Income Taxes (Tables)

6 Months Ended

Jun. 30, 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
Six Months Ended June 30,	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		0.7			3.8			4.7			4.5			4.2			3.6
Investment tax credits		(3.8	)		(0.9	)		(5.2	)		(1.4	)		—			—
Production tax credits		(1.1	)		(0.7	)		(0.8	)		(0.7	)		—			—
Reversal of excess deferred income     taxes		(6.9	)		(1.5	)		(4.2	)		(2.0	)		(2.8	)		(1.2	)
State legislative change		—			(1.6	)		—			—			—			0.3
Write-off of regulatory assets		(41.6	)		—			—			—			—			—
Other, net		(2.2	)		(2.0	)		0.3			(0.2	)		(0.5	)		(0.2	)
Effective tax rate		(33.9	)%		18.1	%		15.8	%		21.2	%		21.9	%		23.5	%