XML 51 R97.htm IDEA: XBRL DOCUMENT
v3.19.3

Derivatives and Hedge Accounting Activities (Schedule of Derivatives not Designated as Hedging Instruments) (Detail) - Derivatives Not Designated as Hedging Instruments - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Derivative Instruments Gain Loss [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in Income on Derivatives | [1] | $ 13 | $ (8) | $ 10 | $ (15)
Virginia Electric and Power Company |  |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in Income on Derivatives | [2] | (3) | (3) | (12) | (3)
Commodity | Virginia Electric and Power Company |  |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in Income on Derivatives | [2],[3] | (3) | (3) | (12) | (3)
Commodity | Operating Revenue |  |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in Income on Derivatives | [1] | 27 | (9) | 30 | (3)
Commodity | Purchased Gas |  |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in Income on Derivatives | [1] | (11) | 4 | (8) | 4
Commodity | Electric Fuel and Other Energy-Related Purchases |  |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |  |
Amount of Gain (Loss) Recognized in Income on Derivatives | [1] | $ (3) | $ (3) | $ (12) | $ (16)
[1] | Includes derivative activity amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in Dominion Energy’s Consolidated Statements of Income.
[2] | Includes derivative activity amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in Virginia Power’s Consolidated Statements of Income.
[3] | Amounts recorded in Virginia Power’s Consolidated Statements of Income are classified in electric fuel and other energy-related purchases.

X
- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
Name: | us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
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: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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