XML 111 R101.htm IDEA: XBRL DOCUMENT
v3.25.3

Regulatory Matters (Narrative) (Detail) | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Oct. 31, 2025 USD ($) MW | Sep. 30, 2025 USD ($) | Aug. 31, 2025 USD ($) | Jun. 30, 2025 USD ($) | Mar. 31, 2025 USD ($) Components Project MW | Feb. 28, 2025 | Jan. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) mi kV | Oct. 31, 2024 USD ($) MW | Apr. 30, 2020 | Sep. 30, 2024 USD ($) | Mar. 31, 2024 USD ($) | Sep. 30, 2025 USD ($) | Apr. 30, 2025 USD ($) $ / shares
Targeted To Reach By End Of Year Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Energy efficiency target percentage. based on energy savings from 2019 baseline |  |  |  |  |  |  |  |  |  | 5.00% |  |  |  |
Virginia Regulation | 2025 Biennial Review |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Requested alternative amount base rate increase effective January 2026 |  |  |  |  | $ 458,000,000 |  |  |  |  |  |  |  |  |
Requested alternative amount base rate increase effective January 2027 |  |  |  |  | 173,000,000 |  |  |  |  |  |  |  |  |
Percentage of earned return |  |  |  |  |  |  |  |  |  |  |  |  | 7.77% |
Authorized return percentage |  |  |  |  |  |  |  |  |  |  |  |  | 9.70% |
Base rate increase effective January 2026 |  |  | $ 706,000,000 |  | 822,000,000 |  |  |  |  |  |  |  |  |
Base rate increase effective January 2027 |  |  | $ 256,000,000 |  | $ 345,000,000 |  |  |  |  |  |  |  |  |
Proposed base rates reflect an ROE |  |  |  |  |  |  |  |  |  |  |  |  | 52.10% |
Common equity capitalization to total capitalization ratio |  |  |  |  |  |  |  |  |  |  |  |  | 10.40% |
South Carolina Regulation |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write down certain materials and supplies inventory |  |  |  |  |  |  |  |  |  |  | $ 50,000,000 |  |  |
South Carolina Regulation | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Charge in connection with the electric base rate case |  |  |  |  |  |  |  |  |  |  | 58,000,000 |  |  |
Charge in connection with the electric base rate case, after tax |  |  |  |  |  |  |  |  |  |  | $ 44,000,000 |  |  |
Subsequent Event | North Carolina Regulation | Virginia Power Fuel Filing |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) In fuel component of electric rates | $ 49,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Virginia Electric and Power Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock shares authorized but unissued shares |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,500,000,000
Common stock par value | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0
Percentage of energy savings target for 2026 |  |  |  |  |  | 3.00% |  |  |  |  |  |  |  |
Percentage of energy savings target for 2027 |  |  |  |  |  | 4.00% |  |  |  |  |  |  |  |
Percentage of energy savings target for 2028 |  |  |  |  |  | 5.00% |  |  |  |  |  |  |  |
Virginia Electric and Power Company | Impairment of Assets and Other Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of assets and other charges (benefits) |  |  |  |  |  |  |  |  |  |  |  | $ (17,000,000) |  |
Impairment of assets and other charges (benefits) after tax |  |  |  |  |  |  |  |  |  |  |  | $ (12,000,000) |  |
Virginia Electric and Power Company | Utility Scale Solar |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proposed cost of project |  |  |  |  |  |  |  |  | $ 605,000,000 |  |  |  |  |
Targeted capacity provided by legislation | MW |  |  |  |  |  |  |  |  | 208 |  |  |  |  |
Virginia Electric and Power Company | GTSA Filing |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Mainfeeders Requested Approval for power undertook | Components |  |  |  |  | 3 |  |  |  |  |  |  |  |  |
Number of additional feeders request approval | Components |  |  |  |  | 20 |  |  |  |  |  |  |  |  |
New project on remote sensing, image management and analytical program | Project |  |  |  |  | 1 |  |  |  |  |  |  |  |  |
Proposed capital investment |  |  |  |  | $ 278,000,000 |  |  |  |  |  |  |  |  |
Proposed operations and maintenance investment |  |  |  |  | 5,000,000 |  |  |  |  |  |  |  |  |
Virginia Electric and Power Company | Chesterfield Energy Reliability Center |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proposed cost of project |  |  |  |  | $ 1,500,000,000 |  |  |  |  |  |  |  |  |
Targeted capacity provided by legislation | MW |  |  |  |  | 944 |  |  |  |  |  |  |  |  |
Virginia Electric and Power Company | Virginia Regulation | Annual Fuel Factor |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue requirement |  |  |  |  | $ 2,600,000,000 |  |  |  |  |  |  |  |  |
Rate year beginning |  |  |  |  | 2025-07 |  |  |  |  |  |  |  |  |
Increase (decrease) in revenue requirement |  |  |  |  | $ 860,000,000 |  |  |  |  |  |  |  |  |
Estimated under-recovered balances |  |  |  |  | 205,000,000 |  |  |  |  |  |  |  |  |
Purchased capacity expense |  |  |  |  | $ 120,000,000 |  |  |  |  |  |  |  |  |
Virginia Electric and Power Company | Subsequent Event | Utility Scale Solar |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Targeted capacity provided by legislation | MW | 5 |  |  |  |  |  |  |  |  |  |  |  |  |
Virginia Electric and Power Company | Subsequent Event | Energy Storage |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Targeted capacity provided by legislation | MW | 155 |  |  |  |  |  |  |  |  |  |  |  |  |
Virginia Electric and Power Company | Subsequent Event | Utility Scale Solar and Energy Storage |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proposed cost of project | $ 2,900,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy South Carolina Inc | Natural Gas Rates |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue requirement |  | $ 594,000,000 |  | $ 596,000,000 |  |  |  |  |  |  |  |  |  |
Approved base rate increase effective January 2026 |  | $ 15,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Base rate increase effective January 2026 |  |  |  | $ 17,000,000 |  |  |  |  |  |  |  |  |  |
Dominion Energy South Carolina Inc | South Carolina Regulation | Electric DSM Programs |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public energy efficiency programs cost rate adjustment approval request to recover amount |  |  |  |  |  |  | $ 46,000,000 |  |  |  |  |  |  |
Dominion Energy South Carolina Inc | South Carolina Regulation | Cost of Fuel |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate year beginning |  |  |  |  |  | 2025-05 |  |  |  |  |  |  |  |
Application date |  |  |  |  |  | 2025-02 |  |  |  |  |  |  |  |
Proposed increase (decrease) in annual base fuel component recoveries |  |  |  |  |  |  |  |  |  |  |  |  | $ 154,000,000 |
Dominion Energy South Carolina Inc | South Carolina Regulation | Electric Transmission Projects |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Application date |  |  |  |  |  |  |  | 2024-12 |  |  |  |  |  |
Type of Line | kV |  |  |  |  |  |  |  | 230 |  |  |  |  |  |
Miles of Lines | mi |  |  |  |  |  |  |  | 17 |  |  |  |  |  |
Cost Estimate |  |  |  |  |  |  |  | $ 55,000,000 |  |  |  |  |  |

X
- Definition Application date of public utilities transmission. + References No definition available. + Details
Name: | d_ApplicationDateOfPublicUtilitiesTransmission
Namespace Prefix: | d_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Asset impairment charge (benefit). + References No definition available. + Details
Name: | d_AssetImpairmentChargeBenefit
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Asset impairment charge (benefit), after tax. + References No definition available. + Details
Name: | d_AssetImpairmentChargeBenefitAfterTax
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Charge for electric base rate case. + References No definition available. + Details
Name: | d_ChargeForElectricBaseRateCase
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Charge for electric base rate case after tax. + References No definition available. + Details
Name: | d_ChargeForElectricBaseRateCaseAfterTax
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Common stock shares authorized amount but unissued. + References No definition available. + Details
Name: | d_CommonStockSharesAuthorizedAmountButUnissued
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Increase (Decrease) In fuel component electric rates. + References No definition available. + Details
Name: | d_IncreaseDecreaseInFuelComponentOfElectricRates
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Kilo Volt Line. + References No definition available. + Details
Name: | d_KiloVoltLine1
Namespace Prefix: | d_
Data Type: | dtr-types:voltageItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of energy efficiency target based on energy savings from previous year baseline. + References No definition available. + Details
Name: | d_PercentageOfEnergyEfficiencyTargetBasedOnEnergySavingsFromPreviousYearBaseline
Namespace Prefix: | d_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of energy savings target for next twelve months + References No definition available. + Details
Name: | d_PercentageOfEnergySavingsTargetForNextTwelveMonths
Namespace Prefix: | d_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of energy savings target for three year. + References No definition available. + Details
Name: | d_PercentageOfEnergySavingsTargetForThreeYear
Namespace Prefix: | d_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of energy savings target for two year + References No definition available. + Details
Name: | d_PercentageOfEnergySavingsTargetForTwoYear
Namespace Prefix: | d_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Power generation, targeted capacity provided by legislation. + References No definition available. + Details
Name: | d_PowerGenerationTargetedCapacityProvidedByLegislation
Namespace Prefix: | d_
Data Type: | dtr-types:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proposed increase (decrease) in annual base fuel component recoveries. + References No definition available. + Details
Name: | d_ProposedIncreaseDecreaseInAnnualBaseFuelComponentRecoveries
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public energy efficiency programs cost rate adjustment approval request to recover amount. + References No definition available. + Details
Name: | d_PublicEnergyEfficiencyProgramsCostRateAdjustmentApprovalRequestToRecoverAmount
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public utilities actual earned return on equity percentage. + References No definition available. + Details
Name: | d_PublicUtilitiesActualEarnedReturnOnEquityPercentage
Namespace Prefix: | d_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public utilities approved base rate increase (decrease) amount Effective January 2026. + References No definition available. + Details
Name: | d_PublicUtilitiesApprovedBaseRateIncreaseDecreaseAmountEffectiveJanuaryTwoThousandTwentySix
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public utilities authorized return on equity percentage. + References No definition available. + Details
Name: | d_PublicUtilitiesAuthorizedReturnOnEquityPercentage
Namespace Prefix: | d_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public utilities base rate increase (decrease) effective January 2027. + References No definition available. + Details
Name: | d_PublicUtilitiesBaseRateIncreaseDecreaseEffectiveJanuaryTwoThousandTwentySeven
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public utilities base rate increase (decrease) effective January 2026. + References No definition available. + Details
Name: | d_PublicUtilitiesBaseRateIncreaseDecreaseEffectiveJanuaryTwoThousandTwentySix
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public utilities, length of transmission line. + References No definition available. + Details
Name: | d_PublicUtilitiesLengthOfTransmissionLine
Namespace Prefix: | d_
Data Type: | dtr-types:lengthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public utilities materials and supplies inventory write down. + References No definition available. + Details
Name: | d_PublicUtilitiesMaterialsAndSuppliesInventoryWriteDown
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public utilities new project on remote sensing, image management and analytical program. + References No definition available. + Details
Name: | d_PublicUtilitiesNewProjectOnRemoteSensingImageManagementAndAnalyticalProgram
Namespace Prefix: | d_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public utilities number of mainfeeders requested approval. + References No definition available. + Details
Name: | d_PublicUtilitiesNumberOfMainfeedersRequestedApproval
Namespace Prefix: | d_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public utilities operating expense estimated fuel expenses under recovered balance. + References No definition available. + Details
Name: | d_PublicUtilitiesOperatingExpenseEstimatedFuelExpensesUnderRecoveredBalance
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public utilities, property, plant and equipment, expected cost of construction. + References No definition available. + Details
Name: | d_PublicUtilitiesPropertyPlantAndEquipmentExpectedCostOfConstruction
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Public utilities property plant and equipment requested cost of construction. + References No definition available. + Details
Name: | d_PublicUtilitiesPropertyPlantAndEquipmentRequestedCostOfConstruction
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Public utilities, proposed capital investment. + References No definition available. + Details
Name: | d_PublicUtilitiesProposedCapitalInvestment
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public utilities, proposed operations and maintenance investment. + References No definition available. + Details
Name: | d_PublicUtilitiesProposedOperationsAndMaintenanceInvestment
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public utilities proposes to number of additional feeders requested approval. + References No definition available. + Details
Name: | d_PublicUtilitiesProposesToNumberOfAdditionalFeedersRequestedApproval
Namespace Prefix: | d_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public utilities, purchased capacity expense. + References No definition available. + Details
Name: | d_PublicUtilitiesPurchasedCapacityExpense
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public utilities requested alternative amount base rate increase (decrease) effective January 2016. + References No definition available. + Details
Name: | d_PublicUtilitiesRequestedAlternativeAmountBaseRateIncreaseDecreaseAmountEffectiveJanuaryTwoThousandTwentySix
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public utilities requested alternative amount base rate increase (decrease) effective January 2017. + References No definition available. + Details
Name: | d_PublicUtilitiesRequestedAlternativeAmountBaseRateIncreaseDecreaseEffectiveJanuaryTwoThousandTwentySeven
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utilities, Requested Rate, Amount + References No definition available. + Details
Name: | d_PublicUtilitiesRequestedRateAmount
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public utilities, start date of proposed rate in month and year. + References No definition available. + Details
Name: | d_PublicUtilitiesStartDateOfProposedRate
Namespace Prefix: | d_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face amount per share of no-par value common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_CommonStockNoParValue
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of public utility's requested equity to capital, including debt and equity. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedEquityCapitalStructurePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of public utility's requested rate increase (decrease) with regulatory agency. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of public utility's requested return on equity. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_StatementScenarioAxis=d_TargetedToReachByEndOfYearFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAgencyAxis=d_VirginiaRegulationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_TwentyTwentyFiveBiennialReviewMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAgencyAxis=d_SouthCarolinaRegulationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAgencyAxis=d_NorthCarolinaRegulationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_VirginiaPowerFuelFilingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=d_VirginiaElectricAndPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=d_ImpairmentOfAssetsAndOtherChargesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=d_UtilityScaleSolarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=d_VirginiaGridTransformationAndSecurityActOf2018FilingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=d_ChesterfieldEnergyReliabilityCenterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_AnnualFuelFactorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=d_EnergyStorageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=d_UtilityScaleSolarAndEnergyStorageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=d_DominionEnergySouthCarolinaIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_NaturalGasRatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_ElectricDSMProgramsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_CostOfFuelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_ElectricTransmissionProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |