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Significant Accounting Policies (Schedule of Supplemental Cash Flow Information) (Detail) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021
Significant noncash investing and financing activities:(1) |  |  |
Accrued capital expenditures | [1] | $ 745 | $ 374
Leases | [2] | 129 | 75
Virginia Electric and Power Company |  |  |
Significant noncash investing and financing activities:(1) |  |  |
Accrued capital expenditures |  | 454 | 238
Leases | [3] | $ 113 | $ 59
[1] | See Note 10 for noncash investing activities related to the acquisition of a noncontrolling interest in Dominion Privatization and Notes 16 and 17 for noncash financing activities related to the remarketing of Series A Preferred Stock and the issuance of common stock and transfer of property associated with the settlement of litigation.
[2] | See Note 10 for noncash investing activities related to the acquisition of a noncontrolling interest in Dominion Privatization and Notes 16 and 17 for noncash financing activities related to the remarketing of Series A Preferred Stock and the issuance of common stock and transfer of property associated with the settlement of litigation.
[3] | Includes $20 million and $24 million of financing leases at September 30, 2022 and 2021, respectively, and $93 million and $35 million of operating leases at September 30, 2022 and 2021, respectively

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