v3.26.1
Derivative Instruments - Schedule of Gains and Losses, and Change in Fair Value of Derivatives (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Derivative Investments, Excluding Non-Qualified Voluntary Deferred Compensation    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments $ 348 $ 1,191
Derivatives excluding funds withheld under reinsurance treaties and non-qualified voluntary deferred compensation plan    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments 330 1,409
Derivatives related to funds withheld under reinsurance treaties    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments 18 (218)
Derivatives related to non-qualified voluntary deferred compensation plan    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments (9) 0
Cross-currency swaps | Derivatives excluding funds withheld under reinsurance treaties and non-qualified voluntary deferred compensation plan    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments 18 27
Cross-currency swaps | Derivatives related to funds withheld under reinsurance treaties    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments 2 1
Equity index futures | Derivatives excluding funds withheld under reinsurance treaties and non-qualified voluntary deferred compensation plan    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments (433) 147
Equity index futures | Derivatives related to non-qualified voluntary deferred compensation plan    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments (6) 0
Equity index put options | Derivatives excluding funds withheld under reinsurance treaties and non-qualified voluntary deferred compensation plan    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments 23 108
Interest rate swaps | Derivatives excluding funds withheld under reinsurance treaties and non-qualified voluntary deferred compensation plan    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments 24 28
Interest rate futures | Derivatives excluding funds withheld under reinsurance treaties and non-qualified voluntary deferred compensation plan    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments (106) 476
Total return swaps | Derivatives excluding funds withheld under reinsurance treaties and non-qualified voluntary deferred compensation plan    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments 107 112
Total return swaps | Derivatives related to non-qualified voluntary deferred compensation plan    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments (3) 0
Bond forwards | Derivatives excluding funds withheld under reinsurance treaties and non-qualified voluntary deferred compensation plan    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments (67) 115
Fixed index annuity embedded derivatives | Derivatives excluding funds withheld under reinsurance treaties and non-qualified voluntary deferred compensation plan    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments 6 (1)
Registered index linked annuity embedded derivatives | Derivatives excluding funds withheld under reinsurance treaties and non-qualified voluntary deferred compensation plan    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments 758 397
Cross-currency forwards | Derivatives related to funds withheld under reinsurance treaties    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments 2 (18)
Funds withheld embedded derivative | Derivatives related to funds withheld under reinsurance treaties    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) on derivative instruments $ 14 $ (201)