DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE COMMODITY VOLUMES (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2024 MMBTU MWh	Dec. 31, 2023 MWh MMBTU
Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount | MMBTU	455	361
Electricity
Derivative [Line Items]
Derivative, nonmonetary notional amount | MWh	0	1
Congestion revenue rights
Derivative [Line Items]
Derivative, nonmonetary notional amount | MWh	16	36
SDG&E | Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount | MMBTU	18	17
SDG&E | Congestion revenue rights
Derivative [Line Items]
Derivative, nonmonetary notional amount | MWh	16	36
SoCalGas | Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount | MMBTU	405	268