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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2013
Components of Property, Plant and Equipment

Property, plant and equipment at December 31, 2013 and 2012 were:

 

                                     
     2013     2012  
     (in millions)  

Land and land improvements

    $ 617      $ 643   

Buildings and building improvements

      3,270        3,199   

Machinery and equipment

      12,351        11,992   

Construction in progress

      1,376        1,022   
  

 

 

    

 

 

  
     17,614        16,856   

Accumulated depreciation

      (7,367 )      (6,846 ) 
  

 

 

    

 

 

  

Property, plant and equipment, net

    $ 10,247      $ 10,010