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Property, Plant and Equipment (Schedule of Nonregulated Solar Projects) (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($) MW | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Property Plant And Equipment [Line Items] |  |  |  |
Project Cost |  | $ 229 | $ 24 | $ 167
Acquisition of Solar Project Hardin I in Ohio |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Date Agreement Entered |  | 2020-08 |  |
Date Agreement Closed | [1] | Terminated |  |
Acquisition of Solar Project Madison in Virginia |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Date Agreement Entered | [2] | 2020-07 |  |
Date Agreement Closed | [2] | 2020-07 |  |
Project Cost | [2],[3] | $ 165 |  |
MW Capacity | MW | [2] | 62 |  |
Acquisition Of Solar Project Atlanta Farms In Ohio |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Date Agreement Entered |  | 2022-03 |  |
Date Agreement Closed |  | 2022-05 |  |
Project Cost | [3] | $ 390 |  |
Date of Commercial Operations | [4] | January 2025 |  |
MW Capacity | MW |  | 200 |  |
Acquisition of Solar Project Foxhound in Virginia |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Date Agreement Entered |  | 2023-03 |  |
Date Agreement Closed |  | 2024-02 |  |
Project Cost | [3] | $ 195 |  |
Date of Commercial Operations | [4] | April 2024 |  |
MW Capacity | MW |  | 83 |  |
Virginia Electric and Power Company |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Project Cost |  | $ 40 | $ 24 | $ 77
Virginia Electric and Power Company | Acquisition of Solar Project Ft. Powhatan in Virginia |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Date Agreement Entered |  | 2019-06 |  |
Date Agreement Closed |  | 2019-06 |  |
Project Cost | [5] | $ 267 |  |
Date of Commercial Operations |  | January 2022 |  |
MW Capacity | MW |  | 150 |  |
Virginia Electric and Power Company | Acquisition of Solar Project Maplewood in Virginia |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Date Agreement Entered |  | 2019-10 |  |
Date Agreement Closed |  | 2019-10 |  |
Project Cost | [5] | $ 210 |  |
Date of Commercial Operations |  | December 2022 |  |
MW Capacity | MW |  | 120 |  |
Virginia Electric and Power Company | Acquisition of Solar Project Pumpkinseed in Virginia |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Date Agreement Entered |  | 2020-05 |  |
Date Agreement Closed |  | 2020-05 |  |
Project Cost | [5] | $ 138 |  |
Date of Commercial Operations |  | September 2022 |  |
MW Capacity | MW |  | 60 |  |
[1] | In January 2023, Dominion Energy terminated its agreement, without penalty, to acquire Hardin II.
[2] | Madison was reflected in the Corporate and Other segment before its sale 2024. See Note 3 for discussion.
[3] | Includes acquisition costs.
[4] | Dominion Energy expects to claim production tax credits on the energy generated and sold by these projects.
[5] | Includes acquisition costs.

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