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INVESTMENTS - Schedule of Components of Net Investment Income (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Gross investment income before adjustments | $ 537 | $ 369 | $ 1,001 | $ 641
Funds held interest income (expense) | 9 | 2 | 15 | 2
Future policy benefit reserve income (expense) | 0 | 0 | 0 | 0
Gross investment income | 545 | 371 | 1,016 | 643
Investment expenses | 18 | 14 | 31 | 26
Net investment income | 528 | 357 | 985 | 617
Fixed maturities |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Gross investment income before adjustments | 369 | 276 | 721 | 523
Equity securities |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Gross investment income before adjustments | 1 | 1 | 2 | 2
Short-term investments and cash |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Gross investment income before adjustments | 43 | 34 | 81 | 51
Limited partnerships |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Gross investment income before adjustments | 94 | 53 | 148 | 38
Other |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Gross investment income before adjustments | $ 30 | $ 6 | $ 50 | $ 27

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