FAIR VALUE MEASUREMENTS - Activity for Investments (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Fair Value Disclosures [Abstract] | ||||
| Proceeds from Investment Sales | $ 0 | $ 7 | $ 7 | $ 17 |
| Purchases of Investments | 13 | 5 | 15 | 7 |
| Gross Realized Gains on Investment Sales | 0 | 0 | 1 | 4 |
| Gross Realized Losses on Investment Sales | $ 0 | $ 1 | $ 0 | $ 1 |