v3.25.4
Federal Income Taxes - Reconciliation of the Effective Tax Rate Differences (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Tax Disclosure [Abstract]      
Income (loss) before taxes $ 1,068 $ 2,582 $ (2,461)
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Federal income tax expense (benefit) at federal statutory rate 224 542 (517)
Effects of Tax credits:      
Foreign tax credits (48) (36) (36)
Other tax credits (5) (3) (4)
Nontaxable or nondeductible items:      
Tax-preferred investment income (82) (32) (126)
Share-based compensation expense 2 3 3
Other nontaxable or nondeductible items 12 12 7
Changes in unrecognized tax benefits 0 (34) 0
Federal income tax expense (benefit) $ 103 $ 452 $ (673)
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Federal statutory rate 21.00% 21.00% 21.00%
Tax Jurisdiction of Domicile [Extensible Enumeration] UNITED STATES UNITED STATES UNITED STATES
Effects of Tax credits:      
Foreign tax credits (4.00%) (1.00%) 1.00%
Other tax credits 0.00% 0.00% 0.00%
Nontaxable or nondeductible items:      
Tax-preferred investment income (8.00%) (1.00%) 5.00%
Share-based compensation expense 0.00% 0.00% 0.00%
Other nontaxable or nondeductible items 1.00% 0.00% 0.00%
Changes in unrecognized tax benefits 0.00% (1.00%) 0.00%
Effective income tax rate 10.00% 18.00% 27.00%