Operating Revenue (Schedule of Operating Revenue) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		$ 14,182	$ 13,487	$ 14,552
Other revenues	[1],[2]	277	906	(614)
Total operating revenue		14,459	14,393	13,938
Regulated Electric Sales | Residential
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		5,436	5,141	5,261
Regulated Electric Sales | Commercial
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers	[3]	4,679	4,556	4,480
Regulated Electric Sales | Industrial
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		845	887	901
Regulated Electric Sales | Government and Other Retail
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		1,081	1,036	1,235
Regulated Electric Sales | Wholesale
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		136	176	234
Nonregulated Electric Sales
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		933	758	1,249
Regulated Gas Sales | Residential
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		309	293	331
Regulated Gas Sales | Commercial
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		136	145	188
Regulated Gas Sales | Other
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		67	79	168
Regulated Gas Transportation and Storage
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		21	18	38
Other Regulated Revenues
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		372	253	296
Other Nonregulated Revenues
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers	[2],[4],[5]	167	145	171
Virginia Electric and Power Company
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		9,959	9,372	9,868
Other revenues	[1],[2]	276	201	(214)
Total operating revenue		10,235	9,573	9,654
Virginia Electric and Power Company | Regulated Electric Sales | Residential
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		4,133	3,863	4,039
Virginia Electric and Power Company | Regulated Electric Sales | Commercial
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers	[3]	3,786	3,632	3,647
Virginia Electric and Power Company | Regulated Electric Sales | Industrial
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		429	440	472
Virginia Electric and Power Company | Regulated Electric Sales | Government and Other Retail
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		1,015	965	1,172
Virginia Electric and Power Company | Regulated Electric Sales | Wholesale
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		105	116	132
Virginia Electric and Power Company | Nonregulated Electric Sales
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		86	65	68
Virginia Electric and Power Company | Other Regulated Revenues
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		359	238	277
Virginia Electric and Power Company | Other Nonregulated Revenues
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers	[2],[4],[5]	$ 46	$ 53	$ 61

[1] Includes alternative revenue of $129 million, $162 million and $72 million at both Dominion Energy and Virginia Power for years ended December 31, 2024, 2023 and 2022, respectively.

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

[3] Includes large scale users including certain data center customers.

[4] Includes revenue from transition services agreements of $61 million, $18 million and $28 million for the years ended December 31, 2024, 2023 and 2022, respectively, at Dominion Energy.

[5] Includes sales of renewable energy credits of $31 million, $44 million and $42 million for the years ended December 31, 2024, 2023 and 2022, respectively, at Dominion Energy and $12 million, $29 million and $18 million for the years ended December 31, 2024, 2023 and 2022, respectively, at Virginia Power.