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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - 10Q Narrative (Details) ft² in Thousands |  |  | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 11, 2024 USD ($) | Oct. 18, 2022 USD ($) | Sep. 30, 2024 USD ($) ft² | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) ft² | Sep. 30, 2023 USD ($) | Aug. 01, 2024 USD ($) | Mar. 31, 2024 | Dec. 31, 2023 USD ($) | Nov. 30, 2022 USD ($) | Jul. 20, 2022 USD ($) | May 10, 2022 USD ($) | Nov. 12, 2021 USD ($) | Jul. 12, 2019
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period for probable revenue recovery |  |  |  |  | 24 months |  |  |  |  |  |  |  |  |
Credit losses |  |  | $ 109,000,000 | $ 259,000,000 | $ 244,000,000 | $ 552,000,000 |  |  |  |  |  |  |  |
Regulatory assets |  |  | $ 15,584,000,000 |  | $ 15,584,000,000 |  |  |  | $ 17,189,000,000 |  |  |  |  |
Government Assistance, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Operating and maintenance | Operating and maintenance | Operating and maintenance | Operating and maintenance |  |  |  |  |  |  |  |
Litigation liability, current |  |  | $ 193,000,000 |  | $ 193,000,000 |  |  |  |  |  |  |  |  |
Wildfire Fund asset |  |  | 301,000,000 |  | 301,000,000 |  |  |  | 450,000,000 |  |  |  |  |
Litigation contribution, net |  |  | 4,200,000,000 |  | 4,200,000,000 |  |  |  |  |  |  |  |  |
Amortization and accretion |  |  | 139,000,000 | $ 219,000,000 | 295,000,000 | $ 453,000,000 |  |  |  |  |  |  |  |
Performance-Based Disbursement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disbursement |  | $ 7 |  |  |  |  |  |  |  |  |  |  |  |
Maximum disbursement |  | 300,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Performance-Based Disbursement | Cost of Goods and Services Sold, Electricity |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reimbursement amount |  |  |  | 48,000,000 |  | 48,000,000 |  |  |  |  |  |  |  |
Civil Nuclear Credit Program |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disbursement | $ 1,100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Civil Nuclear Credit Program | Cost of Goods and Services Sold, Electricity |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reimbursement amount |  |  | 71,000,000 | 72,000,000 | 370,000,000 | 106,000,000 |  |  |  |  |  |  |  |
Regulatory Balancing Accounts Receivable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total regulatory balancing accounts |  |  | 7,150,000,000 |  | 7,150,000,000 |  |  |  | 5,660,000,000 |  |  |  |  |
Regulatory Balancing Accounts Receivable | Residential uncollectibles balancing accounts |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total regulatory balancing accounts |  |  | 174,000,000 |  | 174,000,000 |  |  |  | 507,000,000 |  |  |  |  |
Decrease in regulatory balancing accounts |  |  |  |  | 500,000,000 |  |  |  |  |  |  |  |  |
FERC |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  | 78,000,000 |  | 78,000,000 |  |  |  | 78,000,000 |  |  |  |  |
Wildfire Fund Asset |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible asset, useful life |  |  |  |  |  |  |  | 20 years |  |  |  |  |  | 15 years
Other Current Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Wildfire fund, noncurrent |  |  | 755,000,000 |  | 755,000,000 |  |  |  |  |  |  |  |  |
Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  | 15,584,000,000 |  | 15,584,000,000 |  |  |  | 17,189,000,000 |  |  |  |  |
Wildfire Fund asset |  |  | 301,000,000 |  | 301,000,000 |  |  |  | 450,000,000 |  |  |  |  |
Amortization and accretion |  |  | $ 139,000,000 | $ 219,000,000 | $ 295,000,000 | $ 453,000,000 |  |  |  |  |  |  |  |
Pacific Gas & Electric Co (Utility) | The Lakeside Building |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rentable square feet | ft² |  |  | 910 |  | 910 |  |  |  |  |  |  |  |  |
Senate Bill 846 | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | 1,100,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Senate Bill 846 | Pacific Gas & Electric Co (Utility) | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 1,400,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Receivables Securitization Program | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding borrowings |  |  | $ 1,500,000,000 |  | $ 1,500,000,000 |  |  |  | 1,500,000,000 |  |  |  |  |
Receivables Securitization Program | PG&E AR Facility, LLC (SPV) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable, net |  |  | 3,400,000,000 |  | 3,400,000,000 |  |  |  | 2,700,000,000 |  |  |  |  |
Recovery Bonds | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | 3,200,000,000 |  | 3,200,000,000 |  |  |  | 1,800,000,000 |  |  |  | $ 860,000,000 |
Series 2022-A Recovery Bonds |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  | $ 983,000,000 |  |  |  |
Series 2024-A Recovery Bonds |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  | $ 1,420,000,000 |  |  |  |  |  |  |
SB 901 securitization | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 7,300,000,000 |  | $ 7,300,000,000 |  |  |  | $ 7,300,000,000 |  | $ 3,900,000,000 | $ 3,600,000,000 |  |

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