Income Taxes - Reconciliation of Unrecognized Tax Benefits (Excluding Interest and Penalties) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 4	$ 29	$ 30
Reductions for tax positions of prior years	0	(26)
Foreign currency translation	0	1	(1)
Balance at end of year	$ 4	$ 4	$ 29