Income Taxes (Provision (Benefit) for Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current:
Federal	$ 47	$ 0	$ (2)
State	4	0	0
Total Current	51	0	(2)
Deferred:
Federal	0	0	371
State	0	0	38
Total Deferred	0	0	409
Provision for Income Taxes	$ 51	$ 0	$ 407