Income Taxes - Pretax Income (Loss) for Domestic and Foreign Operations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
United States	$ 1,529	$ (590)	$ 125
Foreign	179	(366)	162
Income (loss) before income taxes	$ 1,708	$ (956)	$ 287