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Discontinued Operations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Cash Provided by (Used in) Operating Activities, Discontinued Operations $ (1.8) $ (2.6) $ (4.3)
Loss from discontinued operations before taxes (2.0) (0.8) (3.2)
Product Warranty Accrual, Discontinued Operations 1.5 0.5 2.5
Damages from Product Defects [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Cash Provided by (Used in) Operating Activities, Discontinued Operations $ 1.3 2.3 3.6
Product Warranty Accrual, Discontinued Operations   $ (0.8) $ 2.5