NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Renewable Energy Credits) (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Renewable Energy Credits [Roll Forward] | ||
| Beginning of Period | $ 82 | $ 69 |
| Purchased | 57 | 58 |
| Used for Compliance | (45) | (45) |
| End of Period | $ 94 | $ 82 |