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Segment Information - Revenues from exited business (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Revenues from exited business: |  |  |
Change in fair value of funds withheld embedded derivative | $ (1,085.7) | $ 3,652.8 | $ 0.0
Net realized capital gains on funds withheld assets | 165.0 | 749.4 |
Amortization of reinsurance gain | 5.9 | 12.6 |
Other impacts of reinsured business | (12.7) |  |
Total revenues from exited business | (927.5) | 4,414.8 |
Operating Segments |  |  |
Revenues from exited business: |  |  |
Change in fair value of funds withheld embedded derivative | (1,085.7) | 3,652.8 |
Net realized capital gains on funds withheld assets | 165.0 | 749.4 |
Reconciling Items |  |  |
Revenues from exited business: |  |  |
Change in fair value of funds withheld embedded derivative | (228.0) | 767.1 |
Net realized capital gains on funds withheld assets | 34.6 | 157.4 |
Total revenues from exited business | $ (927.5) | $ 4,414.8 |

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