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Segments - Additional Information (Details) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) segment | Sep. 30, 2016 USD ($)
Segment Reporting [Abstract] |  |  |  |
Number of reportable segments | segment |  |  | 2 |
Change in Accounting Estimate [Line Items] |  |  |  |
Adjusted EBITDA from continuing operations | $ 216.8 | $ 212.9 | $ 595.0 | $ 592.8
Modified calculation of Adjusted EBITDA to exclude interest income | Restatement Adjustment |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |
Adjusted EBITDA from continuing operations |  | $ 1.6 |  | $ 5.3

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