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DEBT (Narrative) (Details) - USD ($) |  |  |  |  |  | 3 Months Ended | 9 Months Ended |  |  |  |  |
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Sep. 11, 2024 | Sep. 05, 2024 | Jul. 25, 2024 | Apr. 16, 2024 | Apr. 15, 2024 | Sep. 30, 2024 | Sep. 30, 2024 | Sep. 30, 2023 | Aug. 01, 2024 | Jun. 28, 2024 | Feb. 28, 2024 | Dec. 04, 2023 | Aug. 10, 2023
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments under term loan credit facilities |  |  |  |  |  |  | $ 2,350,000,000 | $ 0 |  |  |  |  |
Write-off of deferred debt issuance costs |  |  |  |  |  | $ 9,000,000 | 9,000,000 |  |  |  |  |  |
Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments under term loan credit facilities |  |  |  |  |  |  | 1,850,000,000 | $ 0 |  |  |  |  |
Remaining borrowings capacity |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,380,000,000
Capital expenditures for future recovery |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,380,000,000
2 Year Term Loan | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 400,000,000 |  |  |  |  |  |  |  |  |
364-Day 2023 Tranche Loans | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | 125,000,000 |  |  |  |  |  |  |  |  |
364 Day 2024 Term Loan | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 525,000,000 |  |  |  |  |  |  |  |  |
364 Day 2024 Term Loan | Pacific Gas & Electric Co (Utility) | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Credit spread adjustment |  |  |  | 0.10% |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 1.375% |  |  |  |  |  |  |  |  |
364 Day 2024 Term Loan | Pacific Gas & Electric Co (Utility) | Base Rate |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 0.375% |  |  |  |  |  |  |  |  |
Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, gross | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Term Loan | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments under term loan credit facilities |  | $ 1,750,000,000 |  |  | $ 100,000,000 |  |  |  |  |  |  |  |
Debt financial instrument |  |  |  |  |  |  |  |  |  | $ 250,000,000 |  |  |
Utility revolving credit facility |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum facility limit |  |  |  |  |  | 6,400,000,000 | 6,400,000,000 |  |  |  |  |  |
Remaining borrowings capacity |  |  |  |  |  | 4,266,000,000 | 4,266,000,000 |  |  |  |  |  |
Long-term debt, gross |  |  |  |  |  | 1,750,000,000 | 1,750,000,000 |  |  |  |  |  |
Utility revolving credit facility | PG&E Corporation |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum facility limit |  |  |  |  |  | 500,000,000 | 500,000,000 |  |  |  |  |  |
Extension option, term |  |  | 1 year |  |  |  |  |  |  |  |  |  |
Remaining borrowings capacity |  |  |  |  |  | 500,000,000 | 500,000,000 |  |  |  |  |  |
Long-term debt, gross |  |  |  |  |  | 0 | 0 |  |  |  |  |  |
Utility revolving credit facility | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum facility limit |  |  | $ 4,196,000,000 |  |  | 4,400,000,000 | 4,400,000,000 |  |  |  |  |  |
Extension option, term |  |  | 1 year |  |  |  |  |  |  |  |  |  |
Remaining borrowings capacity |  |  | $ 204,000,000 |  |  | 3,766,000,000 | 3,766,000,000 |  |  |  |  |  |
Long-term debt, gross |  |  |  |  |  | $ 250,000,000 | $ 250,000,000 |  |  |  |  |  |
Series 2024-A Senior Secured Recovery Bonds | Pacific Gas & Electric Co (Utility) | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  | $ 1,420,000,000 |  |  |  |
Recovery Bonds Tranche One | Pacific Gas & Electric Co (Utility) | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  | $ 300,000,000 |  |  |  |
Interest rate |  |  |  |  |  |  |  |  | 4.838% |  |  |  |
Recovery Bonds Tranche Two | Pacific Gas & Electric Co (Utility) | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  | $ 373,000,000 |  |  |  |
Interest rate |  |  |  |  |  |  |  |  | 5.231% |  |  |  |
Recovery Bonds Tranche Three | Pacific Gas & Electric Co (Utility) | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  | $ 746,000,000 |  |  |  |
Interest rate |  |  |  |  |  |  |  |  | 5.529% |  |  |  |
First Mortgage Bonds Due 2025 | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |
First Mortgage Bonds Due 2029 | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  | $ 850,000,000 |  |
Interest rate |  |  |  |  |  |  |  |  |  |  | 5.55% |  |
First Mortgage Bonds Due 2034 | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  | $ 1,100,000,000 |  |
Interest rate |  |  |  |  |  |  |  |  |  |  | 5.80% |  |
First Mortgage Bonds Due 2053 | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  | $ 300,000,000 |  |
Interest rate |  |  |  |  |  |  |  |  |  |  | 6.75% |  |
First Mortgage Bonds Due 2054 | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 750,000,000 |  |  |  |  |  |  |  |  |  |  |
Interest rate |  | 5.90% |  |  |  |  |  |  |  |  |  |  |
Junior Subordinated Notes Due 2055 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 3.883% |  |  |  |  |  |  |  |  |  |  |  |
Interest rate | 7.375% |  |  |  |  |  |  |  |  |  |  |  |
Junior Subordinated Notes Due 2055 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 7.375% |  |  |  |  |  |  |  |  |  |  |  |
Convertible Notes Due 2027 | PG&E Corporation | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  | $ 2,150,000,000 |
Interest rate |  |  |  |  |  |  |  |  |  |  |  | 4.25% |

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