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FAIR VALUE MEASUREMENTS (Carrying Amount and Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
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Carrying Amount |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Debt financial instrument | $ 4,343 | $ 4,548
Carrying Amount | Convertible Notes Due 2027 | Secured Debt |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Debt financial instrument | 2,100 |
Carrying Amount | Pacific Gas & Electric Co (Utility) |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Debt financial instrument | 38,359 | 35,909
Level 2 | Fair Value |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Debt financial instrument | 4,587 | 4,695
Level 2 | Fair Value | Convertible Notes Due 2027 | Secured Debt |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Debt financial instrument | 2,200 |
Level 2 | Fair Value | Pacific Gas & Electric Co (Utility) |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Debt financial instrument | $ 35,576 | $ 32,866

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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