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OTHER CONTINGENCIES AND COMMITMENTS (Tax Matters) (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Loss Contingencies [Line Items] |  |
Income tax deduction, repair costs | $ 850 |
Income tax deduction, customer bill credits | $ 400 |
Utility |  |
Loss Contingencies [Line Items] |  |
Income tax deduction, accrued amount |  | $ 70

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