EMPLOYEE BENEFIT PLANS - AMOUNTS IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	$ (124)	$ (95)
Prior service cost	(6)	(5)
Total	(130)	(100)
Pension Plan | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	(8)	(6)
Prior service cost	0	(1)
Total	(8)	(7)
Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	(10)	(9)
Prior service cost	(2)	(3)
Total	(12)	(12)
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	13	14
Prior service cost	0	0
Total	$ 13	$ 14