Acquisitions and Dispositions - (Schedule Of Major Classes Of Assets And Liabilities Relating To The Disposal Groups Reported As Held For Sale) (Details) - USD ($) $ in Millions		Sep. 30, 2023		Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets		$ 18,046		$ 1,776	[1]
Current liabilities		8,331		1,398	[1]
East Ohio | Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets	[3]	358	[2]	544
Property, plant and equipment, net		5,301	[2]	5,012
Other deferred charges and other assets, including goodwill and intangible assets	[4]	2,651	[2]	2,629
Current liabilities	[5]	384	[2]	634
Long-term debt		2,286	[2]	2,287
Other deferred credits and liabilities	[6]	1,427	[2]	1,435
PSNC | Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets	[3]	240	[2]	381
Property, plant and equipment, net		2,705	[2]	2,591
Other deferred charges and other assets, including goodwill and intangible assets	[4]	819	[2]	822
Current liabilities	[5]	145	[2]	151
Long-term debt		798	[2]	798
Other deferred credits and liabilities	[6]	692	[2]	689
Questar Gas and Wexpro | Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets	[3]	680	[2]	803
Property, plant and equipment, net		4,206	[2]	3,984
Other deferred charges and other assets, including goodwill and intangible assets	[4]	1,000	[2]	1,043
Current liabilities	[5]	233	[2]	612
Long-term debt		1,245	[2]	1,245
Other deferred credits and liabilities	[6]	$ 1,120	[2]	1,087
Other Sales | Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets	[3]			1
Property, plant and equipment, net				47
Current liabilities	[5]			1
Other deferred credits and liabilities	[6]			$ 9

[1] Dominion Energy’s Consolidated Balance Sheet at December 31, 2022 has been derived from the audited Consolidated Balance Sheet at that date and recast for certain events as discussed in Note 1.

[2] All amounts at September 30, 2023 are classified as current in Dominion Energy's Consolidated Balance Sheets.

[3] Includes cash and cash equivalents of $4 million and $6 million within the East Ohio Transaction, less than $1 million and less than $1 million within the PSNC Transaction and $35 million and $28 million within the Questar Gas Transaction at September 30, 2023 and December 31, 2022, respectively. Also includes regulatory assets of $83 million and $90 million within the East Ohio Transaction, $114 million and $95 million within the PSNC Transaction and $423 million and $273 million within the Questar Gas Transaction at September 30, 2023 and December 31, 2022, respectively.

[4] Includes goodwill of $1.5 billion, $673 million and $983 million at both September 30, 2023 and December 31, 2022 within the East Ohio Transaction, PSNC Transaction and Questar Gas Transaction, respectively. Also includes regulatory assets of $725 million and $751 million within the East Ohio Transaction, $88 million and $93 million within the PSNC Transaction and $(34) million and $(22) million within the Questar Gas Transaction at September 30, 2023 and December 31, 2022, respectively.

[5] Includes regulatory liabilities of $54 million and $43 million within the East Ohio Transaction, $42 million and $11 million within the PSNC Transaction and $48 million and $144 million within the Questar Gas Transaction at September 30, 2023 and December 31, 2022, respectively.

[6] Includes regulatory liabilities of $725 million and $749 million within the East Ohio Transaction, $441 million and $436 million within the PSNC Transaction and $510 million and $506 million within the Questar Gas Transaction at September 30, 2023 and December 31, 2022, respectively.