REVENUES - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 2,799	$ 2,700	$ 6,227	$ 6,381
Utilities regulatory revenues	(65)	41	(54)	(21)
Other revenues	263	259	479	442
Total revenues	2,997	3,000	6,652	6,802
SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,387	1,068	2,943	2,502
Utilities regulatory revenues	(19)	194	(28)	180
Total revenues	1,368	1,262	2,915	2,682
SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,233	1,421	2,941	3,489
Utilities regulatory revenues	(46)	(153)	(26)	(201)
Total revenues	1,187	1,268	2,915	3,288
Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,587	2,460	5,825	5,943
Utilities \| SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,387	1,068	2,943	2,502
Utilities \| SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,233	1,421	2,941	3,489
Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	212	240	402	438
Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,509	1,761	3,625	4,290
Gas \| SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	183	212	504	571
Gas \| SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,233	1,421	2,941	3,489
Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,290	939	2,602	2,091
Electric \| SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,204	856	2,439	1,931
Electric \| SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Operating Segments
Disaggregation of Revenue [Line Items]
Total revenues	3,023	3,020	6,697	6,847
Operating Segments \| Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,576	2,449	5,796	5,912
Utilities regulatory revenues	(65)	41	(54)	(21)
Other revenues	0	0	0	0
Total revenues	2,511	2,490	5,742	5,891
Operating Segments \| Sempra California \| Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,576	2,449	5,796	5,912
Operating Segments \| Sempra California \| Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Operating Segments \| Sempra California \| Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,376	1,596	3,364	3,988
Operating Segments \| Sempra California \| Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,200	853	2,432	1,924
Operating Segments \| Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	251	275	481	519
Utilities regulatory revenues	0	0	0	0
Other revenues	261	255	474	437
Total revenues	512	530	955	956
Operating Segments \| Sempra Infrastructure \| Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	18	18	45	44
Operating Segments \| Sempra Infrastructure \| Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	233	257	436	475
Operating Segments \| Sempra Infrastructure \| Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	140	173	275	315
Operating Segments \| Sempra Infrastructure \| Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	111	102	206	204
Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(28)	(24)	(50)	(50)
Utilities regulatory revenues	0	0	0	0
Other revenues	2	4	5	5
Total revenues	(26)	(20)	(45)	(45)
Consolidating adjustments and Parent and other \| Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(7)	(7)	(16)	(13)
Consolidating adjustments and Parent and other \| Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(21)	(17)	(34)	(37)
Consolidating adjustments and Parent and other \| Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(7)	(8)	(14)	(13)
Consolidating adjustments and Parent and other \| Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ (21)	$ (16)	$ (36)	$ (37)