INVESTMENTS - Fixed Maturities (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Investments, Debt and Equity Securities [Abstract] | ||
| Net investment gains (losses) recognized during the period on securities held at the end of the period | $ (22) | $ 7 |
| Net investment gains (losses) recognized on securities sold during the period | 3 | 2 |
| Unrealized and realized gains (losses) from fixed maturities | (19) | 9 |
| Interest and dividend income from fixed maturities | 9 | 0 |
| Net investment income (loss) from fixed maturities | $ (10) | $ 9 |