Related Party Transactions (Details) - Related Party - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Related party transactions
Total related party revenues	$ 162.0	$ 129.2	$ 87.5
Investment advisory fee
Related party transactions
Total amounts due for investment advisory fee receivables from related parties	60.5	42.7
Investment advisory fee \| Consolidated Entity Excluding Consolidated Funds
Related party transactions
Total amounts due for investment advisory fee receivables from related parties	60.5	42.7
Management fees from unconsolidated Funds \| Consolidated Entity Excluding Consolidated Funds
Related party transactions
Total related party revenues	147.8	119.9	86.5
Performance fees from unconsolidated Funds \| Consolidated Entity Excluding Consolidated Funds
Related party transactions
Total related party revenues	$ 14.2	$ 9.3	$ 1.0

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.

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+ Details

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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