SEGMENT INFORMATION - Reconciliation of Earnings Attributable To Common Shares (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Segment Reporting, Revenue Reconciling Item [Line Items]
Electric	$ 1,224	$ 1,059
Natural gas	2,025	2,362
Revenues from contracts with customers	3,428	3,681
Operation and maintenance	(1,242)	(1,343)
Interest income	40	34
Interest expense	(382)	(433)
Net income, income tax (expense) benefit	(65)	(57)
Earnings attributable to common shares	1,037	906
Capital expenditures for property, plant and equipment	2,461	2,336
SDG&E
Segment Reporting, Revenue Reconciling Item [Line Items]
Electric	1,228	1,064
Natural gas	319	356
Revenues from contracts with customers	1,556	1,434
Total operating revenues	1,547	1,420
Depreciation and amortization	(344)	(320)
Interest income	1	0
Interest expense	(147)	(135)
Net income, income tax (expense) benefit	(69)	(14)
Earnings attributable to common shares	296	281
SDG&E | Reportable Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Electric	1,235	1,075
Natural gas	321	359
Revenues from contracts with customers	1,556	1,434
Total other revenues	(9)	(14)
Total operating revenues	1,547	1,420
Operation and maintenance	(423)	(440)
Depreciation and amortization	(344)	(320)
Interest income	1	0
Interest expense	(147)	(135)
Net income, income tax (expense) benefit	(69)	(14)
Other segment items	(269)	(230)
Earnings attributable to common shares	296	281
Capital expenditures for property, plant and equipment	486	539
SDG&E | Electric, Non-Nuclear | Reportable Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Utilities	(7)	(11)
SDG&E | Natural gas | Reportable Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Utilities	(2)	(3)
SoCalGas
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues from contracts with customers	1,708	2,068
Total operating revenues	1,728	2,020
Depreciation and amortization	(273)	(242)
Interest income	1	2
Interest expense	(97)	(90)
Net income, income tax (expense) benefit	(20)	(38)
Earnings attributable to common shares	424	443
SoCalGas | Reportable Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Natural gas	1,708	2,068
Total other revenues	20	(48)
Total operating revenues	1,728	2,020
Operation and maintenance	(621)	(757)
Depreciation and amortization	(273)	(242)
Interest income	1	2
Interest expense	(97)	(90)
Net income, income tax (expense) benefit	(20)	(38)
Other segment items	(294)	(452)
Earnings attributable to common shares	424	443
Capital expenditures for property, plant and equipment	$ 481	$ 555