Provision (Benefit) for Income Taxes from Continuing Operations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Current Federal	$ 1	$ (57)	$ 14
Current State	1	1	6
Current Foreign	0	1	3
Current Income Tax Expense (Benefit), Total	2	(55)	23
Deferred Federal	(66)	(96)	3
Deferred State	(24)	(63)	1
Deferred Foreign	(3)	(6)	3
Deferred income taxes	(93)	(165)	7
Total	$ (91)	$ (220)	$ 30