EMPLOYEE BENEFIT PLANS - NET PERIODIC BENEFIT COST AND AMOUNTS RECOGNIZED IN OCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Plan
NET PERIODIC BENEFIT COST
Service cost	$ 109	$ 146	$ 145
Interest cost	157	118	112
Expected return on assets	(169)	(183)	(173)
Prior service cost (credit)	5	10	11
Actuarial loss (gain)	10	25	45
Settlement charges	0	28	38
Net periodic benefit cost (credit)	112	144	178
Regulatory adjustment	117	84	57
Total expense (income) recognized	229	228	235
CHANGES IN PLAN ASSETS AND BENEFIT OBLIGATIONS RECOGNIZED IN OCI
Net loss (gain)	42	12	(5)
Prior service cost	4	0	0
Amortization of actuarial (loss) gain	(5)	(8)	(8)
Amortization of prior service cost	(2)	(4)	(4)
Settlements	0	0	(7)
Total recognized in OCI	39	0	(24)
Total recognized in net periodic benefit cost and OCI	268	228	211
Pension Plan | SDG&E
NET PERIODIC BENEFIT COST
Service cost	32	37	35
Interest cost	40	26	25
Expected return on assets	(39)	(46)	(50)
Prior service cost (credit)	1	1	1
Actuarial loss (gain)	4	1	2
Settlement charges	0	14	6
Net periodic benefit cost (credit)	38	33	19
Regulatory adjustment	15	20	34
Total expense (income) recognized	53	53	53
CHANGES IN PLAN ASSETS AND BENEFIT OBLIGATIONS RECOGNIZED IN OCI
Net loss (gain)	3	(3)	1
Amortization of actuarial (loss) gain	0	(1)	0
Amortization of prior service cost	(1)	0	(1)
Total recognized in OCI	2	(4)	0
Total recognized in net periodic benefit cost and OCI	55	49	53
Pension Plan | SoCalGas
NET PERIODIC BENEFIT COST
Service cost	65	96	97
Interest cost	101	81	78
Expected return on assets	(119)	(126)	(113)
Prior service cost (credit)	4	8	8
Actuarial loss (gain)	1	18	36
Settlement charges	0	14	25
Net periodic benefit cost (credit)	52	91	131
Regulatory adjustment	102	64	23
Total expense (income) recognized	154	155	154
CHANGES IN PLAN ASSETS AND BENEFIT OBLIGATIONS RECOGNIZED IN OCI
Net loss (gain)	2	(5)	2
Amortization of actuarial (loss) gain	(1)	(2)	(1)
Amortization of prior service cost	(1)	(1)	(1)
Total recognized in OCI	0	(8)	0
Total recognized in net periodic benefit cost and OCI	154	147	154
Other Postretirement Benefits Plan
NET PERIODIC BENEFIT COST
Service cost	13	23	23
Interest cost	37	28	28
Expected return on assets	(69)	(64)	(61)
Prior service cost (credit)	(2)	(2)	(2)
Actuarial loss (gain)	(23)	(15)	(9)
Settlement charges	0	0	0
Net periodic benefit cost (credit)	(44)	(30)	(21)
Regulatory adjustment	43	30	21
Total expense (income) recognized	(1)	0	0
CHANGES IN PLAN ASSETS AND BENEFIT OBLIGATIONS RECOGNIZED IN OCI
Net loss (gain)	(2)	(4)	(4)
Prior service cost	0	0	0
Amortization of actuarial (loss) gain	2	1	0
Amortization of prior service cost	0	0	0
Settlements	0	0	0
Total recognized in OCI	0	(3)	(4)
Total recognized in net periodic benefit cost and OCI	(1)	(3)	(4)
Other Postretirement Benefits Plan | SDG&E
NET PERIODIC BENEFIT COST
Service cost	3	5	5
Interest cost	8	6	5
Expected return on assets	(8)	(10)	(10)
Prior service cost (credit)	0	0	0
Actuarial loss (gain)	(2)	(2)	(2)
Settlement charges	0	0	0
Net periodic benefit cost (credit)	1	(1)	(2)
Regulatory adjustment	0	1	2
Total expense (income) recognized	1	0	0
Other Postretirement Benefits Plan | SoCalGas
NET PERIODIC BENEFIT COST
Service cost	9	17	17
Interest cost	28	21	22
Expected return on assets	(59)	(53)	(48)
Prior service cost (credit)	(2)	(2)	(3)
Actuarial loss (gain)	(19)	(12)	(7)
Settlement charges	0	0	0
Net periodic benefit cost (credit)	(43)	(29)	(19)
Regulatory adjustment	43	29	19
Total expense (income) recognized	$ 0	$ 0	$ 0