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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Revenues Disaggregated by Type of Customer) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | $ 24,428 | $ 21,680 | $ 20,642
Electric |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | 17,424 | 15,060 | 15,131
Natural gas |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | 7,004 | 6,620 | 5,511
Pacific Gas & Electric Co (Utility) |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | 24,428 | 21,680 | 20,642
Pacific Gas & Electric Co (Utility) | Electric |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | 15,100 | 14,832 | 14,178
Regulatory balancing accounts | 2,324 | 228 | 953
Total operating revenues | 17,424 | 15,060 | 15,131
Pacific Gas & Electric Co (Utility) | Electric | Residential |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | 6,041 | 6,130 | 6,089
Pacific Gas & Electric Co (Utility) | Electric | Commercial |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | 5,643 | 5,416 | 5,042
Pacific Gas & Electric Co (Utility) | Electric | Industrial |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | 1,784 | 1,626 | 1,493
Pacific Gas & Electric Co (Utility) | Electric | Agricultural |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | 1,413 | 1,830 | 1,565
Pacific Gas & Electric Co (Utility) | Electric | Public street and highway lighting |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | 83 | 77 | 73
Pacific Gas & Electric Co (Utility) | Electric | Other, net |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | 136 | (247) | (84)
Pacific Gas & Electric Co (Utility) | Natural gas |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | 6,196 | 6,055 | 4,958
Regulatory balancing accounts | 808 | 565 | 553
Total operating revenues | 7,004 | 6,620 | 5,511
Pacific Gas & Electric Co (Utility) | Natural gas | Residential |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | 3,686 | 3,353 | 2,759
Pacific Gas & Electric Co (Utility) | Natural gas | Commercial |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | 1,052 | 1,005 | 713
Pacific Gas & Electric Co (Utility) | Natural gas | Transportation service only |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | 1,603 | 1,534 | 1,346
Pacific Gas & Electric Co (Utility) | Natural gas | Other, net |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Total operating revenues | $ (145) | $ 163 | $ 140

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