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Segment Information - Schedule of Continuing Operations by Operating Segment (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Segment Reporting Information [Line Items] |  |  |  |
Net Premiums Earned | $ 5,877 | $ 5,748 | $ 11,647 | $ 11,619
Loss and Loss Adjustment Expenses Incurred | 3,493 | 3,467 | 7,287 | 6,980
Amortization of DAC | 847 | 842 | 1,672 | 1,680
General Operating Expense | 1,162 | 1,610 | 2,277 | 2,848
Net Investment Income | 1,466 | 990 | 2,571 | 1,969
Income from continuing operations before income tax expense | 1,544 | 617 | 2,504 | 1,675
Interest expense | 100 | 125 | 192 | 241
Changes in the fair values of equity securities, AIG's investment in Corebridge and gain on sale of shares | 464 | 59 | 681 | 147
Other income (expense) - net |  | 15 |  | 16
Gain (loss) on extinguishment of debt | 5 | (1) | 5 | (1)
Total net realized losses | (258) | (180) | (361) | (267)
Net realized gains (losses), net investment income | 0 | (1) | (2) | 6
Net realized gains (losses), reconciliation to income (loss) from continuing operations before income tax expense | (191) | (186) | (257) | (241)
Net gain on divestitures and other | 50 | 102 | 53 | 102
Non-operating litigation reserves and settlements, reconciliation to income (loss) from continuing operations before income tax expense | 2 |  | 13 |
(Unfavorable) favorable prior year development and related amortization changes ceded under retroactive reinsurance agreements | (53) | 62 | (62) | 60
Net loss reserve discount charge | (12) | (26) | (29) | (102)
Net results of businesses in run-off, net investment income | 8 | 5 | 13 | 8
Net results of businesses in run-off, net investment income, reconciliation to income (loss) from continuing operations before income tax expense | 2 | 5 | 7 | 12
Non-operating pension expenses | (5) |  | (10) |
Integration and transaction costs associated with acquiring or divesting businesses | (1) | (18) | (6) | (15)
Restructuring and other costs | $ (78) | $ (426) | $ (154) | $ (493)
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] | General Operating Expense | General Operating Expense | General Operating Expense | General Operating Expense
Non-recurring costs related to regulatory or accounting changes | $ (3) | $ (7) | $ (7) | $ (11)
Fortitude Re funds withheld assets |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Investment Income | 39 | 33 | 79 | 72
Total net realized losses | (52) | (1) | (54) | (20)
Fortitude Re funds withheld embedded derivative |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net realized losses | (14) | 8 | (55) | (1)
Total |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Investment Income | 955 | 879 | 1,800 | 1,720
Income from continuing operations before income tax expense | 1,391 | 1,013 | 2,300 | 2,166
Reportable Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Premiums Written | 6,880 | 6,933 | 11,406 | 11,445
Net Premiums Earned | 5,878 | 5,749 | 11,647 | 11,535
Loss and Loss Adjustment Expenses Incurred | 3,428 | 3,508 | 7,194 | 6,861
Amortization of DAC | 846 | 841 | 1,671 | 1,669
Other Acquisition Cost | 201 | 258 | 433 | 533
General Operating Expense | 777 | 712 | 1,480 | 1,446
Underwriting Income (Loss) | 626 | 430 | 869 | 1,026
Net Investment Income | 871 | 746 | 1,607 | 1,508
Income from continuing operations before income tax expense | 1,497 | 1,176 | 2,476 | 2,534
Interest expense | (101) | (111) | (192) | (226)
Other Operations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Investment Income | 88 | 136 | 196 | 212
Income from continuing operations before income tax expense | (3) | (47) | 18 | (136)
Elimination and consolidations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Investment Income | (4) | (3) | (3) | 0
Income from continuing operations before income tax expense | (2) | (5) | (2) | (6)
North America Commercial | Reportable Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Premiums Written | 2,863 | 2,750 | 4,037 | 3,783
Net Premiums Earned | 2,133 | 1,940 | 4,257 | 3,923
Loss and Loss Adjustment Expenses Incurred | 1,340 | 1,307 | 2,866 | 2,577
Amortization of DAC | 206 | 189 | 433 | 409
Other Acquisition Cost | 46 | 63 | 93 | 100
General Operating Expense | 240 | 190 | 435 | 410
Underwriting Income (Loss) | 301 | 191 | 430 | 427
International Commercial | Reportable Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Premiums Written | 2,325 | 2,284 | 4,352 | 4,223
Net Premiums Earned | 2,124 | 2,031 | 4,175 | 4,042
Loss and Loss Adjustment Expenses Incurred | 1,170 | 1,201 | 2,348 | 2,289
Amortization of DAC | 269 | 250 | 514 | 494
Other Acquisition Cost | 84 | 81 | 178 | 170
General Operating Expense | 301 | 269 | 595 | 529
Underwriting Income (Loss) | 300 | 230 | 540 | 560
Global Personal | Reportable Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Premiums Written | 1,692 | 1,899 | 3,017 | 3,439
Net Premiums Earned | 1,621 | 1,778 | 3,215 | 3,570
Loss and Loss Adjustment Expenses Incurred | 918 | 1,000 | 1,980 | 1,995
Amortization of DAC | 371 | 402 | 724 | 766
Other Acquisition Cost | 71 | 114 | 162 | 263
General Operating Expense | 236 | 253 | 450 | 507
Underwriting Income (Loss) | $ 25 | $ 9 | $ (101) | $ 39

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