Significant Financing Transactions - (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended			3 Months Ended							1 Months Ended
	Jan. 31, 2013	Mar. 31, 2013	Mar. 31, 2012	Jan. 31, 2013 7.83 percent Debentures due 12/01/2027	Mar. 31, 2013 Convertible Debt	Mar. 31, 2013 Virginia Electric and Power Company	Mar. 31, 2012 Virginia Electric and Power Company	Jan. 31, 2013 1.2% Senior Notes That Mature In 2018 Virginia Electric and Power Company	Jan. 31, 2013 4% Senior Notes That Mature In 2043 Virginia Electric and Power Company	Mar. 31, 2013 2.75% Senior Notes that mature in 2023 Virginia Electric and Power Company	Apr. 25, 2013 Secured Senior Note, 7.33%, due 2020 Subsequent Event	Apr. 25, 2013 Secured Senior Note, 7.33%, due 2020 Subsequent Event Scenario, Forecast	Mar. 31, 2013 2.5% Bonds That Mature In 2031 Virginia Electric and Power Company
Credit facility						$ 120
Senior Notes								250	500	500
Senior notes interest rates (percentage)				7.83%				1.20%	4.00%	2.75%	7.33%		2.50%
Repayments of Long-term Debt		712	104			451	1					186
Virginia Solid Waste and Sewage Disposal Revenue Bonds													50
Contingent convertible senior notes					72
Conversion rate, shares of common stock per $1,000 principal amount of senior notes (in shares)					29.5147
Principal amount of senior notes					$ 1,000
Conversion rate, shares of common stock per $1,000 principal amount of senior notes, conversion price					$ 33.88
Debt Instrument, Convertible, Number of Equity Instruments					900,000
Average Trading Price Principal Amount Of Senior Notes (percentage)					120.00%
Minimum Consecutive Trading Days					20 days
Maximum Consecutive Trading Days					30 days
Debt conversion converted instrument amount					10
Unsecured junior subordinated debentures				258
Number of units redeemed	250,000
Dominion Resources Capital Trust I capital securities	$ 250
Interest rate for the Dominion Resources Capital Trust I securities	7.83%
Redemption price of the capital security	$ 1,020