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SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - CAPITALIZED FINANCING COSTS (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Capitalized Financing Costs Disclosure [Line Items] |  |  |
Total capitalized financing costs | $ 448 | $ 255 | $ 217
SDG&E |  |  |
Capitalized Financing Costs Disclosure [Line Items] |  |  |
Total capitalized financing costs | 116 | 116 | 106
SoCalGas |  |  |
Capitalized Financing Costs Disclosure [Line Items] |  |  |
Total capitalized financing costs | $ 77 | $ 73 | $ 64

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- Definition Amount of interest capitalized during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483013/835-20-50-1 + Details
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