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Discontinued Operations, Assets Held for Sale and Divestitures (Narrative) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2015
Sep. 30, 2014
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Restructuring $ 0.2   $ 0.2 $ 9.1 $ 3.0  
Net sales $ 301.0   318.5 853.1 864.0  
Multiemployer Plans, Withdrawal Obligation     $ 0.9   $ 0.9  
Gain (Loss) on Sale of Assets and Asset Impairment Charges   $ 2.5        
St. Jerome [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Restructuring       7.2    
Disposal Group, Including Discontinued Operation, Operating Income (Loss)       2.5    
Environmental Remediation Expense       2.3    
Severance Costs       $ 2.4    
Net sales           $ 11.5