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, 2019	$ 34,033		$ (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:AccountingStandardsUpdate201602Member
Net income (loss) including noncontrolling interests	$ (1,371)					(1,439)			(1,439)		68
Issuance of stock	148				$ 148				148
Issuance of stock (in shares)					2
Stock awards (net of change in unearned compensation)	13				$ 13				13
Preferred stock dividends (See Note 16)	(32)					(32)			(32)
Common stock dividends and distributions	(1,671)					(1,577)			(1,577)		(94)
Other comprehensive income (loss), net of tax	(187)							(187)	(187)
Other	(1)				(1)				(1)
Ending balance at Jun. 30, 2020	30,884			$ 2,387	$ 23,984	4,480		(1,980)	28,871		2,013
Ending balance (in shares) at Jun. 30, 2020				2	840
Beginning balance at Mar. 31, 2020	32,752			$ 2,387	$ 23,902	6,455		(2,018)	30,726		2,026
Beginning balance (in shares) at Mar. 31, 2020				2	839
Net income (loss) including noncontrolling interests	(1,132)					(1,169)			(1,169)		37
Issuance of stock	70				$ 70				70
Issuance of stock (in shares)					1
Stock awards (net of change in unearned compensation)	13				$ 13				13
Preferred stock dividends (See Note 16)	(16)					(16)			(16)
Common stock dividends and distributions	(839)					(789)			(789)		(50)
Other comprehensive income (loss), net of tax	38							38	38
Other	(2)				(1)	(1)			(2)
Ending balance at Jun. 30, 2020	30,884			$ 2,387	$ 23,984	4,480		(1,980)	28,871		2,013
Ending balance (in shares) at Jun. 30, 2020				2	840
Beginning balance at Dec. 31, 2020	26,461	[1]		$ 2,387	$ 21,258	4,189		(1,717)	26,117		344
Beginning balance (in shares) at Dec. 31, 2020				2	806
Net income (loss) including noncontrolling interests	1,303					1,293			1,293		10
Issuance of stock	97				$ 97				97
Issuance of stock (in shares)					1
Stock awards (net of change in unearned compensation)	15				$ 15				15
Preferred stock dividends (See Note 16)	(32)					(32)			(32)
Common stock dividends and distributions	(1,036)					(1,016)			(1,016)		(20)
Other comprehensive income (loss), net of tax	77							77	77
Other	(1)				(1)				(1)
Ending balance at Jun. 30, 2021	26,884			$ 2,387	$ 21,369	4,434		(1,640)	26,550		334
Ending balance (in shares) at Jun. 30, 2021				2	807
Beginning balance at Mar. 31, 2021	27,038			$ 2,387	$ 21,310	4,673		(1,671)	26,699		339
Beginning balance (in shares) at Mar. 31, 2021				2	806
Net income (loss) including noncontrolling interests	295					285			285		10
Issuance of stock	49				$ 49				49
Issuance of stock (in shares)					1
Stock awards (net of change in unearned compensation)	11				$ 11				11
Preferred stock dividends (See Note 16)	(16)					(16)			(16)
Common stock dividends and distributions	(523)					(508)			(508)		(15)
Other comprehensive income (loss), net of tax	31							31	31
Other	(1)				(1)				(1)
Ending balance at Jun. 30, 2021	$ 26,884			$ 2,387	$ 21,369	$ 4,434		$ (1,640)	$ 26,550		$ 334
Ending balance (in shares) at Jun. 30, 2021				2	807

[1] Dominion Energy’s Consolidated Balance Sheet at December 31, 2020 has been derived from the audited Consolidated Balance Sheet at that date.