REVENUES - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 11,818	$ 14,848	$ 13,722
Utilities regulatory revenues	374	75	633
Other revenues	993	1,797	84
Total revenues	13,185	16,720	14,439
Operating Segments
Disaggregation of Revenue [Line Items]
Total revenues	13,264	16,832	14,496
Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	11,008	13,686	11,944
Utilities regulatory revenues	374	75	633
Other revenues	0	0	0
Total revenues	11,382	13,761	12,577
Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	896	1,251	1,849
Utilities regulatory revenues	0	0	0
Other revenues	986	1,820	70
Total revenues	1,882	3,071	1,919
Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(86)	(89)	(71)
Utilities regulatory revenues	0	0	0
Other revenues	7	(23)	14
Total revenues	(79)	(112)	(57)
SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	5,042	5,954	5,586
Utilities regulatory revenues	299	(357)	252
Total revenues	5,341	5,597	5,838
SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	6,134	7,857	6,459
Utilities regulatory revenues	75	432	381
Total revenues	6,209	8,289	6,840
Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	11,063	13,754	12,018
Utilities | Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	11,008	13,686	11,944
Utilities | Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	78	87	89
Utilities | Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(23)	(19)	(15)
Utilities | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	5,042	5,954	5,586
Utilities | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	6,134	7,857	6,459
Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	755	1,094	1,704
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	818	1,164	1,760
Energy-related businesses | Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(63)	(70)	(56)
Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	7,308	9,687	8,525
Gas | Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	6,858	8,949	7,267
Gas | Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	471	755	1,270
Gas | Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(21)	(17)	(12)
Gas | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	878	1,204	899
Gas | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	6,134	7,857	6,459
Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	4,510	5,161	5,197
Electric | Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	4,150	4,737	4,677
Electric | Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	425	496	579
Electric | Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(65)	(72)	(59)
Electric | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	4,164	4,750	4,687
Electric | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 0	$ 0	$ 0