Operating Segments (Schedule of Segment Reporting Information, by Segment) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Total revenue from external customers	$ 3,803	$ 3,950	$ 11,201	$ 11,451
Intersegment revenue	0	0	0	0
Total operating revenue	3,803	3,950	11,201	11,451
Loss from discontinued operations, net of tax	0	0	0	(147)
Net income (loss) attributable to Dominion	392	575	1,207	2,510
Dominion Virginia Power [Member]
Total revenue from external customers	922	907	2,801	2,697
Intersegment revenue	21	16	134	123
Total operating revenue	943	923	2,935	2,820
Loss from discontinued operations, net of tax				0
Net income (loss) attributable to Dominion	125	107	389	333
Dominion Generation [Member]
Total revenue from external customers	2,142	2,312	5,765	6,121
Intersegment revenue	114	114	271	324
Total operating revenue	2,256	2,426	6,036	6,445
Loss from discontinued operations, net of tax				0
Net income (loss) attributable to Dominion	394	487	886	1,088
Dominion Energy [Member]
Total revenue from external customers	290	367	1,503	1,667
Intersegment revenue	341	339	843	906
Total operating revenue	631	706	2,346	2,573
Loss from discontinued operations, net of tax				0
Net income (loss) attributable to Dominion	95	92	368	353
Corporate and Other [Member]
Total revenue from external customers	23	(6)	96	28
Intersegment revenue	149	172	443	571
Total operating revenue	172	166	539	599
Loss from discontinued operations, net of tax				(147)
Net income (loss) attributable to Dominion	(222)	(111)	(436)	736
Adjustments/Eliminations [Member]
Total revenue from external customers	426	370	1,036	938
Intersegment revenue	(625)	(641)	(1,691)	(1,924)
Total operating revenue	(199)	(271)	(655)	(986)
Loss from discontinued operations, net of tax				0
Net income (loss) attributable to Dominion	$ 0	$ 0	$ 0	$ 0