Operating Revenue (Operating Revenue) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Electric sales:
Regulated		$ 1,779	$ 1,697	$ 3,891	$ 3,648
Nonregulated		351	320	757	1,174
Gas sales:
Regulated		31	70	147	217
Nonregulated		87	228	295	345
Gas transportation and storage		385	351	856	795
Other		114	147	210	264
Total operating revenue		2,747	2,813	6,156	6,443
Virginia Electric and Power Company
Electric sales:
Regulated		1,779	1,697	3,891	3,648
Gas sales:
Other		34	32	59	64
Total operating revenue	[1]	1,813	1,729	3,950	3,712
Dominion Gas Holdings, LLC
Gas sales:
Regulated		21	54	78	137
Nonregulated		1	4	4	13
Gas transportation and storage		321	304	733	700
NGL revenue		22	44	51	101
Other		30	22	60	46
Total operating revenue	[2]	$ 395	$ 428	$ 926	$ 997

[1] See Note 18 for amounts attributable to affiliates.

[2] See Note 18 for amounts attributable to related parties.