EMPLOYEE BENEFIT PLANS - PENSION AND PBOP OBLIGATIONS, NET OF PLAN ASSETS (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liabilities	$ (124)	$ (168)
Disposal Group Held-for-sale | SI Partners
Defined Benefit Plan Disclosure [Line Items]
Pension obligation, net of plan assets, held for sale	24
SDG&E
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liabilities	(19)	(28)
SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liabilities	(18)	(45)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	124	6
Current liabilities	(21)	(50)
Noncurrent liabilities	(116)	(160)
Net recorded asset (liability) at December 31	(13)	(204)
Pension Plan | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0	0
Current liabilities	(2)	(7)
Noncurrent liabilities	(19)	(28)
Net recorded asset (liability) at December 31	(21)	(35)
Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	116	0
Current liabilities	(2)	(17)
Noncurrent liabilities	(18)	(45)
Net recorded asset (liability) at December 31	96	(62)
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	520	507
Current liabilities	(1)	(1)
Noncurrent liabilities	(8)	(8)
Net recorded asset (liability) at December 31	511	498
Other Postretirement Benefits Plan | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	5	11
Current liabilities	0	0
Noncurrent liabilities	0	0
Net recorded asset (liability) at December 31	5	11
Other Postretirement Benefits Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	503	486
Current liabilities	0	0
Noncurrent liabilities	0	0
Net recorded asset (liability) at December 31	$ 503	$ 486