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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Revenues Disaggregated by Type of Customer) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Disaggregation of Revenue [Abstract] |  |  |  |
Total operating revenues | $ 5,986 | $ 5,290 | $ 11,847 | $ 11,499
Electric |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Total operating revenues | 4,458 | 3,852 | 8,510 | 7,971
Natural gas |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Total operating revenues | 1,528 | 1,438 | 3,337 | 3,528
Pacific Gas & Electric Co (Utility) |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Total operating revenues | 5,986 | 5,290 | 11,847 | 11,499
Pacific Gas & Electric Co (Utility) | Electric |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Total revenue from contracts with customers | 4,876 | 3,275 | 8,919 | 6,278
Regulatory balancing accounts | (418) | 577 | (409) | 1,693
Total operating revenues | 4,458 | 3,852 | 8,510 | 7,971
Pacific Gas & Electric Co (Utility) | Electric | Residential |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Total revenue from contracts with customers | 1,516 | 1,404 | 3,315 | 2,693
Pacific Gas & Electric Co (Utility) | Electric | Commercial |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Total revenue from contracts with customers | 1,655 | 1,283 | 3,160 | 2,427
Pacific Gas & Electric Co (Utility) | Electric | Industrial |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Total revenue from contracts with customers | 441 | 375 | 854 | 728
Pacific Gas & Electric Co (Utility) | Electric | Agricultural |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Total revenue from contracts with customers | 439 | 314 | 619 | 469
Pacific Gas & Electric Co (Utility) | Electric | Public street and highway lighting |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Total revenue from contracts with customers | 27 | 20 | 52 | 39
Pacific Gas & Electric Co (Utility) | Electric | Other, net |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Total revenue from contracts with customers | 798 | (121) | 919 | (78)
Pacific Gas & Electric Co (Utility) | Natural gas |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Total revenue from contracts with customers | 686 | 1,021 | 2,987 | 3,708
Regulatory balancing accounts | 842 | 417 | 350 | (180)
Total operating revenues | 1,528 | 1,438 | 3,337 | 3,528
Pacific Gas & Electric Co (Utility) | Natural gas | Residential |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Total revenue from contracts with customers | 213 | 691 | 1,730 | 2,574
Pacific Gas & Electric Co (Utility) | Natural gas | Commercial |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Total revenue from contracts with customers | 187 | 189 | 560 | 702
Pacific Gas & Electric Co (Utility) | Natural gas | Transportation service only |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Total revenue from contracts with customers | 424 | 398 | 899 | 842
Pacific Gas & Electric Co (Utility) | Natural gas | Other, net |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Total revenue from contracts with customers | $ (138) | $ (257) | $ (202) | $ (410)

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