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EQUITY (Narrative) (Details) - USD ($) $ in Millions |  |  |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended | 27 Months Ended | 45 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 18, 2023 | Sep. 14, 2023 | May 18, 2023 | Feb. 16, 2023 | Dec. 15, 2022 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2020 | Sep. 30, 2023 | Sep. 30, 2023 | Dec. 31, 2022 | Jul. 08, 2021
Schedule Of Changes In Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, value, new issues |  |  |  |  |  | $ (610.0) | $ (609.0) | $ (610.0) |  | $ (609.0) | $ (407.0) |  |  |  |  |  |  |
Shares outstanding (in shares) | 2,611,251,771 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) |  |  |  |  |  | 2,133,508,181 |  |  |  |  |  | 2,133,508,181 |  |  | 2,133,508,181 | 2,133,508,181 | 1,987,784,948 |
Preferred stock dividend requirement |  |  |  |  |  | $ 3.0 | $ 4.0 | $ 3.0 | $ 3.0 | $ 4.0 | $ 2.0 |  |  |  |  |  |  |
Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Changes In Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) |  |  |  |  |  | 180,000,000 |  |  |  |  |  | 180,000,000 |  |  | 180,000,000 | 180,000,000 |  |
Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Changes In Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares outstanding (in shares) | 264,374,809 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) |  |  |  |  |  | 264,374,809 |  |  |  |  |  | 264,374,809 |  |  | 264,374,809 | 264,374,809 | 264,374,809 |
Preferred stock dividend requirement |  | $ 3.5 |  |  | $ 3.5 | $ 3.0 |  |  | $ 3.0 |  |  | $ 10.0 | $ 10.0 |  |  |  |  |
Common stock dividends declared |  | $ 450.0 | $ 450.0 | $ 425.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fire Victim Trust |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Changes In Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares sold, tax impact |  |  |  |  |  |  |  |  |  |  |  | 822.0 |  |  | $ 1,700.0 |  |  |
Number of shares sold (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 410,000,000 |  |  |
Fire Victim Trust | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Changes In Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares sold (in shares) | 410,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares owned (in shares) | 67,743,590 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PG&E Corporation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Changes In Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock to be received, value |  |  |  |  |  | $ 1,300.0 |  |  |  |  |  | $ 1,300.0 |  |  | $ 1,300.0 | $ 1,300.0 |  |
PG&E Corporation | Equity Units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Changes In Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 16,000,000 |  |  |  |
PG&E Corporation | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Changes In Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 137,000,000 |  |
Stock issued during period, value, new issues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,300.0 |  |
PG&E Corporation | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Changes In Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding, adjusted (in shares) | 2,065,764,591 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PG&E Corporation | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Changes In Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity security ownership with board of director approval |  |  |  |  |  | 4.75% |  |  |  |  |  | 4.75% |  |  | 4.75% | 4.75% |  | 4.75%
PG&E Corporation | Minimum | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Changes In Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of shares, right to receive |  |  |  |  |  |  |  |  |  |  |  |  |  | 137,000,000 |  |  |  |
PG&E Corporation | Minimum | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Changes In Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity security ownership with board of director approval | 3.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PG&E Corporation | Maximum | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Changes In Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of shares, right to receive |  |  |  |  |  |  |  |  |  |  |  |  |  | 168,000,000 |  |  |  |

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