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Inventories (Tables)
9 Months Ended
Sep. 30, 2012
Inventory, Net [Abstract]  
Inventories
 At
 September 30, December 31,
(In millions)2012 2011
      
Raw materials and work in process$9,552 $8,735
Finished goods 6,158  5,022
Unbilled shipments 723  485
  16,433  14,242
Less revaluation to LIFO (411)  (450)
Total$16,022 $13,792