Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Other Other Current Balancing Accounts [Member] Regulatory balancing accounts record the differences between revenues and costs that can be recovered through rates. The aggregate carrying amounts, as of the balance sheet date, of current regulatory balancing accounts not separately disclosed in the footnote. Wildfire Fund expense Wildfire Fund expense Estimated Litigation Liability, Expense Estimated Litigation Liability, Expense Debt [Line Items] Debt [Line Items] Debt [Line Items] Maximum Maximum [Member] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Total income per common share: Earnings Per Share, Basic and Diluted EPS [Abstract] Earnings Per Share, Basic and Diluted EPS Title of 12(b) Security Title of 12(b) Security Number of multi-family residential structures destroyed (structure) Loss Contingency, Number Of Multi-Family Residential Structures Destroyed Loss Contingency, Number Of Multi-Family Residential Structures Destroyed Subsequent Event Subsequent Event [Member] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Carrying Amount Reported Value Measurement [Member] Income Available for Common Shareholders Net Income (Loss) Available to Common Stockholders, Diluted Adjustment to Compensation, Amount Adjustment to Compensation Amount Probable of recovery received Regulatory Liability, Probable of Recovery Received Regulatory Liability, Probable of Recovery Received Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] Financial Instrument [Axis] Financial Instrument [Axis] Formula Rate [Domain] Formula Rate [Domain] Formula Rate [Domain] Carrying Amount and Fair Value of Financial Instruments Schedule Of Carrying Amount And Fair Value Of Financial Instruments [Table Text Block] Carrying amount and fair value of financial instruments Text Block Loss contingency liability Loss Contingency Accrual First preferred stock, cumulative, par value $25 per share, 5.50% nonredeemable First Preferred Stock, Cumulative, Par Value $25 Per Share, 5.50% Nonredeemable [Member] First Preferred Stock, Cumulative, Par Value $25 Per Share, 5.50% Nonredeemable [Member] First Mortgage Bonds Due 2026 First Mortgage Bonds Due March 2026 [Member] First Mortgage Bonds Due March 2026 Derivative Instrument [Axis] Derivative Instrument [Axis] Other comprehensive income before reclassifications, tax Other Comprehensive Income (Loss) before Reclassifications, Tax Proceeds from sales and maturities of nuclear decommissioning trust investments Proceeds from sales and maturities of nuclear decommissioning trust investments Proceeds from sales and maturities of nuclear decommissioning trust investments Proceeds from Decommissioning Trust Fund Assets Consolidated Entities [Axis] Consolidated Entities [Axis] Customer credit trust Customer Credit Trust [Member] Customer Credit Trust Remediation cost recovery percentage Remediation Cost Recovery Percentage Remediation Cost Recovery Percentage Number of acres burned (acre) Number Of Acres Burned Acres burned down in the Butte Fire. Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Regulatory Balancing Accounts [Domain] Regulatory Balancing Accounts [Domain] Regulatory balancing accounts record the differences between revenues and costs that can be recovered through rates. Gain Contingencies, Nature [Axis] Gain Contingencies, Nature [Axis] Potential premium obligation Potential Premium Obligation Potential premium obligation for nuclear facilities Consolidated Entities [Domain] Consolidated Entities [Domain] Public Utility, Property, Plant and Equipment [Table] Public Utility, Property, Plant and Equipment [Table] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Exchange [Domain] Exchange [Domain] Noncurrent Liabilities Noncurrent Liabilities Liabilities, Noncurrent [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Number of reportable segments Number of Reportable Segments Total current liabilities Liabilities, Current Claims and legal fees received Liability Insurance Coverage, Insurance Receivable Recognized Liability Insurance Coverage, Insurance Receivable Recognized Other noncurrent assets and liabilities Other noncurrent assets and liabilities Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net Entity Address, City or Town Entity Address, City or Town Number of residential structures destroyed (structure) Loss Contingency, Number Of Residential Structures Destroyed Loss Contingency, Number Of Residential Structures Destroyed Regulatory account transfer Regulatory Account Transfer Pension benefits probably of recovery from customers in future rates and transferred to regulatory account Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Loss contingency accrual, period increase (decrease) Loss Contingency Accrual, Period Increase (Decrease) Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Inventories Inventories Inventory, Net [Abstract] Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Net current period other comprehensive gain (loss) Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Global equity securities Global Equity Securities [Member] Global Equity Securities [Member] PG&E Corporation Parent Company [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Purchases of self-insurance investments Purchases of self-insurance investments Payment to Acquire Life Insurance Policy, Investing Activities Plus: Mandatory Convertible Preferred Stock dividends Convertible Preferred Dividends, Net of Tax Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Pension and other postretirement benefit plans obligations, tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Total other comprehensive income (loss) Other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Level 3 Reconciliation Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Repayments under credit facilities Repayments under credit facilities Repayments of Lines of Credit 1–5 years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Supplemental disclosures of noncash investing and financing activities Supplemental disclosures of noncash investing and financing activities Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Document Period End Date Document Period End Date Debt instrument, face amount Debt Instrument, Face Amount Gross realized losses on securities Debt Securities, Available-for-Sale, Realized Loss Revenues From External Customers And Long Lived Assets [Table] Revenues From External Customers And Long Lived Assets [Table] Revenues From External Customers And Long Lived Assets [Table] Wildfire-related accounts Wildfire Expense Memorandum Account [Member] Wildfire Expense Memorandum Account [Member] Number of detached structures destroyed (structure) Loss Contingency, Number Of Detached Structures Destroyed Loss Contingency, Number Of Detached Structures Destroyed Accumulated other comprehensive loss Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Operating lease liabilities Operating lease liabilities Operating Lease, Liability, Current EARNINGS PER SHARE Earnings Per Share [Text Block] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Accounts receivable Accounts receivable Increase (Decrease) in Accounts and Notes Receivable Trading Symbol Trading Symbol Accumulated Other Comprehensive Income (Loss) AOCI Including Portion Attributable to Noncontrolling Interest [Member] Capital expenditures Capital expenditures Payments to Acquire Property, Plant, and Equipment Comprehensive Income Available for Common Shareholders Comprehensive Income (Loss), Net Of Tax, Available To Common Stockholders, Basic Comprehensive Income (Loss), Net Of Tax, Available To Common Stockholders, Basic Company Selected Measure Name Company Selected Measure Name Annual contribution period Loss Contingency, Annual Contribution Period Loss Contingency, Annual Contribution Period Regulatory account transfer Accumulated Defined Benefit Plans Adjustment, Net Transition Attributable to Parent [Member] Accounts receivable, net Accounts Receivable from Securitization Schedule of Regulatory Assets [Table] Regulated Operation, Regulatory Asset [Table] Natural Gas Natural Gas [Member] Natural Gas [Member] Cash Flows from Operating Activities Cash Flows from Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Expected capitalization, initial contribution Loss Contingency, Expected Capitalization, Initial Contribution Loss Contingency, Expected Capitalization, Initial Contribution Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Industrial Industrial [Member] Industrial [Member] Deferred income taxes and tax credits, net Deferred income taxes and tax credits, net Deferred Income Taxes and Tax Credits Accounts receivable Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current [Abstract] Civil Nuclear Credit Program Civil Nuclear Credit Program [Member] Civil Nuclear Credit Program Dividends declared but not yet paid Dividends Payable Amount of environmental loss accrual expected to be recovered Recorded Third-Party Environmental Recoveries Receivable Accumulated depreciation Accumulated depreciation Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization Award Timing Predetermined Award Timing Predetermined [Flag] Noncurrent accounts receivable Accounts Receivable, after Allowance for Credit Loss, Noncurrent Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Level 1 Fair Value, Inputs, Level 1 [Member] Price risk management instruments, gross subject to netting Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement Dilutive effect of Employee stock-based compensation (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Long-Term Regulatory Assets Schedule Of Long Term Regulatory Assets [Table Text Block] Schedule Of Long Term Regulatory Assets Other (net of allowance for doubtful accounts) Allowance for Credit Loss, Receivable, Other, Current Regulatory Balancing Accounts [Axis] Regulatory Balancing Accounts [Axis] Information by type of regulatory balancing account Regulated Operations [Abstract] Regulated Operations [Abstract] Debt financial instrument Long-Term Debt, Fair Value Operating lease ROU asset Operating lease ROU asset Operating Lease, Right-of-Use Asset AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Purchases of nuclear decommissioning trust investments Purchases of nuclear decommissioning trust investments Payments to Acquire Investments to be Held in Decommissioning Trust Fund Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Common stock dividends paid Payments of Ordinary Dividends, Common Stock Reimbursements Insurance Settlements Receivable, Reimbursements Insurance Settlements Receivable, Reimbursements Expiration Date Trading Arrangement Expiration Date Restricted cash and restricted cash equivalents (includes $215 million and $225 million related to VIEs at respective dates) Restricted cash and cash equivalents Less: Restricted cash and restricted cash equivalents Restricted Cash and Cash Equivalent Short-term investments Cash and Cash Equivalents, Fair Value Disclosure Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Estimated losses Loss Contingency, Estimate of Possible Loss Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] Beginning balance Ending balance Government Assistance, Liability Cash Flows from Investing Activities Cash Flows from Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Schedule of Environmental Remediation Liability Schedule of Environmental Loss Contingencies by Site [Table Text Block] Energy procurement Energy Procurement Costs [Member] The Utility is generally authorized to recover 100% of its prudently incurred electric fuel and energy procurement costs. The Utility tracks energy procurement costs in balancing accounts and files annual forecasts of energy procurement costs that it expects to incur during the following year. Wildfire and Gas Safety Costs Interim Rate Relief Wildfire and Gas Safety Costs Interim Rate Relief [Member] Wildfire and Gas Safety Costs Interim Rate Relief Additions Increase in regulatory liabilities Increase (Decrease) in Regulatory Liabilities Income tax deduction, accrued amount Income Tax Deduction, Accrued Amount Income Tax Deduction, Accrued Amount DEBT SB 901 SECURITIZATION AND CUSTOMER CREDIT TRUST Debt Disclosure [Text Block] Litigation contribution, net Litigation Contribution Litigation Contribution Debt issuance costs Debt Issuance Costs, Net Recovery Bonds Recovery Bonds [Member] Recovery Bonds Pension benefits Pension Costs [Member] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Secured Debt Secured Debt [Member] Trade creditors Trade creditors Accounts Payable, Trade, Current Government Assistance, Type [Axis] Government Assistance, Type [Axis] Site Contingency [Table] Site Contingency [Table] Interest rate Debt Instrument, Interest Rate, Stated Percentage Total shareholders’ equity Equity, Attributable to Parent Wildfire Fund asset Litigation Asset, Current Litigation Asset, Current Entity Listings, Exchange [Axis] Entity Listings, Exchange [Axis] ASSETS ASSETS Assets [Abstract] Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost Insider Trading Policies and Procedures [Line Items] Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Regulatory assets Regulatory assets Regulatory Asset, Current Number of commercial non-residential structures destroyed (structure) Loss Contingency, Number Of Commercial Non-Residential Structures Destroyed Loss Contingency, Number Of Commercial Non-Residential Structures Destroyed Commercial Commercial [Member] Commercial [Member] First preferred stock, cumulative, par value $25 per share, 5% series A redeemable First Preferred Stock, Cumulative, Par Value $25 Per Share, 5% Series A Redeemable [Member] First Preferred Stock, Cumulative, Par Value $25 Per Share, 5% Series A Redeemable [Member] Government Assistance, Liability, Statement of Financial Position [Extensible Enumeration] Government Assistance, Liability, Statement of Financial Position [Extensible Enumeration] Entity Central Index Key Entity Central Index Key Regulatory Liabilities [Line Items] Regulatory Liability [Line Items] Amortization Amortization of Regulatory Asset SFGO sale SFGO Sale [Member] SFGO Sale Regulatory balancing accounts Decrease in regulatory balancing accounts Revenue From Contract With Customer, Increase (Decrease) Regulatory Balancing Accounts Revenue From Contract With Customer, Increase (Decrease) Regulatory Balancing Accounts Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Number of public offerings of notes with complaints against underwriters (offering) Loss Contingency, Public Offerings Of Notes, Number, With Complaints Against Underwriters Loss Contingency, Public Offerings Of Notes, Number, With Complaints Against Underwriters Fossil fuel-fired generation facilities and sites Fossil Fuel Fired Generation Facilities Formerly Owned By Utility Fossil Fuel-Fired Generation Facilities Formerly Owned By Utility Other comprehensive income before reclassifications: Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Federal Income Tax Note [Table] Federal Income Tax Note [Table] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Expected capitalization, proceeds of bond Loss Contingency, Expected Capitalization, Proceeds of Bond Loss Contingency, Expected Capitalization, Proceeds of Bond Financing lease liabilities Finance Lease, Liability, Noncurrent Cost recovery Gain Contingency, Cost Recovery Gain Contingency, Cost Recovery Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Probable of recovery Regulatory Liability, Probable of Recovery Regulatory Liability, Probable of Recovery Full insurance policy limit Full Insurance Policy Limit Full Insurance Policy Limit Number of recovery bonds issued Number of Recovery Bonds Issued Number of Recovery Bonds Issued Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Summary of Wildfire-Related Claims Schedule of Loss Contingencies by Contingency [Table Text Block] Pension and Other Post-Retirement Benefits Pension and Other Postretirement Plans, Policy [Policy Text Block] SB 901 securitization regulatory liability Regulatory Liability [Roll Forward] Regulatory Liability Regulatory Liability [Domain] Regulatory Liability [Domain] Statement [Line Items] Statement [Line Items] Wildfire-related insurance receivable Wildfire-related insurance receivable Increase (Decrease) in Insurance Settlements Receivable TOTAL ASSETS Assets Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plan [Table] Loss accrual, beginning balance Loss accrual, ending balance Loss Contingency Accrual, Net of Payments Loss Contingency Accrual, Net of Payments Income tax deduction, customer bill credits Income Tax Deduction, Customer Bill Credits Income Tax Deduction, Customer Bill Credits Interest expense Interest expense Interest Expense, Nonoperating Interest rate reset period Debt Instrument, Interest Rate Reset, Period Debt Instrument, Interest Rate Reset, Period Total Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax PEO PEO [Member] Gas distribution and transmission Gas Distribution And Transmission [Member] Gas Distribution And Transmission Member First preferred stock, cumulative, par value $25 per share, 5% redeemable First Preferred Stock, Cumulative, Par Value $25 Per Share, 5% Redeemable [Member] First Preferred Stock, Cumulative, Par Value $25 Per Share, 5% Redeemable [Member] Other Other Other Liabilities, Noncurrent Retirement Plan Type [Axis] Retirement Plan Type [Axis] Fixed-income securities Fixed Income Securities [Member] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Residential Residential [Member] Residential [Member] Preferred stock dividend requirement Dividends, Preferred Stock, Less Dividends in Arrears Dividends, Preferred Stock, Less Dividends in Arrears Reinvested Earnings Retained Earnings [Member] Depreciation, amortization, and decommissioning Depreciation, amortization, and decommissioning Depreciation Amortization Decommissioning The current period expense charged against earnings on long-lived, physical assets used in the normal conduct of business and not intended for resale to allocate or recognize the cost of assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset. Examples include buildings, production equipment and customer lists. Operating lease liabilities Operating lease liabilities Operating Lease, Liability, Noncurrent Utility revolving credit facility Revolving Credit Facility [Member] Number of plaintiffs represented by complaints Loss Contingency, Number of Plaintiffs Represented By Complaints Loss Contingency, Number of Plaintiffs Represented By Complaints Amortization of net actuarial loss (gain) Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] Amount primarily related to deferred taxes on appreciation of investment value Amount Primarily Related To Deferred Taxes On Appreciation Of Investment Value Amount primarily related to deferred taxes on appreciation of investment value Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Net Income Per Common Share, Diluted (in dollars per share) Diluted (in dollars per share) Earnings Per Share, Diluted Credit losses Financing Receivable, Credit Loss, Expense (Reversal) Rabbi trusts Rabbi Trusts [Member] Trust which supports the non-qualified benefit obligations of employers to their employees Litigation Case [Domain] Litigation Case [Domain] Offsetting Assets Offsetting Assets [Table Text Block] Dilutive effect of Mandatory Convertible Preferred Stock (in shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock Long-term Purchase Commitment [Line Items] Long-Term Purchase Commitment [Line Items] Loan Forgiveness and Other Adjustments Government Assistance, Loan Forgiveness and Other Adjustments [Member] Government Assistance, Loan Forgiveness and Other Adjustments Total revenue from contracts with customers Revenue from Contract with Customer, Excluding Assessed Tax Facility Availability Line of Credit Facility, Remaining Borrowing Capacity Pacific Casualty Insurance Company, LLC Pacific Casualty Insurance Company, LLC [Member] Pacific Casualty Insurance Company, LLC Regulatory Balancing Accounts Receivable Regulatory Balancing Accounts Receivable [Member] The Utility records differences between (1) authorized revenue requirements and actual customer billings, and (2) between incurred costs and customer billings. To the extent these differences are probable of recovery over the next 12 months, the Utility records a current regulatory balancing account receivable. Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Customer credit trust Customer credit trust Customer Credit Trust Customer Credit Trust Total Derivative Balance, Liabilities Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Wildfire Recovery Compensation Program Wildfire Recovery Compensation Program [Member] Wildfire Recovery Compensation Program Accrued legal liabilities Accrued Legal Liabilities Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to claims and litigation, regulatory proceedings, penalties and other legal matters. Operating Income Operating Income (Loss) Schedule of Dividend Paid on Common Stock Dividends Declared [Table Text Block] Wildfire-related claims, net of recoveries Wildfire-related claims, net of recoveries Loss From Catastrophes (Gain From Insurance Recovery) Loss From Catastrophes (Gain From Insurance Recovery) Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] SB 901 securitization regulatory asset Regulatory Asset [Roll Forward] Regulatory Asset Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Service cost for benefits earned Defined Benefit Plan, Service Cost Current Regulatory Balancing Accounts Payable Schedule of Current Regulatory Balancing Accounts Payable [Table Text Block] Government Assistance Government Assistance [Policy Text Block] Public purpose programs Public Purpose Programs [Member] The public purpose programs balancing accounts primarily track the recovery of the authorized public purpose program revenue requirements, the actual costs of such programs, and incentive awards earned by the Utility for implementing customer energy efficiency programs. Product and Service [Domain] Product and Service [Domain] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Disallowance cap, transmission and distribution equity rate base Loss Contingency, Disallowance Cap, Transmission And Distribution Equity Rate Base Loss Contingency, Disallowance Cap, Transmission And Distribution Equity Rate Base Deferred income taxes Deferred income taxes Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Natural gas Natural Gas, US Regulated [Member] Termination Date Trading Arrangement Termination Date Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Interim rate relief Gain Contingency, Interim Rate Relief, Value Gain Contingency, Interim Rate Relief, Value Pension and other postretirement benefit plans obligations (net of taxes of $0, $0, $0, and $0 respectively) Pension and other postretirement benefit plans obligations (net of taxes of $0, $0, $0, and $0 respectively) Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Total Derivative Balance, Assets Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Other Other Other Liabilities, Current Fair Value as of Grant Date Award Grant Date Fair Value Regulatory Balancing Accounts Payable Regulatory Balancing Accounts Payable [Member] The Utility records differences between (1) authorized revenue requirements and actual customer billings, and (2) between incurred costs and customer billings. To the extent these differences are probable of refund over the next 12 months, the Utility records a current regulatory balancing account payable. Gas Safety Costs Interim Rate Relief Gas Safety Costs Interim Rate Relief [Member] Gas Safety Costs Interim Rate Relief Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Total operating expenses Operating Costs and Expenses Arrangement Duration Trading Arrangement Duration Entity Registrant Name Entity Registrant Name Entity Address, Postal Zip Code Entity Address, Postal Zip Code Performance-Based Disbursement Performance-Based Disbursement [Member] Performance-Based Disbursement Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Insurance receivable, beginning balance Insurance receivable, ending balance Insurance receivable Insurance Settlements Receivable Total operating revenues Total operating revenues Revenues Regulatory balancing accounts Regulatory balancing accounts Regulatory Balancing Accounts Liabilities Regulatory balancing accounts record the differences between revenues and costs that can be recovered through rates. Sales balancing accounts accumulate differences between revenues and authorized revenue requirements. Cost balancing accounts accumulate differences between incurred costs and authorized revenue requirements. Under-collections that are probable of recovery through regulated rates are recorded as regulatory balancing account assets. Over-collections that are probable of being credited to customers are recorded as regulatory balancing account liabilities. Assets measured at NAV Alternative Investment Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Operating Expenses Operating Expenses Operating Costs and Expenses [Abstract] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Included in regulatory assets and liabilities or balancing accounts Fair Value, Net Derivative Asset (Liability) Measured On Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included In Regulatory Assets And Liabilities Fair value measurement with unobservable inputs reconciliation recurring basis liability gain loss included in regulatory assets liabilities. Assets and Liabilities Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] All Award Types Award Type [Domain] Initial safety certification, period Loss Contingency, Initial Safety Certification, Period Loss Contingency, Initial Safety Certification, Period FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Self insurance deductible, percent Liability Insurance Coverage, Deductible, Percentage Liability Insurance Coverage, Deductible, Percentage Nuclear Insurance Coverage [Axis] Nuclear Insurance Coverage [Axis] Nuclear insurance coverage axis. Geographical [Axis] Geographical [Axis] National Park National Park [Member] National Park Assets measured at NAV Fair Value Measured at Net Asset Value Per Share [Member] Legal Entity [Axis] Legal Entity [Axis] Interest expense Interest Expense, Debt DWR Loan DWR Loan [Member] DWR Loan Cash, cash equivalents, restricted cash, and restricted cash equivalents at January 1 Cash, cash equivalents, restricted cash, and restricted cash equivalents at June 30 Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash Collateral Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset FERC TO rates FERC [Member] FERC Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Non-NEOs Non-NEOs [Member] Financial Assets Measured at Amortized Cost – Credit Losses Credit Loss, Financial Instrument [Policy Text Block] Customer [Domain] Customer [Domain] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Schedule of Regulatory Liabilities [Table] Regulated Operation, Regulatory Liability [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Reinvested earnings Reinvested earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Nuclear Incident Nuclear Incident [Member] Nuclear Incident Member. Recorded expenditures, expenses Gain Contingency, Expenses For Future Recovery Gain Contingency, Expenses For Future Recovery Global equity securities Equity Securities, FV-NI Environmental compliance costs Environmental Compliance Costs [Member] The regulatory asset for environmental compliance costs represents the cumulative differences between amounts recognized for ratemaking purposes and amounts recognized in accordance with GAAP. The Utility expects to recover these costs over the next 32 years, as the environmental compliance work is performed Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Pension Benefits Pension Plan [Member] Common Stock Common Stock [Member] Total Fair Value Total maturities of fixed-income securities Debt Securities, Available-for-Sale Wildfire Fund expense Wildfire Fund expense Amortization and accretion Litigation Settlement, Fee Expense Derivative Contract [Domain] Derivative Contract [Domain] Agricultural Agricultural [Member] Agricultural [Member] First Mortgage Bonds Due 2031 First Mortgage Bonds Due 2031 [Member] First Mortgage Bonds Due 2031 TOTAL LIABILITIES AND EQUITY Liabilities and Equity Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Employee Stock Option Share-Based Payment Arrangement, Option [Member] Noncontrolling Interest - Preferred Stock of Subsidiary Equity, Attributable to Noncontrolling Interest Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Asset Class [Axis] Asset Class [Axis] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Schedule Of Changes In Equity [Line Items] Schedule Of Changes In Equity [Line Items] [Line Items] for Schedule Of Changes In Equity [Table] Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Market approach Valuation, Market Approach [Member] Property, Plant, and Equipment Property, Plant, and Equipment Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization [Abstract] Materials and supplies Materials and supplies Inventory, Raw Materials and Supplies, Gross Preferred stock dividend requirement Preferred stock dividend requirement Preferred Stock Dividends and Other Adjustments Mandatory convertible preferred stock Preferred stock Preferred Stock, Value, Issued Senate Bill 846 Senate Bill 846 [Member] Senate Bill 846 Adjustment to Compensation: Adjustment to Compensation [Axis] Other (net of allowance for doubtful accounts of $19 million and $69 million at respective dates) Other (net of allowance for doubtful accounts of $19 million and $69 million at respective dates) Other Receivables, Gross, Current Amounts reclassified from other comprehensive income Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Total price risk management instruments Price Risk Derivative, Electricity and Gas [Member] Price Risk Derivative, Electricity and Gas Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest, net of amounts capitalized Interest, net of amounts capitalized Interest Paid, Excluding Capitalized Interest, Operating Activity Number of structures damaged (structure) Number Of Structures Damaged Number of structures reported damaged in the Butte fire TOTAL ASSETS Assets, Fair Value Disclosure SB 901 securitization SB 901 Securitization [Member] SB 901 Securitization First preferred stock, cumulative, par value $25 per share, 4.36% series A redeemable First Preferred Stock, Cumulative, Par Value $25 Per Share, 4.36% Series A Redeemable [Member] First Preferred Stock, Cumulative, Par Value $25 Per Share, 4.36% Series A Redeemable [Member] Name Measure Name Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Additional Paid-in Capital Additional Paid-in Capital [Member] Schedule of Unrealized Gains (Losses) Related to Available-for-sale Investments Schedule Of Unrealized Gains Losses Related To Available For Sale Investments [Table Text Block] Schedule of Unrealized Gains Losses Related To Available For Sale Investments CRR auction prices Measurement Input, Commodity Market Price [Member] Other Other Regulatory Assets (Liabilities) [Member] Price risk management instruments, netting Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset 2019 Kincade Fire Kincade Fire, 2019 [Member] Kincade Fire, 2019 Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and cash equivalents at June 30 Cash and cash equivalents Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount Schedule Of Government Assistance Schedule Of Government Assistance [Table Text Block] Schedule Of Government Assistance Claims paid by Wildfire Fund Loss Contingency, Wildfire Fund Payment For Claims Loss Contingency, Claims Paid By Wildfire Fund Non-PEO NEO Non-PEO NEO [Member] Common stock issued, net Stock Issued During Period, Value, New Issues, Net of Adjustments Stock Issued During Period, Value, New Issues, Net of Adjustments Wildfire self-insurance Wildfire Self-Insurance [Member] Wildfire Self-Insurance Cost of electricity and natural gas Cost of Product and Service Sold Other Noncurrent Assets Other Noncurrent Assets Regulated Entity, Other Assets, Noncurrent [Abstract] Award Timing Method Award Timing Method [Text Block] Gas Price Risk Derivative, Gas [Member] Price Risk Derivative, Gas [Member] Net change in cash, cash equivalents, restricted cash, and restricted cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Amortization of net actuarial loss (gain) Defined Benefit Plan, Amortization of Gain (Loss) Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Number of fatalities (fatality) Number Of Deaths Number of deaths reported in the Butte fire Wildfire-related claims Wildfire-related claims Wildfire-related Claims Wildfire-related Claims Restatement Determination Date: Restatement Determination Date [Axis] Electricity Price Risk Derivative, Electricity [Member] Price Risk Derivative, Electricity [Member] Amount of property damage and business interruption coverage Property Damage And Business Interruption Coverage Per Incident Property damage and business interruption coverage per nuclear incident provided by nuclear insurance Insurance Insurance [Member] Insurance Operating Revenues Operating Revenues Revenues [Abstract] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Numerator: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Purchases of customer credit investments Payments to Acquire Retained Interest in Securitized Receivables Net unrealized gain (losses) on available for sale securities, tax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax Statistical Measurement [Domain] Statistical Measurement [Domain] Loss contingency, expected capitalization, additional contributed by the utilities Loss Contingency, Expected Capitalization, Additional Contributed By Utilities Loss Contingency, Expected Capitalization, Additional Contributed By Utilities Document Fiscal Year Focus Document Fiscal Year Focus Netting, Liabilities Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Litigation settlement loss Litigation Settlement, Loss Investments, Owned, Federal Income Tax Note [Line Items] Investments, Owned, Federal Income Tax Note [Line Items] Customer [Axis] Customer [Axis] Common stock, no par value, authorized 3,600,000,000 and 3,600,000,000 shares at respective dates; 2,202,366,726 and 2,197,942,874 shares outstanding at respective dates Common stock, $5 par value, authorized 800,000,000 shares; 800,000,000 shares outstanding at respective dates Common Stock, Value, Issued Period for probable revenue recovery Regulated Operating Revenue, Expected Collection Period Regulated Operating Revenue, Expected Collection Period Restatement Determination Date Restatement Determination Date Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Stock-based compensation amortization Stock Based Compensation Amortization Stock Based Compensation Amortization Regulatory liabilities Regulatory liabilities Total noncurrent regulatory liabilities Beginning balance Ending balance Regulatory Liability, Noncurrent Amendment Flag Amendment Flag Nuclear Electric Insurance Limited and European Mutual Association for Nuclear Insurance Nuclear Electric Insurance Limited and European Mutual Association for Nuclear Insurance [Member] Nuclear Electric Insurance Limited and European Mutual Association for Nuclear Insurance Current Liabilities Current Liabilities Liabilities, Current [Abstract] Bad debt expense Bad debt expense Accounts Receivable, Credit Loss Expense (Reversal) Total Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Financing lease ROU asset and other Financing lease ROU asset and other Finance Lease, Right-of-Use Asset, before Accumulated Amortization Loss Contingencies [Table] Loss Contingencies [Table] Catastrophic event memorandum account Catastrophic Event Memorandum Account [Member] Catastrophic Event Memorandum Account [Member] Total noncurrent liabilities Liabilities, Noncurrent Other Other Accounts Payable, Other, Current Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province Capital expenditures financed through current assets and noncurrent liabilities Capital Expenditures Financed Through Current Assets and Non-current Assets Capital Expenditures Financed Through Current Assets and Non-current Assets PEO Total Compensation Amount PEO Total Compensation Amount Assets: Assets, Fair Value Disclosure [Abstract] Debt [Table] Debt [Table] Debt [Table] Forward prices Measurement Input, Commodity Forward Price [Member] Weighted Average Common Shares Outstanding, Basic (in shares) Weighted average common shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Price risk management Price Risk Management [Member] Derivative instrument whose primary underlying is tied to price risk. Includes physical and financial derivative contracts, forwards, swaps, options and congestion revenue rights that are traded either on an exchange or over the counter. Regulatory assets Regulatory assets Total noncurrent regulatory assets Beginning balance Ending balance Regulatory Asset, Noncurrent Loss Contingencies [Line Items] Loss Contingencies [Line Items] First preferred stock, cumulative, par value $25 per share, 6% nonredeemable First Preferred Stock, Cumulative, Par Value $25 Per Share, 6% Nonredeemable [Member] First Preferred Stock, Cumulative, Par Value $25 Per Share, 6% Nonredeemable [Member] European Mutual Association for Nuclear Insurance European Mutual Association for Nuclear Insurance [Member] European Mutual Association for Nuclear Insurance provides excess insurance coverage for property damages and business interruption losses incurred by the Utility if a nuclear or non-nuclear event were to occur at Diablo Canyon. Regulatory Liability [Axis] Regulatory Liability [Axis] Price Risk Management Instruments Price Risk Management Instruments [Member] Level 3 price risk management instruments 5–10 years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Amortization Amortization of Regulatory Liability Amortization of Regulatory Liability Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Forwards, futures, and swaps Forwards Futures Swaps [Member] Forwards Futures Swaps [Member] Allowance for doubtful accounts, noncurrent Accounts Receivable, Allowance for Credit Loss, Noncurrent Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Mandatory convertible preferred stock dividends paid Preferred stock dividends paid Payments of Ordinary Dividends, Preferred Stock and Preference Stock Class of Stock [Axis] Class of Stock [Axis] Income Available for Common Shareholders Income Available for Common Shareholders Net Income (Loss) Available to Common Stockholders, Basic First Mortgage Bonds Due 2036 First Mortgage Bonds Due 2036 [Member] First Mortgage Bonds Due 2036 Maximum Facility Limit Line of Credit Facility, Maximum Borrowing Capacity Long-term debt, classified as current (includes $226 million and $221 million related to VIEs at respective dates) Long-term debt, classified as current Long-term debt, classified as current (includes $226 million and $221 million related to VIEs at respective dates) Long-Term Debt, Current Maturities Transportation service only Transportation Service [Member] Transportation Service [Member] Repayments of recovery bonds Repayments of Recovery Bonds Repayments of Recovery Bonds Preferred stock dividend requirement of subsidiary Aggregate amount, preferred stock Dividends, Preferred Stock Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Recently Adopted Accounting Standards and Accounting Standards Issued But Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Litigation Case [Axis] Litigation Case [Axis] Capital expenditures financed through accounts payable Capital expenditures financed through accounts payable Capital Expenditures Incurred but Not yet Paid Non- controlling Interest - Preferred Stock  of Subsidiary Noncontrolling Interest [Member] Debt financial instrument Long-Term Debt Litigation liability, current Estimated Litigation Liability, Current Effect of changes in operating assets and liabilities: Effect of changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Amount attributable to tax, before reclassification OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, Tax Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] EQUITY Equity [Text Block] Security Exchange Name Security Exchange Name Price risk management instruments, netting Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset Current Regulatory Balancing Accounts Receivable Schedule Of Current Regulatory Balancing Accounts Receivable [Table Text Block] The amount for the individual regulatory balancing accounts as itemized in a table of regulatory balancing accounts as of the end of the period. Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] TOTAL LIABILITIES Liabilities, Fair Value Disclosure Interest payable (includes $70 million and $72 million related to VIEs at respective dates) Interest payable Interest payable (includes $70 million and $72 million related to VIEs at respective dates) Interest Payable, Current Segment Reporting Segment Reporting, Policy [Policy Text Block] Loss contingency, estimate for life Loss Contingency, Estimate for Life Loss Contingency, Estimate for Life Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Name Outstanding Recovery, Individual Name Regulatory balancing accounts Regulatory balancing accounts Regulatory Balancing Accounts Assets Regulatory balancing accounts are used to accumulate differences between revenues and authorized revenue requirements and to accumulate differences between incurred costs and costs recovered. Regulatory balancing accounts receivable represents under-collections that are probably of recovery through regulated rates and are expected to be recovered within the next 12 months. Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Wildfire fund receivable, beginning balance Wildfire fund receivable, ending balance Loss Contingency, Wildfire Fund Recoveries Receivable Wildfire Fund Receivable Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Entity Bankruptcy Proceedings, Reporting Current Entity Bankruptcy Proceedings, Reporting Current Geographical [Domain] Geographical [Domain] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Schedule of Available for Sale Securities Table Schedule Of Available For Sale Securities Table [Table Text Block] Schedule Of Available For Sale Securities Table [Text Block] Maximum disbursement Government Assistance, Maximum Amount Government Assistance, Maximum Amount 2022 Mosquito fire Mosquito Fire, 2022 [Member] Mosquito Fire, 2022 Net unrealized gains (losses) on available-for-sale securities (net of taxes of $1, $3, $4, and $5 respectively) Net unrealized gains (losses) on available-for-sale securities (net of taxes of $1, $3, $4, and $5 respectively) OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Insurance Receivable [Roll Forward] Insurance Receivable [Roll Forward] Insurance Receivable [Roll Forward] Long-term debt, gross Loans Outstanding Long-Term Debt, Gross Receivables Securitization Program - Stated Maturity: 2027 Receivables Securitization Program [Member] Receivables Securitization Program Allowance for equity funds used during construction Allowance for equity funds used during construction Increase (Decrease) in Allowance for Equity Funds Used During Construction Amortization of regulatory asset and liability Amortization of Regulatory Asset and Liability Amortization of Regulatory Asset and Liability Asset Class [Domain] Asset Class [Domain] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Weighted Average Common Shares Outstanding, Diluted (in shares) Weighted average common share outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Deferred income taxes Deferred Income Tax Charge [Member] Pension and other postretirement benefits Pension and other postretirement benefits Liability, Defined Benefit Plan, Noncurrent Use of Derivative Instruments Derivatives, Policy [Policy Text Block] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Borrowings under credit facilities Borrowings under credit facilities Proceeds from Lines of Credit Net property, plant, and equipment Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization DERIVATIVES Derivative Instruments and Hedging Activities Disclosure [Text Block] Regulatory Asset [Axis] Regulatory Asset [Axis] Equity contribution Adjustments To Additional Paid In Capital, Contribution From Parent Adjustments To Additional Paid In Capital, Contribution From Parent Fixed-income securities Corporate Debt Securities, Fair Value Disclosure Represents the fair value of trust assets held in corporate securities Self insurance amount Liability Insurance Coverage, Rate Liability Insurance Coverage, Rate Short-term borrowings Short-term borrowings Short-Term Debt Gross Derivative Balance, Liabilities Derivative Liability, Subject to Master Netting Arrangement, before Offset Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Letters of Credit Outstanding Letters of Credit Outstanding, Amount Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Convertible Notes due 2027 Convertible Notes Due 2027 [Member] Convertible Notes Due 2027 All Executive Categories All Executive Categories [Member] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] National Forrest National Forrest [Member] National Forrest Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Repayments under term loan Repayments of Long-Term Lines of Credit Other Comprehensive Income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Schedule of Net Benefit Costs Schedule of Net Benefit Costs [Table Text Block] Wildfire-Related Class Action Wildfire-Related Class Action [Member] Wildfire-Related Class Action 6.000% Series A Mandatory Convertible Preferred Stock, no par value 6.000% Series A Mandatory Convertible Preferred Stock [Member] 6.000% Series A Mandatory Convertible Preferred Stock Topock natural gas compressor station Topock Natural Gas Compressor Station Utility-Owned Natural Gas Compressor Site Near Topock, Arizona Insurance receivable Liability Insurance Coverage, Insurance Receivable Liability Insurance Coverage, Insurance Receivable First preferred stock, cumulative, par value $25 per share, 4.80% redeemable First Preferred Stock, Cumulative, Par Value $25 Per Share, 4.80% Redeemable [Member] First Preferred Stock, Cumulative, Par Value $25 Per Share, 4.80% Redeemable [Member] Non-Nuclear Incident Non Nuclear Incident [Member] Non Nuclear Incident Member. Residential uncollectibles balancing accounts Residential Uncollectibles Balancing Accounts [Member] Residential Uncollectibles Balancing Accounts Debt Disclosure [Abstract] Debt Disclosure [Abstract] Expected capitalization, annual contribution Loss Contingency, Expected Capitalization, Annual Contribution Loss Contingency, Expected Capitalization, Annual Contribution Minimum Minimum [Member] Common stock, no par value Common Stock, No Par Value [Member] Common Stock, No Par Value [Member] Regulatory assets, liabilities, and balancing accounts, net Regulatory assets, liabilities, and balancing accounts, net Regulatory Assets Liabilities And Balancing Accounts Net The change in individual regulatory asset, liability or balancing account at the end of the period, net. Gain Contingency, Nature [Domain] Gain Contingency, Nature [Domain] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Price risk management instruments, gross subject to netting Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement Summary of Revenues Disaggregated by Type of Customer Disaggregation of Revenue [Table Text Block] Denominator: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] AB 1054 Recovery Bonds Wildfire Fund AB 1054 Wildfire Fund [Member] AB 1054 Wildfire Fund Common stock dividends declared Common stock dividend Aggregate amount, common stock Dividends, Common Stock Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Litigation payment Loss Contingency, Settlement, Amount Loss Contingency, Settlement, Amount Common stock, shares authorized (in shares) Common Stock, Shares Authorized Finite-lived intangible asset, useful life Intangible Asset, Finite-Lived, Useful Life Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Gross realized gains on securities Debt Securities, Available-for-Sale, Realized Gain First preferred stock, cumulative, par value $25 per share, 4.50% redeemable First Preferred Stock, Cumulative, Par Value $25 Per Share, 4.50% Redeemable [Member] First Preferred Stock, Cumulative, Par Value $25 Per Share, 4.50% Redeemable [Member] First preferred stock, cumulative, par value $25 per share, 5% nonredeemable First Preferred Stock, Cumulative, Par Value $25 Per Share, 5% Nonredeemable [Member] First Preferred Stock, Cumulative, Par Value $25 Per Share, 5% Nonredeemable [Member] Total purchase commitments Recorded Unconditional Purchase Obligation More than 10 years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Exercise Price Award Exercise Price Estimated insurance recoveries Estimated Insurance Recoveries Schedule of Activity for Debt and Equity Securities Summary Of Activity For Available For Sale Securities [Table Text Block] Schedule of activity for debt and equity securities Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Additional contributions funded by tax benefits Additional Shareholder Contribution Funded by Tax Benefits, Amount, Securitization Additional Shareholder Contribution Funded by Tax Benefits, Amount, Securitization Government Assistance, Liability [Roll Forward] Government Assistance, Liability [Roll Forward] Government Assistance, Liability Range (in dollars per mwh) Derivative Asset (Liability) Net, Measurement Input Location Site [Domain] Location Site [Domain] Location Site [Domain] Repayments of long-term debt Repayments of long-term debt Repayments of Long-Term Debt Total deduction Government Assistance, Liability, Decrease Options Options Held [Member] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component [Domain] Equity Component [Domain] Measurement Input Type [Domain] Measurement Input Type [Domain] Adoption Date Trading Arrangement Adoption Date Counterparty Name [Domain] Counterparty Name [Domain] Formula Rate [Axis] Formula Rate [Axis] Formula Rate Number of public entities Loss Contingency, Number of Public Entities Loss Contingency, Number of Public Entities CPUC CPUC [Member] CPUC Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Type of Insurance Coverage [Domain] Type Insurance Coverage [Domain] Type of Insurance Coverage Domain Nuclear Electric Insurance Limited Nuclear Electric Insurance Limited [Member] Nuclear Electric Insurance Limited is a mutual insurer owned by utilities with nuclear facilities. Other Other Proceeds from (Payment for) Other Financing Activity Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Damages awarded Loss Contingency, Damages Awarded, Value Schedule of Line of Credit Facilities Schedule of Line of Credit Facilities [Table Text Block] Electric transmission Electric Transmission [Member] NYSE American LLC NYSE AMERICAN LLC [Member] NYSE AMERICAN LLC [Member] WILDFIRE-RELATED CONTINGENCIES OTHER CONTINGENCIES AND COMMITMENTS Commitments and Contingencies Disclosure [Text Block] Wildfire Fund asset Wildfire Fund asset Litigation Asset, Noncurrent Litigation Asset, Noncurrent Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Construction work in progress Construction work in progress Construction in Progress, Gross Weighted average price Weighted Average [Member] Wildfire-related accounts Wildfire Mitigation Balancing Account [Member] Wildfire Mitigation Balancing Account All Adjustments to Compensation All Adjustments to Compensation [Member] Other Other Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Shareholders’ Equity Shareholders’ Equity Equity, Attributable to Parent [Abstract] Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Initial shareholder contribution Initial Shareholder Contribution, Amount, Securitization Initial Shareholder Contribution, Amount, Securitization City Area Code City Area Code Amortization of prior service cost (gain) Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] Employee benefit plans Postretirement Benefit Costs [Member] Total property, plant, and equipment Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Name Forgone Recovery, Individual Name Loss Contingency Accrual [Roll Forward] Loss Contingency Accrual [Roll Forward] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Transmission tower wireless licenses Tower Licenses [Member] Tower Licenses Entity [Domain] Entity [Domain] Depreciation, amortization, and decommissioning Depreciation, amortization, and decommissioning Depreciation Amortization Decommissioning Income Statement The current period expense, as reported in the income statement, charged against earnings on long-lived, physical assets used in the normal conduct of business and not intended for resale to allocate or recognize the cost of assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset. Examples include buildings, production equipment and customer lists. Disbursement Government Assistance, Income, Increase (Decrease) Amortization of prior service cost (credit) Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Unrealized gain (loss) on investments OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, after Tax Common stock issued, net (in shares) Stock Issued During Period, Shares, New Issues Electric distribution Distribution Revenue Adjustment Mechanism [Member] The distribution revenue adjustment mechanism balancing account is used to record and recover the authorized electric distribution revenue requirements and certain other electric distribution-related authorized costs. The New York Stock Exchange NEW YORK STOCK EXCHANGE, INC. [Member] Liability insurance coverage, insurance receivable. fully recoveries Liability Insurance Coverage, Insurance Receivable, Amount Received Liability Insurance Coverage, Insurance Receivable, Amount Received Measurement Basis [Axis] Measurement Basis [Axis] Netting, Assets Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Location, Statement of Financial Position, Activity, Capitalization [Axis] Location, Statement of Financial Position, Activity, Capitalization [Axis] Less than 1 year Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Subsequent Event Type [Domain] Subsequent Event Type [Domain] Mandatory convertible preferred stock Series A Preferred Stock [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Fair Value Measurement Inputs and Valuation Techniques Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Disaggregation of Revenue [Abstract] Disaggregation of Revenue [Abstract] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Number of structures destroyed (structure) Loss Contingency, Number Of Structures Destroyed Loss Contingency, Number Of Structures Destroyed Liabilities: Liabilities, Fair Value Disclosure [Abstract] Operating and maintenance Operating and maintenance Utilities Operating Expense, Maintenance and Operations Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Wildfire-related claims Wildfire-related claims Increase (Decrease) To Catastrophes Related Third Party Claims Increase (Decrease) To Catastrophes Related Third Party Claims Hinkley natural gas compressor station Hinkley Natural Gas Compressor Station Utility-Owned Natural Gas Compressor Site Near Hinkley, California Regulatory Assets [Line Items] Regulatory Asset [Line Items] Interest cost Defined Benefit Plan, Interest Cost Other, net Other Customers [Member] Other Customers [Member] Financial Instruments [Domain] Financial Instruments [Domain] Wildfire Fund Asset Wildfire Fund Asset [Member] Wildfire Fund Asset Price risk management instruments, assets Assets Derivative Asset Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Nuclear decommissioning trusts Nuclear decommissioning trusts Decommissioning Fund Investments Underlying Securities Award Underlying Securities Amount Fair Value Estimate of Fair Value Measurement [Member] Self insurance deductible maximum Liability Insurance Coverage, Deductible, Maximum Liability Insurance Coverage, Deductible, Maximum Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Amount of property damage coverage provided by NEIL Property Damage Coverage Per Incident Property damage coverage per nuclear incident provided by nuclear insurance Derivative Asset, Statement of Financial Position [Extensible Enumeration] Derivative Asset, Statement of Financial Position [Extensible Enumeration] Remaining value recoverable Gain Contingency, Interim Rate Relief, Value To Be Recovered Gain Contingency, Interim Rate Relief, Value To Be Recovered Preferred Stock Preferred Stock [Member] Other Other Payment for (Proceeds from) Other Investing Activity Inventories Inventories Increase (Decrease) in Inventories Percentage of fire contained Loss Contingency, Percentage of Fire Contained Loss Contingency, Percentage of Fire Contained Contract Volume Derivative, Number of Instruments Held Accrued insurance recoveries Increase (Decrease) in Estimated Insurance Recoveries Increase (Decrease) in Estimated Insurance Recoveries Other Other Other Assets, Current Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Current Fiscal Year End Date Current Fiscal Year End Date Number of complaints (complaint) Loss Contingency, Number of Complaints Loss Contingency, Number of Complaints Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Derivative [Line Items] Derivative [Line Items] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Amount per Share, common stock (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Proceeds from sales and maturities of self-insurance investments Proceeds from Life Insurance Policy Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Amount per Share, preferred stock (in dollars per share) Preferred Stock, Dividends Per Share, Declared Measure: Measure [Axis] Wildfire self-insurance asset Self Insurance Asset, Current Self Insurance Asset, Current First Mortgage Bonds Due 2029 First Mortgage Bonds Due 2029 [Member] First Mortgage Bonds Due 2029 Asset retirement obligations Asset retirement obligations Asset Retirement Obligations, Noncurrent Cost of removal obligations Cost Of Removal Obligation [Member] Cost Of Removal Obligation [Member] First Mortgage Bonds Due 2056 First Mortgage Bonds Due 2056 [Member] First Mortgage Bonds Due 2056 Equity Components [Axis] Equity Components [Axis] Income taxes, net Income Tax Paid, after Refund Received Entity Interactive Data Current Entity Interactive Data Current Number of commercial residential structures destroyed (structure) Loss Contingency, Number Of Commercial Residential Structures Destroyed Loss Contingency, Number Of Commercial Residential Structures Destroyed Equity contribution from PG&E Corporation Proceeds from Contributions from Parent Entity Small Business Entity Small Business 2021 Dixie fire Dixie Fire, 2021 [Member] Dixie Fire, 2021 MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other (includes noncurrent accounts receivable of $77 million and $67 million related to VIEs, net of noncurrent allowance for doubtful accounts of $19 million and $15 million at respective dates) Other (includes noncurrent accounts receivable of $77 million and $67 million related to VIEs, net of noncurrent allowance for doubtful accounts of $19 million and $15 million at respective dates) Other Assets, Noncurrent Interim revenue requirement Gain Contingency, Cost Recovery, Revenue Requirement Gain Contingency, Cost Recovery, Revenue Requirement Cash Flows from Financing Activities Cash Flows from Financing Activities Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract] Document Type Document Type Percentage of common stock owned, Fire Victim Trust if common issues additional shares Percentage of Common Stock Owned, Litigation Settlement If Common Issues Additional Shares Percentage of Common Stock Owned, Litigation Settlement, If Company Issues Additional Shares Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Site Contingency [Line Items] Site Contingency [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Local Phone Number Local Phone Number Other Benefits Other Postretirement Benefits Plan [Member] Nuclear decommissioning adjustment mechanism Nuclear Decommissioning Adjustment Mechanism [Member] Nuclear Decommissioning Adjustment Mechanism Income Before Income Taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Property, Plant, and Equipment Property, Plant, and Equipment Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Executive Category: Executive Category [Axis] Change in performance-based disbursements deferred Government Assistance, Liability Increase (Decrease) Government Assistance, Liability Increase (Decrease) Wildfire fund, noncurrent Estimated Litigation Liability, Noncurrent Long-term Purchase Commitment [Table] Long-Term Purchase Commitment [Table] Humboldt Bay Unit Humboldt Bay Unit [Member] Humboldt Bay Unit [Member] Amount attributable to tax, reclassification Other Comprehensive Income (Loss), Tax Counterparty Name [Axis] Counterparty Name [Axis] LIABILITIES AND EQUITY LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] Utility-owned generation facilities (other than fossil fuel-fired), other facilities, and third-party disposal sites Utility Owned Generation Facilities Other Than For Fossil Fuel Fired Other Facilities And Third Party Disposal Sites Utility-Owned Generation Facilities (Other Than For Fossil Fuel-Fired), Other Facilities, And Third-Party Disposal Sites Gas stored underground and fuel oil Gas stored underground and fuel oil Inventory, Net Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Total other noncurrent assets Regulated Entity, Other Assets, Noncurrent Supplemental disclosures of cash flow information Supplemental Cash Flow Information [Abstract] Loss contingency, costs incurred Loss Contingency, Costs Incurred Loss Contingency, Costs Incurred PEO Name PEO Name Fixed-to-Fixed Reset Rate Junior Subordinated Notes Due 2056 Fixed-to-Fixed Reset Rate Junior Subordinated Notes Due 2056 [Member] Fixed-to-Fixed Reset Rate Junior Subordinated Notes Due 2056 Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Income tax deduction, repair costs Income Tax Deduction, Repair Costs Income Tax Deduction, Repair Costs Entity Tax Identification Number Entity Tax Identification Number Long-Term Regulatory Liabilities Schedule Of Long Term Regulatory Liabilities [Table Text Block] Schedule Of Long Term Regulatory Liabilities Number of first responder injuries (injury) Loss Contingency, Number Of First Responder Injuries Loss Contingency, Number Of First Responder Injuries Accounts payable Accounts payable Increase (Decrease) in Accounts Payable Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Short-term investments Money Market Investments [Member] Money Market Investments [Member] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Common stock, shares issued, not disclosed Common Stock, Shares Issued, Not Disclosed Common Stock, Shares Issued, Not Disclosed ORGANIZATION AND BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Comprehensive Income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] SB 901 Securitization Inception SB 901 Securitization Inception [Member] SB 901 Securitization Inception Performance-Based Disbursements Government Assistance, Performance-Based Disbursements [Member] Government Assistance, Performance-Based Disbursements Net Income Per Common Share, Basic (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Nothern California Wild Fire Nothern California Wild Fire [Member] Nothern California Wild Fire [Member] Total current assets Assets, Current Insider Trading Arrangements [Line Items] Volumes of Outstanding Derivative Contracts Volume Of Outstanding Derivative Contracts [Table Text Block] Volume of outstanding derivative contracts Utility Pacific Gas & Electric Co [Member] Pacific Gas & Electric Co [Member] Long-term debt (includes $11.6 billion and $11.7 billion related to VIEs at respective dates) Long-term debt Long-term debt (includes $11.6 billion and $11.7 billion related to VIEs at respective dates) Long-Term Debt, Excluding Current Maturities Public street and highway lighting Public Street And Highway Lighting [Member] Public Street And Highway Lighting [Member] Customers (net of allowance for doubtful accounts of $402 million and $408 million at respective dates) (includes $1.6 billion and $1.9 billion related to VIEs, net of allowance for doubtful accounts of $400 million and $408 million at respective dates) Accounts receivable, after allowance for credit loss, current Customers (net of allowance for doubtful accounts of $402 million and $408 million at respective dates) (includes $1.6 billion and $1.9 billion related to VIEs, net of allowance for doubtful accounts of $400 million and $408 million at respective dates) Accounts Receivable, after Allowance for Credit Loss, Current Premium, discount, and issuance costs on proceeds from long-term debt Long Term Debt Discount And Issuance Costs The cash inflow from borrowings payable greater than 12 months, net of premium, discount and cash paid to third parties in connection with debt origination Commodity Contract Commodity Contract [Member] Initial safety certification, documentation provided, period Loss Contingency, Initial Safety Certification, Documentation Provided, Period Loss Contingency, Initial Safety Certification, Documentation Provided, Period Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Insurance coverage, loss Loss Contingency, Insurance Coverage, Loss Loss Contingency, Insurance Coverage, Loss Fair Value Measurement [Domain] Fair Value Measurement [Domain] Recorded expenditures, capital expenditures Gain Contingency, Capital Expenditures For Future Recovery Gain Contingency, Capital Expenditures For Future Recovery Loss contingency, expected capitalization, contributed by the utilities Loss Contingency, Expected Capitalization, Contributed By Utilities Loss Contingency, Expected Capitalization, Contributed By Utilities Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Number of injuries Loss Contingency, Number Of Injuries Loss Contingency, Number Of Injuries Total regulatory balancing accounts Total Current Regulatory Balancing Accounts The utilities current regulatory balancing accounts represent the amounts expected to be received from or refunded to the utilities customers through authorized rate adjustments within the next 12 months. Preferred stock dividend requirement Comprehensive Income (Loss), Preferred Stock Dividend Requirement Of Subsidiary Represents dividends paid by the Utility to shareholders of outstanding preferred stock Proceeds from issuance of long-term debt, net of premium, discount and issuance costs of $33 and $27 at respective dates Proceeds from issuance of long-term debt, net of premium, discount and issuance costs of $23 and $27 at respective dates Proceeds from Issuance of Other Long-Term Debt Equity Awards Adjustments Equity Awards Adjustments [Member] Long-term disability trust Long Term Disability Trust [Member] LTD is one of PG&E's benefit plans, they are composed primarily of equity securities, debt securities, and life insurance policies Self-insurance investments Pacific Energy Risk Solutions, LLC [Member] Pacific Energy Risk Solutions, LLC Regulatory Asset [Domain] Regulatory Asset [Domain] Nuclear decommissioning trusts Nuclear Decommissioning Trust [Member] Nuclear Decommissioning Trust [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Electric Electricity (MWh) Electricity [Member] Accrued Losses Loss Contingency Accrual, Loss (Reversal of Loss) Loss contingency, expected capitalization, non-bypassable charge from customers Loss Contingency, Expected Capitalization, Non-Bypassable Charge From Customers Loss Contingency, Expected Capitalization, Non-Bypassable Charge From Customers Location Site [Axis] Location Site [Axis] Location Site Other income, net Other income, net Other Nonoperating Income (Expense) Total Shareholders' Equity Parent [Member] Short-term investments Short-Term Investments [Member] Equity Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Probable of recovery, legal costs Regulatory Liability, Probable of Recovery, Legal Costs Regulatory Liability, Probable of Recovery, Legal Costs WEMA WEMA [Member] WEMA Accounts payable Accounts payable Accounts Payable, Current [Abstract] Government Assistance, Liability, Decrease, Statement of Financial Position [Extensible Enumeration] Government Assistance, Liability, Decrease, Statement of Financial Position [Extensible Enumeration] Proceeds from sales and maturities of customer credit trust investments Proceeds from sales and maturities of customer credit trust investments Proceeds from Collection of Retained Interest in Securitized Receivables REGULATORY ASSETS, LIABILITIES, AND BALANCING ACCOUNTS Regulatory Assets Liabilities And Balancing Accounts [Text Block] Regulatory assets, liabilities and balancing accounts W. Craig Fugate [Member] W. Craig Fugate Former MGP sites owned by the Utility or third parties Former Manufactured Gas Plant Sites Owned By Utility Or Third Parties Former Manufactured Gas Plant Sites Owned By Utility Or Third Parties Number of lawsuits filed against company (lawsuit, complaint) Loss Contingency, Pending Claims, Number Schedule of Financial Statement Impact of Securitization Schedule of Financial Statement Impact of Securitization [Table Text Block] Schedule of Financial Statement Impact of Securitization Class of Stock [Domain] Class of Stock [Domain] Derivatives And Hedging Activities [Line Items] Derivatives And Hedging Activities [Line Items] "Disclosure of information about derivatives and hedging activities. Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost, Excluding Regulatory Account Transfers Defined Benefit Plan, Net Periodic Benefit Cost, Excluding Regulatory Account Transfers Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Accrued Wildfire Fund recoveries Loss Contingency, Wildfire Fund Recoveries Accrued Loss Contingency, Wildfire Fund Recoveries Accrued Congestion Revenue Rights Congestion revenue rights Congested Revenue Rights [Member] Congested Revenue Rights Available-for-Sale Securities Other Postretirement Investments [Member] Other Postretirement Investments Aggregate Available Trading Arrangement, Securities Aggregate Available Amount PG&E AR Facility, LLC (SPV) PG&E AR Facility, LLC [Member] PG&E AR Facility, LLC Extension period Loss Contingency, Expected Capitalization Extension Period Loss Contingency, Expected Capitalization Extension Period Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Life insurance contracts Life Settlement Contracts, Fair Value Retirement Plan Type [Domain] Retirement Plan Type [Domain] DWR loan forgiveness and performance-based disbursements DWR loan forgiveness and performance-based disbursements Noncash Loan Forgiveness, Performance-based Disbursement Earned Noncash Loan Forgiveness, Performance-based Disbursement Earned Entity Filer Category Entity Filer Category Number of shares sold (in shares) Common Stock, Share Exchange, Number of Shares Sold Common Stock, Share Exchange, Number of Shares Sold Schedule Of Changes In Equity [Table] Schedule Of Changes In Equity [Table] Schedule Of Changes In Equity [Table] Offsetting Liabilities Offsetting Liabilities [Table Text Block] Wildfire Costs Interim Rate Relief Wildfire Costs Interim Rate Relief [Member] Wildfire Costs Interim Rate Relief Accrued unbilled revenue (includes $1.7 billion and $1.3 billion related to VIEs at respective dates) Accrued unbilled revenue Accrued unbilled revenue (includes $1.7 billion and $1.3 billion related to VIEs at respective dates) Accrued Unbilled Revenue Energy Energy delivered but not yet billed at the end of the reporting period. Letter of credit sublimit Debt, Letter of Credit Sublimit Debt, Letter of Credit Sublimit Net Income Net Income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current Assets Current Assets Assets, Current [Abstract] Price risk management instruments, liabilities Liabilities Derivative Liability Government Assistance, Type [Domain] Government Assistance, Type [Domain] Number of nuclear generating units (nuclear generating unit) Number Of Nuclear Generating Units Number Of Nuclear Generating Units Entity Address, Address Line One Entity Address, Address Line One Operating lease liabilities arising from obtaining ROU assets Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Income tax provision (benefit) Income Tax Expense (Benefit) Payments Loss Contingency Accrual, Payments Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Loss contingency, expected capitalization, continuation account Loss Contingency, Expected Capitalization, Continuation Account Loss Contingency, Expected Capitalization, Continuation Account Discounted cash flow Valuation Technique, Discounted Cash Flow [Member] Statement [Table] Statement [Table] Interest income Interest income Investment Income, Interest Total environmental remediation liability Environmental Remediation Liability Utility records an environmental remediation liability when site assessments indicate that remediation is probable and the Utility can reasonably estimate the loss or a range of probable amounts. The Utility records an environmental remediation liability based on the lower end of the range of estimated probable costs, unless an amount within the range is a better estimate than any other amount Public Utility, Property, Plant and Equipment [Line Items] Public Utility, Property, Plant and Equipment [Line Items] Gross Derivative Balance, Assets Derivative Asset, Subject to Master Netting Arrangement, before Offset Financing costs Financing Costs [Member] Financing Costs Other current assets and liabilities Other current assets and liabilities Increase (Decrease) in Other Current Assets and Liabilities, Net Loss contingency, damages sought Loss Contingency, Damages Sought, Value Asset balance, beginning of period Asset balance, end of period Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs Power purchase agreements Power Purchase Agreements [Member] Third-party power purchase agreements for electricity to meet customer needs Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]