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Inventories (Tables)
9 Months Ended
Sep. 30, 2011
Inventory, Net [Abstract] 
Inventories
 At
 September 30, December 31,
(In millions)2011 2010
      
Raw materials and work in process$9,200 $6,973
Finished goods 5,571  4,501
Unbilled shipments 644  456
  15,415  11,930
Less revaluation to LIFO (394)  (404)
Total$15,021 $11,526