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v3.25.3

SUBSEQUENT EVENTS (Details) - USD ($) $ in Millions | Oct. 26, 2025 | Oct. 01, 2025 | Sep. 30, 2025 | Dec. 31, 2024
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Subsequent Event [Line Items] |  |  |  |
Funds held under reinsurance treaties |  |  | $ 16 | $ 27
Reinsurance Contract [Axis]: Adverse Development Cover Reinsurance Agreements |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Funds held under reinsurance treaties |  |  | $ 5,400 |
Subsequent Event | First Layer | Reinsurance Contract [Axis]: Adverse Development Cover Reinsurance Agreements |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Funds held under reinsurance agreement, excess of liability |  | $ 700 |  |
In-the-money reserves, consideration to be transferred upon closing |  | 1,300 |  |
Co-participation per layer |  | 100 |  |
Subsequent Event | Second Layer | Reinsurance Contract [Axis]: Adverse Development Cover Reinsurance Agreements |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Funds held under reinsurance agreement, excess of liability |  | 500 |  |
In-the-money reserves, consideration to be transferred upon closing |  | 122 |  |
Co-participation per layer |  | $ 100 |  |
Subsequent Event | American International Group, Inc. |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Percentage of actual premiums written threshold | 15.00% |  |  |
Additional monthly consideration | $ 10 |  |  |
Additional monthly consideration, term | 9 months |  |  |
Subsequent Event | United States, United Kingdom, And Asia Pacific | American International Group, Inc. |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Aggregate purchase price | $ 252 |  |  |
Master transaction agreement payment | $ 30 |  |  |
Aggregate renewed premiums | 80.00% |  |  |
Aggregate purchase price, not to exceed | $ 70 |  |  |
Subsequent Event | European Union | American International Group, Inc. |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Aggregate purchase price | $ 49 |  |  |

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- Definition Renewal Right Agreement, Gross Written Premium Paid And Payable, Aggregate Renewed Premiums, Threshold + References No definition available. + Details
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- Definition Amount per policy of risk undertaken originally by insurer that is not ceded to reinsurer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479838/944-20-50-3 + Details
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