Operating Segments (Schedule of Segment Reporting Information, by Segment) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Total revenue from external customers		$ 2,747	$ 2,813	$ 6,156	$ 6,443
Total operating revenue		2,747	2,813	6,156	6,443
Net income attributable to Dominion		413	159	949	538
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		500	445	1,064	945
Total operating revenue		505	450	1,074	954
Net income attributable to Dominion		117	116	257	247
DVP | Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers		5	5	10	9
Dominion Generation
Segment Reporting Information [Line Items]
Total revenue from external customers		1,700	1,694	3,822	3,951
Total operating revenue		1,712	1,704	3,860	3,988
Net income attributable to Dominion		250	159	532	468
Dominion Generation | Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers		12	10	38	37
Dominion Energy
Segment Reporting Information [Line Items]
Total revenue from external customers		393	429	772	791
Total operating revenue		556	681	1,295	1,532
Net income attributable to Dominion		129	130	336	338
Dominion Energy | Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers		163	252	523	741
Corporate and Other
Segment Reporting Information [Line Items]
Total revenue from external customers		4	4	(9)	7
Total operating revenue		148	143	277	288
Net income attributable to Dominion		(83)	(246)	(176)	(515)
Corporate and Other | Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers		144	139	286	281
Consolidation, Eliminations [Member]
Segment Reporting Information [Line Items]
Total revenue from external customers		150	241	507	749
Total operating revenue		(174)	(165)	(350)	(319)
Net income attributable to Dominion		0	0	0	0
Consolidation, Eliminations [Member] | Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers		(324)	(406)	(857)	(1,068)
Virginia Electric and Power Company
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	1,813	1,729	3,950	3,712
Total operating revenue		1,813	1,729	3,950	3,712
Net income attributable to Dominion		246	69	515	393
Virginia Electric and Power Company | DVP
Segment Reporting Information [Line Items]
Total operating revenue		502	448	1,069	950
Net income attributable to Dominion		117	117	257	251
Virginia Electric and Power Company | Dominion Generation
Segment Reporting Information [Line Items]
Total operating revenue		1,311	1,281	2,896	2,762
Net income attributable to Dominion		155	133	345	322
Virginia Electric and Power Company | Corporate and Other
Segment Reporting Information [Line Items]
Total operating revenue		0	0	(15)	0
Net income attributable to Dominion		(26)	(181)	(87)	(180)
Dominion Gas Holdings, LLC
Segment Reporting Information [Line Items]
Total revenue from external customers	[2]	395	428	926	997
Total operating revenue		395	428	926	997
Net income attributable to Dominion		85	93	246	257
Dominion Gas Holdings, LLC | Dominion Energy
Segment Reporting Information [Line Items]
Total operating revenue		395	428	926	997
Net income attributable to Dominion		87	96	251	262
Dominion Gas Holdings, LLC | Corporate and Other
Segment Reporting Information [Line Items]
Total operating revenue		0	0	0	0
Net income attributable to Dominion		$ (2)	$ (3)	$ (5)	$ (5)

[1] See Note 18 for amounts attributable to affiliates.

[2] See Note 18 for amounts attributable to related parties.