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v3.25.2

Acquisitions and Dispositions (Business Review Dispositions) (Narrative) (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
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Jun. 30, 2025 | [1] | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Apr. 30, 2024 | Sep. 30, 2023
Business Acquisition And Dispositions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Income tax expense (benefit) | $ 220 | $ 112 | [1] |  | $ 260 | [2] | $ 208 | [2] |  |  |  |
Deferred income tax expense (benefit) |  |  |  |  | $ 192 |  | $ (74) |  |  |  |  |
East Ohio | Enbridge |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition And Dispositions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Disposal group, total value of consideration |  |  |  |  |  |  |  |  |  |  |  | $ 6,600
Disposal group, cash consideration |  |  |  |  |  |  |  |  |  |  |  | 4,300
Disposal group, indebtedness |  |  |  |  |  |  |  |  |  |  |  | 2,300
Disposal group, recognized a pre-tax gain (loss) |  |  |  | $ (97) |  |  |  |  |  |  |  |
Disposal group, gain (loss) recorded after tax |  |  |  | (109) |  |  |  |  |  |  |  |
Goodwill write-off |  |  |  | 1,500 |  |  |  |  |  |  |  |
Deferred income tax expense (benefit) |  |  |  |  |  |  |  |  |  | $ 29 |  |
Questar Gas and Wexpro | Enbridge |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition And Dispositions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Disposal group, total value of consideration |  |  |  |  |  |  |  |  |  |  |  | 4,300
Disposal group, cash consideration |  |  |  |  |  |  |  |  |  |  |  | 3,000
Disposal group, indebtedness |  |  |  |  |  |  |  |  |  |  |  | $ 1,300
Disposal group, recognized a pre-tax gain (loss) |  | (9) |  | 78 |  |  |  |  |  | 236 |  |
Disposal group, gain (loss) recorded after tax |  | $ 33 |  | 78 |  |  |  |  |  | 231 |  |
Goodwill write-off |  |  |  |  |  |  |  |  | $ 700 |  |  |
Income tax expense (benefit) |  |  |  | (5) |  |  |  |  |  |  |  |
Deferred income tax expense (benefit) |  |  |  | $ (10) |  |  |  |  |  | 472 |  |
PSNC | Enbridge |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition And Dispositions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Deferred income tax expense (benefit) |  |  |  |  |  |  |  |  |  | $ 334 |  |
Deferred tax of classified held for sale |  |  |  |  |  |  |  |  | $ 16 |  |  |
Other Sales | Birdseye and Madison |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition And Dispositions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Disposal group, cash consideration |  |  |  |  |  |  |  |  |  |  | $ 17 |
[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.

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