Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 436	$ 114	$ 204
State	132	91	94
Foreign	41	27	36
Current tax total	609	232	334
Deferred:
Federal	(55)	149	94
State	(22)	10	8
Foreign		6	(2)
Deferred tax total	(77)	165	100
Income tax expense	$ 532	$ 397	$ 434