GENERAL INFORMATION AND OTHER FINANCIAL DATA - PENSION AND OTHER POSTRETIREMENT BENEFITS (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Defined Benefit Plan Disclosure [Line Items]
Partial termination, percentage reduction in active participants				20.00%
SDG&E | 62 Years Or Older
Defined Benefit Plan Disclosure [Line Items]
Years of service required for Health Reimbursement Account		5 years
SDG&E | Age 55 To 61
Defined Benefit Plan Disclosure [Line Items]
Years of service required for Health Reimbursement Account		10 years
SoCalGas | 62 Years Or Older
Defined Benefit Plan Disclosure [Line Items]
Years of service required for Health Reimbursement Account		5 years
SoCalGas | Age 55 To 61
Defined Benefit Plan Disclosure [Line Items]
Years of service required for Health Reimbursement Account		10 years
SoCalGas | Ages 65 Or Older
Defined Benefit Plan Disclosure [Line Items]
Years of service required for Health Reimbursement Account		5 years
SoCalGas | Ages 55 To 64
Defined Benefit Plan Disclosure [Line Items]
Years of service required for Health Reimbursement Account		15 years
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 32,000,000		$ 34,000,000	$ 96,000,000	$ 99,000,000
Interest cost	42,000,000		41,000,000	132,000,000	124,000,000
Expected return on assets	(41,000,000)		(40,000,000)	(130,000,000)	(131,000,000)
Amortization of:
Prior service cost (credit)	1,000,000		1,000,000	3,000,000	4,000,000
Actuarial loss (gain)	3,000,000		4,000,000	9,000,000	10,000,000
Settlement charges	12,000,000		0	16,000,000	9,000,000
Special termination benefits				0	0
Net periodic benefit cost (credit)	49,000,000		40,000,000	126,000,000	115,000,000
Regulatory adjustments	26,000,000		20,000,000	25,000,000	21,000,000
Total expense (income) recognized	75,000,000		60,000,000	151,000,000	136,000,000
Pension | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Service cost	10,000,000		10,000,000	29,000,000	29,000,000
Interest cost	11,000,000		10,000,000	35,000,000	32,000,000
Expected return on assets	(11,000,000)		(10,000,000)	(35,000,000)	(33,000,000)
Amortization of:
Actuarial loss (gain)	1,000,000		3,000,000	3,000,000	6,000,000
Special termination benefits				0	0
Net periodic benefit cost (credit)	11,000,000		13,000,000	32,000,000	34,000,000
Regulatory adjustments	2,000,000		0	(6,000,000)	(7,000,000)
Total expense (income) recognized	13,000,000		13,000,000	26,000,000	27,000,000
Pension | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Service cost	19,000,000		21,000,000	57,000,000	59,000,000
Interest cost	28,000,000		26,000,000	84,000,000	78,000,000
Expected return on assets	(30,000,000)		(29,000,000)	(89,000,000)	(90,000,000)
Amortization of:
Prior service cost (credit)	1,000,000		1,000,000	3,000,000	3,000,000
Actuarial loss (gain)	1,000,000		1,000,000	2,000,000	1,000,000
Settlement charges	6,000,000		0	10,000,000	0
Special termination benefits				0	0
Net periodic benefit cost (credit)	25,000,000		20,000,000	67,000,000	51,000,000
Regulatory adjustments	24,000,000		20,000,000	31,000,000	28,000,000
Total expense (income) recognized	49,000,000		40,000,000	98,000,000	79,000,000
PBOP
Defined Benefit Plan Disclosure [Line Items]
Health Reimbursement Account		$ 100,000
Service cost	3,000,000		4,000,000	10,000,000	11,000,000
Interest cost	10,000,000		9,000,000	29,000,000	27,000,000
Expected return on assets	(17,000,000)		(19,000,000)	(50,000,000)	(53,000,000)
Amortization of:
Prior service cost (credit)	(1,000,000)		(1,000,000)	(2,000,000)	(2,000,000)
Actuarial loss (gain)	(3,000,000)		(4,000,000)	(9,000,000)	(12,000,000)
Settlement charges	0		0	0	0
Special termination benefits				40,000,000	0
Net periodic benefit cost (credit)	(8,000,000)		(11,000,000)	18,000,000	(29,000,000)
Regulatory adjustments	8,000,000		10,000,000	(15,000,000)	28,000,000
Total expense (income) recognized	0		(1,000,000)	3,000,000	(1,000,000)
PBOP | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Service cost	0		0	1,000,000	2,000,000
Interest cost	2,000,000		3,000,000	6,000,000	6,000,000
Expected return on assets	(2,000,000)		(3,000,000)	(6,000,000)	(7,000,000)
Amortization of:
Actuarial loss (gain)	0		0	(1,000,000)	(1,000,000)
Special termination benefits				17,000,000	0
Net periodic benefit cost (credit)	0		0	17,000,000	0
Regulatory adjustments	0		0	(14,000,000)	0
Total expense (income) recognized	0		0	3,000,000	0
PBOP | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Service cost	2,000,000		3,000,000	7,000,000	8,000,000
Interest cost	7,000,000		7,000,000	22,000,000	21,000,000
Expected return on assets	(13,000,000)		(15,000,000)	(42,000,000)	(45,000,000)
Amortization of:
Prior service cost (credit)	(1,000,000)		(1,000,000)	(2,000,000)	(2,000,000)
Actuarial loss (gain)	(3,000,000)		(4,000,000)	(7,000,000)	(10,000,000)
Settlement charges	0		0	0	0
Special termination benefits				23,000,000	0
Net periodic benefit cost (credit)	(8,000,000)		(10,000,000)	1,000,000	(28,000,000)
Regulatory adjustments	8,000,000		10,000,000	(1,000,000)	28,000,000
Total expense (income) recognized	$ 0		$ 0	$ 0	$ 0