Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue:
Other revenue	$ 0.0	$ 3.1	$ 0.0	$ 5.7
Total revenue	86.8	117.9	294.5	360.9
Operating expenses:
Compensation and benefits	34.9	67.2	108.7	193.2
General and administrative expense	17.5	16.5	50.9	53.6
Depreciation and amortization	4.2	5.4	14.8	16.7
Amortization of acquired intangibles	0.1	0.1	0.1	0.1
Total operating expenses	56.7	89.2	174.5	263.6
Operating income	30.1	28.7	120.0	97.3
Non-operating income and (expense):
Investment income (loss)	(0.4)	0.3	(1.2)	7.6
Interest income	0.2	0.0	0.3	0.1
Interest expense	(4.6)	(6.2)	(15.9)	(18.7)
Loss on extinguishment of debt	0.0	0.0	(3.2)	0.0
Gain on sale of subsidiaries	0.0	34.6	0.0	33.3
Total non-operating income (loss)	(4.8)	28.7	(20.0)	22.3
Income from continuing operations before taxes	25.3	57.4	100.0	119.6
Income tax expense	7.5	14.5	29.8	33.5
Income from continuing operations	17.8	42.9	70.2	86.1
Income from discontinued operations, net of tax	0.0	1.2	0.0	76.5
Gain on disposal of discontinued operations, net of tax	0.0	185.4	0.0	694.6
Net income	17.8	229.5	70.2	857.2
Net income attributable to non-controlling interests in consolidated Funds	0.0	0.0	0.0	68.0
Net income attributable to controlling interests	$ 17.8	$ 229.5	$ 70.2	$ 789.2
Earnings per share (basic) attributable to controlling interests (in dollars per share)	$ 0.43	$ 2.88	$ 1.66	$ 9.93
Earnings per share (diluted) attributable to controlling interests (in dollars per share)	0.42	2.76	1.62	9.53
Continuing operations earnings per share (basic) attributable to controlling interests (in dollars per share)	0.43	0.54	1.66	1.08
Continuing operations earnings per share (diluted) attributable to controlling interests (in dollars per share)	$ 0.42	$ 0.52	$ 1.62	$ 1.04
Weighted average common stock outstanding (in shares)	41,431,729	79,606,810	42,266,420	79,427,030
Weighted average diluted common stock outstanding (in shares)	42,353,442	83,244,575	43,390,502	82,831,508
Management fees
Revenue:
Revenue	$ 85.7	$ 111.4	$ 281.4	$ 326.8
Performance fees
Revenue:
Revenue	$ 1.1	$ 3.4	$ 13.1	$ 28.4