Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Current:
Federal	$ 1	$ (2)
State	2	(1)
Total	3	(3)
Deferred:
Federal	94	115
State	21	29
Total	115	144
Provision (benefit) for income taxes	$ 118	$ 141