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SB 901 SECURITIZATION AND CUSTOMER CREDIT TRUST (Narrative) (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 19, 2022 | May 09, 2022 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Jul. 25, 2022 | Jul. 20, 2022 | Jun. 30, 2022 | May 16, 2022 | May 10, 2022 | Apr. 04, 2022 | Feb. 28, 2022 | Feb. 18, 2022 | Dec. 31, 2021 | May 11, 2021 | Apr. 23, 2021 | Apr. 30, 2020
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial shareholder contribution |  |  |  |  | $ 2,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  | $ 16,448 |  | 16,448 |  |  |  |  |  |  |  |  |  | $ 9,207 |  |  |
Regulatory liabilities |  |  | 16,921 |  | 16,921 |  |  |  |  |  |  |  |  |  | 11,999 |  |  |
SB 901 securitization charges, net |  |  | 0 | $ 0 | 40 | $ 0 |  |  |  |  |  |  |  |  |  |  |  |
SB 901 Securitization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory liabilities |  |  | 5,380 |  | 5,380 |  |  |  |  |  |  |  |  |  | 0 |  |  |
SB 901 Securitization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  | 5,439 |  | 5,439 |  |  |  | $ 5,500 |  |  |  |  |  | 0 |  |  |
Regulatory liabilities |  |  |  |  |  |  |  |  | $ 5,510 |  |  |  |  |  |  |  |  |
Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  | 16,448 |  | 16,448 |  |  |  |  |  |  |  |  |  | 9,207 |  |  |
Regulatory liabilities |  |  | 16,921 |  | 16,921 |  |  |  |  |  |  |  |  |  | $ 11,999 |  |  |
SB 901 securitization charges, net |  |  | 0 | $ 0 | 40 | $ 0 |  |  |  |  |  |  |  |  |  |  |  |
SB 901 Securitization | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial shareholder contribution |  |  |  |  | 2,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Initial shareholder contribution, 2022 |  |  |  |  | 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Initial shareholder contribution, contributed in 2024 |  |  |  |  | 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Additional contributions funded by tax benefits |  |  |  |  | 7,590 |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent supplemental shareholder contribution |  |  |  |  | $ 775 |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of surplus of shareholder assets |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Customer Harm Threshold, post-emergence transaction, stress test cost |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,500 |  |  |  |  |
Amount contributed | $ 520 | $ 480 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 7,500 |  | $ 7,500 |  |  | $ 3,900 |  |  | $ 3,600 |  |  |  |  |  |  |
Floating Rate Bonds | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  | $ 500 |  |  |  |  |  |  |  |
1.75% Bonds | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  | $ 2,500 |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  |  |  |  | 1.75% |  |  |  |  |  |  |  |
First Mortgage Bonds Due 2023 | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  | $ 1,500 |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  | 1.367% |  |  |  |  |  |  |  |  |  |  |
364-Day 2022A Tranche Loans | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  |  |  |  |  |  |  |  | $ 500 |  |  |  |  |  |
First Mortgage Bonds, Stated Maturity 2024 | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000 |  |  |  |
Interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.25% |  |  |  |
Nothern California Wild Fire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer Harm Threshold, post-emergence transaction, securitized |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,500 | $ 7,500 | $ 7,500
Loss contingency, costs incurred |  |  |  |  | $ 7,500 |  |  |  |  |  |  |  |  |  |  |  |  |

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