Operating Segments (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
After tax net expense	$ 2,407,000,000	$ 2,862,000,000
Corporate and Other
Segment Reporting Information [Line Items]
After tax net expenses	48,000,000	228,000,000
All segments
Segment Reporting Information [Line Items]
After tax net expenses	45,000,000	217,000,000
Dominion Generation
Segment Reporting Information [Line Items]
Net gain on investments	27,000,000
Net gain on investments, after tax	17,000,000
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
Dominion Generation | PJM
Segment Reporting Information [Line Items]
Billing adjustment	17,000,000
Billing adjustment, net of tax	10,000,000
Dominion Generation | Virginia Regulation | Deferred Fuel Costs
Segment Reporting Information [Line Items]
Write off of deferred fuel balances	85,000,000
Write off of deferred fuel balances, net of tax	52,000,000
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
Virginia Electric and Power Company
Segment Reporting Information [Line Items]
After tax net expense	1,612,000,000	1,370,000,000
Virginia Electric and Power Company | Corporate and Other
Segment Reporting Information [Line Items]
After tax net expense	61,000,000
Virginia Electric and Power Company | Dominion Generation | PJM
Segment Reporting Information [Line Items]
Billing adjustment	15,000,000
Billing adjustment, net of tax	9,000,000
Virginia Electric and Power Company | Dominion Generation | Virginia Regulation | Deferred Fuel Costs
Segment Reporting Information [Line Items]
Write off of deferred fuel balances	85,000,000
Write off of deferred fuel balances, net of tax	52,000,000
Dominion Gas Holdings, LLC
Segment Reporting Information [Line Items]
After tax net expense	260,000,000	304,000,000
Dominion Gas Holdings, LLC | Corporate and Other
Segment Reporting Information [Line Items]
After tax net expenses	$ 0	$ 0