XML 84 R63.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Derivatives and Hedge Accounting Activities (Gains and Losses on Derivatives in Cash Flow Hedging Relationships) (Details) - Cash Flow Hedges - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) | [1] | $ 45 | $ (18) | $ 115 | $ 68
Amount of Gain (Loss) Reclassified From AOCI to Income |  | 29 | 72 | 66 | 174
Increase (Decrease) in Derivatives Subject to Regulatory Treatment | [2] | (42) | 108 | (34) | (241)
Virginia Electric and Power Company |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) | [3] | (5) | (10) | (5) | (24)
Amount of Gain (Loss) Reclassified From AOCI to Income |  | (1) | 0 | (1) | (1)
Increase (Decrease) in Derivatives Subject to Regulatory Treatment | [4] | (42) | 108 | (34) | (241)
Dominion Energy Gas Holdings, LLC |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) | [5] | 18 | (13) | 3 | (23)
Amount of Gain (Loss) Reclassified From AOCI to Income |  | 19 | (2) | 1 | 2
Commodity |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) | [1] | 44 | 12 | 131 | 185
Amount of Gain (Loss) Reclassified From AOCI to Income |  | 21 | 82 | 83 | 187
Increase (Decrease) in Derivatives Subject to Regulatory Treatment | [2] | 0 | 0 | 0 | 0
Commodity | Dominion Energy Gas Holdings, LLC |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) | [5] | 2 | (6) | 4 | (7)
Amount of Gain (Loss) Reclassified From AOCI to Income |  | 1 |  | (3) | 4
Commodity | Operating revenue |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain (Loss) Reclassified From AOCI to Income |  | 19 | 87 | 81 | 201
Commodity | Operating revenue | Dominion Energy Gas Holdings, LLC |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain (Loss) Reclassified From AOCI to Income |  | 1 |  | (3) | 4
Commodity | Electric fuel and other energy-related purchases |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain (Loss) Reclassified From AOCI to Income |  | 2 | (3) | 2 | (6)
Commodity | Purchased Gas |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain (Loss) Reclassified From AOCI to Income |  |  | (2) |  | (8)
Interest rate |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) | [1],[6] | (15) | (23) | (14) | (110)
Amount of Gain (Loss) Reclassified From AOCI to Income | [6] | (11) | (8) | (23) | (11)
Increase (Decrease) in Derivatives Subject to Regulatory Treatment | [2],[6] | (42) | 108 | (34) | (241)
Interest rate | Virginia Electric and Power Company |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) | [3],[7] | (5) | (10) | (5) | (24)
Amount of Gain (Loss) Reclassified From AOCI to Income | [7] | (1) | 0 | (1) | (1)
Increase (Decrease) in Derivatives Subject to Regulatory Treatment | [4],[7] | (42) | 108 | (34) | (241)
Interest rate | Dominion Energy Gas Holdings, LLC |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) | [5],[8] | 0 |  |  | (9)
Amount of Gain (Loss) Reclassified From AOCI to Income | [8] | (1) |  | (2) |
Foreign currency |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) | [1],[9] | 16 | (7) | (2) | (7)
Amount of Gain (Loss) Reclassified From AOCI to Income | [9] | 19 | (2) | 6 | (2)
Increase (Decrease) in Derivatives Subject to Regulatory Treatment | [2],[9] | 0 | 0 | 0 | 0
Foreign currency | Dominion Energy Gas Holdings, LLC |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) | [5],[10] | 16 | (7) | (1) | (7)
Amount of Gain (Loss) Reclassified From AOCI to Income | [10] | $ 19 | $ (2) | $ 6 | $ (2)
[1] | Amounts deferred into AOCI have no associated effect in Dominion Energy’s Consolidated Statements of Income.
[2] | Represents net derivative activity deferred into and amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in Dominion Energy’s Consolidated Statements of Income.
[3] | Amounts deferred into AOCI have no associated effect in Virginia Power’s Consolidated Statements of Income.
[4] | Represents net derivative activity deferred into and amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in Virginia Power’s Consolidated Statements of Income.
[5] | Amounts deferred into AOCI have no associated effect in Dominion Energy Gas' Consolidated Statements of Income.
[6] | Amounts recorded in Dominion Energy’s Consolidated Statements of Income are classified in interest and related charges.
[7] | Amounts recorded in Virginia Power’s Consolidated Statements of Income are classified in interest and related charges.
[8] | Amounts recorded in Dominion Energy Gas' Consolidated Statements of Income are classified in interest and related charges
[9] | Amounts recorded in Dominion Energy’s Consolidated Statements of Income are classified in other income.
[10] | Amounts recorded in Dominion Energy Gas' Consolidated Statements of Income are classified in other income.

X
- Definition The increase (decrease) (net) in instruments designated and qualifying as hedging instruments subject to regulatory treatment. + References No definition available. + Details
Name: | d_IncreaseDecreaseInDerivativesAffectingRegulatoryAssetsAndLiabilities
Namespace Prefix: | d_
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_DerivativeInstrumentsGainLossLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624177-113959 + Details
Name: | us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
Name: | us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
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_DominionEnergyGasHoldingsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |