Comprehensive Income - Components of Accumulated Other Comprehensive Income (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)
AOCI Attributable to Parent, Net of Tax
Beginning Balance (deficit)	$ 373.9
Change in other comprehensive loss	(3.0)
Ending Balance (deficit)	306.6
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax
Beginning Balance (deficit)	(2.3)
Change in other comprehensive loss	(0.2)
Ending Balance (deficit)	(2.5)
Effective Portion of Unrealized Loss on Cash Flow Hedge
AOCI Attributable to Parent, Net of Tax
Beginning Balance (deficit)	(0.4)
Change in other comprehensive loss	(2.8)
Ending Balance (deficit)	(3.2)
Total Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax
Beginning Balance (deficit)	(2.7)
Ending Balance (deficit)	$ (5.7)