Income Taxes (Schedule of Provision for Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current income tax expense:
United States federal	$ 155	$ 80	$ (17)
United States state and local	97	20	46
International	272	207	324
Total current income tax expense	524	307	353
Deferred income tax (benefit) expense:
United States federal	(82)	1	10
United States state and local	(23)	(25)	(1)
International	(132)	72	117
Total deferred income tax (benefit) expense	(237)	48	126
Total income tax expense	$ 287	$ 355	$ 479