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Inventories (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Inventories [Abstract]    
Raw materials and supplies $ 134.0 $ 128.4
Work in process 30.3 28.2
Finished products 83.4 82.2
Inventory reserves (41.7) (40.4)
Inventories, net $ 206.0 $ 198.4