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Inventories (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Inventory Disclosure [Abstract]    
Raw materials $ 72.2 $ 66.5
In process 58.1 46.1
Finished products 151.8 133.8
Other 31.3 32.2
Total inventories $ 313.4 $ 278.6