v3.25.2
Operating Segments (Schedule of Segment Reporting Information, by Segment) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
 [9]
Segment Reporting Information [Line Items]          
Operating Revenue $ 3,810 $ 3,486 $ 7,886 $ 7,118  
Electric fuel and other energy-related purchases 946 [1] 918 [1] 1,908 [2] 1,877 [2]  
Purchased electric capacity 18 [1] 21 [1] 27 [2] 33 [2]  
Purchased gas 43 [1] 44 [1] 190 [2] 164 [2]  
Other operations and maintenance 933 [1],[3] 907 [1],[3] 1,877 [2],[4] 1,792 [2],[4]  
Depreciation and amortization 580 [1] 621 [1] 1,162 [2] 1,242 [2]  
Other taxes 194 [1] 170 [1] 403 [2] 372 [2]  
Total operating expenses 2,714 2,681 5,567 5,480  
Interest and related charges 505 [1] 470 [1] 986 [2] 1,045 [2]  
Income tax expense (benefit) 220 [1] 112 [1] 260 [2] 208 [2]  
Equity in earnings (losses) of equity method investees (1) [5] (1) [5] (8) [6] (1) [6]  
Other income (expense) 409 [5] 230 [5] 386 [6] 296 [6]  
Interest income 34 [5] 14 [5] 74 [6] 71 [6]  
Net Income From Discontinued Operations Including Noncontrolling Interests [7] 1 97 0 215  
Noncontrolling Interests 54 [5] 0 100 [6] 0  
Net income (loss) attributable to Dominion Energy 760 563 1,425 966  
Investment in equity method investees 139 [8]   139 [8]   $ 138
Capital expenditures     6,226 5,921  
Total assets 107,441   107,441   $ 102,415
Operating Segments          
Segment Reporting Information [Line Items]          
Total revenue from external customers 3,810 3,486 7,886 7,118  
Adjustments & Eliminations          
Segment Reporting Information [Line Items]          
Operating Revenue (302) (264) (616) (501)  
Electric fuel and other energy-related purchases (3) [1] (3) [1] (6) [2] (4) [2]  
Purchased electric capacity (1) [1] (1) [1] (1) [2] (1) [2]  
Purchased gas 0 [1] 0 [1] 0 [2] 0 [2]  
Other operations and maintenance (295) [1],[3] (258) [1],[3] (603) [2],[4] (492) [2],[4]  
Depreciation and amortization 0 [1] 0 [1] 0 [2] 0 [2]  
Other taxes (3) [1] (2) [1] (6) [2] (4) [2]  
Total operating expenses (302) (264) (616) (501)  
Interest and related charges (63) [1] (44) [1] (112) [2] (80) [2]  
Income tax expense (benefit) 0 [1] 0 [1] 0 [2] 0 [2]  
Equity in earnings (losses) of equity method investees 0 [5] 0 [5] 0 [6] 0 [6]  
Other income (expense) 0 [5] 0 [5] 0 [6] 0 [6]  
Interest income (63) [5] (44) [5] (112) [6] (80) [6]  
Net Income From Discontinued Operations Including Noncontrolling Interests 0 0 0 0  
Noncontrolling Interests 0 [5]   0 [6]    
Net income (loss) attributable to Dominion Energy 0 0 0 0  
Investment in equity method investees [8] 0   0    
Capital expenditures     0 0  
Total assets (5,000)   (5,000)    
Intersegment revenue          
Segment Reporting Information [Line Items]          
Operating Revenue 0 0 0 0  
Adjustments & Eliminations          
Segment Reporting Information [Line Items]          
Operating Revenue (302) (264) (616) (501)  
Eliminations          
Segment Reporting Information [Line Items]          
Total revenue from external customers 0 0 0 0  
Dominion Energy Virginia | Operating Segments          
Segment Reporting Information [Line Items]          
Total revenue from external customers 2,710 2,537 5,505 5,026  
Operating Revenue 2,712 2,537 5,506 5,026  
Electric fuel and other energy-related purchases 729 [1] 707 [1] 1,498 [2] 1,408 [2]  
Purchased electric capacity 17 [1] 16 [1] 24 [2] 29 [2]  
Purchased gas 0 [1] 0 [1] 0 [2] 0 [2]  
Other operations and maintenance 531 [1],[3] 522 [1],[3] 1,090 [2],[4] 1,055 [2],[4]  
Depreciation and amortization 396 [1] 444 [1] 793 [2] 889 [2]  
Other taxes 92 [1] 71 [1] 189 [2] 164 [2]  
Total operating expenses 1,765 1,760 3,594 3,545  
Interest and related charges 252 [1] 206 [1] 497 [2] 398 [2]  
Income tax expense (benefit) 110 [1] 117 [1] 243 [2] 234 [2]  
Equity in earnings (losses) of equity method investees 0 [5] 0 [5] 0 [6] 0 [6]  
Other income (expense) 39 [5] 29 [5] 74 [6] 50 [6]  
Interest income 5 [5] 2 [5] 12 [6] 10 [6]  
Net Income From Discontinued Operations Including Noncontrolling Interests 0 0 0 0  
Noncontrolling Interests 80 [5]   148 [6]    
Net income (loss) attributable to Dominion Energy 549 485 1,110 909  
Investment in equity method investees [8] 0   0    
Capital expenditures     5,233 4,572  
Total assets 74,600   74,600    
Dominion Energy Virginia | Intersegment revenue          
Segment Reporting Information [Line Items]          
Operating Revenue 2 0 1 0  
Dominion Energy South Carolina | Operating Segments          
Segment Reporting Information [Line Items]          
Total revenue from external customers 833 758 1,782 1,650  
Operating Revenue 836 762 1,787 1,655  
Electric fuel and other energy-related purchases 199 [1] 186 [1] 366 [2] 419 [2]  
Purchased electric capacity 2 [1] 5 [1] 4 [2] 4 [2]  
Purchased gas 43 [1] 44 [1] 190 [2] 164 [2]  
Other operations and maintenance 170 [1],[3] 170 [1],[3] 348 [2],[4] 336 [2],[4]  
Depreciation and amortization 141 [1] 136 [1] 282 [2] 272 [2]  
Other taxes 75 [1] 74 [1] 154 [2] 149 [2]  
Total operating expenses 630 615 1,344 1,344  
Interest and related charges 70 [1] 66 [1] 141 [2] 133 [2]  
Income tax expense (benefit) 29 [1] 14 [1] 47 [2] 32 [2]  
Equity in earnings (losses) of equity method investees 0 [5] 0 [5] 0 [6] 0 [6]  
Other income (expense) 0 [5] 1 [5] 0 [6] 0 [6]  
Interest income 2 [5] 1 [5] 6 [6] 3 [6]  
Net Income From Discontinued Operations Including Noncontrolling Interests 0 0 0 0  
Noncontrolling Interests 0 [5]   0 [6]    
Net income (loss) attributable to Dominion Energy 109 69 261 149  
Investment in equity method investees [8] 0   0    
Capital expenditures     561 489  
Total assets 18,700   18,700    
Dominion Energy South Carolina | Intersegment revenue          
Segment Reporting Information [Line Items]          
Operating Revenue 3 4 5 5  
Contracted Energy | Operating Segments          
Segment Reporting Information [Line Items]          
Total revenue from external customers 240 281 544 587  
Operating Revenue 245 284 552 592  
Electric fuel and other energy-related purchases 21 [1] 28 [1] 50 [2] 54 [2]  
Purchased electric capacity 0 [1] 0 [1] 0 [2] 0 [2]  
Purchased gas 0 [1] 0 [1] 0 [2] 0 [2]  
Other operations and maintenance 164 [1],[3] 108 [1],[3] 275 [2],[4] 212 [2],[4]  
Depreciation and amortization 22 [1] 19 [1] 44 [2] 37 [2]  
Other taxes 15 [1] 13 [1] 30 [2] 27 [2]  
Total operating expenses 222 168 399 330  
Interest and related charges 8 [1] 11 [1] 16 [2] 20 [2]  
Income tax expense (benefit) (1) [1] 34 [1] 40 [2] 75 [2]  
Equity in earnings (losses) of equity method investees (1) [5] (1) [5] (1) [6] (1) [6]  
Other income (expense) (1) [5] 14 [5] (8) [6] (7) [6]  
Interest income 35 [5] 16 [5] 68 [6] 63 [6]  
Net Income From Discontinued Operations Including Noncontrolling Interests 0 0 0 0  
Noncontrolling Interests 0 [5]   0 [6]    
Net income (loss) attributable to Dominion Energy 47 100 156 222  
Investment in equity method investees [8] 98   98    
Capital expenditures     396 434  
Total assets 10,300   10,300    
Contracted Energy | Intersegment revenue          
Segment Reporting Information [Line Items]          
Operating Revenue 5 3 8 5  
Corporate and Other | Operating Segments          
Segment Reporting Information [Line Items]          
Total revenue from external customers 27 (90) 55 (145)  
Operating Revenue 319 167 657 346  
Electric fuel and other energy-related purchases 0 [1] 0 [1] 0 [2] 0 [2]  
Purchased electric capacity 0 [1] 1 [1] 0 [2] 1 [2]  
Purchased gas 0 [1] 0 [1] 0 [2] 0 [2]  
Other operations and maintenance 363 [1],[3] 365 [1],[3] 767 [2],[4] 681 [2],[4]  
Depreciation and amortization 21 [1] 22 [1] 43 [2] 44 [2]  
Other taxes 15 [1] 14 [1] 36 [2] 36 [2]  
Total operating expenses 399 402 846 762  
Interest and related charges 238 [1] 231 [1] 444 [2] 574 [2]  
Income tax expense (benefit) 80 [1] (53) [1] (70) [2] (133) [2]  
Equity in earnings (losses) of equity method investees 0 [5] 0 [5] (7) [6] 0 [6]  
Other income (expense) 371 [5] 186 [5] 320 [6] 253 [6]  
Interest income 55 [5] 39 [5] 100 [6] 75 [6]  
Net Income From Discontinued Operations Including Noncontrolling Interests 1 97 0 215  
Noncontrolling Interests (26) [5]   (48) [6]    
Net income (loss) attributable to Dominion Energy 55 (91) (102) (314)  
Investment in equity method investees [8] 41   41    
Capital expenditures     36 426  
Total assets 8,800   8,800    
Corporate and Other | Intersegment revenue          
Segment Reporting Information [Line Items]          
Operating Revenue $ 292 $ 257 $ 602 $ 491  
[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.
[4] Includes impairment of assets and other charges.
[5] Items designated are other segment items for each reportable segment.
[6] Items designated are other segment items for each reportable segment.
[7] Includes income tax expense (benefit) of $(3) million and $(14) million for the three months ended June 30, 2025 and 2024, respectively, and $(3) million and $40 million for the six months ended June 30, 2025 and 2024, respectively.
[8] Excludes liability to Atlantic Coast Pipeline.
[9] Dominion Energy’s Consolidated Balance Sheet at December 31, 2024 has been derived from the audited Consolidated Balance Sheet at that date.