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
Mar. 31, 2026
Mar. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]    
Non-derivative Net Investment Hedges income (loss) before taxes $ 14 $ (51)
PRISMIC Embedded Derivative, Gain (Loss) on Derivative, Net 88 (147)
Gain (Loss) on Investments    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 559 (214)
Gain (Loss) on Investments | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 537 (236)
Market Risk Benefit, Increase (Decrease) from Equity Market Change)    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 194 343
Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 194 343
Investment Income    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 78 98
Investment Income | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Other Income    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 54 (148)
Other Income | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 (1)
Interest Expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Expense | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Credited To Policyholder Account Balances    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net (5) (14)
Interest Credited To Policyholder Account Balances | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Policyholder Benefits    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net (10) (5)
Policyholder Benefits | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Change in AOCI    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 761 (205)
Change in AOCI | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Fair Value Hedging | Gain (Loss) on Investments | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 2 (3)
Fair Value Hedging | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Fair Value Hedging | Investment Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Fair Value Hedging | Other Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Fair Value Hedging | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Fair Value Hedging | Interest Credited To Policyholder Account Balances | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net (8) 35
Fair Value Hedging | Policyholder Benefits | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net (36) 83
Fair Value Hedging | Change in AOCI | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Fair Value Hedged Item | Gain (Loss) on Investments    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge (3) 3
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument (1) 0
Fair Value Hedged Item | Market Risk Benefit, Increase (Decrease) from Equity Market Change)    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument 0 0
Fair Value Hedged Item | Investment Income    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 7 5
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument 7 5
Fair Value Hedged Item | Other Income    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument 0 0
Fair Value Hedged Item | Interest Expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument 0 0
Fair Value Hedged Item | Interest Credited To Policyholder Account Balances    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 3 (49)
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument (5) (14)
Fair Value Hedged Item | Policyholder Benefits    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 30 (85)
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument (10) (5)
Fair Value Hedged Item | Change in AOCI    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument (16) (69)
Gain(loss)excludedfromassessmentofeffectiveness | Gain (Loss) on Investments    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Gain(loss)excludedfromassessmentofeffectiveness | Market Risk Benefit, Increase (Decrease) from Equity Market Change)    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Gain(loss)excludedfromassessmentofeffectiveness | Investment Income    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Gain(loss)excludedfromassessmentofeffectiveness | Other Income    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Gain(loss)excludedfromassessmentofeffectiveness | Interest Expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Gain(loss)excludedfromassessmentofeffectiveness | Interest Credited To Policyholder Account Balances    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Gain(loss)excludedfromassessmentofeffectiveness | Policyholder Benefits    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net (4) (3)
Gain(loss)excludedfromassessmentofeffectiveness | Change in AOCI    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net (16) (69)
Cash Flow Hedging | Gain (Loss) on Investments | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 23 22
Cash Flow Hedging | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Cash Flow Hedging | Investment Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 71 93
Cash Flow Hedging | Other Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 54 (147)
Cash Flow Hedging | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Cash Flow Hedging | Interest Credited To Policyholder Account Balances | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Cash Flow Hedging | Policyholder Benefits | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Cash Flow Hedging | Change in AOCI | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 767 (121)
Net Investment Hedging | Gain (Loss) on Investments | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Net Investment Hedging | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Net Investment Hedging | Investment Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Net Investment Hedging | Other Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Net Investment Hedging | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Net Investment Hedging | Interest Credited To Policyholder Account Balances | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Net Investment Hedging | Policyholder Benefits | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Net Investment Hedging | Change in AOCI | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 10 (15)
Interest Rate | Gain (Loss) on Investments | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 15 189
Interest Rate | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net (77) 141
Interest Rate | Investment Income | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Other Income | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Interest Expense | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Interest Credited To Policyholder Account Balances | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Policyholder Benefits | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Change in AOCI | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Fair Value Hedging | Gain (Loss) on Investments | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 2 (3)
Interest Rate | Fair Value Hedging | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Fair Value Hedging | Investment Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Fair Value Hedging | Other Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Fair Value Hedging | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Fair Value Hedging | Interest Credited To Policyholder Account Balances | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net (8) 35
Interest Rate | Fair Value Hedging | Policyholder Benefits | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 30
Interest Rate | Fair Value Hedging | Change in AOCI | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Fair Value Hedged Item | Gain (Loss) on Investments    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge (3) 3
Interest Rate | Fair Value Hedged Item | Market Risk Benefit, Increase (Decrease) from Equity Market Change)    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0
Interest Rate | Fair Value Hedged Item | Investment Income    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 7 5
Interest Rate | Fair Value Hedged Item | Other Income    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0
Interest Rate | Fair Value Hedged Item | Interest Expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0
Interest Rate | Fair Value Hedged Item | Interest Credited To Policyholder Account Balances    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 3 (49)
Interest Rate | Fair Value Hedged Item | Policyholder Benefits    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge (5) (32)
Interest Rate | Fair Value Hedged Item | Change in AOCI    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0
Interest Rate | Cash Flow Hedging | Gain (Loss) on Investments | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Cash Flow Hedging | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Cash Flow Hedging | Investment Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net (2) (3)
Interest Rate | Cash Flow Hedging | Other Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Cash Flow Hedging | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Cash Flow Hedging | Interest Credited To Policyholder Account Balances | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Cash Flow Hedging | Policyholder Benefits | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Interest Rate | Cash Flow Hedging | Change in AOCI | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 1 8
Currency | Gain (Loss) on Investments | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 (174)
Currency | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Investment Income | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Other Income | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 (1)
Currency | Interest Expense | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Interest Credited To Policyholder Account Balances | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Policyholder Benefits | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Change in AOCI | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Fair Value Hedging | Gain (Loss) on Investments | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Fair Value Hedging | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Fair Value Hedging | Investment Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Fair Value Hedging | Other Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Fair Value Hedging | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Fair Value Hedging | Interest Credited To Policyholder Account Balances | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Fair Value Hedging | Policyholder Benefits | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net (36) 53
Currency | Fair Value Hedging | Change in AOCI | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Fair Value Hedged Item | Gain (Loss) on Investments    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0
Currency | Fair Value Hedged Item | Market Risk Benefit, Increase (Decrease) from Equity Market Change)    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0
Currency | Fair Value Hedged Item | Investment Income    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0
Currency | Fair Value Hedged Item | Other Income    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0
Currency | Fair Value Hedged Item | Interest Expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0
Currency | Fair Value Hedged Item | Interest Credited To Policyholder Account Balances    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0
Currency | Fair Value Hedged Item | Policyholder Benefits    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 35 (53)
Currency | Fair Value Hedged Item | Change in AOCI    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 0 0
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Gain (Loss) on Investments    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Market Risk Benefit, Increase (Decrease) from Equity Market Change)    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Investment Income    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Other Income    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Interest Expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Interest Credited To Policyholder Account Balances    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Policyholder Benefits    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net (4) (3)
Currency | Gain(loss)excludedfromassessmentofeffectiveness | Change in AOCI    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net (16) (69)
Currency | Cash Flow Hedging | Gain (Loss) on Investments | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Cash Flow Hedging | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Cash Flow Hedging | Investment Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Cash Flow Hedging | Other Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Cash Flow Hedging | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Cash Flow Hedging | Interest Credited To Policyholder Account Balances | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Cash Flow Hedging | Policyholder Benefits | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Cash Flow Hedging | Change in AOCI | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 63 (26)
Currency | Net Investment Hedging | Gain (Loss) on Investments | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Net Investment Hedging | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Net Investment Hedging | Investment Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Net Investment Hedging | Other Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Net Investment Hedging | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Net Investment Hedging | Interest Credited To Policyholder Account Balances | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Net Investment Hedging | Policyholder Benefits | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency | Net Investment Hedging | Change in AOCI | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 10 (15)
Currency/Interest Rate | Gain (Loss) on Investments | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 109 (28)
Currency/Interest Rate | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Investment Income | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Other Income | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Interest Expense | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Interest Credited To Policyholder Account Balances | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Policyholder Benefits | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Change in AOCI | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Cash Flow Hedging | Gain (Loss) on Investments | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 23 22
Currency/Interest Rate | Cash Flow Hedging | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Cash Flow Hedging | Investment Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 73 96
Currency/Interest Rate | Cash Flow Hedging | Other Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 54 (147)
Currency/Interest Rate | Cash Flow Hedging | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Cash Flow Hedging | Interest Credited To Policyholder Account Balances | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Cash Flow Hedging | Policyholder Benefits | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Cash Flow Hedging | Change in AOCI | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 703 (103)
Currency/Interest Rate | Net Investment Hedging | Gain (Loss) on Investments | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Net Investment Hedging | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Net Investment Hedging | Investment Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Net Investment Hedging | Other Income | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Net Investment Hedging | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Net Investment Hedging | Interest Credited To Policyholder Account Balances | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Net Investment Hedging | Policyholder Benefits | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Currency/Interest Rate | Net Investment Hedging | Change in AOCI | Derivatives Designated as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Credit Risk Contract | Gain (Loss) on Investments | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net (29) (11)
Credit Risk Contract | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Credit Risk Contract | Investment Income | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Credit Risk Contract | Other Income | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Credit Risk Contract | Interest Expense | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Credit Risk Contract | Interest Credited To Policyholder Account Balances | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Credit Risk Contract | Policyholder Benefits | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Credit Risk Contract | Change in AOCI | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Equity | Gain (Loss) on Investments | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net (1,387) (1,469)
Equity | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 271 202
Equity | Investment Income | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Equity | Other Income | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Equity | Interest Expense | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Equity | Interest Credited To Policyholder Account Balances | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Equity | Policyholder Benefits | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Equity | Change in AOCI | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Embedded Derivative Financial Instruments | Gain (Loss) on Investments | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 1,829 1,257
Embedded Derivative Financial Instruments | Market Risk Benefit, Increase (Decrease) from Equity Market Change) | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Embedded Derivative Financial Instruments | Investment Income | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Embedded Derivative Financial Instruments | Other Income | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Embedded Derivative Financial Instruments | Interest Expense | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Embedded Derivative Financial Instruments | Interest Credited To Policyholder Account Balances | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Embedded Derivative Financial Instruments | Policyholder Benefits | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net 0 0
Embedded Derivative Financial Instruments | Change in AOCI | Derivatives Not Qualifying as Hedge Accounting Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments Gain (Loss) Recognized In Income Net $ 0 $ 0