Consolidated Statements of Equity - USD ($) $ in Millions	Total	Series A Preferred Stock	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock	Preferred Stock Series A Preferred Stock	Common Stock	Common Stock Series A Preferred Stock	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	AOCI	Total Shareholders' Equity	Total Shareholders' Equity Series A Preferred Stock	Total Shareholders' Equity Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interests
Beginning balance at Dec. 31, 2018	$ 22,048					$ 12,588		$ 9,219		$ (1,700)	$ 20,107			$ 1,941
Beginning balance (in shares) at Dec. 31, 2018						681,000,000
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-02, us-gaap:AccountingStandardsUpdate201613Member
Net income (loss) including noncontrolling interests	$ 1,376							1,358			1,358			18
Issuance of stock	$ 5,401			$ 2,387		$ 3,014					5,401
Issuance of stock (in shares)	6,100,000			2,000,000		39,000,000
Stock repurchases (in shares)						0
Stock purchase contract component of 2019 Equity Units	$ (264)					$ (264)					(264)
Acquisition of SCANA	6,818					$ 6,818					6,818
Acquisition of SCANA (in shares)						96,000,000
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)						22,000,000
Sale of interest in Cove Point	1,862					$ 476					476			1,386
Stock awards (net of change in unearned compensation)	24					24					24
Preferred stock dividends (See Note 19)	(17)							(17)			(17)
Common dividends and distributions	(3,068)							(2,983)			(2,983)			(85)
Other comprehensive income (loss), net of tax	(93)									(93)	(93)
Other	(14)					(13)		(1)			(14)
Ending balance at Dec. 31, 2019	$ 34,033		$ (48)	$ 2,387		$ 23,824		7,576	$ (48)	(1,793)	31,994		$ (48)	2,039
Ending Balance (in shares) at Dec. 31, 2019				2,000,000		838,000,000
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-02
Net income (loss) including noncontrolling interests	$ (550)							(401)			(401)			(149)
Issuance of stock	481					$ 481					481
Issuance of stock (in shares)						7,000,000
Stock repurchases	(3,080)					$ (3,080)					(3,080)
Stock repurchases (in shares)						(38,900,000)
Stock awards (net of change in unearned compensation)	29					$ 29					29
Preferred stock dividends (See Note 19)	(65)							(65)			(65)
Common dividends and distributions	(3,037)							(2,873)			(2,873)			(164)
Other comprehensive income (loss), net of tax	76									76	76
GT&S Transaction closing	(1,367)					17					17			(1,384)
Other	(11)					(13)					(13)			2
Ending balance at Dec. 31, 2020	$ 26,461			$ 2,387		$ 21,258		4,189		(1,717)	26,117			344
Ending Balance (in shares) at Dec. 31, 2020				2,000,000		806,000,000
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-02
Net income (loss) including noncontrolling interests	$ 3,314							3,288			3,288			26
Issuance of stock	1,332			$ 992		$ 340					1,332
Issuance of stock (in shares)				1,000,000		4,000,000
Stock repurchases (in shares)						0
Stock awards (net of change in unearned compensation)	28					$ 28					28
Preferred stock dividends (See Note 19)	(68)							(68)			(68)
Common dividends and distributions	(2,083)							(2,036)			(2,036)			(47)
Other comprehensive income (loss), net of tax	259									259	259
Reclassification of Series A Preferred Stock to Mezzanine Equity		$ (1,610)			$ (1,596)		$ (14)					$ (1,610)
Reclassification of Series A Preferred Stock to Mezzanine Equity (in shares)					(1,000,000)
Sale of non-wholly-owned nonregulated solar facilities	(323)													$ (323)
Other	(2)					(2)					(2)
Ending balance at Dec. 31, 2021	$ 27,308			$ 1,783		$ 21,610		$ 5,373		$ (1,458)	$ 27,308
Ending Balance (in shares) at Dec. 31, 2021				2,000,000		810,000,000