v3.25.2
Regulatory Matters - Schedule of Additional Significant Riders Associated with Virginia Power Projects (Parenthetical) (Detail)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 31, 2025
USD ($)
Jun. 30, 2025
USD ($)
Project
Agreement
Virginia Electric and Power Company    
Public Utilities, General Disclosures [Line Items]    
Additional total revenue requirement   $ 42
Public utilities requested rate increase annual revenue of pending applications approval   $ 36
Rider CE    
Public Utilities, General Disclosures [Line Items]    
Public utilities number of small scale solar project | Agreement   2
Public utilities number of power purchase agreements | Agreement   19
Rider CE | Virginia Electric and Power Company    
Public Utilities, General Disclosures [Line Items]    
Total revenue requirement [1],[2]   $ 182
Public utilities number of solar generation projects | Project   2
Consolidation of Riders BW, GV and Four Other Riders | Virginia Electric and Power Company    
Public Utilities, General Disclosures [Line Items]    
Total revenue requirement $ 348  
Electric Distribution Grid Transformation Projects | Virginia Electric and Power Company    
Public Utilities, General Disclosures [Line Items]    
Total revenue requirement   $ 100
Underground Distribution Facilities | Virginia Electric and Power Company    
Public Utilities, General Disclosures [Line Items]    
Total revenue requirement   167
Rider T1 | Virginia Electric and Power Company    
Public Utilities, General Disclosures [Line Items]    
Total revenue requirement [2],[3]   1,343
Rider T1 | Virginia Electric and Power Company | Operating Segments | Virginia Regulation    
Public Utilities, General Disclosures [Line Items]    
Total revenue requirement   782
Rider T1 | Virginia Electric and Power Company | Operating Segments | Transmission Component Of Virginia Powers | Virginia Regulation    
Public Utilities, General Disclosures [Line Items]    
Total revenue requirement   561
Rider SNA | Virginia Electric and Power Company    
Public Utilities, General Disclosures [Line Items]    
Total revenue requirement [2],[4]   207
Rider SNA | Virginia Electric and Power Company | Operating Segments | Second Phase Of Nuclear Life Extension Program | Virginia Regulation    
Public Utilities, General Disclosures [Line Items]    
Projected capital investment   $ 1,700
[1] Associated with two solar generation projects, two small-scale solar projects and 19 purchased power agreements in addition to previously approved Rider CE projects.
[2] In addition, Virginia Power has riders associated with other projects with a total annual revenue requirement of $42 million and a pending application associated with the Chesterfield Energy Reliability Center described above, which if approved would result in a net annual revenue requirement increase of $36 million.
[3] Consists of $561 million for the transmission component of Virginia Power’s base rates and $782 million for Rider T1.
[4] The Virginia Commission also approved Virginia Power’s request for cost recovery of approximately $1.7 billion through Rider SNA for the second phase of the nuclear life extension program which includes investments for calendar years 2025 through 2027.