v3.25.2
Acquisitions and Dispositions - (Schedule of Capital Expenditures and Significant Noncash Items Reported As Discontinued Operations) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
 [1]
Jun. 30, 2024
 [1]
Jun. 30, 2025
Jun. 30, 2024
Significant noncash items        
Depreciation, depletion and amortization $ 580 $ 621 $ 1,162 [2] $ 1,242 [2]
Accrued capital expenditures [3]     $ 871 929
East Ohio | Enbridge        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Capital expenditures [4]       65
Significant noncash items        
Depreciation, depletion and amortization [4]       0
PSNC | Enbridge        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Capital expenditures       189
Significant noncash items        
Depreciation, depletion and amortization       0
Accrued capital expenditures       57
Questar Gas and Wexpro | Enbridge        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Capital expenditures       160
Significant noncash items        
Depreciation, depletion and amortization       0
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
[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.
[3] See Note 3 for noncash financing activities related to debt assumed with the closing of the East Ohio and Questar Gas Transactions.
[4] Represents amounts attributable to Dominion Energy prior to the closing of the East Ohio Transaction which closed on March 6, 2024 and the Questar Gas Transaction which closed on May 31, 2024.