Operating Segments (Schedule of Segment Reporting Information, by Segment) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Segment Reporting Information [Line Items]
Total revenue from external customers	$ 3,409		$ 3,630
Total operating revenue	3,409		3,630
Net income attributable to Dominion	536		379
Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	0		0
DVP
Segment Reporting Information [Line Items]
Total revenue from external customers	564		502
Total operating revenue	569		504
Net income attributable to Dominion	140		131
DVP | Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	5		2
Dominion Generation
Segment Reporting Information [Line Items]
Total revenue from external customers	2,122		2,260
Total operating revenue	2,148		2,284
Net income attributable to Dominion	282		309
Dominion Generation | Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	26		24
Dominion Energy
Segment Reporting Information [Line Items]
Total revenue from external customers	379		362
Total operating revenue	739		851
Net income attributable to Dominion	207		208
Dominion Energy | Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	360		489
Corporate and Other
Segment Reporting Information [Line Items]
Total revenue from external customers	(13)		(2)
Total operating revenue	129		145
Net income attributable to Dominion	(93)		(269)
Corporate and Other | Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	142		147
Adjustments/Eliminations
Segment Reporting Information [Line Items]
Total revenue from external customers	357		508
Total operating revenue	(176)		(154)
Net income attributable to Dominion	0		0
Adjustments/Eliminations | Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	(533)		(662)
Virginia Electric and Power Company
Segment Reporting Information [Line Items]
Total revenue from external customers	2,137	[1]	1,983	[1]
Total operating revenue	2,137		1,983
Net income attributable to Dominion	269		324
Virginia Electric and Power Company | DVP
Segment Reporting Information [Line Items]
Total operating revenue	567		502
Net income attributable to Dominion	140		134
Virginia Electric and Power Company | Dominion Generation
Segment Reporting Information [Line Items]
Total operating revenue	1,585		1,481
Net income attributable to Dominion	190		189
Virginia Electric and Power Company | Corporate and Other
Segment Reporting Information [Line Items]
Total operating revenue	(15)		0
Net income attributable to Dominion	(61)		1
Dominion Gas Holdings, LLC
Segment Reporting Information [Line Items]
Total revenue from external customers	531	[2]	569	[2]
Total operating revenue	531		569
Net income attributable to Dominion	161		164
Dominion Gas Holdings, LLC | Dominion Energy
Segment Reporting Information [Line Items]
Total operating revenue	531		569
Net income attributable to Dominion	164		166
Dominion Gas Holdings, LLC | Corporate and Other
Segment Reporting Information [Line Items]
Total operating revenue	0		0
Net income attributable to Dominion	$ (3)		$ (2)

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

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