Income Taxes (Tables)

9 Months Ended

Sep. 30, 2017

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
Nine Months Ended September 30,	2017			2016			2017			2016			2017			2016
U.S. statutory rate		35.0	%		35.0	%		35.0	%		35.0	%		35.0	%		35.0	%
Increases (reductions) resulting from:
State taxes, net of federal benefit		2.9			3.7			3.7			3.9			2.7			0.8
Investment tax credits		(5.7	)		(10.4	)		(0.8	)		—			—			—
Production tax credits		(0.7	)		(0.8	)		(0.5	)		(0.5	)		—			—
State legislative change		—			(0.8	)		—			—			—			—
AFUDC - equity		(1.3	)		(0.7	)		(0.6	)		(0.6	)		(0.8	)		(0.1	)
Other, net		(2.6	)		(1.4	)		0.2			0.1			(0.1	)		0.5
Effective tax rate		27.6	%		24.6	%		37.0	%		37.9	%		36.8	%		36.2	%