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Inventories (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Inventory Disclosure [Abstract]    
Finished goods $ 71.5 $ 67.1
Work in process 24.2 19.6
Raw materials 70.2 65.1
Total inventories $ 165.9 $ 151.8