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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, 2020 USD ($) kV mi
Rebuild and operate five segments between the Loudoun and Ox substations |
Public Utilities General Disclosures [Line Items] |
Application Date | 2019-08
Approval Date | 2020-06
Capacity of transmission line (kV) | kV | 230
Length of kV line (miles) | mi | 19
The total estimated capital investment | $ | $ 70
Build new Lockridge substation and line loop in Loudoun County, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2019-12
Approval Date | 2020-10
Capacity of transmission line (kV) | kV | 230
The total estimated capital investment | $ | $ 35
Bristers-Ladysmith Rebuild Project in the counties of Fauquier, Stafford, Spotsylvania, and Caroline, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2020-05
Approval Date | 2021-02
Capacity of transmission line (kV) | kV | 500
Length of kV line (miles) | mi | 37
The total estimated capital investment | $ | $ 110
Relocate and replace a transmission line underground between the Tysons substation and the future Spring Hill substation |
Public Utilities General Disclosures [Line Items] |
Application Date | 2020-09
Capacity of transmission line (kV) | kV | 230
The total estimated capital investment | $ | $ 30
Approval Date | Pending
Rebuild an Existing Transmission Line and Install New Line Adjacent thereto in Counties of New Kent, King William, King and Queen Essex and Richmond, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2020-10
Capacity of transmission line (kV) | kV | 230
Length of kV line (miles) | mi | 41
The total estimated capital investment | $ | $ 100
Approval Date | Pending
Rebuild Clubhouse - Dry Bread Line and Dry Bread Lakeview Line in Greensville County, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2020-11
Capacity of transmission line (kV) | kV | 230
Length of kV line (miles) | mi | 13
The total estimated capital investment | $ | $ 20
Approval Date | Pending
Rebuild transmission lines and related projects in the Counties of York and James City and the City of Williamsburg, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2021-01
Capacity of transmission line (kV) | kV | 230
Length of kV line (miles) | mi | 11
The total estimated capital investment | $ | $ 30
Approval Date | Pending

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