Income Taxes - Income Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Domestic	$ 21,243	$ 16,211	$ 16,646
Foreign	(2,150)	(2,146)	350
Income before income taxes	$ 19,093	$ 14,065	$ 16,996