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Variable Interest Entities - (Narrative) (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Payable to affiliates | [1] | $ 1,796 |  | $ 1,796 |  | $ 1,732 | [2]
Regulatory assets-current | [3] | 1,030 |  | 1,030 |  | 1,309 | [2]
Other current assets | [3] | 550 |  | 550 |  | 459 | [2]
Regulatory assets-noncurrent | [3] | 8,352 |  | 8,352 |  | 8,356 | [2]
Securities due within one year | [3] | 1,820 |  | 1,820 |  | 6,589 | [2]
Accrued interest, payroll and taxes | [3] | 1,354 |  | 1,354 |  | 1,075 | [2]
Long-term debt |  | 37,101 |  | 37,101 |  | 33,248 | [2]
Virginia Electric and Power Company |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Payable to affiliates |  | 1,328 |  | 1,328 |  | 1,285 | [4]
Regulatory assets-current | [5] | 751 |  | 751 |  | 868 | [4]
Other current assets | [5] | 271 |  | 271 |  | 141 | [4]
Regulatory assets-noncurrent | [5] | 4,561 |  | 4,561 |  | 4,317 | [4]
Securities due within one year |  | 540 |  | 540 |  | 381 | [4]
Accrued interest, payroll and taxes |  | 493 |  | 493 |  | 293 | [4]
Long-term debt |  | 20,104 |  | 20,104 |  | 17,115 | [4]
Variable Interest Entity Not Primary Beneficiary | Virginia Electric and Power Company |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Regulatory assets-current |  | 119 |  | 119 |  |  |
Other current assets |  | 100 |  | 100 |  |  |
Regulatory assets-noncurrent |  | 1,100 |  | 1,100 |  |  |
Securities due within one year |  | 146 |  | 146 |  |  |
Accrued interest, payroll and taxes |  | 40 |  | 40 |  |  |
Long-term debt |  | 1,100 |  | 1,100 |  |  |
Variable Interest Entity Not Primary Beneficiary | Virginia Electric and Power Company | DES |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Shared Services Purchased |  | 125 | $ 113 | 368 | $ 339 |  |
Variable Interest Entity Not Primary Beneficiary | Virginia Electric and Power Company | DES | Related Party |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Payable to affiliates |  | $ 33 |  | $ 33 |  | $ 32 |
[1] | See Note 10 for amounts attributable to related parties.
[2] | Dominion Energy’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date.
[3] | See Note 15 for amounts attributable to VIEs.
[4] | Virginia Power’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date.
[5] | See Note 15 for amounts attributable to VIEs.

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