XML 157 R135.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Regulatory Assets and Liabilities (Schedule of Regulatory Liabilities) (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current |  | $ 522 | $ 748
Regulatory liabilities-noncurrent |  | 8,674 | 8,435
Total regulatory liabilities |  | 9,196 | 9,183
Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current |  | 321 | 506
Regulatory liabilities-noncurrent |  | 5,978 | 5,517
Total regulatory liabilities |  | $ 6,299 | 6,023
SCANA |  |  |
Regulatory Liabilities [Line Items] |  |  |
Estimation period of collection to be credited |  | 11 years |
Electric service customers over period |  | 20 years |
Provision for future cost of removal and AROs |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [1] | $ 118 | 111
Regulatory liabilities-noncurrent | [1] | 1,818 | 1,731
Provision for future cost of removal and AROs | Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [1] | 118 | 111
Regulatory liabilities-noncurrent | [1] | 1,185 | 1,135
Reserve for refunds and rate credits to electric utility customers |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [2] | 83 | 125
Regulatory liabilities-noncurrent | [2] | 237 | 325
Reserve for refunds and rate credits to electric utility customers | Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [2] | 0 | 25
Regulatory liabilities-noncurrent | [2] | 0 | 0
Income taxes refundable through future rates |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [3] | 107 | 100
Regulatory liabilities-noncurrent | [3] | 3,076 | 3,187
Income taxes refundable through future rates | Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [3] | 70 | 65
Regulatory liabilities-noncurrent | [3] | 2,237 | 2,290
Monetization of guarantee settlement |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [4] | 67 | 67
Regulatory liabilities-noncurrent | [4] | $ 635 | 702
Electric service customers over period |  | 20 years |
Other |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current |  | $ 140 | 134
Regulatory liabilities-noncurrent |  | 286 | 191
Other | Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current |  | 133 | 129
Regulatory liabilities-noncurrent |  | 225 | 167
Nuclear decommissioning trust |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-noncurrent | [5] | 2,098 | 1,685
Nuclear decommissioning trust | Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-noncurrent | [5] | 2,098 | 1,685
Interest rate hedges |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-noncurrent | [6] | 233 | 240
Interest rate hedges | Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-noncurrent | [6] | 233 | 240
Overrecovered Other Postretirement Benefit Costs |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-noncurrent | [7] | 155 | 140
Unrecognized Pension and Other Postretirement Benefit Costs | East Ohio, PSNC and Questar Gas |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-noncurrent |  | 12 | 6
Derivatives |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [8] | 7 | 211
Regulatory liabilities-noncurrent | [8] | 136 | 234
Derivatives | Virginia Electric and Power Company |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory liabilities-current | [8] | 0 | 176
Regulatory liabilities-noncurrent | [8] | $ 0 | $ 0
[1] | Rates charged to customers by Dominion Energy and Virginia Power’s 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.
[2] | Reflects amounts previously collected from retail electric customers of DESC for the NND Project to be credited over an estimated 11-year period effective February 2019, in connection with the SCANA Merger Approval Order. Also reflects amounts to be refunded to jurisdictional retail electric customers in Virginia associated with the settlement of the 2021 Triennial Review. See Note 13 for additional information.
[3] | Amounts recorded to pass the effect of reduced income taxes from the 2017 Tax Reform Act to customers in future periods, which will primarily 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.
[4] | Reflects amounts to be refunded to DESC electric service customers over a 20-year period ending in 2039 associated with the monetization of a bankruptcy settlement agreement.
[5] | 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, as applicable) for the future decommissioning of Virginia Power’s utility nuclear generation stations, in excess of the related AROs.
[6] | Reflects interest rate hedges recoverable from or refundable to customers. Certain of these instruments are settled and any related payments are being amortized into interest expense over the life of the related debt, which has a weighted-average useful life of approximately 25 years and 24 years for Dominion Energy and Virginia Power, respectively, as of December 31, 2023.
[7] | Reflects a regulatory liability for the collection of postretirement benefit costs allowed in rates in excess of expense incurred.
[8] | Represents changes in the fair value of derivatives, excluding separately presented interest rate hedges, that following settlement are expected to be recovered from or refunded to customers.

X
- Definition Electric service customers over period. + References No definition available. + Details
Name: | d_ElectricServiceCustomersOverPeriod
Namespace Prefix: | d_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimation period of collection to be credited. + References No definition available. + Details
Name: | d_EstimationPeriodOfCollectionToBeCredited
Namespace Prefix: | d_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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 -Topic 980 -SubTopic 405 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481854/980-405-25-1 + 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 -Topic 980 -SubTopic 405 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481854/980-405-25-1 + 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 -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + 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: | us-gaap_BusinessAcquisitionAxis=d_SCANAMember
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=us-gaap_RevenueSubjectToRefundMember
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=d_MonetizationOfGuaranteeSettlementMember
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: |

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

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

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

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

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

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