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Inventories (Details) - USD ($)
$ in Millions
Sep. 30, 2019
Dec. 31, 2018
Inventory [Line Items]    
Raw materials and work-in-progress $ 337.3 $ 375.1
Finished goods 88.0 99.0
Gross inventories 425.3 474.1
Inventory valuation reserves (22.2) (14.4)
Inventories, net $ 403.1 $ 459.7