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BUSINESS SEGMENT INFORMATION - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Segment Reporting Information [Line Items] |  |  |  |
Net Income (Loss) Attributable to Parent | $ (1,309) | $ (132) | $ (1,595) | $ 388
Reconciliation Of Revenue From Segments To Consolidated [Abstract] |  |  |  |
Operating earnings (loss) | 455 | 517 | 1,228 | 1,489
Income (Loss) due to Novation in Pre-Tax Net Income |  |  | 499 | 0
Other operating costs and expenses | 440 | 329 | 1,817 | 1,309
Novation |  |  |  |
Reconciliation Of Revenue From Segments To Consolidated [Abstract] |  |  |  |
Income (Loss) due to Novation in Pre-Tax Net Income |  |  | 499 |
Increase in Pre tax AOCI |  |  | 263 |
Total Impact loss |  |  | 236 |
Adjustments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Income (Loss) Attributable to Parent | (1,309) | (132) | (1,595) | 388
Reconciliation Of Revenue From Segments To Consolidated [Abstract] |  |  |  |
Variable annuity product | 978 | 756 | 2,123 | 1,167
Gain (Loss) On Investments, Adjustments | 1,170 | 46 | 1,255 | 101
Actuarial Gain (Loss) Adjustments, Defined Benefit Plan | 19 | 13 | 41 | 44
Other adjustments | (164) | 1 | (96) | 59
Income Tax Expense (Benefit), Resulting From Adjustments To Income | (437) | (172) | (714) | (288)
Non-recurring tax items | 198 | 5 | 214 | 18
Gross legal expenses related to cost of insurance litigation | (230) | $ 0 | (262) | $ 106
Other operating costs and expenses | (8) |  | $ 6 |
Adjustments | RGA Reinsurance Company |  |  |  |
Reconciliation Of Revenue From Segments To Consolidated [Abstract] |  |  |  |
Gain (Loss) On Investments, Adjustments | $ 1,100 |  |  |

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