Investments - Investments in Consolidated Funds Narrative (Details) $ in Millions	12 Months Ended
Dec. 31, 2022 USD ($)
Schedule of Investments [Line Items]
Minimum percent of aggregate assets for individual investments with fair value	5.00%
Global Investment Solutions
Schedule of Investments [Line Items]
Unfunded commitments, purchase agreement	$ 61.0
Variable Interest Entity, Primary Beneficiary \| Equity securities
Schedule of Investments [Line Items]
Investments measured at net asset value	$ 377.4

Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 6A
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=SL6742756-110258

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 35
-Paragraph 54B
-URI https://asc.fasb.org/extlink&oid=126972413&loc=SL7495116-110257

Name:	us-gaap_AlternativeInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant