Regulatory Matters (Narrative) (Details) (USD $)	6 Months Ended					1 Months Ended			6 Months Ended					1 Months Ended			6 Months Ended	12 Months Ended	3 Months Ended	1 Months Ended	6 Months Ended	1 Months Ended											12 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended
	Jun. 30, 2014		Jun. 30, 2013	Dec. 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	Jun. 30, 2014 Virginia Electric and Power Company		Jun. 30, 2013 Virginia Electric and Power Company	Dec. 31, 2013 Virginia Electric and Power Company		May 31, 2014 Virginia Electric and Power Company Virginia Regulation	Jul. 31, 2013 Virginia Electric and Power Company Virginia Regulation Part	Apr. 30, 2014 Virginia Electric and Power Company Virginia Regulation North Anna	Jun. 30, 2014 Virginia Electric and Power Company Virginia Regulation North Anna	Dec. 31, 2013 Virginia Electric and Power Company Virginia Regulation North Anna	Jun. 30, 2014 Virginia Electric and Power Company Virginia Regulation North Anna Virginia legislation	Apr. 30, 2014 Virginia Electric and Power Company Virginia Regulation Loudoun- Pleasant View Transmission Line kV	Dec. 31, 2014 Virginia Electric and Power Company Virginia Regulation Scenario, Forecast North Anna Virginia legislation	Jun. 30, 2014 Virginia Electric and Power Company Virginia Regulation Rider B Power_Station	May 31, 2014 Virginia Electric and Power Company Virginia Regulation Rider S	May 31, 2014 Virginia Electric and Power Company Virginia Regulation Rider W	Jun. 30, 2014 Virginia Electric and Power Company Virginia Regulation Rider R	Jul. 31, 2014 Virginia Electric and Power Company Virginia Regulation Rider BW Subsequent Event	Apr. 30, 2014 Virginia Electric and Power Company Virginia Regulation Rider C1A	Apr. 30, 2014 Virginia Electric and Power Company Virginia Regulation Rider C2A	Apr. 30, 2014 Virginia Electric and Power Company Virginia Regulation Riders C1A And C2A Program	Jul. 31, 2014 Virginia Electric and Power Company Virginia Regulation Rider T1 Subsequent Event	Dec. 31, 2012 Virginia Electric and Power Company North Carolina Regulation	Apr. 30, 2014 East Ohio Ohio Regulation PIR Program	Dec. 31, 2008 East Ohio Ohio Regulation PIR Program	May 31, 2014 East Ohio Ohio Regulation AMR Program	Dec. 31, 2007 East Ohio Ohio Regulation AMR Program customer	Jul. 31, 2014 East Ohio Ohio Regulation Subsequent Event	Jul. 31, 2017 East Ohio Ohio Regulation Subsequent Event PIPP Plus Program	Jul. 31, 2017 East Ohio Ohio Regulation Subsequent Event UEX Rider	Jul. 31, 2017 East Ohio Ohio Regulation Scenario, Forecast Subsequent Event PIPP Plus Program
Regulatory Matters [Line Items]
ROE								11.40%																							10.20%
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
Amount of requested fuel expense recovery														1,900,000,000
Percentage of deferred fuel balance offered to recover														50.00%
Jurisdictional deferred fuel balance	131,000,000	[1]		0	[1]				131,000,000	[1]		0	[1]	268,000,000
Amount recovered of jurisdictional deferred fuel balance														134,000,000
Number of parts of amendment															2
Number of power stations																						3
Proposed revenue requirement																						13,000,000	244,000,000	135,000,000	84,000,000
Approved revenue requirement																										85,000,000	1,000,000	30,000,000		538,000,000
Approved increase amount																										41,000,000			4,000,000	134,000,000		22,000,000		3,000,000
Approved combined spending cap																													72,000,000
Number of Demand Side Management Programs																													3
KV line																				500
Estimated cost to rebuild transmission line																				31,000,000
Percentage of capitalized costs recovered																70.00%	70.00%
Deferred or capitalized costs	2,389,000,000		1,937,000,000						1,385,000,000		1,217,000,000							577,000,000																		110,000,000
Charges associated with North Anna and offshore wind legislation	287,000,000		0						287,000,000		0								287,000,000		87,000,000
Charges associated with North Anna and offshore wind facilities, net of tax																			191,000,000		57,000,000
Approved increase in annual non-fuel base revenues																															36,000,000
Approved annual base fuel revenues																															14,000,000
Base revenue increase																															22,000,000
Percentage of pipeline replaced																																	20.00%
Estimate revenue requirement																																89,000,000		8,000,000
Number of customers in Ohio																																			1,200,000
Over-recovery of accumulated arrearages																																					82,000,000
Projected deferred program costs																																							96,000,000
Over-recovered balance of accumulated bad debt expense																																						8,000,000
Prospective bad debt expense																																						$ 25,000,000

[1] Primarily reflects deferred fuel expenses for the Virginia jurisdiction of Virginia Power's generation operations.