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Components of Inventories (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Inventory, Finished Goods and Work in Process, Net of Reserves [Abstract]    
Raw materials and supplies $ 84.4 $ 85.6
Work in process 34.1 30.8
Finished goods 264.3 214.3
Total $ 382.8 $ 330.7