INVESTMENTS - Trading Securities (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 | $ 44 | $ 50 | $ 13 | $ 33 |
| Net investment gains (losses) recognized on securities sold during the period | 2 | (10) | 2 | 6 |
| Unrealized and realized gains (losses) on trading securities | 46 | 40 | 15 | 39 |
| Interest and dividend income from trading securities | 23 | 25 | 42 | 34 |
| Net investment income (loss) from trading securities | $ 69 | $ 65 | $ 57 | $ 73 |