Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net deferred gains (losses) on derivatives-hedging activities, tax	$ 161	$ 5	$ 48
Changes in unrealized net gains (losses) on investment securities, tax	(136)	(68)	(7)
Changes in net unrecognized pension and other postretirement benefit costs, tax	(341)	209	147
Net derivative (gains) losses-hedging activities, tax	(53)	34	28
Net realized (gains) losses on investment securities, tax	35	16	(4)
Net pension and other postretirement benefit costs, tax	(39)	(32)	(25)
Virginia Electric and Power Company
Net deferred gains (losses) on derivatives-hedging activities, tax	(3)	3	3
Changes in unrealized net gains (losses) on investment securities, tax	(13)	(7)	(1)
Net derivative (gains) losses-hedging activities, tax	0	(2)	0
Net realized (gains) losses on investment securities, tax	$ 2	$ 2	$ 0