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Inventories (Components of Inventory) (Details) - USD ($)
$ in Millions
Sep. 30, 2016
Dec. 31, 2015
Components of inventory    
Finished goods $ 137.2 $ 147.5
Work in process 45.1 37.4
Raw materials and supplies 69.1 64.1
Inventories, net $ 251.4 $ 249.0