SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - OTHER INCOME (EXPENSE), NET (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other Income [Line Items]
Allowance for equity funds used during construction	$ 150	$ 140	$ 143
Investment gains (losses), net	36	28	(42)
Gains on interest rate and foreign exchange instruments, net	2	4	11
Foreign currency transaction gains (losses), net	(16)	2	(24)
Non-service components of net periodic benefit cost	(101)	(106)	(59)
Interest on regulatory balancing accounts, net	75	79	26
Sundry, net	(10)	(16)	(31)
Total	136	131	24
SDG&E
Other Income [Line Items]
Allowance for equity funds used during construction	73	86	88
Non-service components of net periodic benefit cost	4	(19)	(11)
Interest on regulatory balancing accounts, net	23	42	18
Sundry, net	(10)	(12)	(3)
Total	90	97	92
SoCalGas
Other Income [Line Items]
Allowance for equity funds used during construction	72	54	55
Non-service components of net periodic benefit cost	(86)	(80)	(42)
Interest on regulatory balancing accounts, net	52	37	8
Sundry, net	(13)	(15)	(29)
Total	$ 25	$ (4)	(8)
IMG JV
Other Income [Line Items]
Foreign currency transaction gains (losses), net			$ (11)