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INVESTMENTS - Schedule of Components of Net Investment Income (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Debt Securities, Available-for-Sale [Line Items] |  |
Gross investment income before adjustments | $ 490 | $ 465
Funds held interest income (expense) | 12 | 6
Future policy benefit reserve income (expense) | 0 | 0
Gross investment income | 502 | 470
Investment expenses | 11 | 13
Net investment income | 491 | 457
Fixed maturities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Gross investment income before adjustments | 386 | 352
Equity securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Gross investment income before adjustments | 1 | 1
Short-term investments and cash |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Gross investment income before adjustments | 48 | 38
Limited partnerships |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Gross investment income before adjustments | 25 | 54
Other |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Gross investment income before adjustments | $ 30 | $ 20

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