Income Taxes - Geographic Sources of Income (Loss) before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
U.S.	$ (724)	$ (14,232)	$ (693)
Foreign	1,152	(914)	1,446
Income (loss) before income taxes	$ 428	$ (15,146)	$ 753