Consolidated Statements of Equity (Unaudited) - USD ($) shares in Millions, $ in Millions		Total		Cumulative-effect of Changes in Accounting Principles	Preferred Stock	Common Stock	Retained Earnings	Retained Earnings Cumulative-effect of Changes in Accounting Principles	AOCI	Total Shareholders' Equity	Total Shareholders' Equity Cumulative-effect of Changes in Accounting Principles	Noncontrolling Interests
Beginning balance at Dec. 31, 2018		$ 22,048			$ 0	$ 12,588	$ 9,219		$ (1,700)	$ 20,107		$ 1,941
Beginning balance (in shares) at Dec. 31, 2018					0	681
Net income (loss) including noncontrolling interest		366					349			349		17
Issuance of stock		3,398			$ 1,596	$ 1,802				3,398
Issuance of stock (in shares)					2	24
Stock purchase contract component of 2019 Equity Units	[1]	(264)				$ (264)				(264)
Acquisition of SCANA		6,818				$ 6,818				6,818
Acquisition of SCANA (in shares)						96
Acquisition of public interest in Dominion Energy Midstream		(40)				$ 1,181				1,181		(1,221)
Acquisition of public interest in Dominion Energy Midstream (in shares)						22
Stock awards (net of change in unearned compensation)		19				$ 19				19
Preferred stock dividends	[1]	(8)					(8)			(8)
Common stock dividends and distributions		(2,290)					(2,224)			(2,224)		(66)
Other comprehensive loss, net of tax		(77)							(77)	(77)
Other		(13)				(13)				(13)
Ending balance at Sep. 30, 2019		29,957			$ 1,596	$ 22,131	7,336		(1,777)	29,286		671
Ending balance (in shares) at Sep. 30, 2019					2	823
Beginning balance at Jun. 30, 2019		28,381			$ 1,596	$ 20,660	7,124		(1,683)	27,697		684
Beginning balance (in shares) at Jun. 30, 2019					2	803
Net income (loss) including noncontrolling interest		985					975			975		10
Issuance of stock		1,477				$ 1,477				1,477
Issuance of stock (in shares)						20
Stock awards (net of change in unearned compensation)		7				$ 7				7
Preferred stock dividends	[1]	(7)					(7)			(7)
Common stock dividends and distributions		(778)					(755)			(755)		(23)
Other comprehensive loss, net of tax		(94)							(94)	(94)
Other		(14)				(13)	(1)			(14)
Ending balance at Sep. 30, 2019		29,957			$ 1,596	$ 22,131	7,336		(1,777)	29,286		671
Ending balance (in shares) at Sep. 30, 2019					2	823
Beginning balance at Dec. 31, 2019		$ 34,033	[2]	$ (48)	$ 2,387	$ 23,824	7,576	$ (48)	(1,793)	31,994	$ (48)	2,039
Beginning balance (in shares) at Dec. 31, 2019					2	838
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member
Net income (loss) including noncontrolling interest		$ (1,240)					(1,083)			(1,083)		(157)
Issuance of stock		481				$ 481				481
Issuance of stock (in shares)						6
Stock repurchases		(2,385)				$ (2,385)				(2,385)
Stock repurchases (in shares)						(28)
Stock awards (net of change in unearned compensation)		22				$ 22				22
Preferred stock dividends	[1]	(48)					(48)			(48)
Common stock dividends and distributions		(2,515)					(2,362)			(2,362)		(153)
Other comprehensive loss, net of tax		(223)							(223)	(223)
Other		(11)				(12)				(12)		1
Ending balance at Sep. 30, 2020		28,066			$ 2,387	$ 21,930	4,035		(2,016)	26,336		1,730
Ending balance (in shares) at Sep. 30, 2020					2	816
Beginning balance at Jun. 30, 2020		30,884			$ 2,387	$ 23,984	4,480		(1,980)	28,871		2,013
Beginning balance (in shares) at Jun. 30, 2020					2	840
Net income (loss) including noncontrolling interest		131					356			356		(225)
Issuance of stock		333				$ 333				333
Issuance of stock (in shares)						4
Stock repurchases		(2,385)				$ (2,385)				(2,385)
Stock repurchases (in shares)						(28)
Stock awards (net of change in unearned compensation)		9				$ 9				9
Preferred stock dividends	[1]	(16)					(16)			(16)
Common stock dividends and distributions		(844)					(785)			(785)		(59)
Other comprehensive loss, net of tax		(36)							(36)	(36)
Other		(10)				(11)				(11)		1
Ending balance at Sep. 30, 2020		$ 28,066			$ 2,387	$ 21,930	$ 4,035		$ (2,016)	$ 26,336		$ 1,730
Ending balance (in shares) at Sep. 30, 2020					2	816

[1] See Note 16 for further information.

[2] Dominion Energy’s Consolidated Balance Sheet at December 31, 2019 has been derived from the audited Consolidated Balance Sheet at that date.