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Inventories - Component of Inventories (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Inventory Disclosure [Abstract]    
Inventory, Raw Materials, Net of Reserves $ 51.7 $ 46.1
Inventory, Work in Process, Net of Reserves 31.5 24.3
Inventory, Finished Goods, Net of Reserves 48.2 39.4
Total inventories $ 131.4 $ 109.8