Income Taxes (Schedule of Earnings (Loss) from Continuing Operations Before Tax by Jurisdiction) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
US	$ 1,530	$ 252	$ 480
International	721	736	1,030
Earnings (loss) from continuing operations before tax	$ 2,251	$ 988	$ 1,510