EMPLOYEE BENEFIT PLANS - OBLIGATIONS OF FUNDED AND UNFUNDED PENSION AND PBOP PLANS (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 2,574	$ 3,419
Pension Plan | San Diego Gas and Electric Company
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	678	824
Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	1,644	2,306
Funded Plan | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	2,476	2,612
Accumulated benefit obligation	2,277	2,277
Fair value of plan assets	2,205	2,095
Funded Plan | Pension Plan | San Diego Gas and Electric Company
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	691
Accumulated benefit obligation	658
Fair value of plan assets	670
Funded Plan | Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	1,785	2,612
Accumulated benefit obligation	1,619	2,277
Fair value of plan assets	1,535	2,095
Funded Plan | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation		34
Fair value of plan assets		33
Unfunded Plan | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	153	178
Accumulated benefit obligation	124	139
Unfunded Plan | Pension Plan | San Diego Gas and Electric Company
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	23	26
Accumulated benefit obligation	20	22
Unfunded Plan | Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	29	35
Accumulated benefit obligation	25	29
Unfunded Plan | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 10	$ 12