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Inventories (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 66.7 $ 56.3
In process 53.6 49.1
Finished products 163.3 144.5
Other 32.6 31.2
Total inventory $ 316.2 $ 281.1