Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 3,164	$ 2,732	$ 2,895	$ 2,587
Net change in accumulated other comprehensive income (loss)	(37)	10	(44)	(68)
Ending Balance	3,216	2,768	3,216	2,768
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	27	(20)	21	41
Foreign Currency Translation Adjustment Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(1,106)	(1,165)	(1,099)	(1,087)
Net change in accumulated other comprehensive income (loss)	(37)	10	(44)	(68)
Ending Balance	(1,143)	(1,155)	(1,143)	(1,155)
Net translation on investments in foreign operations
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Net change in accumulated other comprehensive income (loss)	(125)	69	(111)	(139)
Net hedges of investments in foreign operations
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Net change in accumulated other comprehensive income (loss)	88	(59)	67	71
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	27	(19)	21	22
Net translation on investments in foreign operations
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	$ 0	$ (1)	$ 0	$ 19