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Inventories (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Inventory [Line Items]    
Raw materials and work-in-progress $ 334.3 $ 276.2
Finished goods 83.8 70.4
Gross inventories 418.1 346.6
Inventory valuation reserves (23.1) (23.4)
Inventories, net $ 395.0 $ 323.2