Segment Reporting - Reconciliation of Income Before Provision for Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Segment Reporting Information [Line Items]
Income (loss) before provision for income taxes	$ (179.0)	$ 171.0
Adjustments:
Unrealized principal investment (income) loss	616.7	(159.8)
Net (income) loss attributable to non-controlling interests in consolidated entities	(9.7)	28.6
(=) Distributable Earnings	(179.0)	171.0
Total Reportable Segments
Adjustments:
Net unrealized performance and fee related performance revenues	254.5	90.0
(=) Distributable Earnings	327.0	455.4
Fee Related Earnings	300.0	310.6
Total Reportable Segments \| Global Segments
Adjustments:
(=) Distributable Earnings	327.0	455.4
(-) Realized principal investment income	28.2	30.0
(+) Net interest	21.7	12.6
Fee Related Earnings	300.0	310.6
Reconciling Items
Adjustments:
Equity-based compensation	121.8	104.7
Acquisition or disposition-related charges, including amortization of intangibles and impairment	46.4	122.2
Tax (expense) benefit associated with certain foreign performance revenues	0.7	0.0
Net (income) loss attributable to non-controlling interests in consolidated entities	9.7	(28.6)
Other adjustments	4.6	13.1
(=) Distributable Earnings	(443.0)	(293.1)
Unrealized principal investment income (loss) \| Reconciling Items
Adjustments:
Unrealized principal investment (income) loss	68.3	(17.0)
Performance allocations
Adjustments:
Unrealized principal investment (income) loss	681.1	(222.9)
(-) Realized performance revenues, net of related compensation	(313.2)	51.5
Performance allocations \| Total Reportable Segments \| Global Segments
Adjustments:
(-) Realized performance revenues, net of related compensation	$ 20.5	$ 127.4

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