Operating Segment (Schedule of Segment Reporting Information, by Segment) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Operating Revenue	$ 2,943	$ 3,050	$ 2,813	$ 3,630	$ 3,185	$ 3,432	$ 2,980	$ 3,523	$ 12,436		$ 13,120		$ 12,835
Total operating revenue									12,436		13,120		12,835
Depreciation, depletion and amortization									1,292		1,208		1,127
Equity in earnings of equity method investees									46		14		25
Interest income									68		54		61
Interest and related charges									1,193		877		816
Income tax expense									452		892		811
Loss from discontinued operations, net of tax									0	[1]	(92)	[1]	(1,125)	[1]
Net income (loss) attributable to Dominion	243	529	159	379	431	569	202	495	1,310		1,697		302
Investment in equity method affiliates	1,081				916				1,081		916
Capital expenditures									5,551		4,104		4,145
Total assets	54,327				50,096				54,327		50,096
Intersegment revenue
Segment Reporting Information [Line Items]
Operating Revenue									0		0		0
DVP
Segment Reporting Information [Line Items]
Operating Revenue									1,918		1,825		1,846
Total operating revenue									1,936		1,834		1,855
Depreciation, depletion and amortization									462		427		392
Equity in earnings of equity method investees									0		0		0
Interest income									0		0		1
Interest and related charges									205		175		187
Income tax expense									317		287		278
Loss from discontinued operations, net of tax											0		0
Net income (loss) attributable to Dominion									502		475		439
Investment in equity method affiliates	0				0				0		0
Capital expenditures									1,652		1,361		1,158
Total assets	13,000				11,900				13,000		11,900
DVP | Intersegment revenue
Segment Reporting Information [Line Items]
Operating Revenue									18		9		9
Dominion Generation
Segment Reporting Information [Line Items]
Operating Revenue									7,665		8,445		8,170
Total operating revenue									7,735		8,513		8,274
Depreciation, depletion and amortization									516		518		483
Equity in earnings of equity method investees									(18)		(14)		3
Interest income									67		66		65
Interest and related charges									240		220		177
Income tax expense									392		483		576
Loss from discontinued operations, net of tax											0		0
Net income (loss) attributable to Dominion									1,101		1,031		1,021
Investment in equity method affiliates	262				280				262		280
Capital expenditures									2,466		1,605		1,615
Total assets	24,200				22,000				24,200		22,000
Dominion Generation | Intersegment revenue
Segment Reporting Information [Line Items]
Operating Revenue									70		68		104
Dominion Energy
Segment Reporting Information [Line Items]
Operating Revenue									1,718		1,783		1,813
Total operating revenue									2,892		2,846		2,743
Depreciation, depletion and amortization									241		228		216
Equity in earnings of equity method investees									54		21		23
Interest income									14		12		30
Interest and related charges									11		26		47
Income tax expense									436		409		352
Loss from discontinued operations, net of tax											0		0
Net income (loss) attributable to Dominion									677		643		551
Investment in equity method affiliates	796				615				796		615
Capital expenditures									1,329		1,043		1,350
Total assets	12,700				12,100				12,700		12,100
Dominion Energy | Intersegment revenue
Segment Reporting Information [Line Items]
Operating Revenue									1,174		1,063		930
Corporate and Other
Segment Reporting Information [Line Items]
Operating Revenue									(12)		3		155
Total operating revenue									560		612		763
Depreciation, depletion and amortization									73		35		36
Equity in earnings of equity method investees									10		7		(1)
Interest income									20		42		71
Interest and related charges									770		522		511
Income tax expense									(693)		(287)		(395)
Loss from discontinued operations, net of tax											(92)		(1,125)
Net income (loss) attributable to Dominion									(970)		(452)		(1,709)
Investment in equity method affiliates	23				21				23		21
Capital expenditures									104		95		22
Total assets	8,700				8,500				8,700		8,500
Corporate and Other | Intersegment revenue
Segment Reporting Information [Line Items]
Operating Revenue									572		609		608
Adjustments & Eliminations
Segment Reporting Information [Line Items]
Operating Revenue									1,147		1,064		851
Total operating revenue									(687)		(685)		(800)
Depreciation, depletion and amortization									0		0		0
Equity in earnings of equity method investees									0		0		0
Interest income									(33)		(66)		(106)
Interest and related charges									(33)		(66)		(106)
Income tax expense									0		0		0
Loss from discontinued operations, net of tax											0		0
Net income (loss) attributable to Dominion									0		0		0
Investment in equity method affiliates	0				0				0		0
Capital expenditures									0		0		0
Total assets	(4,300)				(4,400)				(4,300)		(4,400)
Adjustments & Eliminations | Intersegment revenue
Segment Reporting Information [Line Items]
Operating Revenue									(1,834)		(1,749)		(1,651)
Virginia Electric and Power Company
Segment Reporting Information [Line Items]
Operating Revenue	1,814	2,053	1,729	1,983	1,745	2,059	1,710	1,781	7,579	[2]	7,295	[2]	7,226	[2]
Total operating revenue									7,579		7,295		7,226
Depreciation, depletion and amortization									915		853		782
Interest income									8		6		8
Interest and related charges									411		369		385
Income tax expense									548		659		653
Net income (loss) attributable to Dominion	151	314	69	324	199	387	265	287	858		1,138		1,050
Capital expenditures									3,107		2,533		2,288
Total assets	29,509				26,961				29,509		26,961
Virginia Electric and Power Company | DVP
Segment Reporting Information [Line Items]
Total operating revenue									1,928		1,826		1,847
Depreciation, depletion and amortization									462		427		392
Interest income									0		0		1
Interest and related charges									205		175		186
Income tax expense									317		286		277
Net income (loss) attributable to Dominion									509		483		448
Capital expenditures									1,651		1,360		1,142
Total assets	13,200				12,000				13,200		12,000
Virginia Electric and Power Company | Dominion Generation
Segment Reporting Information [Line Items]
Total operating revenue									5,651		5,475		5,379
Depreciation, depletion and amortization									416		425		390
Interest income									8		6		7
Interest and related charges									203		192		199
Income tax expense									416		399		403
Net income (loss) attributable to Dominion									691		702		653
Capital expenditures									1,456		1,173		1,146
Total assets	16,400				15,100				16,400		15,100
Virginia Electric and Power Company | Corporate and Other
Segment Reporting Information [Line Items]
Total operating revenue									0		(6)		0
Depreciation, depletion and amortization									37		1		0
Interest income									0		0		0
Interest and related charges									3		2		0
Income tax expense									(185)		(26)		(27)
Net income (loss) attributable to Dominion									(342)		(47)		(51)
Capital expenditures									0		0		0
Total assets	0				0				0		0
Virginia Electric and Power Company | Adjustments & Eliminations
Segment Reporting Information [Line Items]
Total operating revenue									0		0		0
Depreciation, depletion and amortization									0		0		0
Interest income									0		0		0
Interest and related charges									0		0		0
Income tax expense									0		0		0
Net income (loss) attributable to Dominion									0		0		0
Capital expenditures									0		0		0
Total assets	(100)				(100)				(100)		(100)
Dominion Gas Holdings, LLC
Segment Reporting Information [Line Items]
Operating Revenue	510	391	428	569	533	388	430	586	1,898	[3]	1,937	[3]	1,677	[3]
Total operating revenue									1,898		1,937		1,677
Depreciation, depletion and amortization									197		188		176
Equity in earnings of equity method investees									21		22		23
Interest income									1		2		2
Interest and related charges									27		28		40
Income tax expense									334		301		288
Net income (loss) attributable to Dominion	148	107	93	164	140	130	53	138	512		461		459
Investment in equity method affiliates	107				105				107		105
Capital expenditures									719		650		928
Total assets	9,848				9,142				9,848		9,142
Dominion Gas Holdings, LLC | Dominion Energy
Segment Reporting Information [Line Items]
Total operating revenue									1,898		1,937		1,677
Depreciation, depletion and amortization									197		188		176
Equity in earnings of equity method investees									21		22		23
Interest income									1		2		2
Interest and related charges									27		28		40
Income tax expense									340		333		293
Net income (loss) attributable to Dominion									521		510		469
Investment in equity method affiliates	107				105				107		105
Capital expenditures									719		650		928
Total assets	9,200				8,500				9,200		8,500
Dominion Gas Holdings, LLC | Corporate and Other
Segment Reporting Information [Line Items]
Total operating revenue									0		0		0
Depreciation, depletion and amortization									0		0		0
Equity in earnings of equity method investees									0		0		0
Interest income									0		0		0
Interest and related charges									0		0		0
Income tax expense									(6)		(32)		(5)
Net income (loss) attributable to Dominion									(9)		(49)		(10)
Investment in equity method affiliates	0				0				0		0
Capital expenditures									0		0		0
Total assets	$ 600				$ 600				$ 600		$ 600

[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] See Note 24 for amounts attributable to affiliates.

[3] See Note 24 for amounts attributable to related parties.