REVENUES - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 3,681	$ 3,697
Utilities regulatory revenues	(62)	(338)
Other revenues	183	281
Total revenues	3,802	3,640
SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,434	1,462
Utilities regulatory revenues	(14)	(83)
Total revenues	1,420	1,379
SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,068	2,060
Utilities regulatory revenues	(48)	(255)
Total revenues	2,020	1,805
Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,483	3,503
Utilities | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,434	1,462
Utilities | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,068	2,060
Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	198	194
Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,529	2,470
Gas | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	359	330
Gas | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,068	2,060
Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,152	1,227
Electric | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,075	1,132
Electric | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0
Operating Segments
Disaggregation of Revenue [Line Items]
Total revenues	3,827	3,660
Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,463	3,479
Utilities regulatory revenues	(62)	(338)
Other revenues	0	0
Total revenues	3,401	3,141
Operating Segments | Sempra California | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,463	3,479
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	2,392	2,350
Operating Segments | Sempra California | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,071	1,129
Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	244	242
Utilities regulatory revenues	0	0
Other revenues	182	277
Total revenues	426	519
Operating Segments | Sempra Infrastructure | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	26	30
Operating Segments | Sempra Infrastructure | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	218	212
Operating Segments | Sempra Infrastructure | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	142	125
Operating Segments | Sempra Infrastructure | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	102	117
Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(26)	(24)
Utilities regulatory revenues	0	0
Other revenues	1	4
Total revenues	(25)	(20)
Consolidating adjustments and Parent and other | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(6)	(6)
Consolidating adjustments and Parent and other | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(20)	(18)
Consolidating adjustments and Parent and other | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(5)	(5)
Consolidating adjustments and Parent and other | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ (21)	$ (19)