XML 121 R95.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Property, Plant and Equipment (Narrative) (Details) - Dominion Gas Holdings, LLC - Oil and Gas Properties a in Thousands, $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2016 USD ($) a | Sep. 30, 2015 USD ($) a field | Mar. 31, 2015 USD ($) a natural_gas_producer field | Nov. 30, 2014 USD ($) a field | Dec. 31, 2013 USD ($) a natural_gas_producer | Sep. 30, 2015 USD ($) a field | Mar. 31, 2015 USD ($) a field | Dec. 31, 2016 USD ($) a | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) a
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |
After tax gain on sale |  |  |  |  |  | $ 29 | $ 43 |  |  |
Marcellus Shale |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |
Number of natural gas producers | natural_gas_producer |  |  |  |  | 2 |  |  |  |  |
Development rights (in acres) | a |  |  | 11 | 24 | 100 |  | 11 | 4 |  | 100
Amount of consideration |  |  |  | $ 120 | $ 200 |  |  | $ 10 |  | $ 200
Period for payments related to conveyance of natural gas storage fields |  |  |  | 4 years | 9 years |  |  |  |  |
Proceeds from assignment of Shale Development Rights |  |  | $ 27 | $ 60 |  |  |  |  | $ 16 | 100
Number of natural gas storage fields | field |  |  | 1 | 1 |  |  | 1 |  |  |
Number of acres included in initial conveyance | a |  |  |  | 12 |  |  |  |  |  |
Marcellus Shale | Amended Agreement to Extend Conveyance of Development Rights |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |
Number of natural gas producers | natural_gas_producer |  |  | 1 |  |  |  |  |  |  |
Development rights (in acres) | a | 70 |  | 9 |  |  |  | 9 |  |  |
Period for payments related to conveyance of natural gas storage fields |  |  | 2 years |  |  |  |  |  |  |
Partial interest percentage conveyed | 32.00% |  |  |  |  |  |  |  |  |
Marcellus Shale | Other operations and maintenance expense |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |
Gain from sale |  |  | $ 27 | $ 60 |  |  |  | 10 |  | 20
After tax gain on sale |  |  | 16 | $ 36 |  |  |  | $ 6 |  | $ 12
Marcellus Shale | Other operations and maintenance expense | Amended Agreement to Extend Conveyance of Development Rights |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue recognized | $ 35 |  | 43 |  |  |  |  |  |  |
Revenue recognized net of tax | $ 21 |  | $ 27 |  |  |  |  |  |  |
Utica and Point Pleasant Shale |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |
Development rights (in acres) | a |  | 16 |  |  |  | 16 |  |  |  |
Amount of consideration |  | $ 52 |  |  |  | $ 52 |  |  |  |
Proceeds from assignment of Shale Development Rights |  | $ 52 |  |  |  |  |  |  |  |
Number of natural gas storage fields | field |  | 1 |  |  |  | 1 |  |  |  |
Utica and Point Pleasant Shale | Other operations and maintenance expense |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |
Gain from sale |  | $ 52 |  |  |  |  |  |  |  |
After tax gain on sale |  | $ 29 |  |  |  |  |  |  |  |

X
- Definition Deferred Revenue, Revenue Recognized, Net of Tax + References No definition available. + Details
Name: | d_DeferredRevenueRevenueRecognizedNetofTax
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Gain (Loss) on Disposition of Property Plant And Equipment, Net of Tax + References No definition available. + Details
Name: | d_GainLossonDispositionofPropertyPlantAndEquipmentNetofTax
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Gas and Oil Area, Developed, Net, Interest Conveyed, Percentage + References No definition available. + Details
Name: | d_GasandOilAreaDevelopedNetInterestConveyedPercentage
Namespace Prefix: | d_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Initial Conveyance of Gas and Oil Area, Developed, Net + References No definition available. + Details
Name: | d_InitialConveyanceofGasandOilAreaDevelopedNet
Namespace Prefix: | d_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Oil and Gas Property, Number of Natural Gas Storage Fields + References No definition available. + Details
Name: | d_OilandGasPropertyNumberofNaturalGasStorageFields
Namespace Prefix: | d_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Significant Acquisitions and Disposals, Number of Natural Gas Producers that Rights in Acreage were Conveyed + References No definition available. + Details
Name: | d_SignificantAcquisitionsandDisposalsNumberofNaturalGasProducersthatRightsinAcreagewereConveyed
Namespace Prefix: | d_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Significant Acquisitions and Disposals, Period for Payments Related to Conveyance of Natural Gas Storage Fields + References No definition available. + Details
Name: | d_SignificantAcquisitionsandDisposalsPeriodforPaymentsRelatedtoConveyanceofNaturalGasStorageFields
Namespace Prefix: | d_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A + Details
Name: | us-gaap_DeferredRevenueRevenueRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References No definition available. + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
Name: | us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fractional interest owned based on working interests or other economic arrangements of area spaced or assigned to productive wells. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1208 -Paragraph (a) + Details
Name: | us-gaap_GasAndOilAreaDevelopedNet
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
Name: | us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OilAndGasPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=d_MarcellusShaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DeferredRevenueArrangementTypeAxis=d_AmendedAgreementtoExtendConveyanceofDevelopmentRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=d_OtherOperationsandMaintenanceExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=d_UticaandPointPleasantShaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |