Operating Segments (Schedule of Segment Reporting Information, by Segment) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Total revenue from external customers	$ 3,523		$ 3,397	[1]
Intersegment revenue	0		0
Total operating revenue	3,523		3,397
Income from discontinued operations	1		(10)	[1]
Net income attributable to Dominion	495		494	[1]
DVP
Total revenue from external customers	907		930
Intersegment revenue	42		63
Total operating revenue	949		993
Income from discontinued operations	0		0
Net income attributable to Dominion	142		166
Dominion Generation
Total revenue from external customers	1,651	[2]	1,580	[2]
Intersegment revenue	36	[2]	76	[2]
Total operating revenue	1,687	[2]	1,656	[2]
Income from discontinued operations	0	[2]	0	[2]
Net income attributable to Dominion	227	[2]	233	[2]
Dominion Energy
Total revenue from external customers	611		616
Intersegment revenue	265		200
Total operating revenue	876		816
Income from discontinued operations	0		0
Net income attributable to Dominion	179		149
Corporate and Other
Total revenue from external customers	47	[2]	39	[2]
Intersegment revenue	142	[2]	149	[2]
Total operating revenue	189	[2]	188	[2]
Income from discontinued operations	1	[2]	(10)	[2]
Net income attributable to Dominion	(53)	[2]	(54)	[2]
Adjustments/Eliminations
Total revenue from external customers	307		232
Intersegment revenue	(485)		(488)
Total operating revenue	(178)		(256)
Income from discontinued operations	0		0
Net income attributable to Dominion	0		0
Virginia Electric and Power Company
Total revenue from external customers	1,781		1,754
Total operating revenue	1,781		1,754
Net income attributable to Dominion	287		243
Virginia Electric and Power Company | DVP
Total operating revenue	465		459
Net income attributable to Dominion	118		107
Virginia Electric and Power Company | Dominion Generation
Total operating revenue	1,316		1,295
Net income attributable to Dominion	168		133
Virginia Electric and Power Company | Corporate and Other
Total operating revenue	0		0
Net income attributable to Dominion	$ 1		$ 3

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

[2] 2012 amounts have been recast to reflect Brayton Point and Kincaid as discontinued operations, as discussed in Note 3.