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Acquisitions and Divestures (Schedule of Disposal Groups, Including Discontinued Operations) (Details) - USD ($)
$ in Millions
3 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Repayment of Krausz debt $ (13.2) $ 0.0
Prepaid Expenses and Other Current Assets [Member]    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Disposal Group, Including Discontinued Operation, Prepaid and Other Assets   0.8
Property, Plant and Equipment [Member]    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment   $ (0.4)