v3.26.1
Derivatives (Derivatives Pertaining to Hedged Items) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Derivatives $ (508) $ 318
Net Derivative Gains (Losses) Recognized for Hedged Items (1) 2
Net investment income 1,236 1,269
Policyholder Benefits and Claims 0 1
Amount of Gains (Losses) Deferred in AOCI 97 (16)
Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Hedged Items (1) 5
Policyholder Benefits and Claims 0 0
Amount of Gains (Losses) Deferred in AOCI 0 0
Cash flow hedges:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Hedged Items 0 (3)
Policyholder Benefits and Claims 0 1
Amount of Gains (Losses) Deferred in AOCI 97 (16)
Net Derivative Gains (Losses) Recognized for Derivatives    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Derivatives (507) 316
Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Derivatives (505) 310
Net Derivative Gains (Losses) Recognized for Derivatives | Cash flow hedges:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Derivatives (2) 6
Net Investment Income    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income 12 14
Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income 0 0
Net Investment Income | Cash flow hedges:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income 12 14
Interest rate | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Hedged Items 0 0
Policyholder Benefits and Claims 0 0
Amount of Gains (Losses) Deferred in AOCI 0 0
Interest rate | Cash flow hedges:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Hedged Items 0 0
Policyholder Benefits and Claims 0 1
Amount of Gains (Losses) Deferred in AOCI 4 (7)
Interest rate | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Derivatives (190) 388
Interest rate | Net Derivative Gains (Losses) Recognized for Derivatives | Cash flow hedges:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Derivatives 0 3
Interest rate | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income 0 0
Interest rate | Net Investment Income | Cash flow hedges:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income 1 1
Foreign currency exchange rate | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Hedged Items (1) 5
Policyholder Benefits and Claims 0 0
Amount of Gains (Losses) Deferred in AOCI 0 0
Foreign currency exchange rate | Cash flow hedges:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Hedged Items 0 (3)
Policyholder Benefits and Claims 0 0
Amount of Gains (Losses) Deferred in AOCI 93 (9)
Foreign currency exchange rate | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Derivatives 25 (12)
Foreign currency exchange rate | Net Derivative Gains (Losses) Recognized for Derivatives | Cash flow hedges:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Derivatives (2) 3
Foreign currency exchange rate | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income 0 0
Foreign currency exchange rate | Net Investment Income | Cash flow hedges:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income 11 13
Credit | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Hedged Items 0 0
Policyholder Benefits and Claims 0 0
Amount of Gains (Losses) Deferred in AOCI 0 0
Credit | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Derivatives (1) (1)
Credit | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income 0 0
Equity market | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Hedged Items 0 0
Policyholder Benefits and Claims 0 0
Amount of Gains (Losses) Deferred in AOCI 0 0
Equity market | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Derivatives (1,151) (1,242)
Equity market | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income 0 0
Embedded | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Hedged Items 0 0
Policyholder Benefits and Claims 0 0
Amount of Gains (Losses) Deferred in AOCI 0 0
Embedded | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net Derivative Gains (Losses) Recognized for Derivatives 812 1,177
Embedded | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income $ 0 $ 0