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Goodwill by Reportable Segment (Detail) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]    
Goodwill $ 25,527 $ 25,597
Latin America
   
Segment Reporting Information [Line Items]    
Goodwill 1,312 1,262
Asia Pacific
   
Segment Reporting Information [Line Items]    
Goodwill 2,588 2,504
EEMEA
   
Segment Reporting Information [Line Items]    
Goodwill 2,494 2,764
Europe Segment
   
Segment Reporting Information [Line Items]    
Goodwill 10,089 10,026
North America Segment
   
Segment Reporting Information [Line Items]    
Goodwill $ 9,044 $ 9,041