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Inventories, Net (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Inventories, Net    
Finished goods $ 60 $ 62
Work in process 55 49
Raw materials 130 125
Total product inventory 245 236
Inventoried costs related to long-term contracts 73 65
Less - progress payments (50) (47)
Inventoried costs related to long-term contracts, net 23 18
Inventories, net $ 268 $ 254