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Discontinued Operations, Assets Held for Sale and Divestitures (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Gain on sale of idle property $ 9.0   $ 0.0
Disposal Date   Jan. 06, 2017  
Restructuring 3.9   1.3
Revenue, Net 178.3   $ 167.2
Cash [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Disposal Group, Including Discontinued Operation, Consideration 7.4    
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, Consideration $ 0.8