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
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