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Fixed Assets - Components of Fixed Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Property plant and equipment, gross $ 14,545 $ 12,934
Property plant and equipment, net 7,022 5,948
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property plant and equipment, gross 254 259
Building [Member]    
Property, Plant and Equipment [Line Items]    
Property plant and equipment, gross 1,942 1,659
Accumulated depreciation (652) (590)
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property plant and equipment, gross 12,349 11,016
Accumulated depreciation $ (6,871) $ (6,396)