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REGULATORY ASSETS, LIABILITIES, AND BALANCING ACCOUNTS (Long-Term Regulatory Liabilities) (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024 | Jun. 30, 2022
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Regulatory Liabilities [Line Items] |  |  |
Total noncurrent regulatory liabilities | $ 20,061 | $ 19,417 |
Cost of removal obligations |  |  |
Regulatory Liabilities [Line Items] |  |  |
Total noncurrent regulatory liabilities | 9,339 | 8,943 |
Public purpose programs |  |  |
Regulatory Liabilities [Line Items] |  |  |
Total noncurrent regulatory liabilities | 1,183 | 1,112 |
Employee benefit plans |  |  |
Regulatory Liabilities [Line Items] |  |  |
Total noncurrent regulatory liabilities | 1,103 | 1,088 |
Transmission tower wireless licenses |  |  |
Regulatory Liabilities [Line Items] |  |  |
Total noncurrent regulatory liabilities | 270 | 306 |
SFGO sale |  |  |
Regulatory Liabilities [Line Items] |  |  |
Total noncurrent regulatory liabilities | 20 | 79 |
SB 901 securitization |  |  |
Regulatory Liabilities [Line Items] |  |  |
Total noncurrent regulatory liabilities | 6,103 | 6,295 | $ 5,540
Wildfire self-insurance |  |  |
Regulatory Liabilities [Line Items] |  |  |
Total noncurrent regulatory liabilities | 817 | 804 |
Other |  |  |
Regulatory Liabilities [Line Items] |  |  |
Total noncurrent regulatory liabilities | $ 1,226 | $ 790 |

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