Earnings Per Share (Calculation of Our Basic and Diluted EPS) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Earnings Per Share [Abstract]
Net income attributable to Dominion	$ 202		$ 258	[1]	$ 697		$ 752
Average shares of common stock outstanding - Basic (shares)	578,100,000		572,000,000		577,300,000		571,300,000
Net effect of potentially dilutive securities (shares)	800,000	[2]	1,100,000	[2]	900,000	[2]	1,200,000	[2]
Average shares of common stock outstanding - Diluted (shares)	578,900,000		573,100,000		578,200,000		572,500,000
Earnings Per Common Share - Basic (dollars per share)	$ 0.35		$ 0.45	[1]	$ 1.21		$ 1.32
Earnings Per Common Share - Diluted (dollars per share)	$ 0.35		$ 0.45	[1]	$ 1.21		$ 1.31
Potentially dilutive securities excluded from computation of earnings per share (shares)					0		0

[1] Recast to reflect Brayton Point and Kincaid as discontinued operations, as discussed in Note 3.

[2] Dilutive securities consist primarily of contingently convertible senior notes. See Note 14 in this report for more information.