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Segment Information - Pre-tax income (loss) from exited business (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Pre-tax income (loss) from exited business: |  |  |  |  |
Change in fair value of funds withheld embedded derivative |  | $ (265.9) | $ (776.8) | $ (455.3) | $ (346.9)
Net realized capital gains (losses) on funds withheld assets | [1] | (0.2) | 39.4 | 31.5 | 105.9
Reconciling items |  |  |  |  |
Pre-tax income (loss) from exited business: |  |  |  |  |
Change in fair value of funds withheld embedded derivative |  | (265.9) | (776.8) | (455.3) | (346.9)
Net realized capital gains (losses) on funds withheld assets |  | (0.2) | 39.4 | 31.5 | 105.9
Amortization of reinsurance gain (loss) |  | (18.3) | (46.4) | (65.1) | (474.0)
Other impacts of exited business |  | (34.3) | (25.3) | (177.2) | 99.6
Total pre-tax income (loss) from exited business |  | $ (318.7) | $ (809.1) | $ (666.1) | $ (615.4)
[1] | Includes realized and unrealized gains (losses). See Note 4, Investments, for further details.

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