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Regulatory Matters - Summary of Additional Virginia Power Electric Transmission Projects Approved and Applied (Detail) - Virginia Electric and Power Company - Virginia Regulation $ in Millions | 3 Months Ended
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Mar. 31, 2019 USD ($) kV mi
Partial Rebuild of Overhead Transmission Lines in Alleghany County, Virginia and Covington, Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2018-08
Approval Date | 2019-04
Type of Line | kV | 138
Miles of Lines | mi | 5
Cost Estimate (millions) | $ | $ 15
Rebuild and Operate Between Lanexa and Northern Neck in Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2018-06
Approval Date | 2019-02
Type of Line | kV | 230
Miles of Lines | mi | 3
Cost Estimate (millions) | $ | $ 30
Rebuild and Operate Glebe Substation and Relocate and Operate in Arlington County, Virginia and City of Alexandria, Virginia Existing Overhead Line Underground |
Public Utilities General Disclosures [Line Items] |
Application Date | 2019-03
Type of Line | kV | 230
Cost Estimate (millions) | $ | $ 125
Rebuild and Operate Glebe Substation and Relocate and Operate in Arlington County, Virginia and City of Alexandria, Virginia Existing Overhead Line Underground | Maximum [Member] |
Public Utilities General Disclosures [Line Items] |
Miles of Lines | mi | 1
Rebuild and Operate Between Valley, Virginia and Mt. Storm, West Virginia |
Public Utilities General Disclosures [Line Items] |
Application Date | 2019-04
Type of Line | kV | 500
Miles of Lines | mi | 65
Cost Estimate (millions) | $ | $ 290

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