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Inventories (Details) (USD $)
In Millions, unless otherwise specified
Mar. 30, 2012
Dec. 31, 2011
Inventories at Lower of Cost or Market    
Raw materials, components and sub-assemblies $ 145 $ 121
Work in process 148 143
Finished goods 67 53
Total $ 360 [1] $ 317
[1] Unaudited