Regulatory Matters (Narrative) (Details) (USD $)	12 Months Ended			1 Months Ended		3 Months Ended	12 Months Ended					1 Months Ended		12 Months Ended	1 Months Ended					12 Months Ended	1 Months Ended												1 Months Ended		12 Months Ended	1 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	May 31, 2012 Virginia Electric and Power Company	Mar. 31, 2010 Virginia Electric and Power Company	Dec. 31, 2013 Virginia Electric and Power Company	Dec. 31, 2013 Virginia Electric and Power Company	Dec. 31, 2012 Virginia Electric and Power Company	Dec. 31, 2011 Virginia Electric and Power Company	Sep. 01, 2008 Virginia Electric and Power Company Project	Jul. 31, 2008 Virginia Electric and Power Company Project	Nov. 30, 2013 Virginia Electric and Power Company Virginia Regulation	May 31, 2013 Virginia Electric and Power Company Virginia Regulation	Dec. 31, 2013 Virginia Electric and Power Company Virginia Regulation	Oct. 31, 2013 Virginia Electric and Power Company Loudoun- Pleasant View Transmission Virginia Regulation kV	Nov. 30, 2013 Virginia Electric and Power Company Surry Switching Station Transmission Line Virginia Regulation kV	Nov. 30, 2013 Virginia Electric and Power Company Transmission Line from Skiffes Creek Switching Station to Wheaton Substation Virginia Regulation kV mi	Sep. 30, 2013 Virginia Electric and Power Company Bremo Power Station Virginia Regulation MW	Jul. 31, 2013 Virginia Electric and Power Company North Anna Virginia Regulation Part	Dec. 31, 2013 Virginia Electric and Power Company North Anna Virginia Regulation	Nov. 30, 2013 Virginia Electric and Power Company Minimum Surry Switching Station Transmission Line Virginia Regulation mi	Jun. 30, 2013 Virginia Electric and Power Company Rider B Virginia Regulation	Nov. 30, 2013 Virginia Electric and Power Company Rider BW Virginia Regulation	Jun. 30, 2013 Virginia Electric and Power Company Rider S Virginia Regulation	May 31, 2013 Virginia Electric and Power Company Rider W Virginia Regulation	Aug. 31, 2013 Virginia Electric and Power Company Rider C1A Virginia Regulation	Aug. 31, 2013 Virginia Electric and Power Company Rider C2A Virginia Regulation	May 31, 2013 Virginia Electric and Power Company Rider T1 Virginia Regulation	Jul. 31, 2008 Virginia Electric and Power Company 1.5% Incentive rate for projects Project	Jul. 31, 2008 Virginia Electric and Power Company 1.25% Incentive rate for projects Project	Dec. 31, 2013 Virginia Electric and Power Company Other Current Liabilities Virginia Regulation	Dec. 31, 2013 Virginia Electric and Power Company Noncurrent Regulatory Liability Virginia Regulation	Nov. 30, 2013 East Ohio PIR Program Ohio Regulation	Feb. 28, 2013 East Ohio PIR Program Ohio Regulation	Dec. 31, 2008 East Ohio PIR Program Ohio Regulation mi	Mar. 31, 2013 East Ohio PIPP Plus Program Ohio Regulation	Mar. 31, 2013 East Ohio PIPP Plus Program Ohio Regulation Scenario, Forecast	Dec. 31, 2013 DTI
Regulatory Matters [Line Items]
Approved ROE							11.40%					10.90%		10.00%
Number of electric transmission projects										11	11																		4	7
Incentive for 4 electric transmission enhancement projects							1.50%
Incentive for 7 electric transmission enhancement projects							1.25%
Number of electric transmission projects cancelled										1
Estimated cost of project abandonment							$ 7,000,000
Number of transmission projects approved										10
Estimated cost for electric transmission projects							857,000,000
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
Earned ROE percentage												10.25%		10.30%
Basis points below authorized ROE												0.50%
Amount of deferred recovery costs authorized												23,000,000
Amount of revenue sufficiency												280,000,000
Charge related to Biennial Review Order														55,000,000
Restoration costs net of tax						28,000,000								37,000,000
Peer group floor ROE, percentage														9.89%
Market cost of equity, percentage														10.00%
Proposed increase decrease revenue requirement													162,000,000
Approved fuel factor rate												0.02942
Requested fuel factor rate												0.02572
Amount of expected reduction in anticipated fuel recoveries												140,000,000
Liabilities related to fuel recoveries																															24,000,000	85,000,000
Proposed revenue requirement																						16,000,000		248,000,000	101,000,000			404,000,000
Proposed revenue requirement																							101,000,000			1,000,000	35,000,000
Capacity of Electricity (in Megawatts)																		227
Expected cost of proposed conversion																		53,000,000
Number of parts of amendment to COL application																			2
Period after completion of seismic assessment to submit motion to reopen proceeding																				60 days
Percentage of development costs incurred that are recoverable through future rate adjustment clause																				30.00%
Plant construction and other property additions (including nuclear fuel)	4,104,000,000	4,145,000,000	3,652,000,000				2,394,000,000	2,082,000,000	1,885,000,000											570,000,000
Projected amount of capitalized costs recovered, percentage																				70.00%
KV Line															500	500	230
Length of Transmission line																	20				7
Percentage replacement of pipeline system																																			20.00%
Miles of pipeline identified to be replaced																																			4,100
Period for pipeline replacement																																			25 years
Total plant investment																																	170,000,000	148,000,000
Cumulative gross plant investment																																	681,000,000	511,000,000
Approved revenue requirement																																	90,000,000	67,000,000
Refund of overrecovery of accumulated arrearages																																				91,000,000
Recovery of projected deferred program costs																																					54,000,000
Amount that agreement could reduce revenues																																						$ 35,000,000