XML 96 R100.htm IDEA: XBRL DOCUMENT
v3.20.1

Regulatory Matters - Schedule of Developments for Significant Riders Associated with Virginia Power Projects (Detail) - Virginia Electric and Power Company - Rider US-3 $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2020 USD ($)
Public Utilities General Disclosures [Line Items] |
Application Date | 2019-07
Approval Date | March 2020
Rate Year Beginning | 2020-06
Total Revenue Requirement (millions) | $ 28
Increase (decrease) in revenue requirement | $ 18

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 Description of the approval date of public utilities projects. + References No definition available. + Details
Name: | d_ApprovalDateOfPublicUtilitiesProjectsDescription
Namespace Prefix: | d_
Data Type: | xbrli:stringItemType
Balance Type: | na
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 Amount of public utility's approved rate increase (decrease) by regulatory agency. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesApprovedRateIncreaseDecreaseAmount
Namespace Prefix: | us-gaap_
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: | dei_LegalEntityAxis=d_VirginiaElectricAndPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderUS3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |