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, 2024		Sep. 30, 2024		Jun. 30, 2024		Mar. 31, 2024		Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022
Quarterly Financial Information Disclosure [Line Items]
Operating Revenue	$ 3,400		$ 3,941		$ 3,486		$ 3,632		$ 3,534	$ 3,810	$ 3,166	$ 3,883	$ 14,459		$ 14,393		$ 13,938
Income from continuing operations	391		1,218		805		833		712	1,029	594	1,079	3,247		3,414		1,447
Net income (loss) from continuing operations including noncontrolling interests	95		973		483		323		364	694	407	691	1,874		2,156		269
Net Income (Loss) From Discontinued Operations Including Noncontrolling Interests	(3)		(15)		97		118		(33)	(541)	168	281	197	[1]	(125)	[1]	922	[1]
Net Income Including Noncontrolling Interests	92		958		580		441		331	153	575	972	2,071		2,031		1,191
Noncontrolling Interests	(53)		0		0		0						(53)		0		0
Net Income	$ 145		$ 958		$ 580		$ 441		$ 331	$ 153	$ 575	$ 972	$ 2,124		$ 2,031		$ 1,191
Net income from continuing operations	$ 0.15		$ 1.14		$ 0.54		$ 0.36		$ 0.41	$ 0.81	$ 0.46	$ 0.8	$ 2.2		$ 2.48		$ 0.22	[2]
Net income (loss) from discontinued operations	0		(0.02)		0.12		0.14		(0.04)	(0.65)	0.2	0.34	0.24		(0.15)		1.11	[2]
Net income attributable to Dominion Energy	0.15		1.12		0.66		0.50		0.37	0.16	0.66	1.14	2.44		2.33		1.33	[2]
Net income from continuing operations	0.15		1.14		0.54		0.36		0.41	0.81	0.46	0.8	2.2		2.48		0.22	[2]
Net income (loss) from discontinued operations	0		(0.02)		0.12		0.14		(0.04)	(0.65)	0.2	0.34	0.24		(0.15)		1.11	[2]
Net income attributable to Dominion Energy	0.15		1.12		0.66		0.5		0.37	0.16	0.66	1.14	2.44		2.33		1.33	[2]
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		$ 2.67
Series B Preferred Stock
Quarterly Financial Information Disclosure [Line Items]
Dividends declared per preferred share	9.688	[3]	11.625	[3]	9.922	[3]	11.625	[3]	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 $31 million, $1.3 billion and $207 million for the years ended December 31, 2024, 2023 and 2022, respectively.

[2] As discussed in Note 19, effective in June 2022 through its redemption in September 2022, the Series A Preferred Stock was considered to be mandatorily redeemable and was classified in current liabilities.

[3] See Note 19 for a discussion of repurchases and redemptions during the second and fourth quarters