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Inventories (Details) - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Inventory [Line Items]    
Raw materials and work-in-progress $ 220.4 $ 212.7
Finished goods 28.9 33.8
Gross inventories 249.3 246.5
Inventory valuation reserves (27.7) (27.0)
Inventories, net $ 221.6 $ 219.5