Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Dominion Energy, INC
Net deferred gains (losses) on derivative-hedging activities, tax	$ (17)	$ 7	$ (44)	$ (26)
Changes in unrealized net gains (losses) on investment securities, tax	(18)	(15)	(53)	(25)
Net derivative (gains) losses on derivative-hedging activities, tax	11	28	25	67
Net realized gains on investment securities, tax	2	5	18	6
Net pension and other postretirement benefit costs, tax	(10)	(6)	(18)	(12)
Changes in other comprehensive income (loss) from equity method investees, tax	0	0	(1)	0
Dominion Energy Gas Holdings, LLC
Net deferred gains (losses) on derivative-hedging activities, tax	(7)	4	(1)	8
Net derivative (gains) losses on derivative-hedging activities, tax	7	(2)	0	0
Net pension and other postretirement benefit costs, tax	$ 0	$ 0	$ (1)	$ (1)