SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - PROPERTY, PLANT, AND EQUIPMENT (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 80,397	$ 72,495
Depreciation expense	2,409	2,202	$ 1,995
Accumulated depreciation	$ 18,960	17,535
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, gross	$ 33,162	30,918
Depreciation expense	1,216	1,092	977
Accumulated depreciation	8,051	7,369
SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	29,084	27,025
Depreciation expense	903	833	$ 755
Accumulated depreciation	8,330	7,852
Natural gas operations | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 4,531	$ 4,175
Depreciation rates (percentage)	2.62%	2.60%	2.57%
Accumulated depreciation	$ 1,121	$ 1,048
Natural gas operations | SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 27,191	$ 25,506
Depreciation rates (percentage)	3.68%	3.64%	3.57%
Accumulated depreciation	$ 8,315	$ 7,835
Electric distribution | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 12,542	$ 11,597
Depreciation rates (percentage)	4.21%	4.05%	3.94%
Electric transmission | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 8,878	$ 8,504
Depreciation rates (percentage)	3.06%	3.04%	3.03%
Electric generation | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,527	$ 2,515
Depreciation rates (percentage)	5.43%	5.18%	5.11%
Other electric | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,722	$ 2,507
Depreciation rates (percentage)	6.95%	7.05%	7.03%
Other non-utility | SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 32	$ 50
Depreciation rates (percentage)	0.98%	1.03%	1.54%
Accumulated depreciation	$ 15	$ 17
Other non-utility | Other Sempra
Property, Plant and Equipment [Line Items]
Accumulated depreciation	2,579	2,314
Land and land rights | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 498	488
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, gross	$ 1,313	1,304
Pipelines and storage | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 4,355	3,883
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, gross	$ 1,820	1,815
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, gross	$ 1,156	1,139
Estimated useful life (in years)	42 years
LNG terminal | Weighted Average | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	42 years
Refined products terminals | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 876	656
Estimated useful life (in years)	37 years
Refined products terminals | Weighted Average | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	37 years
Other | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 348	346
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, gross	$ 1,962	1,620
Construction work in progress | SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,861	1,469
Construction work in progress | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	8,781	5,930
Other | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 317	295
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)	35 years
Other | Weighted Average | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	16 years
Total Sempra Infrastructure and Parent | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 18,151	14,552
Plant, pipeline and other distribution assets of Ecogas | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	290	310
Accumulated depreciation	75	82
Electric transmission, distribution and generation | SDG&E
Property, Plant and Equipment [Line Items]
Accumulated depreciation	6,930	$ 6,321
Guaymas-El Oro segment of the Sonora Pipeline | Sempra Infrastructure
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	401
Southwest Powerlink (SWPL) transmission line | Electric transmission | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	563
Accumulated depreciation	338
Southwest Powerlink (SWPL) transmission line | Construction work in progress | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1
Southwest Powerlink | Southwest Powerlink (SWPL) transmission line | Electric transmission | SDG&E
Property, Plant and Equipment [Line Items]
Ownership interest (as a percent)	86.00%