Segment Information - Pre-tax income (loss) from exited business (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
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| Pre-tax income (loss) from exited business: | ||||||
| Change in fair value of funds withheld embedded derivative | $ 20.3 | $ 232.9 | $ (189.4) | $ 429.9 | ||
| Net realized capital gains (losses) on funds withheld assets | [1] | 3.7 | 19.0 | 31.7 | 66.5 | |
| Reconciling items | ||||||
| Pre-tax income (loss) from exited business: | ||||||
| Change in fair value of funds withheld embedded derivative | 20.3 | 232.9 | (189.4) | 429.9 | ||
| Net realized capital gains (losses) on funds withheld assets | 3.7 | 19.0 | 31.7 | 66.5 | ||
| Amortization of reinsurance gain (loss) | (20.4) | (417.5) | (46.8) | (427.6) | ||
| Other impacts of exited business | (36.7) | 161.7 | (142.9) | 124.9 | ||
| Total pre-tax income (loss) from exited business | $ (33.1) | $ (3.9) | $ (347.4) | $ 193.7 | ||
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