XML 115 R92.htm IDEA: XBRL DOCUMENT
v3.20.4

Income Taxes (Schedule of Deferred Income Taxes) (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred income taxes: |  |
Total deferred income tax assets | $ 3,285 | $ 3,736
Total deferred income tax liabilities | 9,069 | 9,883
Total net deferred income tax liabilities | 5,784 | 6,147
Plant and equipment, primarily depreciation method and basis differences | 5,824 | 6,616
Excess deferred income taxes | (1,142) | (1,306)
Unrecovered NND Project costs | 529 | 553
DESC rate refund | (140) | (169)
Toshiba Settlement | (204) | (219)
Nuclear decommissioning | 991 | 909
Deferred state income taxes | 702 | 863
Federal benefit of deferred state income taxes | (147) | (184)
Deferred fuel, purchased energy and gas costs | (28) |
Deferred fuel, purchased energy and gas costs |  | 30
Pension benefits | 239 | 174
Other postretirement benefits | (14) | (37)
Loss and credit carryforwards | (1,534) | (1,832)
Valuation allowances | 155 | 161
Partnership basis differences | 593 | 823
Other | (40) | (235)
Total net deferred income tax liabilities | 5,784 | 6,147
Deferred Investment Tax Credits – Regulated Operations | 169 | 130
Total Deferred Taxes and Deferred Investment Tax Credits | 5,953 | 6,277
Virginia Electric and Power Company |  |
Deferred income taxes: |  |
Total deferred income tax assets | 1,204 | 1,207
Total deferred income tax liabilities | 3,832 | 4,058
Total net deferred income tax liabilities | 2,628 | 2,851
Plant and equipment, primarily depreciation method and basis differences | 3,227 | 3,359
Excess deferred income taxes | (656) | (672)
Unrecovered NND Project costs | 0 | 0
DESC rate refund | 0 | 0
Toshiba Settlement | 0 | 0
Nuclear decommissioning | 303 | 290
Deferred state income taxes | 305 | 302
Federal benefit of deferred state income taxes | (64) | (63)
Deferred fuel, purchased energy and gas costs | (34) |
Deferred fuel, purchased energy and gas costs |  | 1
Pension benefits | (105) | (153)
Other postretirement benefits | 76 | 62
Loss and credit carryforwards | (354) | (280)
Valuation allowances | 6 | 5
Partnership basis differences | 0 | 0
Other | (76) | 0
Total net deferred income tax liabilities | 2,628 | 2,851
Deferred Investment Tax Credits – Regulated Operations | 151 | 111
Total Deferred Taxes and Deferred Investment Tax Credits | $ 2,779 | $ 2,962

X
- Definition Deferred tax assets deferred fuel purchased energy and gas costs. + References No definition available. + Details
Name: | d_DeferredTaxAssetsDeferredFuelPurchasedEnergyAndGasCosts
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards + References No definition available. + Details
Name: | d_DeferredTaxAssetsOperatingLossAndTaxCreditCarryforwards
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Deferred tax assets tax deferred expense compensation and benefits postretirement benefits (expenses). + References No definition available. + Details
Name: | d_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefitsExpenses
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Deferred Tax Liabilities and Deferred Investment Tax Credits, Net + References No definition available. + Details
Name: | d_DeferredTaxLiabilitiesAndDeferredInvestmentTaxCreditsNet
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Deferred tax liabilities deferred fuel, purchased energy and gas costs. + References No definition available. + Details
Name: | d_DeferredTaxLiabilitiesDeferredFuelPurchasedEnergyAndGasCosts
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Deferred tax liabilities, excess deferred income taxes. + References No definition available. + Details
Name: | d_DeferredTaxLiabilitiesExcessDeferredIncomeTaxes
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Deferred Tax Liabilities Federal Benefit Of Deferred State Income Taxes + References No definition available. + Details
Name: | d_DeferredTaxLiabilitiesFederalBenefitOfDeferredStateIncomeTaxes
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Deferred Tax Liabilities Nuclear Decommissioning + References No definition available. + Details
Name: | d_DeferredTaxLiabilitiesNuclearDecommissioning
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Deferred Tax Liabilities Partnership Basis Differences + References No definition available. + Details
Name: | d_DeferredTaxLiabilitiesPartnershipBasisDifferences
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Deferred tax liabilities settlements. + References No definition available. + Details
Name: | d_DeferredTaxLiabilitiesSettlements
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Deferred Tax Liabilities State Income Taxes + References No definition available. + Details
Name: | d_DeferredTaxLiabilitiesStateIncomeTaxes
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Deferred tax liabilities tax deferred expense compensation and (provision) benefits pensions. + References No definition available. + Details
Name: | d_DeferredTaxLiabilitiesTaxDeferredExpenseCompensationAndProvisionBenefitsPensions
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Deferred tax liabilities tax refund. + References No definition available. + Details
Name: | d_DeferredTaxLiabilitiesTaxRefund
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Deferred tax liabilities unrecovered project costs. + References No definition available. + Details
Name: | d_DeferredTaxLiabilitiesUnrecoveredProjectCosts
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Deferred Tax Liabilities Valuation Allowance + References No definition available. + Details
Name: | d_DeferredTaxLiabilitiesValuationAllowance
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The noncurrent portion of the reserve for accumulated deferred investment tax credits as of the balance sheet date. This is the remaining investment credit, which will reduce the cost of services collected from ratepayers by a ratable portion over the investment's regulatory life. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 255 -SubTopic 10 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121605250&loc=d3e2408-110839 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.26(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 27 -URI http://asc.fasb.org/extlink&oid=120406818&loc=d3e32262-109318 + Details
Name: | us-gaap_AccumulatedDeferredInvestmentTaxCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(26)(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(15)(b)(2)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(15)(2)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(26)(a)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DeferredIncomeTaxLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
Name: | us-gaap_DeferredTaxAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 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 http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 + Details
Name: | us-gaap_DeferredTaxAssetsOther
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120406818&loc=d3e31931-109318 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
Name: | us-gaap_DeferredTaxLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 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 http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 + Details
Name: | us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
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: |