Operating Revenue (Operating Revenue) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Electric sales:
Regulated	$ 2,026		$ 2,023		$ 5,674		$ 5,471
Nonregulated	353		704		1,527		1,907
Gas sales:
Regulated	25		32		242		213
Nonregulated	187		159		532		712
Gas transportation and storage	343		329		1,138		1,156
Other	116		185		380		476
Total operating revenue	3,050		3,432		9,493		9,935
Virginia Electric and Power Company
Electric sales:
Regulated	2,026		2,023		5,674		5,471
Gas sales:
Other	27		36		91		79
Total operating revenue	2,053	[1]	2,059	[1]	5,765	[1]	5,550	[1]
Dominion Gas Holdings, LLC
Gas sales:
Regulated	15		22		152		130
Nonregulated	3		3		16		10
Gas transportation and storage	296		280		996		1,011
NGL revenue	54		66		155		204
Other	23		17		69		49
Total operating revenue	$ 391	[2]	$ 388	[2]	$ 1,388	[2]	$ 1,404	[2]

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

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