OTHER CONTINGENCIES AND COMMITMENTS (Ex Parte Communication Rules) (Details) $ in Millions	Dec. 05, 2019 USD ($)
Loss Contingencies [Line Items]
Settlement agreement, proposed payment to California General Fund	$ 2
Ex Parte Communications
Loss Contingencies [Line Items]
Settlement agreement, proposed penalty	10
Settlement agreement, proposed forgone revenue collection, 2019 GT&S rate case	5
Settlement agreement, proposed forgone revenue collection, 2020 GRC cycle	1
Settlement agreement, proposed compensation payments, San Bruno	1
Settlement agreement, proposed compensation payments, San Carlos	$ 1