Earnings Per Share (Calculation of Our Basic and Diluted EPS) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Earnings Per Share [Abstract]
Net income attributable to Dominion	$ 529		$ 569		$ 1,067		$ 1,266
Average shares of common stock outstanding - Basic (shares)	583.1		579.4		582.2		578.1
Net effect of potentially dilutive securities (shares)	1.5	[1]	0.7	[1]	1.6	[1]	0.7	[1]
Average shares of common stock outstanding - Diluted (shares)	584.6		580.1		583.8		578.8
Earnings Per Common Share - Basic (dollars per share)	$ 0.91		$ 0.98		$ 1.83		$ 2.19
Earnings Per Common Share - Diluted (dollars per share)	$ 0.90		$ 0.98		$ 1.83		$ 2.19

[1] Dilutive securities consist primarily of contingently convertible senior notes and the 2013 Equity Units for 2014 and contingently convertible senior notes for 2013. See Note 14 in this report and Note 17 to the Consolidated Financial Statements in Dominion's and Virginia Power's Annual Report on Form 10-K for the year ended December 31, 2013 for more information.