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Discontinued Operations (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Net sales $ 0.0 $ 0.0 $ 0.0 $ 0.0  
Other income 0.1 0.1   0.1  
Other expense     (0.3)    
Loss from discontinued operations before income taxes 0.1 0.1 (0.3) 0.1  
Income tax (provision) benefit 0.0 0.0 0.0 0.0  
Loss from discontinued operations 0.1 $ 0.1 (0.3) $ 0.1  
Discontinued Operations, Disposed of by Sale [Member]          
Assets of discontinued operations:          
Current assets 0.8   0.8   $ 1.0
Other assets 1.4   1.4   2.4
Liabilities of discontinued operations:          
Current liabilities $ 0.1   $ 0.1   $ 0.1