EMPLOYEE BENEFIT PLANS - WEIGHTED-AVERAGE ASSUMPTIONS USED TO DETERMINE NET PERIODIC BENEFIT COST (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.04%	2.78%	3.49%
Expected return on plan assets	6.27%	6.47%	7.00%
Interest crediting rate	1.94%	1.62%	2.28%
Pension Plan | San Diego Gas and Electric Company
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.99%	2.73%	3.44%
Expected return on plan assets	5.50%	6.25%	7.00%
Interest crediting rate	1.94%	1.62%	2.28%
Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.04%	2.79%	3.50%
Expected return on plan assets	6.75%	6.75%	7.00%
Interest crediting rate	1.94%	1.62%	2.28%
Pension Plan | Minimum
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	2.70%	2.70%	2.70%
Pension Plan | Minimum | San Diego Gas and Electric Company
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	3.50%	2.70%	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 | San Diego Gas and Electric Company
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	3.04%	2.88%	3.54%
Expected return on plan assets	4.77%	4.76%	4.64%
Interest crediting rate	1.94%	1.62%	2.28%
Other Postretirement Benefits Plan | San Diego Gas and Electric Company
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.05%	2.85%	3.55%
Expected return on plan assets	4.80%	4.81%	5.51%
Interest crediting rate	1.94%	1.62%	2.28%
Other Postretirement Benefits Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.05%	2.90%	3.55%
Expected return on plan assets	4.71%	4.70%	4.41%
Interest crediting rate	1.94%	1.62%	2.28%
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 | San Diego Gas and Electric Company
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	3.50%	2.70%	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 | San Diego Gas and Electric Company
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%