EMPLOYEE BENEFIT PLANS - WEIGHTED-AVERAGE ASSUMPTIONS USED TO DETERMINE NET PERIODIC BENEFIT COST (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.63%	3.04%	2.78%
Expected return on plan assets	6.48%	6.27%	6.47%
Interest crediting rate	3.99%	1.94%	1.62%
Pension Plan | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.60%	2.99%	2.73%
Expected return on plan assets	6.00%	5.50%	6.25%
Interest crediting rate	3.99%	1.94%	1.62%
Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.60%	3.04%	2.79%
Expected return on plan assets	6.75%	6.75%	6.75%
Interest crediting rate	3.99%	1.94%	1.62%
Pension Plan | Minimum
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	2.70%	2.70%	2.70%
Pension Plan | Minimum | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	3.50%	3.50%	2.70%
Pension Plan | Minimum | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	2.70%	2.70%	2.70%
Pension Plan | Maximum
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	10.00%	10.00%	10.00%
Pension Plan | Maximum | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	10.00%	10.00%	10.00%
Pension Plan | Maximum | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	10.00%	10.00%	10.00%
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.65%	3.04%	2.88%
Expected return on plan assets	5.51%	4.77%	4.76%
Interest crediting rate	3.99%	1.94%	1.62%
Other Postretirement Benefits Plan | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.65%	3.05%	2.85%
Expected return on plan assets	5.52%	4.80%	4.81%
Interest crediting rate	3.99%	1.94%	1.62%
Other Postretirement Benefits Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.65%	3.05%	2.90%
Expected return on plan assets	5.47%	4.71%	4.70%
Interest crediting rate	3.99%	1.94%	1.62%
Other Postretirement Benefits Plan | Minimum
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	2.70%	2.70%	2.70%
Other Postretirement Benefits Plan | Minimum | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	3.50%	3.50%	2.70%
Other Postretirement Benefits Plan | Minimum | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	2.70%	2.70%	2.70%
Other Postretirement Benefits Plan | Maximum
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	10.00%	10.00%	10.00%
Other Postretirement Benefits Plan | Maximum | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	10.00%	10.00%	10.00%
Other Postretirement Benefits Plan | Maximum | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	10.00%	10.00%	10.00%