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v3.23.1

Related-Party Transactions (Narrative) (Detail) - USD ($) | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Jan. 31, 2023 | Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Related Party Transaction [Line Items] |  |  |  |  |
Borrowing Interest Charges |  | $ 24,000,000 |  |  |
Maximum |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Borrowing Interest Charges |  |  | $ 1,000,000 |  |
Virginia Electric and Power Company |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Payable to affiliates |  | 1,203,000,000 |  | $ 2,024,000,000 | [1]
Outstanding borrowings, net of repayments, under money pool for non-regulated subsidiaries |  | $ 0 |  | 0 |
Stock Issued During Period Shares New Issues |  | 0 | 0 |  |
Commencing Period | 20 months |  |  |  |
Lease commencement term | 2025-08 |  |  |  |
Related party transaction costs | $ 240,000,000 |  |  |  |
Virginia Electric and Power Company | Pension Benefits | Amounts Associated With Dominion Pension Plan |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Amounts due to Dominion, noncurrent |  | $ 431,000,000 |  | 422,000,000 |
Virginia Electric and Power Company | Medical Coverage for Local retirees | Amounts Associated with the Dominion Retiree Health and Welfare Plan |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Amounts due from Dominion, noncurrent |  | 534,000,000 |  | 518,000,000 |
Virginia Electric and Power Company | Affiliated Entity |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Derivative assets |  | 5,000,000 |  | 33,000,000 |
Derivative liabilities |  | 82,000,000 |  | 31,000,000 |
Virginia Electric and Power Company | Principal Owner | Short-Term Borrowing Arrangements |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Payable to affiliates |  | $ 1,200,000,000 |  | $ 2,000,000,000.0 |
[1] | Virginia Power’s Consolidated Balance Sheet at December 31, 2022 has been derived from the audited Consolidated Balance Sheet at that date.

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