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Property, Plant and Equipment, net (Details) - USD ($)
$ in Millions
Jun. 30, 2017
Sep. 30, 2016
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 1,135.6 $ 937.7
Construction in Progress, Gross 79.3 57.7
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment 459.7 394.3
Property, Plant and Equipment, Net 675.9 543.4
Land, Buildings and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 196.2 196.9
Machinery Equipment And Other [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 597.2 553.1
Other Capitalized Property Plant and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 262.9 $ 130.0