XML 104 R91.htm IDEA: XBRL DOCUMENT
v3.23.1

Regulatory Matters - Schedule of Additional Significant Riders Associated with Virginia Power Projects (Parenthetical) (Detail) - Rider T1 - Virginia Electric and Power Company $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2023 USD ($)
Public Utilities General Disclosures [Line Items] |  |
Total revenue requirement | $ 879 | [1]
Operating Segments | Virginia Regulation |  |
Public Utilities General Disclosures [Line Items] |  |
Total revenue requirement | 369 |
Operating Segments | Virginia Regulation | Transmission Component Of Virginia Powers |  |
Public Utilities General Disclosures [Line Items] |  |
Total revenue requirement | $ 510 |
[1] | Consists of $510 million for the transmission component of Virginia Power's base rates and $369 million for Rider T1.

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 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_PublicUtilitiesRegulatoryProceedingAxis=d_RiderT1Member
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: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
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_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=d_TransmissionComponentOfVirginiaPowersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |