WILDFIRE-RELATED CONTINGENCIES (Wildfire-Related Derivative Litigation) (Details) - Breach of Fiduciary Duties	Feb. 24, 2021 notice	Nov. 20, 2017 lawsuit	Nov. 16, 2017 lawsuit
Subsequent Event
Loss Contingencies [Line Items]
Number of causes of action (causes) | notice	2
Derivative Lawsuits Filed in the San Francisco County Superior Court
Loss Contingencies [Line Items]
Number of lawsuits filed against company (lawsuit, complaint) | lawsuit		2	2