Operating Segments (Schedule of Segment Reporting Information, by Segment) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Segment Reporting Information [Line Items]
Total revenue from external customers	$ 3,050		$ 3,432		$ 9,493		$ 9,935
Total operating revenue	3,050		3,432		9,493		9,935
Loss from discontinued operations	0		(23)		0		(92)
Net income attributable to Dominion	529		569		1,067		1,266
Intersegment Revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	0		0		0		0
DVP
Segment Reporting Information [Line Items]
Total revenue from external customers	480	[1]	469	[1]	1,425	[1]	1,366	[1]
Total operating revenue	484	[1]	471	[1]	1,438	[1]	1,372	[1]
Loss from discontinued operations			0	[1]			0	[1]
Net income attributable to Dominion	119	[1]	121	[1]	366	[1]	349	[1]
DVP | Intersegment Revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	4	[1]	2	[1]	13	[1]	6	[1]
Dominion Generation
Segment Reporting Information [Line Items]
Total revenue from external customers	1,985	[1]	2,337	[1]	5,936	[1]	6,365	[1]
Total operating revenue	1,996	[1]	2,343	[1]	5,984	[1]	6,415	[1]
Loss from discontinued operations			0	[1]			0	[1]
Net income attributable to Dominion	326	[1]	340	[1]	794	[1]	779	[1]
Dominion Generation | Intersegment Revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	11	[1]	6	[1]	48	[1]	50	[1]
Dominion Energy
Segment Reporting Information [Line Items]
Total revenue from external customers	380		361		1,171		1,326
Total operating revenue	603		642		2,135		2,147
Loss from discontinued operations			0				0
Net income attributable to Dominion	144		169		482		472
Dominion Energy | Intersegment Revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	223		281		964		821
Corporate and Other
Segment Reporting Information [Line Items]
Total revenue from external customers	4		(10)		10		54
Total operating revenue	144		148		432		518
Loss from discontinued operations			(23)				(92)
Net income attributable to Dominion	(60)		(61)		(575)		(334)
Corporate and Other | Intersegment Revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	140		158		422		464
Adjustments/Eliminations
Segment Reporting Information [Line Items]
Total revenue from external customers	201	[1]	275	[1]	951	[1]	824	[1]
Total operating revenue	(177)	[1]	(172)	[1]	(496)	[1]	(517)	[1]
Loss from discontinued operations			0	[1]			0	[1]
Net income attributable to Dominion	0	[1]	0	[1]	0	[1]	0	[1]
Adjustments/Eliminations | Intersegment Revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	(378)	[1]	(447)	[1]	(1,447)	[1]	(1,341)	[1]
Virginia Electric and Power Company
Segment Reporting Information [Line Items]
Total revenue from external customers	2,053	[2]	2,059	[2]	5,765	[2]	5,550	[2]
Total operating revenue	2,053		2,059		5,765		5,550
Net income attributable to Dominion	314		387		707		939
Virginia Electric and Power Company | DVP
Segment Reporting Information [Line Items]
Total operating revenue	483		470		1,433		1,366
Net income attributable to Dominion	120		123		371		355
Virginia Electric and Power Company | Dominion Generation
Segment Reporting Information [Line Items]
Total operating revenue	1,570		1,589		4,332		4,184
Net income attributable to Dominion	248		262		570		587
Virginia Electric and Power Company | Corporate and Other
Segment Reporting Information [Line Items]
Total operating revenue	0		0		0		0
Net income attributable to Dominion	(54)		2		(234)		(3)
Dominion Gas Holdings, LLC
Segment Reporting Information [Line Items]
Total revenue from external customers	391	[3]	388	[3]	1,388	[3]	1,404	[3]
Total operating revenue	391		388		1,388		1,404
Net income attributable to Dominion	107		130		364		321
Dominion Gas Holdings, LLC | Dominion Energy
Segment Reporting Information [Line Items]
Total operating revenue	391		388		1,388		1,404
Net income attributable to Dominion	108		131		370		368
Dominion Gas Holdings, LLC | Corporate and Other
Segment Reporting Information [Line Items]
Total operating revenue	0		0		0		0
Net income attributable to Dominion	$ (1)		$ (1)		$ (6)		$ (47)

[1] 2013 amounts have been recast to reflect nonregulated retail energy marketing operations in the Dominion Generation segment.

[2] See Note 17 for amounts attributable to affiliates.

[3] See Note 17 for amounts attributable to related parties.