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Inventories - Components of Inventories (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Finished goods $ 99.2 $ 95.3
Raw materials 86.2 76.6
Work in process 19.2 13.1
Total inventories $ 204.6 $ 185.0