Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions		Total	Sun Edison Inc	NRG Energy, Inc	Virginia Electric and Power Company	Dominion Energy Gas Holdings, LLC	Common Units	Convertible Preferred Units	Common Stock	Common Stock Virginia Electric and Power Company	Retained Earnings	Retained Earnings Virginia Electric and Power Company	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Virginia Electric and Power Company	Accumulated Other Comprehensive Income (Loss) Dominion Energy Gas Holdings, LLC	Total Common Shareholders' Equity	Noncontrolling Interests	Noncontrolling Interests Sun Edison Inc	Noncontrolling Interests NRG Energy, Inc	Noncontrolling Interests Common Units	Noncontrolling Interests Convertible Preferred Units	Other Paid-In Capital Virginia Electric and Power Company	Member Units Dominion Energy Gas Holdings, LLC
Beginning balance at Dec. 31, 2015		$ 13,602			$ 10,641	$ 3,318			$ 6,680	$ 5,738	$ 6,458	$ 3,750	$ (474)	$ 40	$ (99)	$ 12,664	$ 938					$ 1,113	$ 3,417
Beginning balance (in shares) at Dec. 31, 2015									596	275
Net income including noncontrolling interests		2,212									2,123					2,123	89
Net income attributable to Dominion		2,123			$ 1,218	392						1,218											392
Sale of interest in merchant solar projects		139							$ 22							22	117
Contributions to Four Brothers and Three Cedars			$ 189															$ 189
Distributions						(150)																	(150)
Purchase of Dominion Energy Midstream common units		(17)							(3)							(3)	(14)
Issuance of common stock		2,152							$ 2,152							2,152
Issuance of common stock (in shares)					0				32
Sale of Dominion Energy Midstream common units - net of offering costs							$ 482	$ 490												$ 482	$ 490
Stock awards (net of change in unearned compensation)		14							$ 14							14
Present value of stock purchase contract payments related to RSNs	[1]	(191)							(191)							(191)
Tax effect of Dominion Energy Questar Pipeline contribution to Dominion Energy Midstream		(116)							(116)							(116)
Dividends and distributions		(1,789)									(1,727)					(1,727)	(62)
Other comprehensive income (loss), net of tax		(325)			$ 6	(24)							(325)	6	(24)	(325)
Other		(2)							(8)							(8)	6
Ending balance at Dec. 31, 2016		16,840			11,865	3,536			$ 8,550	$ 5,738	6,854	4,968	(799)	46	(123)	14,605	2,235					1,113	3,659
Ending Balance (in shares) at Dec. 31, 2016									628	275
Net income including noncontrolling interests		3,120									2,999					2,999	121
Net income attributable to Dominion		2,999			$ 1,540	615						1,540											615
Contributions to Four Brothers and Three Cedars				$ 9															$ 9
Distributions						(15)																	(15)
Issuance of common stock		1,302							$ 1,302							1,302
Issuance of common stock (in shares)					0				17
Sale of Dominion Energy Midstream common units - net of offering costs							$ 18													$ 18
Stock awards (net of change in unearned compensation)		22							$ 22							22
Dividends and distributions		(2,087)			$ (1,199)						(1,931)	(1,199)				(1,931)	(156)
Other comprehensive income (loss), net of tax		141			16	25							140	16	25	140	1
Other		5			2	2			(9)		14	2				5							2
Ending balance at Dec. 31, 2017		19,370			12,224	4,163			$ 9,865	$ 5,738	7,936	5,311	(659)	62	(98)	17,142	2,228					1,113	4,261
Ending Balance (in shares) at Dec. 31, 2017									645	275
Cumulative-effect of changes in accounting principles		6			3	3			$ (127)		1,029	79	(1,023)	(76)	(26)	(121)	127						29
Net income including noncontrolling interests		2,549									2,447					2,447	102
Net income attributable to Dominion		2,447			$ 1,282	301						1,282											301
Distributions						(25)																	(25)
Issuance of common stock		2,461							$ 2,461							2,461
Issuance of common stock (in shares)					0				36
Sale of Dominion Energy Midstream common units - net of offering costs		4															4
Remeasurement of noncontrolling interest in Dominion Energy Midstream									$ 375							375	(375)
Stock awards (net of change in unearned compensation)		22							22							22
Dividends and distributions		(2,331)			$ (464)						(2,185)	(464)				(2,185)	(146)
Other comprehensive income (loss), net of tax		(17)			2	(45)							(18)	2	(45)	(18)	1
Other		(16)							(8)		(8)					(16)
Ending balance at Dec. 31, 2018		$ 22,048			$ 13,047	$ 4,397			$ 12,588	$ 5,738	$ 9,219	$ 6,208	$ (1,700)	$ (12)	$ (169)	$ 20,107	$ 1,941					$ 1,113	$ 4,566
Ending Balance (in shares) at Dec. 31, 2018									681	275

[1] See Note 17 for further information.