v3.26.1
Derivatives and Hedging (Financial Statement Classification and Impact of Derivatives Used in Qualifying and Non-qualifying Hedge Relationships) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]        
Non-derivative Net Investment Hedges income (loss) before taxes $ 23 $ (37) $ 37 $ (88)
PRISMIC Embedded Derivative, Gain (Loss) on Derivative, Net (84) 11 4 (136)
Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (386) (2,329) 375 (2,535)
Derivatives Not Qualifying as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (5) 12 (11) (2)
Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (1,045) (863) (852) (520)
Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (1,045) (863) (852) (520)
Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 81 91 158 189
Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Income Statement Location [Axis]: us-gaap:OtherIncome        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 4 (349) 58 (497)
Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 (5) 0 (6)
Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (9) (3) (19) (8)
Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (962) (1,358) (403) (1,572)
Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (941) (1,343) (404) (1,578)
Fair Value Hedging | Derivatives Designated as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Fair Value Hedging | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Fair Value Hedging | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (17) 7 (25) 41
Fair Value Hedging | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Fair Value Hedging | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 (1) 0
Fair Value Hedging | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Fair Value Hedging | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 107 (36) 190
Fair Value Hedging | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 4 (3) 6 (6)
Fair Value Hedged Item | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0 0 0
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument 3 (34) (13) (103)
Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0 0 0
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument 0 0 0 0
Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 12 5 14 (43)
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument (5) 12 (11) (2)
Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0 0 0
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument 0 0 0 0
Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 7 2 14 7
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument 7 2 13 7
Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:OtherIncome        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0 0 0
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument 0 0 0 0
Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge (5) (107) 25 (191)
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument (9) (3) (19) (8)
Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge (3) 2 (6) 4
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument 1 (1) 0 (2)
Gain(loss)excludedfromassessmentofeffectiveness | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 3 (34) (13) (103)
Gain(loss)excludedfromassessmentofeffectiveness | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Gain(loss)excludedfromassessmentofeffectiveness | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Gain(loss)excludedfromassessmentofeffectiveness | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Gain(loss)excludedfromassessmentofeffectiveness | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Gain(loss)excludedfromassessmentofeffectiveness | Income Statement Location [Axis]: us-gaap:OtherIncome        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Gain(loss)excludedfromassessmentofeffectiveness | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (4) (3) (8) (7)
Gain(loss)excludedfromassessmentofeffectiveness | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Cash Flow Hedging | Derivatives Designated as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (395) (2,256) 372 (2,377)
Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 74 89 145 182
Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 4 (344) 58 (491)
Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (22) (14) 1 8
Net Investment Hedging | Derivatives Designated as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 6 (39) 16 (55)
Net Investment Hedging | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Net Investment Hedging | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Net Investment Hedging | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Net Investment Hedging | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Net Investment Hedging | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Net Investment Hedging | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Net Investment Hedging | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Derivatives Not Qualifying as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (221) (271) (298) (130)
Interest Rate | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 172 (215) 187 (26)
Interest Rate | Fair Value Hedging | Derivatives Designated as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Fair Value Hedging | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Fair Value Hedging | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (17) 7 (25) 41
Interest Rate | Fair Value Hedging | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Fair Value Hedging | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 (1) 0
Interest Rate | Fair Value Hedging | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Fair Value Hedging | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (11) (2) (12) 28
Interest Rate | Fair Value Hedging | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 4 (3) 6 (6)
Interest Rate | Fair Value Hedged Item | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0 0 0
Interest Rate | Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0 0 0
Interest Rate | Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 12 5 14 (43)
Interest Rate | Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0 0 0
Interest Rate | Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 7 2 14 7
Interest Rate | Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:OtherIncome        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0 0 0
Interest Rate | Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 7 3 1 (29)
Interest Rate | Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge (3) 2 (6) 4
Interest Rate | Cash Flow Hedging | Derivatives Designated as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 2 1 10
Interest Rate | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (2) (4) (4) (7)
Interest Rate | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Interest Rate | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Derivatives Not Qualifying as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 (1)
Currency | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (57) (413) (57) (587)
Currency | Fair Value Hedging | Derivatives Designated as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Fair Value Hedging | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Fair Value Hedging | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Fair Value Hedging | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Fair Value Hedging | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Fair Value Hedging | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Fair Value Hedging | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 11 109 (24) 162
Currency | Fair Value Hedging | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Fair Value Hedged Item | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0 0 0
Currency | Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0 0 0
Currency | Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0 0 0
Currency | Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0 0 0
Currency | Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0 0 0
Currency | Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:OtherIncome        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0 0 0
Currency | Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge (12) (110) 24 (162)
Currency | Fair Value Hedged Item | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0 0 0
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 3 (34) (13) (103)
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Income Statement Location [Axis]: us-gaap:OtherIncome        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (4) (3) (8) (7)
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Cash Flow Hedging | Derivatives Designated as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (34) (116) 30 (142)
Currency | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Net Investment Hedging | Derivatives Designated as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 6 (39) 16 (55)
Currency | Net Investment Hedging | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Net Investment Hedging | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Net Investment Hedging | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Net Investment Hedging | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Net Investment Hedging | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Net Investment Hedging | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency | Net Investment Hedging | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Derivatives Not Qualifying as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 (5) 0 (5)
Currency/Interest Rate | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (78) (343) 31 (370)
Currency/Interest Rate | Cash Flow Hedging | Derivatives Designated as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (361) (2,142) 341 (2,245)
Currency/Interest Rate | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 76 93 149 189
Currency/Interest Rate | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 4 (344) 58 (491)
Currency/Interest Rate | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Cash Flow Hedging | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (22) (14) 1 8
Currency/Interest Rate | Net Investment Hedging | Derivatives Designated as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Net Investment Hedging | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Net Investment Hedging | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Net Investment Hedging | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Net Investment Hedging | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Net Investment Hedging | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Net Investment Hedging | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Currency/Interest Rate | Net Investment Hedging | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Designated as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Credit Risk Contract | Derivatives Not Qualifying as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Credit Risk Contract | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Credit Risk Contract | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Credit Risk Contract | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Credit Risk Contract | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Credit Risk Contract | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Credit Risk Contract | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Credit Risk Contract | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 59 52 30 41
Equity | Derivatives Not Qualifying as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Equity | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Equity | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Equity | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net (824) (592) (554) (390)
Equity | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Equity | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Equity | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Equity | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 4,270 2,484 2,883 1,015
Embedded Derivative Financial Instruments | Derivatives Not Qualifying as Hedge Accounting Instruments: | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Embedded Derivative Financial Instruments | Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Embedded Derivative Financial Instruments | Income Statement Location [Axis]: us-gaap:InterestCreditedToPolicyholdersAccountBalances | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Embedded Derivative Financial Instruments | Income Statement Location [Axis]: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Embedded Derivative Financial Instruments | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Embedded Derivative Financial Instruments | Income Statement Location [Axis]: us-gaap:OtherIncome | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Embedded Derivative Financial Instruments | Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0 0 0
Embedded Derivative Financial Instruments | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses | Derivatives Not Qualifying as Hedge Accounting Instruments:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Gain (Loss) Recognized In Income Net $ (5,307) $ (2,908) $ (3,478) $ (1,651)