Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 12.0	$ 23.8
Other comprehensive income (loss):
Amortization related to derivative securities, net of tax	0.6	1.6
Foreign currency translation adjustment	0.7	(0.7)
Total other comprehensive income	1.3	0.9
Comprehensive income attributable to non-controlling interests in consolidated Funds	0.0	0.0
Total comprehensive income attributable to controlling interests	$ 13.3	$ 24.7