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v3.25.2

Income Taxes (Reconciliation of Income Taxes at the U.S. Statutory Federal Income Tax Rate) (Detail) | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
Effective Income Tax Computation [Line Items] |  |
U.S. statutory rate | 21.00% | 21.00%
Increases (reductions) resulting from: |  |
State taxes, net of federal benefit | 4.70% | 2.80%
Investment tax credits | (2.50%) | (1.80%)
Production tax credits | (4.90%) | (3.00%)
Reversal of excess deferred income taxes | (1.70%) | (3.20%)
Qualified nuclear decommissioning trust net gains (losses) | 2.00% | 6.00%
Remeasurements and settlements of uncertain tax positions | (1.60%) |
AFUDC - equity | (0.80%) | (0.90%)
Absence of tax on noncontrolling interest | (1.60%) |
Other, net | (0.10%) | 0.80%
Effective tax rate | 14.50% | 21.70%
Virginia Electric and Power Company |  |
Effective Income Tax Computation [Line Items] |  |
U.S. statutory rate | 21.00% | 21.00%
Increases (reductions) resulting from: |  |
State taxes, net of federal benefit | 4.40% | 4.40%
Investment tax credits | (0.80%) | (0.80%)
Production tax credits | (4.10%) | (2.00%)
Reversal of excess deferred income taxes | (1.70%) | (1.70%)
AFUDC - equity | (1.00%) | (0.60%)
Absence of tax on noncontrolling interest | (2.30%) |
Other, net | (0.10%) | 1.00%
Effective tax rate | 15.40% | 21.30%

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