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OTHER CONTINGENCIES AND COMMITMENTS (Interim Rate Relief Subject to Refund) (Details) - Pacific Gas & Electric Co (Utility) - USD ($) $ in Millions | Sep. 16, 2024 | Mar. 07, 2024 | Dec. 01, 2023 | Jun. 15, 2023 | Jun. 08, 2023 | Dec. 15, 2022
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2022 WMCE Interim Rate Relief |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Cost recovery |  |  |  |  |  | $ 1,360
Interim revenue requirement |  |  |  |  |  | 1,290
Recorded expenditures, expenses |  |  |  |  |  | 1,200
Recorded expenditures, capital expenditures |  |  |  |  |  | $ 136
Interim rate relief |  |  |  |  | $ 1,100 |
Remaining value recoverable |  |  |  |  | $ 224 |
Wildfire and Gas Safety Costs Interim Rate Relief |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Cost recovery |  |  |  | $ 2,500 |  |
Interim revenue requirement |  |  |  | 688 |  |
Interim rate relief |  | $ 516 |  |  |  |
Remaining value recoverable |  | $ 172 |  |  |  |
Wildfire Costs Interim Rate Relief |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Recorded expenditures, expenses |  |  |  | 726 |  |
Recorded expenditures, capital expenditures |  |  |  | 1,500 |  |
Gas Safety Costs Interim Rate Relief |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Recorded expenditures, expenses |  |  |  | 120 |  |
Recorded expenditures, capital expenditures |  |  |  | $ 118 |  |
2023 WMCE Interim Rate Relief |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Cost recovery |  |  | $ 2,180 |  |  |
Interim revenue requirement |  |  | 1,860 |  |  |
Recorded expenditures, expenses |  |  | 1,600 |  |  |
Recorded expenditures, capital expenditures |  |  | 559 |  |  |
Interim rate relief | $ 944 |  |  |  |  |
Remaining value recoverable | $ 914 |  |  |  |  |
2023 WMCE Interim Rate Relief, CEMA Event |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Recorded expenditures, expenses |  |  | 239 |  |  |
Recorded expenditures, capital expenditures |  |  | $ 167 |  |  |

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