Regulatory Matters - Schedule of Additional Significant Riders Associated with Virginia Power Projects (Detail) - Virginia Electric and Power Company - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||||||||||||||
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Mar. 31, 2025 |
Jun. 30, 2025 |
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Rider CCR | ||||||||||||||||
Public Utilities General Disclosures [Line Items] | ||||||||||||||||
Application Date | [1] | 2025-04 | ||||||||||||||
Approval Date | [1] | Pending | ||||||||||||||
Rate Year Beginning | [1] | 2026-01 | ||||||||||||||
Total Revenue Requirement (millions) | [1],[2] | $ 166 | ||||||||||||||
Increase (decrease) in revenue requirement | [1] | $ (63) | ||||||||||||||
Rider CE | ||||||||||||||||
Public Utilities General Disclosures [Line Items] | ||||||||||||||||
Application Date | [3] | 2024-10 | ||||||||||||||
Approval Date | [3] | April 2025 | ||||||||||||||
Rate Year Beginning | [3] | 2025-05 | ||||||||||||||
Total Revenue Requirement (millions) | [2],[3] | $ 182 | ||||||||||||||
Increase (decrease) in revenue requirement | [3] | $ 49 | ||||||||||||||
Rider DIST | ||||||||||||||||
Public Utilities General Disclosures [Line Items] | ||||||||||||||||
Application Date | [4] | 2024-08 | ||||||||||||||
Approval Date | [4] | May 2025 | ||||||||||||||
Rate Year Beginning | [4] | 2025-06 | ||||||||||||||
Total Revenue Requirement (millions) | [2],[4] | $ 267 | ||||||||||||||
Rider GEN | ||||||||||||||||
Public Utilities General Disclosures [Line Items] | ||||||||||||||||
Application Date | [5] | 2024-06 | ||||||||||||||
Approval Date | [5] | February 2025 | ||||||||||||||
Rate Year Beginning | [5] | 2025-04 | ||||||||||||||
Total Revenue Requirement (millions) | [2],[5] | $ 438 | ||||||||||||||
Rider GEN One | ||||||||||||||||
Public Utilities General Disclosures [Line Items] | ||||||||||||||||
Application Date | 2024-06 | |||||||||||||||
Approval Date | February 2025 | |||||||||||||||
Rate Year Beginning | 2026-04 | |||||||||||||||
Total Revenue Requirement (millions) | [2] | $ 311 | ||||||||||||||
Increase (decrease) in revenue requirement | $ (127) | |||||||||||||||
Rider SNA | ||||||||||||||||
Public Utilities General Disclosures [Line Items] | ||||||||||||||||
Application Date | [6] | 2024-10 | ||||||||||||||
Approval Date | [6] | July 2025 | ||||||||||||||
Rate Year Beginning | [6] | 2025-09 | ||||||||||||||
Total Revenue Requirement (millions) | [2],[6] | $ 207 | ||||||||||||||
Increase (decrease) in revenue requirement | [6] | $ 138 | ||||||||||||||
Rider T1 | ||||||||||||||||
Public Utilities General Disclosures [Line Items] | ||||||||||||||||
Application Date | [7] | 2025-05 | ||||||||||||||
Rate Year Beginning | [7] | 2025-09 | ||||||||||||||
Total Revenue Requirement (millions) | [2],[7] | $ 1,343 | ||||||||||||||
Increase (decrease) in revenue requirement | [7] | $ 173 | ||||||||||||||
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