Income Taxes, Components of Income (Loss) Before Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Components of Income (Loss) Before Income Tax Expense (Benefit)
U.S. operations	$ 1,023	$ (2,072)	$ 2,496
Foreign operations	520	62	990
Income (loss) before income tax expense (benefit)	$ 1,543	$ (2,010)	$ 3,486