Income Tax (Provision for Income Tax) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 32	$ 30	$ (36)
State and local	12	6	4
Subtotal	44	36	(32)
Deferred:
Federal	(149)	(399)	(285)
Current and Deferred:
Provision for income tax expense (benefit)	$ (105)	$ (363)	$ (317)