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Inventories - Major Components of Inventory (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Finished goods $ 118.0 $ 109.4
Work in process 17.9 15.3
Raw materials and supplies 65.7 63.4
Total inventory, net $ 201.6 $ 188.1