Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 114.5	$ 134.2
Foreign currency translation adjustment	(2.1)	0.5
Amortization related to derivatives securities, before tax	0.7	0.7
Tax impact	(0.2)	(0.1)
Other comprehensive income (loss)	(1.6)	1.1
Ending balance	119.3	8.4
Foreign currency translation adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	2.8	1.8
Foreign currency translation adjustment	(2.1)	0.5
Other comprehensive income (loss)	(2.1)	0.5
Ending balance	0.7	2.3
Valuation and amortization of derivative securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(20.3)	(22.7)
Amortization related to derivatives securities, before tax	0.7	0.7
Tax impact	(0.2)	(0.1)
Other comprehensive income (loss)	0.5	0.6
Ending balance	(19.8)	(22.1)
AOCI Including Portion Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(17.5)	(20.9)
Ending balance	$ (19.1)	$ (19.8)