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Significant Accounting Policies (Schedule of Supplemental Cash Flow Information) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Schedule Of Supplemental Cash Flow Information [Line Items] |  |  |  |
Interest and related charges, excluding capitalized amounts |  | $ 1,991 | $ 1,408 | $ 1,340
Income taxes |  | 286 | 139 | 160
Significant noncash investing and financing activities: |  |  |  |
Accrued capital expenditures | [1],[2] | 1,085 | 979 | 637
Leases | [3] | 255 | 144 | 96
Virginia Electric and Power Company |  |  |  |
Schedule Of Supplemental Cash Flow Information [Line Items] |  |  |  |
Interest and related charges, excluding capitalized amounts |  | 709 | 599 | 501
Income taxes |  | (47) | (54) | 109
Significant noncash investing and financing activities: |  |  |  |
Accrued capital expenditures |  | 807 | 665 | 363
Leases | [4] | $ 203 | $ 116 | $ 79
[1] | See Note 9 for noncash investing activities related to the acquisition of a noncontrolling interest in Wrangler and Dominion Privatization.
[2] | See Notes 18, 19, 20 and 23 for noncash financing activities related to the contribution of stock to Dominion Energy’s defined benefit pension plan, remarketing of Series A Preferred Stock and the issuance of common stock and transfer of property associated with the settlement of litigation.
[3] | Includes $44 million of finance leases and $211 million of operating leases entered in 2023, $34 million of finance leases and $110 million of operating leases entered in 2022 and $47 million of finance leases and $49 million of operating leases entered in 2021.
[4] | Includes $30 million of finance leases and $173 million of operating leases entered in 2023, $26 million of finance leases and $90 million of operating leases entered in 2022 and $37 million of finance leases and $42 million of operating leases entered in 2021.

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