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Schedule III (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 Policy Acquisition Costs | $ 2,065 | $ 2,117 |
Liability for Unpaid Losses and Loss Adjustment Expenses, Future Policy Benefits | 70,485 | 71,860 |
Unearned Premiums | 17,232 | 17,375 |
Policy and Contract Claims | 31 | 23 |
Premiums | 23,537 | 25,564 | $ 26,765
Net Investment Income | 4,255 | 3,446 | 2,370
Losses and Loss Expenses Incurred | 14,567 | 15,393 | 15,461
Amortization of Deferred Policy Acquisition Costs | 3,425 | 3,771 | 3,545
Other Operating Expenses | 5,529 | 5,399 | 6,159
Net Premiums Written | 23,902 | 27,206 | 26,760
Net Investment Income | 4,255 | 3,446 | 2,370
Reportable Segments |  |  |
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] |  |  |
Net Investment Income | 3,060 | 3,022 | 2,382
All Other |  |  |
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] |  |  |
Deferred Policy Acquisition Costs | (95) | (61) |
Liability for Unpaid Losses and Loss Adjustment Expenses, Future Policy Benefits | 6,759 | 6,409 |
Unearned Premiums | 183 | 276 |
Policy and Contract Claims | 31 | 23 |
Premiums | 80 | 473 | 1,425
Net Investment Income | 1,195 | 424 | (12)
Losses and Loss Expenses Incurred | 529 | 618 | 54
Amortization of Deferred Policy Acquisition Costs | 12 | 148 | 12
Other Operating Expenses | 1,440 | 1,055 | 1,807
Net Premiums Written | 0 | 487 | 1,248
North America Commercial | Reportable Segments |  |  |
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] |  |  |
Deferred Policy Acquisition Costs | 379 | 317 |
Liability for Unpaid Losses and Loss Adjustment Expenses, Future Policy Benefits | 39,619 | 39,758 |
Unearned Premiums | 5,936 | 5,660 |
Policy and Contract Claims | 0 | 0 |
Premiums | 8,172 | 10,233 | 10,444
Losses and Loss Expenses Incurred | 5,713 | 6,323 | 7,218
Amortization of Deferred Policy Acquisition Costs | 824 | 1,371 | 1,381
Other Operating Expenses | 1,087 | 1,184 | 1,101
Net Premiums Written | 8,452 | 11,432 | 10,899
International Commercial | Reportable Segments |  |  |
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] |  |  |
Deferred Policy Acquisition Costs | 718 | 691 |
Liability for Unpaid Losses and Loss Adjustment Expenses, Future Policy Benefits | 16,208 | 17,354 |
Unearned Premiums | 5,773 | 5,789 |
Policy and Contract Claims | 0 | 0 |
Premiums | 8,145 | 7,964 | 7,701
Losses and Loss Expenses Incurred | 4,463 | 4,641 | 4,301
Amortization of Deferred Policy Acquisition Costs | 1,018 | 943 | 938
Other Operating Expenses | 1,437 | 1,378 | 1,323
Net Premiums Written | 8,364 | 8,168 | 7,877
Global Personal | Reportable Segments |  |  |
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] |  |  |
Deferred Policy Acquisition Costs | 1,063 | 1,170 |
Liability for Unpaid Losses and Loss Adjustment Expenses, Future Policy Benefits | 7,899 | 8,339 |
Unearned Premiums | 5,340 | 5,650 |
Policy and Contract Claims | 0 | 0 |
Premiums | 7,140 | 6,894 | 7,195
Losses and Loss Expenses Incurred | 3,862 | 3,811 | 3,888
Amortization of Deferred Policy Acquisition Costs | 1,571 | 1,309 | 1,214
Other Operating Expenses | 1,565 | 1,782 | 1,928
Net Premiums Written | $ 7,086 | $ 7,119 | $ 6,736

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