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Inventories (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Inventory [Line Items]    
Raw materials and work-in-progress $ 315.1 $ 310.4
Finished goods 102.6 83.7
Gross inventories 417.7 394.1
Inventory valuation reserves (23.2) (20.5)
Inventories, net $ 394.5 $ 373.6