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Commitments, Guarantees and Contingent Liabilities - North Carolina and New Jersey Property-Liability (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2025 | Dec. 31, 2024
New Jersey Unsatisfied Claim and Judgment Fund |  |
Loss Contingencies |  |
Insurance fund balance |  | $ 74
North Carolina Joint Underwriters Association |  |
Loss Contingencies |  |
Plan surplus receivable | $ 14 |
Funds surplus in member's equity | 87 |
North Carolina Insurance Underwriting Association |  |
Loss Contingencies |  |
Funds surplus in member's equity | 1,600 |
Maximum possible assessment | $ 1,000 |
Percentage of surcharge on property insurance policy statewide to be remitted to the plan | 10.00% |

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