Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Components Of Income Tax Expense Benefit Continuing Operations [Abstract]
Federal, current	$ 587	$ 1,128	$ 1,896
State, current	77	194	304
Foreign, current	35	17	13
Total current	699	1,339	2,213
Federal, deferred	(108)	20	77
State, deferred	(7)	(19)	(120)
Foreign, deferred	(1)	20	(4)
Total deferred	(116)	21	(47)
Total provision for income taxes	$ 583	$ 1,360	$ 2,166