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Inventories (Details) - USD ($)
$ in Millions
Sep. 30, 2018
Dec. 31, 2017
Inventories [Abstract]    
Raw materials and supplies $ 136.7 $ 132.9
Work in process 30.3 27.7
Finished products 81.1 82.4
Inventory reserves (35.9) (38.1)
Total Inventory $ 212.2 $ 204.9