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BANKRUPTCY FILING (Reorganization Items, Net) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Pacific Gas & Electric Co (Utility) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Payments (refunds) for reorganization items | $ 9 | $ 93 | $ 50 | $ 300
PG&E Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Payments (refunds) for reorganization items | $ 0 | $ 6 | $ 31 | $ 96

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