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Segments - Additional Information (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) segment | Jun. 30, 2016 USD ($)
Segment Reporting [Abstract] |  |  |  |
Number of reportable segments | segment |  |  | 2 |
Change in Accounting Estimate [Line Items] |  |  |  |
Adjusted EBITDA from continuing operations | $ 196.3 | $ 193.7 | $ 378.2 | $ 379.9
Modified calculation of Adjusted EBITDA to exclude interest income |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |
Adjusted EBITDA from continuing operations |  | $ 2.0 |  |
Modified calculation of Adjusted EBITDA to exclude interest income | Restatement Adjustment |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |
Adjusted EBITDA from continuing operations |  |  |  | $ 3.6

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