Income Taxes - Schedule of Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Current, Federal	$ 1,118	$ 1,222	$ 1,769
Current, State	213	206	311
Current, Foreign	3	18	15
Deferred, Federal	241	261	24
Deferred, State	21	27	(18)
Deferred, Foreign	19	12	11
Provision for income taxes	$ 1,615	$ 1,746	$ 2,112