Segment Reporting - Reconciliation of Income Before Provision for Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Income (loss) before provision for income taxes	$ 358.6	$ 701.3	$ 1,401.0	$ 3,118.3
Adjustments:
Unrealized principal investment (income) loss	(422.3)	(1,134.9)	(1,846.7)	(5,318.5)
Equity-based compensation	54.2	42.4	139.3	122.0
Net income attributable to non-controlling interests in consolidated entities	1.6	14.6	28.3	57.7
Right-of-use asset impairment			26.8
Realized performance revenues, net of related compensation	134.6	479.3	605.0	2,485.5
Total Reportable Segments
Adjustments:
Net unrealized performance and fee related performance revenues	152.2	44.8	(385.2)	(1,645.6)
Distributable Earnings	644.4	730.6	1,476.0	1,340.9
Realized performance revenues, net of related compensation	391.1	533.5	780.0	846.9
Realized principal investment income	56.7	71.3	126.8	139.1
Net interest	16.0	25.6	63.1	68.7
Fee Related Earnings	212.6	151.4	632.3	423.6
Reconciling Items
Adjustments:
Equity-based compensation	56.0	44.3	145.0	129.5
Acquisition or disposition-related charges (credits) and amortization of intangibles and impairment	42.4	24.4	124.9	54.7
Tax expense associated with certain foreign performance revenues	3.8	(2.4)	3.0	(11.8)
Net income attributable to non-controlling interests in consolidated entities	(1.6)	(14.6)	(28.3)	(57.7)
Right-of-use asset impairment	0.0	0.0	0.0	26.8
Other adjustments including severance	3.1	3.2	5.4	7.2
Unrealized principal investment income (loss) \| Reconciling Items
Adjustments:
Unrealized principal investment (income) loss	29.9	(70.4)	33.3	(280.5)
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	$ 176.9	$ 0.0

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