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Significant Financing Transactions (Commercial Paper, Bank Loans and Letters of Credit Outstanding) (Detail) | Sep. 30, 2025 USD ($)
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Line of Credit Facility [Line Items] |  |
Facility Limit | $ 8,000,000,000 |
Outstanding Commercial Paper | 2,071,000,000 |
Outstanding Letters of Credit | 1,000,000 |
Facility Capacity Available | 5,928,000,000 |
Joint Revolving Credit Facility |  |
Line of Credit Facility [Line Items] |  |
Facility Limit | 7,000,000,000 | [1]
Outstanding Commercial Paper | 2,071,000,000 | [1]
Outstanding Letters of Credit | 1,000,000 | [1]
Facility Capacity Available | 4,928,000,000 | [1]
364-Day Revolving Credit Facility |  |
Line of Credit Facility [Line Items] |  |
Facility Limit | 1,000,000,000 | [2]
Outstanding Commercial Paper | 0 | [2]
Outstanding Letters of Credit | 0 | [2]
Facility Capacity Available | 1,000,000,000 | [2]
Virginia Electric and Power Company |  |
Line of Credit Facility [Line Items] |  |
Facility Limit | 7,000,000,000 | [3]
Outstanding Commercial Paper | 0 | [3]
Outstanding Letters of Credit | $ 0 | [3]
[1] | This credit facility matures in April 2030, with the potential to be extended by the borrowers to April 2032, and can be used by the borrowers under the credit facility to support bank borrowings and the issuance of commercial paper, as well as to support up to a combined $3.0 billion of letters of credit.
[2] | This credit facility, entered into in April 2025 with certain lenders, matures in April 2026, bears interest at a variable rate and contains a maximum allowed total debt to total capital ratio consistent with such allowed ratio under Dominion Energy’s joint revolving credit facility. This credit facility can be used to support bank borrowings and the issuance of commercial paper.
[3] | 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.

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