DERIVATIVE FINANCIAL INSTRUMENTS - COMMODITY VOLUMES (Details)	12 Months Ended
	Dec. 31, 2023 MMBTU MWh	Dec. 31, 2022 MMBTU MWh
Natural gas
Derivatives, Fair Value [Line Items]
Notional amount, energy measure | MMBTU	361	254
Natural gas | SDG&E
Derivatives, Fair Value [Line Items]
Notional amount, energy measure | MMBTU	17	15
Natural gas | SoCalGas
Derivatives, Fair Value [Line Items]
Notional amount, energy measure | MMBTU	268	224
Electricity
Derivatives, Fair Value [Line Items]
Notional amount, energy measure | MWh	1	1
Congestion revenue rights
Derivatives, Fair Value [Line Items]
Notional amount, energy measure | MWh	36	42
Congestion revenue rights | SDG&E
Derivatives, Fair Value [Line Items]
Notional amount, energy measure | MWh	36	42