Operating Segments (Schedule of Segment Reporting Information, by Segment) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Total revenue from external customers	$ 3,492	$ 4,057
Intersegment revenue	0	0
Total operating revenue	3,492	4,057
Net Income (Loss) Attributable to Parent	494	479
Dominion Virginia Power
Total revenue from external customers	930	1,051
Intersegment revenue	63	95
Total operating revenue	993	1,146
Net Income (Loss) Attributable to Parent	166	149
Dominion Generation
Total revenue from external customers	1,675	1,863
Intersegment revenue	76	70
Total operating revenue	1,751	1,933
Net Income (Loss) Attributable to Parent	223	298
Dominion Energy
Total revenue from external customers	616	834
Intersegment revenue	200	208
Total operating revenue	816	1,042
Net Income (Loss) Attributable to Parent	149	169
Corporate and Other
Total revenue from external customers	39	36
Intersegment revenue	149	143
Total operating revenue	188	179
Net Income (Loss) Attributable to Parent	(44)	(137)
Adjustments/ Eliminations
Total revenue from external customers	232	273
Intersegment revenue	(488)	(516)
Total operating revenue	(256)	(243)
Net Income (Loss) Attributable to Parent	$ 0	$ 0