Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions		Total	Common Units	Convertible Preferred Units	IPO	Total Common Shareholders' Equity	Total Common Shareholders' Equity Common Units	Total Common Shareholders' Equity Convertible Preferred Units	Total Common Shareholders' Equity IPO	Common Stock	Retained Earnings		Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests	Noncontrolling Interests Common Units	Noncontrolling Interests Convertible Preferred Units	Noncontrolling Interests IPO	Virginia Electric and Power Company	Virginia Electric and Power Company Common Stock	Virginia Electric and Power Company Other Paid-In Capital	Virginia Electric and Power Company Retained Earnings	Virginia Electric and Power Company Accumulated Other Comprehensive Income (Loss)	Dominion Gas Holdings, LLC	Dominion Gas Holdings, LLC Membership Interests	Dominion Gas Holdings, LLC Accumulated Other Comprehensive Income (Loss)
Beginning Balance (in shares) at Dec. 31, 2013										581									275
Beginning Balance, value at Dec. 31, 2013		$ 11,642				$ 11,642				$ 5,783	$ 6,183		$ (324)	$ 0				$ 9,798	$ 5,738	$ 1,113	$ 2,899	$ 48
Beginning Balance, value at Dec. 31, 2013																							$ 3,427	$ 3,485	$ (58)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income including noncontrolling interests		1,326				1,323					1,323			3				845
Dominion Midstream's acquisition of interest in Iroquois and Issuance of Dominion Midstream common units, net of offering costs					$ 392				$ 0								$ 392
Net income attributable to Dominion		1,310																858			858		512	512
Equity contribution from parent																							1	1
Distributions																							(346)	(346)
Issuance of stock-employee and direct stock purchase plans (in shares)										3
Issuance of stock-employee and direct stock purchase plans		205				205				$ 205
Stock awards and stock options exercised (net of change in unearned compensation), value		14				14				$ 14
Other stock issuances (in shares)	[1]									1
Other stock issuances, value	[1]	14				14				$ 14
Present value of stock purchase contract payments related to RSNs	[2]	(143)				(143)				(143)
Dividends		(1,411)				(1,411)					(1,411)	[2]						(603)			(603)
Other comprehensive income (loss), net of tax		(92)				(92)							(92)					2				2	(28)		(28)
Other		10				3				$ 3				7
Beginning Balance, value at Dec. 31, 2014																							3,566	3,652	(86)
Ending Balance (in shares) at Dec. 31, 2014										585									275
Beginning Balance, value at Dec. 31, 2014		11,957				11,555				$ 5,876	6,095		(416)	402				10,055	$ 5,738	1,113	3,154	50
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income including noncontrolling interests		1,923				1,899					1,899			24				1,087
Dominion Midstream's acquisition of interest in Iroquois and Issuance of Dominion Midstream common units, net of offering costs		216				0								216
Acquisition of Four Brothers and Three Cedars		47				0								47
Contributions from SunEdison to Four Brothers and Three Cedars		103				0								103
Sale of interest in merchant solar projects		205				26				26				179
Purchase of Dominion Midstream common units		(25)				(6)				$ (6)				(19)
Net income attributable to Dominion		1,899																1,087			1,087		457	457
Distributions																							(692)	(692)
Issuance of stock-employee and direct stock purchase plans (in shares)										11
Issuance of stock-employee and direct stock purchase plans		786				786				$ 786
Stock awards and stock options exercised (net of change in unearned compensation), value		13				13				13
Dividends		(1,536)				(1,536)					(1,536)							(491)			(491)
Dominion Midstream distributions		(16)				0								(16)
Other comprehensive income (loss), net of tax		(58)				(58)							(58)					(10)				(10)	(13)		(13)
Other		(13)				(15)				$ (15)				2
Beginning Balance, value at Dec. 31, 2015																							3,318	3,417	(99)
Ending Balance (in shares) at Dec. 31, 2015										596									275
Beginning Balance, value at Dec. 31, 2015		13,602				12,664				$ 6,680	6,458		(474)	938				10,641	$ 5,738	1,113	3,750	40
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income including noncontrolling interests		2,212				2,123					2,123			89				1,218
Dominion Midstream's acquisition of interest in Iroquois and Issuance of Dominion Midstream common units, net of offering costs			$ 482	$ 490			$ 0	$ 0							$ 482	$ 490
Contributions from SunEdison to Four Brothers and Three Cedars		189				0								189
Sale of interest in merchant solar projects		139				22				22				117
Purchase of Dominion Midstream common units		(17)				(3)				$ (3)				(14)
Net income attributable to Dominion		2,123																1,218			1,218		392	392
Distributions																							(150)	(150)
Issuance of stock-employee and direct stock purchase plans (in shares)										32
Issuance of stock-employee and direct stock purchase plans		2,152				2,152				$ 2,152
Stock awards and stock options exercised (net of change in unearned compensation), value		14				14				14
Present value of stock purchase contract payments related to RSNs	[2]	(191)				(191)				(191)
Tax effect of Questar Pipeline contribution to Dominion Midstream		(116)				(116)				(116)
Dividends		(1,789)				(1,727)					(1,727)			(62)
Other comprehensive income (loss), net of tax		(325)				(325)							(325)					6				6	(24)		(24)
Other		(2)				(8)				$ (8)				6
Beginning Balance, value at Dec. 31, 2016																							$ 3,536	$ 3,659	$ (123)
Ending Balance (in shares) at Dec. 31, 2016										628									275
Beginning Balance, value at Dec. 31, 2016		$ 16,840				$ 14,605				$ 8,550	$ 6,854		$ (799)	$ 2,235				$ 11,865	$ 5,738	$ 1,113	$ 4,968	$ 46

[1] Contains shares issued in excess of principal amounts related to converted securities. See Note 17 for further information on convertible securities.

[2] See Note 17 for further information.