REVENUES - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 3,106	$ 2,648	$ 9,828	$ 8,259
Utilities regulatory revenues	357	235	685	417
Other revenues	154	130	471	337
Total revenues	3,617	3,013	10,984	9,013
Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,587	2,325	8,589	7,422
Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	519	323	1,239	837
Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,738	1,320	6,010	4,823
Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,368	1,328	3,818	3,436
Operating Segments | San Diego Gas and Electric Company
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,383	1,369	4,134	3,755
Utilities regulatory revenues	186	95	279	364
Other revenues	0	0	0	0
Total revenues	1,569	1,464	4,413	4,119
Operating Segments | San Diego Gas and Electric Company | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,383	1,369	4,134	3,755
Operating Segments | San Diego Gas and Electric Company | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Operating Segments | San Diego Gas and Electric Company | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	175	145	664	580
Operating Segments | San Diego Gas and Electric Company | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,208	1,224	3,470	3,175
Operating Segments | Southern California Gas Company
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,214	966	4,473	3,685
Utilities regulatory revenues	171	140	406	53
Other revenues	0	0	0	0
Total revenues	1,385	1,106	4,879	3,738
Operating Segments | Southern California Gas Company | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,214	966	4,473	3,685
Operating Segments | Southern California Gas Company | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Operating Segments | Southern California Gas Company | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,214	966	4,473	3,685
Operating Segments | Southern California Gas Company | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Operating Segments | Sempra Infrastructure
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	551	344	1,348	917
Utilities regulatory revenues	0	0	0	0
Other revenues	146	135	462	352
Total revenues	697	479	1,810	1,269
Operating Segments | Sempra Infrastructure | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	19	17	67	61
Operating Segments | Sempra Infrastructure | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	532	327	1,281	856
Operating Segments | Sempra Infrastructure | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	379	235	948	632
Operating Segments | Sempra Infrastructure | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	172	109	400	285
Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(42)	(31)	(127)	(98)
Utilities regulatory revenues	0	0	0	0
Other revenues	8	(5)	9	(15)
Total revenues	(34)	(36)	(118)	(113)
Consolidation, Eliminations | Utilities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(29)	(27)	(85)	(79)
Consolidation, Eliminations | Energy-related businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(13)	(4)	(42)	(19)
Consolidation, Eliminations | Gas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(30)	(26)	(75)	(74)
Consolidation, Eliminations | Electric
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ (12)	$ (5)	$ (52)	$ (24)