Earnings Per Share (Calculation of Our Basic and Diluted EPS) (Details) (USD $) In Millions, except Per Share data	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Earnings Per Share
Net income attributable to Dominion	$ 336		$ 1,761		$ 815		$ 1,935
Average shares of common stock outstanding - Basic	573.4		590.4		576.6		595.1
Net effect of potentially dilutive securities	1.8	[1]	1.0	[1]	1.3	[1]	1.0	[1]
Average shares of common stock outstanding - Diluted	575.2		591.4		577.9		596.1
Earnings Per Common Share - Basic	$ 0.59		$ 2.98		$ 1.41		$ 3.25
Earnings Per Common Share - Diluted	$ 0.58		$ 2.98		$ 1.41		$ 3.25

[1] Potentially dilutive securities consist of options, goal-based stock and contingently convertible senior notes.