Quarterly Financial Data (Unaudited) - Summary of Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021
Quarterly Financial Information Disclosure [Line Items]
Operating Revenue	$ 3,534	$ 3,810	$ 3,166	$ 3,883	$ 3,807	$ 3,961	$ 3,058	$ 3,112	$ 14,393		$ 13,938		$ 11,419
Income (loss) from continuing operations	712	1,029	594	1,079	253	998	(461)	643	3,414		1,433		1,996
Net income (loss) from continuing operations including noncontrolling interests	344	698	415	700	222	585	(659)	279	2,157		427		2,061
Net Income (Loss) From Discontinued Operations Including Noncontrolling Interest	(71)	(541)	168	281	122	150	212	410	(163)	[1],[2]	894	[1],[2]	1,358	[1],[2]
Net Income Including Noncontrolling Interests	273	157	583	981	344	735	(447)	689	1,994		1,321		3,419
Net income (loss) attributable to Dominion Energy	$ 273	$ 157	$ 583	$ 981	$ 344	$ 735	$ (447)	$ 689	$ 1,994		$ 1,321		$ 3,399
Net income from continuing operations	$ 0.39	$ 0.81	$ 0.47	$ 0.81	$ 0.24	$ 0.68	$ (0.84)	$ 0.32	$ 2.48		$ 0.41		$ 2.44
Net income (loss) from discontinued operations	(0.09)	(0.65)	0.2	0.34	0.15	0.18	0.26	0.5	(0.19)		1.08		1.68
Net income attributable to Dominion Energy	0.3	0.16	0.67	1.15	0.39	0.86	(0.58)	0.82	2.29		1.49		4.12
Net income from continuing operations	0.39	0.81	0.47	0.81	0.24	0.68	(0.84)	0.31	2.48		0.41		2.44
Net income (loss) from discontinued operations	(0.09)	(0.65)	0.2	0.34	0.15	0.18	0.26	0.5	(0.19)		1.08		1.68
Net income attributable to Dominion Energy	0.3	0.16	0.67	1.15	0.39	0.86	(0.58)	0.81	2.29		1.49		4.12
Dividends declared per common share	$ 0.6675	$ 0.6675	$ 0.6675	$ 0.6675	$ 0.6675	$ 0.6675	$ 0.6675	$ 0.6675	$ 2.67		$ 2.67		$ 2.52
Virginia Electric and Power Company
Quarterly Financial Information Disclosure [Line Items]
Operating Revenue	$ 2,292	$ 2,645	$ 2,252	$ 2,384	$ 2,436	$ 2,875	$ 2,176	$ 2,167	$ 9,573	[3]	$ 9,654	[3]	$ 7,470	[3]
Income (loss) from continuing operations	504	819	554	597	447	802	237	562	2,474		2,048		2,497
Net Income Including Noncontrolling Interests									1,452		1,112		1,662
Net income (loss) attributable to Dominion Energy	$ 288	$ 475	$ 334	$ 355	$ 218	$ 516	$ 42	$ 336	$ 1,452		$ 1,112		$ 1,662
Series A Preferred Stock
Quarterly Financial Information Disclosure [Line Items]
Dividends declared per preferred share	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 2.917	$ 4.375
Series B Preferred Stock
Quarterly Financial Information Disclosure [Line Items]
Dividends declared per preferred share	11.625	11.625	11.625	11.625	11.625	11.625	11.625	11.625
Series C Preferred Stock
Quarterly Financial Information Disclosure [Line Items]
Dividends declared per preferred share	$ 10.875	$ 10.875	$ 10.875	$ 10.875	$ 10.875	$ 10.875	$ 10.875	$ 10.875

[1] Includes income tax expense of $1.3 billion, $197 million and $374 million for the years ended December 31, 2023, 2022 and 2021, respectively.

[2] See Note 9 for amounts attributable to related parties.

[3] See Note 25 for amounts attributable to affiliates.