Leases (Lease Assets and Liabilities Recorded in Consolidated Balance Sheets) (Detail) - USD ($) $ in Millions		Dec. 31, 2024	Dec. 31, 2023
Lessee Lease Disclosure [Line Items]
Operating lease assets	[1]	$ 588	$ 578
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]		Deferred Charges Regulatory Assets And Other Assets Noncurrent	Deferred Charges Regulatory Assets And Other Assets Noncurrent
Finance lease assets	[2]	$ 267	$ 258
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]		Property, plant and equipment	Property, plant and equipment
Total lease assets		$ 855	$ 836
Operating lease liabilities	[3]	$ 36	$ 36
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]		Other current liabilities	Other current liabilities
Finance lease liabilities	[4]	$ 62	$ 60
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]		Securities due within one year	Securities due within one year
Total lease liabilities - current		$ 98	$ 96
Operating lease liabilities	[5]	$ 644	$ 627
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]		Deferred Credits and Other Liabilities	Deferred Credits and Other Liabilities
Finance lease liabilities	[6]	$ 214	$ 203
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]		Other	Liabilities held for sale, Other
Total lease liabilities - noncurrent		$ 858	$ 830
Total lease liabilities		956	926
Virginia Electric and Power Company
Lessee Lease Disclosure [Line Items]
Operating lease assets	[1]	$ 410	$ 393
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]		Deferred Charges Regulatory Assets And Other Assets Noncurrent	Deferred Charges Regulatory Assets And Other Assets Noncurrent
Finance lease assets	[2]	$ 146	$ 104
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]		Property, plant and equipment	Property, plant and equipment
Total lease assets		$ 556	$ 497
Operating lease liabilities	[3]	$ 22	$ 20
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]		Other current liabilities	Other current liabilities
Finance lease liabilities	[4]	$ 35	$ 31
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]		Securities due within one year	Securities due within one year
Total lease liabilities - current		$ 57	$ 51
Operating lease liabilities	[5]	$ 399	$ 377
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]		Deferred Credits and Other Liabilities	Deferred Credits and Other Liabilities
Finance lease liabilities	[6]	$ 110	$ 72
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]		Other	Other
Total lease liabilities - noncurrent		$ 509	$ 449
Total lease liabilities		$ 566	$ 500

[1] Dominion Energy includes $588 million and $561 million at December 31, 2024 and 2023, respectively, in other deferred charges and other assets, with the remaining balance at December 31, 2023 in assets held for sale, in its Consolidated Balance Sheets. Virginia Power’s balances are included in other deferred charges and other assets in its Consolidated Balance Sheets.

[2] Dominion Energy includes $267 million and $244 million at December 31, 2024 and 2023, respectively, in property, plant and equipment in its Consolidated Balance Sheets, net of $199 million and $142 million at December 31, 2024 and 2023, respectively, of accumulated amortization, with the remaining balance at December 31, 2023 in assets held for sale. Virginia Power’s balances are included in property, plant and equipment in its Consolidated Balance Sheets, net of $88 million and $51 million at December 31, 2024 and 2023, respectively, of accumulated amortization.

[3] Dominion Energy includes $36 million and $32 million at December 31, 2024 and 2023, respectively, in other current liabilities, with the remaining balance at December 31, 2023 in liabilities held for sale, in its Consolidated Balance Sheets. Virginia Power’s balances are in other current liabilities in its Consolidated Balance Sheets.

[4] Dominion Energy includes $62 million and $57 million at December 31, 2024 and 2023, respectively, in securities due within one year, with the remaining balance at December 31, 2023 in liabilities held for sale, in its Consolidated Balance Sheets. Virginia Power’s balances are included in securities due within one year in its Consolidated Balance Sheets.

[5] Dominion Energy includes $644 million and $610 million at December 31, 2024 and 2023, respectively, in other deferred credits and other liabilities, with the remaining balance at December 31, 2023 in liabilities held for sale, in its Consolidated Balance Sheets. Virginia Power’s balances are included in other deferred credits and other liabilities in its Consolidated Balance Sheets.

[6] Dominion Energy includes $214 million and $192 million at December 31, 2024 and 2023, respectively, in other long-term debt, with the remaining balance in liabilities held for sale, in its Consolidated Balance Sheets. Virginia Power’s balances are included in other long-term debt in its Consolidated Balance Sheets.