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OTHER CONTINGENCIES AND COMMITMENTS (CPUC and FERC Matters) (Details) $ in Thousands | Jun. 30, 2019 USD ($) | Jun. 27, 2019 wildfire violation | Sep. 21, 2018 | May 17, 2018 USD ($) | Apr. 26, 2018 USD ($) | Jun. 28, 2019 USD ($) | Dec. 06, 2018 consultant
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Ex Parte Communications |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Proposed penalty |  |  |  |  | $ 97,500 |  |
Payment to State General Fund |  |  |  | $ 12,000 | 12,000 |  |
Gas transmission and storage revenue reduction |  |  |  |  | 63,500 |  |
2018 GT&S revenue requirement reduction |  |  |  |  | 31,750 |  |
2019 GT&S revenue requirement reduction |  |  |  |  | 31,750 |  |
Revenue requirement reduction in next GRC cycle |  |  |  |  | 10,000 |  |
Payment to city of San Bruno |  |  |  | 6,000 | 6,000 |  |
Payment to city of San Carlos |  |  |  | $ 6,000 | $ 6,000 |  |
Settlement agreement, proposed penalty |  |  |  |  |  | $ 10,000 |
Settlement agreement, proposed payment to California General Fund |  |  |  |  |  | 2,000 |
Settlement agreement, proposed forgone revenue collection, 2019 GT&S rate case |  |  |  |  |  | 5,000 |
Settlement agreement, proposed forgone revenue collection, 2020 GRC cycle |  |  |  |  |  | 1,000 |
Settlement agreement, proposed compensation payments |  |  |  |  |  | 2,000 |
Settlement agreement, proposed compensation payments, San Bruno |  |  |  |  |  | 1,000 |
Settlement agreement, proposed compensation payments, San Carlos |  |  |  |  |  | $ 1,000 |
Loss contingency liability | $ 4,000 |  |  |  |  |  |
Disallowance of Plant Costs |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Accrual for GTandS revenue requirement reduction | 16,000 |  |  |  |  |  |
Pacific Gas & Electric Co | 2017 Northern California wildfires |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Number of alleged violations (violation) | violation |  | 27 |  |  |  |  |
Alleged violations, number of wildfires (wildfire) | wildfire |  | 12 |  |  |  |  |
Qualifications of vegetation management personnel, corrective actions, period |  | 30 days |  |  |  |  |
Pacific Gas & Electric Co | Cherokee, La Porte and Tubbs Fires |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Number of alleged violations (violation) | violation |  | 0 |  |  |  |  |
Pacific Gas & Electric Co | 37 Fire |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Number of alleged violations (violation) | violation |  | 0 |  |  |  |  |
Pacific Gas & Electric Co | Ex Parte Communications |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loss contingency liability | $ 4,000 |  |  |  |  |  |
Pacific Gas & Electric Co | Pending Litigation | Unfavorable Regulatory Action |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Number of consultants retained | consultant |  |  |  |  |  |  | 2
Electric | Pacific Gas & Electric Co |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Requested revenue rate |  |  | 98.85% |  |  |  |
Minimum | Pacific Gas & Electric Co | 2017 Northern California wildfires |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Prehearing conference, period after initiation of proceedings |  | 45 days |  |  |  |  |
Maximum | Pacific Gas & Electric Co | 2017 Northern California wildfires |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Prehearing conference, period after initiation of proceedings |  | 60 days |  |  |  |  |

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