Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax	$ 0.4	$ 0.0	$ 0.0
Net income	54.5	62.7	82.6
Other comprehensive income (loss), net of tax:
Foreign currency translation	0.4	(1.6)	0.6
Unrealized losses on hedging activities, net of tax	(1.6)	0.0
Unrealized losses on hedging activities, net of tax			0.0
Unrealized losses on pension benefit obligation, net of tax	(3.2)	(0.2)	0.0
Total other comprehensive income (loss), net of tax	(4.4)	(1.8)	0.6
Comprehensive income	50.1	60.9	83.2
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax, Attributable to Parent	$ 0.5	$ 0.0	$ 0.0