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Inventories
6 Months Ended
Jun. 30, 2011
Inventories [Abstract]  
Inventories
7. Inventories
Inventories consisted of the following (in millions):
               
        June 30,         December 31,
    2011     2010
Raw materials
  $ 157     $ 128
Work in process
    1,553       1,382
Finished goods
    520       512
 
         
 
  $ 2,230     $ 2,022