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Investment Securities - Fair Value of Hedge Funds Subject to Restrictions on Redemption Frequency (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Private equity funds |  |
Investment securities |  |
Fair Value | $ 249.5 | $ 248.6
Unfunded Commitments | 83.7 | 57.7
Hedge funds |  |
Investment securities |  |
Fair Value | 111.2 | 64.3
Unfunded Commitments | 0.0 | 0.0
Aerospace/Defense/Government | Private equity funds |  |
Investment securities |  |
Fair Value | 152.4 | 157.2
Unfunded Commitments | 49.3 | 17.4
Financial services | Private equity funds |  |
Investment securities |  |
Fair Value | 93.4 | 87.5
Unfunded Commitments | 32.0 | 37.8
Real estate | Private equity funds |  |
Investment securities |  |
Fair Value | 3.7 | 3.9
Unfunded Commitments | 2.4 | 2.5
Long/short equity financials and business services | Hedge funds |  |
Investment securities |  |
Fair Value | 59.2 | 54.4
Unfunded Commitments | 0.0 | 0.0
Long/short all cap global | Hedge funds |  |
Investment securities |  |
Fair Value | 52.0 | 0.0
Unfunded Commitments | 0.0 | 0.0
European small/mid cap | Hedge funds |  |
Investment securities |  |
Fair Value | 0.0 | 9.9
Unfunded Commitments | 0.0 | 0.0
Private equity funds and hedge funds |  |
Investment securities |  |
Fair Value | 360.7 | 312.9
Unfunded Commitments | $ 83.7 | $ 57.7

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