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Acquisitions and Divestures (Schedule of Disposal Groups, Including Discontinued Operations) (Details) - USD ($)
$ in Millions
9 Months Ended
Jun. 30, 2019
Jun. 30, 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)