EMPLOYEE BENEFIT PLANS - OBLIGATIONS OF FUNDED AND UNFUNDED PENSION AND PBOP PLANS (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 2,900	$ 2,865
Pension Plan | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	781	769
Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	1,824	1,799
Funded Plan | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	2,752	2,925
Accumulated benefit obligation	2,542	2,712
Fair value of plan assets	2,724	2,664
Funded Plan | Pension Plan | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	793	781
Accumulated benefit obligation	755	746
Fair value of plan assets	787	726
Funded Plan | Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	1,959	1,944
Accumulated benefit obligation	1,787	1,771
Fair value of plan assets	1,937	1,744
Unfunded Plan | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	183	182
Accumulated benefit obligation	159	153
Unfunded Plan | Pension Plan | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	29	26
Accumulated benefit obligation	26	23
Unfunded Plan | Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	40	33
Accumulated benefit obligation	37	28
Unfunded Plan | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 9	$ 9