Regulatory Matters (Narrative) (Details) (USD $)	3 Months Ended		1 Months Ended			3 Months Ended		1 Months Ended	12 Months Ended	1 Months Ended				12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	May 31, 2012 Virginia Electric and Power Company	Mar. 31, 2010 Virginia Electric and Power Company	Apr. 30, 2008 Virginia Electric and Power Company	Mar. 31, 2014 Virginia Electric and Power Company	Mar. 31, 2013 Virginia Electric and Power Company	Jul. 31, 2013 Virginia Electric and Power Company Virginia Regulation Part	Dec. 31, 2013 Virginia Electric and Power Company Virginia Regulation North Anna	Feb. 28, 2014 Virginia Electric and Power Company Virginia Regulation Rider B	Mar. 31, 2014 Virginia Electric and Power Company Virginia Regulation Rider S	Feb. 28, 2014 Virginia Electric and Power Company Virginia Regulation Rider S	Feb. 28, 2014 Virginia Electric and Power Company Virginia Regulation Rider W	Dec. 31, 2013 East Ohio Ohio Regulation PIR Program	Dec. 31, 2008 East Ohio Ohio Regulation PIR Program	Dec. 31, 2013 DTI	Feb. 28, 2014 DTI
Regulatory Matters [Line Items]
ROE					11.40%
Costs claimed to be unjust and excluded from transmission formula rate				$ 223,000,000
Potential settlement required annual payment for 10 Years						250,000
Settlement payment duration			10 years
Number of power stations										0
Approved revenue requirement										15,000,000		239,000,000	98,000,000
Public Utilities, Approved Rate Increase (Decrease), Amount										3,000,000	9,000,000		15,000,000
Number of parts of amendment								2
Percentage of capitalized costs recovered									70.00%
Deferred or capitalized costs	1,120,000,000	904,000,000				691,000,000	592,000,000		577,000,000
Percentage of pipeline replaced															20.00%
Gross plant investment														164,000,000
Cumulative gross plant investment														674,000,000
Estimate revenue requirement														89,000,000
Amount of refunds																	10,000,000
Expected reduction of DTI revenue																$ 35,000,000