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FAIR VALUE MEASUREMENTS - FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Allowance for credit losses | $ 6 | $ 6
Unamortized transaction costs | 4 | 4
Unamortized discount and debt issuance costs | 346 | 322
Finance lease obligations | 1,319 | 1,340
Carrying amount |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Long-term note receivable | 342 | 334
Long-term amounts due to unconsolidated affiliates | 302 | 312
Total long-term debt | 29,704 | 27,716
Fair value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Long-term note receivable | 326 | 318
Long-term amounts due to unconsolidated affiliates | 271 | 283
Total long-term debt | 26,850 | 25,617
Fair value | Level 1 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Long-term note receivable | 0 | 0
Long-term amounts due to unconsolidated affiliates | 0 | 0
Total long-term debt | 0 | 0
Fair value | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Long-term note receivable | 0 | 0
Long-term amounts due to unconsolidated affiliates | 271 | 283
Total long-term debt | 26,850 | 25,617
Fair value | Level 3 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Long-term note receivable | 326 | 318
Long-term amounts due to unconsolidated affiliates | 0 | 0
Total long-term debt | 0 | 0
SDG&E |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Unamortized discount and debt issuance costs | 98 | 89
Finance lease obligations | 1,213 | 1,233
SDG&E | Carrying amount |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total long-term debt | 8,950 | 8,750
SDG&E | Fair value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total long-term debt | 7,747 | 7,856
SDG&E | Fair value | Level 1 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total long-term debt | 0 | 0
SDG&E | Fair value | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total long-term debt | 7,747 | 7,856
SDG&E | Fair value | Level 3 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total long-term debt | 0 | 0
SoCalGas |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Unamortized discount and debt issuance costs | 61 | 55
Finance lease obligations | 106 | 107
SoCalGas | Carrying amount |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total long-term debt | 7,259 | 6,759
SoCalGas | Fair value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total long-term debt | 6,715 | 6,442
SoCalGas | Fair value | Level 1 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total long-term debt | 0 | 0
SoCalGas | Fair value | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total long-term debt | 6,715 | 6,442
SoCalGas | Fair value | Level 3 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total long-term debt | $ 0 | $ 0

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