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Long-Term Debt (Total Long Term Debt) (Parenthetical) (Detail) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 31, 2023 | Sep. 30, 2023 | Apr. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Feb. 23, 2024 | Mar. 31, 2023 | Aug. 31, 2022 | Aug. 31, 2021 | Jul. 31, 2016
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt repurchased value |  |  |  |  |  |  |  |  |  | $ 154 | $ 39 |
Aggregate outstanding principal |  |  |  |  |  | $ 40,206 | $ 37,522 |  |  |  |  |
Weighted-average percentage interest rates |  |  |  |  |  | 5.69% | 4.73% |  |  |  |  |
Derivative restructuring current |  |  |  |  |  | $ 143 | $ 447 |  |  |  |  |
March 2023 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt, amount redeemed |  |  |  |  |  |  |  |  | $ 450 |  |  |
Sustainability Revolving Credit Agreement | May Twenty Twenty Two |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt, amount redeemed |  |  |  |  |  | 900 |  |  |  |  |  |
Junior Subordinated Debt |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  |  |  |  |  |  |  | 5.25%
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  | $ 800
Virginia Electric and Power Company |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate outstanding principal |  |  |  |  |  | $ 17,560 | $ 15,760 |  |  |  |  |
Weighted-average percentage interest rates |  |  |  |  |  | 5.65% | 4.68% |  |  |  |  |
Dominion Energy |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan repaid |  |  | $ 2,200 |  |  |  |  |  |  |  |  |
Dominion Energy | Sustainability Revolving Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  | $ 900 |  |  |  |  |  |
Dominion Energy | Environmental Sustainability And Social Investment Initiatives | Sustainability Revolving Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from borrowings |  |  |  |  |  |  | $ 450 |  |  |  |  |
Dominion Energy | General Corporate | Sustainability Revolving Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from borrowings |  |  |  |  |  | 450 |  |  |  |  |  |
Repayments of borrowings |  | $ 450 | $ 450 | $ 450 | $ 450 |  |  |  |  |  |  |
1.45% to 7.0%, due 2023 to 2052 | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate outstanding principal | [1] |  |  |  |  | $ 11,476 | 12,476 |  |  |  |  |
Weighted-average percentage interest rates | [1],[2] |  |  |  |  | 4.14% |  |  |  |  |  |
1.45% to 7.0%, due 2023 to 2052 | Minimum | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 1.45% |  |  |  |  |  |
1.45% to 7.0%, due 2023 to 2052 | Maximum | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 7.00% |  |  |  |  |  |
3.071% due 2024 | Junior Subordinated Debt |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 3.071% |  |  |  |  |  |
Aggregate outstanding principal |  |  |  |  |  | $ 700 | 700 |  |  |  |  |
Weighted-average percentage interest rates | [2] |  |  |  |  | 3.07% |  |  |  |  |  |
8.4% due 2031 | Junior Subordinated Debt |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 8.40% |  |  |  |  |  |
Aggregate outstanding principal |  |  |  |  |  | $ 10 | 10 |  |  |  |  |
Weighted-average percentage interest rates | [2] |  |  |  |  | 8.40% |  |  |  |  |  |
5.75% due 2054 | Enhanced Junior Subordinated Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 5.75% |  |  |  |  |  |
Aggregate outstanding principal |  |  |  |  |  | $ 685 | 685 |  |  |  |  |
Weighted-average percentage interest rates | [2] |  |  |  |  | 5.75% |  |  |  |  |  |
Unsecured Senior Notes, 2.30% to 8.875%, due 2023 to 2053 | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate outstanding principal |  |  |  |  |  | $ 16,935 | 15,135 |  |  |  |  |
Unsecured Senior Notes, 2.30% to 8.875%, due 2023 to 2053 | Virginia Electric and Power Company | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate outstanding principal |  |  |  |  |  | $ 16,935 | 15,135 |  |  |  |  |
Weighted-average percentage interest rates | [2] |  |  |  |  | 4.25% |  |  |  |  |  |
Unsecured Senior Notes, 2.30% to 8.875%, due 2023 to 2053 | Minimum | Virginia Electric and Power Company |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 2.30% |  |  |  |  |  |
Unsecured Senior Notes, 2.30% to 8.875%, due 2023 to 2053 | Maximum | Virginia Electric and Power Company |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 8.875% |  |  |  |  |  |
Tax-Exempt Financings, 0.75% to 1.90%, due 2032 to 2041 | Minimum | Virginia Electric and Power Company |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 0.75% |  |  |  |  |  |
Tax-Exempt Financings, 0.75% to 3.65%, due 2032 to 2041 | Tax-Exempt Financings |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate outstanding principal | [3] |  |  |  |  | $ 625 | 625 |  |  |  |  |
Tax-Exempt Financings, 0.75% to 3.65%, due 2032 to 2041 | Virginia Electric and Power Company | Tax-Exempt Financings |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate outstanding principal | [3] |  |  |  |  | $ 625 | 625 |  |  |  |  |
Weighted-average percentage interest rates | [2],[3] |  |  |  |  | 1.77% |  |  |  |  |  |
Tax-Exempt Financings, 0.75% to 3.65%, due 2032 to 2041 | Maximum | Virginia Electric and Power Company |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 3.65% |  |  |  |  |  |
First mortgage bonds, 2.30% to 6.625%, due 2028 to 2065 | Minimum | DESC |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 2.30% |  |  |  |  |  |
First mortgage bonds, 2.30% to 6.625%, due 2028 to 2065 | Maximum | DESC |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 6.625% |  |  |  |  |  |
3.625% and 4.00%, due 2028 and 2033 | Tax-Exempt Financings |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate outstanding principal | [4] |  |  |  |  | $ 54 | 54 |  |  |  |  |
Weighted-average percentage interest rates | [2],[4] |  |  |  |  | 3.90% |  |  |  |  |  |
3.625% and 4.00%, due 2028 and 2033 | Minimum | Tax-Exempt Financings |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 3.625% |  |  |  |  |  |
3.625% and 4.00%, due 2028 and 2033 | Maximum | Tax-Exempt Financings |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 4.00% |  |  |  |  |  |
4.82%, due 2042 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 4.82% |  |  |  |  |  |
Aggregate outstanding principal | [5] |  |  |  |  | $ 291 | 308 |  |  |  |  |
Weighted-average percentage interest rates | [2],[5] |  |  |  |  | 4.82% |  |  |  |  |  |
4.82%, due 2042 | Eagle Solar, LLC | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt repurchased value |  |  |  |  |  |  |  | $ 279 |  |  |  |
Tax-Exempt Financing, 3.80% due 2033 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 3.80% |  |  |  |  |  |
Tax-Exempt Financing, 3.80% due 2033 | Tax-Exempt Financings |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate outstanding principal |  |  |  |  |  | $ 27 | $ 27 |  |  |  |  |
Weighted-average percentage interest rates | [2] |  |  |  |  | 3.80% |  |  |  |  |  |
Industrial Revenue Bonds |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate outstanding principal |  |  |  |  |  | $ 68 |  |  |  |  |  |
Long term debt due within one year | Virginia Electric and Power Company |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average percentage interest rates |  |  |  |  |  | 3.45% |  |  |  |  |  |
Long term debt due within one year | Dominion Energy |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average percentage interest rates |  |  |  |  |  | 5.79% |  |  |  |  |  |
[1] | Includes debt assumed by Dominion Energy from the merger of its former CNG subsidiary.
[2] | Represents weighted-average coupon rates for debt outstanding as of December 31, 2023.
[3] | These financings relate to certain pollution control equipment at Virginia Power’s generating facilities.
[4] | Industrial revenue bonds totaling $68 million are secured by letters of credit that expire, subject to renewal, in the fourth quarter of 2024.
[5] | Represents debt associated with Eagle Solar. In February 2024, Eagle Solar redeemed the remaining principal outstanding of $279 million. The debt which otherwise would have matured in 2042 was nonrecourse to Dominion Energy and was secured by Eagle Solar's interest in certain solar facilities. As such, these borrowings are presented within securities due within one year in Dominion Energy’s Consolidated Balance Sheets at December 31, 2023.

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