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SCHEDULE III — SUPPLEMENTARY INSURANCE INFORMATION (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] |  |  |
Deferred Acquisition Costs | $ 1,461 | $ 1,247 | $ 962
Reserve for Losses and Loss Adjustment Expenses | 29,889 | 24,604 | 22,065
Unearned Premium Reserves | 7,324 | 6,622 | 5,147
Premiums Earned | 15,187 | 13,443 | 11,787
Net Investment Income | 1,954 | 1,434 | 830
Incurred Loss and Loss Adjustment Expenses | 11,305 | 8,427 | 8,100
Amortization of Deferred Acquisition Costs | 3,300 | 2,952 | 2,528
Other Operating Expenses | 938 | 846 | 682
Net Written Premium | 15,814 | 14,730 | 12,344
Reinsurance |  |  |
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] |  |  |
Deferred Acquisition Costs | 1,185 | 967 | 708
Reserve for Losses and Loss Adjustment Expenses | 19,708 | 17,327 | 15,756
Unearned Premium Reserves | 4,621 | 4,009 | 2,881
Premiums Earned | 11,412 | 9,799 | 8,596
Net Investment Income | 1,255 | 984 | 574
Incurred Loss and Loss Adjustment Expenses | 7,103 | 5,690 | 5,962
Amortization of Deferred Acquisition Costs | 2,837 | 2,520 | 2,116
Other Operating Expenses | 290 | 254 | 216
Net Written Premium | 11,969 | 10,802 | 8,917
Insurance |  |  |
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] |  |  |
Deferred Acquisition Costs | 270 | 271 | 243
Reserve for Losses and Loss Adjustment Expenses | 8,841 | 6,338 | 5,438
Unearned Premium Reserves | 2,635 | 2,504 | 2,153
Premiums Earned | 3,579 | 3,420 | 2,998
Net Investment Income | 605 | 391 | 219
Incurred Loss and Loss Adjustment Expenses | 3,622 | 2,471 | 2,040
Amortization of Deferred Acquisition Costs | 439 | 410 | 399
Other Operating Expenses | 615 | 556 | 438
Net Written Premium | 3,678 | 3,704 | 3,223
Other |  |  |
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] |  |  |
Deferred Acquisition Costs | 6 | 9 | 11
Reserve for Losses and Loss Adjustment Expenses | 1,340 | 939 | 871
Unearned Premium Reserves | 68 | 109 | 113
Premiums Earned | 197 | 225 | 194
Net Investment Income | 94 | 59 | 37
Incurred Loss and Loss Adjustment Expenses | 580 | 266 | 98
Amortization of Deferred Acquisition Costs | 24 | 22 | 14
Other Operating Expenses | 33 | 35 | 28
Net Written Premium | $ 167 | $ 225 | $ 204

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