Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net deferred gains (losses) on derivative-hedging activities, tax	$ (59)	$ 47	$ (19)	$ 126
Changes in unrealized net gains (losses) on investment securities, tax	6	(27)	(5)	(28)
Changes in unrecognized pension and other postretirement benefit costs, tax	3	4	3	0
Net derivative (gains) losses-hedging activities, tax	41	6	2	(94)
Net realized gains on investment securities, tax	8	4	20	11
Net pension and other postretirement benefit costs, tax	(9)	(6)	(18)	(12)
Changes in other comprehensive income (loss) from equity method investees, tax	1	3	1	3
Virginia Electric and Power Company
Net deferred gains (losses) on derivative-hedging activities, tax	(4)	0	(2)	0
Changes in unrealized net gains (losses) on investment securities, tax	1	(3)	0	(5)
Net derivative (gains) losses-hedging activities, tax	0	0	0	2
Net realized gains on investment securities, tax	1	0	1	1
Dominion Gas Holdings, LLC
Net deferred gains (losses) on derivative-hedging activities, tax	(1)	12	1	17
Changes in unrecognized pension and other postretirement benefit costs, tax	0	0	0	(1)
Net derivative (gains) losses-hedging activities, tax	0	(2)	0	(4)
Net pension and other postretirement benefit costs, tax	$ (1)	$ 0	$ (2)	$ (1)