Investments - Schedule of Investments (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Investments [Abstract]
Accrued performance allocations	$ 6,532.0	$ 4,968.6
Principal equity method investments, excluding performance allocations	1,936.7	1,810.8
Principal investments in CLOs and other	575.8	601.5
Total	$ 9,044.5	$ 7,380.9

Sum of the carrying amounts as of the balance sheet date of all investments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(h))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant