GENERAL INFORMATION AND OTHER FINANCIAL DATA - OTHER INCOME (EXPENSE), NET (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Other Income [Line Items]
Allowance for equity funds used during construction	$ 37	$ 33
Investment gains, net	16	12
Gains on interest rate and foreign exchange instruments, net	0	5
Foreign currency transaction gains, net	1	1
Non-service components of net periodic benefit cost	28	(25)
Interest on regulatory balancing accounts, net	18	18
Sundry, net	(1)	(3)
Total	99	41
SDG&E
Other Income [Line Items]
Allowance for equity funds used during construction	20	23
Non-service components of net periodic benefit cost	10	(4)
Interest on regulatory balancing accounts, net	7	10
Sundry, net	(4)	(1)
Total	33	28
SoCalGas
Other Income [Line Items]
Allowance for equity funds used during construction	17	10
Non-service components of net periodic benefit cost	21	(19)
Interest on regulatory balancing accounts, net	11	8
Sundry, net	(2)	(7)
Total	$ 47	$ (8)