GENERAL INFORMATION AND OTHER FINANCIAL DATA - OTHER INCOME (EXPENSE), NET (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Other Income [Line Items]
Allowance for equity funds used during construction	$ 43	$ 39	$ 130	$ 114
Investment gains, net	22	29	47	48
(Losses) gains on interest rate and foreign exchange instruments, net	(1)	1	(2)	2
Foreign currency transaction gains (losses), net	4	(5)	10	(6)
Non-service components of net periodic benefit cost	(40)	(21)	(48)	(25)
Interest on regulatory balancing accounts, net	29	26	70	68
Sundry, net	(8)	(4)	(8)	(7)
Total	49	65	199	194
SDG&E
Other Income [Line Items]
Allowance for equity funds used during construction	19	21	61	60
Non-service components of net periodic benefit cost	(3)	(3)	1	4
Interest on regulatory balancing accounts, net	18	12	44	30
Sundry, net	(2)	0	(3)	(8)
Total	32	30	103	86
SoCalGas
Other Income [Line Items]
Allowance for equity funds used during construction	17	18	53	54
Non-service components of net periodic benefit cost	(28)	(16)	(34)	(12)
Interest on regulatory balancing accounts, net	11	14	26	38
Sundry, net	(3)	(3)	(8)	(7)
Total	$ (3)	$ 13	$ 37	$ 73