SEGMENT INFORMATION - Reconciliation of Earnings Attributable To Common Shares (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting, Revenue Reconciling Item [Line Items]
Electric	$ 1,059	$ 1,056
Natural gas	2,362	2,109
Revenues from contracts with customers	3,681	3,697
Interest income	34	13
Interest expense	(433)	(305)
Income tax (expense) benefit	(57)	(172)
Earnings attributable to common shares	906	801
CAPITAL EXPENDITURES FOR PROPERTY, PLANT AND EQUIPMENT	2,336	1,933
SDG&E
Segment Reporting, Revenue Reconciling Item [Line Items]
Electric	1,064	1,060
Natural gas	356	319
Revenues from contracts with customers	1,434	1,462
Operating revenues	1,420	1,379
Depreciation and amortization	(320)	(298)
Interest income	0	1
Interest expense	(135)	(128)
Income tax (expense) benefit	(14)	(40)
Earnings attributable to common shares	281	223
SDG&E | Reportable Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Electric	1,075	1,132
Natural gas	359	330
Revenues from contracts with customers	1,434	1,462
Total regulatory revenues	(14)	(83)
Operating revenues	1,420	1,379
Depreciation and amortization	(320)	(298)
Interest income	0	1
Interest expense	(135)	(128)
Income tax (expense) benefit	(14)	(40)
Other segment items	(670)	(691)
Earnings attributable to common shares	281	223
CAPITAL EXPENDITURES FOR PROPERTY, PLANT AND EQUIPMENT	539	624
SDG&E | Natural Gas | Reportable Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Utilities	(3)	(11)
SDG&E | Electric, Non-Nuclear | Reportable Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Utilities	(11)	(72)
SoCalGas
Segment Reporting, Revenue Reconciling Item [Line Items]
Natural gas		2,060
Revenues from contracts with customers	2,068	2,060
Total regulatory revenues		(255)
Operating revenues	2,020	1,805
Depreciation and amortization	(242)	(223)
Interest income	2	2
Interest expense	(90)	(77)
Income tax (expense) benefit	(38)	(43)
Other segment items		(1,105)
Earnings attributable to common shares	443	359
CAPITAL EXPENDITURES FOR PROPERTY, PLANT AND EQUIPMENT		$ 519
SoCalGas | Reportable Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Natural gas	2,068
Total regulatory revenues	(48)
Operating revenues	2,020
Depreciation and amortization	(242)
Interest income	2
Interest expense	(90)
Income tax (expense) benefit	(38)
Other segment items	(1,209)
Earnings attributable to common shares	443
CAPITAL EXPENDITURES FOR PROPERTY, PLANT AND EQUIPMENT	$ 555