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v3.25.3

Guarantees and Contingent Liabilities (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2025 USD ($) | Sep. 30, 2025 USD ($) claim | Feb. 11, 2025 USD ($)
California FAIR Plan Association |  |  |
Guarantor Obligations [Line Items] |  |  |
Maximum possible assessment |  |  | $ 1,000,000,000
Insurance recoupment (as a percent) |  |  | 50.00%
Personal Lines | California FAIR Plan Association |  |  |
Guarantor Obligations [Line Items] |  |  |
Maximum possible assessment |  |  | $ 1,000,000,000
Market share (as a percent) |  |  | 4.60%
Maximum possible assessment paid | $ 45,000,000 |  |
Commercial Lines | California FAIR Plan Association |  |  |
Guarantor Obligations [Line Items] |  |  |
Market share (as a percent) |  |  | 2.00%
Holland Hewitt v. Allstate Life Insurance Company |  |  |
Guarantor Obligations [Line Items] |  |  |
Number of putative class actions | claim |  | 2 |
Minimum |  |  |
Guarantor Obligations [Line Items] |  |  |
Loss contingencies, reasonably possible pretax loss exposure in excess of the amount accrued |  | $ 0 |
Maximum |  |  |
Guarantor Obligations [Line Items] |  |  |
Loss contingencies, reasonably possible pretax loss exposure in excess of the amount accrued |  | $ 52,000,000 |

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