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Acquisitions and Dispositions - (Schedule of Capital Expenditures and Significant Noncash Items Reported As Discontinued Operations) (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Significant noncash items |  |  |
Depreciation, depletion and amortization | [1] | $ 582 | $ 621
Accrued capital expenditures | [2] | $ 1,037 | 753
East Ohio | Enbridge |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Capital expenditures | [3] |  | 65
Significant noncash items |  |  |
Depreciation, depletion and amortization | [3] |  | 0
PSNC | Enbridge |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Capital expenditures |  |  | 82
Significant noncash items |  |  |
Depreciation, depletion and amortization |  |  | 0
Accrued capital expenditures |  |  | 55
Questar Gas and Wexpro | Enbridge |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Capital expenditures |  |  | 100
Significant noncash items |  |  |
Depreciation, depletion and amortization |  |  | 0
Accrued capital expenditures |  |  | 20
Other Sales |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Capital expenditures |  |  | 0
Significant noncash items |  |  |
Depreciation, depletion and amortization |  |  | 0
Accrued capital expenditures |  |  | $ 0
[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] | See Note 3 for noncash financing activities related to debt assumed with the closing of the East Ohio Transaction.
[3] | Represents amounts attributable to Dominion Energy prior to the closing of the East Ohio Transaction which closed on March 6, 2024.

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