Income Taxes - Schedule of Components of Income Tax Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current expense:
Federal	$ 1,113	$ 979	$ 357
State	91	155	97
Total current expense	1,204	1,134	454
Deferred expense:
Federal	235	(131)	290
State	117	(22)	38
Total deferred expense	352	(153)	328
Provision for income taxes	$ 1,556	$ 981	$ 782