SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - OTHER INCOME (EXPENSE), NET (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Other Income [Line Items]
Allowance for equity funds used during construction	$ 174	$ 150	$ 140
Investment gains (losses), net	52	36	28
(Losses) gains on interest rate and foreign exchange instruments, net	(2)	2	4
Foreign currency transaction gains (losses), net	13	(16)	2
Non-service components of net periodic benefit cost	(142)	(101)	(106)
Interest on regulatory balancing accounts, net	93	75	79
Sundry, net	(19)	(10)	(16)
Total	169	136	131
SDG&E
Other Income [Line Items]
Allowance for equity funds used during construction	79	73	86
Non-service components of net periodic benefit cost	(27)	4	(19)
Interest on regulatory balancing accounts, net	59	23	42
Sundry, net	(5)	(10)	(12)
Total	106	90	97
SoCalGas
Other Income [Line Items]
Allowance for equity funds used during construction	69	72	54
Non-service components of net periodic benefit cost	(99)	(86)	(80)
Interest on regulatory balancing accounts, net	34	52	37
Sundry, net	(10)	(13)	(15)
Total	$ (6)	$ 25	$ (4)