Income Taxes - Federal Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Current income tax expense	$ (2,673)	$ (3,862)	$ (1,003)
Deferred income tax expense	43	942	(1,658)
Total income tax expense	$ (2,630)	$ (2,920)	$ (2,661)