Income Taxes - Schedule of Components of Income Tax Expense/(Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 235	$ 80	$ 106
State	39	14	14
Deferred:
Federal	(1)	(15)	5
State	1	(3)	9
Total	$ 274	$ 76	$ 134