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Inventories, net (Tables)
3 Months Ended
Mar. 31, 2013
Inventory Disclosure [Abstract]  
Inventories

Inventories consist of (in millions):

 

     March 31,      December 31,  
     2013      2012  

Raw materials and supplies

   $ 1,246       $ 1,268   

Work in process

     1,064         905   

Finished goods and purchased products

     3,825         3,718   
  

 

 

    

 

 

 

Total

   $ 6,135       $ 5,891