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Accounting Policies and Basis of Presentation - Narrative (Details) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) | Mar. 31, 2016 USD ($) | Sep. 30, 2017 USD ($) segment | Sep. 30, 2016 USD ($)
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |
Number of reportable segments | segment |  |  |  | 1 |
Shares received per parent share |  |  | 100.00% |  |
Loss on debt extinguishment |  |  |  |  | $ 76.3
Loss from continuing operations | $ (9.7) | $ 138.9 |  | $ 25.6 | 336.6
Net cash used for operating activities of continuing operations |  |  |  | (33.9) | (180.2)
Net cash used for operating activities of discontinued operations |  |  |  | $ 0.3 | $ 49.3
Revisions |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |
Loss on debt extinguishment |  |  | $ 4.3 |  |
Overstated income tax expense |  |  | 0.8 |  |
Loss from continuing operations |  |  | 3.5 |  |
Comprehensive loss |  |  | 2.6 |  |
Retained earnings adjustment |  |  | 2.6 |  |
Net cash used for operating activities of continuing operations |  |  | 16.2 |  |
Net cash used for operating activities of discontinued operations |  |  | $ 16.2 |  |

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