Regulatory Matters (Narrative) (Details) (USD $)	3 Months Ended		12 Months Ended					1 Months Ended		3 Months Ended		1 Months Ended							3 Months Ended	1 Months Ended							12 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012	May 31, 2012	Mar. 31, 2010	Dec. 31, 2014		Sep. 30, 2014	May 31, 2014	Nov. 30, 2013 notice	Aug. 31, 2013 motion	Apr. 30, 2014	Jul. 31, 2013 Part	Jan. 31, 2015 MW period	Mar. 31, 2015	Jul. 31, 2014	Jun. 30, 2014	Oct. 31, 2014	Aug. 31, 2014 Program	Dec. 31, 2014		Dec. 31, 2012	Dec. 31, 2015	Feb. 28, 2014	Dec. 31, 2008	Nov. 30, 2014	Dec. 31, 2007 customer	Feb. 27, 2015	Dec. 31, 2016
Regulatory Matters [Line Items]
Jurisdictional deferred fuel balance			$ 79,000,000	[1]	$ 0	[1]				$ 79,000,000	[1]													$ 79,000,000	[1]
Plant construction and other property additions (including nuclear fuel)			5,345,000,000		4,065,000,000		4,145,000,000
Charge recognized			374,000,000		0		0
Charge recognized for cumulative recovery of costs, after tax	191,000,000	193,000,000
Virginia Electric and Power Company
Regulatory Matters [Line Items]
Approved 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
Restoration costs net of tax										28,000,000
Jurisdictional deferred fuel balance			79,000,000	[1]	0	[1]				79,000,000	[1]													79,000,000	[1]
Plant construction and other property additions (including nuclear fuel)			2,911,000,000		2,394,000,000		2,082,000,000
Charge recognized			374,000,000		0		0
Charge recognized for cumulative recovery of costs, after tax	191,000,000
Virginia Electric and Power Company | Virginia Regulation
Regulatory Matters [Line Items]
Approved ROE					10.00%									10.90%
Earned ROE percentage					10.30%									10.25%
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					37,000,000
Peer group floor ROE, percentage					9.89%
Market cost of equity, percentage					10.00%
Requested recovery amount for jurisdictional projected fuel expenses													1,900,000,000
Percentage recovery of total estimated jurisdictional deferred fuel balance													50.00%
Jurisdictional deferred fuel balance													268,000,000
Jurisdictional fuel balance recovered													134,000,000
Percentage of deferred fuel balance												50.00%
Revenue increase (decrease)												300,000,000
Number of motions filed for reconsideration															3
Number of appeals filed with Supreme Court														3
Number of notices withdrawn														2
Virginia Electric and Power Company | Virginia Regulation | Surry Switching Station Transmission Line
Regulatory Matters [Line Items]
KV Line														500
Virginia Electric and Power Company | Virginia Regulation | Surry Switching Station Transmission Line | Minimum
Regulatory Matters [Line Items]
Length of Transmission line														7
Virginia Electric and Power Company | Virginia Regulation | Transmission Line from Skiffes Creek Switching Station to Wheaton Substation
Regulatory Matters [Line Items]
Length of Transmission line														20
KV Line														230
Virginia Electric and Power Company | Virginia Regulation | North Anna
Regulatory Matters [Line Items]
Number of parts of amendment to COL application																	2
Projected amount of capitalized costs recovered, percentage			70.00%													70.00%
Plant construction and other property additions (including nuclear fuel)					577,000,000
Virginia Electric and Power Company | Virginia Regulation | Legislation enacted | North Anna | Other operations and maintenance expense
Regulatory Matters [Line Items]
Charge recognized	374,000,000
Charge recognized for cumulative recovery of costs, after tax	248,000,000
Virginia Electric and Power Company | Virginia Regulation | Subsequent Event
Regulatory Matters [Line Items]
Generation capacity of solar development projects																		20
Estimated project cost once constructed																		47,000,000
Number of test periods																		5
Virginia Electric and Power Company | Virginia Regulation | Subsequent Event | Maximum
Regulatory Matters [Line Items]
Generation capacity of solar development projects																		500
Virginia Electric and Power Company | Virginia Regulation | Subsequent Event | Scenario, Forecast | Deferred Fuel Costs
Regulatory Matters [Line Items]
Write off of prior period deferred fuel costs																			85,000,000
Virginia Electric and Power Company | Virginia Regulation | Rider T1
Regulatory Matters [Line Items]
Revenue increase (decrease)																				134,000,000
Approved revenue requirement																				538,000,000
Virginia Electric and Power Company | Virginia Regulation | Rider S
Regulatory Matters [Line Items]
Proposed revenue requirement																					244,000,000
Virginia Electric and Power Company | Virginia Regulation | Rider W
Regulatory Matters [Line Items]
Proposed revenue requirement													135,000,000
Virginia Electric and Power Company | Virginia Regulation | Rider BW
Regulatory Matters [Line Items]
Proposed revenue requirement																						111,000,000
Virginia Electric and Power Company | Virginia Regulation | Riders C1A and C2A
Regulatory Matters [Line Items]
Proposed revenue requirement																							47,000,000
Number of new energy efficiency programs																							3
Period for cost cap																							5 years
Cost cap amount																							106,000,000
Virginia Electric and Power Company | Virginia Regulation | Rider R
Regulatory Matters [Line Items]
Proposed revenue requirement																					84,000,000
Virginia Electric and Power Company | Virginia Regulation | Rider U
Regulatory Matters [Line Items]
Proposed revenue requirement																						28,000,000
Virginia Electric and Power Company | Virginia Regulation | Rider B
Regulatory Matters [Line Items]
Proposed revenue requirement																					13,000,000
Virginia Electric and Power Company | North Carolina Regulation
Regulatory Matters [Line Items]
Approved ROE																					10.20%					10.20%
Revenue increase (decrease)																										36,000,000
Increase (decrease) in annual base fuel revenues																								17,000,000		(14,000,000)
Total base revenues																										22,000,000
Virginia Electric and Power Company | North Carolina Regulation | Scenario, Forecast
Regulatory Matters [Line Items]
Percentage of deferred fuel balance																																	50.00%
Virginia Electric and Power Company | North Carolina Regulation | Scenario, Forecast | Maximum
Regulatory Matters [Line Items]
Cost cap amount																											17,000,000
East Ohio | Ohio Regulation
Regulatory Matters [Line Items]
Plant construction and other property additions (including nuclear fuel)																				110,000,000
East Ohio | Ohio Regulation | PIR Program
Regulatory Matters [Line Items]
Percentage replacement of pipeline system																													25.00%
Total plant investment																												164,000,000
Cumulative gross plant investment																												674,000,000
Approved revenue requirement																												89,000,000
East Ohio | Ohio Regulation | AMR Program
Regulatory Matters [Line Items]
Revenue increase (decrease)													3,000,000
Approved revenue requirement													8,000,000
Proposed revenue requirement																														8,000,000
Number of customers with automated meter reading technology																															1,200,000
East Ohio | Ohio Regulation | PIPP Plus Program
Regulatory Matters [Line Items]
Refund of overrecovery of accumulated arrearages																				82,000,000
Recovery of projected deferred program costs																				96,000,000
East Ohio | Ohio Regulation | UEX Rider
Regulatory Matters [Line Items]
Elimination of over-recovered balance of accumulated bad debt expense																				8,000,000
Prospective bad debt expense recovered																				25,000,000
East Ohio | Ohio Regulation | Subsequent Event | PIR Program
Regulatory Matters [Line Items]
Total plant investment																																155,000,000
Cumulative gross plant investment																																829,000,000
Approved revenue requirement																																108,000,000
DTI
Regulatory Matters [Line Items]
Amount of refunds provided			$ 10,000,000

[1] Primarily reflects deferred fuel expenses for the Virginia jurisdiction of Dominion's and Virginia Power’s generation operations. See Note 13 for more information. For 2014 and 2013, amount includes approximately $5 million related to DOE claims.