REVENUES - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 2,700	$ 2,484	$ 6,381	$ 6,181
Utilities regulatory revenues	41	369	(21)	31
Other revenues	259	158	442	439
Total revenues	3,000	3,011	6,802	6,651
SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,068	1,047	2,502	2,509
Utilities regulatory revenues	194	308	180	225
Total revenues	1,262	1,355	2,682	2,734
SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,421	1,246	3,489	3,306
Utilities regulatory revenues	(153)	63	(201)	(192)
Total revenues	1,268	1,309	3,288	3,114
Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,460	2,269	5,943	5,772
Utilities \| SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,068	1,047	2,502	2,509
Utilities \| SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,421	1,246	3,489	3,306
Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	240	215	438	409
Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,761	1,518	4,290	3,988
Gas \| SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	212	161	571	491
Gas \| SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,421	1,246	3,489	3,306
Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	939	966	2,091	2,193
Electric \| SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	856	886	1,931	2,018
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	3,020	3,034	6,847	6,694
Operating Segments \| Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,449	2,256	5,912	5,735
Utilities regulatory revenues	41	369	(21)	31
Other revenues	0	0	0	0
Total revenues	2,490	2,625	5,891	5,766
Operating Segments \| Sempra California \| Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,449	2,256	5,912	5,735
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	1,596	1,374	3,988	3,724
Operating Segments \| Sempra California \| Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	853	882	1,924	2,011
Operating Segments \| Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	275	252	519	494
Utilities regulatory revenues	0	0	0	0
Other revenues	255	157	437	434
Total revenues	530	409	956	928
Operating Segments \| Sempra Infrastructure \| Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	18	18	44	48
Operating Segments \| Sempra Infrastructure \| Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	257	234	475	446
Operating Segments \| Sempra Infrastructure \| Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	173	148	315	273
Operating Segments \| Sempra Infrastructure \| Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	102	104	204	221
Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(24)	(24)	(50)	(48)
Utilities regulatory revenues	0	0	0	0
Other revenues	4	1	5	5
Total revenues	(20)	(23)	(45)	(43)
Consolidating adjustments and Parent and other \| Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(7)	(5)	(13)	(11)
Consolidating adjustments and Parent and other \| Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(17)	(19)	(37)	(37)
Consolidating adjustments and Parent and other \| Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(8)	(4)	(13)	(9)
Consolidating adjustments and Parent and other \| Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ (16)	$ (20)	$ (37)	$ (39)