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Summary of Asset Impairment and Exit Costs (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Impaired Assets to be Disposed of by Method Other than Sale [Line Items]        
Asset impairment charges     $ 138 $ 27
2012-2014 Restructuring Program and 2014-2018 Restructuring Program        
Impaired Assets to be Disposed of by Method Other than Sale [Line Items]        
Asset impairment charges $ 57 $ 14 135 26
2012-2014 Restructuring Program and 2014-2018 Restructuring Program | Latin America Segment        
Impaired Assets to be Disposed of by Method Other than Sale [Line Items]        
Asset impairment charges 21   34  
2012-2014 Restructuring Program and 2014-2018 Restructuring Program | Asia Pacific Segment        
Impaired Assets to be Disposed of by Method Other than Sale [Line Items]        
Asset impairment charges 9   28  
2012-2014 Restructuring Program and 2014-2018 Restructuring Program | EEMEA Segment        
Impaired Assets to be Disposed of by Method Other than Sale [Line Items]        
Asset impairment charges 2 1 2 1
2012-2014 Restructuring Program and 2014-2018 Restructuring Program | Europe Segment        
Impaired Assets to be Disposed of by Method Other than Sale [Line Items]        
Asset impairment charges 12   37 1
2012-2014 Restructuring Program and 2014-2018 Restructuring Program | North America Segment        
Impaired Assets to be Disposed of by Method Other than Sale [Line Items]        
Asset impairment charges $ 13 $ 13 $ 34 $ 24