XML 81 R60.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Derivatives and Hedge Accounting Activities (Volume of Derivative Activity) (Details) - 6 months ended Jun. 30, 2017 MMcf in Thousands | USD ($) MWh MMcf gal | EUR (€)
--- | --- | ---
Fixed Price - Natural Gas - Current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | [1] | 90 |
Fixed Price - Natural Gas - Current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | [1] | 44 |
Fixed Price - Natural Gas - Current Derivative Contract | Dominion Energy Gas Holdings, LLC |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) |  | 2 |
Fixed Price - Natural Gas - Non-current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | [1] | 17 |
Fixed Price - Natural Gas - Non-current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | [1] | 7 |
Basis - Natural Gas - Current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) |  | 158 |
Basis - Natural Gas - Current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) |  | 51 |
Basis - Natural Gas - Current Derivative Contract | Dominion Energy Gas Holdings, LLC |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) |  | 2 |
Basis - Natural Gas - Non-current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) |  | 597 |
Basis - Natural Gas - Non-current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) |  | 549 |
Fixed Price - Electricity - Current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of electricity (MWh) | MWh |  | 9,879,568 |
Fixed Price - Electricity - Current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Volume of electricity (MWh) | MWh | [1] | 1,561,090 |
Fixed Price - Electricity - Non-current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of electricity (MWh) | MWh |  | 1,107,760 |
Fixed Price - Electricity - Non-current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Volume of electricity (MWh) | MWh | [1] | 1,107,760 |
Financial Transmission Rights - Electricity- Current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of electricity (MWh) | MWh |  | 100,076,734 |
Financial Transmission Rights - Electricity- Current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Volume of electricity (MWh) | MWh |  | 95,128,929 |
Financial Transmission Rights - Electricity- Non-current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of electricity (MWh) | MWh |  | 0 |
Liquids - Current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | gal | [2] | 53,831,712 |
Liquids - Current Derivative Contract | Dominion Energy Gas Holdings, LLC |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | gal |  | 45,767,712 |
Liquids - Non-current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | gal | [2] | 0 |
Foreign currency |  |  |
Derivative [Line Items] |  |  |
Interest rate / Foreign currency (US Dollars, Euros) | € | [3],[4] |  | € 250,000,000
Foreign currency | Dominion Energy Gas Holdings, LLC |  |  |
Derivative [Line Items] |  |  |
Interest rate / Foreign currency (US Dollars, Euros) | € |  |  | € 250,000,000
Foreign Exchange - Current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Interest rate / Foreign currency (US Dollars, Euros) | $ | [3],[4] | $ 0 |
Foreign Exchange - Current Derivative Contract | Dominion Energy Gas Holdings, LLC |  |  |
Derivative [Line Items] |  |  |
Interest rate / Foreign currency (US Dollars, Euros) | $ | [5] | 0 |
Foreign Exchange - Non- Current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Interest rate / Foreign currency (US Dollars, Euros) | $ | [3],[4] | 280,000,000 |
Foreign Exchange - Non- Current Derivative Contract | Dominion Energy Gas Holdings, LLC |  |  |
Derivative [Line Items] |  |  |
Interest rate / Foreign currency (US Dollars, Euros) | $ | [5] | 280,000,000 |
Interest Rate - Current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Interest rate / Foreign currency (US Dollars, Euros) | $ | [4] | 1,550,000,000 |
Interest Rate - Current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Interest rate / Foreign currency (US Dollars, Euros) | $ | [6] | 1,050,000,000 |
Interest Rate - Non-current Derivative Contract |  |  |
Derivative [Line Items] |  |  |
Interest rate / Foreign currency (US Dollars, Euros) | $ | [4] | 5,057,909,202 |
Interest Rate - Non-current Derivative Contract | Virginia Electric and Power Company |  |  |
Derivative [Line Items] |  |  |
Interest rate / Foreign currency (US Dollars, Euros) | $ | [6] | $ 1,150,000,000 |
[1] | Includes options.
[2] | Includes NGLs and oil.
[3] | Euro equivalent volumes are €250,000,000.
[4] | Maturity is determined based on final settlement period.
[5] | Maturity is determined based on final settlement period. Euro equivalent volumes are €250,000,000
[6] | Maturity is determined based on final settlement period.

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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: | num: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: | num:volumeItemType
Balance Type: | na
Period Type: | duration

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: | dei_LegalEntityAxis=d_DominionEnergyGasHoldingsLLCMember
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_BasisNaturalGasCurrentDerivativeContractMember
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_FixedPriceElectricityCurrentDerivativeContractMember
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_FinancialTransmissionRightsElectricityCurrentDerivativeContractMember
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_LiquidsCurrentDerivativeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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