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Acquisitions and Dispositions (Schedule of Capital Expenditures and Significant Noncash Items Reported As Discontinued Operations) (Detail) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019
Significant noncash items |  |  |
Charge related to a voluntary retirement program |  | $ 0 | $ 409
Accrued capital expenditures | [1],[2] | 346 | 311
Dominion Energy Gas Holdings, LLC |  |  |
Significant noncash items |  |  |
Charge related to a voluntary retirement program |  | 0 | 73
Accrued capital expenditures |  | $ 24 | 43
East Ohio | Dominion Energy Gas Holdings, LLC |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |
Capital expenditures |  |  | 168
Significant noncash items |  |  |
Charge related to a voluntary retirement program |  |  | 32
Accrued capital expenditures |  |  | 8
DGP | Dominion Energy Gas Holdings, LLC |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |
Capital expenditures |  |  | $ 8
[1] | See Note 16 for noncash financing activities related to derivative restructuring, the acquisition of the public interest in Dominion Energy Midstream and the issuance of stock purchase contracts associated with the 2019 Equity Units. See Note 18 to the Consolidated Financial Statements in Dominion Energy’s Annual Report on Form 10-K for the year ended December 31, 2019 for non-cash financing activities related to the remarketing of RSNs.
[2] | See Note 3 for noncash investing and financing activities related to the SCANA Combination.

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