Goodwill and Other Intangible Assets, net (Movement in Goodwill) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020 USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 5,858
Changes due to:
Currency	(211)
Ending Balance	5,647
European Union [Member]
Goodwill [Roll Forward]
Beginning Balance	1,338
Changes due to:
Currency	18
Ending Balance	1,356
Eastern Europe [Member]
Goodwill [Roll Forward]
Beginning Balance	300
Changes due to:
Currency	3
Ending Balance	303
Middle East & Africa [Member]
Goodwill [Roll Forward]
Beginning Balance	89
Changes due to:
Currency	(15)
Ending Balance	74
South & Southeast Asia [Member]
Goodwill [Roll Forward]
Beginning Balance	2,898
Changes due to:
Currency	(116)
Ending Balance	2,782
East Asia & Australia [Member]
Goodwill [Roll Forward]
Beginning Balance	551
Changes due to:
Currency	(13)
Ending Balance	538
Latin America & Canada [Member]
Goodwill [Roll Forward]
Beginning Balance	682
Changes due to:
Currency	(88)
Ending Balance	$ 594