Related Party Transactions - Schedule of Amounts Due from Affiliates and Other Receivables (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Related Party Transaction [Line Items]
Due from affiliates and other receivables, net	$ 769.1	$ 834.8
Affiliated Entity
Related Party Transaction [Line Items]
Due from affiliates and other receivables, net	769.1	834.8
Accrued incentive fees \| Affiliated Entity
Related Party Transaction [Line Items]
Due from affiliates and other receivables, net	58.9	53.6
Unbilled receivable for giveback obligations from current and former employees \| Affiliated Entity
Related Party Transaction [Line Items]
Due from affiliates and other receivables, net	34.6	24.2
Notes receivable and accrued interest from affiliates \| Affiliated Entity
Related Party Transaction [Line Items]
Due from affiliates and other receivables, net	49.5	34.0
Management fee receivable, net \| Affiliated Entity
Related Party Transaction [Line Items]
Due from affiliates and other receivables, net	215.2	246.0
Reimbursable expenses and other receivables from unconsolidated funds and affiliates, net \| Affiliated Entity
Related Party Transaction [Line Items]
Due from affiliates and other receivables, net	$ 410.9	$ 477.0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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+ Details