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Inventories (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Inventory [Line Items]    
Raw materials and work-in-progress $ 281.0 $ 310.4
Finished goods 62.2 83.7
Gross inventories 343.2 394.1
Inventory valuation reserves (27.4) (20.5)
Inventories, net $ 315.8 $ 373.6