EMPLOYEE BENEFIT PLANS - AMOUNTS IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	$ (106)	$ (120)
Prior service cost	(5)	(9)
Total	(111)	(129)
Pension Plan | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	(6)	(12)
Total	(6)	(12)
Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	(6)	(14)
Prior service cost	(2)	(3)
Total	(8)	(17)
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	13	14
Prior service cost	0	0
Total	$ 13	$ 14