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Inventories (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Inventories    
Raw materials and supplies $ 800 $ 724
Work-in-process 229 202
Finished goods 253 226
Tooling and engineering 763 670
Inventory, Net, Total $ 2,045 $ 1,822