Operating Segments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			12 Months Ended						3 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2014
Segment Reporting Information [Line Items]
Total operating expenses				$ 9,715		$ 9,804		$ 9,977
Charge recognized				374		0		0
Charge recognized, net of tax	191	193
Charges associated with proposed settlement for ash pond closure costs				121		0		0
Income (loss) from discontinued operations				0	[1]	92	[1]	1,125	[1]
Impairment charge								1,600
Asset disposition adjustment				42		44
Impairment charge after tax			33
Loss from producer services business after tax			24
Loss from discontinued operations, net of tax				0		92		1,125
Corporate and Other
Segment Reporting Information [Line Items]
Total operating expenses				970		452		1,700
Net expenses attributable to other operating segments				544		184		1,500
Income (loss) from discontinued operations						92		1,125
Asset disposition adjustment				0	[2]	0	[2]
Dominion Generation
Segment Reporting Information [Line Items]
Charges associated with proposed settlement for ash pond closure costs				121
Charge related to settlement offer, net of tax				74
Income (loss) from discontinued operations						0		0
Asset disposition adjustment				32	[3]	19	[3]
Net gain on investments						81
Net gain on investments after tax						49
Dominion Generation | Brayton Point Kincaid And Elwood Power Stations
Segment Reporting Information [Line Items]
Loss before income taxes								1,700
Loss from discontinued operations, net of tax								1,100
Dominion Generation | Legislation enacted
Segment Reporting Information [Line Items]
Charge recognized				374
Charge recognized, net of tax				248
Dominion Energy
Segment Reporting Information [Line Items]
Income (loss) from discontinued operations						0		0
Asset disposition adjustment				10	[4]	25	[4]
Loss from operations						182
Loss from operations after tax						109
Impairment charge						55
Impairment charge after tax						33
Loss from producer services business						127
Loss from producer services business after tax						76
Dominion Energy | Legislation enacted
Segment Reporting Information [Line Items]
Charge recognized				319
Charge recognized, net of tax				193
DVP
Segment Reporting Information [Line Items]
Income (loss) from discontinued operations						0		0
Asset disposition adjustment				0		0
Charge related to Biennial Review Order								87
Restoration costs net of tax								53
Brayton Point and Kincaid
Segment Reporting Information [Line Items]
Loss before income taxes			70
Loss from operations after tax			57
Brayton Point and Kincaid | Dominion Generation
Segment Reporting Information [Line Items]
Loss before income taxes						135
Income (loss) from discontinued operations						92
Amount of debt extinguishment						64
Amount of debt extinguishment after tax						38
Impairment charge						48
Long-lived assets impairment charges, net of tax						28
Loss from discontinued operation						17
Loss on discontinued operation, net of tax						18
Asset disposition adjustment						16
Loss from operations						6
Loss from operations after tax						8
Kewaunee | Dominion Generation
Segment Reporting Information [Line Items]
Loss before income taxes								467
Loss from discontinued operations, net of tax								303
State Line and Salem Harbor | Dominion Generation
Segment Reporting Information [Line Items]
Loss before income taxes								49
Loss from discontinued operations, net of tax								22
Virginia Electric and Power Company
Segment Reporting Information [Line Items]
Total operating expenses				5,855		5,215		5,234
Charge recognized				374		0		0
Charge recognized, net of tax	191
Charges associated with proposed settlement for ash pond closure costs				121		0		0
Charge related to settlement offer, net of tax										74
Restoration costs net of tax										28
Virginia Electric and Power Company | Corporate and Other
Segment Reporting Information [Line Items]
Total operating expenses				342		47		51
Virginia Electric and Power Company | Dominion Generation
Segment Reporting Information [Line Items]
Charges associated with proposed settlement for ash pond closure costs				121
Charge related to settlement offer, net of tax				74
Charge related to Biennial Review Order						40
Restoration costs net of tax						28
Virginia Electric and Power Company | Dominion Generation | Legislation enacted
Segment Reporting Information [Line Items]
Charge recognized				374
Charge recognized, net of tax				248
Virginia Electric and Power Company | DVP
Segment Reporting Information [Line Items]
Charge related to Biennial Review Order								87
Restoration costs net of tax								53
Dominion Gas Holdings, LLC
Segment Reporting Information [Line Items]
Total operating expenses				1,047		1,175		927
Net expenses attributable to other operating segments						41
Asset disposition adjustment				3		7
Impairment charge						55
Impairment charge after tax						33
Severance costs						14
Severance costs net of tax						8
Dominion Gas Holdings, LLC | Corporate and Other
Segment Reporting Information [Line Items]
Net expenses attributable to other operating segments				9		49		10
Asset disposition adjustment				0	[2]	0	[2]
Dominion Gas Holdings, LLC | Dominion Generation
Segment Reporting Information [Line Items]
Asset disposition adjustment				0		0
Dominion Gas Holdings, LLC | Dominion Energy
Segment Reporting Information [Line Items]
Asset disposition adjustment				3	[4]	7	[4]
Dominion Gas Holdings, LLC | DVP
Segment Reporting Information [Line Items]
Asset disposition adjustment				$ 0		$ 0

[1] Includes income tax benefit of $43 million and $692 million in 2013 and 2012, respectively. For 2012, includes impairment charges of $1.6 billion related to Brayton Point and Kincaid. See Note 6 for additional information.

[2] Goodwill recorded at the Corporate and Other segment is allocated to the primary operating segments for goodwill impairment testing purposes.

[3] See Note 3 for a discussion of Dominion's dispositions and related goodwill write-offs.

[4] Related to assets sold or contributed to an affiliate or Blue Racer.