Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 11.5	$ 11.5	$ 27.2	$ 23.5
Other comprehensive income:
Amortization related to derivative securities, net of tax	0.6	0.6	1.3	1.2
Foreign currency translation adjustment, net of tax	0.2	0.8	0.0	1.5
Total other comprehensive income	0.8	1.4	1.3	2.7
Comprehensive income attributable to non-controlling interests in consolidated Funds	0.5	0.1	1.6	0.1
Total comprehensive income attributable to controlling interests	$ 11.8	$ 12.8	$ 26.9	$ 26.1