SEGMENT INFORMATION - Reconciliation of Earnings Attributable To Common Shares (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting, Revenue Reconciling Item [Line Items]
Electric	$ 1,260	$ 1,069	$ 3,350	$ 3,269
Natural gas	1,363	1,195	5,195	4,798
Revenues from contracts with customers	2,756	2,569	9,137	8,750
Interest income	17	17	65	47
Interest expense	(403)	(328)	(1,195)	(944)
Net income, income tax (expense) benefit	(482)	105	(711)	63
Earnings attributable to common shares	77	638	1,444	2,152
Capital expenditures for property, plant and equipment			7,201	5,765
SDG&E
Segment Reporting, Revenue Reconciling Item [Line Items]
Electric	1,264	1,073	3,362	3,282
Natural gas	216	170	800	695
Revenues from contracts with customers	1,349	1,327	3,851	3,836
Operating revenues	1,480	1,243	4,162	3,977
Depreciation and amortization	(334)	(308)	(977)	(910)
Interest income	0	1	2	5
Interest expense	(141)	(131)	(415)	(390)
Net income, income tax (expense) benefit	33	(15)	12	(89)
Earnings attributable to common shares	324	261	780	670
SDG&E | Reportable Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Electric	1,131	1,160	3,062	3,178
Natural gas	218	167	789	658
Revenues from contracts with customers	1,349	1,327	3,851	3,836
Total regulatory revenues	131	(84)	311	141
Operating revenues	1,480	1,243	4,162	3,977
Depreciation and amortization	(334)	(308)	(977)	(910)
Interest income	0	1	2	5
Interest expense	(141)	(131)	(415)	(390)
Net income, income tax (expense) benefit	33	(15)	12	(89)
Other segment items	(714)	(529)	(2,004)	(1,923)
Earnings attributable to common shares	324	261	780	670
Capital expenditures for property, plant and equipment			1,811	1,838
SDG&E | Electric, Non-Nuclear | Reportable Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Utilities	132	(87)	300	104
SDG&E | Natural gas | Reportable Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Utilities	(1)	3	11	37
SoCalGas
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues from contracts with customers	1,217	1,110	4,706	4,416
Operating revenues	1,181	1,054	4,469	4,168
Depreciation and amortization	(257)	(228)	(750)	(675)
Interest income	2	3	5	7
Interest expense	(93)	(82)	(272)	(237)
Net income, income tax (expense) benefit	95	52	51	(1)
Earnings attributable to common shares	46	(14)	573	475
SoCalGas | Reportable Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Natural gas	1,217	1,110	4,706	4,416
Total regulatory revenues	(36)	(56)	(237)	(248)
Operating revenues	1,181	1,054	4,469	4,168
Depreciation and amortization	(257)	(228)	(750)	(675)
Interest income	2	3	5	7
Interest expense	(93)	(82)	(272)	(237)
Net income, income tax (expense) benefit	95	52	51	(1)
Other segment items	(882)	(813)	(2,930)	(2,787)
Earnings attributable to common shares	$ 46	$ (14)	573	475
Capital expenditures for property, plant and equipment			$ 1,523	$ 1,491