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Property, Plant and Equipment ,Net (Detail) - USD ($)
$ in Millions
Mar. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment, Net    
Property, plant and equipment, at cost $ 9,134 $ 8,990
Accumulated depreciation (4,731) (4,604)
Property, plant and equipment, net $ 4,403 $ 4,386