Commitments and Contingencies (Narrative) (Details) (USD $)	1 Months Ended				6 Months Ended		12 Months Ended			3 Months Ended						6 Months Ended		12 Months Ended	6 Months Ended		1 Months Ended	47 Months Ended	1 Months Ended
	Nov. 30, 2013	Jul. 31, 2013 Unit	Sep. 30, 2011 Party	Jul. 31, 2011	Jun. 30, 2014 Site	Jun. 30, 2013	Dec. 31, 2013	Jun. 30, 2014 Minimum	Jun. 30, 2014 Maximum	Jun. 30, 2014 North Anna	Jun. 30, 2014 Millstone	Jun. 30, 2014 Kewaunee	Jun. 30, 2014 Obligated Payments to Maryland Strategic Energy Investments Fund and Low Income Energy Assistance Programs	Jun. 30, 2014 Third Party and Equity Method Investee	Jun. 30, 2014 Third Party and Equity Method Investee Through 2019	Jun. 30, 2014 Virginia Electric and Power Company Site	Jun. 30, 2013 Virginia Electric and Power Company	Dec. 31, 2013 Virginia Electric and Power Company	Jun. 30, 2014 Dominion Gas Holdings, LLC Site	Jun. 30, 2013 Dominion Gas Holdings, LLC	Jul. 31, 2011 CAA State Group MW	Jun. 30, 2014 CAA	May 31, 2014 CWA Facility	May 31, 2014 CWA Virginia Electric and Power Company Facility	Jun. 30, 2014 Remediation program	Jun. 30, 2014 Breach of Contract Lawsuit Pending Litigation	Jun. 30, 2014 Spent Nuclear Fuel	Dec. 31, 2013 Spent Nuclear Fuel	Jun. 30, 2014 Spent Nuclear Fuel Virginia Electric and Power Company	Dec. 31, 2013 Spent Nuclear Fuel Virginia Electric and Power Company
Investments in and Advances to Affiliates [Line Items]
Number of states under EPA replacement rule																					28
Emissions of fossil fuel fired electric generating units (MW)																					25
Number of groups of affected states																					2
Amount company has spent for emission standards compliance					$ 2,389,000,000	$ 1,937,000,000										$ 1,385,000,000	$ 1,217,000,000		$ 249,000,000	$ 253,000,000		$ 2,000,000
Number of facilities that may be subject to final regulations																							14	11
Number of parties issued UAO			22
Daily civil penalties for non compliance					37,500
Number of former manufactured gas plant sites					17											3			12
Preliminary costs for options under evaluation for site, minimum																									1,000,000
Preliminary costs for options under evaluation for site, maximum																									22,000,000
Maximum period for consideration of CO2 emissions from biomass projects				3 years
Number of coal fired generating units		3
Accrued liability for legal matter																										6,000,000
Other Commitment													48,000,000
Amount to resolve claims for damages										27,000,000	17,000,000	5,000,000
Receivables for spent nuclear fuel-related costs																											92,000,000	79,000,000	60,000,000	50,000,000
Current fee per MWh for electricity paid by civilian nuclear power generators	1
Waste fees recognized							16,000,000											10,000,000
Amount of civil penalty														69,000,000
Exposure under guarantees					4,328,000,000									54,000,000	80,000,000
Annual future contributions								4,000,000	19,000,000
Purchased surety bonds					129,000,000											60,000,000			31,000,000
Authorized issuance of standby letters of credit					$ 115,000,000											$ 18,000,000