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Income Taxes (Tables)
Nov. 18, 2019
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
   
Dominion Energy Gas
 
Three Months Ended March 31,
 
2019
 
  
2018
   
2019
 
  
2018
   
2019
 
  
2018
 
U.S. statutory rate
 
 
21.0
%
   
21.0
 %  
 
21.0
%
   
21.0
 %  
 
21.0
%
   
21.0
 %
Increases (reductions) resulting from:
   
     
     
     
     
     
 
State taxes, net of federal benefit
 
 
2.2
 
    
4.1
   
 
4.6
 
    
4.5
   
 
3.4
 
    
5.5
 
Investment tax credits
 
 
(1.5
)
   
(0.5
 )  
 
(3.2
)
   
(0.9
 )  
 
—
 
    
—
 
Production tax credits
 
 
(0.8
)
   
(0.6
 )  
 
(1.0
)
   
(0.7
 )  
 
—
 
    
—
 
Reversal of excess deferred income
taxes
 
 
(5.1
)
   
(1.4
 )  
 
(5.0
)
   
(2.0
 )  
 
(0.7
)
   
(0.8
 )
Write-off
of regulatory assets
  
 
(34.1
)
   
—
   
 
—
 
    
—
   
 
—
 
    
—
 
Other, net
 
 
(2.0
)
   
(2.1
 )  
 
0.1
 
    
(0.3
 )  
 
(3.8
)
 (1)
    
(4.0
 )
 (1)
                                                 
Effective tax rate
 
 
(20.3
)%
   
20.5
 %  
 
16.5
%
   
21.6
 %  
 
19.9
%
   
21.7
 %
                                                 
(1)
Includes
(3.6) % relating to the absence of tax on noncontrolling interest in both 2019 and 2018.