Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net deferred gains (losses) on derivative-hedging activities, tax	$ 7	$ (59)	$ (26)	$ (19)
Changes in unrealized net gains (losses) on investment securities, tax	(15)	6	(25)	(5)
Changes in unrecognized pension and other postretirement benefit costs, tax	0	3	0	3
Net derivative (gains) losses-hedging activities, tax	28	41	67	2
Net realized gains on investment securities, tax	5	8	6	20
Net pension and other postretirement benefit costs, tax	(6)	(9)	(12)	(18)
Changes in other comprehensive income (loss) from equity method investees, tax	0	1	0	1
Virginia Electric and Power Company
Net deferred gains (losses) on derivative-hedging activities, tax	4	(4)	9	(2)
Changes in unrealized net gains (losses) on investment securities, tax	(3)	1	(4)	0
Net derivative (gains) losses-hedging activities, tax	0	0	(1)	0
Net realized gains on investment securities, tax	1	1	1	1
Dominion Gas Holdings, LLC
Net deferred gains (losses) on derivative-hedging activities, tax	4	(1)	8	1
Net derivative (gains) losses-hedging activities, tax	(2)	0	0	0
Net pension and other postretirement benefit costs, tax	$ 0	$ (1)	$ (1)	$ (2)