GENERAL INFORMATION AND OTHER FINANCIAL DATA - OTHER INCOME (EXPENSE), NET (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Other Income [Line Items]
Allowance for equity funds used during construction	$ 42	$ 41
Investment gains, net	1	2
Gains on foreign exchange instruments, net	9	0
Foreign currency transaction (losses) gains, net	(1)	4
Non-service components of net periodic benefit cost	29	23
Interest on regulatory balancing accounts, net	19	21
Sundry, net	1	0
Total	100	91
SDG&E
Other Income [Line Items]
Allowance for equity funds used during construction	17	19
Non-service components of net periodic benefit cost	11	9
Interest on regulatory balancing accounts, net	12	11
Sundry, net	(2)	1
Total	38	40
SoCalGas
Other Income [Line Items]
Allowance for equity funds used during construction	15	18
Non-service components of net periodic benefit cost	21	17
Interest on regulatory balancing accounts, net	7	10
Sundry, net	0	(3)
Total	$ 43	$ 42