Acquisitions and Dispositions - (Schedule Of Major Classes Of Assets And Liabilities Relating To The Disposal Groups Reported As Held For Sale) (Detail) - USD ($) $ in Millions		Mar. 31, 2024		Dec. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets		$ 9,706		$ 18,529	[1]
Current liabilities		4,386		8,885	[1]
East Ohio | Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets	[2]			497
Property, plant and equipment, net				5,443
Other deferred charges and other assets, including goodwill and intangible assets	[3]			2,659
Current liabilities				560
Long-term debt				2,286
Other deferred credits and liabilities	[4]			1,437
PSNC | Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets	[2]	266		336
Property, plant and equipment, net		2,899		2,806
Other deferred charges and other assets, including goodwill and intangible assets	[3]	823		834
Current liabilities	[5]	180		224
Long-term debt		948		948
Other deferred credits and liabilities	[4]	697		711
Questar Gas and Wexpro | Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets	[2]	505		764
Property, plant and equipment, net		4,465		4,369
Other deferred charges and other assets, including goodwill and intangible assets	[3]	666		766
Current liabilities	[5]	282		389
Long-term debt		1,205		1,205
Other deferred credits and liabilities	[4]	1,066		1,116
Other Sales | Tredegar Solar Fund I, LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets	[2]	(2)		1
Property, plant and equipment, net		28		26
Other deferred charges and other assets, including goodwill and intangible assets	[3]	(1)
Current liabilities		5	[5]	7
Other deferred credits and liabilities	[4]	$ 2		$ 2

[1] Dominion Energy’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date.

[2] Includes cash and cash equivalents of $1 million and $2 million within the PSNC Transaction and $39 million and $26 million within the Questar Gas Transaction at March 31, 2024 and December 31, 2023, respectively. Also includes regulatory assets of $68 million and $89 million within the PSNC Transaction and $53 million and $297 million within the Questar Gas Transaction at March 31, 2024 and December 31, 2023, respectively. In addition, includes cash and cash equivalents of $4 million and regulatory assets of $75 million within the East Ohio Transaction at December 31, 2023.

[3] Includes goodwill of $673 million at both March 31, 2024 and December 31, 2023 within the PSNC Transaction and $642 million and $720 million at March 31, 2024 and December 31, 2023, respectively within the Questar Gas Transaction. Also includes regulatory assets of $83 million and $86 million within the PSNC Transaction and $(44) million and $(39) million within the Questar Gas Transaction at March 31, 2024 and December 31, 2023, respectively. In addition, includes goodwill of $1.5 billion and regulatory assets of $781 million within the East Ohio Transaction at December 31, 2023.

[4] Includes regulatory liabilities of $430 million and $435 million within the PSNC Transaction and $498 million and $502 million within the Questar Gas Transaction at March 31, 2024 and December 31, 2023, respectively. In addition includes regulatory liabilities of $711 million within the East Ohio Transaction at December 31, 2023.

[5] Includes regulatory liabilities of $42 million and $44 million within the PSNC Transaction and $56 million and $55 million within the Questar Gas Transaction at March 31, 2024 and December 31, 2023, respectively. In addition, includes regulatory liabilities of $54 million within the East Ohio Transaction at December 31, 2023.