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Regulatory Matters - Schedule of Additional Significant Riders Associated with Virginia Power Projects (Detail) - Virginia Electric and Power Company $ in Millions | 9 Months Ended
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Sep. 30, 2020 USD ($)
Rider US-3 |
Public Utilities General Disclosures [Line Items] |
Application Date | 2019-07
Approval Date | March 2020
Rate Year Beginning | 2020-06
Total Revenue Requirement (millions) | $ 28
Increase (decrease) in revenue requirement | $ 18
Rider BW |
Public Utilities General Disclosures [Line Items] |
Application Date | 2019-10
Approval Date | June 2020
Rate Year Beginning | 2020-09
Total Revenue Requirement (millions) | $ 99
Increase (decrease) in revenue requirement | $ (20)
Rider B |
Public Utilities General Disclosures [Line Items] |
Application Date | 2020-06
Approval Date | Pending
Rate Year Beginning | 2021-04
Total Revenue Requirement (millions) | $ 24
Increase (decrease) in revenue requirement | $ (8)
Rider GV |
Public Utilities General Disclosures [Line Items] |
Application Date | 2020-06
Approval Date | Pending
Rate Year Beginning | 2021-04
Total Revenue Requirement (millions) | $ 154
Increase (decrease) in revenue requirement | $ 22
Rider US-2 |
Public Utilities General Disclosures [Line Items] |
Application Date | 2019-10
Approval Date | July 2020
Rate Year Beginning | 2020-09
Total Revenue Requirement (millions) | $ 10
Increase (decrease) in revenue requirement | $ (5)
Rider R |
Public Utilities General Disclosures [Line Items] |
Application Date | 2020-06
Approval Date | Pending
Rate Year Beginning | 2021-04
Total Revenue Requirement (millions) | $ 59
Increase (decrease) in revenue requirement | $ 15
Rider E |
Public Utilities General Disclosures [Line Items] |
Application Date | 2020-01
Approval Date | September 2020
Rate Year Beginning | 2020-11
Total Revenue Requirement (millions) | $ 85
Increase (decrease) in revenue requirement | $ (19)
Rider S |
Public Utilities General Disclosures [Line Items] |
Application Date | 2020-06
Approval Date | Pending
Rate Year Beginning | 2021-04
Total Revenue Requirement (millions) | $ 194
Increase (decrease) in revenue requirement | $ (1)
Rider W |
Public Utilities General Disclosures [Line Items] |
Application Date | 2020-06
Approval Date | Pending
Rate Year Beginning | 2021-04
Total Revenue Requirement (millions) | $ 120
Increase (decrease) in revenue requirement | $ 14
Rider US-3 |
Public Utilities General Disclosures [Line Items] |
Application Date | 2020-07
Approval Date | Pending
Rate Year Beginning | 2021-06
Total Revenue Requirement (millions) | $ 39
Increase (decrease) in revenue requirement | $ 10
Rider US-4 |
Public Utilities General Disclosures [Line Items] |
Application Date | 2020-07
Approval Date | Pending
Rate Year Beginning | 2021-06
Total Revenue Requirement (millions) | $ 12
Increase (decrease) in revenue requirement | $ 4
Rider BW |
Public Utilities General Disclosures [Line Items] |
Application Date | 2020-10
Approval Date | Pending
Rate Year Beginning | 2021-09
Total Revenue Requirement (millions) | $ 113
Increase (decrease) in revenue requirement | $ 14
Rider US-2 |
Public Utilities General Disclosures [Line Items] |
Application Date | 2020-10
Approval Date | Pending
Rate Year Beginning | 2021-09
Total Revenue Requirement (millions) | $ 10
Increase (decrease) in revenue requirement | $ 0

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