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Income Taxes - Difference Between Effective Tax Rate (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax provision (benefit) at federal statutory rate	$ 3	$ (90)	$ (19)
Foreign tax rate differential	2	1	2
State income tax provision (benefit), net of federal benefit	(1)	(4)	0
Nondeductible expenses	0	2	3
Investment in subsidiaries			9
Nondeductible goodwill impairment		25	16
Change in valuation allowance	2	61	9
Other	1	2	2
Income tax provision (benefit)	$ 7	$ (3)	$ 4
Effective tax rate	54.80%	0.60%	(4.40%)

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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