Supplemental Financial Information - Financial Position (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Assets
Cash and cash equivalents	$ 1,276.5	$ 1,440.3	$ 1,010.1
Cash and cash equivalents held at Consolidated Funds	426.0	346.0	228.8
Restricted cash	1.4	1.8	16.8
Investments	9,473.2	9,955.3
Investments of Consolidated Funds	7,458.6	7,253.1
Due from affiliates and other receivables, net	624.1	691.6
Due from affiliates and other receivables of Consolidated Funds, net	204.1	141.0
Fixed assets, net	162.8	161.5
Lease right-of-use assets, net	349.3	332.2
Deposits and other	88.5	70.6
Intangible assets, net	732.8	766.1
Deferred tax assets	52.2	16.5
Total assets	20,849.5	21,176.0
Liabilities and equity
Debt obligations	2,259.0	2,281.0
Loans payable of Consolidated Funds	6,535.1	6,486.5
Accounts payable, accrued expenses and other liabilities	375.2	333.8
Accrued compensation and benefits	4,173.9	4,922.2
Due to affiliates	203.6	275.9
Deferred revenue	391.1	140.3
Deferred tax liabilities	26.2	45.3
Other liabilities of Consolidated Funds	598.5	374.4
Lease liabilities	502.9	488.1
Accrued giveback obligations	44.0	44.0
Total liabilities	15,109.5	15,391.5
Common stock	3.6	3.6
Additional paid-in capital	3,513.9	3,403.0
Retained earnings	1,868.2	2,082.1
Accumulated other comprehensive loss	(315.0)	(297.3)
Non-controlling interests in consolidated entities	669.3	593.1
Total equity	5,740.0	5,784.5	6,811.5	$ 6,821.3
Total liabilities and equity	20,849.5	21,176.0
Performance allocations	5,567.6	6,169.9
Consolidated Operating Entities
Assets
Cash and cash equivalents	1,276.5		1,010.1
Cash and cash equivalents held at Consolidated Funds	426.0		228.8
Restricted cash	1.4		$ 16.8
Consolidated Entities and Consolidated Funds \| Consolidated Operating Entities
Assets
Cash and cash equivalents	1,276.5	1,440.3
Cash and cash equivalents held at Consolidated Funds	0.0	0.0
Restricted cash	1.4	1.8
Investments	9,684.7	10,104.5
Investments of Consolidated Funds	0.0	0.0
Due from affiliates and other receivables, net	934.5	1,009.2
Due from affiliates and other receivables of Consolidated Funds, net	0.0	0.0
Fixed assets, net	162.8	161.5
Lease right-of-use assets, net	349.3	332.2
Deposits and other	84.2	66.0
Intangible assets, net	732.8	766.1
Deferred tax assets	52.2	16.5
Total assets	13,278.4	13,898.1
Liabilities and equity
Debt obligations	2,259.0	2,281.0
Loans payable of Consolidated Funds	0.0	0.0
Accounts payable, accrued expenses and other liabilities	375.2	333.8
Accrued compensation and benefits	4,173.9	4,922.2
Due to affiliates	197.2	269.6
Deferred revenue	391.1	140.3
Deferred tax liabilities	26.2	45.3
Other liabilities of Consolidated Funds	0.0	0.0
Lease liabilities	502.9	488.1
Accrued giveback obligations	44.0	44.0
Total liabilities	7,969.5	8,524.3
Common stock	3.6	3.6
Additional paid-in capital	3,513.9	3,403.0
Retained earnings	1,868.2	2,082.1
Accumulated other comprehensive loss	(315.9)	(292.7)
Non-controlling interests in consolidated entities	239.1	177.8
Total equity	5,308.9	5,373.8
Total liabilities and equity	13,278.4	13,898.1
Consolidated Entities and Consolidated Funds \| Consolidated Funds
Assets
Cash and cash equivalents	0.0	0.0
Cash and cash equivalents held at Consolidated Funds	426.0	346.0
Restricted cash	0.0	0.0
Investments	0.0	0.0
Investments of Consolidated Funds	7,520.5	7,313.9
Due from affiliates and other receivables, net	0.0	0.0
Due from affiliates and other receivables of Consolidated Funds, net	204.1	141.0
Fixed assets, net	0.0	0.0
Lease right-of-use assets, net	0.0	0.0
Deposits and other	4.3	4.6
Intangible assets, net	0.0	0.0
Deferred tax assets	0.0	0.0
Total assets	8,154.9	7,805.5
Liabilities and equity
Debt obligations	0.0	0.0
Loans payable of Consolidated Funds	6,840.0	6,796.4
Accounts payable, accrued expenses and other liabilities	0.0	0.0
Accrued compensation and benefits	0.0	0.0
Due to affiliates	6.4	6.3
Deferred revenue	0.0	0.0
Deferred tax liabilities	0.0	0.0
Other liabilities of Consolidated Funds	598.5	374.4
Lease liabilities	0.0	0.0
Accrued giveback obligations	0.0	0.0
Total liabilities	7,444.9	7,177.1
Common stock	0.0	0.0
Additional paid-in capital	291.4	223.8
Retained earnings	0.0	0.0
Accumulated other comprehensive loss	(11.6)	(10.7)
Non-controlling interests in consolidated entities	430.2	415.3
Total equity	710.0	628.4
Total liabilities and equity	8,154.9	7,805.5
Eliminations
Assets
Cash and cash equivalents	0.0	0.0
Cash and cash equivalents held at Consolidated Funds	0.0	0.0
Restricted cash	0.0	0.0
Investments	(211.5)	(149.2)
Investments of Consolidated Funds	(61.9)	(60.8)
Due from affiliates and other receivables, net	(310.4)	(317.6)
Due from affiliates and other receivables of Consolidated Funds, net	0.0	0.0
Fixed assets, net	0.0	0.0
Lease right-of-use assets, net	0.0	0.0
Deposits and other	0.0	0.0
Intangible assets, net	0.0	0.0
Deferred tax assets	0.0	0.0
Total assets	(583.8)	(527.6)
Liabilities and equity
Debt obligations	0.0	0.0
Loans payable of Consolidated Funds	(304.9)	(309.9)
Accounts payable, accrued expenses and other liabilities	0.0	0.0
Accrued compensation and benefits	0.0	0.0
Due to affiliates	0.0	0.0
Deferred revenue	0.0	0.0
Deferred tax liabilities	0.0	0.0
Other liabilities of Consolidated Funds	0.0	0.0
Lease liabilities	0.0	0.0
Accrued giveback obligations	0.0	0.0
Total liabilities	(304.9)	(309.9)
Common stock	0.0	0.0
Additional paid-in capital	(291.4)	(223.8)
Retained earnings	0.0	0.0
Accumulated other comprehensive loss	12.5	6.1
Non-controlling interests in consolidated entities	0.0	0.0
Total equity	(278.9)	(217.7)
Total liabilities and equity	$ (583.8)	$ (527.6)

Amount of realized performance fees, if the fund were liquidated at the reporting date fair value, that would be given back to the fund investors at the end of the fund's life if the fund fair value does not recover sufficiently to pass through the hurdle rate that allows for the recognition of performance fees.

No definition available.