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Inventories (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Inventory Disclosure [Abstract]    
Finished goods $ 75.5 $ 70.9
Work in process 28.8 23.6
Raw materials 72.2 67.7
Total inventories $ 176.5 $ 162.2