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