Operating Segments (Schedule of Segment Reporting Information, by Segment) (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Total revenue from external customers	$ 3,341	$ 3,333	$ 7,398	$ 7,501
Intersegment revenue
Total operating revenue	3,341	3,333	7,398	7,501
Income (loss) from discontinued operations, net of tax		2		(147)
Net income attributable to Dominion	336	1,761	815	1,935
Dominion Virginia Power [Member]
Total revenue from external customers	828	787	1,879	1,790
Intersegment revenue	18	19	113	107
Total operating revenue	846	806	1,992	1,897
Income (loss) from discontinued operations, net of tax
Net income attributable to Dominion	115	112	264	226
Dominion Generation [Member]
Total revenue from external customers	1,760	1,831	3,623	3,809
Intersegment revenue	87	108	157	210
Total operating revenue	1,847	1,939	3,780	4,019
Income (loss) from discontinued operations, net of tax
Net income attributable to Dominion	194	276	492	601
Dominion Energy [Member]
Total revenue from external customers	379	450	1,213	1,300
Intersegment revenue	294	294	502	567
Total operating revenue	673	744	1,715	1,867
Income (loss) from discontinued operations, net of tax
Net income attributable to Dominion	104	86	273	261
Corporate and Other [Member]
Total revenue from external customers	37	(6)	73	34
Intersegment revenue	151	167	294	399
Total operating revenue	188	161	367	433
Income (loss) from discontinued operations, net of tax		2		(147)
Net income attributable to Dominion	(77)	1,287	(214)	847
Adjustments/Eliminations [Member]
Total revenue from external customers	337	271	610	568
Intersegment revenue	(550)	(588)	(1,066)	(1,283)
Total operating revenue	(213)	(317)	(456)	(715)
Income (loss) from discontinued operations, net of tax
Net income attributable to Dominion