XML 95 R74.htm IDEA: XBRL DOCUMENT
v3.22.4

Acquisitions and Dispositions (Sale of Kewaunee) (Narrative) (Detail) - Dominion Energy Kewaunee, Inc - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Dec. 31, 2022 | May 31, 2021
Business Acquisition And Dispositions [Line Items] |  |  |
Percentage of equity interests expected to be sold |  |  | 100.00%
Disposal group, loss (gain) recorded | $ 649 |  |
Disposal group, loss (gain) recorded after tax | $ 513 |  |
Withdrawal to recover nuclear fuel and other permitted costs |  | $ 80 |

X
- Definition Business acquisition and dispositions line items. + References No definition available. + Details
Name: | d_BusinessAcquisitionAndDispositionsLineItems
Namespace Prefix: | d_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disposal group including discontinued operation gain (loss) on disposal. + References No definition available. + Details
Name: | d_DisposalGroupIncludingDiscontinuedOperationGainLossOnDisposal
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Disposal group including discontinued operation gain (loss) on disposal after tax. + References No definition available. + Details
Name: | d_DisposalGroupIncludingDiscontinuedOperationGainLossOnDisposalAfterTax
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of equity interests expected to be sold. + References No definition available. + Details
Name: | d_PercentageOfEquityInterestsExpectedToBeSold
Namespace Prefix: | d_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Withdrawal to recover nuclear fuel and other permitted costs + References No definition available. + Details
Name: | d_WithdrawalToRecoverNuclearFuelAndOtherPermittedCosts
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=d_DominionEnergyKewauneeIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |