Operating Segments (Schedule of Segment Reporting Information, by Segment) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Total revenue from external customers		$ 2,921	$ 3,409
Net income attributable to Dominion		524	536
DVP
Segment Reporting Information [Line Items]
Total revenue from external customers		561	569
Dominion Generation
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	1,696	1,992
Dominion Energy
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	663	846
Corporate and Other
Segment Reporting Information [Line Items]
Total revenue from external customers		195	129
Operating Segments | DVP
Segment Reporting Information [Line Items]
Total revenue from external customers		556	564
Net income attributable to Dominion		120	140
Operating Segments | Dominion Generation
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	1,693	1,989
Net income attributable to Dominion	[1]	245	262
Operating Segments | Dominion Energy
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	485	536
Net income attributable to Dominion	[1]	186	227
Operating Segments | Corporate and Other
Segment Reporting Information [Line Items]
Total revenue from external customers		3	(13)
Net income attributable to Dominion		(27)	(93)
Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	(378)	(460)
Intersegment revenue | DVP
Segment Reporting Information [Line Items]
Total revenue from external customers		5	5
Intersegment revenue | Dominion Generation
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	3	3
Intersegment revenue | Dominion Energy
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	178	310
Intersegment revenue | Corporate and Other
Segment Reporting Information [Line Items]
Total revenue from external customers		192	142
Segment Reconciling Items and Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	(194)	(127)
Adjustments/Eliminations
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	184	333
Net income attributable to Dominion	[1]	0	0
Virginia Electric and Power Company
Segment Reporting Information [Line Items]
Total revenue from external customers	[2]	1,890	2,137
Net income attributable to Dominion		263	269
Virginia Electric and Power Company | Operating Segments | DVP
Segment Reporting Information [Line Items]
Total revenue from external customers		557	567
Net income attributable to Dominion		118	140
Virginia Electric and Power Company | Operating Segments | Dominion Generation
Segment Reporting Information [Line Items]
Total revenue from external customers		1,333	1,585
Net income attributable to Dominion		166	190
Virginia Electric and Power Company | Operating Segments | Corporate and Other
Segment Reporting Information [Line Items]
Total revenue from external customers		0	(15)
Net income attributable to Dominion		(21)	(61)
Dominion Gas Holdings, LLC
Segment Reporting Information [Line Items]
Total revenue from external customers	[3]	431	531
Net income attributable to Dominion		98	161
Dominion Gas Holdings, LLC | Operating Segments | Dominion Energy
Segment Reporting Information [Line Items]
Total revenue from external customers		431	531
Net income attributable to Dominion		103	164
Dominion Gas Holdings, LLC | Operating Segments | Corporate and Other
Segment Reporting Information [Line Items]
Total revenue from external customers		0	0
Net income attributable to Dominion		$ (5)	$ (3)

[1] 2015 amounts have been recast to reflect nonregulated retail energy marketing operations in the Dominion Energy segment.

[2] See Note 17 for amounts attributable to affiliates.

[3] See Note 17 for amounts attributable to related parties.