Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income tax provision (benefit)	$ 33.0	$ (9.5)	$ 17.3	$ (23.2)
Effective income tax rate, continuing operations (as a percent)	39.60%	10.80%	35.70%	19.90%
Statutory tax rate	35.00%	35.00%	35.00%	35.00%
Valuation allowance on deferred tax assets	$ 71.6		$ 71.6