This item represents the entity's aggregate generation capacity from long-term power and capacity contracts.

No definition available.

Name:	d_AggregateGenerationCapacity
Namespace Prefix:	d_
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- Definition

Costs incurred in purchasing electric capacity.

+ References

No definition available.

+ Details

Name:	d_CostPurchasedElectricCapacity
Namespace Prefix:	d_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Long Term Capacity Contract Non Utility Generators

+ References

No definition available.

+ Details

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Namespace Prefix:	d_
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- Definition

Shared Services Purchased

+ References

No definition available.

+ Details

Name:	d_SharedServicesPurchased
Namespace Prefix:	d_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Cost incurred in providing energy services during the reporting period.

+ 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 210.5-03.2(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_CostOfServicesEnergyServices
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment.

+ References

No definition available.

+ Details

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

- Definition

The cash outflow associated with the purchase of noncontrolling interest during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

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

- Details

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Balance Type:	na
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- Definition

Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 5A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=28200181&loc=SL6759159-111685

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=d_DominionGasHoldingsLLCMember
Namespace Prefix:
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- Details

Name:	dei_LegalEntityAxis=d_VirginiaElectricAndPowerCompanyMember
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- Details

Name:	us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=d_JuniperMember
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- Details

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Variable Interest Entities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Aug. 31, 2013	Sep. 30, 2014
Variable Interest Entity [Line Items]
Acquisition of Juniper noncontrolling interest in Fairless	$ 0	$ 923	$ 0
Virginia Electric and Power Company
Variable Interest Entity [Line Items]
Number of non utility generators	5
Aggregate generation capacity from long-term power and capacity contracts (MW)	870
Remaining purchase commitments	639
Payment for electric capacity	223	217	214
Payment for electric energy	138	98	83
Shared services purchased	335	331	328
Dominion Gas Holdings, LLC
Variable Interest Entity [Line Items]
Shared services purchased	106	115	107
Juniper
Variable Interest Entity [Line Items]
Acquisition of Juniper noncontrolling interest in Fairless				$ 923
Variable Interest Entity, Not Primary Beneficiary \| Gas Distribution \| Atlantic Coast Pipeline \| Pipelines \| Jointly Owned Natural Gas Pipeline
Variable Interest Entity [Line Items]
Initial membership interest percentage					45.00%