OTHER CONTINGENCIES AND COMMITMENTS (Enforcement and Litigation Matters) (Details) - Pacific Gas & Electric Co $ in Millions	Jan. 26, 2017 USD ($)	Jan. 04, 2019 wildfire	Oct. 30, 2017 wildfire	Aug. 09, 2016 count
2017 Northern California wildfires
Loss Contingencies [Line Items]
Number of wildfires (wildfire) | wildfire		18	21
Judicial Ruling | Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Number of guilty counts of obstructing a federal agency proceeding				1
Number of guilty counts of violating pipeline integrity management regulations				5
Corporate probation period, term	5 years
Oversight by third-party monitor period, application for early termination, term	3 years
Damages awarded, value | $	$ 3