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Regulatory Matters - Summary of Virginia Power Electric Transmission Project Applied (Detail) - Virginia Electric and Power Company $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) mi kV
Elmont-Ladysmith rebuild and related projects in the Counties of Hanover and Caroline, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2021-04
Approval Date | 2022-04
Type of Line | kV | 500
Miles of Lines | mi | 26
Cost Estimate | $ | $ 95
Rebuild transmission lines and related projects in the City of Staunton and County of Augusta, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2021-11
Approval Date | 2022-08
Type of Line | kV | 230
Miles of Lines | mi | 21
Cost Estimate | $ | $ 45
Build new Dulles Towne Center substation and line loop in the County of Loudoun, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2021-12
Approval Date | 2022-07
Type of Line | kV | 230
Miles of Lines | mi | 1
Cost Estimate | $ | $ 105
Build new Aviator substation and line loop in the County of Loudoun, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-02
Approval Date | 2022-11
Type of Line | kV | 230
Miles of Lines | mi | 1
Cost Estimate | $ | $ 80
Nimbus line loop and substation and new 230 kV line in the County of Loudon, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-02
Approval Date | 2022-10
Type of Line | kV | 230
Miles of Lines | mi | 1
Cost Estimate | $ | $ 40
Partial rebuild of Bristers-Ox 115 kV line in Fauquier and Prince William Counties, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-08
Type of Line | kV | 115
Miles of Lines | mi | 15
Cost Estimate | $ | $ 40
Construct new switching station, substations, transmission lines and related projects in Lunenberg and Mecklenburg Counties Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-10
Type of Line | kV | 230
Miles of Lines | mi | 18
Cost Estimate | $ | $ 230
Construct new switching station, substation, transmission lines and related projects in Charlotte, Halifax and Mecklenburg Counties, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-10
Type of Line | kV | 230
Miles of Lines | mi | 26
Cost Estimate | $ | $ 215
Construct new Mars and Wishing Star substations, transmission lines and related projects in Loudoun County, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-10
Type of Line | 500/230 kV
Miles of Lines | mi | 4
Cost Estimate | $ | $ 720
Construct new Altair switching station, transmission lines and related projects in Loudoun County, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-11
Type of Line | 230 kV
Miles of Lines | mi | 2
Cost Estimate | $ | $ 50
Construct new Cirrus and Keyser switching stations, transmission lines and related projects in Culpeper, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2022-11
Type of Line | 230 kV
Miles of Lines | mi | 5
Cost Estimate | $ | $ 65

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