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Inventories (Details) - USD ($)
$ in Millions
Sep. 30, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 108.7 $ 97.7
Work in process 50.6 53.0
Finished goods 75.6 82.4
Total inventories, net 234.9 233.1
Inventory valuation reserve $ 9.6 $ 9.0