REVENUES - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 5,889	$ 3,689
Utilities regulatory revenues	(159)	25
Other revenues	830	106
Total revenues	6,560	3,820
Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	5,598	3,412
Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	291	277
Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	4,564	2,445
Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,325	1,244
Operating Segments | San Diego Gas and Electric Company
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,765	1,501
Utilities regulatory revenues	(112)	(56)
Other revenues	0	0
Total revenues	1,653	1,445
Operating Segments | San Diego Gas and Electric Company | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,765	1,501
Operating Segments | San Diego Gas and Electric Company | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0
Operating Segments | San Diego Gas and Electric Company | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	554	330
Operating Segments | San Diego Gas and Electric Company | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,211	1,171
Operating Segments | Southern California Gas Company
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,841	1,912
Utilities regulatory revenues	(47)	81
Other revenues	0	0
Total revenues	3,794	1,993
Operating Segments | Southern California Gas Company | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,841	1,912
Operating Segments | Southern California Gas Company | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0
Operating Segments | Southern California Gas Company | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,841	1,912
Operating Segments | Southern California Gas Company | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0
Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	342	320
Utilities regulatory revenues	0	0
Other revenues	854	104
Total revenues	1,196	424
Operating Segments | Sempra Infrastructure | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	30	28
Operating Segments | Sempra Infrastructure | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	312	292
Operating Segments | Sempra Infrastructure | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	204	229
Operating Segments | Sempra Infrastructure | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	138	91
Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(59)	(44)
Utilities regulatory revenues	0	0
Other revenues	(24)	2
Total revenues	(83)	(42)
Consolidation, Eliminations | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(38)	(29)
Consolidation, Eliminations | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(21)	(15)
Consolidation, Eliminations | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(35)	(26)
Consolidation, Eliminations | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ (24)	$ (18)