REVENUES - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 13,722	$ 11,676	$ 10,310
Utilities regulatory revenues	633	451	570
Other revenues	84	730	490
Total revenues	14,439	12,857	11,370
Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	12,018	10,540	9,455
Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,704	1,136	855
Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	8,525	6,969	5,796
Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	5,197	4,707	4,514
Operating Segments | San Diego Gas and Electric Company
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	5,586	5,144	4,920
Utilities regulatory revenues	252	360	393
Other revenues	0	0	0
Total revenues	5,838	5,504	5,313
Operating Segments | San Diego Gas and Electric Company | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	5,586	5,144	4,920
Operating Segments | San Diego Gas and Electric Company | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0
Operating Segments | San Diego Gas and Electric Company | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	899	790	692
Operating Segments | San Diego Gas and Electric Company | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	4,687	4,354	4,228
Operating Segments | SoCalGas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	6,459	5,424	4,571
Utilities regulatory revenues	381	91	177
Other revenues	0	0	0
Total revenues	6,840	5,515	4,748
Operating Segments | SoCalGas | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	6,459	5,424	4,571
Operating Segments | SoCalGas | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0
Operating Segments | SoCalGas | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	6,459	5,424	4,571
Operating Segments | SoCalGas | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0
Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,849	1,246	912
Utilities regulatory revenues	0	0	0
Other revenues	70	751	488
Total revenues	1,919	1,997	1,400
Operating Segments | Sempra Infrastructure | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	89	81	58
Operating Segments | Sempra Infrastructure | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,760	1,165	854
Operating Segments | Sempra Infrastructure | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,270	856	623
Operating Segments | Sempra Infrastructure | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	579	390	289
Consolidating adjustments and Parent and other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(172)	(138)	(93)
Utilities regulatory revenues	0	0	0
Other revenues	14	(21)	2
Total revenues	(158)	(159)	(91)
Consolidating adjustments and Parent and other | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(116)	(109)	(94)
Consolidating adjustments and Parent and other | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(56)	(29)	1
Consolidating adjustments and Parent and other | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(103)	(101)	(90)
Consolidating adjustments and Parent and other | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ (69)	$ (37)	$ (3)