Operating Segments (Narrative) (Details) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Segment Reporting Information [Line Items]
Charge associated with North Anna and offshore wind legislation					$ 330,000,000		$ 0
One time charge related to implementation of depreciation study					38,000,000
One time charge related to implementation of depreciation study, net of tax					23,000,000
Loss from discontinued operations	0	[1]	23,000,000	[1]	0	[1]	92,000,000	[1]
Impairment of merchant generation assets					0		48,000,000
After tax net expense	2,129,000,000		2,398,000,000		7,410,000,000		7,423,000,000
Corporate and Other
Segment Reporting Information [Line Items]
After tax net expenses					446,000,000		148,000,000
All segments
Segment Reporting Information [Line Items]
After tax net expenses					435,000,000		144,000,000
Severance pay and other benefit costs							28,000,000
Severance pay and other benefit costs, net of tax							17,000,000
Dominion Energy
Segment Reporting Information [Line Items]
Net loss							130,000,000
After tax net loss							74,000,000
Impairment of merchant generation assets							55,000,000
Impairment charge, net of tax							33,000,000
Loss related to producer service business							75,000,000
Loss related to producer service business, net of tax							41,000,000
Dominion Energy | Virginia legislation
Segment Reporting Information [Line Items]
Charge associated with North Anna and offshore wind legislation					319,000,000
Charges associated with North Anna and offshore wind facilities, net of tax					193,000,000
Dominion Generation
Segment Reporting Information [Line Items]
Loss related to restructuring of producer services					47,000,000
Restructuring after tax					33,000,000
Net loss					147,000,000
After tax net loss					90,000,000
Net gain (loss) on sale					100,000,000
Net gain (loss) on sale, after tax					57,000,000
Write off of goodwill					31,000,000
Net gain on investments					53,000,000		66,000,000
Net gain on investments, after tax					33,000,000		40,000,000
Gain on sale of investments							35,000,000
Gain on sale of investments, net of tax							25,000,000
Dominion Generation | Virginia legislation
Segment Reporting Information [Line Items]
Charge associated with North Anna and offshore wind legislation					330,000,000
Charges associated with North Anna and offshore wind facilities, net of tax					219,000,000
Brayton Point and Kincaid | Dominion Generation
Segment Reporting Information [Line Items]
Net loss							6,000,000
After tax net loss							8,000,000
Net gain (loss) on sale							(17,000,000)
Net gain (loss) on sale, after tax							(18,000,000)
Write off of goodwill							16,000,000
Net loss from discontinued operations, before income tax							135,000,000
Loss from discontinued operations							92,000,000
Amount of debt extinguishment							64,000,000
Amount of debt extinguishment, net of tax							38,000,000
Impairment of long-lived assets to be disposed of							48,000,000
Impairment of long lived assets to be disposed of, net of tax							28,000,000
Virginia Electric and Power Company
Segment Reporting Information [Line Items]
Charge associated with North Anna and offshore wind legislation					330,000,000		0
After tax net expense	1,459,000,000		1,380,000,000		4,353,000,000		3,878,000,000
Virginia Electric and Power Company | Corporate and Other
Segment Reporting Information [Line Items]
After tax net expense					235,000,000		5,000,000
Virginia Electric and Power Company | All segments
Segment Reporting Information [Line Items]
After tax net expense					239,000,000
Virginia Electric and Power Company | Dominion Generation
Segment Reporting Information [Line Items]
One time charge related to implementation of depreciation study					38,000,000
One time charge related to implementation of depreciation study, net of tax					23,000,000
Virginia Electric and Power Company | Dominion Generation | Virginia legislation
Segment Reporting Information [Line Items]
Charge associated with North Anna and offshore wind legislation					330,000,000
Charges associated with North Anna and offshore wind facilities, net of tax					219,000,000
Dominion Gas Holdings, LLC
Segment Reporting Information [Line Items]
Impairment of merchant generation assets							55,000,000
Impairment charge, net of tax							33,000,000
Severance pay and other benefit costs							14,000,000
Severance pay and other benefit costs, net of tax							8,000,000
After tax net expense	214,000,000		171,000,000		792,000,000		875,000,000
Dominion Gas Holdings, LLC | Corporate and Other
Segment Reporting Information [Line Items]
After tax net expenses					$ 0		$ 41,000,000

[1] Includes income tax expense of $6 million for the three months ended September 30, 2013 and income tax benefit of $43 million for the nine months ended September 30, 2013.