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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, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |
Adjusted Revenues | $ 6,560 | $ 7,436 | $ 13,323 | $ 14,145
Adjusted Pre-tax Income (Loss) | 617 | 886 | 1,675 | 1,288
Changes in the fair values of equity securities and AIG's investment in Corebridge | 59 | 41 | 147 | 62
Other income (expense) - net | 15 | 8 | 17 | 23
Gain (loss) on extinguishment of debt | (1) | 0 | (1) | 0
Net Investment Income | 990 | 837 | 1,969 | 1,681
Net realized gains (losses) | (180) | (14) | (267) | (525)
Net realized losses, adjusted revenues | (188) | (67) | (240) | (386)
Net realized losses, adjusted pre-tax income (loss) | (186) | (64) | (241) | (383)
Net gain (loss) on divestitures and other | 102 | (15) | 102 | (12)
Non-operating litigation reserves and settlements, adjustment to revenue | 0 | 0 | 0 | 1
Non-operating litigation reserves and settlements, pre-tax income (loss) | 0 | (1) | 0 | 0
Favorable prior year development and related amortization changes ceded under retroactive reinsurance agreements | 62 | 18 | 60 | 37
Net loss reserve discount charge | (26) | (16) | (102) | (80)
Pension expense related to lump sum payments to former employees | 0 | (54) |  | (54)
Integration and transaction costs associated with acquiring or divesting businesses | (18) | (8) | (15) | (8)
Restructuring and other costs | (426) | (125) | (493) | (215)
Non-recurring costs related to regulatory or accounting changes | (7) | (7) | (11) | (15)
Net impact from elimination of international reporting lag, adjusted revenues |  |  |  | 4
Net impact from elimination of international reporting lag, adjusted pre-tax income (loss) |  |  |  | 12
Fortitude Re funds withheld assets |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Investment Income | 33 | 25 | 72 | 77
Net realized gains (losses) | (1) | (7) | (20) | (61)
Fortitude Re funds withheld embedded derivative |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net realized gains (losses) | 8 | 58 | (1) | (82)
Total |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Adjusted Revenues | 6,634 | 7,378 | 13,348 | 14,507
Adjusted Pre-tax Income (Loss) | 1,018 | 1,041 | 2,178 | 2,010
Corporate Reconciling Items And Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Adjusted Revenues | 139 | 156 | 305 | 280
Adjusted Pre-tax Income (Loss) | (158) | (278) | (356) | (557)
Other Operations before consolidation and eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Adjusted Revenues | 144 | 173 | 308 | 319
Adjusted Pre-tax Income (Loss) | (158) | (270) | (355) | (544)
Consolidation and eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Adjusted Revenues | (5) | (17) | (3) | (39)
Adjusted Pre-tax Income (Loss) | 0 | (8) | (1) | (13)
General Insurance | Net investment income |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Adjusted Revenues | 746 | 725 |  |
Adjusted Pre-tax Income (Loss) | 746 | 725 |  |
General Insurance | Reportable Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Adjusted Revenues | 6,495 | 7,222 | 13,043 | 14,227
Adjusted Pre-tax Income (Loss) | 1,176 | 1,319 | 2,534 | 2,567
General Insurance | Reportable Segments | North America |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Adjusted Revenues | 2,470 | 3,195 | 4,972 | 6,175
Adjusted Pre-tax Income (Loss) | 163 | 352 | 387 | 651
General Insurance | Reportable Segments | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Adjusted Revenues | 3,279 | 3,302 | 6,563 | 6,581
Adjusted Pre-tax Income (Loss) | $ 267 | $ 242 | 639 | 445
General Insurance | Reportable Segments | Net investment income |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Adjusted Revenues |  |  | 1,508 | 1,471
Adjusted Pre-tax Income (Loss) |  |  | $ 1,508 | $ 1,471

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