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Schedule III - Supplementary Insurance Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] |  |  |  |
Deferred Acquisition Costs |  | $ 1,717 | $ 1,734 | $ 1,531
Reserves for Losses and Loss Adjustment Expenses |  | 33,547 | 29,369 | 22,752
Unearned Premiums |  | 10,100 | 10,218 | 8,808
Net Premiums Earned |  | 17,065 | 15,100 | 12,440
Net Losses and Loss Adjustment Expenses Incurred |  | 9,370 | 8,342 | 6,246
Amortization of Deferred Acquisition Costs |  | 3,153 | 2,651 | 2,312
Other Operating Expenses | [1] | 1,826 | 1,472 | 1,301
Net Premiums Written |  | 16,476 | 15,732 | 13,468
Operating segments | Insurance |  |  |  |
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] |  |  |  |
Deferred Acquisition Costs |  | 788 | 696 | 566
Reserves for Losses and Loss Adjustment Expenses |  | 17,527 | 16,277 | 12,250
Unearned Premiums |  | 5,199 | 4,857 | 3,917
Net Premiums Earned |  | 7,771 | 6,627 | 5,446
Net Losses and Loss Adjustment Expenses Incurred |  | 4,764 | 4,070 | 3,122
Amortization of Deferred Acquisition Costs |  | 1,496 | 1,217 | 1,055
Other Operating Expenses | [1] | 1,172 | 995 | 819
Net Premiums Written |  | 7,798 | 6,874 | 5,862
Operating segments | Reinsurance |  |  |  |
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] |  |  |  |
Deferred Acquisition Costs |  | 872 | 981 | 901
Reserves for Losses and Loss Adjustment Expenses |  | 15,523 | 12,567 | 9,924
Unearned Premiums |  | 4,545 | 4,891 | 4,254
Net Premiums Earned |  | 8,122 | 7,242 | 5,836
Net Losses and Loss Adjustment Expenses Incurred |  | 4,610 | 4,327 | 3,227
Amortization of Deferred Acquisition Costs |  | 1,644 | 1,432 | 1,240
Other Operating Expenses | [1] | 469 | 270 | 288
Net Premiums Written |  | 7,618 | 7,746 | 6,554
Operating segments | Mortgage |  |  |  |
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] |  |  |  |
Deferred Acquisition Costs |  | 57 | 57 | 64
Reserves for Losses and Loss Adjustment Expenses |  | 497 | 525 | 578
Unearned Premiums |  | 356 | 470 | 637
Net Premiums Earned |  | 1,172 | 1,231 | 1,158
Net Losses and Loss Adjustment Expenses Incurred |  | (4) | (55) | (103)
Amortization of Deferred Acquisition Costs |  | 13 | 2 | 17
Other Operating Expenses | [1] | 185 | 207 | 194
Net Premiums Written |  | $ 1,060 | $ 1,112 | $ 1,052
[1] | Certain other operating expenses relate to the Company’s corporate items. Such amounts are not reflected in the table above. See note 4, “Segment Information,” to our consolidated financial statements in Item 8 for information

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