v3.26.3
Operating Segments (Schedule of Segment Reporting Information, by Segment, Virginia Power) (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Segment Reporting Information [Line Items]          
Operating Revenue $ 5,617 $ 4,527 $ 15,116 $ 12,413  
Electric fuel and other energy-related purchases 1,603 [1] 1,337 [1] 4,524 [2] 3,245 [2]  
Purchased electric capacity 106 [1] 36 [1] 255 [2] 63 [2]  
Other operations and maintenance 1,089 [1],[3] 980 [1],[3] 3,917 [2],[4] 2,857 [2],[4]  
Depreciation and amortization 722 [1] 609 [1] 1,968 [2] 1,771 [2]  
Other taxes 215 [1] 195 [1] 653 [2] 598 [2]  
Total operating expenses 3,775 3,188 11,553 8,755  
Interest and related charges 623 [1] 527 [1] 1,739 [2] 1,513 [2]  
Income tax expense (benefit) 215 [1] 216 [1] 385 [2],[5] 476 [2]  
Other income (expense) 229 [6] 406 [6] 840 [7] 792 [7]  
Interest income 40 [6] 26 [6] 110 [7] 100 [7]  
Noncontrolling Interests 114 [6] 22 [6] 267 [7] 122 [7]  
Net Income 1,160 1,006 2,121 2,431  
Total assets 124,784   124,784   $ 115,857 [8]
Virginia Electric and Power Company          
Segment Reporting Information [Line Items]          
Operating Revenue [9] 4,218 3,311 11,335 8,788  
Electric fuel and other energy-related purchases [9] 1,296 [10] 1,071 [10] 3,739 [11] 2,569 [11]  
Purchased electric capacity 103 [10] 32 [10] 246 [11] 56 [11]  
Other operations and maintenance 747 [10],[12] 706 [10],[12] 2,196 [11],[13] 1,965 [11],[13]  
Depreciation and amortization 509 [10] 418 [10] 1,347 [11] 1,212 [11]  
Other taxes 104 [10] 93 [10] 309 [11] 282 [11]  
Total operating expenses 2,759 2,320 7,837 6,084  
Interest and related charges [9] 312 [10] 235 [10] 833 [11] 729 [11]  
Income tax expense (benefit) 220 [10] 151 [10] 519 [5],[11] 356 [11]  
Other income (expense) 57 [14] 79 [14] 201 [15] 173 [15]  
Interest income 10 [14] 6 [14] 20 [15] 18 [15]  
Noncontrolling Interests 114 [14] 22 [14] 267 [15] 122 [15]  
Net Income 880 668 2,100 1,688  
Capital expenditures     7,162 7,690  
Total assets 86,808   86,808   $ 79,243 [16]
Virginia Electric and Power Company | Dominion Energy Virginia          
Segment Reporting Information [Line Items]          
Operating Revenue 4,218 3,311 11,405 8,817  
Electric fuel and other energy-related purchases 1,296 [10] 1,071 [10] 3,732 [11] 2,569 [11]  
Purchased electric capacity 103 [10] 32 [10] 246 [11] 56 [11]  
Other operations and maintenance 745 [10],[12] 581 [10],[12] 2,002 [11],[13] 1,671 [11],[13]  
Depreciation and amortization 509 [10] 415 [10] 1,347 [11] 1,208 [11]  
Other taxes 104 [10] 92 [10] 309 [11] 281 [11]  
Total operating expenses 2,757 2,191 7,636 5,785  
Interest and related charges 311 [10] 236 [10] 832 [11] 733 [11]  
Income tax expense (benefit) 232 [10] 169 [10] 562 [11] 412 [11]  
Other income (expense) 48 [14] 45 [14] 138 [15] 119 [15]  
Interest income 10 [14] 5 [14] 20 [15] 17 [15]  
Noncontrolling Interests 114 [14] 86 [14] 331 [15] 234 [15]  
Net Income 862 679 2,202 1,789  
Capital expenditures     7,162 7,690  
Total assets 86,800   86,800    
Virginia Electric and Power Company | Corporate and Other          
Segment Reporting Information [Line Items]          
Operating Revenue 0 0 (70) (29)  
Electric fuel and other energy-related purchases 0 [10] 0 [10] 7 [11] 0 [11]  
Purchased electric capacity 0 [10] 0 [10] 0 [11] 0 [11]  
Other operations and maintenance 2 [10],[12] 125 [10],[12] 194 [11],[13] 294 [11],[13]  
Depreciation and amortization 0 [10] 3 [10] 0 [11] 4 [11]  
Other taxes 0 [10] 1 [10] 0 [11] 1 [11]  
Total operating expenses 2 129 201 299  
Interest and related charges 1 [10] (1) [10] 1 [11] (4) [11]  
Income tax expense (benefit) (12) [10] (18) [10] (43) [11] (56) [11]  
Other income (expense) 9 [14] 34 [14] 63 [15] 54 [15]  
Interest income 0 [14] 1 [14] 0 [15] 1 [15]  
Noncontrolling Interests 0 [14] (64) [14] (64) [15] (112) [15]  
Net Income 18 $ (11) (102) (101)  
Capital expenditures     0 $ 0  
Total assets $ 0   $ 0    
[1] 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.
[2] 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.
[3] Includes impairment of assets and other charges (benefits).
[4] Includes impairment of assets and other charges (benefits).
[5] The Companies had no adjustments related to the following disclosure categories: foreign tax effects, effects of changes in tax law or rates enacted in the current period and effects of cross-border tax laws.
[6] Items designated are other segment items for each reportable segment.
[7] Items designated are other segment items for each reportable segment.
[8] Dominion Energy’s Consolidated Balance Sheet at December 31, 2025 has been derived from the audited Consolidated Balance Sheet at that date.
[9] See Note 18 for amounts attributable to affiliates.
[10] 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.
[11] 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.
[12] Includes impairment of assets and other charges (benefits).
[13] Includes impairment of assets and other charges (benefits).
[14] Items designated are other segment items for each reportable segment.
[15] Items designated are other segment items for each reportable segment.
[16] Virginia Power’s Consolidated Balance Sheet at December 31, 2025 has been derived from the audited Consolidated Balance Sheet at that date.