v3.10.0.1
Goodwill and Other Intangible Assets, net (Movement in Goodwill) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Goodwill [Roll Forward]    
Beginning Balance $ 7,666 $ 7,324
Changes due to:    
Currency (477) 342
Ending Balance 7,189 7,666
European Union [Member]    
Goodwill [Roll Forward]    
Beginning Balance 1,419 1,238
Changes due to:    
Currency (62) 181
Ending Balance 1,357 1,419
Eastern Europe [Member]    
Goodwill [Roll Forward]    
Beginning Balance 321 281
Changes due to:    
Currency (18) 40
Ending Balance 303 321
Middle East And Africa [Member]    
Goodwill [Roll Forward]    
Beginning Balance 102 91
Changes due to:    
Currency (15) 11
Ending Balance 87 102
South And Southeast Asia [Member]    
Goodwill [Roll Forward]    
Beginning Balance 3,010 3,030
Changes due to:    
Currency (215) (20)
Ending Balance 2,795 3,010
East Asia And Australia [Member]    
Goodwill [Roll Forward]    
Beginning Balance 567 566
Changes due to:    
Currency (31) 1
Ending Balance 536 567
Latin America & Canada [Member]    
Goodwill [Roll Forward]    
Beginning Balance 2,247 2,118
Changes due to:    
Currency (136) 129
Ending Balance $ 2,111 $ 2,247