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Inventories (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Inventory, Net [Abstract]    
Raw materials $ 70.8 $ 65.9
Work in progress 30.2 21.3
Finished goods 65.3 60.8
Subtotal 166.3 148.0
Less reserves (26.2) (22.4)
Total $ 140.1 $ 125.6