Income Taxes - Schedule of Changes in Valuation Allowance (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	$ (2,127)	$ (1,778)	$ (1,684)
Establishment of new allowances	(103)
Net change to existing allowances	139	(315)	(101)
Foreign currency translation	29	(34)	7
Balance at end of year	$ (2,062)	$ (2,127)	$ (1,778)