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Fair Value Measurements - Fair Value Option on Consolidated VIEs (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2021
Fair Value Option, Quantitative Disclosures |  |
Change in fair value pre-tax loss - instrument specific credit risk | $ (5.6) |
Other loans of consolidated VIEs |  |
Fair Value Option, Quantitative Disclosures |  |
Fair value | 163.2 |
Aggregate contractual principal | 167.1 |
Change in fair value pre-tax gain (loss) | (5.6) |
Interest income | $ 8.1 |
Real Estate Ventures |  |
Fair Value Option, Quantitative Disclosures |  |
Change in fair value pre-tax gain (loss) |  | $ 12.5

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