XML 163 R141.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Regulatory Matters - Schedule of Additional Significant Riders Associated with Virginia Power Projects (Detail) - Virginia Electric and Power Company $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 USD ($)
Rider CCR |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2023-02 |
Approval Date | October 2023 |
Rate Year Beginning | 2023-12 |
Total Revenue Requirement (millions) | $ 194 | [1]
Increase (Decrease) Over Previous Year | $ (37) |
Rider CE |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2022-10 | [2]
Approval Date | April 2023 | [2]
Rate Year Beginning | 2023-05 | [2]
Total Revenue Requirement (millions) | $ 89 | [1],[2]
Increase (Decrease) Over Previous Year | $ 18 | [2]
Rider CE |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2023-10 | [3]
Approval Date | Pending | [3]
Rate Year Beginning | 2024-05 | [3]
Total Revenue Requirement (millions) | $ 137 | [1],[3]
Increase (Decrease) Over Previous Year | $ 48 | [3]
Rider E |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2023-01 |
Approval Date | September 2023 |
Rate Year Beginning | 2023-11 |
Total Revenue Requirement (millions) | $ 109 | [1]
Increase (Decrease) Over Previous Year | $ 8 |
Rider E |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2024-01 |
Approval Date | Pending |
Rate Year Beginning | 2024-11 |
Total Revenue Requirement (millions) | $ 72 | [1]
Increase (Decrease) Over Previous Year | $ (37) |
Rider GT |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2023-08 |
Approval Date | Pending |
Rate Year Beginning | 2024-06 |
Total Revenue Requirement (millions) | $ 145 | [1]
Increase (Decrease) Over Previous Year | $ 131 |
Rider GV |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2023-06 | [4]
Approval Date | February 2024 | [4]
Rate Year Beginning | 2024-04 | [4]
Total Revenue Requirement (millions) | $ 132 | [1],[4]
Increase (Decrease) Over Previous Year | $ 5 | [4]
Rider GV |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2023-06 | [4]
Approval Date | February 2024 | [4]
Rate Year Beginning | 2025-04 | [4]
Total Revenue Requirement (millions) | $ 135 | [1],[4]
Increase (Decrease) Over Previous Year | $ 3 | [4]
Rider OSW |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2022-11 |
Approval Date | July 2023 |
Rate Year Beginning | 2023-09 |
Total Revenue Requirement (millions) | $ 271 | [1]
Increase (Decrease) Over Previous Year | $ 192 |
Rider OSW |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2023-11 |
Approval Date | Pending |
Rate Year Beginning | 2024-09 |
Total Revenue Requirement (millions) | $ 486 | [1]
Increase (Decrease) Over Previous Year | $ 215 |
Rider R |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2021-06 |
Approval Date | March 2022 |
Rate Year Beginning | 2023-04 |
Total Revenue Requirement (millions) | $ 55 | [1],[5]
Increase (Decrease) Over Previous Year | $ (4) |
Rider BW |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2021-10 |
Approval Date | May 2022 |
Rate Year Beginning | 2023-09 |
Total Revenue Requirement (millions) | $ 120 | [1]
Increase (Decrease) Over Previous Year | $ (25) |
Rider RGGI |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2022-12 | [6]
Approval Date | July 2023 | [6]
Rate Year Beginning | 2023-09 | [6]
Total Revenue Requirement (millions) | $ 356 | [1],[6]
Rider RPS |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2022-12 |
Approval Date | July 2023 |
Rate Year Beginning | 2023-09 |
Total Revenue Requirement (millions) | $ 96 | [1]
Increase (Decrease) Over Previous Year | $ (44) |
Rider RPS |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2023-12 | [7]
Approval Date | Pending |
Rate Year Beginning | 2024-09 |
Total Revenue Requirement (millions) | $ 358 | [1]
Increase (Decrease) Over Previous Year | $ 262 |
Rider S |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2021-06 |
Approval Date | February 2022 |
Rate Year Beginning | 2023-04 |
Total Revenue Requirement (millions) | $ 191 | [1],[5]
Increase (Decrease) Over Previous Year | $ (1) |
Rider SNA |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2022-10 | [8]
Approval Date | June 2023 | [8]
Rate Year Beginning | 2023-09 | [8]
Total Revenue Requirement (millions) | $ 50 | [1],[8]
Increase (Decrease) Over Previous Year | $ (57) | [8]
Rider SNA |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2023-10 |
Approval Date | Pending |
Rate Year Beginning | 2024-09 |
Total Revenue Requirement (millions) | $ 95 | [1]
Increase (Decrease) Over Previous Year | $ 45 |
Rider T1 |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2023-05 | [9]
Approval Date | July 2023 | [9]
Rate Year Beginning | 2023-09 | [9]
Total Revenue Requirement (millions) | $ 879 | [1],[9]
Increase (Decrease) Over Previous Year | $ 173 | [9]
Rider U |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2022-06 | [10]
Approval Date | February 2023 | [10]
Rate Year Beginning | 2023-04 | [10]
Total Revenue Requirement (millions) | $ 74 | [1],[10]
Increase (Decrease) Over Previous Year | $ (21) | [10]
Rider U |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2023-10 | [11]
Approval Date | Pending | [11]
Rate Year Beginning | 2024-08 | [11]
Total Revenue Requirement (millions) | $ 150 | [1],[11]
Increase (Decrease) Over Previous Year | $ 76 | [11]
Rider W |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2022-06 | [12]
Approval Date | February 2023 | [12]
Rate Year Beginning | 2023-04 | [12]
Total Revenue Requirement (millions) | $ 105 | [1],[5],[12]
Increase (Decrease) Over Previous Year | $ (16) | [12]
DSM Riders |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2022-12 | [13]
Approval Date | August 2023 | [13]
Rate Year Beginning | 2023-09 | [13]
Total Revenue Requirement (millions) | $ 107 | [1],[13]
Increase (Decrease) Over Previous Year | $ 16 | [13]
DSM Riders |  |
Public Utilities General Disclosures [Line Items] |  |
Application Date | 2023-12 | [14]
Approval Date | Pending | [14]
Rate Year Beginning | 2024-09 | [14]
Total Revenue Requirement (millions) | $ 93 | [1],[14]
Increase (Decrease) Over Previous Year | $ (14) | [14]
[1] | In addition, Virginia Power has various riders associated with other projects with an aggregate total annual revenue requirement of approximately $90 million as of December 31, 2023. There are various pending applications associated with such riders, which if approved, would result in a net increase of approximately $6 million.
[2] | Associated with solar generation and energy storage projects requested for approval in October 2022 and certain small-scale solar projects in addition to previously approved Rider CE projects.
[3] | Associated with five solar generation projects, one small-scale solar project and 13 power purchase agreements in addition to previously approved Rider CE projects.
[4] | The total revenue requi rement requested is based on an estimated retirement of Greensville County in 2058, consistent with the current estimated useful life of the facility. Virginia Power also provided an alternative approach based on an estimated retirement of Greensville County in 2045, which if this alternative had been utilized, would have resulted in a revenue requirement of $144 million and $148 million for rate years beginning April 2024 and April 2025, respectively.
[5] | In May 2023, Virginia Power filed a notification with the Virginia Commission to combine Riders R, S and W, which have an aggregate revenue requirement of $351 million, into base rates effective July 2023 in accordance with legislation enacted in Virginia in April 2023.
[6] | In December 2022, Virginia Power filed a petition to update and reinstate Rider RGGI to recover RGGI compliance costs incurred after July 2022 and those projected to occur through December 2023, with rate recovery from September 2023 through August 2024. For purposes of this proceeding, Virginia Power assumed that Virginia would withdraw from RGGI on December 31, 2023, and accordingly did not project any RGGI compliance costs to be incurred after that date.
[7] | Virginia Power amended its application in February 2024.
[8] | Virginia Power requested approval of cost recovery of approximately $1.2 billion through Rider SNA for the first phase of nuclear life extension program which includes investments through 2024. In July 2022, the Virginia Commission approved a stipulation proposed by Virginia Power, the Virginia Commission staff and certain interested parties recommending that costs incurred after February 2022 associated with the first phase of the nuclear life extension program for North Anna be deferred and requested for recovery in a subsequent Rider SNA filing.
[9] | Consists of $510 million for the transmission component of Virginia Power’s base rates and $369 million for Rider T1.
[10] | Consists of previously approved phases of Rider U. In August 2023, the Virginia Commission approved Virginia Power’s request to extend the rider for the rate year beginning April 2023 through June 2024.
[11] | Consists of $72 million for previously approved phases and $78 million for phase seven costs for Rider U. In connection with the October 2023 application, Virginia Power requests the Virginia Commission further extend existing rates for Rider U through July 2024.
[12] | In February 2023, the Virginia Commission also approved Virginia Power’s requested revenue requirement for the rate year beginning April 2024. However, as Virginia Power provided notification in May 2023 to combine Rider W into base rates as discussed above, Rider W ceased to be separately collected effective July 2023.
[13] | Associated with an additional four new energy efficiency programs, one new demand response program and four new program bundles with a $150 million cost cap, with the ability to exceed the cost cap by no more than 15%.
[14] | Associated with an additional three new energy efficiency programs and one new demand response program with a $102 million cost cap, with the ability to exceed the cost cap by no more than 15%.

X
- Definition Application date of public utilities transmission. + References No definition available. + Details
Name: | d_ApplicationDateOfPublicUtilitiesTransmission
Namespace Prefix: | d_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of the approval date of public utilities projects. + References No definition available. + Details
Name: | d_ApprovalDateOfPublicUtilitiesProjectsDescription
Namespace Prefix: | d_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Requested Rate, Amount + References No definition available. + Details
Name: | d_PublicUtilitiesRequestedRateAmount
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public utilities, start date of proposed rate in month and year. + References No definition available. + Details
Name: | d_PublicUtilitiesStartDateOfProposedRate
Namespace Prefix: | d_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of public utility's approved rate increase (decrease) by regulatory agency. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesApprovedRateIncreaseDecreaseAmount
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_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderCCRMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderCEMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RideCEOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderEMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderEOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderGTMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderGVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderGVOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderOSWMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderOSWOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderRMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderBWMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RidersRGGIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderRPSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderRPSOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderSNAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderSNAOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderT1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderUOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderWMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_DSMRidersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_DSMRidersOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |