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Significant Financing Transactions (Narrative) (Detail) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2025 | Aug. 31, 2025 | Jun. 30, 2025 | May 31, 2025 | Apr. 30, 2025 | Feb. 28, 2025 | Jun. 30, 2024 | Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | Oct. 31, 2025 | Jul. 31, 2025 | Jan. 31, 2025 | Dec. 31, 2023 | Mar. 31, 2023 | Nov. 30, 2020 | Nov. 30, 2017
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  | $ 8,000,000,000 |  |  |  |  |  |  | $ 8,000,000,000 |  |  |  | $ 8,000,000,000 |  |  |  |  |  |  |  |  |  |
Short-term debt |  | $ 2,522,000,000 |  |  |  |  |  |  | $ 2,522,000,000 |  |  |  | 2,522,000,000 |  | $ 2,500,000,000 | [1] |  |  |  |  |  |  |
Line of credit issued |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 3,000,000,000 |  |  |  |  |  |  |  |  |
Preferred stock shares authorized |  | 20,000,000 |  |  |  |  |  |  | 20,000,000 |  |  |  | 20,000,000 |  |  |  |  |  |  |  |  |  |
Dividend stock |  |  |  |  |  |  |  |  | $ 11,000,000 |  |  | $ 15,000,000 | $ 33,000,000 | 63,000,000 |  |  |  |  |  |  |  |  |
Borrowings outstanding |  | $ 0 |  |  |  |  |  |  | 0 |  |  |  | 0 |  | 0 |  |  |  |  |  |  |  |
Issuance of common stock |  |  |  |  |  |  |  |  |  |  |  |  | 105,000,000 | 102,000,000 |  |  |  |  |  |  |  |  |
Issuance of common stock |  |  |  |  |  |  |  |  | $ 35,000,000 |  |  | $ 35,000,000 | $ 105,000,000 | $ 102,000,000 |  |  |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchased, shares |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |
Issuance of stock (in shares) |  |  |  |  |  |  |  |  | 1,000,000 |  |  | 1,000,000 | 2,000,000 | 2,000,000 |  |  |  |  |  |  |  |  |
Issuance of common stock |  |  |  |  |  |  |  |  | $ 35,000,000 |  |  | $ 35,000,000 | $ 105,000,000 | $ 102,000,000 |  |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  | $ 900,000,000 |  |  |  |  |  |  | $ 900,000,000 |  |  |  | 900,000,000 |  |  |  |  |  |  |  |  | $ 1,000,000,000 |
Series B Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock tendered, aggregate liquidation preference |  |  |  |  |  |  |  | $ 440,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deemed dividends |  |  |  |  |  |  |  | $ 9,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Various Programs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock |  |  |  |  |  |  |  |  |  |  |  |  | $ 105,000,000 | $ 102,000,000 |  |  |  |  |  |  |  |  |
Various Programs | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of stock (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 | 2,000,000 |  |  |  |  |  |  |  |  |
Forward Sale Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forward sale agreements, number of shares of common stock to be settled |  | 2,400,000 |  | 11,000,000 |  |  |  |  | 2,400,000 | 11,000,000 | 8,800,000 |  | 2,400,000 |  |  |  |  |  |  |  |  |  |
Weighted average initial forward price per share |  |  |  |  |  |  |  |  | $ 59.91 | $ 55.83 | $ 55.34 |  |  |  |  |  |  |  |  |  |  |  |
Forward Sale Agreement Expected to be Settled in Fourth Quarter of 2027 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forward sale agreements, number of shares of common stock to be settled |  | 9,600,000 |  |  |  |  |  |  | 9,600,000 |  |  |  | 9,600,000 |  |  |  |  |  |  |  |  |  |
Weighted average initial forward price per share |  |  |  |  |  |  |  |  | $ 61.11 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Forward Sale Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forward sale agreements, number of shares of common stock to be settled |  |  |  |  |  |  |  |  |  |  | 18,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Weighted average initial forward price per share |  |  |  |  |  |  |  |  |  |  | $ 56.62 |  |  |  |  |  |  |  |  |  |  |  |
Sales Agency Agreements to Effect Sales Under At-the-market Program | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock authorized amount |  |  |  |  |  |  | $ 1,200,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Floating Rate Demand Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term debt |  | $ 451,000,000 |  |  |  |  |  |  | $ 451,000,000 |  |  |  | $ 451,000,000 |  | 439,000,000 |  |  |  |  |  |  |  |
Floating Rate Demand Notes | Shelf Registration for Sale of Demand Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,000,000,000
DESC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  |  |  | $ 1,000,000,000 |  | $ 500,000,000 |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |  | $ 900,000,000 |  |  |  |  |
Short-term indebtedness outstanding |  |  |  |  |  |  |  |  |  |  | $ 1,800,000,000 |  |  |  |  |  |  |  |  |  |  |  |
GENCO |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term indebtedness outstanding |  |  |  |  |  |  |  |  |  |  | $ 300,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Virginia Electric and Power Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit | [2] | 7,000,000,000 |  |  |  |  |  |  | 7,000,000,000 |  |  |  | 7,000,000,000 |  |  |  |  |  |  |  |  |  |
Short-term debt |  | $ 0 |  |  |  |  |  |  | 0 |  |  |  | 0 |  | $ 950,000,000 | [3] |  |  |  |  |  |  |
Issuance of common stock |  |  | $ 1,400,000,000 | $ 2,100,000,000 |  |  |  |  |  |  |  |  | 3,500,000,000 | $ 0 |  |  |  |  |  |  |  |  |
Issuance of common stock |  |  |  |  |  |  |  |  | $ 1,400,000,000 |  |  |  | $ 3,500,000,000 |  |  |  |  |  |  |  |  |  |
Virginia Electric and Power Company | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of stock (in shares) |  |  | 19,630 | 30,006 |  |  |  |  | 20,000 |  |  |  | 50,000 |  | 0 |  |  |  |  |  |  |  |
Issuance of common stock |  |  |  |  |  |  |  |  | $ 1,400,000,000 |  |  |  | $ 3,500,000,000 |  |  |  |  |  |  |  |  |  |
Virginia Electric and Power Company | Senior Notes Due In 2035 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity year |  | 2035 |  |  |  |  |  |  |  |  | 2035 |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  | 4.90% |  |  |  |  |  |  | 4.90% |  | 5.15% |  | 4.90% |  |  |  |  |  |  |  |  |  |
Debt issued amount |  | $ 825,000,000 |  |  |  |  |  |  | $ 825,000,000 |  | $ 625,000,000 |  | $ 825,000,000 |  |  |  |  |  |  |  |  |  |
Virginia Electric and Power Company | Senior Notes Due In 2055 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity year |  | 2055 |  |  |  |  |  |  |  |  | 2055 |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  | 5.60% |  |  |  |  |  |  | 5.60% |  | 5.65% |  | 5.60% |  |  |  |  |  |  |  |  |  |
Debt issued amount |  | $ 875,000,000 |  |  |  |  |  |  | $ 875,000,000 |  | $ 625,000,000 |  | $ 875,000,000 |  |  |  |  |  |  |  |  |  |
Virginia Electric and Power Company | Tax Exempt Financings 3.125% Due 2030 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  | 3.125% |  |  |  |  |  |  | 3.125% |  |  |  | 3.125% |  |  |  |  |  |  |  |  |  |
Outstanding principal |  | $ 222,000,000 |  |  |  |  |  |  | $ 222,000,000 |  |  |  | $ 222,000,000 |  |  |  |  |  |  |  |  |  |
Debt, maturity month and year |  | 2030-10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy | Junior Subordinated Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Junior subordinated notes |  |  | $ 1,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy | Junior Subordinated Debt | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Junior subordinated notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,300,000,000 |  |  |  |  |  |
Dominion Energy | Series B Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock shares outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 800,000 |  |  |
Preferred stock shares issued |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 800,000 |  |  |
Dividend stock |  |  |  |  |  |  |  |  |  |  |  | 4,000,000 |  | $ 21,000,000 |  |  |  |  |  |  |  |  |
Preferred stock dividend per share |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 33.172 |  |  |  |  |  |  |  |  |
Stock repurchased, shares |  |  |  |  |  |  |  | 400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy | Series C Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock shares outstanding |  | 1,000,000 |  |  |  |  |  |  | 1,000,000 |  |  |  | 1,000,000 |  | 1,000,000 |  |  |  |  |  |  |  |
Dividend stock |  |  |  |  |  |  |  |  | $ 11,000,000 |  |  | $ 11,000,000 | $ 33,000,000 | $ 33,000,000 |  |  |  |  |  |  |  |  |
Preferred stock dividend per share |  |  |  |  |  |  |  |  | $ 10.875 |  |  | $ 10.875 | $ 32.625 | $ 32.625 |  |  |  |  |  |  |  |  |
Dominion Energy | Series D Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividend per share |  |  |  |  |  |  |  |  |  |  |  | $ 11.625 |  |  |  |  |  |  |  |  |  |  |
Dominion Energy | 2025 Series A JSN |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity year |  |  | 2056 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  | 6.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest reset period |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, basis spread rate |  |  | 2.262% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period of deferral |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] |  |  | us-gaap:UsTreasuryUstInterestRateMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy | 2025 Series A JSN | Junior Subordinated Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Junior subordinated notes |  |  | $ 825,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy | 2025 Series A JSN | Junior Subordinated Debt | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Junior subordinated notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 625,000,000 |  |  |  |  |  |
Dominion Energy | 2025 Series A JSN | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate minimum reset |  |  | 6.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy | 2025 Series B JSN |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity year |  |  | 2056 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  | 6.20% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest reset period |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, basis spread rate |  |  | 2.006% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period of deferral |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] |  |  | us-gaap:UsTreasuryUstInterestRateMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy | 2025 Series B JSN | Junior Subordinated Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Junior subordinated notes |  |  | $ 700,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy | 2025 Series B JSN | Junior Subordinated Debt | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Junior subordinated notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 625,000,000 |  |  |  |  |  |
Dominion Energy | 2025 Series B JSN | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate minimum reset |  |  | 6.20% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy | Senior Notes Due In February 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recorded interest expense |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,000,000 |  |  |  |  |  |  |  |  |  |
Dominion Energy | Senior Notes Due In 2030 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity year |  |  |  |  |  |  |  |  |  |  | 2030 |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  |  |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |
Debt issued amount |  |  |  |  |  |  |  |  |  |  | $ 800,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy | Senior Notes Due In 2035 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity year |  |  |  |  |  |  |  |  |  |  | 2035 |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  |  |  |  |  |  | 5.45% |  |  |  |  |  |  |  |  |  |  |  |
Debt issued amount |  |  |  |  |  |  |  |  |  |  | $ 700,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy | Senior Notes Due In 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity year |  |  |  |  | 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  | 4.60% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issued amount |  |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DESC | First Mortgage Bonds Due in 2035 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.30% |  |  |  |
Debt issued amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 450,000,000 |  |  |  |
Joint Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  | $ 6,000,000,000 |  |  |  | 7,000,000,000 |  |  | $ 6,000,000,000 |  |  |  | 6,000,000,000 |  |  |  |  |  |  |  |  |  |
Letter of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000,000 |  |
Letters of credit issued and outstanding |  | 86,000,000 |  |  |  |  |  |  | 86,000,000 |  |  |  | 86,000,000 |  | $ 48,000,000 |  |  |  |  |  |  |  |
Letter of Credit | Credit Facility, Maturing in June 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  | 275,000,000 |  |  |  |  |  |  | 275,000,000 |  |  |  | 275,000,000 |  |  |  |  |  |  |  |  |  |
Letters of credit issued and outstanding |  | 89,000,000 |  |  |  |  |  |  | 89,000,000 |  |  |  | 89,000,000 |  | 88,000,000 |  |  |  |  |  |  |  |
Letter of Credit | Credit Facility Maturing In April 2030 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  |  |  |  |  | $ 3,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maturity date |  |  |  |  |  | Apr. 30, 2030 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letter of Credit | Credit Facility Maturing In June 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  | 2,000,000,000 |  |  |  |  |  |  | 2,000,000,000 |  |  |  | $ 2,000,000,000 |  |  |  |  |  |  |  |  |  |
Line of credit facility, maturity date |  |  |  |  |  |  |  |  |  |  |  |  | Jun. 30, 2026 |  |  |  |  |  |  |  |  |  |
Letter of Credit | Credit Facility in January 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 150,000,000 |  |  |  |
Letters of credit issued and outstanding |  | 52,000,000 |  |  |  |  |  |  | 52,000,000 |  |  |  | $ 52,000,000 |  |  |  |  |  |  |  |  |  |
Letter of Credit | DESC | Credit Facility, Maturing in June 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit issued and outstanding |  | 89,000,000 |  |  |  |  |  |  | 89,000,000 |  |  |  | 89,000,000 |  | 88,000,000 |  |  |  |  |  |  |  |
Letter of Credit | DESC | Credit Facility in January 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50,000,000 |  |  |  |
Letter of Credit | Virginia Electric and Power Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 300,000,000 |  |
Line of credit issued |  |  |  |  |  |  |  |  |  |  |  |  | 208,000,000 |  | 112,000,000 |  |  |  |  |  |  |  |
Letter of Credit | Virginia Electric and Power Company | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  | 3,000,000,000 |  |  |  |  |  |  | 3,000,000,000 |  |  |  | 3,000,000,000 |  |  |  |  |  |  |  |  |  |
Letter of Credit | Virginia Electric and Power Company | Credit Facility, Maturing in June 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  | 275,000,000 |  |  |  |  |  |  | 275,000,000 |  |  |  | 275,000,000 |  |  |  |  |  |  |  |  |  |
Letters of credit issued and outstanding |  | 78,000,000 |  |  |  |  |  |  | 78,000,000 |  |  |  | 78,000,000 |  | $ 77,000,000 |  |  |  |  |  |  |  |
Letter of Credit | Virginia Electric and Power Company | Credit Facility in January 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000,000 |  |  |  |
Letters of credit issued and outstanding |  | 50,000,000 |  |  |  |  |  |  | 50,000,000 |  |  |  | 50,000,000 |  |  |  |  |  |  |  |  |  |
Letter of Credit | Virginia Electric and Power Company | Credit Facility in January 2025 | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit issued and outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50,000,000 |  |  |  |  |  |
Letter of Credit | Virginia Electric and Power Company | Credit Facility One in September 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  | 300,000,000 |  |  |  |  |  |  | 300,000,000 |  |  |  | 300,000,000 |  |  |  |  |  |  |  |  |  |
Letters of credit issued and outstanding |  | 0 |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  |  |  |  |  |  |  |
Letter of Credit | Virginia Electric and Power Company | Credit Facility One in September 2025 | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit issued and outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 262,000,000 |  |  |  |  |  |
Letter of Credit | Virginia Electric and Power Company | Credit Facility Two in September 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  | $ 2,200,000,000 |  |  |  |  |  |  | $ 2,200,000,000 |  |  |  | $ 2,200,000,000 |  |  |  |  |  |  |  |  |  |
Letter of Credit | Virginia Electric and Power Company | Credit Facility Two in September 2025 | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit issued and outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,100,000,000 |  |  |  |  |  |
Sustainability Revolving Credit Facility | Credit Facility Maturing In June 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  |  |  |  |  | $ 900,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maturity date |  |  |  |  |  | Apr. 30, 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sustainability Revolving Credit Facility | Credit Facility Maturing In April 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  |  |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maturity date |  |  |  |  |  | Apr. 30, 2030 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Dominion Energy’s Consolidated Balance Sheet at December 31, 2024 has been derived from the audited Consolidated Balance Sheet at that date.
[2] | The full amount of the facility is available to Virginia Power, less any amounts outstanding to co-borrowers Dominion Energy and DESC. The sub-limit for Virginia Power is set pursuant to the terms of the facility but can be changed at the option of the borrowers multiple times per year. In April 2025, the sub-limit for Virginia Power was increased from $1.75 billion to $3.0 billion. In July 2025, the sub-limit was increased to $4.0 billion. If Virginia Power has liquidity needs in excess of its current sub-limit, the sub-limit may be changed or such needs may be satisfied through short-term intercompany borrowings from Dominion Energy. This credit facility matures in April 2030, with the potential to be extended by the borrowers to April 2032. The credit facility can be used to support bank borrowings and the issuance of commercial paper, as well as to support up to $3.0 billion (or the sub-limit, whichever is less) of letters of credit.
[3] | Virginia Power’s Consolidated Balance Sheet at December 31, 2024 has been derived from the audited Consolidated Balance Sheet at that date.

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