REVENUES - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 2,569	$ 2,894	$ 8,750	$ 11,675
Utilities regulatory revenues	(138)	197	(107)	76
Other revenues	345	243	784	1,478
Total revenues	2,776	3,334	9,427	13,229
SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,327	1,438	3,836	4,603
Utilities regulatory revenues	(84)	4	141	(246)
Total revenues	1,243	1,442	3,977	4,357
SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,110	1,120	4,416	6,252
Utilities regulatory revenues	(56)	193	(248)	322
Total revenues	1,054	1,313	4,168	6,574
Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,402	2,541	8,174	10,815
Utilities | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,327	1,438	3,836	4,603
Utilities | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,110	1,120	4,416	6,252
Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	167	353	576	860
Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,314	1,506	5,302	7,750
Gas | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	167	182	658	988
Gas | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,110	1,120	4,416	6,252
Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,255	1,388	3,448	3,925
Electric | SDG&E
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,160	1,256	3,178	3,615
Electric | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Operating Segments | Sempra California
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,394	2,528	8,129	10,764
Utilities regulatory revenues	(138)	197	(107)	76
Other revenues	0	0	0	0
Total revenues	2,256	2,725	8,022	10,840
Operating Segments | Sempra California | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,394	2,528	8,129	10,764
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	1,237	1,275	4,961	7,158
Operating Segments | Sempra California | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,157	1,253	3,168	3,606
Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	194	387	688	983
Utilities regulatory revenues	0	0	0	0
Other revenues	344	242	778	1,502
Total revenues	538	629	1,466	2,485
Operating Segments | Sempra Infrastructure | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	15	18	63	67
Operating Segments | Sempra Infrastructure | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	179	369	625	916
Operating Segments | Sempra Infrastructure | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	83	234	356	605
Operating Segments | Sempra Infrastructure | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	111	153	332	378
Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(19)	(21)	(67)	(72)
Utilities regulatory revenues	0	0	0	0
Other revenues	1	1	6	(24)
Total revenues	(18)	(20)	(61)	(96)
Consolidating adjustments and Parent and other | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(7)	(5)	(18)	(16)
Consolidating adjustments and Parent and other | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(12)	(16)	(49)	(56)
Consolidating adjustments and Parent and other | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(6)	(3)	(15)	(13)
Consolidating adjustments and Parent and other | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ (13)	$ (18)	$ (52)	$ (59)