v3.25.2
Property, Plant and Equipment (Narrative) (Detail)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
MVA
Property, Plant and Equipment [Line Items]          
Noncontrolling Interests $ 54 [1] $ 0 $ 100 [2] $ 0  
Income tax expense (benefit) 220 [3] 112 [3] 260 [4] 208 [4]  
Impairment of assets and other charges 50 67 96 97  
Corporate Office Building | Level 3          
Property, Plant and Equipment [Line Items]          
Long-lived assets, estimated fair value   23   23  
Corporate Office Building | Impairment of Assets and Other Charges          
Property, Plant and Equipment [Line Items]          
Impairment of assets and other charges   17      
Asset impairment charges after tax   12      
Nonregulated renewable natural gas facilities | Minimum | Level 3          
Property, Plant and Equipment [Line Items]          
Long-lived assets, estimated fair value   1   1  
Nonregulated renewable natural gas facilities | Impairment of Assets and Other Charges          
Property, Plant and Equipment [Line Items]          
Impairment of assets and other charges   33      
Asset impairment charges after tax   25      
Virginia Electric and Power Company          
Property, Plant and Equipment [Line Items]          
Noncontrolling Interests 54 [5] 0 100 [6] 0  
Income tax expense (benefit) 115 [7] $ 120 [7] 205 [8] $ 253 [8]  
Virginia Electric and Power Company | CVOW Commercial Project          
Property, Plant and Equipment [Line Items]          
Charge for costs not expected to be recovered 51   96    
Noncontrolling Interests $ 26   $ 48    
Percentage of remaining construction costs, including contingency 7.00%   7.00%    
Income tax expense (benefit) $ 6   $ 12    
Ownership percentage         50.00%
Virginia Electric and Power Company | CVOW Commercial Project | End of 2026          
Property, Plant and Equipment [Line Items]          
Targeted capacity provided by legislation | MVA         2.6
Anticipated projected cost         $ 10,900
Virginia Electric and Power Company | CVOW Commercial Project | End of 2026 | Maximum          
Property, Plant and Equipment [Line Items]          
Anticipated projected cost 300   300    
Virginia Electric and Power Company | CVOW Commercial Project | Trade Agreement Announced in July 2025 | Maximum          
Property, Plant and Equipment [Line Items]          
Anticipated projected cost 100   100    
Virginia Electric and Power Company | CVOW Commercial Project | May 2025 Construction Update Filing          
Property, Plant and Equipment [Line Items]          
Anticipated projected cost 100   100    
Virginia Electric and Power Company | CVOW Commercial Project | February 2025 Construction Update Filing          
Property, Plant and Equipment [Line Items]          
Anticipated projected cost $ 200   $ 200    
[1] Items designated are other segment items for each reportable segment.
[2] Items designated are other segment items for each reportable segment.
[3] The significant expense categories and amounts in the segment information presented above align with the segment-level information that is regularly provided to Dominion Energy’s CODM.
[4] The significant expense categories and amounts in the segment information presented above align with the segment-level information that is regularly provided to Dominion Energy’s CODM.
[5] Items designated are other segment items for each reportable segment.
[6] Items designated are other segment items for each reportable segment.
[7] The significant expense categories and amounts in the segment information presented above align with the segment-level information that is regularly provided to Virginia Power’s CODM.
[8] The significant expense categories and amounts in the segment information presented above align with the segment-level information that is regularly provided to Virginia Power’s CODM.