XML 100 R84.htm IDEA: XBRL DOCUMENT
v3.22.1

Derivatives and Hedge Accounting Activities (Volume of Derivative Activity) (Detail) - 3 months ended Mar. 31, 2022 kr in Millions, $ in Millions | USD ($) MWh Bcf | DKK (kr)
--- | --- | ---
Fixed Price - Natural Gas - Current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity | Bcf | [1] | 29 |
Fixed Price - Natural Gas - Current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity | Bcf | [1] | 21 |
Basis - Natural Gas - Current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity | Bcf | [1] | 155 |
Basis - Natural Gas - Current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity | Bcf | [1] | 146 |
Fixed Price - Electricity - Current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of electricity | MWh |  | 15 |
Fixed Price - Electricity - Current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Volume of electricity | MWh |  | 7 |
Financial Transmission Rights - Electricity- Current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of electricity | MWh |  | 18 |
Financial Transmission Rights - Electricity- Current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Volume of electricity | MWh |  | 18 |
Interest Rate - Current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Derivative payment | $ | [2] | $ 1,637 |
Interest Rate - Current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Derivative payment | $ | [2] | $ 1,100 |
Foreign Currency Exchange Rate - Current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Derivative payment | kr | [2] |  | kr 520
Foreign Currency Exchange Rate - Current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Derivative payment | kr | [2] |  | 520
Fixed Price - Natural Gas - Non-current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity | Bcf | [1] | 0 |
Fixed Price - Natural Gas - Non-current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity | Bcf | [1] | 0 |
Basis - Natural Gas - Non-current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity | Bcf | [1] | 465 |
Basis - Natural Gas - Non-current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity | Bcf | [1] | 463 |
Fixed Price - Electricity - Non-current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of electricity | MWh |  | 35 |
Fixed Price - Electricity - Non-current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Volume of electricity | MWh |  | 9 |
Financial Transmission Rights - Electricity- Non-current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of electricity | MWh |  | 0 |
Financial Transmission Rights - Electricity- Non-current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Volume of electricity | MWh |  | 0 |
Interest Rate - Non-current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Derivative payment | $ | [2] | $ 12,809 |
Interest Rate - Non-current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Derivative payment | $ | [2] | $ 2,800 |
Foreign Currency Exchange Rate - Non-current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Derivative payment | kr | [2] |  | 4,530
Foreign Currency Exchange Rate - Non-current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Derivative payment | kr | [2] |  | kr 4,530
[1] | Includes options.
[2] | Maturity is determined based on final settlement period.

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal energy measure used to calculate payments on a derivative instrument. + References No definition available. + Details
Name: | us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:energyItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal volume used to calculate payments on a derivative instrument. + References No definition available. + Details
Name: | us-gaap_DerivativeNonmonetaryNotionalAmountVolume
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959 + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=d_FixedPriceNaturalGasCurrentDerivativeContractMember
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_DerivativeInstrumentRiskAxis=d_BasisNaturalGasCurrentDerivativeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=d_FixedPriceElectricityCurrentDerivativeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=d_FinancialTransmissionRightsElectricityCurrentDerivativeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=d_InterestRateCurrentDerivativeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=d_ForeignExchangeCurrentDerivativeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=d_FixedPriceNaturalGasNoncurrentDerivativeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=d_BasisNaturalGasNoncurrentDerivativeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=d_FixedPriceElectricityNoncurrentDerivativeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=d_FinancialTransmissionRightsElectricityNoncurrentDerivativeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=d_InterestRateNoncurrentDerivativeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=d_ForeignExchangeNonCurrentDerivativeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |