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Discontinued Operations (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Revenue |  |  |  |  |  |  |  |  | $ 0.0 | $ 0.0 | $ 0.0
Restructuring Charges |  |  |  |  |  |  |  |  | 3.5 | 4.3 |
Disposal Group, Including Discontinued Operation, Other Income |  |  |  |  |  |  |  |  | 0.1 |  |
Liabilities of discontinued operations: |  |  |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |  | 0.0 | (0.7)
Loss from discontinued operations before income taxes |  |  |  |  |  |  |  |  | 0.1 | 0.0 | (0.7)
Income tax (provision) benefit |  |  |  |  |  |  |  |  | 0.0 | 0.0 | (0.1)
Loss from discontinued operations | $ 0.0 | $ 0.1 | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0 | 0.1 | 0.0 | $ (0.8)
Discontinued Operations, Disposed of by Sale [Member] |  |  |  |  |  |  |  |  |  |  |
Assets of discontinued operations: |  |  |  |  |  |  |  |  |  |  |
Assets held for sale | 1.0 |  |  |  | 1.0 |  |  |  | 1.0 | 1.0 |
Other assets | 2.4 |  |  |  | 2.5 |  |  |  | 2.4 | 2.5 |
Liabilities of discontinued operations: |  |  |  |  |  |  |  |  |  |  |
Current liabilities | $ 0.1 |  |  |  | $ 0.1 |  |  |  | $ 0.1 | $ 0.1 |

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