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INVESTMENTS - Schedule of Components of Net Investment Income (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Gross investment income before adjustments | $ 546 | $ 504 | $ 1,577 | $ 1,506
Funds held interest income (expense) | 7 | 5 | 22 | 20
Future policy benefit reserve income (expense) | 0 | 1 | 0 | 0
Gross investment income | 553 | 510 | 1,598 | 1,525
Investment expenses | 13 | 13 | 35 | 44
Net investment income | 540 | 496 | 1,563 | 1,481
Fixed maturities |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Gross investment income before adjustments | 390 | 378 | 1,172 | 1,099
Equity securities |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Gross investment income before adjustments | 1 | 1 | 3 | 3
Short-term investments and cash |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Gross investment income before adjustments | 43 | 54 | 125 | 135
Limited partnerships |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Gross investment income before adjustments | 76 | 36 | 189 | 183
Other |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Gross investment income before adjustments | $ 36 | $ 36 | $ 87 | $ 85

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