REVENUES - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 12,418	$ 11,818	$ 14,848
Utilities regulatory revenues	364	374	75
Other revenues	920	993	1,797
Total revenues	13,702	13,185	16,720
Operating Segments
Disaggregation of Revenue [Line Items]
Total revenues	13,783	13,264	16,832
Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	11,454	11,008	13,686
Utilities regulatory revenues	364	374	75
Other revenues	0	0	0
Total revenues	11,818	11,382	13,761
Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,052	896	1,251
Utilities regulatory revenues	0	0	0
Other revenues	913	986	1,820
Total revenues	1,965	1,882	3,071
Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(88)	(86)	(89)
Utilities regulatory revenues	0	0	0
Other revenues	7	7	(23)
Total revenues	(81)	(79)	(112)
SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	5,165	5,042	5,954
Utilities regulatory revenues	532	299	(357)
Total revenues	5,697	5,341	5,597
SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	6,459	6,134	7,857
Utilities regulatory revenues	(168)	75	432
Total revenues	6,291	6,209	8,289
Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	11,507	11,063	13,754
Utilities | Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	11,454	11,008	13,686
Utilities | Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	78	78	87
Utilities | Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(25)	(23)	(19)
Utilities | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	5,165	5,042	5,954
Utilities | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	6,459	6,134	7,857
Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	911	755	1,094
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	974	818	1,164
Energy-related businesses | Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(63)	(63)	(70)
Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	7,965	7,308	9,687
Gas | Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	7,345	6,858	8,949
Gas | Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	642	471	755
Gas | Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(22)	(21)	(17)
Gas | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,043	878	1,204
Gas | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	6,459	6,134	7,857
Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	4,453	4,510	5,161
Electric | Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	4,109	4,150	4,737
Electric | Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	410	425	496
Electric | Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(66)	(65)	(72)
Electric | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	4,122	4,164	4,750
Electric | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 0	$ 0	$ 0