SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - PROPERTY, PLANT, AND EQUIPMENT (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 72,495	$ 63,893
Depreciation expense	2,202	1,995	$ 1,833
Accumulated depreciation	$ 17,535	16,111
Sempra Infrastructure
Property, Plant and Equipment [Line Items]
Number of segments of pipeline | segment	2
SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 30,918	28,574
Depreciation expense	1,092	977	884
Accumulated depreciation	7,369	6,768
SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment	27,025	25,058
Depreciation expense	833	755	$ 711
Accumulated depreciation	7,852	7,308
Natural gas operations | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 4,175	$ 3,707
Depreciation rates (percentage)	2.60%	2.57%	2.55%
Accumulated depreciation	$ 1,048	$ 979
Natural gas operations | SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 25,506	$ 23,646
Depreciation rates (percentage)	3.64%	3.57%	3.65%
Accumulated depreciation	$ 7,835	$ 7,291
Electric distribution | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 11,597	$ 10,271
Depreciation rates (percentage)	4.05%	3.94%	3.93%
Electric transmission | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 8,504	$ 8,061
Depreciation rates (percentage)	3.04%	3.03%	3.02%
Electric generation | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 2,515	$ 2,461
Depreciation rates (percentage)	5.18%	5.11%	4.74%
Other electric | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 2,507	$ 2,211
Depreciation rates (percentage)	7.05%	7.03%	7.23%
Other non-utility | SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 50	$ 50
Depreciation rates (percentage)	1.03%	1.54%	2.23%
Accumulated depreciation	$ 17	$ 17
Other non-utility | Other Sempra
Property, Plant and Equipment [Line Items]
Accumulated depreciation	2,314	2,035
Land and land rights | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 488	476
Land and land rights | Minimum | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	16 years
Land and land rights | Maximum | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	44 years
Land and land rights | Weighted Average | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	37 years
Pipelines and storage
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,304	1,026
Pipelines and storage | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 3,883	3,813
Pipelines and storage | Minimum | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	41 years
Pipelines and storage | Maximum | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	49 years
Pipelines and storage | Weighted Average | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	42 years
Generating plants | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,815	1,803
Generating plants | Minimum | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	11 years
Generating plants | Maximum | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	28 years
Generating plants | Weighted Average | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	26 years
LNG terminal | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,139	1,138
Estimated useful life (in years)	43 years
LNG terminal | Weighted Average | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	43 years
Refined products terminals | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 656	643
Estimated useful life (in years)	38 years
Refined products terminals | Weighted Average | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	38 years
Other | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 346	344
Other | Minimum | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	1 year
Other | Maximum | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	21 years
Other | Weighted Average | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	15 years
Construction work in progress | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,620	1,863
Construction work in progress | SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment	1,469	1,362
Construction work in progress | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment	5,930	1,757
Other | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 295	287
Other | Minimum | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	2 years
Other | Maximum | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	34 years
Other | Weighted Average | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	15 years
Total Sempra Infrastructure and Parent | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 14,552	10,261
Plant, pipeline and other distribution assets of Ecogas | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment	310	246
Accumulated depreciation	82	65
Electric transmission, distribution and generation | SDG&E
Property, Plant and Equipment [Line Items]
Accumulated depreciation	6,321	$ 5,789
Guaymas-El Oro segment of the Sonora Pipeline | Sempra Infrastructure
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	411
Southwest Powerlink (SWPL) transmission line | Electric transmission | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment	554
Accumulated depreciation	323
Southwest Powerlink (SWPL) transmission line | Construction work in progress | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 7
Southwest Powerlink | Southwest Powerlink (SWPL) transmission line | Electric transmission | SDG&E
Property, Plant and Equipment [Line Items]
Ownership interest (as a percent)	86.00%