EMPLOYEE BENEFIT PLANS - OBLIGATIONS OF FUNDED AND UNFUNDED PENSION AND PBOP PLANS (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Disposal Group Held-for-sale | SI Partners
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation held for sale	$ 24
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	2,868	$ 2,900
Pension Plan | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	770	781
Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	1,801	1,824
Funded Plan | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	811	2,752
Accumulated benefit obligation	755	2,542
Fair value of plan assets	807	2,724
Funded Plan | Pension Plan | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	811	793
Accumulated benefit obligation	755	755
Fair value of plan assets	807	787
Funded Plan | Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	0	1,959
Accumulated benefit obligation	0	1,787
Fair value of plan assets	0	1,937
Unfunded Plan | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	134	183
Accumulated benefit obligation	114	159
Unfunded Plan | Pension Plan | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	17	29
Accumulated benefit obligation	15	26
Unfunded Plan | Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	20	40
Accumulated benefit obligation	17	37
Unfunded Plan | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 9	$ 9