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End of Year 2035 Decrease in asset retirement obligation associated with decommissioning of millstone Increase Decrease In Asset Retirement Obligation Associated With Decommissioning Of Millstone Increase decrease in asset retirement obligation associated with decommissioning of millstone. Retirement Plan Type Retirement Plan Type [Axis] Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Net deferred gains (losses) on derivatives-hedging activities Segments Segments [Domain] Gain on sales of assets after tax Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Net Income From Continuing Operations Including Noncontrolling Interests Net Income From Continuing Operations Including Noncontrolling Interests Concentration Risk Type Concentration Risk Type [Axis] Public Utilities, General Disclosures [Abstract] Other Sales [Member] Other Sales. Other Sales Asset Retirement Obligation and Environmental Cost [Policy Text Block] Asset Retirement Obligations Over-the-counter Over-the-Counter [Member] Beginning balance Ending balance Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Balance Sheet Location Statement of Financial Position Location, Balance [Domain] Regulated and Unregulated Operating Revenue [Abstract] Amounts Associated With Dominion Pension Plan Amounts Associated With Dominion Pension Plan [Member] Amounts associated with the Dominion pension plan. Increase (Decrease) in Accounts Payable, Total Accounts payable Increase (Decrease) in Accounts Payable Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Significant noncash investing and financing activities: Due in one year or less Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Public Utilities General Disclosures [Table] Public Utilities General Disclosures [Table] Equity [Abstract] Increase (Decrease) in Derivatives Subject to Regulatory Treatment Increase Decrease In Derivatives Affecting Regulatory Assets And Liabilities The increase (decrease) (net) in instruments designated and qualifying as hedging instruments subject to regulatory treatment. Entity Current Reporting Status Entity Current Reporting Status Dividends Payable, Amount Per Share Dividends per share Facility Expected Cost, Excluding Financing Costs Facility expected cost, excluding financing costs. Facility expected cost, excluding financing costs Level 2 Fair Value, Inputs, Level 2 [Member] Total deferred credits and other liabilities Deferred Credits and Other Liabilities Total deferred credits and other liabilities Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Cash Flow Hedges Cash Flow Hedging [Member] Common stock, shares authorized Common Stock, Shares Authorized Utilities Operating Expense Maintenance and Operations Including Asset Impairment Charges and Gain (Loss) on Disposition of Assets Utilities operating expense maintenance and operations including asset impairment charges and gain (loss) on disposition of assets. Other operations and maintenance Changes in unrealized net gains (losses) on investment securities, tax OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Earnings Per Share, Basic [Abstract] EPS - Basic Public Utilities Proposed Earned Return On Equity Percentage Public Utilities Proposed Earned Return On Equity Percentage Percentage of proposed earned return Solar [Member] Solar Solar [Member] Product and Service Product and Service [Axis] Deferred cost of fuel used in electric generation Deferred Cost Of Fuel Used In Electric Generation [Member] Deferred cost of fuel used in electric generation Deferred Cost of Fuel Used in Electric Generation Fair Value by Liability Class Fair Value by Liability Class [Domain] Document Fiscal Period Focus Document Fiscal Period Focus Amount of exposure for single counterparty Concentration Risk Credit Risk Financial Instrument Maximum Exposure For Single Counterparty Concentration risk, credit risk, financial instrument, maximum exposure for single counterparty. Overrecovered Other Postretirement Benefit Costs Overrecovered Other Postretirement Benefit Costs [Member] Overrecovered other postretirement benefit costs. Interest rate percentage Interest Rate Debt Instrument, Interest Rate, Stated Percentage Revenue from Contract with Customer [Abstract] Entity Shell Company Entity Shell Company Dividend paid Common stock dividends and distributions Dividends, Common Stock, Cash Charge for the Disallowance of Certain Strategic Undergrounding Costs, Net of Tax Charge for the disallowance of certain strategic undergrounding costs, net of tax. Charge for the disallowance of certain strategic undergrounding costs, net of tax Cash and Cash Equivalents, at Carrying Value, Total Cash and cash equivalents Cash and Cash Equivalent Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Distributions from OSWP to Stonepeak Distributions from OSWP to Stonepeak Regulatory Agency Regulatory Agency [Domain] Short Duration Energy Storage [Member] Short duration energy storage. Short-duration Energy Storage Other Nonregulated Revenues Other Nonregulated Revenues [Member] Member stands for revenues from other non-regulated activities. Asset Class Asset Class [Domain] Statement [Table] Statement [Table] Energy Energy [Axis] Transmission component of Virginia Power’s. Transmission Component Of Virginia Powers [Member] Transmission Component Of Virginia Powers Interest Rate - Current Derivative Contract Interest Rate Current Derivative Contract [Member] Interest rate - current derivative contract. Disposal group including discontinued operation decrease in cash consideration. Disposal Group Including Discontinued Operation Decrease In Cash Consideration Disposal group, cash consideration Regulatory Liability Regulatory Liability [Axis] Valuation, Income Approach [Member] Discounted cash flow Valuation, Income Approach Public Utilities, Proposed Operations and Maintenance Investment Public utilities, proposed operations and maintenance investment. Proposed operations and maintenance investment Guarantor Obligations, Nature Guarantor Obligations, Nature [Domain] Schedule of Regulatory Assets and Liabilities Schedule Of Regulatory Assets And Liabilities [Table Text Block] Schedule of regulatory assets and liabilities. Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Schedule of Balance Sheet Included Balances for VPFS and OSWP Offsetting Assets [Table] Offsetting Assets [Table] Schedule Of Cash Cash Equivalents And Restricted Cash [Table] Schedule Of Cash Cash Equivalents And Restricted Cash [Table] Schedule of cash, cash equivalents and restricted cash. Statement [Line Items] Statement [Line Items] Corporate Debt Fixed Income Securities Corporate Debt Fixed Income Securities [Member] Corporate debt fixed income securities. Business Acquisition, Acquiree Business Combination [Domain] Gain (Loss) Related to Economic Hedging Activities After Tax Gain (loss) related to economic hedging activities after tax. Gain (losses) related to economic hedging activities after tax Derivative Liabilities Fair Value Current Derivative liabilities fair value current. Total current derivative liabilities First Option [Member] First option. First Option Entity Filer Category Entity Filer Category Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Variable Interest Entity Disclosure [Text Block] Variable Interest Entities Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings, Total Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings Unrealized gains (losses) included in earnings in Level 3 fair value category Natural Gas [Member] Natural Gas Twenty Twenty Five Biennial Review [Member] Twenty twenty five biennial review. 2025 Biennial Review Total liabilities and equity Liabilities and Equity Debt Instrument [Line Items] Debt Instrument [Line Items] Credit Concentration Risk Credit Concentration Risk [Member] Purchases of securities Payments to Acquire Marketable Securities Senior Notes Due In Two Thousand Thirty Six [Member] Senior notes due in two thousand thirty six. Senior Notes Due in 2036 Long-Lived Tangible Asset Long-Lived Tangible Asset [Axis] Lessor to complete construction and lease jones act compliant offshore wind installation vessel. Lessor To Complete Construction And Lease Jones Act Compliant Offshore Wind Installation Vessel [Member] Agreement with Lessor to Complete Construction and Lease Jones Act Compliant Offshore Wind Installation Vessel Fair Value, by Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Hedging Relationship Hedging Relationship [Axis] Net pension and other postretirement benefit costs (credits) Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax, Total Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax Net pension and other postretirement benefit costs (credits) Three Sixty Four Day Term Loan Facility [Member] Three sixty four day term loan facility. 364 Day Term Loan Facility Derivative [Line Items] Derivative [Line Items] Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent U.S. federal statutory tax, Percent Gain (Loss) Related To Economic Hedging Activities Gain (loss) related to economic hedging activities. Gain (losses) related to economic hedging activities Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill, Total Goodwill Goodwill Other Noncash Income (Expense), Total Other adjustments Other Noncash Income (Expense) Effective tax rate, Percent Effective Income Tax Rate Reconciliation, Percent Proceeds From Issuance Repayment Of Short Term Debt Excluding Credit Borrowing Facilities Proceeds from issuance (repayment) of short term debt excluding credit borrowing facilities. Issuance (repayment) of short-term debt, net Other revenues Other Revenues Other revenues. Allowance for Credit Losses, Total Allowance for Credit Losses, Total Decommissioning Trust Securities Allowance For Credit Losses Decommissioning trust securities allowance for credit losses. Second Option [Member] Second option. Second Option Investment Income, Interest Interest income Public Utilities, Storm Damage Increase (Decrease), Amount Public utilities, storm damage increase (decrease), amount. Increase (decrease) in net of storm damage Geographical Geographical [Domain] Public Utilities Recovery of Fuel Cost Requirement Public utilities recovery of fuel cost requirement. Recovery of fuel cost requirement Percentage of All Revenue Collected Required by Legislation Percentage of all revenue collected required by legislation. Percentage of all revenue collected required by legislation Cash, Restricted Cash and Equivalents Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Deferred Project Costs Deferred Project Costs [Member] Concentration Risks Credit Risk Number Of Counterparties Number of counterparties Concentration risk credit risk number of counterparties. Derivative liability fair value noncurrent. Derivative Liability Fair Value Noncurrent Total noncurrent derivative liabilities Equity securities Total Unrealized Losses Equity Securities, FV-NI, Unrealized Loss Schedule Of Variable Interest Entities [Table] Variable Interest Entity [Table] Cash equivalents and other, Allowance for Credit Losses Cash Equivalents And Other Allowance For Credit Losses Cash equivalents and other allowance for credit losses. Public Utilities Property Plant And Equipment Increase in Expected Cost Of Construction Public utilities, property, plant and equipment, increase in expected cost of construction. Increase in estimated project cost Affiliated receivables and payables Increase (Decrease) in Due from Affiliates, Current Number of facilities to assess the applicability of section 316(b) Loss Contingency Number Of Facilities To Assess The Applicability Of Section Loss contingency number of facilities to assess the applicability of section. Other paid-in capital Additional Paid in Capital, Common Stock Medical Coverage for Local retirees Postretirement Health Coverage [Member] Electricity Electricity [Member] Schedule Of Regulatory Liabilities [Table] Regulated Operation, Regulatory Liability [Table] Related Party Related Party [Member] Affiliates Significant Accounting Policies Significant Accounting Policies [Text Block] Property, Plant and Equipment [Line Items] Derivative Asset, Current Derivative Assets Fair Value Current Derivative assets fair value current. Total current derivative assets Regulatory assets-current Regulatory assets Regulatory Asset, Current Reconciliation of Total Cash, Restricted Cash and Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Guarantor Obligations, Nature Guarantor Obligations, Nature [Axis] Price volatility (percentage) Fair Value Assumptions Expected Volatility Rate For Commodity Contracts Fair value assumptions, expected volatility rate for commodity contracts. Production tax credits, Amount Effective Income Tax Reconciliation, Deduction Qualified Production Activities Income Tax Reconciliation Deduction Qualified Production Activities. Cash equivalents and other, Total Unrealized Gains Cash Equivalents And Other Unrealized Gains Cash equivalents and other unrealized gains. Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount Investment tax credit amortization, Amount Investment tax credit amortization, Amount Earnings Per Share Computation Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Lease commencement period Lessee Operating Lease Commencement Period Lessee operating lease commencement period. Increase (Decrease) in Other Operating Assets and Liabilities, Net, Total Other operating assets and liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Equity securities: Equity Securities [Member] Property, Plant and Equipment Property, Plant and Equipment, Net [Abstract] Purchased Excess Gas Purchased gas Costs incurred for purchased (excess) gas. Credit Risk Concentration Risk Disclosure [Text Block] Investment, Name Investment, Name [Axis] Investments Classified by Contractual Maturity Date Investments Classified by Contractual Maturity Date [Table Text Block] Net income attributable to Dominion Energy Earnings Per Share, Basic Net income attributable to Dominion Energy Repayments of Long-Term Debt, Total Repayments of Long-Term Debt Repayment and repurchase of long-term debt Repayment of long-term debt Employee Benefit Plans Retirement Benefits [Text Block] Other. Other Other [Member] Volume of derivative activity Derivative, Nonmonetary Notional Amount, Volume Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] New Corporate Office New Corporate Office [Member] New Corporate Office Member Joint Revolving Credit Facility Revolving Credit Facility [Member] Revolving Credit Facility Unrecognized Pension and Other Postretirement Benefit Costs Unrecognized Pension And Other Postretirement Benefit Costs [Member] Unrecognized pension and other postretirement benefit costs Schedule of leases. Schedule Of Leases Disclosure [Table] Schedule Of Leases Disclosure [Table] Operating Lease, Lease Income, Total Rental revenue Operating Lease, Lease Income Retirement Plan Type Retirement Plan Type [Domain] Liabilities Total current liabilities Liabilities, Current Regulatory assets-noncurrent Regulatory assets Regulatory Asset, Noncurrent Nonregulated Electric Sales Nonregulated Electricity Sales [Member] Member stands for non-regulated electric sales. Accounts receivable Increase (Decrease) in Accounts Receivable Adjustments to reconcile net income including noncontrolling interests to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Hedging Designation Hedging Designation [Domain] Long Term Debt Noncurrent Excluding Other Noncurrent Debt Long-term debt noncurrent excluding other noncurrent debt. Long-term debt Other Receivable, after Allowance for Credit Loss, Noncurrent Other Receivable, after Allowance for Credit Loss, Noncurrent, Total Amounts due from Dominion, noncurrent Underground Distribution Facilities Underground Distribution Facilities [Member] Underground distribution facilities. Additional Public Utilities Requested Rate Amount Additional public utilities requested rate amount. Additional total revenue requirement Schedule of Subsidiary Guarantees Schedule of Guarantor Obligations [Table Text Block] Construct New Culpeper Technology Transmission Lines, Substations and Related Projects in the Counties of Culpeper, Orange and Fauquier and the Town of Culpeper, Virginia [Member] Construct new culpeper technology transmission lines, substations and related projects in the counties of culpeper, orange and fauquier and the town of culpeper, virginia. Construct New Culpeper Technology Transmission Lines, Substations and Related Projects in the Counties of Culpeper, Orange and Fauquier and the Town of Culpeper, Virginia Capital expenditures Payments for (Proceeds from) Productive Assets Payments for (Proceeds from) Productive Assets, Total Basis - Natural Gas - Current Derivative Contract Basis Natural Gas Current Derivative Contract [Member] Basis - natural gas - current derivative contract. Adjustments & Eliminations Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Consolidation Items Consolidation Items [Domain] Net derivative (gains) losses-hedging activities, tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Shareholders' Equity Equity, Attributable to Parent [Abstract] Amounts Associated with the Dominion Retiree Health and Welfare Plan Amounts Associated With Dominion Retiree Health And Welfare Plan [Member] Amounts associated with the Dominion retiree health and welfare plan. Entity Small Business Entity Small Business Regulated Operations [Abstract] Schedule of Volume of Derivative Activity Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Hedging Designation Hedging Designation [Axis] Increase (Decrease) in Accrued Liabilities, Total Accrued interest, payroll and taxes Increase (Decrease) in Accrued Liabilities Commodity Commodity Contract Commodity Contract [Member] Cash equivalents and other Cash Equivalents and Other Cash Equivalents And Other Investment [Member] Cash Equivalents and Other Investment [Member] Option Model Valuation, Market Approach [Member] Retained Earnings (Accumulated Deficit), Total Retained earnings Retained Earnings (Accumulated Deficit) Letters Of Credit Issued and Outstanding Amount Letters of credit issued and outstanding amount. Letters of credit issued and outstanding Nature of Operations Nature of Operations [Text Block] Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Summary of Nuclear Decommissioning Trust Funds to Fund Future Decommissioning Costs and Nuclear Plants Preferred Stock Preferred Stock [Member] Summary of Significant Virginia Power Electric Transmission Projects Applied Significant Virginia Power Electric Transmission Projects Applied [Table Text Block] Significant Virginia power electric transmission projects applied. Percentage of remaining construction costs, including contingency Percentage Of Remaining Construction Costs, Including Contingency Percentage of remaining construction costs, including contingency. Offsetting [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Other Deferred Credits And Other Liabilities Other deferred credits and other liabilities. Other deferred credits and other liabilities Lease Contractual Term Lease Contractual Term [Axis] Leases [Abstract] Other Transmission Projects Approved [Member] Other transmission projects approved. Other Transmission Projects Approved Project Project [Domain] Weighted Average Number of Shares Outstanding, Diluted, Adjustment, Total Net effect of dilutive securities Weighted Average Number of Shares Outstanding, Diluted, Adjustment Contract with Customer, Liability, Total Contract liability balances Contract with Customer, Liability Amendment Flag Amendment Flag Taxes, Miscellaneous, Total Other taxes Taxes, Miscellaneous Valuation of certain fair value hedges associated with fixed rate debt Interest Rate Fair Value Hedge Derivative at Fair Value, Net Interest Rate Fair Value Hedge Derivative at Fair Value, Net, Total Rider GEN [Member] Rider GEN member. Rider GEN Interest and related charges (benefit). Interest and related charges (benefit) Product and Service Product and Service [Domain] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Effective tax rate income tax net benefit U.S. federal statutory tax, Amount Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-Maturity Securities [Line Items] Supplemental line of credit facility borrowings expiration period Supplemental Line Of Credit Facility Expiration Period Supplemental line of credit facility expiration period. Rider DIST [Member] Rider DIST. Rider DIST Regulatory Assets [Line Items] Regulatory Asset [Line Items] Electric fuel and other energy-related purchases Electric Fuel And Other Energy Related Purchases Electric fuel and other energy related purchases. Liabilities and Equity [Abstract] LIABILITIES AND EQUITY Entity Address, Postal Zip Code Entity Address, Postal Zip Code EPA Environmental Protection Agency [Member] Environmental protection agency. Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash provided by operating activities Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount Absence of tax on noncontrolling interest, Amount Financial Transmission Rights - Electricity- Current Derivative Contract Financial Transmission Rights Electricity Current Derivative Contract [Member] Financial transmission rights - electricity- current derivative contract. Volume of electricity Derivative, Nonmonetary Notional Amount, Energy Measure Common Stock Common Stock [Member] Repayment of Securitization Bonds Repayment of securitization bonds. Repayment of securitization bonds Regulated and Unregulated Operating Revenue Total operating revenue Hedging Relationship Hedging Relationship [Domain] Junior subordinated notes Subordinated Debt Obligations, Fair Value Disclosure Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated depreciation and amortization Accumulated depreciation and amortization Credit Facility Maturing In April Two Thousand Twenty Nine [Member] Credit facility maturing in April Two Thousand Twenty Nine. Credit Facility Maturing In April 2029 Other revenues Other Operating Income (Expense), Net Fair Value of Derivatives Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Government Securities Government Debt Securities [Member] Government debt securities. Business Combinations Discontinued Operations And Disposal Groups [Abstract] Business combinations, discontinued operations and disposal groups. Credit Facility In January 2026 Credit Facility In January Two Thousand Twenty Six [Member] Credit Facility In January 2026. DES Dominion Energy Services Inc [Member] Dominion Energy Services Inc. Schedule of Available-for-sale Securities [Line Items] Debt Securities, Available-for-Sale [Line Items] Surety Bond Surety Bond [Member] Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset Portion at Fair Value Measurement [Member] [Default] Fair Value Disclosure Item Amounts [Default] Portion at Fair Value Measurement [Member] Payment for Pension Benefits Payment for pension Contributions to qualified defined benefit pension plans Entity Address, Address Line One Entity Address, Address Line One Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV Earnings Per Share [Abstract] Financing leases Financing Leases Financing leases. Common Stock Shares Issued Not Disclosed Common stock shares issued not disclosed. Common shares issued but not disclosed Fair Value of Derivative Assets Derivative assets Derivative Asset Derivative Asset Tax receivables Tax Receivable Current Tax Receivable Current Miles of Lines Public Utilities Length Of Transmission Line Public utilities, length of transmission line. Long Duration Energy Storage [Member] Long duration energy storage. Long-duration Energy Storage Proceed from Cash Received Related to Transfer of Tax Credit Proceed from cash received related to transfer of tax credit. Proceeds from transfer of tax credits Balance Sheet Location Statement of Financial Position Location, Balance [Axis] Investment Type Investment Type [Axis] A R Os And Related Funding [Member] AROs and related funding. AROs and Related Funding Debt Securities, Available-for-Sale, Unrealized Loss Position, Total Fair value of securities in an unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position Income (loss) before income tax expense Income (loss) before income tax expense Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Income (loss) before income tax expense Income (loss) before income tax expense Net Income (Loss) Attributable to Noncontrolling Interest, Total Net Income (Loss) Attributable to Noncontrolling Interest Noncontrolling Interests Credit Facility In June Two Thousand Twenty Four [Member] Credit facility in June two thousand twenty four. Credit Facility in June 2024 Schedule Of Supplemental Cash Flow Information [Table] Schedule Of Supplemental Cash Flow Information [Table] Schedule of supplemental cash flow information. Document Type Document Type Collaborative Arrangement and Arrangement Other than Collaborative Collaborative Arrangement and Arrangement Other than Collaborative [Axis] End of Year 2045 End of Year Two Thousand Forty Five [Member] End of year two thousand forty five. Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Entity Central Index Key Entity Central Index Key Customer receivables, allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Line Of Credit Facility [Table] Line of Credit Facility [Table] Number of sites with remediation plans Number Of Sites With Remediation Plans Number of sites with remediation plans. Loss contingencies individual circumstances period Loss Contingencies Individual Circumstances Period Loss contingencies individual circumstances period. Investments, Debt and Equity Securities [Abstract] Amount of Gain (Loss) Recognized in Income on Derivatives Amount Of Gain (Loss) Recognized in Income On Derivatives Amount of gain (Loss) recognized in income on derivatives. Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments Derivative Asset, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset Valuation Approach and Technique Valuation Approach and Technique [Axis] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Increase (decrease) in cash, restricted cash and equivalents Subsequent Event Type [Domain] Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax, Total Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax Changes in net unrecognized pension and other postretirement benefit costs (credits), tax Weighted Average Initial Forward Price Weighted Average Initial Forward Price Weighted average initial forward price Virginia Grid Transformation and Security Act of 2018 Filing [Member] Virginia grid transformation and security act of 2018 filing. GTSA Filing Services provided by affiliates Operating Costs and Expenses Operating Costs and Expenses, Total Liabilities [Abstract] Liabilities Debt Securities, Available-for-Sale, Amortized Cost, Total Fixed income securities Amortized Cost, Total Debt Securities, Available-for-Sale, Amortized Cost Fixed income securities Fair Value Total Debt Securities, Available-for-Sale Corporate and Other Corporate Segment and Other Operating Segment [Member] Environmental remediation reserves Environmental Remediation Reserves Environmental remediation reserves. Deferred Charges and Other Assets Deferred Charges Regulatory Assets And Other Assets Noncurrent [Abstract] Deferred Charges, Regulatory Assets, and Other Assets, Noncurrent [Abstract] Total Shareholders' Equity Parent [Member] Shareholder's Equity Dominion Privatization [Member] Dominion privatization. February 2025 At-the-Market Program [Member] February 2025 At-the-market program. Debt Instrument Interest Rate Minimum Reset Debt instrument interest rate minimum reset. Interest rate minimum reset Debt Disclosure [Abstract] Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Eliminations Consolidation, Eliminations [Member] Increase (Decrease) in Deferred Fuel Costs, Total Increase (Decrease) in Deferred Fuel Costs Deferred fuel and purchased gas costs, net Derivative [Table] Derivative [Table] Asset Retirement Obligation Benefit Associated With Decommissioning Of Millstone Unit One Asset retirement obligation benefit associated with decommissioning of millstone unit one. Asset retirement obligation benefit associated with decommissioning of millstone unit one Rural Broadband Capacity Projects [Member] Rural Broadband Capacity Projects Member. Rural Broadband Capacity Projects Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Axis] Credit Facility Maturing In April Two Thousand Twenty Eight [Member] Credit Facility Maturing In April 2028 Credit facility maturing in April two thousand twenty eight. Estimate of Fair Value Estimate of Fair Value Measurement [Member] Proceeds from (Repayments of) Related Party Debt Issuance (repayment) of affiliated current borrowings, net Issuance (repayment) of affiliated current borrowings, net Derivative payment Derivative, Notional Amount Kilo Volt Switchyard Approval Requested for Construction Kilo volt switchyard approval requested for construction. Kilo Volt Switchyard Approval Requested for Construction Accrued Liabilities, Current, Total Accrued interest, payroll and taxes Accrued Liabilities, Current Ownership [Domain] Ownership Current Fiscal Year End Date Current Fiscal Year End Date Total realized and unrealized gains (losses): Realized And Unrealized Gains Losses [Abstract] Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Total Gains Losses Realized Unrealized [Abstract] Debt Instrument [Table] Schedule of Long-Term Debt Instruments [Table] Income Tax Reconciliation Qualified Nuclear Decommissioning Trust Net Gains (Losses) Income Tax Reconciliation Qualified Nuclear Decommissioning Trust Net Gains (Losses). Qualified nuclear decommissioning trust net gains (losses), Amount Regulatory Liability Regulatory Liability [Domain] Document Quarterly Report Document Quarterly Report Credit Facility One In July 2026 Credit Facility One In July Two Thousand Twenty Six [Member] Credit facility one in july two thousand twenty six member. Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset Regulated Gas Transportation and Storage Regulated Gas Transportation And Storage [Member] Member stands for regulated gas transportation and storage. Fair Value By Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Entity Address, State or Province Entity Address, State or Province Unfavorable Regulatory Action Unfavorable Regulatory Action [Member] Collateral derivatives with credit-related contingent provision in a liability position Collateral Already Posted, Aggregate Fair Value Facility Capacity Available Line of Credit Facility, Remaining Borrowing Capacity Annual fuel factor. Annual Fuel Factor [Member] Annual Fuel Factor Net assets related to pending purchases of securities. Net Assets Related To Pending Purchases Of Securities Net assets related to pending purchases of securities Investment, Name Investment, Name [Domain] Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax Amount Of Gain Loss Expected To Be Reclassified To Earnings During Next12 Months After Tax Accumulated change, net of tax, in accumulated gains and losses from instruments designated and qualifying as the effective portion of cash flow hedges that will be reclassified into earnings during the next 12 months. Preferred Stock, Shares Outstanding, Ending Balance Preferred Stock, Shares Outstanding, Beginning Balance Preferred stock shares outstanding Preferred Stock, Shares Outstanding Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Comprehensive income attributable to Dominion Energy Number of Existing Corridor Lines Connected to Substation Number of existing corridor lines connected to substation. Number of existing corridor lines connected to substation Common Stock, Capital Shares Reserved for Future Issuance Forward sale agreements, number of shares of common stock to be settled Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Public utilities electric generating station facilities water withdrawals. Public Utilities Electric Generating Station Facilities Water Withdrawals Electric generating station facilities water withdrawals per day Defer interest payments on the hybrids. Defer Interest Payments On Hybrids Period of deferral Risks and Uncertainties [Abstract] Geographical Geographical [Axis] Fair Value of Derivative Liabilities Derivative Liability Fair Value Derivative liability fair value. Total derivative liabilities Derivative Liabilities Revenue recognized from contract liability balances Contract with Customer, Liability, Revenue Recognized Other income (expense) Other Income (Expense) Other income (expense). Proceeds from Minority Shareholders Financing Activities Proceeds from minority shareholders financing activities. Proceeds from sale of noncontrolling interest in OSWP Accounts Receivable [Member] Customer Receivables Noncontrolling interests Equity, Attributable to Noncontrolling Interest Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance Stockholders' Equity Attributable to Noncontrolling Interest, Beginning Balance Stockholders' Equity Attributable to Noncontrolling Interest, Total Internal Credit Assessment Internal Credit Assessment [Axis] Equity securities Total Unrealized Gains Equity Securities, FV-NI, Unrealized Gain Petroleum Reserves Petroleum Reserves [Axis] Purchased (excess) capacity Purchased Excess Electric Capacity Purchased electric capacity Costs incurred in purchasing (excess) electric capacity. State and local income taxes, net of federal income tax effect, Amount Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Contributions to equity method affiliates Contributions to equity method affiliates Payments To Contributions Equity Method Investments Payments to contributions equity method investments. Contributions from Stonepeak to OSWP Other comprehensive income (loss), net of taxes: Other Comprehensive Income (Loss), Net of Tax [Abstract] Authorized return percentage Public Utilities Authorized Return On Equity Percentage Public utilities authorized return on equity percentage. Net income from continuing operations EPS from continuing operations – Basic Income (Loss) from Continuing Operations, Per Basic Share Supplemental Revolving Credit Facility [Member] Supplemental revolving credit facility. Supplemental Revolving Credit Facility Other Postretirement Benefits Other Postretirement Benefits Plan Other Postretirement Benefits Plan [Member] Proceeds from sales Proceeds from sales of securities Proceeds from Sale and Maturity of Marketable Securities Long-term debt Long-Term Debt, Fair Value Subsequent Event Subsequent Event [Member] Public Utilities Approved Rate Increase Decrease Amount Public Utilities Approved Rate Decrease Amount Public utilities approved rate increase decrease amount public utilities approved rate decrease amount. Excepted total project cost decrease Total, net of tax Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Total, net of tax Property, Plant and Equipment [Abstract] Other Other Assets, Noncurrent Other deferred charges and other assets Guarantee Agreement, Financing Obligation Guarantee agreement, financing obligation. Cove Point Dominion Cove Point L N G L P [Member] Dominion Cove Point LNG, LP. Charge associated with certain nonregulated solar generation facilities net of tax. Charge Associated With Certain Nonregulated Solar Generation Facilities Net Of Tax Charge associated with certain nonregulated solar generation facilities, net of tax Public utilities actual earned return on equity percentage. Public Utilities Actual Earned Return On Equity Percentage Percentage of earned return Electric Base Rate Case [Member] Electric base rate case. Electric Base Rate Case Fair Value, Total Nuclear decommissioning trust funds Decommissioning Fund Investments Canadys Station Canadys Station [Member] Canadys Station. Amortization period for deferred costs Regulatory Asset, Amortization Period Related Party Transaction Related Party Transaction [Axis] AOCI AOCI Attributable to Parent [Member] Accumulated other comprehensive income (loss) Derivative liabilities Derivative Liabilities Fair Value of Derivative Liabilities Derivative Liability Asset Impairment Charges After Tax Asset Impairment Charges After Tax Asset impairment charges after tax Impairment of assets and other charges after tax OSWP [Member] OSWP. OSWP Public Utilities Operating Expense Actual Fuel Expenses Under Recovered Balance Public utilities operating expense actual fuel expenses under recovered balance. Actual under-recovered balances Schedule Of Held To Maturity Securities [Table] Debt Securities, Held-to-Maturity [Table] Asset Retirement Obligation Benefit Associated With Decommissioning Of Millstone Unit One Net Of Tax Asset retirement obligation benefit associated with decommissioning of millstone unit one net of tax. Asset retirement obligation benefit associated with decommissioning of millstone unit one net of tax Preferred Stock, Value, Issued Preferred stock (see Note 15) Letter Of Credit Matures In April 2032 [Member] Letter Of Credit Matures In April 2032 [Member] Letter of Credit Matures in April 2032 Government and Other Retail Government And Other Retail [Member] Government and other retail. Interest rate non-current derivative contract. Interest Rate - Non-current Derivative Contract Interest Rate Noncurrent Derivative Contract [Member] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Domain] Rider RGGI One [Member] Rider RGGI one. Rider RGGI Increase in asset retirement obligation with corresponding increase to regulatory assets Increase Decrease In Asset Retirement Obligation With Corresponding Increase To Regulatory Assets Increase decrease in asset retirement obligation with corresponding increase to regulatory assets. Minimum [Member] Minimum Financial Instrument Financial Instrument [Axis] Gross Assets Presented in the Consolidated Balance Sheet Derivative Asset, Subject to Master Netting Arrangement, before Offset Current Assets Assets, Current [Abstract] Debt Instrument Interest Reset Period Debt Instrument Interest Reset Period Interest reset period Regulatory Assets and Liabilities Disclosure [Abstract] Private Debt Funds [Member] Private debt funds. Private Debt Funds Install underbuilt transmission lines on existing 500 kV Elmont-Ladysmith line support structures and related projects in the Counties of Hanover and Caroline, Virginia Install underbuilt transmission lines on existing 500 kV Elmont-Ladysmith line support structures and related projects in the Counties of Hanover and Caroline, Virginia [Member] Install underbuilt transmission lines on existing 500 kV Elmont-Ladysmith line support structures and related projects in the Counties of Hanover and Caroline, Virginia. Other Other Long-Term Investments Income Tax Reconciliation Reversal of Excess Deferred Income Taxes Income Tax Reconciliation Reversal of Excess Deferred Income Taxes Reversal of excess deferred income taxes, Amount Level 3 Fair Value, Inputs, Level 3 [Member] Insurance Contracts Insurance Contracts [Member] Insurance Contracts [Member] Loans Receivable Loans receivable. Loans receivable Virginia Regulation Virginia Regulation [Member] Virginia regulation. Segment Reporting [Abstract] Fixed Price - Electricity - Current Derivative Contract Fixed Price Electricity Current Derivative Contract [Member] Fixed price - electricity - current derivative contract. Total Derivative-Hedging Activities Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Leases Disclosure [Line Items] Leases Disclosure [Line Items] Leases. Current Liabilities Liabilities, Current [Abstract] Nuclear Plant Nuclear Plant [Member] Nuclear Obligations Effective Income Tax Rate Reconciliation Allowance For Reversal Of Funds Used During Construction Equity Effective income tax rate reconciliation allowance for reversal of funds used during construction equity. AFUDC - equity, Percent AFUDC - equity, Percent Schedule of Primary Operating Segments Schedule Of Primary Operating Segment Reporting Information [Table Text Block] Schedule of primary operating segment reporting information. Regulatory Asset Regulatory Asset [Axis] Derivative Asset, Subject to Master Netting Arrangement, after Offset and Deduction Net Amounts Related Party Transactions [Abstract] Beginning balance (in shares) Ending balance (in shares) Shares, Outstanding Accounts Receivable, after Allowance for Credit Loss, Current, Total Accounts Receivable, after Allowance for Credit Loss, Current Customer receivables Customer receivables (less allowance for doubtful accounts) Lease extend term Lessee, Operating Lease, Renewal Term Contributions from Stonepeak to OSWP Proceeds from Contributions from Affiliates Regulatory liabilities-current Regulatory liabilities Regulatory Liability, Current Interest Rate Interest Rate Contract Interest Rate Contract [Member] Commitments and Contingencies Commitments and Contingencies (see Note 16) Service cost Service cost Defined Benefit Plan, Service Cost Effective Income Tax Rate Reconciliation Qualified nuclear decommissioning trust net gains (losses) Effective income tax rate reconciliation qualified nuclear decommissioning trust net gains (losses). Qualified nuclear decommissioning trust net gains (losses), Percent Rider CCR Rider C C R [Member] Rider CCR. Common Stock Shares Authorized Amount But Unissued Common stock shares authorized amount but unissued. Common stock shares authorized but unissued shares Operating Lease, Liability Operating Lease, Liability, Total Operating lease liabilities Customer Rate Credits Amount Customer rate credits amount. Customer rate credits Debt Instrument, Basis Spread on Variable Rate Interest rate spread Forecast [Member] Forecast Short-Term Debt, Total Short-term debt Short-Term Debt End Of Year Two Thousand Twenty Seven [Member] End of year two thousand twenty seven. End of 2027 Common Stock, No Par Value Common stock par value Equity securities Amortized Cost Equity Securities, FV-NI, Cost Concentration Risk Benchmark Concentration Risk Benchmark [Axis] Net assets related to pending sale of securities. Net Assets Related To Pending Sale Of Securities Net assets related to pending sale of securities Energy Storage [Member] Energy Storage Energy storage. Variable Interest Entity, Primary Beneficiary [Member] VIE Income Amounts Attributable to Parent, Disclosures [Abstract] Amounts Attributable to Dominion Energy Public Utilities, Recovery Period of Costs Public utilities, recovery period of costs. Recovery period of costs Series A Junior Subordinated Notes [Member] Series A junior subordinated notes. Series A JSN Text Block [Abstract] Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax, Total Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax Changes in net unrecognized pension and other postretirement benefit costs (credits) Affiliated receivables Affiliated Receivables, Current Affiliated receivables, current. Accrued capital expenditures Capital Expenditures Incurred but Not yet Paid Net income including noncontrolling interests Net Income Including Noncontrolling Interests Net income including noncontrolling interests Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Lease Contractual Term Lease Contractual Term [Domain] Current liabilities Disposal Group, Including Discontinued Operation, Liabilities, Current, Total Current liabilities Liabilities held for sale Long-Term Debt Long-Term Debt, Excluding Current Maturities [Abstract] Securitized cost of fuel used in electric generation. Securitized Cost Of Fuel Used In Electric Generation [Member] Securitized cost of fuel used in electric generation Securitized Cost of Fuel Used in Electric Generation Borrowing Interest Charges Line of Credit Facility, Periodic Payment, Interest Long-Term Debt, Type [Domain] Loss Contingencies [Table] Loss Contingencies [Table] Weighted Average Number of Shares Outstanding, Basic, Total Average shares of common stock outstanding – Basic Weighted Average Number of Shares Outstanding, Basic Proposed cost of project Public Utilities Property Plant And Equipment Requested Cost Of Construction Public utilities property plant and equipment requested cost of construction. Market Price Fair Value Inputs Offered Quotes For Commodity Contracts Fair value inputs, offered quotes for commodity contracts. Scenario [Axis] Approximate tariffs cost on equipment expected to be delivered Tariffs Cost on Equipment Expected to Be Delivered Subject to Court Ruling Tariffs cost on equipment expected to be delivered subject to court ruling. Document Information [Line Items] Document Information [Line Items] Regulatory Asset Total regulatory assets NextEra Energy Merger Agreement [Member] NextEra Energy Merger Agreement NextEra energy merger agreement. Other Stockholders' Equity, Other Other Effective Income Tax Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Net income from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent, Total Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Net income attributable to Dominion Energy from continuing operations Segments Segments [Axis] Forward sale agreement. Forward Sale Agreement [Member] Forward Sale Agreements Long-Lived Tangible Asset Long-Lived Tangible Asset [Domain] Related-Party Transactions Related Party Transactions Disclosure [Text Block] Derivative liabilities, not subject to a master netting or similar arrangement Derivative Liability, Not Subject to Master Netting Arrangement Shareholders' equity Equity, Attributable to Parent Shareholders' equity Beginning balance, net of tax Ending balance, net of tax Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year Expected contributions to qualified defined benefit pension plans for remainder of fiscal year Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance Derivatives Not Designated as Hedging Instruments [Table Text Block] Net realized (gains) losses on investment securities, tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Lessee, operating Lease, existence of option to extend Lessee, Operating Lease, Existence of Option to Extend [true false] Statement of Stockholders' Equity [Abstract] Series C Preferred Stock Series C Preferred Stock [Member] Payable to affiliates Affiliated current borrowings Affiliated current borrowings Affiliated current borrowings Investment in equity method affiliates Equity Method Investments Investment in equity method investees Public utilities number of solar generation projects Public Utilities Number Of Solar Generation Projects Public utilities number of solar generation projects. Waste Management and Remediation Waste Management And Remediation [Member] Waste Management and Remediation. Valuation Approach and Technique Valuation Approach and Technique [Domain] Realized gains Debt And Equity Securities Realized Gains Debt and equity securities realized gains. Electric Fuel and Other Energy-Related Purchases Electric Fuel And Other Energy Related Purchases [Member] Electric Fuel and Other Energy Related Purchases Estimates Use of Estimates, Policy [Policy Text Block] Schedule Of Equity Method Investments [Table] Equity Method Investment [Table] Internal Credit Assessment Internal Credit Assessment [Domain] Regulated Gas Sales Regulated Gas Sales [Member] Member stands for Regulated gas sales. Construct Aspen-Doubs and Goose Creek-Woodside Transmission Lines Rebuild Doubs-Goose Creek Transmission Line and Related Projects In County of Loudoun Virginia [Member] Construct Aspen-Doubs and Goose Creek-Woodside transmission lines, rebuild Doubs-Goose Creek transmission line and related projects in the County of Loudoun, Virginia Construct Aspen-Doubs and Goose Creek-Woodside transmission lines, rebuild Doubs-Goose Creek transmission line and related projects in County of Loudoun, Virginia Carbon Regulations Carbon Regulations [Member] Carbon regulations. Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Virginia Electric and Power Company Virginia Electric And Power Company [Member] Virginia Electric and Power Company. Impairment of assets and other charges (benefits). Impairment Of Assets And Other Charges Benefits Impairment of assets and other charges (benefits) Fair Value Measurements Fair Value Disclosures [Text Block] Utility Scale Solar And Energy Storage [Member] Utility scale solar and energy storage. Utility Scale Solar and Energy Storage Public Utilities, Regulatory Proceeding Public Utilities, Regulatory Proceeding [Domain] Junior Subordinated Debt [Member] Junior Subordinated Debt Construct new Allman Station switching station and related projects in the City of Fredericksburg, Virginia [Member] Construct new Allman Station switching station and related projects in the City of Fredericksburg, Virginia [Member] Construct new Allman Station switching station and related projects in the City of Fredericksburg, Virginia UNITED STATES U.S. Pension and Other Postretirement Benefit Costs Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Project Project [Axis] Noncontrolling Interests Noncontrolling Interest [Member] Debt Instrument, Name Debt Instrument, Name [Domain] Regulatory Asset Regulatory Asset [Domain] Net Amounts Derivative Liability, Subject to Master Netting Arrangement, after Offset and Deduction Sale of Noncontrolling Interest Equity Sale of noncontrolling interest equity. Sale of noncontrolling interest in OSWP Guarantee Obligations [Line Items] Guarantor Obligations [Line Items] Other Other Assets, Current Other current assets Application Date Application date Application Date Of Public Utilities Transmission Application date of public utilities transmission. Accumulated Deferred Investment Tax Credit Deferred investment tax credits Earnings (loss) from equity method investees Earnings from equity method investees Earnings from equity method investees Equity in earnings (losses) of equity method investees Derivative Instruments and Hedging Activities Disclosure [Abstract] Public Utilities Proposes to Number of Additional feeders Requested Approval Public utilities proposes to number of additional feeders requested approval. Number of additional feeders request approval Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share, Total EPS from discontinued operations – Basic Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Net income (loss) from discontinued operations Other income (expense) Segment Reporting, Other Segment Item, Amount Included in earnings Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings Lessor Lessor [Member] Lessor [Member] Total regulatory liabilities Regulatory Liability Credit Facility One In September Two Thousand Twenty Five [Member] Credit facility one in September Two Thousand Twenty Five. Credit Facility One in September 2025 Contracted Energy Contracted Energy [Member] Contracted Energy. Construct Firehouse Transmission Lines Substation and Related Projects In County of Loudoun, Virginia [Member] Construct Firehouse transmission lines, substation and related projects in the County of Loudoun, Virginia. Construct Firehouse transmission lines, substation and related projects in County of Loudoun, Virginia DESC Dominion Energy South Carolina Inc Dominion Energy South Carolina Inc [Member] Dominion Energy South Carolina, Inc. Construct Morrisville-Wishing Star transmission lines and related projects in the Counties of Fauquier, Prince William and Loudoun, Virginia Construct Morrisville-Wishing Star transmission lines and related projects in the Counties of Fauquier, Prince William and Loudoun, Virginia [Member] Construct Morrisville-Wishing Star transmission lines and related projects in the Counties of Fauquier, Prince William and Loudoun, Virginia Public Utilities Requested Rate Increase Annual Revenue Of Pending Applications Approval Public utilities requested rate increase annual revenue of pending applications approval. Public utilities requested rate increase annual revenue of pending applications approval Included in regulatory assets/liabilities Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Regulatory Assets And Liabilities Fair value, net derivative asset (liability) measured on recurring basis, unobservable inputs reconciliation, gain (loss) included in regulatory assets and liabilities. 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] Entity Entity [Domain] Due after ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Credit Facility Credit Facility [Axis] Equity Method Investment, Ownership Percentage Ownership percentage Acquisition of solar development projects Project Cost Payments to Acquire Projects Effective Income Tax Rate Reconciliation Reversal Of Excess Deferred Income Taxes Effective income tax rate reconciliation reversal of excess deferred income taxes. Reversal of excess deferred income taxes, Percent Interest Rate Hedges [Member] Interest rate hedges. Interest Rate Hedges Schedule of Changes in AOCI Net of Tax and Reclassifications out of AOCI by Component Changes In Accumulated Other Comprehensive Income And Reclassification Out Of Accumulated Other Comprehensive Income [Table Text Block] Changes in accumulated other comprehensive income and reclassification out of accumulated other comprehensive income. Other Deferred Rider Costs for Virginia Electric Utility Other Deferred Rider Costs for Virginia Electric Utility [Member] Other Deferred Rider Costs for Virginia Electric Utility [Member] Schedule of Line of Credit Facilities Schedule of Line of Credit Facilities [Table Text Block] Former Gas Plant Site With Post Closure Groundwater Monitoring Program Former Gas Plant Site With Post Closure Groundwater Monitoring Program [Member] Former gas plant site with post closure groundwater monitoring program. Production tax credit Effective Income Tax Rate Reconciliation, Production Tax Credit, Amount Effective income tax rate reconciliation, production tax credit, amount. SCANA S C A N A [Member] SCANA. Public Utilities Property Plant And Equipment Expected Cost Of Construction Contingency Public utilities property plant and equipment expected cost of construction contingency. Anticipated project cost contingency Environmental Remediation Contingency Environmental Remediation Contingency [Axis] Related Party Related and Nonrelated Parties [Axis] Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Other, net, Amount Pension Benefits Pension Plan [Member] Beginning balance Ending balance AOCI before Tax, Attributable to Parent Regulatory assets expected collection period commencing year. Regulatory Assets Expected Collection Period Commencing Year Regulatory assets expected collection period commencing year Foreign currency exchange rate Foreign Exchange Contract [Member] Foreign Currency Exchange Rate Contract Entity Address, City or Town Entity Address, City or Town Repurchase of preferred stock, Shares Repurchase of preferred stock, Shares Stock repurchased, shares Stock Repurchased During Period, Shares Repurchase of preferred stock (in shares) Regulatory Assets and Liabilities Schedule of Regulatory Assets and Liabilities [Text Block] Number of reportable segment Number of Reportable Segments Security Exchange Name Security Exchange Name Credit Facility Credit Facility [Domain] Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Cash Cash Equivalents And Restricted Cash [Line Items] Cash Cash Equivalents And Restricted Cash [Line Items] Cash, cash equivalents and restricted cash. Kilo Volt Line 1 Kilo Volt Line. Type of Line Regulatory Agency Regulatory Agency [Axis] Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Other, net, Percent Property, Plant and Equipment, Gross, Ending Balance Property, Plant and Equipment, Gross, Beginning Balance Property, Plant and Equipment, Gross, Total Property, plant and equipment Property, Plant and Equipment, Gross Issuance of bonds number of years of tenors Issuance of Bonds Number of Years of Tenors Issuance of bonds number of years of tenors. Commodity Transactions Commodity [Member] Guarantee obligations cumulative maximum exposure. Guarantee Obligations Cumulative Maximum Exposure Guarantee obligations cumulative maximum exposure Intersegment revenue Intersegment Eliminations [Member] Regulated Electric Sales Electricity, US Regulated [Member] Counterparty Name Counterparty Name [Axis] Income from continuing operations including noncontrolling interests before income tax expense Income loss from continuing operations before income taxes extraordinary items noncontrolling interest Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income from continuing operations including noncontrolling interests before income tax expense Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Net income (loss) attributable to Dominion Energy Net income (loss) from discontinued operations Net income (loss) attributable to Dominion Energy from discontinued operations - Basic & Diluted Concentration Risk Type Concentration Risk Type [Domain] Deferred Nuclear Refueling Outage Costs [Member] Deferred nuclear refueling outage costs. Deferred Nuclear Refueling Outage Costs Final Rule to Revise Effluent Limitations Guidelines for Steam Electric Power Generating Category Final Rule To Revise Effluent Limitations Guidelines For Steam Electric Power Generating Category [Member] Final rule to revise effluent limitations guidelines for steam electric power generating category. Asset Retirement Obligation Costs [Member] Provision for Future Cost of Removal and AROs Charge (Benefit) for Costs Not Expected to Be Recovered Including Noncontrolling Portion Charge (benefit) for costs not expected to be recovered including noncontrolling portion. Charge (benefit) for costs not expected to be recovered including noncontrolling portion Termination fee payable Termination Fee Payable Termination fee payable. Payables to affiliates Payables to Affiliates, Current Payables to affiliates, current. Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Measurement Input Type Measurement Input Type [Domain] Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share, Total EPS from discontinued operations – Diluted Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Net income (loss) from discontinued operations Inventory, Net, Total Inventories Inventory, Net Public Utilities Property Plant And Equipment Aggregate Cost Of Construction Public utilities property plant and equipment aggregate cost of construction. Non-jurisdictional generation facilities aggregate recorded cost Cash, restricted cash and equivalents shown in the Consolidated Statements of Cash Flows Cash, restricted cash and equivalents at beginning of period Cash, restricted cash and equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Measurement Basis Measurement Basis [Axis] Statistical Measurement Statistical Measurement [Domain] Restricted Cash and Investments, Current, Total Restricted cash and equivalents Restricted Cash and Investments, Current Interest And Related Charges Interest And Related Charges [Member] Interest and related charges. Securitization bonds fair value disclosure. Securitization Bonds Fair Value Disclosure Securitization bonds Assets, Current Total current assets Assets Document Period End Date Document Period End Date Government Debt Fixed Income Securities Government Debt Fixed Income Securities [Member] Government debt fixed income securities. Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Credit Spread (percentage) Fair Value Assumptions Expected Credit Spread For Commodity Contracts Fair Value Assumptions Expected Credit Spread For Commodity Contracts Statement of Financial Position [Abstract] Loss Contingency Nature Loss Contingency Nature [Axis] Public utilities number Of power purchase agreements. Public utilities number of power purchase agreements Public Utilities Number Of Power Purchase Agreements Public Utilities, Regulatory Proceeding Public Utilities, Regulatory Proceeding [Axis] Fair Value Option Quantitative Disclosures [Table] Fair Value Option, Disclosures [Table] Loss Contingency, Nature Loss Contingency, Nature [Domain] High Load High Load[Member] High Load. The amount of operating expenses, attributable to affiliated suppliers, for the period that are associated with the company's normal revenue producing operations. Affiliated Suppliers Affiliated suppliers Environmental Remediation Site Environmental Remediation Site [Axis] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Amounts reclassified from AOCI Class of Stock Class of Stock [Axis] Public Utilities Electric Generating Station Facilities Heightened Entrainment Analysis Public utilities electric generating station facilities heightened entrainment analysis. Electric generating station facilities heightened entrainment analysis per day Deferred Credits and Other Liabilities Other Liabilities, Noncurrent [Abstract] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Long-term debt Long Term Debt Other Than Junior Subordinated Notes Long term debt other than junior subordinated notes. Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax, Total Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax Net pension and other postretirement benefit costs (credits), tax Net pension and other postretirement benefit costs (credits), tax Maximum Term Maximum Length of Time Hedged in Cash Flow Hedge Cash equivalents and other, Total Unrealized Losses Cash Equivalents And Other Unrealized Loss Cash equivalents and other unrealized loss. Derivative assets, not subject to a master netting or similar arrangement Derivative Asset, Not Subject to Master Netting Arrangement Derivatives Not Designated as Hedging Instruments Fair Value - Derivatives not under Hedge Accounting Not Designated as Hedging Instrument [Member] Nonregulated Renewable Natural Gas Facilities [Member] Nonregulated renewable natural gas facilities. Nonregulated Renewable Natural Gas Facilities Rider SNA. Rider S N A [Member] Rider SNA Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Total liabilities Liabilities Total liabilities Energy Energy [Domain] Financial Instruments Financial Instruments [Domain] Asset Retirement Obligations, Noncurrent Asset Retirement Obligations, Noncurrent, Total Asset retirement obligations - noncurrent Regulatory assets, amounts expected collection period. Regulatory Assets Amounts Expected Collection Period Regulatory assets amounts expected collection period Derivatives Derivative Liabilities [Member] Derivative liabilities. Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Derivative Instruments Gain Loss [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Number of facilities that are subject to final regulations Loss Contingency Number Of Facilities That May Be Subject To Final Regulations Loss contingency number of facilities that may be subject to final regulations. Disposal Groups, Including Discontinued Operations [Table] Other Other Regulatory Assets (Liabilities) [Member] Rebuild Charlottesville-Gordonsville transmission lines and related projects in the County of Albermarle and the City of Charlottesville, Virginia Rebuild Charlottesville-Gordonsville transmission lines and related projects in the County of Albermarle and the City of Charlottesville, Virginia [Member] Rebuild Charlottesville-Gordonsville transmission lines and related projects in the County of Albermarle and the City of Charlottesville, Virginia. Investment Grade Internal And External Credit Rating Investment Grade [Member] Internal and external credit rating, investment grade. Average shares of common stock outstanding – Diluted Weighted Average Number of Shares Outstanding, Diluted Entity File Number Securities Act File Number Payments of Ordinary Dividends, Common Stock Common dividend payments Changes in unrealized net gains (losses) on investment securities OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Cover [Abstract] Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Measurement Input Type Measurement Input Type [Axis] Schedule of Carrying Values and Estimated Fair Values of Debt Instruments Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Environmental Remediation Contingency Environmental Remediation Contingency [Domain] Nuclear decommissioning trust Environmental Restoration Costs [Member] Nuclear Decommissioning Trust Investments [Domain] Investments Offsetting Assets [Line Items] Offsetting Assets [Line Items] Reclassification from AOCI, Current Period, Tax, Total Income tax expense (benefit) Income tax expense (benefit) Reclassification from AOCI, Current Period, Tax Derivative, Gain (Loss) on Derivative, Net Derivative, Gain (Loss) on Derivative, Net, Total Amount of Gain (Loss) Recognized in AOCI on Derivatives Securitization Option [Member] Securitization option. Securitization Option Other Other Long-Term Debt, Noncurrent Derivative, Net Liability Position, Aggregate Fair Value Aggregate fair value of all derivative instruments with credit contingent provisions that are in a liability position Income before income tax expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income before income tax expense Revenue Benchmark [Member] Total Operating Revenue Scenario [Domain] Plant construction and other property additions (including nuclear fuel) Payments To Acquire Property Plant And Equipment Including Nuclear Fuel Payments to acquire property plant and equipment including nuclear fuel. Public Utilities General Disclosures [Line Items] Public Utilities General Disclosures [Line Items] Public Utilities, General Disclosures [Line Items] Number of operating segment Number of Operating Segments Cash equivalents and other, Fair Value Cash equivalents and other, Fair Value Cash Equivalents And Other Fair Value Adjustments Cash equivalents and other fair value adjustments. Sale of Stock [Domain] Operating Segments Segment Reporting Disclosure [Text Block] Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Amount of tax AOCI Tax, Attributable to Parent Beginning balance, tax Ending balance, tax CCR Remediation, Ash Pond and Landfill Closure Cost CCR Remediation, Ash Pond and Landfill Closure Cost [Member] CCR remediation, ash pond and landfill closure cost. New project on stepdown conversion pilot program Public Utilities New Project On Stepdown Conversion Pilot Program Public utilities new project on stepdown conversion pilot program. Monetization of guarantee settlement Monetization Of Guarantee Settlement [Member] Monetization of guarantee settlement. Monetization of Guarantee Settlement Transition services agreements Transition services agreements. Transition Services Agreements [Member] Number of overhead stepdown transformers Public Utilities Number Of Overhead Stepdown Transformers Public utilities number of overhead stepdown transformers. Purchases of nuclear fuel Payments for Nuclear Fuel Debt maturity year Debt instrument maturity year. Debt Instrument Maturity Year Debt instrument maturity year Riders OSW and CE [Member] Riders OSW and CE. Riders OSW and CE Public Utilities Number Of Energy Storage Project Public utilities number of energy storage project. Public utilities number of energy storage project Purchased gas. Purchased Gas [Member] Purchased Gas Effective income tax rate reconciliation remeasurements and settlements of uncertain tax positions. Remeasurements and settlements of uncertain tax positions Effective Income Tax Rate Reconciliation Remeasurements And Settlements Of Uncertain Tax Positions Remeasurements and settlements of uncertain tax positions, Percent Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Ownership Ownership [Axis] Increase Decrease in Depreciation Expense Increase (decrease) in depreciation expense. Increase (decrease) in depreciation expense Benefit Related to the Revision of AROs for Millstone Unit 1 Benefit related to the revision of aros for millstone unit 1. Benefit related to the revision of aros for millstone unit 1 Rider GEN one [Member] Rider GEN one. Rider GEN One Depreciation expense Depreciation, Total Depreciation expense Depreciation Carrying Amount Reported Value Measurement [Member] Issuance and remarketing of long-term debt Proceeds from Issuance of Long-Term Debt, Total Proceeds from Issuance of Long-Term Debt Issuance of long-term debt Investment, Type [Extensible Enumeration] Shared Services Purchased Shared Services Purchased Shared Services Purchased Modifications OF Operating Leases Modifications of operating leases. Modifications of operating leases Other Receivables, Net, Current, Total Other Receivables, Net, Current Other receivables (less allowance for doubtful accounts) Other receivables Lessee, Operating Lease, Term of Contract Lease commenced term Lease Agreement Maturity Period Lease agreement maturity period. Lease agreement maturity period Total investments Long-Term Investments Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Common stock, shares outstanding Common Stock, Shares, Outstanding Amortization of prior service cost (credit) Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Document Transition Report Document Transition Report Securitization bonds. Securitization Bonds Securitization bonds Letter of credit as collateral posted for derivatives in liability position fair value. Letter Of Credit As Collateral Posted For Derivatives In Liability Position Fair Value Letter of credit as collateral posted for derivatives in liability position Derivative Instrument Detail [Abstract] Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Percent Investment tax credit amortization, Percent Depreciation Depletion And Amortization Including Nuclear Fuel Depreciation Depletion and Amortization Including Nuclear Fuel Depreciation and amortization (including nuclear fuel) Impairment of assets and other charges Asset Impairment Charges, Total Asset Impairment Charges Charge for the write-off of certain previously deferred amounts Basis - Natural Gas - Non-current Derivative Contract Basis Natural Gas Noncurrent Derivative Contract [Member] Basis - natural gas - non-current derivative contract. South Carolina Regulation South Carolina Regulation [Member] South Carolina Regulation. Cash To Be Received Under Agreement In Exchange Of Shares Cash to be received under agreement in exchange of shares. Cash to be received under agreements in exchange of shares Public utilities operating expense estimated fuel expenses under recovered balance. Public Utilities Operating Expense Estimated Fuel Expenses Under Recovered Balance Estimated under-recovered balances Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income including noncontrolling interests Comprehensive income including noncontrolling interests Statement of Cash Flows [Abstract] Loss associated with severe weather events Loss Associated With Severe Weather Events Loss associated with severe weather events. Issuance of stock Issuance of common stock Issuance of stock to Dominion Energy Fixed Price - Electricity - Non-current Derivative Contract Fixed Price Electricity Noncurrent Derivative Contract [Member] Fixed price - electricity - non-current derivative contract. Share of Costs Not Expected to Be Recovered from Customers on The CVOW Commercial Project Share of costs not expected to be recovered from customers on the cvow commercial project. Share of costs not expected to be recovered from customers on the CVOW commercial project Type of line Type of Line Kilo Volt Line One Kilo Volt Line One Accumulated Other Comprehensive Income (Loss) Equity [Text Block] Earnings Per Share Earnings Per Share [Text Block] Period for which expenditures are expected to be recovered Remaining Recovery Period of Regulatory Assets for which No Return on Investment During Recovery Period is Provided Discontinued Operations and Disposal Groups [Abstract] Leases Lease [Text Block] Lease. Net income (loss) attributable to Dominion Energy Net Income Increase (Decrease) in Inventories, Total Inventories Increase (Decrease) in Inventories Liabilities held for sale Liabilities held for sale. Credit exposure Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure Offsetting Liabilities Offsetting Liabilities [Table Text Block] Payments of Distributions to Affiliates Distributions from OSWP to Stonepeak Equity Securities, FV-NI, Unrealized Gain (Loss), Total Unrealized gains (losses) recognized during the period on securities still held at period end Equity Securities, FV-NI, Unrealized Gain (Loss) Other Proceeds from (Payment for) Other Financing Activity Number of separate petitions for reconsideration granted Loss Contingency Number Of Separate Petitions For Reconsideration Granted Loss contingency number of separate petitions for reconsideration granted. Various Programs [Member] Various Programs [Member] Various Programs Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Regulatory Matters Public Utilities Disclosure [Text Block] Derivatives Fair Value [Line Items] Derivatives, Fair Value [Line Items] Nonoperating Income Expense For Specific Items Nonoperating income (expense) for specific items. After- tax net income (expenses) for specific items After- tax net benefits (expenses) for specific items Credit Facility Two In July Two Thousand Twenty Six [Member] Credit facility two in july two thousand twenty six. Credit Facility Two In July 2026 Preferred Stock, Dividend Rate, Per-Dollar-Amount Preferred stock dividend per share ASSETS Assets [Abstract] Assets Dividends, Preferred Stock, Stock Dividend stock Preferred stock dividends (see Note 15) Other Deferred Charges and Other Assets of Right-of-use Asset Other deferred charges and other assets of right-of-use asset. Other deferred charges and other assets of right-of-use asset Exchange Exchange Traded [Member] Document Fiscal Year Focus Document Fiscal Year Focus Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Retirement Benefits [Abstract] Other deferred credits and other liabilities. Other Deferred Credits And Other Liabilities [Member] Other Deferred Credits and Other Liabilities Accounts Payable, Current, Total Accounts payable Accounts Payable, Current Kilo volt ampere Kilo volt ampere. Schedule of Operating Revenue Operating Revenue [Table Text Block] This element contains information about the components of the entity's operating revenue. Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Schedule of Net Benefit Costs [Table Text Block] Components of Provision for Net Periodic Benefit (Credit) Cost NND Project Costs N N D Project Costs [Member] NND project costs. Net gains (losses) recognized during the period Equity Securities, FV-NI, Gain (Loss) Transaction Type Transaction Type [Axis] Atlantic Coast Pipeline Atlantic Coast Pipeline L L C [Member] Atlantic coast pipeline LLC. Lessee operating lease extended maturity period Lessee Operating Lease Extended Maturity Period Lessee operating lease extended maturity period. Unrealized Gain Loss on Equity Unrealized Gain (Loss) on Investments [Table Text Block] AOCI After-Tax AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax Revenue from External Customers Total revenue from external customers Revenue from external customers. Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Increase (decrease) in revenue requirement Public Utilities, Approved Rate Increase (Decrease), Amount Decrease in expected total project cost Junior subordinated notes Junior Subordinated Notes, Noncurrent Fair Value Disclosures [Abstract] Commitments and Contingencies Disclosure [Abstract] Offsetting Assets Offsetting Assets [Table Text Block] Series B Junior Subordinated Notes [Member] Series B junior subordinated notes. Series B JSN Repayments of borrowings Repayments of Long-Term Lines of Credit Base rate increase effective January 2027 Public Utilities Base Rate Increase (Decrease) Effective January Two Thousand Twenty Seven Public utilities base rate increase (decrease) effective January 2027. Net income attributable to Dominion Energy from continuing operations - Basic Net Income (Loss) Available to Common Stockholders, Basic Regulatory assets not expect to earn return Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided Operating leases. Operating Leases Operating leases Long-Term Line of Credit Long-Term Line of Credit, Total Borrowings outstanding Credit facility, amount borrowed Revenues From Customers With Customers [Table] Revenues From Customers With Customers [Table] Revenues from customers with customers. Significant Accounting Policies [Table] Significant Accounting Policies [Table] Significant Accounting Policies [Table] Debt Instrument Debt Instrument [Axis] EPA and State Regulatory Agencies Environmental Protection Agency And State Regulatory Agencies [Member] Environmental protection agency and state regulatory agencies. Investment Grade Counterparty Investment Grade Counterparty [Member] Investment grade counterparty. Derivative Instrument Derivative Instrument [Axis] Percentage Of Undivided Interest Owned In The Plant And Electrical Output Percentage of undivided interest owned in the plant and electrical output. Percentage of undivided interest owned in the plant and electrical output Assets Derivative Financial Instruments, Assets [Member] Revenues From Contract With Customer [Line Items] Revenues From Contract With Customer [Line Items] Revenues from contract with customer. Interest cost Defined Benefit Plan, Interest Cost Total assets Total assets Assets, Fair Value Disclosure Sale of Stock Sale of Stock [Axis] Concentration risk, percentage (percentage) Concentration Risk, Percentage Long-Term Debt and Lease Obligation, Current, Total Securities due within one year Long-Term Debt and Lease Obligation, Current Charge for The Disallowance of Certain Strategic Undergrounding Costs Charge for the disallowance of certain strategic undergrounding costs. Charge for the disallowance of certain strategic undergrounding costs Services provided to affiliates Revenues Operating Revenue Total Operating Revenue Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Net cash used in investing activities Title of 12(b) Security Title of 12(b) Security Schedule Of Segment Reporting Information By Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Partial Rebuild Chesterfield-lanexa Transmission Lines In The Counties Of Henrico, Charles City And New Kent, Virginia [Member] Partial Rebuild Chesterfield-lanexa Transmission Lines In The Counties Of Henrico, Charles City And New Kent, Virginia Member. Partial rebuild Chesterfield-Lanexa transmission lines in the Counties of Henrico, Charles City and New Kent, Virginia Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Percent Absence of tax on noncontrolling interest, Percent Absence of tax on noncontrolling interest, Percent Derivatives and Hedge Accounting Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Total Unrealized Gains Decommissioning Trust Securities Unrealized Gains Decommissioning trust securities unrealized gains. Other receivables. Other Receivables [Member] Other Receivables Related Party Related and Nonrelated Parties [Domain] Valley Link Transmission Company, LLC [Member] Valley Link Transmission Company, LLC. Income Taxes Income Tax Disclosure [Text Block] Debt Securities, Available-for-Sale, Allowance for Credit Loss, Ending Balance Debt Securities, Available-for-Sale, Allowance for Credit Loss, Beginning Balance Debt Securities, Available-for-Sale, Allowance for Credit Loss, Total Fixed income securities Allowance for Credit Losses Debt Securities, Available-for-Sale, Allowance for Credit Loss 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] Significant Riders Associated With Virginia Power Projects Significant Riders Associated With Virginia Power Projects [Table Text Block] Significant riders associated with VIRGINIA power projects. Long lived asset held for sale Long lived asset held for sale. Cash equivalents and other, Amortized Cost Cash Equivalents And Other Carrying Value Adjustments Cash equivalents and other carrying value adjustments. Fair Value, Option, Qualitative Disclosures Fair Value Measured On Recurring Basis Changes In Significant Unobservable Input [Table Text Block] Fair value measured on recurring basis changes in significant unobservable input. Total deferred charges and other assets Deferred Charges Regulatory Assets And Other Assets Noncurrent Deferred charges, regulatory assets, and other assets, noncurrent. Termination fee receivable Termination Fee Receivable Termination fee receivable. Document Information [Table] Document Information [Table] Other Liabilities, Noncurrent Other deferred credits and other liabilities Other Fixed Income Fixed Income Investments [Member] FTRs Financial Transmission Rights [Member] Financial Transmission Rights Consolidated Entities Consolidated Entities [Axis] Foreign Currency Exchange Rate Foreign Exchange [Member] Concentration Risk and Guarantor Obligations [Line Items] Concentration Risk And Guarantor Obligations [Line Items] Concentration Risk and Guarantor Obligations [Line Items] Legal Entity Legal Entity [Axis] Due after one year through five years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Changes in: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Outstanding Letters of Credit Letters of Credit Outstanding, Amount Other Regulated Revenues [Member] Member stands for revenues from other regulated activities. Other Regulated Revenue Business Acquisition And Dispositions [Table] Business Acquisition And Dispositions [Table] Business acquisition and dispositions. Income Tax Disclosure [Abstract] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Other Paid-In Capital Additional Paid-in Capital [Member] Non-Fuel, Base Rate Non-Fuel, Base Rate [Member] non-fuel, base rate. Commercial Commercial Commercial [Member] Commercial. Dominion Energy South Carolina [Member] Dominion Energy South Carolina DESC Dominion energy south Carolina. Measurement Frequency Measurement Frequency [Domain] Hydroelectric Facilities Hydroelectric Facilities [Member] Hydroelectric facilities. Stock repurchase program, authorized amount Share Repurchase Program, Authorized, Amount Income Statement Location Statement of Income Location, Balance [Axis] Trading Symbol Trading Symbol Forward sale agreement expected to be settled in fourth quarter of 2027. Forward Sale Agreement Expected to be Settled in Fourth Quarter of 2027 Forward Sale Agreement Expected to be Settled in Fourth Quarter of 2027 Property, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Schedule Of Related Party Transactions By Related Party [Table] Related Party Transaction [Table] Equity securities Fair Value Equity Securities, FV-NI, Current Nonregulated Solar Generation Facilities [Member] Nonregulated solar generation facilities. Nonregulated Solar Generation Facilities Electric D S M programs. Electric D S M Programs [Member] Electric DSM Programs Subsequent Event Type [Axis] Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Net deferred gains (losses) on derivatives-hedging activities, tax Public Utilities, Proposed Capital Investment Public utilities, proposed capital investment. Proposed capital investment Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Commodity purchases from affiliates Related Party Transaction, Purchases from Related Party Effective Income Tax Computation [Line Items] Effective Income Tax Computation [Line Items] Effective income tax computation. Fair Value, Measurements, Recurring Fair Value, Recurring [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Schedule Of Supplemental Cash Flow Information [Line Items] Schedule Of Supplemental Cash Flow Information [Line Items] Schedule of supplemental cash flow information. Public Utilities Base Rate Increase (Decrease) Effective January Two Thousand Twenty Six Public utilities base rate increase (decrease) effective January 2026. Base rate increase effective January 2026 Reserve for refunds and rate credits to electric utility customers Revenue Subject to Refund [Member] Reserve for Rate Credits to Electric Utility Customers Interest expense Interest and related charges (benefit) Interest and Debt Expense, Total Interest and related charges Interest and Debt Expense Equity Components Equity Components [Axis] Electric service customers over period Electric Service Customers Over Period Electric service customers over period. Cost Of Fuel [Member] Cost of fuel. Cost of Fuel Assets Held-in-trust, Total Rabbi trust securities Asset, Held-in-Trust Approval Date Approval Date Of Public Utilities Transmission Approval date of public utilities transmission. Line of Credit, Current Supplemental credit facility borrowings Nonoperating Income (Expense), Total After- tax net benefits (expenses) Nonoperating Income (Expense) After- tax net income (expenses) Equity Component Equity Component [Domain] Asset Class Asset Class [Axis] Income Tax Reconciliation Allowance for Reversal of Funds Used During Construction Equity Income Tax Reconciliation Allowance for Reversal of Funds Used During Construction Equity AFUDC - equity, Amount Derivative assets fair value noncurrent. Derivative Assets Fair Value Noncurrent Total noncurrent derivative assets Proceeds from Issuance of Subordinated Long-Term Debt Issuance of subordinate notes Credit Facility In January Two Thousand Twenty Five [Member] Credit facility in January 2025. Credit Facility in January 2025 Operating Revenue Operating Revenue Disclosure [Text Block] Operating revenue disclosure. Business Acquisition Business Combination [Axis] Trading Securities Trading Account Asset [Member] Trading account asset. Equity Securities, Allowance for Credit Losses Equity securities, allowance for credit losses Equity Securities, Allowance for Credit Losses Utility Scale Solar Utility Scale Solar [Member] Utility-scale solar. Rider CERC [Member] Rider CERC [Member] Rider CERC Trading Activity, by Type Trading Activity, by Type [Domain] Sustainability Revolving Credit Facility Sustainability revolving credit facility. Sustainability Revolving Credit Facility [Member] Foreign Currency Exchange Rate - Non-current Derivative Contract Foreign Exchange Non Current Derivative Contract [Member] Foreign Exchange - Non- Current Derivative Contract [Member] Number of additional sites which are not under investigation Number Of Additional Sites Which Are Not Under Investigation Number of additional sites which are not under investigation. Depreciation, depletion and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction, Total Depreciation, depletion and amortization Shelf registration for sale of demand notes. Shelf Registration For Sale Of Demand Notes [Member] Shelf Registration for Sale of Demand Notes Statement of Comprehensive Income [Abstract] Leases Leases Leases Other operations and maintenance Utilities Operating Expense, Maintenance and Operations, Total Utilities Operating Expense, Maintenance and Operations Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits, Total Pension and other postretirement benefits Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits Maximum Maximum [Member] Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral Received Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset Total liabilities Liabilities, Fair Value Disclosure Total liabilities Designated as Hedging Instrument Designated as Hedging Instrument [Member] Statistical Measurement Statistical Measurement [Axis] Prepayments Prepaid Expense, Current Prepaid Expense, Current, Total Common stock - no par Common Stock, Value, Issued Effective Income Tax Rate Reconciliation Deduction Qualified Production Activities Effective income tax rate reconciliation deduction qualified production activities. Production tax credits, Percent Electric Transmission Project Electric transmission projects. Electric Transmission Project [Member] Derivative Asset, Current Derivative assets Consolidation Consolidation, Policy [Policy Text Block] Net realized and unrealized changes related to derivative activities Increase (Decrease) in Commodity Contract Assets and Liabilities Repayments Of Supplemental Credit Facility Repayments Repayments of supplemental credit facility repayments. Supplemental credit facility repayments Total shareholders' equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Total equity Total equity Charge for the Impairment of Nonregulated Renewable Natural Gas Facilities Charge for the impairment of nonregulated renewable natural gas facilities. Charge for the impairment of nonregulated renewable natural gas facilities Type of Reserve Type of Reserve [Domain] Affiliated Lease Payables Affiliated lease payables Affiliated lease payables CWA Clean Water Act [Member] Clean water act. Settlements Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements Settlements Preferred Stock Dividends, Income Statement Impact Preferred stock dividends (see Note 15) Net income from continuing operations EPS from continuing operations – Diluted Income (Loss) from Continuing Operations, Per Diluted Share Realized losses Debt And Equity Securities Realized Losses Debt and equity securities realized losses. Line Of Credit Facility Expiration Month And Year Line of credit facility expiration month and year. Line of credit facility, maturity month and year Accrued Liabilities Accrued Liabilities, Total Accrued interest, payroll and taxes Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent State and local income taxes, net of federal income tax effect, Percent Purchases Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases Number of mandatory facility-specific factors Number Of Mandatory Facility Specific Factors Number of mandatory facility-specific factors Preferred stock shares authorized Preferred Stock, Shares Authorized Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest, Total Comprehensive income (loss) attributable to noncontrolling interests Public Utilities One Time Bill Credits To Residential Customers Public utilities one time bill credits to residential customers. Bill credits to residential customers Income taxes refundable through future rates Deferred Income Tax Charge [Member] Income Taxes Refundable through Future Rates Stonepeak Stonepeak. Stonepeak [Member] Total operating expenses Costs and Expenses Foreign Currency Exchange Rate - Current Derivative Contract Foreign Exchange Current Derivative Contract [Member] Foreign Exchange - Current Derivative Contract [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Long-lived assets fair value disclosure. Long Lived Assets Fair Value Disclosure Long-lived assets, estimated fair value Effective Income Tax Computation [Table] Effective Income Tax Computation [Table] Disclosure of information about effective income tax computation. Loss associated with severe weather events, after-tax Loss Associated With Severe Weather Events, After-tax Loss associated with severe weather events, after-tax. Liabilities Derivative Financial Instruments, Liabilities [Member] [Line Items] for Significant Accounting Policies [Table] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Number of optional facility-specific factors Number Of Optional Facility Specific Factors Number of optional facility-specific factors. Entity Registrant Name Entity Registrant Name Debt Disclosure [Text Block] Significant Financing Transactions Environmental Remediation Site Environmental Remediation Site [Domain] Customer Concentration Risk [Member] Customer Concentration Risk Number of sites remediation work substantially completed Number Of Sites Remediation Work Substantially Completed Number of sites remediation work substantially completed. Other income (expense) Other income Other Nonoperating Income (Expense), Total Other Nonoperating Income (Expense) Credit Facility Two In September Two Thousand Twenty Five [Member] Credit facility two in September Two Thousand Twenty Five. Credit Facility Two in September 2025 Other receivables, allowance for doubtful accounts Allowance for Credit Loss, Receivable, Other, Current Accumulated Other Comprehensive Income Loss [Table] Accumulated Other Comprehensive Income (Loss) [Table] Increase (decrease) in prepayments and deposits, net. Increase (Decrease) in Prepayments and Deposits, Net Prepayments and deposits, net Prepayments and deposits, net Gain (loss) on investments, after tax Gain (loss) on investments, after tax Gain Loss On Investments After Tax Gain (loss) on investments after tax. Gains (loss) on investments, after tax Consolidated Entities Consolidated Entities [Domain] Public Utilities Significant Emission Rate Per Year CO2 Equivalent Public Utilities Significant Emission Rate Per Year C O2 Equivalent Public utilities significant emission rate per year CO2 equivalent. Income tax expense (benefit) Income tax expense Income tax expense (benefit) Income Tax Expense (Benefit) Income tax expense (benefit) Price Volatility Price Volatility [Member] Price Volatility [Member] Fixed income securities Total Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Measurement Frequency Measurement Frequency [Axis] Sales [Member] Operating Revenue Other Investments Other Investments, Total Other investments Rider CE Rider C E [Member] Rider CE. Assets held for sale Asset, Held-for-Sale, Not Part of Disposal Group, Current Asset, Held-for-Sale, Not Part of Disposal Group, Current, Total Issuance of common stock Proceeds from Issuance of Common Stock Operating Expenses Costs and Expenses [Abstract] Fair Value Inputs, Assets, Quantitative Information Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Amounts Reclassified To Net Income Loss [Abstract] Amounts reclassified to net income loss. Amounts reclassified to net income (loss): Percentage of equity interest sold to noncontrolling interest owners Subsidiary, Ownership Percentage, Noncontrolling Owner Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Impairment of assets and other charges. Impairment Of Assets And Other Charges [Member] Impairment of Assets and Other Charges Liability Class Liability Class [Axis] Electric Distribution Grid Transformation Projects [Member] Electric distribution grid transformation projects. Electric Distribution Grid Transformation Projects Fair value net derivative asset liability measured on recurring basis unobservable inputs reconciliation regulated operating revenue. Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Regulated Operating Revenue Operating revenue Stock Awards And Stock Options Exercise Shares Stock awards and stock options exercise shares. Stock awards (net of change in unearned compensation) (in shares) Net income attributable to Dominion Energy from continuing operations - Diluted Net Income (Loss) Attributable to Parent, Diluted, Total Net Income (Loss) Attributable to Parent, Diluted Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Accumulated other comprehensive income (loss) Approval Date Approval Date Of Public Utilities Projects Description Description of the approval date of public utilities projects. Consolidation Items Consolidation Items [Axis] Industrial Industrial [Member] Industrial. Commitments and Contingencies Commitments and Contingencies, Policy [Policy Text Block] Capital expenditures Payments to Acquire Property, Plant, and Equipment, Total Plant construction and other property additions Payments to Acquire Property, Plant, and Equipment Other Payment for (Proceeds from) Other Investing Activity Gain (loss) on investments Gain (Loss) on Investments Net (gains) losses on nuclear decommissioning trust funds and other investments Gains (loss) on investments End of Year 2030 End of Year Two Thousand Thirty [Member] End of year two thousand thirty. Total assets Assets Total assets Property, Plant and Equipment [Table] Schedule Of Property Plant And Equipment [Table] Rider OSW. Rider O S W [Member] Rider OSW Income Statement [Abstract] Targeted capacity provided by legislation Power Generation Targeted Capacity Provided By Legislation Power generation, targeted capacity provided by legislation. Increase (Decrease) In Charitable Commitments Increase (decrease) in charitable commitments. Increase in charitable commitments Increase In Proposed Base Rate Percentage Increase in proposed base rate percentage. Increase in proposed base rate percentage Outstanding borrowings, net of repayments, under money pool for non-regulated subsidiaries Related Party Outstanding Borrowing For Non Regulated Subsidiaries Related Party Outstanding Borrowing For Non Regulated Subsidiaries Deferred Income Tax Expense (Benefit) Deferred Income Tax Expense (Benefit), Total Deferred income taxes Deferred income tax expense (benefit) Weighted Average Weighted Average [Member] Contract with Customer, Sales Channel Contract with Customer, Sales Channel [Domain] Less: Net (gains) losses recognized during the period on securities sold during the period Equity Securities, FV-NI, Realized Gain (Loss) Public Utilities Approved Rate Increase Decrease Amount Public Utilities Approved Rate Increase Amount Public utilities approved rate increase decrease amount public utilities approved rate increase amount. Excepted total project cost increase Issuance of stock (in shares) Stock Issued During Period Shares New Issues Issuance of stock to Dominion Energy (in shares) Earnings Per Share, Diluted [Abstract] EPS - Diluted May 2024 At-the-Market Program [Member] May 2024 At-the-Market Program [Member] May 2024 At-the-Market Program [Member] Net income attributable to Dominion Energy Earnings Per Share, Diluted Net income attributable to Dominion Energy Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value, Option, Quantitative Disclosures [Line Items] Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Operating Segments Operating Segments [Member] Increases (reductions) resulting from: Effective Income Tax Rate Reconciliation, Percent [Abstract] Other Other Guarantor Obligations [Member] Other Guarantor Obligations [Member] City Area Code City Area Code Trading Activity Trading Activity [Axis] Short-term borrowing arrangements member. Short-Term Borrowing Arrangements Short Term Borrowing Arrangements [Member] Guarantee Obligation, Maximum Potential Loss Exposure, Outstanding Borrowings Limited Percentage Guarantee obligation, maximum potential loss exposure, outstanding borrowings limited percentage. Other comprehensive income (loss), net of tax Other comprehensive loss, net of tax Other comprehensive income, net of tax Total other comprehensive income (loss) Total other comprehensive income (loss) Natural Gas Rates [Member] Natural Gas Rates. Natural Gas Rates Joint revolving credit facility. Joint Revolving Credit Facility [Member] Joint Revolving Credit Facility Public energy efficiency programs cost rate adjustment approval request to recover amount Public energy efficiency programs cost rate adjustment approval request to recover amount. Public Energy Efficiency Programs Cost Rate Adjustment Approval Request To Recover Amount Restricted Cash and Cash Equivalents, Current, Total Restricted cash and equivalents Restricted Cash and Cash Equivalent, Current Income tax expense (benefit) Income tax (benefit) expense from discontinued operations Income tax expense (benefit) from discontinued operations 364-day term loan facility borrowings Proceeds from Lines of Credit Proceeds from Lines of Credit, Total Line of credit issued Debt issued amount Total Long-term Debt Debt Instrument, Face Amount Net earnings (losses) from discontinued operations including noncontrolling interest Net earnings (losses) from discontinued operations including noncontrolling interest Net Income From Discontinued Operations Including Noncontrolling Interests Net Income (Loss) From Discontinued Operations Including Noncontrolling Interests Facility Limit Line of Credit Facility, Maximum Borrowing Capacity Revolving credit facility maximum borrowing capacity Variable Interest Entity Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Schedule Of Defined Benefit Plans Disclosures [Table] Defined Benefit Plan [Table] Available For Sale Securities Amortized Cost Basis And Other Investments Available for sale securities amortized cost basis and other investments. Amortized Cost, Total Universal service fee Total Revenue Requirement (millions) Total revenue requirement Public Utilities, Requested Rate, Amount Counterparty Name Counterparty Name [Domain] Dominion Energy Virginia Dominion Energy Virginia [Member] Dominion Energy Virginia. Measurement Input, Credit Spread [Member] Credit Spread Utility Plant Utility Plant [Domain] Net derivative (gains) losses-hedging activities Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Real Estate [Domain] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Gross Liabilities Presented in the Consolidated Balance Sheet Derivative Liability, Subject to Master Netting Arrangement, before Offset Letter of Credit Letter of Credit [Member] Wholesale. Wholesale Wholesale [Member] Total property, plant and equipment, net Property, Plant and Equipment, Net Property, plant and equipment Property, Plant and Equipment CVOW Commercial Project C V O W Commercial Project [Member] CVOW commercial project. Regulatory liabilities Regulatory liabilities - noncurrent Regulatory liabilities-noncurrent Contributions from Stonepeak to OSWP Noncontrolling Interest, Period Increase (Decrease) Noncontrolling Interest, Period Increase (Decrease), Total Income from operations Operating Income (Loss) Public Utilities Proposed Rate Start Date Public utilities proposed rate start date. Rate year beginning Termination Fee Receivable Upon Termination Due To Specified Conditions Termination fee receivable upon termination due to specified conditions. Termination fee receivable upon termination due to specified conditions Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred Amount of Gain (Loss) Reclassified From AOCI to Income Retained Earnings Retained Earnings [Member] Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax Alternative minimum tax GW Facility GW facility. GW facility Principal Owner Principal Owner [Member] Transaction Transaction [Domain] Ash Pond And Landfill Closure Costs [Member] Ash pond and landfill closure costs. Ash Pond and Landfill Closure Costs Schedule Of Guarantee Obligations [Table] Guarantor Obligation [Table] Concentration Risk And Guarantor Obligations [Table] Concentration Risk And Guarantor Obligations [Table] Concentration Risk and Guarantor Obligations [Table] Guarantees, Surety Bonds and Letters of Credit Minimum Guarantees, Policy [Policy Text Block] Stock awards (net of change in unearned compensation) Stock Awards And Stock Options Exercise Stock Awards And Stock Options Exercise Fair Value of Derivative Assets Derivative Assets Fair Value Derivative assets fair value. Total derivative assets Derivatives Assets Total long-term debt Long-Term Debt and Lease Obligation Long-term debt Securitization bonds Level 1 Fair Value, Inputs, Level 1 [Member] Public Utilities Operating Expense Estimated Fuel Expenses Under Future Decommissioning Activities Public utilities operating expense estimated fuel expenses under future decommissioning activities Future decommissioning activities Public Utility Public Utility [Axis] Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash provided by financing activities Alternative Revenue Programs Alternative Revenue Programs [Member] Alternative revenue programs. Share of costs not expected to be recovered from customers on the CVOW commercial project, after tax Share of Costs Not Expected to Be Recovered from Customers on The CVOW Commercial Project, After Tax Share of costs not expected to be recovered from customers on the cvow commercial project, after tax. Deferred Income Tax Liabilities, Net Deferred income taxes Total Unrealized Losses Decommissioning Trust Securities Unrealized Losses Decommissioning trust securities unrealized losses. Unrecognized Tax Benefits [Table] Unrecognized tax benefits. Due after five years through ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Renewable Energy Investment Tax Credits Renewable Energy Investment Tax Credits [Member] Renewable energy investment tax credits. Investments, Fair Value Disclosure, Total Investments Investments, Fair Value Disclosure Assets measured at fair value using NAV Alternative Investment Marketable Securities Marketable Securities [Table Text Block] Derivative Contract Derivative Contract [Domain] Public utilities, start date of proposed rate in month and year. Rate year beginning Rate Year Beginning Public Utilities Start Date Of Proposed Rate Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Net realized (gains) losses on investment securities Non-US [Member] International Contract with Customer, Sales Channel Contract with Customer, Sales Channel [Axis] Corporate Debt Securities [Member] Corporate debt instruments Debt Securities Available For Sale [Table] Debt Securities, Available-for-Sale [Table] Entity Interactive Data Current Entity Interactive Data Current Income Statement Location Statement of Income Location, Balance [Domain] Adjustments & Eliminations Eliminations And Reconciling Items [Member] Represents the aggregate total of reconciling items and elimination items. Estimation period of collection to be credited Estimation Period Of Collection To Be Credited Estimation period of collection to be credited. Fair Value Measurement Fair Value Measurement [Domain] Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Repayments of Lines of Credit Repayment of supplemental credit facility borrowings Repayments of supplemental credit facility borrowings. Repayments Of Supplemental Credit Facility Borrowings Supplemental credit facility borrowings Charge For the Impairment of Nonregulated Renewable Natural Gas Facilities, Net of Tax Charge for the impairment of nonregulated renewable natural gas facilities, net of tax. Charge for the impairment of nonregulated renewable natural gas facilities, net of tax Real Estate, Type of Property [Axis] Deferred investment tax credits (benefits). Deferred investment tax credits (benefits) Deferred investment tax credits (benefits) Private Debt Funds, Liquid Investments. Private Debt Funds, Liquid Investments [Member] Private Debt Funds - Liquid Investments Benefit related to the revision of aros for millstone unit 1, net of tax Benefit Related to the Revision of Aros for Millstone Unit 1, Net of Tax Benefit related to the revision of aros for millstone unit 1, net of tax. Market Price Market Price [Member] Market Price [Member] Senior Notes Due in Two Thousand Fifty Six [Member] Senior notes due in two thousand fifty six. Senior Notes Due in 2056 Dividends declared per common share Common Stock, Dividends, Per Share, Declared Purchased Electric Capacity Electricity, Purchased [Member] Increase decrease in annual base fuel component recoveries. Increase Decrease In Annual Base Fuel Component Recoveries Increase decrease in annual base fuel component recoveries Entity Tax Identification Number Entity Tax Identification Number Long-Term Commercial Paper, Current Outstanding Commercial Paper Rider T1. Rider T1 [Member] Rider T1 Schedule Of Regulatory Assets [Table] Regulated Operation, Regulatory Asset [Table] Residential Residential [Member] Residential. Long-Term Debt, Type [Axis] Aggregate Forward Sale Agreement [Member] Aggregate forward sale agreement. Aggregate Forward Sale Agreement Floating Rate Demand Notes Floating Rate Demand Notes [Member] Floating rate demand notes. Construct New Golden-mars Transmission Lines And Related Projects In Loudoun County, Virginia [Member] Construct new golden-mars transmission lines and related projects in loudoun county, Virginia. Construct new Golden-Mars transmission lines and related projects in Loudoun County, Virginia Weighted average useful life Debt Instrument, Term Offsetting Liabilities [Table] Offsetting Liabilities [Table] Power purchase arrangement. Power Purchase Arrangement [Member] Power Purchase Arrangement Local Phone Number Local Phone Number Disallowance of Certain Strategic Undergrounding Costs [Member] Disallowance of certain strategic undergrounding costs. Disallowance of Certain Strategic Undergrounding Costs Related Party Transaction Related Party Transaction [Domain] Fixed income securities Total Unrealized Gains Debt Securities, Available-for-Sale, Unrealized Gain Agreement with Lessor to Construct and Lease Corporate Office Property Built To Suit Lease Arrangement With Lessor To Construct And Lease Corporate Office Property [Member] Built to suit lease arrangement with lessor to construct and lease corporate office property. Charge associated with certain nonregulated solar generation facilities Charge Associated With Certain Nonregulated Solar Generation Facilities Charge associated with certain nonregulated solar generation facilities. Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Net periodic benefit (credit) cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Payable to affiliates Other Other current liabilities Regulatory Liabilities [Line Items] Regulatory Liability [Line Items] Anticipated projected cost Cost Estimate Public Utilities Property Plant And Equipment Expected Cost Of Construction Public utilities, property, plant and equipment, expected cost of construction. Services provided by affiliates Services Provided By Affiliates [Member] Services provided by affiliates. Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Purchased Gas Fair value net derivative asset liability measured on recurring basis unobservable inputs reconciliation purchased gas. Purchased gas Retirement Benefits, Description [Abstract] Guarantee obligations additional guarantees. Guarantee Obligations Additional Guarantees Guarantee obligations additional guarantees Purchased electric capacity Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Purchased Electric Capacity Fair value net derivative asset liability measured on recurring basis unobservable inputs reconciliation purchased electric capacity. Accounting Policies [Abstract] Other Current Liabilities Other Current Liabilities [Member] Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Other comprehensive income (loss) before reclassifications: gains (losses) Offsetting Liabilities [Line Items] Offsetting Liabilities [Line Items] Operating revenue from contracts with customers Revenue from Contract with Customer, Excluding Assessed Tax Maximum Exposure Guarantee liability Guarantor Obligations, Maximum Exposure, Undiscounted Investment Securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Public Utilities, Requested Rate Increase (Decrease), Amount Increase (decrease) in revenue requirement Fixed Price - Natural Gas - Current Derivative Contract Fixed Price Natural Gas Current Derivative Contract [Member] Fixed price - natural gas - current derivative contract. Long-Term Line of Credit, Noncurrent Supplemental credit facility borrowings Additional collateral to be posted if the credit related contingent features were triggered Additional Collateral, Aggregate Fair Value Class of Stock Class of Stock [Domain] Investments Long-Term Investments [Abstract] Dominion Energy Dominion Energy [Member] Dominion Energy. Cash, Cash Equivalents, and Short-Term Investments, Total Cash and cash equivalents Cash, Cash Equivalents, and Short-Term Investments Capitalized Affiliates Lease Cost Capitalized affiliates lease cost. Capitalized affiliates lease cost Affiliated Entity Affiliated Entity [Member] Entity Emerging Growth Company Entity Emerging Growth Company Impairment Of Assets And Other Charges Benefit Impairment of assets and other charges (benefit). Impairment of assets and other charges Impairment of assets and other charges (benefits) Nuclear Decommissioning Trust Fund [Member] Nuclear decommissioning trust fund. Nuclear Decommissioning Trust Fund