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Inventories - Schedule of Inventory (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Finished products $ 294.8 $ 327.4
Semi-finished products 93.4 109.9
Raw materials 131.1 133.7
Stores and supplies 20.0 20.6
Total Inventories $ 539.3 $ 591.6