XML 137 R127.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Long-Term Debt (Based on Stated Maturity Dates Rather than Early Redemption Dates that Could be Elected by Instrument Holders) (Detail) $ in Millions | Dec. 31, 2017 USD ($)
--- | ---
Debt Instrument [Line Items] |  |
2018 | $ 3,311 |
2019 | 4,286 |
2020 | 2,035 |
2021 | 2,185 |
2022 | 1,534 |
Thereafter | 20,942 |
Total | $ 34,293 |
Weighted- average Coupon, 2018 | 3.62% |
Weighted- average Coupon, 2019 | 2.89% |
Weighted- average Coupon, 2020 | 2.58% |
Weighted- average Coupon, 2021 | 3.12% |
Weighted- average Coupon, 2022 | 2.97% |
Weighted- average Coupon, Thereafter | 4.38% |
Unsecured Senior Notes |  |
Debt Instrument [Line Items] |  |
2018 | $ 3,275 | [1]
2019 | 3,400 | [1]
2020 | 1,000 | [1]
2021 | 900 | [1]
2022 | 1,500 | [1]
Thereafter | 17,058 | [1]
Total | 27,133 | [1]
Tax-Exempt Financings |  |
Debt Instrument [Line Items] |  |
Thereafter | 805 |
Total | 805 |
Term Loans |  |
Debt Instrument [Line Items] |  |
2018 | 36 | [2]
2019 | 336 | [2]
2020 | 35 | [2]
2021 | 35 | [2]
2022 | 34 | [2]
Thereafter | 462 | [2]
Total | 938 | [2]
Unsecured Junior Subordinated Notes Payable to Affiliated Trusts |  |
Debt Instrument [Line Items] |  |
Thereafter | 10 |
Total | 10 |
Unsecured Junior Subordinated Notes |  |
Debt Instrument [Line Items] |  |
2019 | 550 |
2020 | 1,000 |
2021 | 550 |
Total | 2,100 |
Unsecured Junior Subordinated Notes |  |
Debt Instrument [Line Items] |  |
Thereafter | 1,907 |
Total | 1,907 |
Remarketable Subordinated Notes |  |
Debt Instrument [Line Items] |  |
2021 | 700 |
Thereafter | 700 |
Total | 1,400 |
Dominion Energy Gas Holdings, LLC |  |
Debt Instrument [Line Items] |  |
2019 | 450 |
2020 | 700 |
Thereafter | 2,450 |
Total | $ 3,600 |
Weighted- average Coupon, 2019 | 2.50% |
Weighted- average Coupon, 2020 | 2.80% |
Weighted- average Coupon, Thereafter | 3.90% |
Virginia Electric and Power Company |  |
Debt Instrument [Line Items] |  |
2018 | $ 850 |
2019 | 350 |
2022 | 750 |
Thereafter | 9,468 |
Total | $ 11,418 |
Weighted- average Coupon, 2018 | 4.17% |
Weighted- average Coupon, 2019 | 5.00% |
Weighted- average Coupon, 2022 | 3.15% |
Weighted- average Coupon, Thereafter | 4.33% |
Virginia Electric and Power Company | Unsecured Senior Notes |  |
Debt Instrument [Line Items] |  |
2018 | $ 850 |
2019 | 350 |
2022 | 750 |
Thereafter | 8,690 |
Total | 10,640 |
Virginia Electric and Power Company | Tax-Exempt Financings |  |
Debt Instrument [Line Items] |  |
Thereafter | 778 |
Total | $ 778 |
[1] | In February 2018, $250 million of Dominion Energy Questar Pipeline's senior notes were repaid using proceeds from the January 2018 issuance, through private placements, of $100 million of 3.53% senior notes and $150 million of 3.91% senior notes that mature in 2028 and 2038, respectively. As a result, at December 31, 2017, $250 million was included in long-term debt in the Consolidated Balance Sheets.
[2] | Excludes mandatory prepayments associated with SBL Holdco and Dominion Solar Projects III, Inc. based on cash flows in excess of debt service. At December 31, 2017, $20 million of estimated mandatory prepayments due within one year were included in securities due within one year in Dominion Energy's Consolidated Balance Sheets.

X
- Definition Debt, Weighted Average Coupon Interest Rate, Maturities, after Year Five + References No definition available. + Details
Name: | d_DebtWeightedAverageCouponInterestRateMaturitiesAfterYearFive
Namespace Prefix: | d_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt, Weighted Average Coupon Interest Rate, Maturities, Year Five + References No definition available. + Details
Name: | d_DebtWeightedAverageCouponInterestRateMaturitiesYearFive
Namespace Prefix: | d_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt, Weighted Average Coupon Interest Rate, Maturities, Year Four + References No definition available. + Details
Name: | d_DebtWeightedAverageCouponInterestRateMaturitiesYearFour
Namespace Prefix: | d_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt, Weighted Average Coupon Interest Rate, Maturities, Year One + References No definition available. + Details
Name: | d_DebtWeightedAverageCouponInterestRateMaturitiesYearOne
Namespace Prefix: | d_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt, Weighted Average Coupon Interest Rate, Maturities, Year Three + References No definition available. + Details
Name: | d_DebtWeightedAverageCouponInterestRateMaturitiesYearThree
Namespace Prefix: | d_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt, Weighted Average Coupon Interest Rate, Maturities, Year Two + References No definition available. + Details
Name: | d_DebtWeightedAverageCouponInterestRateMaturitiesYearTwo
Namespace Prefix: | d_
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, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: 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)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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

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

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=d_UnsecuredJuniorSubordinatedNotesPayableToAffiliatedTrustsMember
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_LongtermDebtTypeAxis=d_EnhancedJuniorSubordinatedNotesMember
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: | 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: |