REVENUES - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 2,756	$ 2,569	$ 9,137	$ 8,750
Utilities regulatory revenues	95	(138)	74	(107)
Other revenues	300	345	742	784
Total revenues	3,151	2,776	9,953	9,427
SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,349	1,327	3,851	3,836
Utilities regulatory revenues	131	(84)	311	141
Total revenues	1,480	1,243	4,162	3,977
SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,217	1,110	4,706	4,416
Utilities regulatory revenues	(36)	(56)	(237)	(248)
Total revenues	1,181	1,054	4,469	4,168
Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,528	2,402	8,471	8,174
Utilities | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,349	1,327	3,851	3,836
Utilities | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,217	1,110	4,706	4,416
Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	228	167	666	576
Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,543	1,314	5,833	5,302
Gas | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	218	167	789	658
Gas | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,217	1,110	4,706	4,416
Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,213	1,255	3,304	3,448
Electric | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,131	1,160	3,062	3,178
Electric | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Operating Segments
Disaggregation of Revenue [Line Items]
Total revenues	3,168	2,794	10,015	9,488
Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,518	2,394	8,430	8,129
Utilities regulatory revenues	95	(138)	74	(107)
Other revenues	0	0	0	0
Total revenues	2,613	2,256	8,504	8,022
Operating Segments | Sempra California | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,518	2,394	8,430	8,129
Operating Segments | Sempra California | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Operating Segments | Sempra California | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,390	1,237	5,378	4,961
Operating Segments | Sempra California | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,128	1,157	3,052	3,168
Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	256	194	775	688
Utilities regulatory revenues	0	0	0	0
Other revenues	299	344	736	778
Total revenues	555	538	1,511	1,466
Operating Segments | Sempra Infrastructure | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	15	15	59	63
Operating Segments | Sempra Infrastructure | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	241	179	716	625
Operating Segments | Sempra Infrastructure | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	156	83	471	356
Operating Segments | Sempra Infrastructure | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	100	111	304	332
Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(18)	(19)	(68)	(67)
Utilities regulatory revenues	0	0	0	0
Other revenues	1	1	6	6
Total revenues	(17)	(18)	(62)	(61)
Consolidating adjustments and Parent and other | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(5)	(7)	(18)	(18)
Consolidating adjustments and Parent and other | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(13)	(12)	(50)	(49)
Consolidating adjustments and Parent and other | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(3)	(6)	(16)	(15)
Consolidating adjustments and Parent and other | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ (15)	$ (13)	$ (52)	$ (52)