Beneficial ownership interest

No definition available.

Name:	d_BeneficialOwnershipInterest
Namespace Prefix:	d_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Beneficial ownership percentage of assets held in affiliated trust

+ References

No definition available.

+ Details

Name:	d_BeneficialOwnershipPercentage
Namespace Prefix:	d_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument Measurement Period For Consideration Of Proceeds

+ References

No definition available.

+ Details

Name:	d_DebtInstrumentMeasurementPeriodForConsiderationOfProceeds
Namespace Prefix:	d_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Number of Debt Instruments

+ References

No definition available.

+ Details

Name:	d_DebtInstrumentNumberofDebtInstruments
Namespace Prefix:	d_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Defer Interest Payments On The Hybrids

+ References

No definition available.

+ Details

Name:	d_DeferInterestPaymentsOnHybrids
Namespace Prefix:	d_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Equity Units, Compounded Contract Adjustment Payment Rate

+ References

No definition available.

+ Details

Name:	d_EquityUnitsCompoundedContractAdjustmentPaymentRate
Namespace Prefix:	d_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage In Capital Trust Assets

+ References

No definition available.

+ Details

Name:	d_PercentageInCapitalTrustAssets
Namespace Prefix:	d_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage Interest In Remarketable Subordinated Note

+ References

No definition available.

+ Details

Name:	d_PercentageInterestInRemarketableSubordinatedNote
Namespace Prefix:	d_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Purchase Price Per Share Under Stock Purchase Contract

+ References

No definition available.

+ Details

Name:	d_PurchasePricePerShareUnderStockPurchaseContract
Namespace Prefix:	d_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Shares To Be Issued Under Stock Purchase Contracts

+ References

No definition available.

+ Details

Name:	d_SharesToBeIssuedUnderStockPurchaseContracts
Namespace Prefix:	d_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

These are the number of AMPS shares redeemed during the period.

+ 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 210.5-02.28)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29
-Article 5

+ Details

Name:	us-gaap_AuctionMarketPreferredSecuritiesSharesRedeemed
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The per-share amount at which preferred stock may be called or is subject to redemption through sinking-fund operations or otherwise.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644

+ Details

Name:	us-gaap_AuctionMarketPreferredSecuritiesStockSeriesPerShareRedemptionAmount
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of par or stated value of auction preferred securities.

+ References

+ Details

Name:	us-gaap_AuctionMarketPreferredSecuritiesStockSeriesValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The interest (or dividend) rates earned on action market preferred securities (on an annual basis or APY) for the period reported.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29
-Article 5

+ Details

Name:	us-gaap_AuctionMarketPreferredSecuritiesStockSeriesVariableInterestRateEarned
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

+ Details

Name:	us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Convertible Notes Payable, excluding current portion. Convertible Notes Payable is a written promise to pay a note which can be exchanged for a specified amount of another, related security, at the option of the issuer and the holder.

+ References

+ Details

Name:	us-gaap_ConvertibleLongTermNotesPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRepurchaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Junior Subordinated Notes, which have a lower priority than senior instruments.

+ 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 (SX210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16(a))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20, 22
-Article 5

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 13, 16
-Article 9

+ Details

Name:	us-gaap_JuniorSubordinatedNotes
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. 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 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 2: 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

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20, 22
-Article 5

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The excess of the (1) fair value of consideration transferred to the holders of a security in excess of (2) the carrying amount of the security reported on the registrant's balance sheet, which will be deducted from net earnings to derive net earnings available to common shareholders. This amount is generally an adjustment considered in the computation of earnings per share.

+ References

No definition available.

+ Details

Name:	us-gaap_RedemptionPremium
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The gross value of stock issued during the period upon the conversion of convertible securities.

+ References

+ Details

Name:	us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30, 31
-Article 5

+ Details

Name:	us-gaap_StockIssuedDuringPeriodValueNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CapitalUnitsByClassAxis=us-gaap_CapitalUnitClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CapitalUnitsByClassAxis=us-gaap_CapitalUnitClassBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AuctionMarketPreferredSecuritiesStockSeriesAxis=d_June2006HybridsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AuctionMarketPreferredSecuritiesStockSeriesAxis=d_September2006HybridsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AuctionMarketPreferredSecuritiesStockSeriesAxis=d_June2009HybridsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	invest_InvestmentAxis=d_A783PercentDebenturesDue12012027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=d_VirginiaElectricAndPowerCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=d_SeniorNotesDuein2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=d_SeniorNotesDuein2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_ConvertibleDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=d_EnhancedJuniorSubordinatedNotes5.75Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-Term Debt (Narrative) (Details)		1 Months Ended									12 Months Ended
Long-Term Debt (Narrative) (Details)	Oct. 01, 2024	Jul. 31, 2017 shares	Jul. 31, 2016 shares	Apr. 30, 2016 shares	Dec. 31, 2014 USD ($)	Oct. 31, 2014 USD ($)	Jul. 31, 2014 USD ($)	Jun. 30, 2013 USD ($)	Jan. 31, 2013 USD ($) $ / shares shares	Sep. 30, 2011	Dec. 31, 2015 USD ($) senior_note $ / shares shares	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Mar. 31, 2016 USD ($)	Feb. 29, 2016 USD ($)	Jan. 31, 2016 USD ($)	Nov. 30, 2014 USD ($)	Jul. 01, 2014	Jun. 30, 2009 USD ($)	Sep. 30, 2006 USD ($)	Jul. 01, 2006	Jun. 30, 2006 USD ($)
Debt Instrument [Line Items]
Aggregate outstanding principal amount											$ 25,473,000,000
Make-whole premium amount											$ 0	$ 284,000,000	$ 0
Shares issued in excess of principal amounts related to converted securities													28,000,000
Noncontrolling interest, ownership percentage by parent											100.00%
Beneficial ownership percentage											97.00%
Beneficial ownership interest											3.00%
Percentage in capital trust assets											100.00%
Redemption of units of Dominion Resources Capital Trust I capital securities \| shares									250,000
Dominion Resources Capital Trust I capital securities									$ 250,000,000
Rate of Dominion Resources Capital Trust I capital securities									7.83%
Redemption price per capital security \| $ / shares									$ 1,019.58
Period of deferral						10 years
Period for consideration of proceeds (days)										180 days	365 days
Interest in RSN issued by Dominion (percentage)											5.00%
Scenario, Forecast \| Minimum
Debt Instrument [Line Items]
Shares to be issued under purchase contracts \| shares		11,500,000	8,500,000	8,500,000
Scenario, Forecast \| Maximum
Debt Instrument [Line Items]
Shares to be issued under purchase contracts \| shares		14,400,000	10,000,000	10,000,000
Common Stock
Debt Instrument [Line Items]
Purchase price to be paid under stock purchase contracts \| $ / shares											$ 50
Shares reserved and available for issuance \| shares											40,300,000
Capital Unit, Class A
Debt Instrument [Line Items]
Issuance of Dominion Midstream common units, net of offering costs							$ 1,000,000,000	$ 550,000,000
Payment rate on Equity Units								6.125%										6.375%
Capital Unit, Class B
Debt Instrument [Line Items]
Issuance of Dominion Midstream common units, net of offering costs								$ 550,000,000
Payment rate on Equity Units								6.00%
June 2006 hybrids
Debt Instrument [Line Items]
Interest rate (percentage)																					2.825%	7.50%
Aggregate redemption price paid											$ 14,000,000
Junior subordinated notes																						$ 300,000,000
June 2006 hybrids \| Scenario, Forecast
Debt Instrument [Line Items]
Aggregate redemption price paid														$ 37,000,000
September 2006 hybrids
Debt Instrument [Line Items]
Interest rate (percentage)										2.30%
Aggregate redemption price paid											3,000,000
Junior subordinated notes																				$ 500,000,000
September 2006 hybrids \| Scenario, Forecast
Debt Instrument [Line Items]
Aggregate redemption price paid														$ 2,000,000
June 2009 hybrids
Debt Instrument [Line Items]
Interest rate (percentage)																			8.375%
Aggregate redemption price paid						$ 685,000,000
Junior subordinated notes																			$ 685,000,000
7.83% Debentures due 12/1/2027
Debt Instrument [Line Items]
Interest rate (percentage)									7.83%
Junior subordinated notes									$ 258,000,000
Virginia Electric and Power Company
Debt Instrument [Line Items]
Aggregate outstanding principal amount											$ 9,425,000,000
Senior Notes
Debt Instrument [Line Items]
Number of outstanding series of senior notes \| senior_note											5
Aggregate outstanding principal amount											$ 1,900,000,000
Aggregate redemption price paid											2,200,000,000
Make-whole premium amount					$ 263,000,000
Interest charges					284,000,000
Senior Notes \| Senior Notes Due in 2026 \| Subsequent Event \| Virginia Electric and Power Company
Debt Instrument [Line Items]
Principal amount of notes																$ 750,000,000
Interest rate (percentage)																3.15%
Senior Notes \| Senior Notes Due in 2018 \| Subsequent Event \| Virginia Electric and Power Company \| Scenario, Forecast
Debt Instrument [Line Items]
Principal amount of notes															$ 500,000,000
Interest rate (percentage)															2.125%
Convertible Debt
Debt Instrument [Line Items]
Outstanding contingent convertible senior notes					0							0					$ 22,000,000
Shares issued in excess of principal amounts related to converted securities					$ 26,000,000
Unsecured Junior Subordinated Notes Payable to Affiliated Trusts
Debt Instrument [Line Items]
Aggregate outstanding principal amount											10,000,000
Interest charges											$ 1,000,000	$ 1,000,000	$ 1,000,000
Unsecured Junior Subordinated Notes Payable to Affiliated Trusts \| Enhanced Junior Subordinated Notes, 5.75%
Debt Instrument [Line Items]
Principal amount of notes						$ 685,000,000
Interest rate (percentage)						5.75%
Unsecured Junior Subordinated Notes Payable to Affiliated Trusts \| Enhanced Junior Subordinated Notes, 5.75% \| LIBOR \| Scenario, Forecast
Debt Instrument [Line Items]
Spread on variable rate	3.057%