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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 | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Significant noncash items |  |  |  |  |
Charges related to a voluntary retirement program |  |  |  | $ 0 | $ 384
Depreciation, depletion and amortization |  | $ 595 | $ 586 | 1,751 | 1,713
Accrued capital expenditures | [1],[2] |  |  | 461 | 378
Dominion Energy Gas Holdings, LLC | Gas, Transmission & Storage |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |
Capital expenditures |  |  |  | 240 | 265
Significant noncash items |  |  |  |  |
Impairment of assets and other charges |  |  |  | 463 | 13
Charges related to a voluntary retirement program |  |  |  | 0 | 22
Depreciation, depletion and amortization |  |  |  | 173 | 240
Accrued capital expenditures |  |  |  | 43 | 42
Dominion Energy Gas Holdings, LLC | Q-Pipe Transaction |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |
Capital expenditures |  |  |  | 27 | 32
Significant noncash items |  |  |  |  |
Impairment of assets and other charges |  |  |  | 0 | 0
Charges related to a voluntary retirement program |  |  |  | 0 | 4
Depreciation, depletion and amortization |  |  |  | 25 | 38
Accrued capital expenditures |  |  |  | $ 2 | $ 3
[1] | See Note 16 for noncash financing activities related to derivative restructuring, the acquisition of the public interest in Dominion Energy Midstream, the issuance of stock purchase contracts associated with the 2019 Equity Units and the issuance of common stock associated with the settlement of litigation. See Note 17 for noncash investing activities related to property, plant and equipment conveyed to satisfy litigation. 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 noncash 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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