v3.26.3
Derivative Instruments - Schedule of Gains and Losses, and Change in Fair Value of Derivatives (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Derivative Investments, Excluding Non-Qualified Voluntary Deferred Compensation        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gains (losses) on derivative instruments $ (1,200) $ (1,378) $ (3,435) $ (3,117)
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 (1,530) (1,196) (3,666) (2,538)
Derivatives related to funds withheld under reinsurance treaties        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gains (losses) on derivative instruments 330 (182) 231 (579)
Derivatives related to non-qualified voluntary deferred compensation plan        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gains (losses) on derivative instruments (6) 17 25 17
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 (17) (52) (12) 33
Cross-currency swaps | Derivatives related to funds withheld under reinsurance treaties        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gains (losses) on derivative instruments (3) 3 (3) (7)
Equity index call 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 (27) 0 (34) 0
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 69 1 877 (465)
Equity index futures | Derivatives related to non-qualified voluntary deferred compensation plan        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gains (losses) on derivative instruments 1 13 10 13
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 (110) (146) (483) (457)
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 202 (11) 268 26
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 (898) 86 (1,013) 15
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 63 (127) (584) (191)
Total return swaps | Derivatives related to non-qualified voluntary deferred compensation plan        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gains (losses) on derivative instruments (7) 4 15 4
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 (914) 162 (930) 210
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) (7) (32) (18)
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 108 (1,102) (1,723) (1,691)
Cross-currency forwards | Derivatives related to funds withheld under reinsurance treaties        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gains (losses) on derivative instruments 1 10 3 (46)
Funds withheld embedded derivative | Derivatives related to funds withheld under reinsurance treaties        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gains (losses) on derivative instruments $ 332 $ (195) $ 231 $ (526)