SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - PROPERTY, PLANT, AND EQUIPMENT (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) segment	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 66,900	$ 80,397
Depreciation expense	2,537	2,409	$ 2,202
Accumulated depreciation	17,889	18,960
Disposal Group Held-for-sale | SI Partners
Property, Plant and Equipment [Line Items]
Property, plant and equipment, assets held for sale, gross	23,579
Property, plant and equipment, net	21,356
Accumulated depreciation, assets held for sale	2,497
Disposal Group Held-for-sale | Ecogas
Property, Plant and Equipment [Line Items]
Accumulated depreciation, assets held for sale	$ 88
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	$ 35,033	33,162
Decrease in wildfire mitigation plan assets	214
Depreciation expense	1,309	1,216	1,092
Accumulated depreciation	8,729	8,051
Decrease in wildfire mitigation plan assets, accumulated depreciation and amortization	71
SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	31,078	29,084
Depreciation expense	1,007	903	$ 833
Accumulated depreciation	8,948	8,330
Natural gas operations | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 4,742	$ 4,531
Depreciation rates (percentage)	2.63%	2.62%	2.60%
Accumulated depreciation	$ 1,191	$ 1,121
Natural gas operations | SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 29,262	$ 27,191
Depreciation rates (percentage)	3.81%	3.68%	3.64%
Accumulated depreciation	$ 8,933	$ 8,315
Electric distribution | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 13,357	$ 12,542
Depreciation rates (percentage)	4.26%	4.21%	4.05%
Electric transmission | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 9,501	$ 8,878
Depreciation rates (percentage)	3.07%	3.06%	3.04%
Electric generation | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,532	$ 2,527
Depreciation rates (percentage)	4.27%	5.43%	5.18%
Other electric | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,915	$ 2,722
Depreciation rates (percentage)	6.72%	6.95%	7.05%
Other non-utility | SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 37	$ 32
Depreciation rates (percentage)	0.97%	0.98%	1.03%
Accumulated depreciation	$ 15	$ 15
Other non-utility | Other Sempra
Property, Plant and Equipment [Line Items]
Accumulated depreciation	212	2,579
Land and land rights | Disposal Group Held-for-sale | SI Partners
Property, Plant and Equipment [Line Items]
Property, plant and equipment, assets held for sale, gross	500
Land and land rights | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	0	498
Pipelines and storage | Disposal Group Held-for-sale | SI Partners
Property, Plant and Equipment [Line Items]
Property, plant and equipment, assets held for sale, gross	3,646
Pipelines and storage | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 481	4,355
Pipelines and storage | Minimum | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	19 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)	44 years
Generating plants | Disposal Group Held-for-sale | SI Partners
Property, Plant and Equipment [Line Items]
Property, plant and equipment, assets held for sale, gross	$ 1,809
Generating plants | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	0	1,820
LNG terminal | Disposal Group Held-for-sale | SI Partners
Property, Plant and Equipment [Line Items]
Property, plant and equipment, assets held for sale, gross	1,160
LNG terminal | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	0	1,156
Refined products terminals | Disposal Group Held-for-sale | SI Partners
Property, Plant and Equipment [Line Items]
Property, plant and equipment, assets held for sale, gross	872
Refined products terminals | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	0	876
Other | Disposal Group Held-for-sale | SI Partners
Property, Plant and Equipment [Line Items]
Property, plant and equipment, assets held for sale, gross	255
Other | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 96	348
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)	9 years
Other | Weighted Average | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	2 years
Construction work in progress | Disposal Group Held-for-sale | SI Partners
Property, Plant and Equipment [Line Items]
Property, plant and equipment, assets held for sale, gross	$ 15,077
Construction work in progress | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,986	1,962
Construction work in progress | SoCalGas
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,779	1,861
Construction work in progress | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	160	8,781
Other | Disposal Group Held-for-sale | SI Partners
Property, Plant and Equipment [Line Items]
Property, plant and equipment, assets held for sale, gross	260
Other | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 52	317
Other | Minimum | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	4 years
Other | Maximum | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	25 years
Other | Weighted Average | Other Sempra
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	10 years
Total Sempra Infrastructure and Parent | Other Sempra
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 789	18,151
Electric transmission, distribution and generation | SDG&E
Property, Plant and Equipment [Line Items]
Accumulated depreciation	7,538	$ 6,930
Plant, pipeline and other distribution assets of Ecogas | Disposal Group Held-for-sale | Ecogas
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	362
Guaymas-El Oro segment of the Sonora Pipeline | Sempra Infrastructure
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	389
Southwest Powerlink (SWPL) transmission line | Electric transmission | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	553
Accumulated depreciation	347
Southwest Powerlink (SWPL) transmission line | Construction work in progress | SDG&E
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 3
Southwest Powerlink | Southwest Powerlink (SWPL) transmission line | Electric transmission | SDG&E
Property, Plant and Equipment [Line Items]
Ownership interest (as a percent)	86.00%