GENERAL INFORMATION AND OTHER FINANCIAL DATA - PENSION AND OTHER POSTRETIREMENT BENEFITS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 33	$ 29	$ 65	$ 57
Interest cost	41	39	83	79
Expected return on assets	(46)	(42)	(91)	(85)
Amortization of:
Prior service cost	2	1	3	2
Actuarial loss (gain)	3	2	6	4
Settlement charges	9	0	9	0
Net periodic benefit cost (credit)	42	29	75	57
Regulatory adjustments	26	29	1	58
Total expense recognized	68	58	76	115
Pension | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Service cost	9	8	19	16
Interest cost	11	10	22	20
Expected return on assets	(11)	(10)	(23)	(20)
Amortization of:
Actuarial loss (gain)	1	1	3	2
Net periodic benefit cost (credit)	10	9	21	18
Regulatory adjustments	3	4	(7)	8
Total expense recognized	13	13	14	26
Pension | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Service cost	19	17	38	34
Interest cost	26	26	52	51
Expected return on assets	(31)	(31)	(61)	(60)
Amortization of:
Prior service cost	1	1	2	2
Actuarial loss (gain)	0	0	0	0
Net periodic benefit cost (credit)	15	13	31	27
Regulatory adjustments	23	25	8	50
Total expense recognized	38	38	39	77
PBOP
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	3	7	7
Interest cost	9	10	18	19
Expected return on assets	(17)	(18)	(34)	(35)
Amortization of:
Prior service cost	0	0	(1)	(1)
Actuarial loss (gain)	(4)	(6)	(8)	(12)
Settlement charges	0	0	0	0
Net periodic benefit cost (credit)	(9)	(11)	(18)	(22)
Regulatory adjustments	9	11	18	22
Total expense recognized	0	0	0	0
PBOP | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	0	2	1
Interest cost	1	2	3	4
Expected return on assets	(1)	(2)	(4)	(4)
Amortization of:
Actuarial loss (gain)	(1)	0	(1)	(1)
Net periodic benefit cost (credit)	0	0	0	0
Regulatory adjustments	0	0	0	0
Total expense recognized	0	0	0	0
PBOP | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2	5	5
Interest cost	7	7	14	14
Expected return on assets	(15)	(15)	(30)	(30)
Amortization of:
Prior service cost	0	0	(1)	(1)
Actuarial loss (gain)	(3)	(5)	(6)	(10)
Net periodic benefit cost (credit)	(9)	(11)	(18)	(22)
Regulatory adjustments	9	11	18	22
Total expense recognized	$ 0	$ 0	$ 0	$ 0