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Inventories - Components of Inventories (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 56.0us-gaap_InventoryRawMaterialsAndSuppliesNetOfReserves $ 47.2us-gaap_InventoryRawMaterialsAndSuppliesNetOfReserves
Work-in-process 9.8us-gaap_InventoryWorkInProcessNetOfReserves 9.0us-gaap_InventoryWorkInProcessNetOfReserves
Finished goods 110.6us-gaap_InventoryFinishedGoodsNetOfReserves 100.4us-gaap_InventoryFinishedGoodsNetOfReserves
Inventories $ 176.4us-gaap_InventoryNet $ 156.6us-gaap_InventoryNet