Comprehensive (Loss) Income - Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
December 31, 2015	$ 250.1
Change in other comprehensive income (loss)	(0.1)	$ (0.5)
March 31, 2016	249.6
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
December 31, 2015	(1.2)
Change in other comprehensive income (loss)	0.1
March 31, 2016	(1.1)
Effective Portion of Unrealized Gain (Loss) on Cash Flow Hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
December 31, 2015	0.1
Change in other comprehensive income (loss)	(0.2)
March 31, 2016	(0.1)
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
December 31, 2015	(1.1)
Change in other comprehensive income (loss)	(0.1)
March 31, 2016	$ (1.2)