Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net deferred gains (losses) on derivative-hedging activities, tax	$ (33)	$ 41
Changes in unrealized net gains (losses) on investment securities, tax	(10)	(11)
Net derivative (gains) losses-hedging activities, tax	39	(39)
Net realized gains on investment securities, tax	1	12
Net pension and other postretirement benefit costs, tax	(6)	(9)
Virginia Electric and Power Company
Net deferred gains (losses) on derivative-hedging activities, tax	5	2
Changes in unrealized net gains (losses) on investment securities, tax	(1)	(1)
Net derivative (gains) losses-hedging activities, tax	0	0
Net realized gains on investment securities, tax	0	0
Dominion Gas Holdings, LLC
Net deferred gains (losses) on derivative-hedging activities, tax	4	2
Net derivative (gains) losses-hedging activities, tax	2	0
Net pension and other postretirement benefit costs, tax	$ (1)	$ (1)