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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% |  |

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