Quarterly Financial and Common Stock Data (Unaudited) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended	3 Months Ended			12 Months Ended			3 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Sep. 30, 2012 Kewaunee	Jun. 30, 2012 Virginia Electric and Power Company	Dec. 31, 2011 Virginia Electric and Power Company	Dec. 31, 2012 Virginia Electric and Power Company	Dec. 31, 2011 Virginia Electric and Power Company	Dec. 31, 2012 Dominion Generation	Dec. 31, 2012 Brayton Point Kincaid And Elwood Power Stations Dominion Generation
Impairment charge		$ 2,100							$ 1,000
Impairment and other charges			281
Asset impairment, net of tax	139				139		139	139
Restoration costs net of tax				$ 42		$ 53	$ 59