SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - PROPERTY, PLANT, AND EQUIPMENT (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 63,893	$ 58,940
Depreciation expense	1,995	1,833	$ 1,646
Accumulated depreciation	16,111	15,046
San Diego Gas and Electric Company
Property, Plant and Equipment [Line Items]
Property, plant and equipment	28,574	26,456
Depreciation expense	977	884	797
Accumulated depreciation	6,768	6,408
SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment	25,058	23,104
Depreciation expense	755	711	$ 649
Accumulated depreciation	7,308	6,861
Natural gas operations | San Diego Gas and Electric Company
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 3,707	$ 3,200
Depreciation rates (percentage)	2.57%	2.55%	2.51%
Accumulated depreciation	$ 979	$ 919
Natural gas operations | SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 23,646	$ 21,894
Depreciation rates (percentage)	3.57%	3.65%	3.63%
Accumulated depreciation	$ 7,291	$ 6,845
Electric distribution | San Diego Gas and Electric Company
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 10,271	$ 9,471
Depreciation rates (percentage)	3.94%	3.93%	3.90%
Electric transmission | San Diego Gas and Electric Company
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 8,061	$ 7,577
Depreciation rates (percentage)	3.03%	3.02%	3.10%
Electric generation | San Diego Gas and Electric Company
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 2,461	$ 2,446
Depreciation rates (percentage)	5.11%	4.74%	4.56%
Other electric | San Diego Gas and Electric Company
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 2,211	$ 2,100
Depreciation rates (percentage)	7.03%	7.23%	6.92%
Other non-utility | SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 50	$ 50
Depreciation rates (percentage)	1.54%	2.23%	3.80%
Accumulated depreciation	$ 17	$ 16
Other non-utility | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Accumulated depreciation	2,035	1,777
Land and land rights | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 476	291
Land and land rights | Minimum | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	16 years
Land and land rights | Maximum | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	44 years
Land and land rights | Weighted Average | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	37 years
Pipelines and storage
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,026	1,018
Pipelines and storage | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 3,813	3,698
Pipelines and storage | Minimum | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	41 years
Pipelines and storage | Maximum | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	49 years
Pipelines and storage | Weighted Average | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	42 years
Generating plants | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,803	1,659
Generating plants | Minimum | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	11 years
Generating plants | Maximum | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	28 years
Generating plants | Weighted Average | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	26 years
LNG terminals | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,138	1,138
Estimated useful life	43 years
LNG terminals | Weighted Average | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	43 years
Refined products terminals | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 643	420
Estimated useful life	38 years
Refined products terminals | Weighted Average | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	38 years
Other | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 344	370
Other | Minimum | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	1 year
Other | Maximum | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	22 years
Other | Weighted Average | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Construction work in progress | San Diego Gas and Electric Company
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,863	1,662
Construction work in progress | SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment	1,362	1,160
Construction work in progress | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Property, plant and equipment	1,757	1,494
Other | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 287	310
Other | Minimum | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	4 years
Other | Maximum | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	34 years
Other | Weighted Average | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Estimated useful life	16 years
Total Sempra Infrastructure and Parent | Sempra Infrastructure and parent
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 10,261	9,380
Plant, pipeline and other distribution assets of Ecogas
Property, Plant and Equipment [Line Items]
Accumulated depreciation	65	55
Plant, pipeline and other distribution assets of Ecogas | Other Operating Units and Parent
Property, Plant and Equipment [Line Items]
Property, plant and equipment	246	211
Electricity | San Diego Gas and Electric Company
Property, Plant and Equipment [Line Items]
Accumulated depreciation	5,789	$ 5,489
Southwest Powerlink (SWPL) transmission line | Electric transmission | San Diego Gas and Electric Company
Property, Plant and Equipment [Line Items]
Property, plant and equipment	554
Accumulated depreciation	307
Southwest Powerlink (SWPL) transmission line | Construction work in progress | San Diego Gas and Electric Company
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 7
Southwest Powerlink | Southwest Powerlink (SWPL) transmission line | Electric transmission | San Diego Gas and Electric Company
Property, Plant and Equipment [Line Items]
Ownership interest (as a percent)	86.00%