REVENUES - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 3,428	$ 3,681
Utilities regulatory revenues	11	(62)
Other revenues	216	183
Total revenues	3,655	3,802
SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,556	1,434
Utilities regulatory revenues	(9)	(14)
Total revenues	1,547	1,420
SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,708	2,068
Utilities regulatory revenues	20	(48)
Total revenues	1,728	2,020
Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,238	3,483
Utilities | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,556	1,434
Utilities | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,708	2,068
Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	190	198
Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,116	2,529
Gas | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	321	359
Gas | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,708	2,068
Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,312	1,152
Electric | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,235	1,075
Electric | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0
Operating Segments
Disaggregation of Revenue [Line Items]
Total revenues	3,674	3,827
Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,220	3,463
Utilities regulatory revenues	11	(62)
Other revenues	0	0
Total revenues	3,231	3,401
Operating Segments | Sempra California | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,220	3,463
Operating Segments | Sempra California | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0
Operating Segments | Sempra California | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,988	2,392
Operating Segments | Sempra California | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,232	1,071
Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	230	244
Utilities regulatory revenues	0	0
Other revenues	213	182
Total revenues	443	426
Operating Segments | Sempra Infrastructure | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	27	26
Operating Segments | Sempra Infrastructure | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	203	218
Operating Segments | Sempra Infrastructure | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	135	142
Operating Segments | Sempra Infrastructure | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	95	102
Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(22)	(26)
Utilities regulatory revenues	0	0
Other revenues	3	1
Total revenues	(19)	(25)
Consolidating adjustments and Parent and other | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(9)	(6)
Consolidating adjustments and Parent and other | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(13)	(20)
Consolidating adjustments and Parent and other | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(7)	(5)
Consolidating adjustments and Parent and other | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ (15)	$ (21)