Income Taxes - Components of Income Tax Expense From Continuing Operations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Federal income taxes:
Current	$ 565	$ 264	$ 175
Deferred	(41)	(11)	18
Total federal income taxes	524	253	193
State income taxes:
Current	80	43	35
Deferred	(4)	(3)	6
Total state income taxes	76	40	41
Foreign income taxes:
Total current foreign income taxes	0	0	1
Income tax expense	$ 600	$ 293	$ 235