OTHER CONTINGENCIES AND COMMITMENTS (Tax Matters) (Details) - USD ($) $ in Millions |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2026 |
Dec. 31, 2024 |
|
| Investments, Owned, Federal Income Tax Note [Line Items] | ||
| Income tax deduction, repair costs | $ 850 | |
| Income tax deduction, customer bill credits | $ 400 | |
| Utility | ||
| Investments, Owned, Federal Income Tax Note [Line Items] | ||
| Income tax deduction, accrued amount | $ 70 |