Operating Revenue (Schedule of Operating Revenue) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Electric sales:
Regulated		$ 2,020	$ 2,026	$ 5,911	$ 5,674
Nonregulated		388	353	1,145	1,527
Gas sales:
Regulated		21	25	168	242
Nonregulated		66	187	361	532
Gas transportation and storage		365	343	1,221	1,138
Other		111	116	321	380
Total operating revenue		2,971	3,050	9,127	9,493
Virginia Electric and Power Company
Electric sales:
Regulated		2,020	2,026	5,911	5,674
Gas sales:
Other		38	27	97	91
Total operating revenue	[1]	2,058	2,053	6,008	5,765
Dominion Gas Holdings, LLC
Gas sales:
Regulated		9	15	87	152
Nonregulated		1	3	5	16
Gas transportation and storage		302	296	1,035	996
NGL revenue		20	54	71	155
Other		33	23	93	69
Total operating revenue	[2]	$ 365	$ 391	$ 1,291	$ 1,388

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

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