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Regulatory Matters - Summary of Additional Significant Riders Associated with Various Virginia Power Projects (Detail) - Virginia Electric and Power Company $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($)
Rider S |
Public Utilities, General Disclosures [Line Items] |
Application Date | 2018-06
Approval Date | February 2019
Rate Year Beginning | 2019-04
Total Revenue Requirement (millions) | $ 215
Increase (decrease) in revenue requirement | $ (3)
Rider GV |
Public Utilities, General Disclosures [Line Items] |
Application Date | 2018-06
Approval Date | February 2019
Rate Year Beginning | 2019-04
Total Revenue Requirement (millions) | $ 120
Increase (decrease) in revenue requirement | $ 38
Rider W |
Public Utilities, General Disclosures [Line Items] |
Application Date | 2018-06
Approval Date | February 2019
Rate Year Beginning | 2019-04
Total Revenue Requirement (millions) | $ 105
Increase (decrease) in revenue requirement | $ (4)
Rider R |
Public Utilities, General Disclosures [Line Items] |
Application Date | 2018-06
Approval Date | February 2019
Rate Year Beginning | 2019-04
Total Revenue Requirement (millions) | $ 57
Increase (decrease) in revenue requirement | $ (9)
Rider B |
Public Utilities, General Disclosures [Line Items] |
Application Date | 2018-06
Approval Date | February 2019
Rate Year Beginning | 2019-04
Total Revenue Requirement (millions) | $ 38
Increase (decrease) in revenue requirement | $ (9)
Rider BW |
Public Utilities, General Disclosures [Line Items] |
Application Date | 2018-10
Approval Date | Pending
Rate Year Beginning | 2019-09
Total Revenue Requirement (millions) | $ 123
Increase (decrease) in revenue requirement | $ 7
Rider US2 |
Public Utilities, General Disclosures [Line Items] |
Application Date | 2018-10
Approval Date | Pending
Rate Year Beginning | 2019-09
Total Revenue Requirement (millions) | $ 16
Increase (decrease) in revenue requirement | $ 3
Rider E |
Public Utilities, General Disclosures [Line Items] |
Application Date | 2018-12
Approval Date | Pending
Rate Year Beginning | 2019-11
Total Revenue Requirement (millions) | $ 114

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