Operating Segments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended				9 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012		Sep. 30, 2012
Segment Reporting Information [Line Items]
Loss from discontinued operations	$ (70)	[1]	$ (32)	[1],[2]	$ (69)	[1]	$ (42)	[1]
Severance pay and other					28
Severance after tax					17
Loss from discontinued operations	(70)		(32)	[2]	(69)		(42)
Corporate and Other
Segment Reporting Information [Line Items]
After tax net expenses					134		96
Loss from discontinued operations	(70)	[3]	(32)	[3]	(69)	[3]	(42)	[3]
All segments
Segment Reporting Information [Line Items]
After tax net expenses					131
Severance pay and other					19
Severance after tax					12
Dominion Generation
Segment Reporting Information [Line Items]
Net gain on investments					51
Net gain on invesments, after tax					31
Loss from discontinued operations	0	[3]	0	[3]	0	[3]	0	[3]
DVP
Segment Reporting Information [Line Items]
Restoration costs									74
Restortation costs, net of tax									45
Loss from discontinued operations	0		0		0		0
Dominion Energy
Segment Reporting Information [Line Items]
Net loss					107
After tax net loss					57
Impairment charge for certain natural gas infrastructure facilities					55
Impairment charge for certain natural gas infrastructure facilities, net of tax					33
Loss related to restructuring of producer services					52
Restructuring after tax					24
Severance pay and other					9
Severance after tax					5
Brayton Point and Kincaid | Dominion Generation
Segment Reporting Information [Line Items]
Benefit from discontinued operations					118
Benefit from discontinued operations, net of tax					69
Debt extinquishment and other costs					64
Debt extinguishment and other costs, after tax					38
Impairment of long-lived assets to be disposed of					48
Impairment of long lived assets to be disposed of, net of tax					28
Net loss from discontinued operations, before income tax					6		48
Loss from discontinued operations					3
Loss from discontinued operations							25
State Line and Salem Harbor | Dominion Generation
Segment Reporting Information [Line Items]
Net loss from discontinued operations, before income tax							30
Loss from discontinued operations							17
Virginia Electric and Power Company | Corporate and Other
Segment Reporting Information [Line Items]
After tax net expenses					$ 5		$ 44

[1] Includes income tax benefit of $49 million and $26 million for the three months ended June 30, 2013 and 2012, respectively, and $49 million and $36 million for the six months ended June 30, 2013 and 2012, respectively.

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

[3] 2012 amounts have been recast to reflect Brayton Point and Kincaid as discontinued operations, as discussed in Note 3.