XML 71 R61.htm IDEA: XBRL DOCUMENT
v3.25.2

Significant Accounting Policies (Schedule of Supplemental Cash Flow Information) (Parenthetical) (Detail) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
Schedule Of Supplemental Cash Flow Information [Line Items] |  |
Financing leases | $ 25 | $ 51
Operating leases | 12 | 145
Virginia Electric and Power Company |  |
Schedule Of Supplemental Cash Flow Information [Line Items] |  |
Financing leases | 22 | 42
Operating leases | $ 7 | $ 129

X
- Definition Financing leases. + References No definition available. + Details
Name: | d_FinancingLeases
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Operating leases. + References No definition available. + Details
Name: | d_OperatingLeases
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Schedule of supplemental cash flow information. + References No definition available. + Details
Name: | d_ScheduleOfSupplementalCashFlowInformationLineItems
Namespace Prefix: | d_
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: |