicyholderLiabilities

1186000000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross

DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross

0

USD

CY2018Q4

us-gaap

Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross

DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross

112000000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Valuation Allowance

DeferredTaxAssetsValuationAllowance

96000000

USD

CY2018Q4

us-gaap

Deferred Tax Assets Valuation Allowance

DeferredTaxAssetsValuationAllowance

52000000

USD

CY2017Q4

us-gaap

Deferred Tax Liabilities

DeferredTaxLiabilities

43000000

USD

CY2017Q4

us-gaap

Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost

DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost

497000000

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CY2018Q4

us-gaap

Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost

DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost

790000000

USD

CY2017Q4

us-gaap

Deferred Tax Liabilities Investments

DeferredTaxLiabilitiesInvestments

781000000

USD

CY2018Q4

us-gaap

Deferred Tax Liabilities Investments

DeferredTaxLiabilitiesInvestments

296000000

USD

CY2017Q4

us-gaap

Deferred Tax Liabilities Other

DeferredTaxLiabilitiesOther

8000000

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CY2018Q4

us-gaap

Deferred Tax Liabilities Other

DeferredTaxLiabilitiesOther

3000000

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CY2017Q4

us-gaap

Derivative Asset Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election

DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection

-52000000

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CY2018Q4

us-gaap

Derivative Asset Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election

DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection

18000000

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CY2017Q4

us-gaap

Derivative Asset Not Offset Policy Election Deduction

DerivativeAssetNotOffsetPolicyElectionDeduction

59000000

USD

CY2018Q4

us-gaap

Derivative Asset Not Offset Policy Election Deduction

DerivativeAssetNotOffsetPolicyElectionDeduction

52000000

USD

CY2017Q4

us-gaap

Derivative Collateral Obligation To Return Cash

DerivativeCollateralObligationToReturnCash

2323000000

USD

CY2018Q4

us-gaap

Derivative Collateral Obligation To Return Cash

DerivativeCollateralObligationToReturnCash

969000000

USD

CY2017Q4

us-gaap

Derivative Collateral Obligation To Return Securities

DerivativeCollateralObligationToReturnSecurities

221000000

USD

CY2018Q4

us-gaap

Derivative Collateral Obligation To Return Securities

DerivativeCollateralObligationToReturnSecurities

4000000

USD

CY2017Q4

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

63000000

USD

CY2018Q4

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Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

24000000

USD

CY2017Q4

us-gaap

Derivative Collateral Right To Reclaim Securities

DerivativeCollateralRightToReclaimSecurities

0

USD

CY2018Q4

us-gaap

Derivative Collateral Right To Reclaim Securities

DerivativeCollateralRightToReclaimSecurities

0

USD

CY2017Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

2551000000

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CY2018Q4

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Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

1043000000

USD

CY2017Q4

us-gaap

Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral

134000000

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CY2018Q4

us-gaap

Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral

85000000

USD

CY2016

us-gaap

Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net

DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

288000000

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CY2017

us-gaap

Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net

DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

633000000

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CY2018

us-gaap

Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net

DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

-176000000

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CY2017Q4

us-gaap

Derivative Liability Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election

DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection

12000000

USD

CY2018Q4

us-gaap

Derivative Liability Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election

DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection

9000000

USD

CY2017Q4

us-gaap

Derivative Liability Not Offset Policy Election Deduction

DerivativeLiabilityNotOffsetPolicyElectionDeduction

59000000

USD

CY2018Q4

us-gaap

Derivative Liability Not Offset Policy Election Deduction

DerivativeLiabilityNotOffsetPolicyElectionDeduction

52000000

USD

CY2016

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

448000000

USD

CY2017

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

2639000000

USD

CY2018

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

2772000000

USD

CY2016

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents

EffectOfExchangeRateOnCashAndCashEquivalents

-13000000

USD

CY2017

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents

EffectOfExchangeRateOnCashAndCashEquivalents

32000000

USD

CY2018

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents

EffectOfExchangeRateOnCashAndCashEquivalents

0

USD

CY2016

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

-0.09

CY2017

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.07

CY2018

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.10

CY2017Q4

us-gaap

Equity Method Investment Summarized Financial Information Assets

EquityMethodInvestmentSummarizedFinancialInformationAssets

22777000000

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CY2018Q4

us-gaap

Equity Method Investment Summarized Financial Information Assets

EquityMethodInvestmentSummarizedFinancialInformationAssets

40630000000

USD

CY2017Q4

us-gaap

Equity Method Investment Summarized Financial Information Equity

EquityMethodInvestmentSummarizedFinancialInformationEquity

15259000000

USD

CY2016

us-gaap

Income Tax Expense Benefit Intraperiod Tax Allocation

IncomeTaxExpenseBenefitIntraperiodTaxAllocation

199000000

USD

CY2017

us-gaap

Income Tax Expense Benefit Intraperiod Tax Allocation

IncomeTaxExpenseBenefitIntraperiodTaxAllocation

440000000

USD

CY2016

us-gaap

Equity Method Investment Summarized Financial Information Net Income Loss

EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss

1415000000

USD

CY2017

us-gaap

Equity Method Investment Summarized Financial Information Net Income Loss

EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss

1587000000

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CY2018Q4

us-gaap

Equity Method Investment Summarized Financial Information Equity

EquityMethodInvestmentSummarizedFinancialInformationEquity

16389000000

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CY2017Q4

us-gaap

Equity Method Investment Summarized Financial Information Liabilities

EquityMethodInvestmentSummarizedFinancialInformationLiabilities

7518000000

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CY2018Q4

us-gaap

Equity Method Investment Summarized Financial Information Liabilities

EquityMethodInvestmentSummarizedFinancialInformationLiabilities

24241000000

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CY2016

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

-61000000

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CY2017

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

106000000

USD

CY2018Q1

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

45000000

USD

CY2018Q2

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

64000000

USD

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

109000000

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CY2018Q3

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

56000000

USD

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

165000000

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CY2018

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

122000000

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CY2018

us-gaap

Equity Method Investment Summarized Financial Information Net Income Loss

EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss

1159000000

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CY2017Q4

us-gaap

Equity Securities Fv Ni Restricted

EquitySecuritiesFvNiRestricted

36000000

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CY2018Q4

us-gaap

Equity Securities Fv Ni Restricted

EquitySecuritiesFvNiRestricted

2000000

USD

CY2016

us-gaap

Fair Value Option Changes In Fair Value Gain Loss1

FairValueOptionChangesInFairValueGainLoss1

-22000000

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CY2017

us-gaap

Fair Value Option Changes In Fair Value Gain Loss1

FairValueOptionChangesInFairValueGainLoss1

45000000

USD

CY2018

us-gaap

Fair Value Option Changes In Fair Value Gain Loss1

FairValueOptionChangesInFairValueGainLoss1

-36000000

USD

CY2016

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

712000000

USD

CY2017

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

1464000000

USD

CY2018Q1

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

322000000

USD

CY2018Q2

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

321000000

USD

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

643000000

USD

CY2018Q3

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

679000000

USD

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

1322000000

USD

CY2018

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

1175000000

USD

CY2018

us-gaap

Income Tax Expense Benefit Intraperiod Tax Allocation

IncomeTaxExpenseBenefitIntraperiodTaxAllocation

-309000000

USD

CY2017Q4

us-gaap

Income Tax Receivable

IncomeTaxReceivable

20000000

USD

CY2018Q4

us-gaap

Income Tax Receivable

IncomeTaxReceivable

3000000

USD

CY2016

us-gaap

Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance

IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance

-116000000

USD

CY2017

us-gaap

Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance

IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance

-5000000

USD

CY2018

us-gaap

Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance

IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance

0

USD

CY2016

us-gaap

Income Tax Reconciliation Change In Enacted Tax Rate

IncomeTaxReconciliationChangeInEnactedTaxRate

0

USD

CY2017

us-gaap

Income Tax Reconciliation Change In Enacted Tax Rate

IncomeTaxReconciliationChangeInEnactedTaxRate

-7000000

USD

CY2018

us-gaap

Income Tax Reconciliation Change In Enacted Tax Rate

IncomeTaxReconciliationChangeInEnactedTaxRate

0

USD

CY2016

us-gaap

Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate

IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

51000000

USD

CY2017

us-gaap

Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate

IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

104000000

USD

CY2018

us-gaap

Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate

IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

112000000

USD

CY2016

us-gaap

Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost

IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost

5000000

USD

CY2017

us-gaap

Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost

IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost

5000000

USD

CY2018

us-gaap

Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost

IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost

1000000

USD

CY2016

us-gaap

Income Tax Reconciliation Prior Year Income Taxes

IncomeTaxReconciliationPriorYearIncomeTaxes

1000000

USD

CY2017

us-gaap

Income Tax Reconciliation Prior Year Income Taxes

IncomeTaxReconciliationPriorYearIncomeTaxes

8000000

USD

CY2018

us-gaap

Income Tax Reconciliation Prior Year Income Taxes

IncomeTaxReconciliationPriorYearIncomeTaxes

11000000

USD

CY2016

us-gaap

Income Tax Reconciliation State And Local Income Taxes

IncomeTaxReconciliationStateAndLocalIncomeTaxes

5000000

USD

CY2017

us-gaap

Income Tax Reconciliation State And Local Income Taxes

IncomeTaxReconciliationStateAndLocalIncomeTaxes

9000000

USD

CY2018

us-gaap

Income Tax Reconciliation State And Local Income Taxes

IncomeTaxReconciliationStateAndLocalIncomeTaxes

1000000

USD

CY2016

us-gaap

Income Tax Reconciliation Tax Exempt Income

IncomeTaxReconciliationTaxExemptIncome

7000000

USD

CY2017

us-gaap

Income Tax Reconciliation Tax Exempt Income

IncomeTaxReconciliationTaxExemptIncome

8000000

USD

CY2018

us-gaap

Income Tax Reconciliation Tax Exempt Income

IncomeTaxReconciliationTaxExemptIncome

3000000

USD

CY2016

us-gaap

Income Taxes Paid Net

IncomeTaxesPaidNet

-31000000

USD

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-6054000000

USD

CY2018

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-8173000000

USD

CY2017

us-gaap

Income Taxes Paid Net

IncomeTaxesPaidNet

-64000000

USD

CY2018

us-gaap

Income Taxes Paid Net

IncomeTaxesPaidNet

52000000

USD

CY2018

us-gaap

Interest Expense Long Term Debt

InterestExpenseLongTermDebt

41000000

USD

CY2016

us-gaap

Interest Paid

InterestPaid

9000000

USD

CY2017

us-gaap

Interest Paid

InterestPaid

0

USD

CY2018

us-gaap

Interest Paid

InterestPaid

26000000

USD

CY2018Q4

us-gaap

Letters Of Credit Outstanding Amount

LettersOfCreditOutstandingAmount

230000000

USD

CY2017Q4

us-gaap

Liabilities

90985000000

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CY2018Q4

us-gaap

Liabilities

117229000000

USD

CY2017Q4

us-gaap

Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

100161000000

USD

CY2018Q4

us-gaap

Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

125505000000

USD

CY2017Q4

us-gaap

Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest

LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest

28000000

USD

CY2018Q4

us-gaap

Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest

LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest

48000000

USD

CY2017Q4

us-gaap

Loans Pledged As Collateral

LoansPledgedAsCollateral

914000000

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CY2018Q4

us-gaap

Loans Pledged As Collateral

LoansPledgedAsCollateral

1830000000

USD

CY2017

us-gaap

Minority Interest Period Increase Decrease

MinorityInterestPeriodIncreaseDecrease

-1000000

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CY2017Q4

us-gaap

Mortgage Loans On Real Estate Commercial And Consumer Net

MortgageLoansOnRealEstateCommercialAndConsumerNet

6233000000

USD

CY2018Q4

us-gaap

Mortgage Loans On Real Estate Commercial And Consumer Net

MortgageLoansOnRealEstateCommercialAndConsumerNet

10631000000

USD

CY2016

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

1155000000

USD

CY2017

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

5048000000

USD

CY2018

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

3707000000

USD

CY2016

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-2661000000

USD

CY2017

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-5769000000

USD

CY2018Q1

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-2884000000

USD

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-3812000000

USD

CY2016

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

1199000000

USD

CY2017

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

3170000000

USD

CY2018Q1

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

573000000

USD

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

427000000

USD

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

1143000000

USD

CY2018

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

2874000000

USD

CY2016

us-gaap

Net Income Loss

NetIncomeLoss

773000000

USD

CY2017Q1

us-gaap

Net Income Loss

NetIncomeLoss

377000000

USD

CY2017Q2

us-gaap

Net Income Loss

NetIncomeLoss

298000000

USD

CY2017Q3

us-gaap

Net Income Loss

NetIncomeLoss

244000000

USD

CY2017Q4

us-gaap

Net Income Loss

NetIncomeLoss

439000000

USD

CY2017

us-gaap

Net Income Loss

NetIncomeLoss

1358000000

USD

CY2018Q1

us-gaap

Net Income Loss

NetIncomeLoss

277000000

USD

CY2018Q2

us-gaap

Net Income Loss

NetIncomeLoss

257000000

USD

CY2018Q3

us-gaap

Net Income Loss

NetIncomeLoss

623000000

USD

CY2018Q4

us-gaap

Net Income Loss

NetIncomeLoss

-104000000

USD

CY2018

us-gaap

Net Income Loss

NetIncomeLoss

1053000000

USD

CY2016

us-gaap

Net Investment Income

NetInvestmentIncome

2914000000

USD

CY2017

us-gaap

Net Investment Income

NetInvestmentIncome

3269000000

USD

CY2018

us-gaap

Net Investment Income

NetInvestmentIncome

4004000000

USD

CY2018

us-gaap

Number Of Reportable Segments

NumberOfReportableSegments

1

segment

CY2018Q4

us-gaap

Operating Loss Carryforwards

OperatingLossCarryforwards

308000000

USD

CY2016

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax

882000000

USD

CY2017

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax

1312000000

USD

CY2018Q1

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax

-891000000

USD

CY2018Q2

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax

-702000000

USD

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax

-1593000000

USD

CY2018Q3

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax

-140000000

USD

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax

-1733000000

USD

CY2018

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax

-2442000000

USD

CY2016

us-gaap

Other Comprehensive Income Loss Before Tax