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Inventories (Tables)
 12 Months Ended
Dec. 31, 2015
Components of Inventories

Inventories consisted of the following:

 

                                     
     As of December 31,  
     2015      2014  
     (in millions)  

Raw materials

    $ 782       $ 1,215   

Finished product

      1,930         2,434   
  

 

 

     

 

 

  
     2,712         3,649   

Inventory reserves

      (103 )       (169 ) 
  

 

 

     

 

 

  

Inventories, net

    $ 2,609       $ 3,480