XML 67 R51.htm IDEA: XBRL DOCUMENT
v3.22.1

Significant Accounting Policies (Narrative) (Detail) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2022
Change in Depreciation Rates from New Depreciation Study |  |
Significant Accounting Policies [Line Items] |  |
Increase in EPS | $ 0.01 |
Change in Depreciation Rates from New Depreciation Study | Forecast |  |
Significant Accounting Policies [Line Items] |  |
Increase in EPS |  | $ 0.05
Virginia Electric and Power Company | Change in Depreciation Rates from New Depreciation Study |  |
Significant Accounting Policies [Line Items] |  |
Increase (decrease) in depreciation expense | $ (15) |
Increase (decrease) in depreciation expense, after tax | $ (11) |
Virginia Electric and Power Company | Change in Depreciation Rates from New Depreciation Study | Forecast |  |
Significant Accounting Policies [Line Items] |  |
Increase (decrease) in depreciation expense |  | $ (60)
Increase (decrease) in depreciation expense, after tax |  | $ (45)
Four Brothers And Three Cedars | Dominion Energy Midstream Partners, LP | Terra Nova Renewable Partners | Nonregulated Solar Projects |  |
Significant Accounting Policies [Line Items] |  |
Percentage of equity interest sold to noncontrolling interest owners | 33.00% |

X
- Definition Increase Decrease In Earnings Per Share + References No definition available. + Details
Name: | d_IncreaseDecreaseInEarningsPerShare
Namespace Prefix: | d_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition [Line Items] for Significant Accounting Policies [Table] + References No definition available. + Details
Name: | d_SignificantAccountingPoliciesLineItems
Namespace Prefix: | d_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Utilities operating expense, increase (decrease) in depreciation and amortization. + References No definition available. + Details
Name: | d_UtilitiesOperatingExpenseIncreaseDecreaseInDepreciationAndAmortization
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Utilities operating expense, increase (decrease) in depreciation and amortization, after tax. + References No definition available. + Details
Name: | d_UtilitiesOperatingExpenseIncreaseDecreaseInDepreciationAndAmortizationAfterTax
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ChangeInAccountingEstimateByTypeAxis=d_ChangeInDepreciationRatesFromNewDepreciationStudyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
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_BusinessAcquisitionAxis=d_FourBrothersAndThreeCedarsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=d_DominionEnergyMidstreamPartnersLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=d_TerraNovaRenewablePartnersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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