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Significant Accounting Policies (Reconciliation of Total Cash, Restricted Cash and Equivalents) (Detail) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
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Cash Cash Equivalents And Restricted Cash [Line Items] |  |  |  |  |  |  |
Cash and cash equivalents | [1] | $ 310 |  | $ 217 |  | $ 153 | $ 283
Cash and cash equivalents | [2] | 310 |  | 184 |  |  |
Restricted cash and equivalents | [3],[4] | 55 |  | 84 |  | 188 | 125
Restricted cash and equivalents |  |  |  | 4 |  | 2 | 3
Cash, restricted cash and equivalents shown in the Consolidated Statements of Cash Flows |  | 365 |  | 301 |  | 341 | 408
Virginia Electric and Power Company |  |  |  |  |  |  |
Cash Cash Equivalents And Restricted Cash [Line Items] |  |  |  |  |  |  |
Cash and cash equivalents |  | 160 | [5] | 90 | [5] | 22 | 26
Restricted cash and equivalents | [4],[6] | 46 |  |  |  | 2 |
Cash, restricted cash and equivalents shown in the Consolidated Statements of Cash Flows |  | $ 206 |  | $ 90 |  | $ 24 | $ 26
[1] | At December 31, 2023, 2022 and 2021, Dominion Energy had $33 million, $34 million and $49 million, respectively, of cash and cash equivalents included in assets held for sale.
[2] | See Note 16 for amounts attributable to VIEs.
[3] | At December 31, 2023, 2022 and 2021, Dominion Energy had $4 million, $2 million and $3 million, respectively, of restricted cash and equivalents included in assets held for sale with the remaining balances presented within other current assets in Dominion Energy’s Consolidated Balance Sheets.
[4] | Includes $41 million at VPFS attributable to VIEs at December 31, 2024.
[5] | See Note 16 for amounts attributable to VIEs.
[6] | Restricted cash and equivalents balances are presented within other current assets in Virginia Power’s Consolidated Balance Sheets.

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483467/210-10-45-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-4 + Details
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- Definition Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(9)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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