Operating Revenue (Operating Revenue) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Electric sales:
Regulated	$ 2,112		$ 1,951
Nonregulated	406		854
Gas sales:
Regulated	116		147
Nonregulated	208		117
Gas transportation and storage	471		444
Other	96		117
Total operating revenue	3,409		3,630
Virginia Electric and Power Company
Electric sales:
Regulated	2,112		1,951
Gas sales:
Other	25		32
Total operating revenue	2,137	[1]	1,983	[1]
Dominion Gas Holdings, LLC
Gas sales:
Regulated	57		83
Nonregulated	3		9
Gas transportation and storage	412		396
NGL revenue	29		57
Other	30		24
Total operating revenue	$ 531	[2]	$ 569	[2]

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

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