XML 136 R126.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Long-Term Debt (Total Long Term Debt) (Parenthetical) (Detail) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 28, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Debt Instrument [Line Items] |  |  |  |
Repayment of Debt |  | $ 1,572 | $ 1,610 | $ 892
Term Loans |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Estimated mandatory prepayments due within one year |  | 20 |  |
Dominion Energy Gas Holdings, LLC |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Repayment of Debt |  |  | 400 |
Virginia Electric and Power Company |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Repayment of Debt |  | $ 681 | $ 517 | $ 625
Dominion Energy Midstream Partners, LP | Subsequent Event |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Repayment of Debt | $ 250 |  |  |
2.5% and 2.8%, due 2019 and 2020 | Dominion Energy Gas Holdings, LLC | Senior Notes | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 2.50% |  |
2.5% and 2.8%, due 2019 and 2020 | Dominion Energy Gas Holdings, LLC | Senior Notes | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 2.80% |  |
2.875% to 4.8%, due 2023 to 2044 | Dominion Energy Gas Holdings, LLC | Senior Notes | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 2.875% |  |
2.875% to 4.8%, due 2023 to 2044 | Dominion Energy Gas Holdings, LLC | Senior Notes | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 4.80% |  |
1.2% to 7.25%, due 2017 to 2022 | Virginia Electric and Power Company | Senior Notes | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 1.20% |  |
1.2% to 7.25%, due 2017 to 2022 | Virginia Electric and Power Company | Senior Notes | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 7.25% |  |
2.75% to 8.875%, due 2023 to 2047 | Virginia Electric and Power Company | Senior Notes | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 2.75% |  |
2.75% to 8.875%, due 2023 to 2047 | Virginia Electric and Power Company | Senior Notes | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 8.875% |  |
1.75% to 5.6%, due 2023 to 2041 | Virginia Electric and Power Company | Tax Exempt Financing [Member] | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 1.75% |  |
1.75% to 5.6%, due 2023 to 2041 | Virginia Electric and Power Company | Tax Exempt Financing [Member] | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 5.60% |  |
1.25% to 6.4%, due 2017 to 2022 | Senior Notes | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 1.25% |  |
1.25% to 6.4%, due 2017 to 2022 | Senior Notes | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 6.40% |  |
2.85% to 7.0%, due 2024 to 2044 | Senior Notes | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 2.85% |  |
2.85% to 7.0%, due 2024 to 2044 | Senior Notes | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 7.00% |  |
: 2.579% to 4.104%, due 2019 to 2021 | Unsecured Junior Subordinated Notes | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 2.579% |  |
: 2.579% to 4.104%, due 2019 to 2021 | Unsecured Junior Subordinated Notes | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 4.104% |  |
Payable to Affiliated Trust, 8.4% due 2031 | Unsecured Junior Subordinated Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 8.40% |  |
5.25% and 5.75%, due 2054 and 2076 | Unsecured Junior Subordinated Notes | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 5.25% |  |
5.25% and 5.75%, due 2054 and 2076 | Unsecured Junior Subordinated Notes | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 5.75% |  |
Remarketable Subordinated Notes, 1.5% and 2.0%, due 2020 to 2024 | Remarketable Subordinated Notes | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 1.50% |  |
Remarketable Subordinated Notes, 1.5% and 2.0%, due 2020 to 2024 | Remarketable Subordinated Notes | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 2.00% |  |
6.8% and 6.875%, due 2026 and 2027 | Senior Notes | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 6.80% |  |
6.8% and 6.875%, due 2026 and 2027 | Senior Notes | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 6.875% |  |
5.31% to 6.85%, due 2017 and 2018 | Senior Notes | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 6.85% |  |
5.31% to 6.85%, due 2017 and 2018 | Term Loans | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 5.31% |  |
2.98% to 7.20%, due 2024 to 2051 | Senior Notes | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 2.98% |  |
2.98% to 7.20%, due 2024 to 2051 | Senior Notes | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 7.20% |  |
Tax-Exempt Financing, 1.55%, due 2033 | Term Loans |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 1.55% |  |
Unsecured Senior and Medium Term Notes, 5.83% and 6.48%, due 2018 | Dominion Energy Midstream Partners, LP | Senior Notes | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 5.83% |  |
Unsecured Senior and Medium Term Notes, 5.83% and 6.48%, due 2018 | Dominion Energy Midstream Partners, LP | Senior Notes | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 6.48% |  |
Unsecured Senior Note, 4.875%, due 2041 | Dominion Energy Midstream Partners, LP | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 4.875% |  |
3.53% Due 2028 | Dominion Energy Midstream Partners, LP | Private Placement | Subsequent Event |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Repayment of Debt | $ 100 |  |  |
Interest rate | 3.53% |  |  |
3.91% Due 2038 | Dominion Energy Midstream Partners, LP | Private Placement | Subsequent Event |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Repayment of Debt | $ 150 |  |  |
Interest rate | 3.91% |  |  |
Line of Credit | Virginia Electric and Power Company |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Credit facility, to support letters of credit |  | $ 100 |  |

X
- Definition Estimated Mandatory Prepayments Due Within One Year + References No definition available. + Details
Name: | d_EstimatedMandatoryPrepaymentsDueWithinOneYear
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
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_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
Name: | us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_UnsecuredSeniorNotesTwoPointFiveToTwoPointEightPercentDueTwoThousandNineteenToTwoThousandTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_UnsecuredSeniorNotes2875To48Due2023To2044Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_UnsecuredSeniorNotesOnePointTwoToSevenPointTwoFivePercentDueTwoThousandSeventeenToTwoThousandTwentyTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_UnsecuredSeniorNotesTwoPointSevenFiveToEightPointEightSevenFivePercentDueTwoThousandTwentyThreeToTwoThousandFortySevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_UtilityTaxExemptLoan175To56Due2023To2041Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=d_TaxExemptFinancingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_UnsecuredSeniorNotesOnePointTwoFiveToSixPointFourPercentDueTwoThousandSeventeenToTwoThousandTwentyTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_UnsecuredSeniorNotesTwoPointEightFiveToSevenPointZeroPercentDueTwoThousandTwentyFourToTwoThousandFortyFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_UnsecuredJuniorSubordinatedNotesTwoPointFiveSevenNineToFourPointOneZeroFourPercentDueTwoThousandNineteenToTwoThousandTwentyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_JuniorSubordinatedDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_UnsecuredJuniorSubordinatedNotesPayableToAffiliatedTrusts84PercentDue2031Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_EnhancedJuniorSubordinatedNotesFivePointTwoFiveToFivePointSevenFivePercentDueTwoThousandFiftyFourToTwoThousandSeventySixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_RemarketableSubordinatedNotesOnePointFiveAndTwoPointZeroPercentDueTwoThousandTwentyToTwoThousandTwentyFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SubordinatedDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_A68And6875Due2026And2027Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_UnsecuredSeniorAndMediumTermNotes531To685Due2017And2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_UnsecuredSeniorAndMediumTermNotes298To720Due2024To2051Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_UtilityTaxExemptLoan155Due2033Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_UnsecuredSeniorAndMediumTermNotes583To648Due2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_UnsecuredSeniorNote4875Due2041Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_SeniorNotesThreePointFiveThreePercentDueTwentyTwentyEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=us-gaap_PrivatePlacementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=d_SeniorNotesThreePointNineOnePercentDueTwentyThirtyEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |