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Inventories - Schedule of Inventories (Details) - USD ($)
$ in Millions
Sep. 30, 2017
Jun. 30, 2017
Inventory, Net [Abstract]    
Raw materials and supplies $ 172.0 $ 152.8
Work in process 383.1 365.6
Finished and purchased products 182.2 172.0
Total inventory $ 737.3 $ 690.4