XML 151 R130.htm IDEA: XBRL DOCUMENT
v3.22.4

Regulatory Matters - Summary of Virginia Power Electric Transmission Project Applied (Detail) - Virginia Electric and Power Company $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) mi kV
Elmont-Ladysmith rebuild and related projects in the Counties of Hanover and Caroline, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2021-04
Approval Date | 2022-04
Type of Line | kV | 500
Miles of Lines | mi | 26
Cost Estimate | $ | $ 95
Rebuild transmission lines and related projects in the City of Staunton and County of Augusta, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2021-11
Approval Date | 2022-08
Type of Line | kV | 230
Miles of Lines | mi | 21
Cost Estimate | $ | $ 45
Build new Dulles Towne Center substation and line loop in the County of Loudoun, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2021-12
Approval Date | 2022-07
Type of Line | kV | 230
Miles of Lines | mi | 1
Cost Estimate | $ | $ 105
Build new Aviator substation and line loop in the County of Loudoun, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-02
Approval Date | 2022-11
Type of Line | kV | 230
Miles of Lines | mi | 1
Cost Estimate | $ | $ 80
Nimbus line loop and substation and new 230 kV line in the County of Loudon, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-02
Approval Date | 2022-10
Type of Line | kV | 230
Miles of Lines | mi | 1
Cost Estimate | $ | $ 40
Partial rebuild of Bristers-Ox 115 kV line in Fauquier and Prince William Counties, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-08
Type of Line | kV | 115
Miles of Lines | mi | 15
Cost Estimate | $ | $ 40
Construct new switching station, substations, transmission lines and related projects in Lunenberg and Mecklenburg Counties Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-10
Type of Line | kV | 230
Miles of Lines | mi | 18
Cost Estimate | $ | $ 230
Construct new switching station, substation, transmission lines and related projects in Charlotte, Halifax and Mecklenburg Counties, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-10
Type of Line | kV | 230
Miles of Lines | mi | 26
Cost Estimate | $ | $ 215
Construct new Mars and Wishing Star substations, transmission lines and related projects in Loudoun County, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-10
Type of Line | 500/230 kV
Miles of Lines | mi | 4
Cost Estimate | $ | $ 720
Construct new Altair switching station, transmission lines and related projects in Loudoun County, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-11
Type of Line | 230 kV
Miles of Lines | mi | 2
Cost Estimate | $ | $ 50
Construct new Cirrus and Keyser switching stations, transmission lines and related projects in Culpeper, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-11
Type of Line | 230 kV
Miles of Lines | mi | 5
Cost Estimate | $ | $ 65

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 Approval date of public utilities transmission. + References No definition available. + Details
Name: | d_ApprovalDateOfPublicUtilitiesTransmission
Namespace Prefix: | d_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
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 Kilo Volt Line One + References No definition available. + Details
Name: | d_KiloVoltLineOne
Namespace Prefix: | d_
Data Type: | xbrli:stringItemType
Balance Type: | na
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, 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 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
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=d_ElmontLadysmithRebuildAndRelatedProjectsInCountiesOfHanoverAndCarolineVirginiaMember
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_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=d_RebuildTransmissionLinesAndRelatedProjectsInTheCityOfStauntonAndCountyOfAugustaVirginiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=d_BuildNewDTCSubstationAndLineLoopInTheCountyOfLoudounVirginiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=d_BuildNewAviatorSubstationAndLineLoopInTheCountyOfLoudounVirginiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=d_NimbusLineLoopAndSubstationAndNew230KvLineInTheCountyOfLoudonVirginiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=d_PartialRebuildOfBristersOx115KvLineInFauquierAndPrinceWilliamCountiesVirginiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=d_ConstructNewSwitchingStationSubstationsTransmissionLinesAndRelatedProjectsInLunenbergAndMecklenburgCountiesVirginiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=d_ConstructNewSwitchingStationSubstationTransmissionLinesAndRelatedProjectsInCharlotteHalifaxAndMecklenburgCountiesVirginiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=d_ConstructNewMarsAndWishingStarSubstationsTransmissionLinesAndRelatedProjectsInLoudounCountyVirginiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=d_ConstructNewAltairSwitchingStationTransmissionLinesAndRelatedProjectsInLoudounCountyVirginiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=d_ConstructNewCirrusAndKeyserSwitchingStationsTransmissionLinesAndRelatedProjectsInCulpeperVirginiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |