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Property, Plant and Equipment (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 17,471 $ 17,614
Accumulated depreciation (7,319) (7,367)
Property, plant and equipment, net 10,152 10,247
Land and Land Improvements
    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 557 617
Buildings and Building Improvements
    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 3,182 3,270
Machinery and Equipment
    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 12,112 12,351
Construction in Progress
    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 1,620 $ 1,376