Segment Reporting - Reconciliation of Income Before Provision for Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Income (loss) before provision for income taxes	$ 152.2	$ 358.6	$ 241.8	$ 1,401.0
Adjustments:
Unrealized principal investment (income) loss	17.7	(422.3)	99.2	(1,846.7)
Net income attributable to non-controlling interests in consolidated entities	29.7	1.6	90.0	28.3
Realized performance revenues, net of related compensation	(64.4)	134.6	(163.9)	605.0
Total Reportable Segments
Adjustments:
Net unrealized performance and fee related performance revenues	138.9	152.2	471.6	(385.2)
Distributable Earnings	367.4	644.4	1,027.8	1,476.0
Realized performance revenues, net of related compensation	150.0	391.1		780.0
Realized principal investment income	23.4	56.7
Net interest	10.7	16.0
Fee Related Earnings	204.7	212.6	605.4	632.3
Reconciling Items
Adjustments:
Equity-based compensation	67.3	56.0	195.1	145.0
Acquisition or disposition-related charges (credits) and amortization of intangibles and impairment	50.6	42.4	113.0	124.9
Tax (expense) benefit associated with certain foreign performance revenues	(0.2)	3.8	(0.8)	3.0
Net income attributable to non-controlling interests in consolidated entities	(29.7)	(1.6)	(90.0)	(28.3)
Other adjustments including severance	5.4	3.1	11.6	5.4
Unrealized principal investment income (loss) \| Reconciling Items
Adjustments:
Unrealized principal investment (income) loss	(17.1)	29.9	(18.5)	33.3
Unrealized principal investment income (loss) \| Reconciling Items \| Fortitude Group Holdings, LLC
Adjustments:
Principal investment loss from dilution of indirect investment in Fortitude	$ 0.0	$ 0.0	$ 104.0	$ 176.9

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