Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 24.6	$ 12.7	$ 49.2	$ 37.0
Other comprehensive income:
Foreign currency translation	0.3	0.0	0.1	0.1
Total comprehensive income	$ 24.9	$ 12.7	$ 49.3	$ 37.1