XML 106 R85.htm IDEA: XBRL DOCUMENT
v3.22.4

Income Taxes (Schedule of Deductible Loss and Credit Carryforwards) (Detail) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($)
Deductible loss and credit carryforwards [Line Items] |
Deductible amount | $ 6,505
Losses, Deferred tax asset | 1,830
Losses, Valuation allowance | (138)
Virginia Electric and Power Company |
Deductible loss and credit carryforwards [Line Items] |
Deductible amount | 513
Losses, Deferred tax asset | 751
Losses, Valuation allowance | (7)
Federal |
Deductible loss and credit carryforwards [Line Items] |
Deductible amount | 794
Losses, Deferred tax asset | $ 167
Losses, Expiration Period | 2037
Federal | Investment Credits |
Deductible loss and credit carryforwards [Line Items] |
Tax credits, Deferred tax asset | $ 874
Federal | Investment Credits | Virginia Electric and Power Company |
Deductible loss and credit carryforwards [Line Items] |
Tax credits, Deferred tax asset | $ 631
Federal | Investment Credits | Earliest Tax Year |
Deductible loss and credit carryforwards [Line Items] |
Tax Credits, Expiration Period | 2036
Federal | Investment Credits | Earliest Tax Year | Virginia Electric and Power Company |
Deductible loss and credit carryforwards [Line Items] |
Tax Credits, Expiration Period | 2036
Federal | Investment Credits | Latest Tax Year |
Deductible loss and credit carryforwards [Line Items] |
Tax Credits, Expiration Period | 2042
Federal | Investment Credits | Latest Tax Year | Virginia Electric and Power Company |
Deductible loss and credit carryforwards [Line Items] |
Tax Credits, Expiration Period | 2042
Federal | Federal Production and Other Credits |
Deductible loss and credit carryforwards [Line Items] |
Tax credits, Deferred tax asset | $ 84
Federal | Federal Production and Other Credits | Virginia Electric and Power Company |
Deductible loss and credit carryforwards [Line Items] |
Tax credits, Deferred tax asset | $ 80
Federal | Federal Production and Other Credits | Earliest Tax Year |
Deductible loss and credit carryforwards [Line Items] |
Tax Credits, Expiration Period | 2036
Federal | Federal Production and Other Credits | Earliest Tax Year | Virginia Electric and Power Company |
Deductible loss and credit carryforwards [Line Items] |
Tax Credits, Expiration Period | 2036
Federal | Federal Production and Other Credits | Latest Tax Year |
Deductible loss and credit carryforwards [Line Items] |
Tax Credits, Expiration Period | 2042
Federal | Federal Production and Other Credits | Latest Tax Year | Virginia Electric and Power Company |
Deductible loss and credit carryforwards [Line Items] |
Tax Credits, Expiration Period | 2042
State |
Deductible loss and credit carryforwards [Line Items] |
Deductible amount | $ 5,711
Losses, Deferred tax asset | 306
Losses, Valuation allowance | (51)
State minimum tax credits | 271
State | Virginia Electric and Power Company |
Deductible loss and credit carryforwards [Line Items] |
Deductible amount | 513
Losses, Deferred tax asset | $ 31
Losses, Expiration Period | 2042
State | Earliest Tax Year |
Deductible loss and credit carryforwards [Line Items] |
Losses, Expiration Period | 2023
State | Latest Tax Year |
Deductible loss and credit carryforwards [Line Items] |
Losses, Expiration Period | 2042
State | Investment and Other Credits |
Deductible loss and credit carryforwards [Line Items] |
Losses, Valuation allowance | $ (87)
Tax credits, Deferred tax asset | 128
State | Investment and Other Credits | Virginia Electric and Power Company |
Deductible loss and credit carryforwards [Line Items] |
Losses, Valuation allowance | (7)
Tax credits, Deferred tax asset | $ 9
Tax Credits, Expiration Period | 2024
State | Investment and Other Credits | Earliest Tax Year |
Deductible loss and credit carryforwards [Line Items] |
Tax Credits, Expiration Period | 2023
State | Investment and Other Credits | Latest Tax Year |
Deductible loss and credit carryforwards [Line Items] |
Tax Credits, Expiration Period | 2032

X
- Definition Deductible loss and credit carryforwards. + References No definition available. + Details
Name: | d_DeductibleLossAndCreditCarryforwardsLineItems
Namespace Prefix: | d_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Operating loss carryforward, expiration year. + References No definition available. + Details
Name: | d_OperatingLossCarryforwardExpirationYear
Namespace Prefix: | d_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tax credit carryforward, expiration year. + References No definition available. + Details
Name: | d_TaxCreditCarryforwardExpirationYear
Namespace Prefix: | d_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319 + Details
Name: | us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319 + Details
Name: | us-gaap_DeferredTaxAssetsTaxCreditCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319 + Details
Name: | us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
Name: | us-gaap_OperatingLossCarryforwardsValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_DomesticCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=us-gaap_InvestmentCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_EarliestTaxYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_LatestTaxYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=d_FederalProductionAndOtherCreditsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_StateAndLocalJurisdictionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=d_InvestmentAndOtherCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |