v3.26.1
Regulatory Matters - Summary of Virginia Power Electric Transmission Project Applied (Detail) - Virginia Electric and Power Company
$ in Millions
 6 Months Ended
Jun. 30, 2026
USD ($)
mi
Construct New Culpeper Technology Transmission Lines, Substations and Related Projects in the Counties of Culpeper, Orange and Fauquier and the Town of Culpeper, Virginia  
Public Utilities General Disclosures [Line Items]  
Application Date 2025-02
Approval Date 2026-03
Type of Line 230 kV
Miles of Lines | mi 13
Cost Estimate | $ $ 255 [1]
Construct new Golden-Mars transmission lines and related projects in Loudoun County, Virginia  
Public Utilities General Disclosures [Line Items]  
Application Date 2025-03
Approval Date 2026-06 [2]
Type of Line 500-230 kV
Miles of Lines | mi 11
Cost Estimate | $ $ 515 [1]
Partial rebuild Chesterfield-Lanexa transmission lines in the Counties of Henrico, Charles City and New Kent, Virginia  
Public Utilities General Disclosures [Line Items]  
Application Date 2025-09
Approval Date 2026-03
Type of Line 230-115 kV
Miles of Lines | mi 58
Cost Estimate | $ $ 150 [1]
Construct Morrisville-Wishing Star transmission lines and related projects in the Counties of Fauquier, Prince William and Loudoun, Virginia  
Public Utilities General Disclosures [Line Items]  
Application Date 2026-02
Type of Line 500-230 kV
Miles of Lines | mi 45
Cost Estimate | $ $ 875 [1]
Rebuild Charlottesville-Gordonsville transmission lines and related projects in the County of Albermarle and the City of Charlottesville, Virginia  
Public Utilities General Disclosures [Line Items]  
Application Date 2026-04
Type of Line 230 kV
Miles of Lines | mi 16
Cost Estimate | $ $ 100 [1]
Construct Firehouse transmission lines, substation and related projects in County of Loudoun, Virginia  
Public Utilities General Disclosures [Line Items]  
Application Date 2026-05
Type of Line 230 kV
Miles of Lines | mi 1
Cost Estimate | $ $ 65 [1]
Construct Aspen-Doubs and Goose Creek-Woodside transmission lines, rebuild Doubs-Goose Creek transmission line and related projects in County of Loudoun, Virginia  
Public Utilities General Disclosures [Line Items]  
Application Date 2026-05
Type of Line 500 kV
Miles of Lines | mi 9
Cost Estimate | $ $ 200 [1]
Construct new Allman Station switching station and related projects in the City of Fredericksburg, Virginia  
Public Utilities General Disclosures [Line Items]  
Application Date 2026-05
Type of Line 230 kV
Miles of Lines | mi 1
Cost Estimate | $ $ 100 [1]
Install underbuilt transmission lines on existing 500 kV Elmont-Ladysmith line support structures and related projects in the Counties of Hanover and Caroline, Virginia  
Public Utilities General Disclosures [Line Items]  
Application Date 2026-06
Type of Line 230 kV
Miles of Lines | mi 26
Cost Estimate | $ $ 60 [1]
[1] Represents the cost estimate included in the application except as updated in the approval if applicable. In addition, Virginia Power had one other transmission project applied for and currently pending approval with an aggregate cost estimate of approximately $20 million.
[2] In July 2026, appeals were filed with the Supreme Court of Virginia. This matter is pending.