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Goodwill by Reportable Segment (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]    
Goodwill $ 24,399 $ 25,597
Latin America
   
Segment Reporting Information [Line Items]    
Goodwill 1,223 1,262
Asia Pacific
   
Segment Reporting Information [Line Items]    
Goodwill 2,497 2,504
EEMEA
   
Segment Reporting Information [Line Items]    
Goodwill 2,286 2,764
Europe Segment
   
Segment Reporting Information [Line Items]    
Goodwill 9,386 10,026
North America Segment
   
Segment Reporting Information [Line Items]    
Goodwill $ 9,007 $ 9,041