Earnings Per Share (Calculation of our Basic and Diluted EPS) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended										12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012		Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011		Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Earnings Per Share [Abstract]
Net income attributable to Dominion	$ (659)	$ 209	$ 258	$ 494	[1]	$ 201	$ 392	$ 336	$ 479	[1]	$ 302		$ 1,408	[2]	$ 2,808	[2]
Average shares of common stock outstanding-Basic											572.9		573.1		588.9
Net effect of potentially dilutive securities											1.0	[3]	1.5	[3]	1.2	[3]
Average shares of common stock outstanding-Diluted											573.9		574.6		590.1
Earnings Per Common Share-Basic (in dollars per share)	$ (1.15)	$ 0.36	$ 0.45	$ 0.86	[1]	$ 0.35	$ 0.69	$ 0.58	$ 0.83	[1]	$ 0.53		$ 2.46	[2]	$ 4.77	[2]
Earnings Per Common Share-Diluted (in dollars per share)	$ (1.15)	$ 0.36	$ 0.45	$ 0.86	[1]	$ 0.35	$ 0.69	$ 0.58	$ 0.82	[1]	$ 0.53		$ 2.45	[2]	$ 4.76	[2]

[1] Revenue and income amounts have been recast to reflect Salem Harbor and State Line as discontinued operations, as discussed in Note 3.

[2] Recast to reflect Salem Harbor and State Line as discontinued operations as described in Note 3 to the Consolidated Financial Statements. EPS amounts reflect the per share impact of the recast.

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