Income Taxes (Earnings Before Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
United States	$ 442	$ 756	$ 972
Foreign	1,441	832	1,088
Earnings Before Income Taxes	$ 1,883	$ 1,588	$ 2,060