Income Taxes (Schedule of Income before Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income, United States	$ 3,498	$ (2,762)	$ 1,594
Income, Foreign	1,433	409	2,558
Income from continuing operations before income taxes	$ 4,931	$ (2,353)	$ 4,152