Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue:
Other revenue	$ 0.0	$ 1.3	$ 0.0	$ 2.6
Total revenue	95.5	133.3	207.7	243.0
Operating expenses:
Compensation and benefits	27.0	73.4	73.8	126.0
General and administrative expense	16.5	18.0	33.4	37.1
Depreciation and amortization	5.3	5.8	10.6	11.3
Amortization of acquired intangibles	0.0	0.0	0.0	0.0
Total operating expenses	48.8	97.2	117.8	174.4
Operating income	46.7	36.1	89.9	68.6
Non-operating income and (expense):
Investment income (loss)	(0.7)	4.7	(0.8)	7.3
Interest income	0.1	0.1	0.1	0.1
Interest expense	(4.8)	(6.3)	(11.3)	(12.5)
Loss on extinguishment of debt	0.0	0.0	(3.2)	0.0
Loss on sale of subsidiary	0.0	0.0	0.0	(1.3)
Total non-operating income (loss)	(5.4)	(1.5)	(15.2)	(6.4)
Income from continuing operations before taxes	41.3	34.6	74.7	62.2
Income tax expense	12.7	9.9	22.3	19.0
Income from continuing operations	28.6	24.7	52.4	43.2
Income from discontinued operations, net of tax	0.0	53.4	0.0	75.3
Gain on disposal of discontinued operations, net of tax	0.0	509.2	0.0	509.2
Net income	28.6	587.3	52.4	627.7
Net income attributable to non-controlling interests in consolidated Funds	0.0	54.6	0.0	68.0
Net income attributable to controlling interests	$ 28.6	$ 532.7	$ 52.4	$ 559.7
Earnings per share (basic) attributable to controlling interests (in dollars per share)	$ 0.69	$ 6.71	$ 1.23	$ 7.05
Earnings per share (diluted) attributable to controlling interests (in dollars per share)	0.67	6.42	1.19	6.77
Continuing operations earnings per share (basic) attributable to controlling interests (in dollars per share)	0.69	0.31	1.23	0.54
Continuing operations earnings per share (diluted) attributable to controlling interests (in dollars per share)	$ 0.67	$ 0.29	$ 1.19	$ 0.52
Weighted average common stock outstanding (in shares)	41,425,555	79,351,567	42,690,683	79,335,650
Weighted average diluted common stock outstanding (in shares)	42,518,125	82,926,124	43,915,806	82,623,485
Management fees
Revenue:
Revenue	$ 93.5	$ 111.6	$ 195.7	$ 215.4
Performance fees
Revenue:
Revenue	$ 2.0	$ 20.4	$ 12.0	$ 25.0