Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue:
Revenue	$ 196.4	$ 229.6	$ 609.8	$ 701.0
Total revenue	197.8	230.1	612.1	713.7
Operating expenses:
Total operating expenses	145.9	216.8	445.6	659.5
Operating income	51.9	13.3	166.5	54.2
Non-operating income and (expense):
Net consolidated Funds’ investment gains (losses)	7.0	2.8	25.2	62.8
Total non-operating income (loss)	(0.9)	(2.6)	2.9	46.1
Income from continuing operations before taxes	51.0	10.7	169.4	100.3
Income tax expense (benefit)	(32.0)	(43.4)	3.7	(11.1)
Income from continuing operations	83.0	54.1	165.7	111.4
Gain (loss) on disposal of discontinued operations, net of tax	0.0	0.1	0.0	0.1
Net income	83.0	54.2	165.7	111.5
Net income (loss) attributable to non-controlling interests in consolidated Funds	7.6	0.2	9.6	(1.9)
Net income attributable to controlling interests	$ 75.4	$ 54.0	$ 156.1	$ 113.4
Earnings per share (basic) attributable to controlling interests (in dollars per share)	$ 0.84	$ 0.51	$ 1.68	$ 1.05
Earnings per share (diluted) attributable to controlling interests (in dollars per share)	0.84	0.51	1.68	1.04
Continuing operations earnings per share (basic) attributable to controlling interests (in dollars per share)	0.84	0.51	1.68	1.05
Continuing operations earnings per share (diluted) attributable to controlling interests (in dollars per share)	$ 0.84	$ 0.51	$ 1.68	$ 1.04
Weighted average ordinary shares outstanding (in shares)	89,970,871	106,363,714	92,996,289	108,057,432
Weighted average diluted ordinary shares outstanding (in shares)	89,972,300	106,514,709	93,076,064	108,231,710
Investments in unconsolidated Funds
Revenue:
Other revenue	$ 1.4	$ 1.4	$ 4.3	$ 7.2
Operating expenses:
Compensation and benefits	108.0	180.2	332.8	552.8
General and administrative expense	31.7	31.0	95.3	90.3
Amortization of acquired intangibles	1.6	1.6	4.9	4.9
Depreciation and other amortization	4.4	3.7	12.2	10.6
Non-operating income and (expense):
Investment income	2.3	3.9	11.4	69.6
Interest income	0.4	0.9	1.8	2.0
Interest expense	(8.3)	(6.3)	(24.1)	(18.7)
Gain (loss) on disposal of discontinued operations, net of tax			0.0	0.1
Consolidated Funds
Revenue:
Total revenue	1.9	1.2	4.9	2.6
Operating expenses:
Total operating expenses	0.2	0.3	0.4	0.9
Non-operating income and (expense):
Net consolidated Funds’ investment gains (losses)	4.7	(1.1)	13.8	(6.8)
Net income (loss) attributable to non-controlling interests in consolidated Funds	7.6	0.2	9.6	(1.9)
Management fees
Revenue:
Revenue	196.4	229.6	609.8	701.0
Management fees | Investments in unconsolidated Funds
Revenue:
Revenue	196.4	229.6	609.8	701.0
Performance fees | Investments in unconsolidated Funds
Revenue:
Revenue	$ (1.9)	$ (2.1)	$ (6.9)	$ 2.9