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Inventories - Components of Inventories (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Finished goods $ 99.8 $ 86.8
Raw materials 79.5 79.5
Work in process 17.3 16.6
Total inventories $ 196.6 $ 182.9