Operating Revenue (Schedule of Operating Revenue) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Electric sales:
Regulated		$ 1,718	$ 1,779	$ 3,560	$ 3,891
Nonregulated		335	351	724	757
Gas sales:
Regulated		26	31	91	147
Nonregulated		54	87	172	295
Gas transportation and storage		369	385	784	856
Other		96	114	188	210
Total operating revenue		2,598	2,747	5,519	6,156
Virginia Electric and Power Company
Electric sales:
Regulated		1,718	1,779	3,560	3,891
Gas sales:
Other		58	34	106	59
Total operating revenue	[1]	1,776	1,813	3,666	3,950
Dominion Gas Holdings, LLC
Gas sales:
Regulated		12	21	41	78
Nonregulated		6	1	7	4
Gas transportation and storage		301	321	652	733
NGL revenue		9	22	26	51
Other		40	30	73	60
Total operating revenue	[2]	$ 368	$ 395	$ 799	$ 926

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

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