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v3.19.3

Income Taxes (Reconciliation of Income Taxes at the U.S. Statutory Federal Income Tax Rate) (Detail) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2017
Effective Income Tax Computation [Line Items] |  |  |  |
U.S. statutory rate |  | 21.00% | 21.00% | 35.00%
Increases (reductions) resulting from: |  |  |  |
State taxes, net of federal benefit |  | 2.20% | 4.10% |
Investment tax credits |  | (1.50%) | (0.50%) |
Production tax credits |  | (0.80%) | (0.60%) |
Reversal of excess deferred income taxes |  | (5.10%) | (1.40%) |
Write-off of regulatory assets |  | (34.10%) |  |
Other, net |  | (2.00%) | (2.10%) |
Effective tax rate |  | (20.30%) | 20.50% |
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 |  | 4.60% | 4.50% |
Investment tax credits |  | (3.20%) | (0.90%) |
Production tax credits |  | (1.00%) | (0.70%) |
Reversal of excess deferred income taxes |  | (5.00%) | (2.00%) |
Other, net |  | 0.10% | (0.30%) |
Effective tax rate |  | 16.50% | 21.60% |
Dominion Energy Gas Holdings, LLC |  |  |  |
Effective Income Tax Computation [Line Items] |  |  |  |
U.S. statutory rate |  | 21.00% | 21.00% |
Increases (reductions) resulting from: |  |  |  |
State taxes, net of federal benefit |  | 3.40% | 5.50% |
Reversal of excess deferred income taxes |  | (0.70%) | (0.80%) |
Other, net | [1] | (3.80%) | (4.00%) |
Effective tax rate |  | 19.90% | 21.70% |
[1] | Includes (3.6) % relating to the absence of tax on noncontrolling interest in both 2019 and 2018.

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