XML 93 R141.htm IDEA: XBRL DOCUMENT
v3.19.3

Regulatory Assets and Liabilities (Schedule of Regulatory Liabilities) (Detail) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [1] | $ 356 | $ 193
Regulatory liabilities-noncurrent |  | 6,840 | 6,916
Total regulatory liabilities |  | 7,196 | 7,109
Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current |  | 299 | 127
Regulatory liabilities-noncurrent |  | 4,647 | 4,760
Total regulatory liabilities |  | 4,946 | 4,887
Dominion Energy Gas Holdings, LLC |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [1] | 24 | 21
Regulatory liabilities-noncurrent |  | 765 | 769
Total regulatory liabilities |  | 789 | 790
Income taxes refundable through future rates |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-noncurrent | [2] | 4,071 | 4,058
Income taxes refundable through future rates | Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-noncurrent | [2] | 2,579 | 2,581
Income taxes refundable through future rates | Dominion Energy Gas Holdings, LLC |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-noncurrent | [2] | 530 | 551
Provision for future cost of removal and AROs |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [3] | 117 | 101
Regulatory liabilities-noncurrent | [3] | 1,409 | 1,384
Provision for future cost of removal and AROs | Dominion Energy Gas Holdings, LLC |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [3] | 9 | 7
Regulatory liabilities-noncurrent | [3] | 113 | 124
Unrecognized other postretirement benefit costs | Dominion Energy Gas Holdings, LLC |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-noncurrent | [4] | 106 | 76
Cost-of-service impact of 2017 Tax Reform Act |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [5] | 104 |
Cost-of-service impact of 2017 Tax Reform Act | Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [5] | 95 |
Reserve for rate credits to electric utility customers |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [6] | 71 |
Reserve for rate credits to electric utility customers | Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [6] | 71 |
Nuclear decommissioning trust |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-noncurrent | [7] | 1,070 | 1,121
Nuclear decommissioning trust | Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-noncurrent | [7] | 1,070 | 1,121
Derivatives |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-noncurrent | [8] | 25 | 69
Derivatives | Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-noncurrent | [8] | 25 | 69
Provision for future cost of removal | Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [3] | 92 | 80
Regulatory liabilities-noncurrent | [3] | 940 | 915
Overrecovered gas costs | Dominion Energy Gas Holdings, LLC |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [9] | 7 | 5
Other |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current |  | 64 | 92
Regulatory liabilities-noncurrent |  | 265 | 284
Other | Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current |  | 41 | 47
Regulatory liabilities-noncurrent |  | 33 | 74
Other | Dominion Energy Gas Holdings, LLC |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current |  | 8 | 9
Regulatory liabilities-noncurrent |  | $ 16 | $ 28
[1] | Current regulatory liabilities are presented in other current liabilities in Dominion Energy and Dominion Energy Gas’ Consolidated Balance Sheets.
[2] | Amounts recorded to pass the effect of reduced income tax rates from the 2017 Tax Reform Act to customers in future periods, which will reverse at the weighted average tax rate that was used to build the reserves over the remaining book life of the property, net of amounts to be recovered through future rates to pay income taxes that become payable when rate revenue is provided to recover AFUDC-equity.
[3] | Rates charged to customers by the Companies’ regulated businesses include a provision for the cost of future activities to remove assets that are expected to be incurred at the time of retirement.
[4] | Reflects a regulatory liability for the collection of postretirement benefit costs allowed in rates in excess of expense incurred.
[5] | Balance refundable to customers related to the decrease in revenue requirements for recovery of income taxes at the Companies’ regulated electric generation and electric and natural gas distribution operations. See Note 13 for more information.
[6] | Charge associated with Virginia legislation enacted in March 2018 that requires one-time rate credits of certain amounts to utility customers. See Note 13 for more information.
[7] | Primarily reflects a regulatory liability representing amounts collected from Virginia jurisdictional customers and placed in external trusts (including income, losses and changes in fair value thereon) for the future decommissioning of Virginia Power’s utility nuclear generation stations, in excess of the related AROs.
[8] | As discussed under Derivative Instruments in Note 2, for jurisdictions subject to cost-based rate regulation, changes in the fair value of derivative instruments result in the recognition of regulatory assets or regulatory liabilities as they are expected to be recovered from or refunded to customers.
[9] | Reflects unrecovered or overrecovered gas costs at regulated gas operations, which are recovered or refunded through filings with the applicable regulatory authority.

X
- Definition The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
Name: | us-gaap_RegulatoryLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition The amount for the individual regulatory current liability as itemized in a table of regulatory current liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
Name: | us-gaap_RegulatoryLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_RegulatoryLiabilityNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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_RegulatoryLiabilityAxis=us-gaap_DeferredIncomeTaxChargesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_AssetRetirementObligationCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=d_UnrecognizedOtherPostRetirementBenefitCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=d_CostOfServiceImpactOf2017TaxReformActMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_RevenueSubjectToRefundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_EnvironmentalRestorationCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_DeferredDerivativeGainLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_RemovalCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=d_OverrecoveredGascostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_OtherRegulatoryAssetsLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |