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Income Taxes (Tables) | 9 Months Ended
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Sep. 30, 2023
Income Tax Disclosure [Abstract] |
Effective Income Tax | For continuing operations, including noncontrolling interests, the statutory U.S. federal income tax rate reconciles to the Companies’ effective income tax rate as follows:
|  | Dominion Energy |  |  | Virginia Power |
Nine Months Ended September 30, |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
U.S. statutory rate |  |  | 21.0 | % |  |  | 21.0 | % |  |  | 21.0 | % |  |  | 21.0 | %
Increases (reductions) resulting from: |  |  |  |  |  |  |  |  |  |  |  |
Recognition of taxes - sale of subsidiary stock |  |  | — |  |  |  | 28.4 |  |  |  |  |  |  |
State taxes, net of federal benefit |  |  | 3.9 |  |  |  | 13.1 |  |  |  | 4.6 |  |  |  | 4.4 |
Investment tax credits |  |  | (3.2 | ) |  |  | (23.6 | ) |  |  | (0.3 | ) |  |  | (8.9 | )
Production tax credits |  |  | (0.6 | ) |  |  | (2.6 | ) |  |  | (0.9 | ) |  |  | (1.0 | )
Reversal of excess deferred income taxes |  |  | (2.6 | ) |  |  | (15.6 | ) |  |  | (2.6 | ) |  |  | (3.7 | )
Changes in state deferred taxes associated with assets held for sale |  |  | 1.3 |  |  |  | 1.6 |  |  |  |  |  |  |
AFUDC - equity |  |  | (0.1 | ) |  |  | (1.6 | ) |  |  | — |  |  |  | (0.8 | )
Other, net |  |  | (0.9 | ) |  |  | (1.6 | ) |  |  | (0.3 | ) |  |  | 0.5 |
Effective tax rate |  |  | 18.8 | % |  |  | 19.1 | % |  |  | 21.5 | % |  |  | 11.5 | %

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 12 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-12 + Details
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