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Related party transactions - Investments Managed by Related Parties (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Related Party Transaction [Line Items] |  |
Total investments | $ 5,118.7 | $ 5,705.5
Related Party |  |
Related Party Transaction [Line Items] |  |
Third Point Optimized Credit Portfolio | 618.7 | 595.8
Total investments | 735.2 | 712.3
Related Party | Third Point Enhanced LP |  |
Related Party Transaction [Line Items] |  |
Investments in related party investment funds, at fair value | 83.8 | 87.6
Related Party | Related Party Fund - Third Point Venture Offshore Fund I LP |  |
Related Party Transaction [Line Items] |  |
Investments in related party investment funds, at fair value | 26.4 | 24.0
Related Party | Related Party Fund - Third Point Venture Offshore Fund II LP |  |
Related Party Transaction [Line Items] |  |
Investments in related party investment funds, at fair value | $ 6.3 | $ 4.9

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