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Goodwill and Intangible Assets - Goodwill by Segment (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]    
Goodwill $ 21,335 $ 20,848
Latin America    
Segment Reporting Information [Line Items]    
Goodwill 654 818
AMEA    
Segment Reporting Information [Line Items]    
Goodwill 3,147 3,151
Europe    
Segment Reporting Information [Line Items]    
Goodwill 7,668 7,523
North America    
Segment Reporting Information [Line Items]    
Goodwill $ 9,866 $ 9,356