INVESTMENTS - Fixed Maturities (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Investments, Debt and Equity Securities [Abstract] | ||||
| Net investment gains (losses) recognized during the period on securities held at the end of the period | $ 27 | $ 5 | $ 5 | $ 12 |
| Net investment gains (losses) recognized on securities sold during the period | (18) | (1) | (15) | 1 |
| Unrealized and realized gains (losses) from fixed maturities | 9 | 4 | (10) | 13 |
| Interest and dividend income from fixed maturities | 9 | (4) | 18 | (4) |
| Net investment income (loss) from fixed maturities | $ 18 | $ 0 | $ 8 | $ 9 |