Operating Revenue (Schedule of Operating Revenue) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Electric sales:
Regulated		$ 1,842	$ 2,112
Nonregulated		389	406
Gas sales:
Regulated		65	116
Nonregulated		118	208
Gas transportation and storage		415	471
Other		92	96
Total operating revenue		2,921	3,409
Virginia Electric and Power Company
Electric sales:
Regulated		1,842	2,112
Gas sales:
Other		48	25
Total operating revenue	[1]	1,890	2,137
Dominion Gas Holdings, LLC
Gas sales:
Regulated		29	57
Nonregulated		1	3
Gas transportation and storage		351	412
NGL revenue		17	29
Other		33	30
Total operating revenue	[2]	$ 431	$ 531

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

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