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v3.25.1

Acquisitions and Dispositions (Business Review Dispositions) (Narrative) (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2023
Business Acquisition And Dispositions [Line Items] |  |  |  |  |
Income tax expense (benefit) | [1] | $ 55 | $ 55 |  |
Deferred income tax expense (benefit) |  | $ 82 | (237) |  |
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 loss |  |  | (97) |  |
Disposal group, 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, recognized a pre-tax loss |  |  | 78 | 236 |
Disposal group, loss recorded after tax |  |  | 78 | 231 |
Income tax expense (benefit) |  |  | (5) |  |
Deferred income tax expense (benefit) |  |  | $ (10) | $ 472 |
[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.

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