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Inventories (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Inventory [Line Items]    
Raw materials and work-in-progress $ 296.3 $ 276.2
Finished goods 65.6 70.4
Gross inventories 361.9 346.6
Inventory valuation reserves (23.8) (23.4)
Inventories, net $ 338.1 $ 323.2