Income Taxes (Provision (Benefit) for Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 0	$ (2)	$ (1)
State	0	0	(1)
Total Current	0	(2)	(2)
Deferred:
Federal	0	371	(431)
State	0	38	22
Total Deferred	0	409	(409)
Provision (Benefit) for Income Taxes	$ 0	$ 407	$ (411)