SEGMENT INFORMATION - Schedule of Segment Information Income Statement and Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Revenues from External Customers and Long-Lived Assets [Line Items]
Equity earnings, before income tax	$ 148	$ 141
Equity earnings	367	325
CAPITAL EXPENDITURES FOR PROPERTY, PLANT AND EQUIPMENT	2,461	2,336
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 contingently redeemable noncontrolling interest	(6)	0
Earnings attributable to common shares	1,037	906
Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Equity earnings, before income tax	148	141
Equity earnings, net of tax	219	184
CAPITAL EXPENDITURES FOR PROPERTY, PLANT AND EQUIPMENT	2,460	2,335
Earnings attributable to common shares	1,153	1,016
Operating Segments | Sempra California
Revenues from External Customers and Long-Lived Assets [Line Items]
Equity earnings
CAPITAL EXPENDITURES FOR PROPERTY, PLANT AND EQUIPMENT	967	1,094
Revenues	3,231	3,401
Operation and maintenance	(1,016)	(1,175)
Depreciation and amortization	(617)	(562)
Interest income	2	2
Interest expense	(244)	(225)
Net income, income tax (expense) benefit	(89)	(52)
Earnings attributable to noncontrolling interests
Earnings attributable to contingently redeemable noncontrolling interest
Other segment items	(547)	(665)
Earnings attributable to common shares	720	724
Operating Segments | Sempra Texas Utilities
Revenues from External Customers and Long-Lived Assets [Line Items]
Equity earnings, before income tax	2	2
Equity earnings, net of tax	171	146
Equity earnings	173	148
Earnings attributable to noncontrolling interests
Earnings attributable to contingently redeemable noncontrolling interest
Other segment items	(2)	(2)
Earnings attributable to common shares	171	146
Operating Segments | Sempra Infrastructure
Revenues from External Customers and Long-Lived Assets [Line Items]
Equity earnings, before income tax	146	139
Equity earnings, net of tax	48	38
Equity earnings	194	177
CAPITAL EXPENDITURES FOR PROPERTY, PLANT AND EQUIPMENT	1,493	1,241
Revenues	443	426
Operation and maintenance	(221)	(174)
Depreciation and amortization	(3)	(76)
Interest income	33	19
Interest expense	10	(77)
Net income, income tax (expense) benefit	(14)	(22)
Earnings attributable to noncontrolling interests	(107)	(2)
Earnings attributable to contingently redeemable noncontrolling interest	(6)
Other segment items	(67)	(125)
Earnings attributable to common shares	262	146
Earnings attributable to common shares
Revenues from External Customers and Long-Lived Assets [Line Items]
CAPITAL EXPENDITURES FOR PROPERTY, PLANT AND EQUIPMENT	1	1
Earnings attributable to common shares	$ (116)	$ (110)