Operating Revenue (Operating Revenue) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011		Sep. 30, 2012	Sep. 30, 2011
Electric sales:
Regulated	$ 2,046	$ 2,136		$ 5,495	$ 5,594
Nonregulated	739	857		2,122	2,465
Gas sales:
Regulated	34	25		166	208
Nonregulated	177	281		740	1,220
Gas transportation and storage	297	291		1,007	1,151
Other	118	155		396	378
Total operating revenue	3,411	3,745	[1]	9,926	11,016	[1]
Virginia Electric and Power Company
Electric sales:
Regulated	2,046	2,136		5,495	5,594
Gas sales:
Other	40	41		101	97
Total operating revenue	$ 2,086	$ 2,177		$ 5,596	$ 5,691

[1] Dominion's Consolidated Statements of Income for the three and nine months ended September 30, 2011 have been recast to reflect Salem Harbor and State Line as discontinued operations, as discussed in Note 3.