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Inventories - Components of Inventories (Details) - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Finished goods $ 82.8 $ 77.6
Raw materials 38.5 35.3
Work in process 6.2 7.2
Total inventories $ 127.5 $ 120.1