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	$ (239)					(270)			(270)		31
Issuance of stock	78				$ 78				78
Issuance of stock (in shares)					1
Preferred stock dividends (See Note 16)	(16)					(16)			(16)
Common stock dividends and distributions	(832)					(788)			(788)		(44)
Other comprehensive income (loss), net of tax	(225)							(225)	(225)
Other	1					1			1
Ending balance at Mar. 31, 2020	32,752			$ 2,387	$ 23,902	6,455		(2,018)	30,726		2,026
Ending balance (in shares) at Mar. 31, 2020				2	839
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
Ending balance at Dec. 31, 2020	26,461	[1]		$ 2,387	$ 21,258	4,189		(1,717)	26,117		344
Ending balance (in shares) at Dec. 31, 2020				2	806
Net income (loss) including noncontrolling interests	1,008					1,008			1,008
Issuance of stock	48				$ 48				48
Stock awards (net of change in unearned compensation)	4				4				4
Preferred stock dividends (See Note 16)	(16)					(16)			(16)
Common stock dividends and distributions	(514)					(508)			(508)		(6)
Other comprehensive income (loss), net of tax	46							46	46
Other	1										1
Ending balance at Mar. 31, 2021	$ 27,038			$ 2,387	$ 21,310	$ 4,673		$ (1,671)	$ 26,699		$ 339
Ending balance (in shares) at Mar. 31, 2021				2	806

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