Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net deferred gains (losses) on derivative-hedging activities, tax	$ 36	$ 43	$ 163	$ 21
Changes in unrealized net gains (losses) on investment securities, tax	(2)	(29)	(30)	(80)
Changes in unrecognized pension and other postretirement benefit costs, tax	0	(12)	0	(160)
Net derivative (gains) losses-hedging activities, tax	22	4	(72)	(35)
Net realized (gains) losses on investment securities, tax	13	5	24	28
Net pension and other postretirement benefit costs, tax	(6)	(9)	(18)	(29)
Changes in other comprehensive income (loss) from equity method investees, tax	0	0	3	0
Virginia Electric and Power Company
Net deferred gains (losses) on derivative-hedging activities, tax	0	(1)	0	(3)
Changes in unrealized net gains (losses) on investment securities, tax	(1)	(2)	(6)	(7)
Net derivative (gains) losses-hedging activities, tax	0	0	2	0
Net realized (gains) losses on investment securities, tax	2	0	3	1
Dominion Gas Holdings, LLC
Net deferred gains (losses) on derivative-hedging activities, tax	4	13	22	(30)
Changes in unrecognized pension and other postretirement benefit costs, tax	0	0	0	(9)
Net derivative (gains) losses-hedging activities, tax	(2)	(2)	(7)	(3)
Net pension and other postretirement benefit costs, tax	$ (1)	$ (1)	$ (2)	$ (3)