Operating Revenue (Operating Revenue) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Electric sales:
Regulated	$ 1,697		$ 1,687		$ 3,648		$ 3,448
Nonregulated	320		545		1,174		1,203
Gas sales:
Regulated	70		49		217		181
Nonregulated	228		208		345		553
Gas transportation and storage	351		360		795		827
Other	147		131		264		291
Total operating revenue	2,813		2,980		6,443		6,503
Virginia Electric and Power Company
Electric sales:
Regulated	1,697		1,687		3,648		3,448
Gas sales:
Other	32		23		64		43
Total operating revenue	1,729	[1]	1,710	[1]	3,712	[1]	3,491	[1]
Dominion Gas Holdings, LLC
Gas sales:
Regulated	54		34		137		108
Nonregulated	4		4		13		7
Gas transportation and storage	304		312		700		731
NGL revenue	44		66		101		138
Other	22		14		46		32
Total operating revenue	$ 428	[2]	$ 430	[2]	$ 997	[2]	$ 1,016	[2]

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

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