v3.26.1
Derivatives (Fair Value Hedges) (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]    
Cash Flow Hedge, Hedging Exposure, Maximum Period 3 years 3 years
Future policy benefits [Member] | Designated as Hedging Instrument [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Debt Instruments, Carrying Amount $ (2,404) $ (2,509)
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) 357 319
Policyholder Account Balances [Member] | Designated as Hedging Instrument [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Debt Instruments, Carrying Amount (2,358) (2,498)
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) 117 (35)
Fixed Maturities [Member] | Designated as Hedging Instrument [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) (57) (73)
Debt Instruments, Carrying Amount (2,635) (120)
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) $ 0 $ 0