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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, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Schedule Of Supplemental Cash Flow Information [Line Items] |  |  |  |
Interest and related charges, excluding capitalized amounts |  | $ 1,408 | $ 1,340 | $ 1,519
Income taxes |  | 139 | 160 | 292
Significant noncash investing and financing activities: |  |  |  |
Accrued capital expenditures | [1],[2] | 979 | 637 | 485
Leases | [3] | 144 | 96 | 173
Virginia Electric and Power Company |  |  |  |
Schedule Of Supplemental Cash Flow Information [Line Items] |  |  |  |
Interest and related charges, excluding capitalized amounts |  | 599 | 501 | 491
Income taxes |  | (54) | 109 | 452
Significant noncash investing and financing activities: |  |  |  |
Accrued capital expenditures | [4] | 665 | 363 | 262
Leases | [5] | $ 116 | $ 79 | $ 32
[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, derivative restructuring and the issuance of common stock and transfer of property associated with the settlement of litigation.
[3] | Includes $34 million of finance leases and $110 million of operating leases entered in 2022, $47 million of finance leases and $49 million of operating leases entered in 2021 and $46 million of finance leases and $127 million of operating leases entered in 2020.
[4] | See Note 18 for non-cash financing activities related to derivative restructuring.
[5] | Includes $26 million of finance leases and $90 million of operating leases entered in 2022, $37 million of finance leases and $42 million of operating leases entered in 2021 and $32 million of finance leases entered in 2020.

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