Income Taxes - Income Tax Domestic and Foreign (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
U.S. income	$ 3,401	$ 3,493	$ 4,557
Foreign (loss) income	(50)	37	46
Income from continuing operations before income taxes	$ 3,351	$ 3,530	$ 4,603