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Property, Plant and Equipment (Detail) - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 14,884 $ 16,912
Accumulated depreciation (6,156) (7,085)
Property, plant and equipment, net 8,728 9,827
Land and Land Improvements    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 520 574
Buildings and Building Improvements    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 2,743 3,117
Machinery and Equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 10,143 11,737
Construction in Progress    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 1,478 $ 1,484