REVENUES - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 14,848	$ 13,722	$ 11,676
Utilities regulatory revenues	75	633	451
Other revenues	1,797	84	730
Total revenues	16,720	14,439	12,857
Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	13,686	11,944	10,475
Utilities regulatory revenues	75	633	451
Other revenues	0	0	0
Total revenues	13,761	12,577	10,926
Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,251	1,849	1,246
Utilities regulatory revenues	0	0	0
Other revenues	1,820	70	751
Total revenues	3,071	1,919	1,997
Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(89)	(71)	(45)
Utilities regulatory revenues	0	0	0
Other revenues	(23)	14	(21)
Total revenues	(112)	(57)	(66)
SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	5,954	5,586	5,144
Utilities regulatory revenues	(357)	252	360
Total revenues	5,597	5,838	5,504
SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	7,857	6,459	5,424
Utilities regulatory revenues	432	381	91
Total revenues	8,289	6,840	5,515
Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	13,754	12,018	10,540
Utilities | Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	13,686	11,944	10,475
Utilities | Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	87	89	81
Utilities | Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(19)	(15)	(16)
Utilities | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	5,954	5,586	5,144
Utilities | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	7,857	6,459	5,424
Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,094	1,704	1,136
Energy-related businesses | Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0
Energy-related businesses | Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,164	1,760	1,165
Energy-related businesses | Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(70)	(56)	(29)
Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	9,687	8,525	6,969
Gas | Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	8,949	7,267	6,128
Gas | Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	755	1,270	856
Gas | Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(17)	(12)	(15)
Gas | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,204	899	790
Gas | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	7,857	6,459	5,424
Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	5,161	5,197	4,707
Electric | Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	4,737	4,677	4,347
Electric | Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	496	579	390
Electric | Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(72)	(59)	(30)
Electric | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	4,750	4,687	4,354
Electric | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 0	$ 0	$ 0