Goodwill and Intangible Assets (Goodwill) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 3,086	[1]	$ 3,130	[1]
Asset disposition adjustment	(42)		(44)
Goodwill, Ending Balance	3,044	[1]	3,086	[1]
Dominion Generation
Goodwill [Roll Forward]
Goodwill, Beginning Balance	1,484	[1]	1,503	[1]
Asset disposition adjustment	(32)	[2]	(19)	[2]
Goodwill, Ending Balance	1,452	[1]	1,484	[1]
Dominion Energy
Goodwill [Roll Forward]
Goodwill, Beginning Balance	676	[1]	701	[1]
Asset disposition adjustment	(10)	[3]	(25)	[3]
Goodwill, Ending Balance	666	[1]	676	[1]
DVP
Goodwill [Roll Forward]
Goodwill, Beginning Balance	926	[1]	926	[1]
Asset disposition adjustment	0		0
Goodwill, Ending Balance	926	[1]	926	[1]
Corporate and Other
Goodwill [Roll Forward]
Goodwill, Beginning Balance	0	[1],[4]	0	[1],[4]
Asset disposition adjustment	0	[4]	0	[4]
Goodwill, Ending Balance	0	[1],[4]	0	[1],[4]
Dominion Gas Holdings, LLC
Goodwill [Roll Forward]
Goodwill, Beginning Balance	545	[1]	552	[1]
Asset disposition adjustment	(3)		(7)
Goodwill, Ending Balance	542	[1]	545	[1]
Dominion Gas Holdings, LLC | Dominion Generation
Goodwill [Roll Forward]
Goodwill, Beginning Balance	0	[1]	0	[1]
Asset disposition adjustment	0		0
Goodwill, Ending Balance	0	[1]	0	[1]
Dominion Gas Holdings, LLC | Dominion Energy
Goodwill [Roll Forward]
Goodwill, Beginning Balance	545	[1]	552	[1]
Asset disposition adjustment	(3)	[3]	(7)	[3]
Goodwill, Ending Balance	542	[1]	545	[1]
Dominion Gas Holdings, LLC | DVP
Goodwill [Roll Forward]
Goodwill, Beginning Balance	0	[1]	0	[1]
Asset disposition adjustment	0		0
Goodwill, Ending Balance	0	[1]	0	[1]
Dominion Gas Holdings, LLC | Corporate and Other
Goodwill [Roll Forward]
Goodwill, Beginning Balance	0	[1],[4]	0	[1],[4]
Asset disposition adjustment	0	[4]	0	[4]
Goodwill, Ending Balance	$ 0	[1],[4]	$ 0	[1],[4]

[1] Goodwill amounts do not contain any accumulated impairment losses.

[2] See Note 3 for a discussion of Dominion's dispositions and related goodwill write-offs.

[3] Related to assets sold or contributed to an affiliate or Blue Racer.

[4] Goodwill recorded at the Corporate and Other segment is allocated to the primary operating segments for goodwill impairment testing purposes.