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GENERAL INFORMATION AND OTHER FINANCIAL DATA - CAPITALIZED FINANCING COSTS (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Capitalized Financing Costs Disclosure [Line Items] |  |  |  |
Capitalized interest costs | $ 110 | $ 60 | $ 183 | $ 117
San Diego Gas and Electric Company |  |  |  |
Capitalized Financing Costs Disclosure [Line Items] |  |  |  |
Capitalized interest costs | 31 | 26 | 62 | 54
Southern California Gas Company |  |  |  |
Capitalized Financing Costs Disclosure [Line Items] |  |  |  |
Capitalized interest costs | $ 20 | $ 17 | $ 35 | $ 35

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- Definition Amount of interest capitalized, including amount of allowance for funds used during construction. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 980 -SubTopic 835 -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482064/980-835-45-1 + Details
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