Goodwill and Other Intangible Assets - Goodwill (Details) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 2,592
Goodwill, Acquired During Period	52
Other	(15)	[1]
Ending Balance	2,629
United States (U.S.)
Goodwill [Roll Forward]
Beginning Balance	1,367
Goodwill, Acquired During Period	52
Other	0	[1]
Ending Balance	1,419
International
Goodwill [Roll Forward]
Beginning Balance	1,225
Goodwill, Acquired During Period	0
Other	(15)	[1]
Ending Balance	$ 1,210

[1] Includes adjustments for foreign currency translation.