REVENUES - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 2,892	$ 3,033	$ 8,781	$ 6,722
Utilities regulatory revenues	38	303	(121)	328
Other revenues	405	211	1,235	317
Total revenues	3,335	3,547	9,895	7,367
Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,676	2,590	8,274	6,002
Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	216	443	507	720
Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,680	1,827	6,244	4,272
Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,212	1,206	2,537	2,450
Operating Segments | San Diego Gas and Electric Company
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,400	1,250	3,165	2,751
Utilities regulatory revenues	(138)	149	(250)	93
Other revenues	0	0	0	0
Total revenues	1,262	1,399	2,915	2,844
Operating Segments | San Diego Gas and Electric Company | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,400	1,250	3,165	2,751
Operating Segments | San Diego Gas and Electric Company | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Operating Segments | San Diego Gas and Electric Company | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	252	159	806	489
Operating Segments | San Diego Gas and Electric Company | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,148	1,091	2,359	2,262
Operating Segments | Southern California Gas Company
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,291	1,347	5,132	3,259
Utilities regulatory revenues	176	154	129	235
Other revenues	0	0	0	0
Total revenues	1,467	1,501	5,261	3,494
Operating Segments | Southern California Gas Company | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,291	1,347	5,132	3,259
Operating Segments | Southern California Gas Company | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Operating Segments | Southern California Gas Company | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,291	1,347	5,132	3,259
Operating Segments | Southern California Gas Company | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	254	477	596	797
Utilities regulatory revenues	0	0	0	0
Other revenues	406	212	1,260	316
Total revenues	660	689	1,856	1,113
Operating Segments | Sempra Infrastructure | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	19	20	49	48
Operating Segments | Sempra Infrastructure | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	235	457	547	749
Operating Segments | Sempra Infrastructure | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	167	340	371	569
Operating Segments | Sempra Infrastructure | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	87	137	225	228
Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(53)	(41)	(112)	(85)
Utilities regulatory revenues	0	0	0	0
Other revenues	(1)	(1)	(25)	1
Total revenues	(54)	(42)	(137)	(84)
Consolidation, Eliminations | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(34)	(27)	(72)	(56)
Consolidation, Eliminations | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(19)	(14)	(40)	(29)
Consolidation, Eliminations | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(30)	(19)	(65)	(45)
Consolidation, Eliminations | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ (23)	$ (22)	$ (47)	$ (40)