Segment Reporting - Reconciliation of Income Before Provision for Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Income (loss) before provision for income taxes	$ 218.8	$ (70.0)	$ 339.5	$ 89.6
Adjustments:
Unrealized principal investment (income) loss	(286.3)	254.0	(202.4)	81.5
Net income attributable to non-controlling interests in consolidated entities	1.1	35.7	34.3	60.3
Distributable Earnings	218.8	(70.0)	339.5	89.6
Realized performance revenues, net of related compensation	54.0	(154.6)	(30.2)	(99.5)
Consolidated VIEs, assets	22,284.1		22,284.1		$ 21,176.0
Total Reportable Segments
Adjustments:
Net unrealized performance and fee related performance revenues	(15.2)	314.3	178.0	332.7
Distributable Earnings	343.2	388.8	774.5	660.4
Realized performance revenues, net of related compensation	55.7	175.1
Realized principal investment income	26.6	22.1
Net interest	12.1	15.7
Fee Related Earnings	273.0	207.3	539.3	400.7
Total Reportable Segments | Global Segments
Adjustments:
Distributable Earnings	343.2	388.8	774.5	660.4
Realized performance revenues, net of related compensation	55.7	175.1	197.7	244.6
Realized principal investment income	26.6	22.1	60.3	45.9
Net interest	12.1	15.7	22.8	30.8
Fee Related Earnings	273.0	207.3	539.3	400.7
Consolidated VIEs, assets	13,147.2	13,838.7	13,147.2	13,838.7
Total Reportable Segments | Global Private Equity
Adjustments:
Distributable Earnings	199.1	320.7	512.2	503.5
Realized performance revenues, net of related compensation	48.3	169.1	187.8	221.8
Realized principal investment income	6.8	13.2	25.7	25.1
Net interest	7.6	11.3	14.0	22.5
Fee Related Earnings	151.6	149.7	312.7	279.1
Consolidated VIEs, assets	7,137.3	8,813.9	7,137.3	8,813.9
Total Reportable Segments | Global Credit
Adjustments:
Distributable Earnings	99.8	55.4	181.9	124.3
Realized performance revenues, net of related compensation	2.6	2.9	2.9	17.9
Realized principal investment income	19.2	8.2	33.0	17.2
Net interest	3.3	3.2	6.5	6.2
Fee Related Earnings	81.3	47.5	152.5	95.4
Consolidated VIEs, assets	3,765.8	3,074.9	3,765.8	3,074.9
Total Reportable Segments | Global Investment Solutions
Adjustments:
Distributable Earnings	44.3	12.7	80.4	32.6
Realized performance revenues, net of related compensation	4.8	3.1	7.0	4.9
Realized principal investment income	0.6	0.7	1.6	3.6
Net interest	1.2	1.2	2.3	2.1
Fee Related Earnings	40.1	10.1	74.1	26.2
Consolidated VIEs, assets	2,244.1	1,949.9	2,244.1	1,949.9
Reconciling Items
Adjustments:
Equity-based compensation	127.4	70.7	238.4	127.8
Acquisition or disposition-related charges, including amortization of intangibles and impairment	33.3	33.7	66.1	62.4
Tax expense associated with certain foreign performance revenues	(0.2)	(0.1)	(1.2)	(0.6)
Net income attributable to non-controlling interests in consolidated entities	(1.1)	(35.7)	(34.3)	(60.3)
Other adjustments	28.3	2.3	40.5	6.2
Distributable Earnings	(120.4)	(495.2)	(449.4)	(635.5)
Consolidated VIEs, assets	(569.2)		(569.2)
Reconciling Items | Fortitude Group Holdings, LLC
Adjustments:
Principal investment loss from dilution of indirect investment in Fortitude	0.0	104.0	0.0	104.0
Unrealized principal investment income (loss) | Reconciling Items
Adjustments:
Unrealized principal investment (income) loss	(48.1)	(30.4)	(52.5)	(1.4)
Unrealized principal investment income (loss) | Reconciling Items | Fortitude Group Holdings, LLC
Adjustments:
Principal investment loss from dilution of indirect investment in Fortitude	$ 0.0	$ 104.0	$ 0.0	$ 104.0