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Operating Segments (Schedule of Segment Reporting Information, by Segment) (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Segment Reporting Information [Line Items] |  |  |
Operating Revenue |  | $ 3,632 | $ 3,883
Net Income from discontinued operations including noncontrolling interest | [1] | 114 | 281
Net income attributable to Dominion Energy |  | 674 | 981
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenue from external customers |  | 3,632 | 3,883
Adjustments & Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenue from external customers |  | 0 | 0
Net Income from discontinued operations including noncontrolling interest |  | 0 | 0
Net income attributable to Dominion Energy |  | 0 | 0
Intersegment revenue |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenue |  | 0 | 0
Adjustments & Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenue |  | (237) | (236)
Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenue |  | (237) | (236)
Dominion Energy Virginia | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenue from external customers |  | 2,489 | 2,384
Operating Revenue |  | 2,489 | 2,384
Net Income from discontinued operations including noncontrolling interest |  | 0 | 0
Net income attributable to Dominion Energy |  | 424 | 386
Dominion Energy Virginia | Intersegment revenue |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenue |  | 0 | 0
Dominion Energy South Carolina | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenue from external customers |  | 892 | 844
Operating Revenue |  | 893 | 845
Net Income from discontinued operations including noncontrolling interest |  | 0 | 0
Net income attributable to Dominion Energy |  | 80 | 91
Dominion Energy South Carolina | Intersegment revenue |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenue |  | 1 | 1
Contracted Energy | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenue from external customers |  | 306 | 308
Operating Revenue |  | 308 | 311
Net Income from discontinued operations including noncontrolling interest |  | 0 | 0
Net income attributable to Dominion Energy |  | 122 | 111
Contracted Energy | Intersegment revenue |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenue |  | 2 | 3
Corporate and Other | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenue from external customers |  | (55) | 347
Operating Revenue |  | 179 | 579
Net Income from discontinued operations including noncontrolling interest |  | 114 | 281
Net income attributable to Dominion Energy |  | 48 | 393
Corporate and Other | Intersegment revenue |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenue |  | $ 234 | $ 232
[1] | Includes income tax expense of $51 million and $56 million for the three months ended March 31, 2024 and 2023, respectively.

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