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Property, Plant and Equipment - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Property, Plant and Equipment [Line Items]    
Capital expenditures $ 335 $ 439
Accrued capital expenditures unpaid 211  
Payments for capital expenditures accrued in the prior year 322  
Asset impairment charges 67 78
2014-2018 Restructuring Program    
Property, Plant and Equipment [Line Items]    
Asset impairment charges $ 52 $ 78