Dominion Energy (D) 10-Q1 Nov 242024 Q3 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2024	Oct. 25, 2024
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Title of 12(b) Security	Common Stock, no par value
Trading Symbol	D
Security Exchange Name	NYSE
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	VA
Entity Registrant Name	DOMINION ENERGY, INC.
Entity Central Index Key	0000715957
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		840,009,626
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	001-08489
Entity Tax Identification Number	54-1229715
Entity Address, Address Line One	120 Tredegar Street
Entity Address, City or Town	Richmond
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	23219
City Area Code	804
Local Phone Number	819-2284
Virginia Electric and Power Company
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	VA
Entity Registrant Name	VIRGINIA ELECTRIC AND POWER COMPANY
Entity Central Index Key	0000103682
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		324,245
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	000-55337
Entity Tax Identification Number	54-0418825
Entity Address, Address Line One	120 Tredegar Street
Entity Address, City or Town	Richmond
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	23219
City Area Code	804
Local Phone Number	819-2284

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating Revenue		$ 3,941	$ 3,810	$ 11,059	$ 10,859
Operating Expenses
Electric fuel and other energy-related purchases		910	1,049	2,787	3,010
Purchased electric capacity		24	20	57	43
Purchased gas		34	40	198	212
Other operations and maintenance		900	842	2,597	2,366
Depreciation and amortization		549	667	1,791	1,896
Other taxes		184	162	556	517
Impairment of assets and other charges		122	1	219	136
Losses (gains) on sales of assets		0	0	(2)	(23)
Total operating expenses		2,723	2,781	8,203	8,157
Income from operations		1,218	1,029	2,856	2,702
Other income (expense)		335	56	1,020	646
Interest and related charges		403	192	1,446	1,066
Income from continuing operations including noncontrolling interests before income tax expense		1,150	893	2,430	2,282
Income tax expense		183	195	412	469
Net Income From Continuing Operations		967	698	2,018	1,813
Net Income (Loss) From Discontinued Operations	[1]	(13)	(541)	182	(92)
Net Income Including Noncontrolling Interests		954	157	2,200	1,721
Noncontrolling Interests		0	0	0	0
Net Income		954	157	2,200	1,721
Amounts attributable to Dominion Energy
Net income from continuing operations		967	698	2,018	1,813
Net income (loss) from discontinued operations		$ (13)	$ (541)	$ 182	$ (92)
[EPS - Basic]
Net income from continuing operations		$ 1.14	$ 0.81	$ 2.33	$ 2.10
Net income (loss) from discontinued operations		(0.02)	(0.65)	0.22	(0.11)
Net income attributable to Dominion Energy		1.12	0.16	2.55	1.99
[EPS - Diluted]
Net income from continuing operations		1.14	0.81	2.33	2.10
Net income (loss) from discontinued operations		(0.02)	(0.65)	0.22	(0.11)
Net income attributable to Dominion Energy		$ 1.12	$ 0.16	$ 2.55	$ 1.99
Virginia Electric and Power Company
Operating Revenue	[2]	$ 2,762	$ 2,645	$ 7,788	$ 7,281
Operating Expenses
Electric fuel and other energy-related purchases	[2]	690	736	2,098	2,242
Purchased electric capacity		24	15	53	33
Affiliated suppliers		110	98	325	290
Other operations and maintenance		464	434	1,300	1,127
Depreciation and amortization		375	487	1,268	1,366
Other taxes		83	71	248	223
Impairment of assets and other charges (benefits)		40	(15)	38	30
Total operating expenses		1,786	1,826	5,330	5,311
Income from operations		976	819	2,458	1,970
Other income (expense)		58	(1)	159	83
Interest and related charges	[2]	239	215	633	578
Income before income tax expense		795	603	1,984	1,475
Income tax expense		141	128	386	311
Net Income Including Noncontrolling Interests				1,598	1,164
Net Income		$ 654	$ 475	$ 1,598	$ 1,164

[1] Includes income tax expense (benefit) of $( 10 ) million and $ 1.2 billion for the three months ended September 30, 2024 and 2023 , respectively, and $ 22 million and $ 1.3 billion for the nine months ended September 30, 2024 and 2023 , respectively. See Note 19 for amounts attributable to affiliates.

Consolidated Statements of In_2

Consolidated Statements of Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Income tax expense (benefit) from discontinued operations	$ (10)	$ 1,200	$ 22	$ 1,300

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net income including noncontrolling interests		$ 954	$ 157	$ 2,200	$ 1,721
Net income (loss) attributable to Dominion Energy		954	157	2,200	1,721
Other comprehensive income (loss), net of taxes:
Net deferred gains (losses) on derivatives-hedging activities	[1]	(7)	19	2	16
Changes in unrealized net gains (losses) on investment securities	[2]	32	(22)	13	(6)
Changes in net unrecognized pension and other postretirement benefit costs	[3]	4	0	(249)	0
Amounts reclassified to net income (loss):
Net derivative (gains) losses-hedging activities	[4]	8	8	24	24
Net realized (gains) losses on investment securities	[5]	(1)	2	5	1
Net pension and other postretirement benefit costs (credits)	[6]	(3)	(8)	57	(31)
Net earnings from equity method investees	[7]	0	3	0	3
Changes in other comprehensive income from equity method investees	[8]	0	(1)	0	0
Total other comprehensive income (loss)		33	1	(148)	7
Comprehensive income including noncontrolling interests		987	158	2,052	1,728
Comprehensive income attributable to Dominion Energy		987	158	2,052	1,728
Virginia Electric and Power Company
Net income including noncontrolling interests				1,598	1,164
Net income (loss) attributable to Dominion Energy		654	475	1,598	1,164
Other comprehensive income (loss), net of taxes:
Net deferred gains (losses) on derivatives-hedging activities	[9]	(7)	18	2	15
Changes in unrealized net gains (losses) on investment securities	[10]	6	(3)	2	0
Amounts reclassified to net income (loss):
Net realized (gains) losses on investment securities	[11]	(1)	0	1	0
Total other comprehensive income (loss)		(2)	15	5	15
Comprehensive income attributable to Dominion Energy		$ 652	$ 490	$ 1,603	$ 1,179

[1] Net of $ 3 million and $ ( 6 ) million tax for the three months ended September 30, 2024 and 2023, respectively, and net of $ — million and $ ( 5 ) million tax for the nine months ended September 30, 2024 and 2023 , respectively. Net of $ ( 10 ) million and $ 6 million tax for the three months ended September 30, 2024 and 2023 , respectively, and net of $ ( 2 ) million and $ 2 million tax for the nine months ended September 30, 2024 and 2023 , respectively. Net of $ ( 2 ) million and $ — million tax for the three months ended September 30, 2024 and 2023, respectively, and net of $ 86 million and $ — million tax for the nine months ended September 30, 2024 and 2023 , respectively. Net of $ ( 3 ) million and $ ( 3 ) million tax for the three months ended September 30, 2024 and 2023, respectively, and net of $ ( 9 ) million and $ ( 8 ) million tax for the nine months ended September 30, 2024 and 2023 , respectively. Net of $ 1 million and $ — million tax for the three months ended September 30, 2024 and 2023, respectively, and net of $ ( 1 ) million and $ — million tax for the nine months ended September 30, 2024 and 2023 , respectively. Net of $ 1 million and $ 7 million tax for the three months ended September 30, 2024 and 2023, respectively, and net of $ ( 20 ) million and $ 15 million tax for the nine months ended September 30, 2024 and 2023 , respectively. Net of $ — million and $ ( 1 ) million tax for the three months ended September 30, 2024 and 2023 , respectively, and net of $ — million and $ ( 1 ) million tax for the nine months ended September 30, 2024 and 2023 , respectively. Net of $ — million and $ — million tax for the three months ended September 30, 2024 and 2023 , respectively, and net of $ — million and $ — million tax for the nine months ended September 30, 2024 and 2023 , respectively. Net of $ 3 million and $ ( 7 ) million tax for the three months ended September 30, 2024 and 2023 , respectively, and net of $ — million and $ ( 6 ) million tax for the nine months ended September 30, 2024 and 2023 , respectively. Net of $ ( 2 ) million and $ — million tax for the three months ended September 30, 2024 and 2023, respectively, and net of $ ( 1 ) million and $ — million tax for the nine months ended September 30, 2024 and 2023 , respectively. Net of $ ( 1 ) million and $ — million tax for the three months ended September 30, 2024 and 2023 , respectively, and net of $ ( 1 ) million and $ — million tax for the nine months ended September 30, 2024 and 2023 , respectively.

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net deferred gains (losses) on derivatives-hedging activities, tax	$ 3	$ (6)	$ 0	$ (5)
Changes in unrealized net gains (losses) on investment securities, tax	(10)	6	(2)	2
Changes in net unrecognized pension and other postretirement benefit costs, tax	(2)	0	86	0
Net derivative (gains) losses-hedging activities, tax	(3)	(3)	(9)	(8)
Net realized (gains) losses on investment securities, tax	1	0	(1)	0
Net pension and other postretirement benefit costs (credits), tax	1	7	(20)	15
Net equity method investees, tax	0	(1)	0	(1)
Changes in other comprehensive income from equity method investees, tax	0	0	0	0
Virginia Electric and Power Company
Net deferred gains (losses) on derivatives-hedging activities, tax	3	(7)	0	(6)
Changes in unrealized net gains (losses) on investment securities, tax	(2)	0	(1)	0
Net realized (gains) losses on investment securities, tax	$ (1)	$ 0	$ (1)	$ 0

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions		Sep. 30, 2024	Dec. 31, 2023
Current Assets
Cash and cash equivalents		$ 1,776	$ 184	[1]
Customer receivables (less allowance for doubtful accounts)		2,082	2,251	[1]
Other receivables (less allowance for doubtful accounts)		265	258	[1]
Inventories		1,717	1,698	[1]
Derivative assets		545	699
Regulatory assets	[2]	1,030	1,309	[1]
Other	[2]	550	459	[1]
Current assets held for sale		26	18,529	[1]
Total current assets		7,991	25,387	[1]
Investments
Nuclear decommissioning trust funds		8,017	6,946	[1]
Investment in equity method affiliates		134	268	[1]
Other		348	324	[1]
Total investments		8,499	7,538	[1]
Property, Plant and Equipment
Property, plant and equipment		91,164	83,417	[1]
Accumulated depreciation and amortization		(25,742)	(24,637)	[1]
Total property, plant and equipment, net		65,422	58,780	[1]
Deferred Charges and Other Assets
Goodwill		4,143	4,143	[1]
Regulatory assets	[2]	8,352	8,356	[1]
Other		5,413	4,828	[1]
Total deferred charges and other assets		17,908	17,327	[1]
Total assets		99,820	109,032	[1]
Current Liabilities
Securities due within one year	[2]	1,820	6,589	[1]
Supplemental credit facility borrowings		0	450	[1]
Short-term debt		4,104	3,956	[1]
Accounts payable		937	921	[1]
Accrued interest, payroll and taxes	[2]	1,354	1,075	[1]
Regulatory liabilities		714	522	[1]
Derivative liabilities		107	346
Other	[3]	1,796	1,732	[1]
Current liabilities held for sale		0	8,885	[1]
Total current liabilities		10,832	24,476	[1]
Long-Term Debt
Long-term debt		33,779	32,368	[1]
Securitization bonds	[2]	1,136	0	[1]
Junior subordinated notes		1,981	688	[1]
Other		205	192	[1]
Total long-term debt		37,101	33,248	[1]
Deferred Credits and Other Liabilities
Deferred income taxes		6,404	6,611	[1]
Deferred investment tax credits		1,077	1,098	[1]
Regulatory liabilities		8,995	8,674	[1]
Asset retirement obligations		6,584	5,641	[1]
Other		1,296	1,755	[1]
Total deferred credits and other liabilities		24,356	23,779	[1]
Total liabilities		72,289	81,503	[1]
Commitments and Contingencies (see Note 17)
Shareholders' Equity
Preferred stock (see Note 16)		1,348	1,783	[1]
Common stock - no par	[4]	23,854	23,728	[1]
Retained earnings		3,983	3,524	[1]
Accumulated other comprehensive (loss) income		(1,654)	(1,506)	[1]
Shareholders' equity		27,531	27,529	[1]
Noncontrolling interests		0	0	[1]
Total shareholders' equity		27,531	27,529	[1]
Total liabilities and shareholders' equity		99,820	109,032	[1]
Virginia Electric and Power Company
Current Assets
Cash and cash equivalents		28	90	[5]
Customer receivables (less allowance for doubtful accounts)		1,618	1,728	[5]
Other receivables (less allowance for doubtful accounts)		115	121	[5]
Affiliated receivables		73	50	[5]
Inventories		1,125	1,085	[5]
Derivative assets	[6]	135	234	[5]
Regulatory assets	[7]	751	868	[5]
Other	[7]	271	141	[5]
Total current assets		4,116	4,317	[5]
Investments
Nuclear decommissioning trust funds		4,266	3,716	[5]
Other		4	4	[5]
Total investments		4,270	3,720	[5]
Property, Plant and Equipment
Property, plant and equipment		67,498	60,963	[5]
Accumulated depreciation and amortization		(17,908)	(17,096)	[5]
Total property, plant and equipment, net		49,590	43,867	[5]
Deferred Charges and Other Assets
Regulatory assets	[7]	4,561	4,317	[5]
Other	[6]	2,595	2,397	[5]
Total deferred charges and other assets		7,156	6,714	[5]
Total assets		65,132	58,618	[5]
Current Liabilities
Securities due within one year		540	381	[5]
Short-term debt		740	455	[5]
Accounts payable		656	597	[5]
Payables to affiliates		95	111	[5]
Affiliated current borrowings		633	500	[5]
Accrued interest, payroll and taxes		493	293	[5]
Regulatory liabilities		516	321	[5]
Derivative liabilities		80	244	[5]
Other		1,328	1,285	[5]
Total current liabilities		5,081	4,187	[5]
Long-Term Debt
Long-term debt		18,872	17,043	[5]
Securitization bonds		1,136	0	[5]
Other		96	72	[5]
Total long-term debt		20,104	17,115	[5]
Deferred Credits and Other Liabilities
Deferred income taxes		4,073	3,624	[5]
Deferred investment tax credits		645	656	[5]
Regulatory liabilities		6,395	5,978	[5]
Asset retirement obligations		4,728	4,276	[5]
Other		1,096	1,125	[5]
Total deferred credits and other liabilities		16,937	15,659	[5]
Total liabilities		42,122	36,961	[5]
Commitments and Contingencies (see Note 17)
Shareholders' Equity
Common stock - no par	[8]	8,987	8,987	[5]
Other paid-in capital		1,113	1,113	[5]
Retained earnings		12,889	11,541	[5]
Accumulated other comprehensive (loss) income		21	16	[5]
Shareholders' equity		23,010	21,657	[5]
Total liabilities and shareholders' equity		$ 65,132	$ 58,618	[5]

[1] Dominion Energy’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. See Note 15 for amounts attributable to VIEs. See Note 10 for amounts attributable to related parties. 1.8 billion shares authorized; 840 million shares outstanding at September 30, 2024 and 838 million shares outstanding at December 31, 2023 . Virginia Power’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. See Note 19 for amounts attributable to affiliates. See Note 15 for amounts attributable to VIEs. 500,000 shares authorized; 324,245 shares outstanding at both September 30, 2024 and December 31, 2023 .

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Customer receivables, allowance for doubtful accounts	$ 30	$ 38
Other receivables, allowance for doubtful accounts	$ 2	$ 1
Common stock, shares authorized	1,800,000,000	1,800,000,000
Common stock, shares outstanding	840,000,000	838,000,000
Virginia Electric and Power Company
Customer receivables, allowance for doubtful accounts	$ 22	$ 30
Other receivables, allowance for doubtful accounts	$ 2	$ 1
Common stock, shares authorized	500,000	500,000
Common stock, shares outstanding	324,245	324,245

Consolidated Statements of Equi

Consolidated Statements of Equity (Unaudited) - USD ($) $ in Millions	Total		Preferred Stock	Common Stock	Retained Earnings	AOCI	Total Shareholders' Equity	Noncontrolling Interests
Beginning balance at Dec. 31, 2022	$ 27,659		$ 1,783	$ 23,605	$ 3,843	$ (1,572)	$ 27,659	$ 0
Beginning balance (in shares) at Dec. 31, 2022			2,000,000	835,000,000
Net income including noncontrolling interests	1,721				1,721		1,721	0
Issuance of stock	91			$ 91			91
Issuance of stock (in shares)				2,000,000
Stock awards (net of change in unearned compensation)	24			$ 24			24
Preferred stock dividends (see Note 16)	(60)				(60)		(60)
Common stock dividends and distributions	(1,674)				(1,674)		(1,674)	0
Other comprehensive income (loss), net of tax	7					7	7
Ending balance at Sep. 30, 2023	27,768		$ 1,783	$ 23,720	3,830	(1,565)	27,768	0
Ending balance (in shares) at Sep. 30, 2023			2,000,000	837,000,000
Beginning balance at Jun. 30, 2023	28,174		$ 1,783	$ 23,704	4,253	(1,566)	28,174	0
Beginning balance (in shares) at Jun. 30, 2023			2,000,000	837,000,000
Net income including noncontrolling interests	157				157		157	0
Issuance of stock	6			$ 6			6
Issuance of stock (in shares)				0
Stock awards (net of change in unearned compensation)	10			$ 10			10
Preferred stock dividends (see Note 16)	(20)				(20)		(20)
Common stock dividends and distributions	(559)				(559)		(559)	0
Other comprehensive income (loss), net of tax	1					1	1
Other	(1)				(1)		(1)
Ending balance at Sep. 30, 2023	27,768		$ 1,783	$ 23,720	3,830	(1,565)	27,768	0
Ending balance (in shares) at Sep. 30, 2023			2,000,000	837,000,000
Beginning balance at Dec. 31, 2023	27,529	[1]	$ 1,783	$ 23,728	3,524	(1,506)	27,529	0
Beginning balance (in shares) at Dec. 31, 2023			2,000,000	838,000,000
Net income including noncontrolling interests	2,200				2,200		2,200	0
Issuance of stock	102			$ 102			102
Issuance of stock (in shares)				2,000,000
Stock awards (net of change in unearned compensation) (in shares)				0
Stock awards (net of change in unearned compensation)	24			$ 24			24
Repurchase of preferred stock	(435)		$ (435)				(435)
Repurchase of preferred stock, Shares			(1,000,000)	0
Preferred stock dividends (see Note 16)	(63)				(63)		(63)
Common stock dividends and distributions	(1,678)				(1,678)		(1,678)	0
Other comprehensive income (loss), net of tax	(148)					(148)	(148)
Ending balance at Sep. 30, 2024	27,531		$ 1,348	$ 23,854	3,983	(1,654)	27,531	0
Ending balance (in shares) at Sep. 30, 2024			1,000,000	840,000,000
Beginning balance at Jun. 30, 2024	27,073		$ 1,348	$ 23,809	3,603	(1,687)	27,073	0
Beginning balance (in shares) at Jun. 30, 2024			1,000,000	839,000,000
Net income including noncontrolling interests	954				954		954
Issuance of stock	35			$ 35			35
Issuance of stock (in shares)				1,000,000
Stock awards (net of change in unearned compensation)	9			$ 9			9
Preferred stock dividends (see Note 16)	(15)				(15)		(15)
Common stock dividends and distributions	(559)				(559)		(559)
Other comprehensive income (loss), net of tax	33					33	33
Other	1			1			1
Ending balance at Sep. 30, 2024	$ 27,531		$ 1,348	$ 23,854	$ 3,983	$ (1,654)	$ 27,531	$ 0
Ending balance (in shares) at Sep. 30, 2024			1,000,000	840,000,000

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

Consolidated Statements of Eq_2

Consolidated Statements of Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share	$ 0.6675	$ 0.6675	$ 2.0025	$ 2.0025

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Operating Activities
Net income including noncontrolling interests	$ 2,200	$ 1,721
Adjustments to reconcile net income including noncontrolling interests to net cash provided by operating activities:
Depreciation, depletion and amortization (including nuclear fuel)	2,014	2,372
Deferred income taxes	(274)	1,439
Deferred investment tax credits (benefits)	(23)	(37)
Impairment of assets and other charges	251	169
Losses from East Ohio, Questar Gas and PSNC Transactions	165
Gains on sales of assets and equity method investments (including Cove Point)		(657)
Net gains on nuclear decommissioning trust funds and other investments	(589)	(228)
Other adjustments	60	106
Changes in:
Accounts receivable	379	516
Inventories	(47)	(148)
Deferred fuel and purchased gas costs, net	768	635
Prepayments and deposits, net	(14)	375
Accounts payable	(27)	(812)
Accrued interest, payroll and taxes	224	208
Net realized and unrealized changes related to derivative activities	(34)	180
Pension and other postretirement benefits	(446)	(357)
Other operating assets and liabilities	(230)	(296)
Net cash provided by operating activities	4,377	5,186
Investing Activities
Plant construction and other property additions (including nuclear fuel)	(8,719)	(7,166)
Acquisition of solar development projects	(202)	(14)
Proceeds from sale of noncontrolling interest in Cove Point		3,293
Proceeds from East Ohio, Questar Gas and PSNC Transactions	9,237
Proceeds from sales of securities	2,230	2,007
Purchases of securities	(2,350)	(2,182)
Proceeds from sale of assets	35	32
Contributions to equity method affiliates	(14)	(79)
Distributions from equity method affiliates	126	1
Other	(50)	17
Net cash provided by (used in) investing activities	293	(4,091)
Financing Activities
Issuance of short-term debt, net	148	362
364-day term loan facility borrowings	3,000	3,475
Repayment of 364-day term loan facility borrowings	(7,750)	(750)
Issuance and remarketing of long-term debt	4,743	2,660
Repayment and repurchase of long-term debt	(1,884)	(5,673)
Issuance of securitization bonds	1,282
Supplemental credit facility borrowings		900
Supplemental credit facility repayments	(450)	(450)
Repurchase of preferred stock	(440)
Issuance of common stock	102	91
Common dividend payments	(1,678)	(1,674)
Other	(142)	(130)
Net cash provided by (used in) financing activities	(3,069)	(1,189)
Increase (decrease) in cash, restricted cash and equivalents	1,601	(94)
Cash, restricted cash and equivalents at beginning of period	301	341
Cash, restricted cash and equivalents at end of period	1,902	247
Virginia Electric and Power Company
Operating Activities
Net income including noncontrolling interests	1,598	1,164
Adjustments to reconcile net income including noncontrolling interests to net cash provided by operating activities:
Depreciation, depletion and amortization (including nuclear fuel)	1,386	1,486
Deferred income taxes	381	453
Deferred investment tax credits (benefits)	(11)	(11)
Impairment of assets and other charges (benefits)	37	44
Net gains on nuclear decommissioning trust funds and other investments	(85)	(31)
Other adjustments	(20)	16
Changes in:
Accounts receivable	89	(41)
Affiliated receivables and payables	(38)	(225)
Inventories	(41)	(98)
Deferred fuel and purchased gas costs, net	345	487
Prepayments and deposits, net	11	267
Accounts payable	41	(80)
Accrued interest, payroll and taxes	200	168
Net realized and unrealized changes related to derivative activities	136	541
Other operating assets and liabilities	(94)	(100)
Net cash provided by operating activities	3,935	4,040
Investing Activities
Plant construction and other property additions	(6,885)	(4,871)
Purchases of nuclear fuel	(122)	(128)
Acquisition of solar development projects	(27)	(14)
Proceeds from sales of securities	1,370	1,254
Purchases of securities	(1,449)	(1,363)
Other	(25)	34
Net cash provided by (used in) investing activities	(7,138)	(5,088)
Financing Activities
Issuance of short-term debt, net	285	1
Issuance (repayment) of affiliated current borrowings, net	133	(230)
Issuance and remarketing of long-term debt	2,443	2,660
Repayment and repurchase of long-term debt	(593)	(1,308)
Issuance of securitization bonds	1,282	0
Common dividend payments	(250)	0
Other	(55)	(62)
Net cash provided by (used in) financing activities	3,245	1,061
Increase (decrease) in cash, restricted cash and equivalents	42	13
Cash, restricted cash and equivalents at beginning of period	90	24
Cash, restricted cash and equivalents at end of period	$ 132	$ 37

Virginia Electric and Power Com

Virginia Electric and Power Company Consolidated Statements of Common Shareholder's Equity (Unaudited) - USD ($) shares in Thousands, $ in Millions	Total		Common Stock	Retained Earnings	AOCI	Virginia Electric and Power Company		Virginia Electric and Power Company Common Stock	Virginia Electric and Power Company Other Paid-In Capital	Virginia Electric and Power Company Retained Earnings	Virginia Electric and Power Company AOCI
Beginning balance at Dec. 31, 2022					$ (1,572)	$ 16,949		$ 5,738	$ 1,113	$ 10,089	$ 9
Beginning balance (in shares) at Dec. 31, 2022			835,000					275
Net Income (Loss)	$ 1,721					1,164				1,164
Other comprehensive income (loss), net of tax	7				7	15					15
Ending balance at Sep. 30, 2023					(1,565)	18,128		$ 5,738	1,113	11,253	24
Ending balance (in shares) at Sep. 30, 2023			837,000					275
Beginning balance at Jun. 30, 2023					(1,566)	17,638		$ 5,738	1,113	10,778	9
Beginning balance (in shares) at Jun. 30, 2023			837,000					275
Net Income (Loss)	157					475				475
Other comprehensive income (loss), net of tax	1				1	15					15
Other	1			$ 1
Ending balance at Sep. 30, 2023					(1,565)	18,128		$ 5,738	1,113	11,253	24
Ending balance (in shares) at Sep. 30, 2023			837,000					275
Beginning balance at Dec. 31, 2023	27,529	[1]			(1,506)	21,657	[2]	$ 8,987	1,113	11,541	16
Beginning balance (in shares) at Dec. 31, 2023			838,000					324
Net Income (Loss)	2,200					1,598				1,598
Dividends						(250)				(250)
Other comprehensive income (loss), net of tax	(148)				(148)	5					5
Ending balance at Sep. 30, 2024	27,531				(1,654)	23,010		$ 8,987	1,113	12,889	21
Ending balance (in shares) at Sep. 30, 2024			840,000					324
Beginning balance at Jun. 30, 2024					(1,687)	22,359		$ 8,987	1,113	12,236	23
Beginning balance (in shares) at Jun. 30, 2024			839,000					324
Net Income (Loss)	954					654				654
Other comprehensive income (loss), net of tax	33				33	(2)					(2)
Other	(1)		$ (1)			(1)				(1)
Ending balance at Sep. 30, 2024	$ 27,531				$ (1,654)	$ 23,010		$ 8,987	$ 1,113	$ 12,889	$ 21
Ending balance (in shares) at Sep. 30, 2024			840,000					324

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

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 954	$ 157	$ 2,200	$ 1,721

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Nature of Operations

Nature of Operations	9 Months Ended
Nature of Operations	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	Note 1. Nature of Operations Dominion Energy, headquartered in Richmond, Virginia, is one of the nation’s largest producers and distributors of energy. Dominion Energy’s operations are conducted through various subsidiaries, including Virginia Power. Dominion Energy’s operations also include DESC, a regulated public utility serving electric and gas customers in South Carolina, and nonregulated electric generation. See Note 3 for a description of the sale of regulated gas distribution operations to Enbridge including the East Ohio Transaction, which was completed in March 2024, the Questar Gas Transaction, which was completed in May 2024, and the PSNC Transaction, which was completed in September 2024. Virginia Power is a regulated public utility that generates, transmits and distributes electricity for sale in Virginia and northeastern North Carolina. Virginia Power is a member of PJM, an RTO, and its electric transmission facilities are integrated into the PJM wholesale electricity markets. All of Virginia Power’s stock is owned by Dominion Energy.

Significant Accounting Policies

Significant Accounting Policies	9 Months Ended
Significant Accounting Policies	Sep. 30, 2024
Accounting Policies [Abstract]
Significant Accounting Policies	Note 2. Significant Accounting Policies As permitted by the rules and regulations of the SEC, the Companies’ accompanying unaudited Consolidated Financial Statements contain certain condensed financial information and exclude certain footnote disclosures normally included in annual audited consolidated financial statements prepared in accordance with GAAP. These unaudited Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and Notes in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. In the Companies’ opinion, the accompanying unaudited Consolidated Financial Statements contain all adjustments necessary to present fairly their financial position at September 30, 2024, their results of operations and changes in equity for the three and nine months ended September 30, 2024 and 2023 and their cash flows for the nine months ended September 30, 2024 and 2023 . Such adjustments are normal and recurring in nature unless otherwise noted. The Companies make certain estimates and assumptions in preparing their Consolidated Financial Statements in accordance with GAAP. These estimates and assumptions affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses for the periods presented. Actual results may differ from those estimates. The Companies’ accompanying unaudited Consolidated Financial Statements include, after eliminating intercompany transactions and balances, their accounts, those of their respective majority-owned subsidiaries and non-wholly-owned entities in which they have a controlling financial interest. For certain partnership structures, income is allocated based on the liquidation value of the underlying contractual arrangements. The results of operations for interim periods are not necessarily indicative of the results expected for the full year. Information for quarterly periods is affected by seasonal variations in sales, rate changes, electric fuel and other energy-related purchases, purchased gas expenses and other factors. Certain amounts in the Companies’ 2023 Consolidated Financial Statements and Notes have been reclassified to conform to the 2024 presentation for comparative purposes; however, such reclassifications did not affect the Companies’ net income, total assets, liabilities, equity or cash flows. Amounts disclosed for Dominion Energy are inclusive of Virginia Power, where applicable. There have been no significant changes from Note 2 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023, with the exception of the items described below. Cash, Restricted Cash and Equivalents Restricted Cash and Equivalents The following table provides a reconciliation of the total cash, restricted cash and equivalents reported within the Companies’ Consolidated Balance Sheets to the corresponding amounts reported within the Companies’ Consolidated Statements of Cash Flows for the nine months ended September 30, 2024 and 2023: Cash, Restricted Cash and Equivalents Cash, Restricted Cash and Equivalents September 30, 2024 September 30, 2023 December 31, 2023 December 31, 2022 (millions) Dominion Energy Cash and cash equivalents (1) $ 1,776 $ 176 $ 217 $ 153 Restricted cash and equivalents (2)(4) 126 71 84 188 Cash, restricted cash and equivalents shown in the $ 1,902 $ 247 $ 301 $ 341 Virginia Power Cash and cash equivalents $ 28 $ 37 $ 90 $ 22 Restricted cash and equivalents (3)(4) 104 — — 2 Cash, restricted cash and equivalents shown in the $ 132 $ 37 $ 90 $ 24 (1) At September 30, 2023, December 31, 2023 and December 31, 2022, Dominion Energy had $ 39 million, $ 33 million and $ 34 million, respectively, of cash and cash equivalents included in current assets held for sale. (2) At September 30, 2023, December 31, 2023 and December 31, 2022, Dominion Energy had $ 4 million, $ 4 million and $ 2 million, respectively, of restricted cash and equivalents included in current assets held for sale with the remaining balances presented within other current assets in Dominion Energy’s Consolidated Balance Sheets. (3) Restricted cash and equivalents balances are presented within other current assets in Virginia Power’s Consolidated Balance Sheets. (4) Includes $ 100 million attributable to VIEs at September 30, 2024 . Supplemental Cash Flow Information The following table provides supplemental disclosure of cash flow information related to Dominion Energy: Nine Months Ended September 30, 2024 2023 (millions) Significant noncash investing and financing activities: (1) Accrued capital expenditures $ 930 $ 884 Leases (2) 183 294 (1) See Notes 3 and 17 for noncash financing activities related to debt assumed with closing of the East Ohio Transaction, the Questar Gas Transaction and the PSNC Transaction and the transfer of property associated with the settlement of litigation. (2) Includes $ 100 million and $ 51 million of financing leases at September 30, 2024 and 2023 , respectively, and $ 83 million and $ 243 million of operating leases at September 30, 2024 and 2023 , respectively. The following table provides supplemental disclosure of cash flow information related to Virginia Power: Nine Months Ended September 30, 2024 2023 (millions) Significant noncash investing and financing activities: Accrued capital expenditures $ 738 $ 646 Leases (1) 156 253 (1) Includes $ 89 million and $ 44 million of financing leases at September 30, 2024 and 2023 , respectively, and $ 67 million and $ 209 million of operating leases at September 30, 2024 and 2023 , respectively. Property, Plant and Equipment Virginia Power recorded a $ 25 million ($ 18 million after-tax) charge during the third quarter of 2024 within impairment of assets and other charges in its Consolidated Statements of Income related to the write-off of early-stage development costs associated with a hydroelectric pumped storage facility that it is no longer considering constructing. Asset Retirement Obligations In May 2024, the EPA released a final rule to regulate inactive surface impoundments located at retired generating stations that contained CCR and liquids after October 2015, and certain other inactive or previously closed surface impoundments, landfills or other areas that contain accumulations of CCR. Dominion Energy believes that it may have inactive or closed units or areas that could be subject to the final rule at up to 19 different stations, including 12 at Virginia Power. In connection with this rule, in the second quarter of 2024, Dominion Energy and Virginia Power recorded an increase to their AROs of $ 1.1 billion and $ 420 million, respectively, with a corresponding increase of $ 536 million and $ 234 million, respectively, to regulatory assets for amounts recoverable through retail electric rates, including riders, for electric generation stations that have been retired, $ 505 million and $ 152 million, respectively, to property, plant and equipment for amounts recoverable for electric generation stations that are currently in service and $ 34 million to other deferred charges and other assets for amounts associated with non-jurisdictional customers at Virginia Power. In the third quarter of 2024, Dominion Energy recorded an adjustment to decrease the ARO and related property, plant and equipment by $ 215 million to reflect updated information concerning one facility. The actual AROs related to CCRs may vary substantially from the estimates used to record the obligation. New Accounting Standards Climate-Related Disclosures In March 2024, the SEC issued guidance for climate-related disclosures. The guidance requires disclosure of the financial statement impacts of severe weather events and other natural conditions, including amounts capitalized or expensed as well as any associated recoveries. In addition, the guidance requires disclosure of amounts related to renewable energy credits or carbon offsets if utilized as a material component of plans to achieve climate-related targets or goals. This guidance, which is currently subject to a stay issued by the SEC, would be effective for the fiscal year beginning January 1, 2025. The Companies expect this guidance to only impact their disclosures with no impacts to their results of operations, cash flows or financial condition.

Acquisitions and Dispositions

Acquisitions and Dispositions	9 Months Ended
Acquisitions and Dispositions	Sep. 30, 2024
Text Block [Abstract]
Acquisitions and Dispositions	Note 3. Acquisitions and Dispositions Business Review Dispositions Sale of East Ohio In September 2023, Dominion Energy entered into an agreement with Enbridge for the East Ohio Transaction, which included the sale of East Ohio and was valued at approximately $ 6.6 billion, consisting of a purchase price of approximately $ 4.3 billion in cash and approximately $ 2.3 billion of assumed indebtedness. The sale closed in March 2024 after all customary closing and regulatory conditions were satisfied, including clearance or approval under or by the Hart-Scott-Rodino Act, CFIUS and FCC. Dominion Energy utilized the after-tax proceeds, as required, to repay outstanding borrowings under 364-day term loan facilities. See Note 16 for additional information. The purchase price was subject to customary post-closing adjustments, including adjustments for cash, indebtedness, net working capital, capital expenditures and net regulatory assets and liabilities. The transaction was structured as a stock sale for tax purposes. In October 2023, as required under the sale agreement, Dominion Energy filed a notice with the Ohio Commission. The internal reorganization in connection with the East Ohio Transaction was subject to approval by the Utah and Wyoming Commissions. Dominion Energy filed for such approvals in September 2023 which were received in November 2023. The internal reorganization was completed in February 2024. Dominion Energy retained the pension and other postretirement benefit plan assets and obligations, including related income tax and other deferred balances, associated with retiree participants in both East Ohio’s union pension and other postretirement benefit plans and retiree participants of the sale entities in the Dominion Energy Pension Plan and the Dominion Energy Retiree Health and Welfare Plan. Dominion Energy recognized a pre-tax loss of $ 102 million ($ 113 million after-tax) upon the closing of the transaction, including the write-off of $ 1.5 billion of goodwill which was not deductible for tax purposes and including the effects of final closing adjustments. In 2023, Dominion Energy recorded a charge of $ 29 million to reflect the recognition of deferred taxes on the outside basis of East Ohio’s stock upon meeting the classification as held for sale. These deferred taxes reversed in the first quarter of 2024 upon closing of the sale and became a component of current income tax expense on the loss on sale disclosed above. See Note 5 for additional information. At the closing of the East Ohio Transaction, Dominion Energy and Enbridge entered into a transition services agreement pursuant to which Dominion Energy will continue to provide certain services to support the ongoing operations of East Ohio for up to approximately two years. Enbridge has also agreed to provide certain services to Dominion Energy. Sale of PSNC In September 2023, Dominion Energy entered into an agreement with Enbridge for the PSNC Transaction, which included the sale of PSNC. The sale closed in September 2024 after all customary closing and regulatory conditions were satisfied, including clearance or approval under or by the Hart-Scott-Rodino Act, CFIUS, FCC and North Carolina Commission. At closing, the transaction was valued at $ 3.3 billion, consisting of a purchase price of $ 2.0 billion in cash and $ 1.3 billion of assumed indebtedness. The purchase price is subject to customary post-closing adjustments, including adjustments for cash, indebtedness, net working capital, capital expenditures and net regulatory assets and liabilities. The transaction was structured as a stock sale for tax purposes. The internal reorganization in connection with the PSNC Transaction was subject to approval by the North Carolina Commission. Dominion Energy filed for such approval in September 2023 which was received in November 2023. The internal reorganization was completed in December 2023. Dominion Energy retained the entirety of the assets and obligations, including related income tax and other deferred balances, of the pension and other postretirement employee benefit plans associated with the operations included in the transaction and relating to services provided through closing. Dominion Energy recognized a pre-tax loss of $ 33 million ($ 30 million after-tax loss) upon the closing of the transaction, including the write-off of $ 0.7 billion of goodwill which is not deductible for tax purposes but excluding the effects of final closing adjustments. In 2023, Dominion Energy recorded a charge of $ 334 million to reflect the deferred taxes on the outside basis of PSNC’s stock upon meeting the classification as held for sale. Dominion Energy recorded an additional charge of $ 16 million to adjust these deferred taxes to recorded balances as of June 30, 2024. These deferred taxes reversed in the third quarter of 2024 upon closing of the sale and became a component of current income tax expense on the pre-tax loss on sale disclosed above. See Note 5 for additional information. At the closing of the PSNC Transaction, Dominion Energy and Enbridge entered into a transition services agreement pursuant to which Dominion Energy will continue to provide certain services to support the ongoing operations of PSNC for up to approximately two years. Enbridge has also agreed to provide certain services to Dominion Energy. Sale of Questar Gas and Wexpro In September 2023, Dominion Energy entered into an agreement with Enbridge for the Questar Gas Transaction, which included the sale of Questar Gas, Wexpro and related affiliates and was valued at approximately $ 4.3 billion, consisting of a purchase price of approximately $ 3.0 billion in cash and approximately $ 1.3 billion of assumed indebtedness. The sale closed in May 2024 after all customary closing and regulatory conditions were satisfied, including clearance or approval under or by the Hart-Scott-Rodino Act, CFIUS, FCC and Utah and Wyoming Commissions. Dominion Energy utilized the after-tax proceeds, as required, to repay outstanding borrowings under a 364-day term loan facility. See Note 16 for additional information. The purchase price was subject to customary post-closing adjustments, including adjustments for cash, indebtedness, net working capital, capital expenditures and net regulatory assets and liabilities. The transaction was structured as a stock sale for tax purposes. In October 2023, as required under the sale agreement, Dominion Energy filed the notice with the Idaho Commission. The internal reorganization in connection with the Questar Gas Transaction was subject to approval by the Utah and Wyoming Commissions. Dominion Energy filed for such approvals in September 2023 which were received in November 2023. The internal reorganization was completed in February 2024. Dominion Energy retained the pension and other postretirement benefit plan assets and obligations, including related income tax and other deferred balances, associated with retiree participants of the sale entities in the Dominion Energy Pension Plan and the Dominion Energy Retiree Health and Welfare Plan. Dominion Energy recognized a pre-tax loss of $ 30 million ($ 18 million after-tax gain) upon the closing of the transaction, including the write-off of $ 0.7 billion of goodwill which was not deductible for tax purposes and including the effects of final closing adjustments. In 2023, Dominion Energy recorded a charge of $ 284 million ($ 279 million after-tax), including amounts associated with an impairment of goodwill. Based on the recorded balances at March 31, 2024, Dominion Energy recorded an additional charge of $ 78 million ($ 78 million after-tax), including amounts associated with an impairment of goodwill, in the first quarter of 2024. Following the internal reorganization noted above and upon closing of the East Ohio Transaction, Dominion Energy recorded a tax benefit of $ 5 million. In 2023, Dominion Energy recorded a charge of $ 462 million to reflect the deferred taxes on the outside basis of Questar Gas, Wexpro and related affiliates’ stock upon meeting the classification as held for sale. These deferred taxes reversed in the first quarter of 2024 and became a component of current income tax expense. In addition, Dominion Energy recorded an incremental deferred tax benefit of $ 22 million to reflect the deferred taxes on the outside basis of Questar Gas, Wexpro and related affiliates’ stock in the first quarter of 2024. These deferred taxes reversed in the second quarter of 2024 upon closing of the sale and became a component of current income tax expense on the pre-tax loss on sale disclosed above. See Note 5 for additional information. At the closing of the Questar Gas Transaction, Dominion Energy and Enbridge entered into a transition services agreement pursuant to which Dominion Energy will continue to provide certain services to support the ongoing operations of Questar Gas and Wexpro for up to approximately two years. Enbridge has also agreed to provide certain services to Dominion Energy. Other Sales In February 2024, Dominion Energy entered into an agreement with AES to sell Birdseye and the Madison solar project for approximately $ 17 million in cash, subject to customary closing adjustments, which closed in April 2024. Dominion Energy had previously recognized a charge of $ 68 million ($ 51 million after-tax) in the fourth quarter of 2023 to adjust the assets down to their realizable fair value. As a result, the gain on the sale recognized by Dominion Energy in the second quarter of 2024, including the effects of final closing adjustments, was inconsequential. Financial Statement Information for Business Review Dispositions The following table represents selected information regarding the results of operations, which were reported within discontinued operations in Dominion Energy’s Consolidated Statements of Income: Three Months Ended Nine Months Ended PSNC Transaction (1) East Ohio (1) PSNC (1) Questar Gas (1) Other (millions) Operating revenue $ 81 $ 229 $ 488 $ 894 $ — Operating expense (2) 91 254 312 746 ( 8 ) Other income (expense) 5 ( 17 ) 11 2 — Interest and related charges 16 15 44 25 — Income (loss) before income taxes ( 21 ) ( 57 ) 143 125 8 Income tax expense (benefit) ( 9 ) 9 44 46 — Net income (loss) attributable to Dominion Energy (3) $ ( 12 ) $ ( 66 ) $ 99 $ 79 $ 8 (1) Represents amounts attributable to Dominion Energy prior to the closing of the East Ohio Transaction which closed on March 6, 2024, the PSNC Transaction which closed on September 30, 2024 and the Questar Gas Transaction which closed on May 31, 2024. (2) East Ohio Transaction includes a charge of $ 45 million ($ 33 million after-tax) associated with an increase to certain pension retirement benefits attributable to a plan amendment and a contribution to the defined contribution employee savings plan. See Note 20 for further information on these transactions. (3) Excludes $ 2 million and $( 71 ) million of income tax expense (benefit) attributable to consolidated state adjustments for the three and nine months ended September 30, 2024 , respectively. Three Months Ended September 30, 2023 Nine Months Ended September 30, 2023 East Ohio Transaction PSNC Transaction Questar Gas Transaction Other East Ohio PSNC Questar Gas Other (millions) Operating revenue $ 214 $ 86 $ 150 $ 2 $ 761 $ 532 $ 1,151 $ 5 Operating expense (1) 128 80 127 7 497 386 939 29 Other income (expense) 7 3 3 — 22 8 6 — Interest and related charges 19 13 17 — 51 38 50 1 Income (loss) before income taxes 74 ( 4 ) 9 ( 5 ) 235 116 168 ( 25 ) Income tax expense (benefit) (2) 39 383 525 ( 2 ) 58 409 557 ( 7 ) Net income (loss) attributable to Dominion Energy (3) $ 35 $ ( 387 ) $ ( 516 ) $ ( 3 ) $ 177 $ ( 293 ) $ ( 389 ) $ ( 18 ) (1) Other includes a charge of $ 15 million ($ 11 million after-tax) recorded in the second quarter of 2023 associated with the impairment of certain nonregulated solar assets. (2) Includes amounts recorded in the third quarter of 2023 to reflect the recognition of deferred taxes on the outside basis of the applicable entities’ stock upon meeting the classification as held for sale. (3) Excludes $ 6 million and $ 2 million of income tax expense attributable to consolidated state and interim period tax allocation adjustments for the three and nine months ended September 30, 2023 , respectively. The carrying value of major classes of assets and liabilities relating to the disposal groups, which are reported as held for sale in Dominion Energy’s Consolidated Balance Sheets, were as follows: At December 31, 2023 East Ohio Transaction PSNC Transaction Questar Gas Transaction Other (millions) Current assets (1) $ 497 $ 336 $ 764 $ 1 Property, plant and equipment, net 5,443 2,806 4,369 26 Other deferred charges and other assets, (2) and intangible assets 2,659 834 766 — Current liabilities (3) 560 224 389 7 Long-term debt 2,286 948 1,205 — Other deferred credits and liabilities (4) 1,437 711 1,116 2 (1) Includes cash and cash equivalents of $ 4 million and regulatory assets of $ 75 million within the East Ohio Transaction, cash and cash equivalents of $ 2 million and regulatory assets of $ 89 million within the PSNC Transaction and cash and cash equivalents of $ 26 million and regulatory assets of $ 297 million within the Questar Gas Transaction at December 31, 2023. (2) I ncludes goodwill of $ 1.5 billion and regulatory assets of $ 781 million within the East Ohio Transaction, goodwill of $ 673 million and regulatory assets of $ 86 million within the PSNC Transaction and goodwill of $ 720 million and regulatory assets of $( 39 ) million within the Questar Gas Transaction at December 31, 2023. (3) Includes regulatory liabilities of $ 54 million within the East Ohio Transaction, $ 44 million within the PSNC Transaction and $ 55 million within the Questar Gas Transaction at December 31, 2023. (4) Includes regulatory liabilities of $ 711 million within the East Ohio Transaction, $ 435 million within the PSNC Transaction and $ 502 million within the Questar Gas Transaction at December 31, 2023. Capital expenditures and significant noncash items relating to the disposal groups included the following: Nine Months Ended September 30, 2024 Nine Months Ended September 30, 2023 East Ohio Transaction (1) PSNC Transaction (1) Questar Gas Transaction (1) Other East Ohio Transaction PSNC Transaction Questar Gas Transaction Other (millions) Capital expenditures $ 65 $ 287 $ 160 $ — $ 355 $ 153 $ 290 $ — Significant noncash items Depreciation, depletion — — — — 109 67 130 2 Accrued capital expenditures 53 22 33 — (1) Represents amounts attributable to Dominion Energy prior to the closing of the East Ohio Transaction which closed on March 6, 2024, the PSNC Transaction which closed on September 30, 2024 and the Questar Gas Transaction which closed on May 31, 2024, respectively.

Operating Revenue

Operating Revenue	9 Months Ended
Operating Revenue	Sep. 30, 2024
Text Block [Abstract]
Operating Revenue	Note 4. Operating Revenue The Companies’ operating revenue consists of the following: Dominion Energy Virginia Power Quarter-to-Date Year-to-Date Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 2024 2023 2024 2023 (millions) Regulated electric sales: Residential $ 1,535 $ 1,558 $ 4,184 $ 3,968 $ 1,155 $ 1,133 $ 3,183 $ 2,975 Commercial 1,248 1,236 3,533 3,453 998 962 2,851 2,745 Industrial 216 227 642 658 113 109 330 324 Government and other retail 303 288 812 764 285 269 763 711 Wholesale 39 53 108 133 29 37 82 88 Nonregulated electric sales 239 229 693 611 30 22 69 55 Regulated gas sales: Residential 30 28 223 207 Commercial 24 25 100 106 Other 15 19 50 58 Regulated gas transportation and storage 6 4 15 13 Other regulated revenue 87 61 293 204 84 57 282 193 Other nonregulated revenues (1)(2)(3) 43 30 111 115 11 9 30 42 Total operating revenue from contracts with customers 3,785 3,758 10,764 10,290 2,705 2,598 7,590 7,133 Other revenues (1)(4) 156 52 295 569 57 47 198 148 Total operating revenue $ 3,941 $ 3,810 $ 11,059 $ 10,859 $ 2,762 $ 2,645 $ 7,788 $ 7,281 (1) See Note 19 for amounts attributable to affiliates. (2) Sales of renewable energy credits were $ 10 million and $ 7 million for the three months ended September 30, 2024 and 2023, respectively, and $ 22 million and $ 36 million for the nine months ended September 30, 2024 and 2023, respectively, at Dominion Energy and $ 4 million and $ 2 million for the three months ended September 30, 2024 and 2023, respectively, and $ 9 million and $ 24 million for the nine months ended September 30, 2024 and 2023, respectively, at Virginia Power. (3) Includes revenue from transition services agreements of $ 17 million and $ 3 million for the three months ended September 30, 2024 and 2023, respectively, and $ 34 million and $ 16 million for the nine months ended September 30, 2024 and 2023, respectively, at Dominion Energy. (4) Includes alternative revenue of $ 24 million and $ 34 million for the three months ended September 30, 2024 and 2023, respectively, and $ 85 million and $ 111 million for the nine months ended September 30, 2024 and 2023, respectively, at both Dominion Energy and Virginia Power. Neither Dominion Energy nor Virginia Power have any amounts for revenue to be recognized in the future on multi-year contracts in place at September 30, 2024 . At September 30, 2024 and December 31, 2023 , Dominion Energy’s contract liability balances were $ 50 million and $ 47 million, respectively, and are recorded in other current liabilities and other deferred credits and other liabilities in its Consolidated Balance Sheets. At September 30, 2024 and December 31, 2023 , Virginia Power’s contract liability balances were $ 43 million and $ 40 million, respectively, and are recorded in other current liabilities and other deferred credits and other liabilities in its Consolidated Balance Sheets. The Companies recognize revenue as they fulfill their obligations to provide service to their customers. During the nine months ended September 30, 2024 and 2023 , Dominion Energy recognized revenue of $ 45 million and $ 48 million, respectively, from the beginning contract liability balances. During the nine months ended September 30, 2024 and 2023 , Virginia Power recognized $ 40 million and $ 39 million, respectively, from the beginning contract liability balances.

Income Taxes

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Note 5. Income Taxes For continuing operations, including noncontrolling interests, the statutory U.S. federal income tax rate reconciles to the Companies’ effective income tax rate as follows: Dominion Energy Virginia Power Nine Months Ended September 30, 2024 2023 2024 2023 U.S. statutory rate 21.0 % 21.0 % 21.0 % 21.0 % Increases (reductions) resulting from: State taxes, net of federal benefit 3.3 3.9 4.4 4.6 Investment tax credits ( 1.2 ) ( 1.5 ) ( 0.8 ) ( 0.7 ) Production tax credits ( 2.8 ) ( 0.6 ) ( 3.0 ) ( 0.9 ) Reversal of excess deferred income taxes ( 2.4 ) ( 2.6 ) ( 1.8 ) ( 2.6 ) Changes in state deferred taxes associated — 1.3 — — AFUDC - equity ( 0.6 ) ( 0.1 ) ( 0.6 ) — Other, net ( 0.4 ) ( 0.8 ) 0.3 ( 0.3 ) Effective tax rate 16.9 % 20.6 % 19.5 % 21.1 % The IRA created a nuclear production tax credit for electricity produced and sold beginning in 2024. The amount of the credit to be realized, if any, is a function of annual qualified production levels and gross receipts determined for each of the Companies’ nuclear units that cannot be fully determined until the completion of the calendar year. For the nine months ended September 30, 2024 , Virginia Power recorded a $ 53 million tax benefit which represents a prorated portion of the estimated net realizable value of the nuclear production tax credit. The ultimate nuclear production tax credit realized by the Companies could vary significantly based on actual market prices, qualifying production and/or final computational U.S. Treasury guidance. Dominion Energy’s effective tax rate for the nine months ended September 30, 2023, includes a net income tax expense of $ 29 million associated with the remeasurement of consolidated state deferred taxes as a result of the East Ohio, PSNC and Questar Gas Transactions and the sale of Dominion Energy's 50 % noncontrolling partnership interest in Cove Point. See Notes 3 and 10 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023, for a discussion of these transactions. As of September 30, 2024, there have been no material changes in the Companies’ unrecognized tax benefits or possible changes that could reasonably be expected to occur during the next twelve months. See Note 5 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023, for a discussion of these unrecognized tax benefits. Discontinued operations Income tax expense reflected in discontinued operations is $ 22 million and $ 1.3 billion for the nine months ended September 30, 2024 and 2023 , respectively. Dominion Energy entered into agreements for the East Ohio, PSNC and Questar Gas Transactions in September 2023, each of which was treated as a stock sale for income tax purposes. During 2023 in connection with the pending sales, Dominion Energy recorded a charge of $ 825 million to establish deferred tax liabilities to reflect the excess of financial reporting basis over tax basis in stock of the entities to be sold. See Note 3 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023, for a discussion of these transactions. Dominion Energy recorded a tax benefit of $ 52 million for the nine months ended September 30, 2024, including the reversal of $ 841 million of the deferred tax liabilities associated with the East Ohio, Questar Gas and PSNC Transactions previously established during 2023 and 2024. See Note 3 for additional information.

Earnings Per Share

Earnings Per Share	9 Months Ended
Earnings Per Share	Sep. 30, 2024
Earnings Per Share [Abstract]
Earnings Per Share	Note 6. Earnings Per Share The following table presents the calculation of Dominion Energy’s basic and diluted EPS: Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 (millions, except EPS) Net income attributable to Dominion Energy from $ 967 $ 698 $ 2,018 $ 1,813 Preferred stock dividends (see Note 16) ( 15 ) ( 20 ) ( 54 ) ( 60 ) Preferred stock deemed dividends (see Note 16) — — ( 9 ) — Net income attributable to Dominion Energy from 952 678 $ 1,955 $ 1,753 Net income (loss) attributable to Dominion Energy from $ ( 13 ) $ ( 541 ) $ 182 $ ( 92 ) Average shares of common stock outstanding - Basic 839.0 836.8 838.3 836.0 Net effect of dilutive securities (1) 0.3 — 0.1 0.2 Average shares of common stock outstanding - Diluted 839.3 836.8 838.4 836.2 EPS from continuing operations - Basic $ 1.14 $ 0.81 $ 2.33 $ 2.10 EPS from discontinued operations - Basic ( 0.02 ) ( 0.65 ) $ 0.22 ( 0.11 ) EPS attributable to Dominion Energy - Basic $ 1.12 $ 0.16 $ 2.55 $ 1.99 EPS from continuing operations - Diluted $ 1.14 $ 0.81 $ 2.33 $ 2.10 EPS from discontinued operations - Diluted ( 0.02 ) ( 0.65 ) $ 0.22 ( 0.11 ) EPS attributable to Dominion Energy - Diluted $ 1.12 $ 0.16 $ 2.55 $ 1.99 (1) Dilutive securities for the three and nine months ended September 30, 2024 consists of certain of the forward sales agreements entered into in the second and third quarters of 2024 (applying the treasury stock method). Dilutive securities for the nine months ended September 30, 2023 include stock potentially to be issued to satisfy the obligation under a settlement agreement with the SCDOR (applying the if converted method). See Notes 16 and 17 for additional information. Certain of the forward sales agreements entered into in the second and third quarters of 2024 were potentially dilutive securities but were excluded from the calculation of diluted EPS from continuing operations for the three and nine months ended September 30, 2024 as the dilutive stock price threshold was not met.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
Accumulated Other Comprehensive Income (Loss)	Sep. 30, 2024
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Note 7. Accumulated Other Comprehensive Income (Loss) Dominion Energy The following table presents Dominion Energy’s changes in AOCI (net of tax) and reclassifications out of AOCI by component: Total Derivative-Hedging Activities (1)(2) Investment (3) Pension (4) Equity Method Investees (5) Total (millions) Three Months Ended September 30, 2024 Beginning balance $ ( 191 ) $ ( 13 ) $ ( 1,483 ) $ — $ ( 1,687 ) Other comprehensive income (loss) before ( 7 ) 32 4 — 29 Amounts reclassified from AOCI: (gains) losses Interest and related charges 11 — — — 11 Other income (expense) — ( 2 ) ( 4 ) — ( 6 ) Total 11 ( 2 ) ( 4 ) — 5 Income tax expense (benefit) ( 3 ) 1 1 — ( 1 ) Total, net of tax 8 ( 1 ) ( 3 ) — 4 Net current period other comprehensive 1 31 1 — 33 Ending balance $ ( 190 ) $ 18 $ ( 1,482 ) $ — $ ( 1,654 ) Three Months Ended September 30, 2023 Beginning balance $ ( 236 ) $ ( 29 ) $ ( 1,299 ) $ ( 2 ) $ ( 1,566 ) Other comprehensive income (loss) before 19 ( 22 ) — ( 1 ) ( 4 ) Amounts reclassified from AOCI: (gains) losses Interest and related charges 11 — — — 11 Discontinued operations — — — 4 4 Other income (expense) — 2 ( 15 ) — ( 13 ) Total 11 2 ( 15 ) 4 2 Income tax expense (benefit) ( 3 ) — 7 ( 1 ) 3 Total, net of tax 8 2 ( 8 ) 3 5 Net current period other comprehensive 27 ( 20 ) ( 8 ) 2 1 Ending balance $ ( 209 ) $ ( 49 ) $ ( 1,307 ) $ — $ ( 1,565 ) (1) Comprised entirely of interest rate derivative hedging activities. (2) Net of $ 64 million, $ 64 million, $ 70 million and $ 79 million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. (3) Net of $( 5 ) million, $ 3 million, $ 16 million and $ 9 million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. (4) Net of $ 522 million, $ 522 million, $ 461 million and $ 453 million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. (5) Net of $ — million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. Total Derivative-Hedging Activities (1)(2) Investment (3) Pension (4) Equity Method Investees (5) Total (millions) Nine Months Ended September 30, 2024 Beginning balance $ ( 216 ) $ — $ ( 1,290 ) $ — $ ( 1,506 ) Other comprehensive income (loss) before 2 13 ( 249 ) — ( 234 ) Amounts reclassified from AOCI: (gains) losses Interest and related charges 33 — — — 33 Other income (expense) — 6 77 — 83 Total 33 6 77 — 116 Income tax expense (benefit) ( 9 ) ( 1 ) ( 20 ) — ( 30 ) Total, net of tax 24 5 57 — 86 Net current period other comprehensive 26 18 ( 192 ) — ( 148 ) Ending balance $ ( 190 ) $ 18 $ ( 1,482 ) $ — $ ( 1,654 ) Nine Months Ended September 30, 2023 Beginning balance $ ( 249 ) $ ( 44 ) $ ( 1,276 ) $ ( 3 ) $ ( 1,572 ) Other comprehensive income (loss) before 16 ( 6 ) — — 10 Amounts reclassified from AOCI: (gains) losses Interest and related charges 32 — — — 32 Discontinued operations — — — 4 4 Other income (expense) — 1 ( 46 ) — ( 45 ) Total 32 1 ( 46 ) 4 ( 9 ) Income tax expense (benefit) ( 8 ) — 15 ( 1 ) 6 Total, net of tax 24 1 ( 31 ) 3 ( 3 ) Net current period other comprehensive 40 ( 5 ) ( 31 ) 3 7 Ending balance $ ( 209 ) $ ( 49 ) $ ( 1,307 ) $ — $ ( 1,565 ) (1) Comprised entirely of interest rate derivative hedging activities. (2) Net of $ 64 million, $ 73 million, $ 70 million and $ 83 million tax at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively. (3) Net of $( 5 ) million, $( 2 ) million, $ 16 million and $ 13 million tax at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively. (4) Net of $ 522 million, $ 456 million, $ 461 million and $ 445 million tax at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively. (5) Net of $ — million tax at September 30, 2024, December 31, 2023, September 30, 2023 and $ 1 million tax at December 31, 2022, respectively. Virginia Power The following table presents Virginia Power’s changes in AOCI (net of tax) and reclassifications out of AOCI by component: Total Derivative-Hedging Activities (1)(2) Investment (3) Total (millions) Three Months Ended September 30, 2024 Beginning balance $ 24 $ ( 1 ) $ 23 Other comprehensive income (loss) before ( 7 ) 6 ( 1 ) Amounts reclassified from AOCI: (gains) losses Interest and related charges — — — Other income (expense) — — — Total — — — Income tax expense (benefit) — ( 1 ) ( 1 ) Total, net of tax — ( 1 ) ( 1 ) Net current period other comprehensive income (loss) ( 7 ) 5 ( 2 ) Ending balance $ 17 $ 4 $ 21 Three Months Ended September 30, 2023 Beginning balance $ 13 $ ( 4 ) $ 9 Other comprehensive income (loss) before 18 ( 3 ) 15 Amounts reclassified from AOCI: (gains) losses Interest and related charges (benefit) 1 — 1 Other income (expense) — — — Total 1 — 1 Income tax expense (benefit) ( 1 ) — ( 1 ) Total, net of tax — — — Net current period other comprehensive income (loss) 18 ( 3 ) 15 Ending balance $ 31 $ ( 7 ) $ 24 (1) Comprised entirely of interest rate derivative hedging activities. (2) Net of $( 6 ) million, $( 8 ) million, $( 11 ) million and $( 4 ) million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. (3) Net of $( 2 ) million, $ — million, $ 3 million and $ 1 million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. Total Derivative-Hedging Activities (1)(2) Investment (3) Total (millions) Nine Months Ended September 30, 2024 Beginning balance $ 15 $ 1 $ 16 Other comprehensive income (loss) before 2 2 4 Amounts reclassified from AOCI: (gains) losses Interest and related charges — — — Other income (expense) — 2 2 Total — 2 2 Income tax expense (benefit) — ( 1 ) ( 1 ) Total, net of tax — 1 1 Net current period other comprehensive income (loss) 2 3 5 Ending balance $ 17 $ 4 $ 21 Nine Months Ended September 30, 2023 Beginning balance $ 16 $ ( 7 ) $ 9 Other comprehensive income (loss) before 15 — 15 Amounts reclassified from AOCI: (gains) losses Interest and related charges 1 — 1 Other income (expense) — — — Total 1 — 1 Income tax expense (benefit) ( 1 ) — ( 1 ) Total, net of tax — — — Net current period other comprehensive income (loss) 15 — 15 Ending balance $ 31 $ ( 7 ) $ 24 (1) Comprised entirely of interest rate derivative hedging activities. (2) Net of $( 6 ) million, $( 5 ) million, $( 11 ) million and $( 5 ) million tax at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively. (3) Net of $( 2 ) million, $ — million, $ 3 million and $ 2 million tax at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
Fair Value Measurements	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 8. Fair Value Measurements The Companies’ fair value measurements are made in accordance with the policies discussed in Note 2 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. See Note 9 in this report for additional information about the Companies’ derivatives and hedge accounting activities. The Companies enter into certain physical and financial forwards, futures and options, which are considered Level 3 as they have one or more inputs that are not observable and are significant to the valuation. The discounted cash flow method is used to value Level 3 physical and financial forwards and futures contracts. An option model is used to value Level 3 physical options. The discounted cash flow model for forwards and futures calculates mark-to-market valuations based on forward market prices, original transaction prices, volumes, risk-free rate of return and credit spreads. The inputs into the option models are the forward market prices, implied price volatilities, risk-free rate of return, the option expiration dates, the option strike prices, the original sales prices and volumes. For Level 3 fair value measurements, certain forward market prices and implied price volatilities are considered unobservable. The following table presents the Companies’ quantitative information about Level 3 fair value measurements at September 30, 2024. The range and weighted average are presented in dollars for market price inputs and percentages for price volatility. Dominion Energy Virginia Power Valuation Unobservable Fair Value (millions) Range Weighted (1) Fair Value (millions) Range Weighted (1) Assets Physical and financial forwards: Natural gas (2) Discounted Market price (3) $ 8 ( 2 )- 4 ( 1 ) $ 8 ( 2 )- 3 ( 1 ) FTRs Discounted Market price (3) 72 ( 4 )- 11 4 72 ( 4 )- 11 4 Electricity Discounted Market price (3) 186 27 - 118 48 Physical options: Natural gas (2) Option model Market price (3) 16 1 - 5 3 13 1 - 5 3 Price volatility (4) 10 %- 71 % 46 % 14 %- 71 % 52 % Total assets $ 282 $ 93 Liabilities Physical and financial forwards: FTRs Discounted Market price (3) 1 ( 6 )- 7 1 1 ( 6 )- 7 1 Electricity Discounted Market price (3) 11 35 - 118 62 Physical options: Natural gas (2) Option model Market price (per Dth) (3) 1 1 - 3 2 1 1 - 3 2 Price volatility (4) 44 %- 54 % 50 % 44 %- 54 % 50 % Total liabilities $ 13 $ 2 (1) Averages weighted by volume. (2) Includes basis. (3) Represents market prices beyond defined terms for Levels 1 and 2. (4) Represents volatilities unrepresented in published markets. Sensitivity of the fair value measurements to changes in the significant unobservable inputs is as follows: Significant Unobservable Inputs Position Change to Input Impact on Fair Value Measurement Market price Buy Increase (decrease) Gain (loss) Market price Sell Increase (decrease) Loss (gain) Price volatility Buy Increase (decrease) Gain (loss) Price volatility Sell Increase (decrease) Loss (gain) Nonrecurring Fair Value Measurements See Note 11 for information regarding impairment charges recorded by Dominion Energy associated with corporate office buildings and nonregulated renewable natural gas facilities. In the second quarter of 2023, Dominion Energy recorded a charge of $ 15 million ($ 11 million after-tax) presented within discontinued operations in its Consolidated Statements of Income to adjust certain nonregulated solar assets down to their estimated fair value, using a market approach, of $ 22 million. The valuation is considered a Level 2 fair value measurement given that it is based on bids received. As discussed in Note 3 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023, these assets were sold in August 2023. Recurring Fair Value Measurements The following table presents the Companies’ assets and liabilities that are measured at fair value on a recurring basis for each hierarchy level, including both current and noncurrent portions: Dominion Energy Virginia Power Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (millions) September 30, 2024 Assets Derivatives: Commodity $ — $ 168 $ 282 $ 450 $ — $ 53 $ 93 $ 146 Interest rate — 702 — 702 — 45 — 45 Foreign currency exchange rate — 8 — 8 — 8 — 8 Investments (1) : Equity securities: U.S. 5,473 — — 5,473 2,818 — — 2,818 Fixed income: Corporate debt instruments — 578 — 578 — 351 — 351 Government securities — 1,605 — 1,605 — 912 — 912 Other 141 — — 141 96 — — 96 Cash equivalents and other — 2 — 2 — 2 — 2 Total assets $ 5,614 $ 3,063 $ 282 $ 8,959 $ 2,914 $ 1,371 $ 93 $ 4,378 Liabilities Derivatives: Commodity $ — $ 96 $ 13 $ 109 $ — $ 58 $ 2 $ 60 Interest rate — 20 — 20 — — — — Foreign currency exchange rate — 52 — 52 — 52 — 52 Total liabilities $ — $ 168 $ 13 $ 181 $ — $ 110 $ 2 $ 112 December 31, 2023 Assets Derivatives: Commodity $ — $ 325 $ 225 $ 550 $ — $ 96 $ 21 $ 117 Interest rate — 800 — 800 — 181 — 181 Investments (1) : Equity securities: U.S. 4,527 — — 4,527 2,362 — — 2,362 Fixed income: Corporate debt instruments — 500 — 500 — 274 — 274 Government securities 219 1,238 — 1,457 129 687 — 816 Cash equivalents and other 31 — — 31 20 — — 20 Total assets $ 4,777 $ 2,863 $ 225 $ 7,865 $ 2,511 $ 1,238 $ 21 $ 3,770 Liabilities Derivatives: Commodity $ — $ 160 $ 139 $ 299 $ — $ 95 $ 137 $ 232 Interest rate — 359 — 359 — 45 — 45 Foreign currency exchange rate — 39 — 39 — 39 — 39 Total liabilities $ — $ 558 $ 139 $ 697 $ — $ 179 $ 137 $ 316 (1) Includes investments held in the nuclear decommissioning trusts and rabbi trusts. Excludes $ 211 million and $ 457 million of assets at Dominion Energy, inclusive of $ 77 million and $ 217 million at Virginia Power, at September 30, 2024 and December 31, 2023 , respectively, measured at fair value using NAV (or its equivalent) as a practical expedient which are not required to be categorized in the fair value hierarchy. The following table presents the net change in the Companies’ assets and liabilities measured at fair value on a recurring basis and included in the Level 3 fair value category: Dominion Energy Virginia Power Quarter-to-Date Year-to-Date Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 2024 2023 2024 2023 (millions) Beginning balance $ 360 $ 134 $ 86 $ 422 $ 105 $ ( 3 ) $ ( 116 ) $ 221 Total realized and unrealized gains (losses): Included in earnings: Operating revenue 13 ( 10 ) 7 ( 8 ) Electric fuel and other energy- purchases 14 ( 103 ) ( 134 ) ( 191 ) 10 ( 107 ) ( 136 ) ( 195 ) Discontinued operations ( 3 ) 1 ( 4 ) 1 Included in regulatory assets/ ( 77 ) ( 174 ) 230 ( 463 ) ( 7 ) ( 176 ) 219 ( 400 ) Settlements ( 40 ) 103 54 174 ( 17 ) 107 103 179 Purchases 2 — 30 16 — — 21 16 Ending balance $ 269 $ ( 49 ) $ 269 $ ( 49 ) $ 91 $ ( 179 ) $ 91 $ ( 179 ) Dominion Energy had $ 12 million and $ 7 million of unrealized gains included in earnings in the Level 3 fair value category related to assets/liabilities still held at the reporting date for the three and nine months ended September 30, 2024 , respectively, and $( 10 ) million and $( 8 ) million of unrealized losses included in earnings in the Level 3 fair value category related to assets/liabilities still held at the reporting date for the three and nine months ended September 30, 2023 . Virginia Power had no unrealized gains or losses for the three and nine months ended September 30, 2024 and 2023. Fair Value of Financial Instruments Substantially all of the Companies’ financial instruments are recorded at fair value, with the exception of the instruments described below, which are reported at historical cost. Estimated fair values have been determined using available market information and valuation methodologies considered appropriate by management. The carrying amount of cash, restricted cash and equivalents, customer and other receivables, affiliated receivables, short-term debt, affiliated current borrowings, payables to affiliates and accounts payable are representative of fair value because of the short-term nature of these instruments. For the Companies’ financial instruments that are not recorded at fair value, the carrying amounts and estimated fair values are as follows: Dominion Energy Virginia Power Carrying Estimated (1) Carrying Estimated (1) (millions) September 30, 2024 Long-term debt (2) $ 34,555 $ 33,818 $ 19,221 $ 18,571 Supplemental credit facility borrowings — — Securitization bonds (3) 1,282 1,315 1,282 1,315 Junior subordinated notes (2) 2,666 2,853 December 31, 2023 Long-term debt (2) $ 42,526 $ 40,539 $ 17,392 $ 16,418 Supplemental credit facility borrowings 450 450 Junior subordinated notes (2) 1,388 1,374 (1) Fair value is estimated using market prices, where available, and interest rates currently available for issuance of debt with similar terms and remaining maturities. All fair value measurements are classified as Level 2. The carrying amount of debt issuances with short-term maturities and variable rates refinanced at current market rates is a reasonable estimate of their fair value. (2) Carrying amount includes current portions included in securities due within one year and amounts which represent the unamortized debt issuance costs and discount or premium. There were no fair value hedges associated with fixed-rate debt at September 30, 2024 and December 31, 2023. Additionally, Dominion Energy carrying amounts include portions classified as current liabilities held for sale at December 31, 2023 . (3) Carrying amount includes current portions included in securities due within one year.

Derivatives and Hedge Accountin

Derivatives and Hedge Accounting Activities	9 Months Ended
Derivatives and Hedge Accounting Activities	Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedge Accounting Activities	Note 9. Derivatives and Hedge Accounting Activities The Companies’ accounting policies, objectives and strategies for using derivative instruments and cash collateral or other instruments under master netting or similar arrangements are discussed in Notes 2 and 7 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. See Note 8 in this report for additional information about fair value measurements and associated valuation methods for derivatives. See Note 18 for additional information regarding credit-related contingent features for the Companies’ derivative instruments. Balance Sheet Presentation The tables below present the Companies’ derivative asset and liability balances by type of financial instrument, if the gross amounts recognized in their Consolidated Balance Sheets were netted with derivative instruments and cash collateral received or paid: Dominion Energy Gross Amounts Not Offset in the Consolidated Balance Sheet Virginia Power Gross Amounts Not Offset in the Consolidated Balance Sheet Gross Assets (1) Financial Cash Net Gross Assets (1) Financial Cash Net (millions) September 30, 2024 Commodity contracts: Over-the-counter $ 185 $ 28 $ — $ 157 $ 132 $ 15 $ — $ 117 Exchange 104 46 — 58 3 2 — 1 Interest rate contracts: Over-the-counter 702 17 — 685 45 — — 45 Foreign currency exchange rate contracts: Over-the-counter 8 8 — — 8 8 — — Total derivatives, $ 999 $ 99 $ — $ 900 $ 188 $ 25 $ — $ 163 December 31, 2023 Commodity contracts: Over-the-counter $ 289 $ 26 $ — $ 263 $ 112 $ 13 $ — $ 99 Exchange 118 33 15 70 4 3 — 1 Interest rate contracts: Over-the-counter 800 191 — 609 181 11 — 170 Total derivatives, $ 1,207 $ 250 $ 15 $ 942 $ 297 $ 27 $ — $ 270 (1) Excludes derivative assets of $ 161 million and $ 143 million at Dominion Energy and $ 11 million and $ 1 million at Virginia Power at September 30, 2024 and December 31, 2023 , respectively, which are not subject to master netting or other similar arrangements. Dominion Energy Gross Amounts Not Offset in the Consolidated Balance Sheet Virginia Power Gross Amounts Not Offset in the Consolidated Balance Sheet Gross Liabilities (1) Financial Cash Net Gross Liabilities (1) Financial Cash Net (millions) September 30, 2024 Commodity contracts: Over-the-counter $ 59 $ 28 $ — $ 31 $ 21 $ 15 $ — $ 6 Exchange 46 46 — — 2 2 — — Interest rate contracts: Over-the-counter 20 17 — 3 — — — — Foreign currency exchange rate contracts: Over-the-counter 52 8 — 44 52 8 — 44 Total derivatives, $ 177 $ 99 $ — $ 78 $ 75 $ 25 $ — $ 50 December 31, 2023 Commodity contracts: Over-the-counter $ 266 $ 26 $ 30 $ 210 $ 153 $ 13 $ 30 $ 110 Exchange 33 33 — — 3 3 — — Interest rate contracts: Over-the-counter 359 186 — 173 45 6 — 39 Foreign currency exchange rate contracts: Over-the-counter 39 5 — 34 39 5 — 34 Total derivatives, $ 697 $ 250 $ 30 $ 417 $ 240 $ 27 $ 30 $ 183 (1) Excludes derivative liabilities of $ 4 million at Dominion Energy at September 30, 2024 and $ 37 million and $ 76 million at Virginia Power at September 30, 2024 and December 31, 2023 , respectively, which are not subject to master netting or similar arrangements. Dominion Energy did no t have any derivative liabilities at December 31, 2023 which were not subject to master netting or similar arrangements. AOCI The following table presents selected information related to gains (losses) on cash flow hedges included in AOCI in the Companies’ Consolidated Balance Sheets at September 30, 2024: Dominion Energy Virginia Power AOCI After-Tax Amounts Expected to be Maximum Term AOCI After-Tax Amounts Expected to be Maximum Term (millions) Interest rate $ ( 190 ) $ ( 30 ) 375 months $ 17 $ 1 375 months Total $ ( 190 ) $ ( 30 ) $ 17 $ 1 The amounts that will be reclassified from AOCI to earnings will generally be offset by the recognition of the hedged transactions (e.g., interest rate payments) in earnings, thereby achieving the realization of prices contemplated by the underlying risk management strategies and will vary from the expected amounts presented above as a result of changes in interest rates. Fair Value and Gains and Losses on Derivative Instruments The following table presents the fair values of the Companies’ derivatives and where they are presented in their Consolidated Balance Sheets: Dominion Energy Virginia Power Fair Value – Fair Value – Total Fair Fair Value – Fair Value – Total Fair (millions) At September 30, 2024 ASSETS Current Assets Commodity $ — $ 235 $ 235 $ — $ 130 $ 130 Interest rate — 305 305 — — — Foreign currency — 5 5 — 5 5 Total current derivative assets — 545 545 — 135 135 Noncurrent Assets Commodity — 215 215 — 16 16 Interest rate 45 352 397 45 — 45 Foreign currency — 3 3 — 3 3 Total noncurrent derivative assets (1) 45 570 615 45 19 64 Total derivative assets $ 45 $ 1,115 $ 1,160 $ 45 $ 154 $ 199 LIABILITIES Current Liabilities Commodity $ — $ 81 $ 81 $ — $ 54 $ 54 Interest rate — — — — — — Foreign currency exchange rate — 26 26 — 26 26 Total current derivative liabilities — 107 107 — 80 80 Noncurrent Liabilities Commodity — 28 28 — 6 6 Interest rate — 20 20 — — — Foreign currency exchange rate — 26 26 — 26 26 Total noncurrent derivative liabilities (2) — 74 74 — 32 32 Total derivative liabilities $ — $ 181 $ 181 $ — $ 112 $ 112 At December 31, 2023 ASSETS Current Assets Commodity $ — $ 312 $ 312 $ — $ 91 $ 91 Interest rate 143 298 441 143 — 143 Total current derivative assets (3) 143 610 753 143 91 234 Noncurrent Assets Commodity — 238 238 — 26 26 Interest rate 38 321 359 38 — 38 Total noncurrent derivative assets (1) 38 559 597 38 26 64 Total derivative assets $ 181 $ 1,169 $ 1,350 $ 181 $ 117 $ 298 LIABILITIES Current Liabilities Commodity $ — $ 244 $ 244 $ — $ 188 $ 188 Interest rate 45 76 121 45 — 45 Foreign currency exchange rate — 11 11 — 11 11 Total current derivative liabilities (4) 45 331 376 45 199 244 Noncurrent Liabilities Commodity — 55 55 — 44 44 Interest rate — 238 238 — — — Foreign currency exchange rate — 28 28 — 28 28 Total noncurrent derivative liabilities (2) — 321 321 — 72 72 Total derivative liabilities $ 45 $ 652 $ 697 $ 45 $ 271 $ 316 (1) Noncurrent derivative assets are presented in other deferred charges and other assets in the Companies’ Consolidated Balance Sheets. (2) Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in the Companies’ Consolidated Balance Sheets. (3) Includes $ 54 million recorded in current assets held for sale in Dominion Energy’s Consolidated Balance Sheets at December 31, 2023. (4) Includes $ 30 million recorded in current liabilities held for sale in Dominion Energy’s Consolidated Balance Sheets at December 31, 2023. The following tables present the gains and losses on the Companies’ derivatives, as well as where the associated activity is presented in their Consolidated Balance Sheets and Statements of Income. Dominion Energy Virginia Power Derivatives in cash flow Amount of Gain (1) Amount of Gain Increase (Decrease) (2) Amount of Gain (1) Amount of Gain Increase (Decrease) (2) (millions) Three Months Ended September 30, 2024 Derivative type and location of gains (losses): Interest rate (3) $ ( 10 ) $ ( 11 ) $ ( 110 ) $ ( 10 ) $ — $ ( 109 ) Total $ ( 10 ) $ ( 11 ) $ ( 110 ) $ ( 10 ) $ — $ ( 109 ) Three Months Ended September 30, 2023 Derivative type and location of gains (losses): Interest rate (3) $ 25 ( 11 ) $ 268 $ 25 $ ( 1 ) $ 267 Total $ 25 $ ( 11 ) $ 268 $ 25 $ ( 1 ) $ 267 Nine Months Ended September 30, 2024 Derivative type and location of gains (losses): Interest rate (3) $ 2 $ ( 33 ) $ 20 $ 2 $ — $ 20 Total $ 2 $ ( 33 ) $ 20 $ 2 $ — $ 20 Nine Months Ended September 30, 2023 Derivative type and location of gains (losses): Interest rate (3) $ 21 $ ( 32 ) $ 236 $ 21 $ ( 1 ) $ 235 Total $ 21 $ ( 32 ) $ 236 $ 21 $ ( 1 ) $ 235 (1) Amounts deferred into AOCI have no associated effect in the Companies’ Consolidated Statements of Income. (2) Represents net derivative activity deferred into and amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in the Companies’ Consolidated Statements of Income. (3) Amounts recorded in the Companies’ Consolidated Statements of Income are classified in interest and related charges. Amount of Gain (Loss) Recognized in Income on Derivatives (1)(2) Derivatives not designated as hedging instruments Dominion Energy Virginia Power Quarter-to-Date Year-to-Date Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 2024 2023 2024 2023 (millions) Derivative type and location of gains (losses): Commodity: Operating revenue $ 123 $ 7 $ 184 $ 428 $ 31 $ 6 $ 107 $ 25 Electric fuel and other energy-related 2 ( 149 ) ( 188 ) ( 267 ) ( 1 ) ( 151 ) ( 188 ) ( 270 ) Operations and maintenance — — — 2 — — — 2 Discontinued operations ( 3 ) — ( 28 ) 94 Interest rate: Interest and related charges 77 274 ( 14 ) 227 Discontinued operations — ( 7 ) — 17 Total $ 199 $ 125 $ ( 46 ) $ 501 $ 30 $ ( 145 ) $ ( 81 ) $ ( 243 ) (1) Includes derivative activity amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in the Companies’ Consolidated Statements of Income. (2) Excludes amounts related to foreign currency exchange rate derivatives that are deferred to plant under construction within property, plant and equipment and regulatory assets/liabilities that will begin to amortize once the CVOW Commercial Project is placed in service.

Investments

Investments	9 Months Ended
Investments	Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Investments	Note 10. Investments Equity and Debt Securities Rabbi Trust Securities Equity and fixed income securities and cash equivalents in Dominion Energy’s rabbi trusts and classified as trading totaled $ 152 million and $ 119 million at September 30, 2024 and December 31, 2023, respectively. Decommissioning Trust Securities The Companies hold equity and fixed income securities and cash equivalents, and Dominion Energy also holds insurance contracts, in nuclear decommissioning trust funds to fund future decommissioning costs for its nuclear plants. The Companies’ decommissioning trust funds are summarized below: Dominion Energy Virginia Power Amortized Total Total Allowance for Credit Losses Fair Amortized Total Total Allowance for Credit Losses Fair (millions) September 30, 2024 Equity securities: (1) U.S. $ 1,267 $ 4,181 $ ( 2 ) $ 5,446 $ 728 $ 2,168 $ ( 2 ) $ 2,894 Fixed income securities: (2) Corporate debt 569 17 ( 17 ) $ — 569 357 8 ( 14 ) $ — 351 Government 1,549 42 ( 15 ) — 1,576 894 25 ( 7 ) — 912 Common/ — — — — — — — — — — Other 131 — — — 131 96 — — — 96 Insurance 252 — — 252 Cash equivalents (3) 43 — — — 43 13 — — — 13 Total $ 3,811 $ 4,240 $ ( 34 ) (4) $ — $ 8,017 $ 2,088 $ 2,201 $ ( 23 ) (4) $ — $ 4,266 December 31, 2023 Equity securities: (1) U.S. $ 1,276 $ 3,270 $ ( 10 ) $ 4,536 $ 759 $ 1,706 $ ( 10 ) $ 2,455 Fixed income securities: (2) Corporate debt 508 10 ( 27 ) $ — 491 292 3 ( 21 ) $ — 274 Government 1,426 28 ( 24 ) — 1,430 811 17 ( 12 ) — 816 Common/ 161 — — — 161 124 — — — 124 Insurance 244 — — 244 Cash equivalents (3) 84 — — — 84 47 — — — 47 Total $ 3,699 $ 3,308 $ ( 61 ) (4) $ — $ 6,946 $ 2,033 $ 1,726 $ ( 43 ) (4) $ — $ 3,716 (1) Unrealized gains and losses on equity securities are included in other income (expense) and the nuclear decommissioning trust regulatory liability. (2) Unrealized gains and losses on fixed income securities are included in AOCI and the nuclear decommissioning trust regulatory liability. Changes in allowance for credit losses are included in other income (expense). (3) Dominion Energy includes pending sales of securities of $ 21 million and $ 49 million at September 30, 2024 and December 31, 2023 , respectively. Virginia Power includes pending sales of securities of $ 11 million and $ 27 million at September 30, 2024, and December 31, 2023 , respectively. (4) Dominion Energy’s fair value of securities in an unrealized loss position was $ 474 million and $ 764 million at September 30, 2024 and December 31, 2023 , respectively. Virginia Power’s fair value of securities in an unrealized loss position was $ 262 million and $ 384 million at September 30, 2024 and December 31, 2023 , respectively. The portion of unrealized gains and losses that relates to equity securities held within Dominion Energy and Virginia Power’s nuclear decommissioning trusts is summarized below: Dominion Energy Virginia Power Quarter-to-Date Year-to-Date Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 2024 2023 2024 2023 (millions) Net gains (losses) recognized during $ 282 $ ( 150 ) $ 919 $ 370 $ 145 $ ( 80 ) $ 473 $ 189 Less: Net (gains) losses recognized 5 1 1 4 3 ( 1 ) ( 2 ) 2 Unrealized gains (losses) recognized (1) $ 287 $ ( 149 ) $ 920 $ 374 $ 148 $ ( 81 ) $ 471 $ 191 (1) Included in other income (expense) and the nuclear decommissioning trust regulatory liability. The fair value of Dominion Energy and Virginia Power’s fixed income securities with readily determinable fair values held in nuclear decommissioning trust funds at September 30, 2024 by contractual maturity is as follows: Dominion Energy Virginia Power (millions) Due in one year or less $ 27 $ 18 Due after one year through five years 572 299 Due after five years through ten years 459 273 Due after ten years 1,218 769 Total $ 2,276 $ 1,359 Presented below is selected information regarding Dominion Energy and Virginia Power’s equity and fixed income securities with readily determinable fair values held in nuclear decommissioning trust funds. Dominion Energy Virginia Power Quarter-to-Date Year-to-Date Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 2024 2023 2024 2023 (millions) Proceeds from sales $ 651 $ 869 $ 2,230 $ 2,007 $ 297 $ 535 $ 1,370 $ 1,254 Realized gains (1) 18 5 77 48 13 4 52 29 Realized losses (1) 21 33 93 110 16 16 61 61 (1) Includes realized gains and losses recorded to the nuclear decommissioning trust regulatory liability. Equity Method Investments Dominion Energy recorded equity earnings on its investments of less than $ 1 million and $ 7 million for the nine months ended September 30, 2024 and 2023 , respectively, in other income (expense) in its Consolidated Statements of Income. In addition, Dominion Energy recorded equity earnings (losses) of $( 11 ) million and $ 235 million for the nine months ended September 30, 2024 and 2023 , respectively, in discontinued operations, including amounts related to its investments in Cove Point and Atlantic Coast Pipeline discussed below. Dominion Energy received distributions of $ 138 million and $ 241 million for the nine months ended September 30, 2024 and 2023 , respectively. Dominion Energy made contributions of $ 6 million and $ 79 million for the nine months ended September 30, 2024 and 2023, respectively. At September 30, 2024 and December 31, 2023 , the net difference between the carrying amount of Dominion Energy’s investments and its share of underlying equity in net assets was $ 7 million and $ 18 million, respectively. At September 30, 2024 , this difference is primarily comprised of $ 7 million of capitalized interest. At December 31, 2023 , these differences are primarily comprised of $ 9 million of equity method goodwill that is not being amortized and $ 3 million attributable to capitalized interest. Cove Point See Note 9 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023 for a discussion of the sale of Dominion Energy’s remaining interest in Cove Point to BHE, which closed in September 2023. Dominion Energy recorded distributions from Cove Point of $ 49 million and $ 227 million for the three and nine months ended September 30, 2023, respectively. Amounts presented within discontinued operations within Dominion Energy’s Consolidated Statements of Income related to Cove Point for the three and nine months ended September 30, 2023 were $ 52 million and $ 218 million of earnings on equity method investees, $ 69 million and $ 120 million of interest expense and $ 7 million and $ 31 million of income tax expense, respectively. Atlantic Coast Pipeline A description of Dominion Energy’s investment in Atlantic Coast Pipeline, including events that led to the cancellation of the Atlantic Coast Pipeline Project in July 2020, is included in Note 9 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. Dominion Energy recorded equity losses related to Atlantic Coast Pipeline of less than $ 1 million and $ 1 million for the three months ended September 30, 2024 and 2023, respectively, in discontinued operations. Dominion Energy recorded equity losses related to Atlantic Coast Pipeline of $ 12 million and equity earnings of $ 16 million for the nine months ended September 30, 2024 and 2023, respectively, in discontinued operations. At September 30, 2024 and December 31, 2023 , Dominion Energy has recorded a liability of $ 10 million and $ 4 million, respectively, in other current liabilities in its Consolidated Balance Sheets as a result of its share of equity losses exceeding its investment which reflects Dominion Energy’s obligations on behalf of Atlantic Coast Pipeline related to its AROs. Dominion Energy recorded $ 70 million of contributions to Atlantic Coast Pipeline during the nine months ended September 30, 2023. Dominion Energy expects it could incur additional losses from Atlantic Coast Pipeline as it completes wind-down activities. While Dominion Energy is unable to precisely estimate the amounts to be incurred by Atlantic Coast Pipeline, the portion of such amounts attributable to Dominion Energy is not expected to be material to Dominion Energy’s results of operations, financial position or statement of cash flows. Dominion Privatization In February 2024, Dominion Energy received a distribution of $ 126 million from Dominion Privatization, which was accounted for as a return of an investment.

Property, Plant and Equipment

Property, Plant and Equipment	9 Months Ended
Property, Plant and Equipment	Sep. 30, 2024
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Note 11. Property, Plant and Equipment Sale of Noncontrolling Interest in CVOW Commercial Project In February 2024, Virginia Power entered into an agreement to sell a 50 % noncontrolling interest in the CVOW Commercial Project to Stonepeak through the formation of OSWP. In October 2024, Virginia Power and Stonepeak closed on the agreement following the receipt of consent by BOEM and satisfaction of other customary closing and regulatory conditions. Consistent with the terms of the agreement, Virginia Power contributed the CVOW Commercial Project and Stonepeak contributed cash to OSWP. The contribution of the CVOW Commercial Project required approvals from the Virginia and North Carolina Commissions, which were received in September 2024. At closing, Virginia Power received $ 2.6 billion, subject to customary post-closing adjustments, representing 50 % of the CVOW Commercial Project construction costs incurred through closing, less an initial withholding of $ 145 million. If the total project costs of the CVOW Commercial Project are $ 9.8 billion, excluding financing costs, or less Virginia Power shall receive $ 100 million of the initial withholding. Such amount is subject to downward adjustment with Virginia Power receiving no withheld amounts if the total costs, excluding financing costs, of the CVOW Commercial Project exceed $ 11.3 billion. Virginia Power and Stonepeak will each contribute 50 % of the remaining capital necessary to fund construction of the CVOW Commercial Project provided the total project cost, excluding financing costs, is less than $ 11.3 billion. For capital funding necessary, if any, for total project costs, excluding financing costs, of $ 11.3 billion through $ 13.7 billion, Stonepeak will have the option to make additional capital contributions. If Stonepeak elects to make additional capital contributions for project costs, excluding financing costs, in excess of $ 11.3 billion, if any, Virginia Power shall contribute between 67 % and 83 % of such capital with Stonepeak contributing the remainder. To the extent that Stonepeak elects not to make such contributions, Virginia Power shall receive an increase in its ownership percentage of OSWP for any contributed capital based on a tiered unit price for membership interests in OSWP as set forth in the agreement. Virginia Power and Stonepeak have the right to provide capital contributions for any total project costs, excluding financing costs, in excess of $ 13.7 billion. OSWP is considered to be a VIE primarily because its equity capitalization is insufficient to support its operations. Virginia Power is considered to be the primary beneficiary and expects to consolidate OSWP with Stonepeak’s interests reflected as noncontrolling interests beginning in the fourth quarter of 2024 as Virginia Power has the power to direct the most significant activities of OSWP, including construction and operation of the CVOW Commercial Project. In the event that OSWP ceases to be a VIE, Virginia Power expects to continue to consolidate OSWP as its ownership interest is expected to be considered a controlling financial interest over the entity through its rights to control operations. Acquisitions of Nonregulated Solar Projects Other than the item discussed below, there have been no significant updates to acquisitions of solar projects by the Companies from those discussed in Note 10 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. In March 2023 , Dominion Energy entered into an agreement to acquire the Foxhound solar development project in Virginia (reflected in Contracted Energy) which closed in February 2024 , and commenced commercial operations in April 2024 . Dominion Energy will claim production tax credits on the energy generated and sold by the project. Acquisition of Offshore Wind Project In July 2024 , Virginia Power entered into an agreement to acquire an approximately 40,000 -acre area lease 27 miles off the coast of North Carolina in federal waters and associated project assets in the early stages of development for approximately $ 160 million. The transaction closed in October 2024 following the receipt of approval from BOEM and other customary regulatory approvals. The CVOW South project, if constructed, is expected to have a generating capacity of 800 MW with ultimate development of the project dependent upon the receipt of approvals from the Virginia Commission and other permitting entities. The project would support Virginia Power’s ability to meet the renewable energy portfolio standards established in the VCEA. Sales of Corporate Office Buildings In the second quarter of 2024, Dominion Energy recorded a charge of $ 17 million ($ 12 million after-tax) in impairment of assets and other charges in its Consolidated Statements of Income to adjust a corporate office building down to its estimated fair value, using a market approach, of $ 23 million. The valuation is considered a Level 3 fair value measurement as it is based on unobservable inputs due to limited comparable market activity. In the third quarter of 2024, Dominion Energy entered into a new agreement to sell the corporate office building for approximately $ 23 million, which is expected to close by the end of 2024. The corporate office building continues to be reflected in the Corporate and Other segment and presented as held for sale in Dominion Energy’s Consolidated Balance Sheets at both September 30, 2024 and December 31, 2023. In the first quarter of 2023, Dominion Energy recorded a charge of $ 91 million ($ 68 million after-tax) in impairment of assets and other charges in its Consolidated Statements of Income to adjust a corporate office building down to its estimated fair value, using a market approach, of $ 35 million. The valuation is considered a Level 3 fair value measurement as it is based on unobservable inputs due to limited comparable market activity. The corporate office building is reflected in the Corporate and Other segment and presented as held for sale in Dominion Energy’s Consolidated Balance Sheets at December 31, 2023. Dominion Energy completed the sale in July 2024. Nonregulated Renewable Natural Gas Facilities Dominion Energy recorded impairment charges of $ 33 million ($ 25 million after-tax) and $ 27 million ($ 21 million after-tax) in the second and third quarters of 2024, respectively, in impairment of assets and other charges in the Consolidated Statements of Income to write down the long-lived assets of certain nonregulated renewable natural gas facilities under development to their estimated fair values which were each less than $ 1 million. The fair values were estimated using an income approach. The valuations are considered Level 3 fair value measurements due to the use of significant judgmental and unobservable inputs, including projected timing and amount of future cash flows and discount rates reflecting risks inherent in future cash flows and market prices.

Regulatory Assets and Liabiliti

Regulatory Assets and Liabilities	9 Months Ended
Regulatory Assets and Liabilities	Sep. 30, 2024
Regulated Operations [Abstract]
Regulatory Assets and Liabilities	Note 12. Regulatory Assets and Liabilities Regulatory assets and liabilities include the following: Dominion Energy Virginia Power September 30, December 31, September 30, December 31, (millions) Regulatory assets: Deferred cost of fuel used in electric generation (1) $ 35 $ 245 $ 10 $ 95 Securitized cost of fuel used in electric generation (2) 119 — 119 — Deferred rider costs for Virginia electric utility (3) 328 270 328 270 Ash pond and landfill closure costs (4) 111 200 111 200 Deferred nuclear refueling outage costs (5) 67 63 67 63 NND Project costs (6) 138 138 Derivatives (7) 31 162 29 160 Other 201 231 87 80 Regulatory assets-current 1,030 1,309 751 868 Unrecognized pension and other postretirement benefit costs (8) 486 1,036 — — Deferred rider costs for Virginia electric utility (3) 680 496 680 496 Interest rate hedges (9) 167 168 — — AROs and related funding (10) 392 379 NND Project costs (6) 1,845 1,949 CCR remediation, ash pond and landfill closure costs (4) 2,965 2,410 2,645 2,407 Deferred cost of fuel used in electric generation (1) — 1,221 — 1,221 Securitized cost of fuel used in electric generation (2) 1,081 — 1,081 — Derivatives (7) 80 107 41 66 Other 656 590 114 127 Regulatory assets-noncurrent 8,352 8,356 4,561 4,317 Total regulatory assets $ 9,382 $ 9,665 $ 5,312 $ 5,185 Regulatory liabilities: Deferred cost of fuel used in electric generation (1) 166 — 166 — Provision for future cost of removal and AROs (11) 118 118 118 118 Reserve for refunds and rate credits to electric utility customers (12) 77 83 — — Income taxes refundable through future rates (13) 107 107 70 70 Monetization of guarantee settlement (14) 67 67 Derivatives (7) 77 7 60 — Other 102 140 102 133 Regulatory liabilities-current 714 522 516 321 Income taxes refundable through future rates (13) 2,980 3,076 2,170 2,237 Provision for future cost of removal and AROs (11) 1,842 1,818 1,207 1,185 Nuclear decommissioning trust (15) 2,537 2,098 2,537 2,098 Monetization of guarantee settlement (14) 585 635 Interest rate hedges (9) 240 233 240 233 Reserve for refunds and rate credits to electric utility customers (12) 181 237 — — Overrecovered other postretirement benefit costs (16) 176 155 Derivatives (7) 151 136 5 — Other 303 286 236 225 Regulatory liabilities-noncurrent 8,995 8,674 6,395 5,978 Total regulatory liabilities $ 9,709 $ 9,196 $ 6,911 $ 6,299 (1) Reflects deferred fuel expenses for the Virginia and North Carolina jurisdictions of Virginia Power’s electric generation operations. Additionally, Dominion Energy includes deferred fuel expenses for the South Carolina jurisdiction of its electric generation operations. In February 2024, Virginia Power completed a securitization of $ 1.3 billion of under-recovered fuel costs for its Virginia service territory. (2) Reflects under-recovered fuel costs for Virginia Power’s Virginia service territory securitized through the issuance of bonds by VPFS in February 2024. See Note 15 in this report and Notes 13 and 18 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023 for additional information. (3) Reflects deferrals under Virginia Power’s electric transmission FERC formula rate and the deferral of costs associated with certain current and prospective rider projects. (4) Primarily reflects legislation in Virginia which requires any CCR asset located at certain Virginia Power stations to be closed by removing the CCR to an approved landfill or through beneficial reuse. These deferred costs are expected to be collected over a period between 15 and 18 years commencing December 2021 through Rider CCR. Virginia Power is entitled to collect carrying costs on uncollected expenditures once expenditures have been made. In addition, the balance at September 30, 2024 reflects amounts related to the EPA’s May 2024 final rule concerning CCR as discussed in Note 2. (5) Legislation in Virginia requires Virginia Power to defer operation and maintenance costs incurred in connection with the refueling of any nuclear-powered generating plant. These deferred costs will be amortized over the refueling cycle, not to exceed 18 months. (6) Reflects expenditures by DESC associated with the NND Project, which pursuant to the SCANA Merger Approval Order, will be recovered from DESC electric service customers over a 20 -year period ending in 2039. (7) Represents changes in the fair value of derivatives, excluding separately presented interest rate hedges, that following settlement are expected to be recovered from or refunded to customers. (8) Represents unrecognized pension and other postretirement employee benefit costs expected to be recovered or refunded through future rates generally over the expected remaining service period of plan participants by certain of Dominion Energy’s rate-regulated subsidiaries. Includes regulatory assets of $ 215 million and regulatory liabilities of $ 12 million at December 31, 2023 related to retained pension and other postretirement benefit plan assets and obligations for the East Ohio, Questar Gas and PSNC Transactions reclassified to AOCI upon closing of each transaction. (9) Reflects interest rate hedges recoverable from or refundable to customers. Certain of these instruments are settled and any related payments are being amortized into interest expense over the life of the related debt, which has a weighted-average useful life of approximately 25 years and 24 years for Dominion Energy and Virginia Power, respectively, as of September 30, 2024 . (10) Represents uncollected costs, including deferred depreciation and accretion expense, related to legal obligations associated with the future retirement of generation, transmission and distribution properties. The AROs primarily relate to DESC’s electric generating facilities, including Summer, and are expected to be recovered over the related property lives and periods of decommissioning which may range up to approximately 105 years . (11) Rates charged to customers by Dominion Energy and Virginia Power’s regulated businesses include a provision for the cost of future activities to remove assets that are expected to be incurred at the time of retirement. (12) Reflects amounts previously collected from retail electric customers of DESC for the NND Project to be credited over an estimated 11 -year period effective February 2019, in connection with the SCANA Merger Approval Order. Also reflects amounts to be refunded to jurisdictional retail electric customers in Virginia associated with the settlement of the 2021 Triennial Review. See Note 13 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023 for additional information. (13) Amounts recorded to pass the effect of reduced income taxes from the 2017 Tax Reform Act to customers in future periods, which will primarily reverse at the weighted average tax rate that was used to build the reserves over the remaining book life of the property, net of amounts to be recovered through future rates to pay income taxes that become payable when rate revenue is provided to recover AFUDC equity. (14) Reflects amounts to be refunded to DESC electric service customers over a 20 -year period ending in 2039 associated with the monetization of a bankruptcy settlement agreement. (15) Primarily reflects a regulatory liability representing amounts collected from Virginia jurisdictional customers and placed in external trusts (including income, losses and changes in fair value thereon, as applicable) for the future decommissioning of Virginia Power’s utility nuclear generation stations, in excess of the related AROs. (16) Reflects a regulatory liability for the collection of postretirement benefit costs allowed in rates in excess of expense incurred. At September 30, 2024 , Dominion Energy and Virginia Power regulatory assets include $ 6.1 billion and $ 4.5 billion, respectively, on which they do not expect to earn a return during the applicable recovery period. With the exception of certain items discussed above, the majority of these expenditures are expected to be recovered within the next two years .

Regulatory Matters

Regulatory Matters	9 Months Ended
Regulatory Matters	Sep. 30, 2024
Regulated Operations [Abstract]
Regulatory Matters	Note 13. Regulatory Matters Regulatory Matters Involving Potential Loss Contingencies As a result of issues generated in the ordinary course of business, the Companies are involved in various regulatory matters. Certain regulatory matters may ultimately result in a loss; however, as such matters are in an initial procedural phase, involve uncertainty as to the outcome of pending reviews or orders, and/or involve significant factual issues that need to be resolved, it is not possible for the Companies to estimate a range of possible loss. For regulatory matters that the Companies cannot estimate, a statement to this effect is made in the description of the matter. Other matters may have progressed sufficiently through the regulatory process such that the Companies are able to estimate a range of possible loss. For regulatory matters that the Companies are able to reasonably estimate a range of possible losses, an estimated range of possible loss is provided, in excess of the accrued liability (if any) for such matters. Any estimated range is based on currently available information, involves elements of judgment and significant uncertainties and may not represent the Companies’ maximum possible loss exposure. The circumstances of such regulatory matters will change from time to time and actual results may vary significantly from the current estimate. For current matters not specifically reported below, management does not anticipate that the outcome from such matters would have a material effect on the Companies’ financial position, liquidity or results of operations. Other Regulatory Matters Other than the following matters, there have been no significant developments regarding the pending regulatory matters disclosed in Note 13 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. Virginia Regulation - Recent Developments 2023 Biennial Review In July 2023, Virginia Power filed its base rate case and accompanying schedules in support of the 2023 Biennial Review in accordance with legislation enacted in Virginia in April 2023. Virginia Power’s earnings test analysis, as filed, demonstrated it earned a combined ROE of 9.04 % on its generation and distribution services for the test period, within 70 basis points of its authorized ROE of 9.35 % established in the 2021 Triennial Review. Virginia Power did not request an increase in base rates for generation and distribution services and proposed that base rates remain at their existing level utilizing an ROE of 9.70 % for the prospective test periods and a common equity capitalization to total capitalization ratio of 52.10 %. Virginia Power noted that while its prospective test periods would result in a revenue deficiency, it did not request an increase to base rates given that the combination of certain riders with an aggregate annual revenue requirement of at least $ 350 million into base rates effective July 2023 cannot serve as the basis for an increase in base rates as part of the 2023 Biennial Review. In November 2023, Virginia Power, the Virginia Commission staff and other parties filed a comprehensive settlement agreement with the Virginia Commission for approval. The comprehensive settlement agreement indicates that Virginia Power demonstrated it earned a combined ROE of 9.05 % on its generation and distribution services for the test period, requires previously unrecovered severe weather event costs of $ 45 million to be recovered through base rates during the 2023-2024 biennial period, with carrying costs, and provides for $ 15 million in one-time credits to customers by September 2024. In February 2024, the Virginia Commission approved the comprehensive settlement agreement and issued its order in this matter. In doing so, the Virginia Commission determined that Virginia Power’s earnings for the test period, considered as a whole, were within 70 basis points above or below its authorized ROE of 9.35 %. The Virginia Commission also authorized an ROE of 9.70 %, as directed by legislation enacted in Virginia in April 2023, for Virginia Power that will be applied to Virginia Power’s riders prospectively and that will also be utilized to measure base rate earnings for the 2025 Biennial Review. In connection with the order, Virginia Power recorded a net benefit of $ 17 million ($ 12 million after-tax) in the first quarter of 2024 within impairment of assets and other charges in its Consolidated Statements of Income for a regulatory asset for previously unrecovered severe weather event costs, which will be amortized by the end of 2024. Virginia Fuel Expenses In May 2023, Virginia Power filed its annual fuel factor filing with the Virginia Commission to recover an estimated $ 2.3 billion in Virginia jurisdictional projected fuel expense for the rate year beginning July 1, 2023 and a projected $ 1.3 billion under-recovered balance as of June 30, 2023. As discussed in Note 13 to the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023, Virginia Power proposed two alternatives to recover these under-collected fuel costs, including an option based on an anticipated securitization of up to $ 1.3 billion under-recovered balance as of June 30, 2023 as permitted under legislation enacted in Virginia in April 2023, with such securitization approved by the Virginia Commission in November 2023 and completed by Virginia Power in February 2024. In March 2024, the Virginia Commission approved Virginia Power’s annual fuel factor based on the securitization option, which results in a net decrease in Virginia Power’s fuel revenues for the rate year of approximately $ 541 million. In addition, the Virginia Commission approved Virginia Power’s proposal to alter the order in which revenue from certain customers who elect to pay market-based rates would be allocated between base rates and fuel, which results in a reduction to fuel revenue of $ 13 million. In May 2024, Virginia Power filed its annual fuel factor with the Virginia Commission to recover an estimated $ 2.2 billion in Virginia jurisdictional projected fuel expenses for the rate year beginning July 1, 2024 and to return an estimated $ 266 million net over-recovered balance through June 30, 2024. Virginia Power’s proposed fuel rate represents a fuel revenue decrease of $ 636 million when applied to projected kilowatt-hour sales for the rate year beginning July 1, 2024. In May 2024, the Virginia Commission ordered that Virginia Power’s proposed total fuel factor rate be placed into effect on an interim basis for usage on and after July 1, 2024. This matter is pending. PJM Capacity Expense Deferral In October 2024, Virginia Power filed a request with the Virginia Commission for approval to defer up to $ 145 million of capacity expenses expected to be incurred with PJM for 2025 for jurisdictional customers and have such expenses considered as part of the 2027 Biennial Review. This matter is pending. Renewable Generation Projects In October 2023, Virginia Power filed a petition with the Virginia Commission for CPCNs to construct or acquire and operate four utility-scale projects totaling approximately 329 MW of solar generation as part of its efforts to meet the renewable generation development targets under the VCEA. The projects, as of October 2023, are expected to cost approximately $ 850 million in the aggregate, excluding financing costs, and be placed into service between 2024 and 2026. In March 2024, the Virginia Commission approved the petition. In October 2024, Virginia Power filed a petition with the Virginia Commission for CPCNs to construct or acquire and operate two utility-scale projects totaling approximately 208 MW of solar generation as part of its efforts to meet the renewable generation development targets under the VCEA. The projects, as of October 2024, are expected to cost approximately $ 605 million in the aggregate, excluding financing costs, and be placed into service between 2026 and 2028. This matter is pending. Virginia LNG Storage Facility In June 2024, Virginia Power filed a petition with the Virginia Commission to amend the CPCNs for Brunswick County and Greensville County to construct and operate an LNG production, storage and regasification facility and related transmission facilities adjacent to Greensville County. When complete, the facility will store the liquefied equivalent of approximately 2.0 bcf and would be able to regasify approximately 25 % of its storage capacity per day and liquefy from the pipeline less than 1 % of its equivalent storage capacity per day. The facility will serve as a backup fuel source for Brunswick County and Greensville County to support operations and improve system reliability. The facility is expected to cost approximately $ 550 million, excluding financing costs, and be placed into service by the end of 2027. This matter is pending. Riders Other than the following matters, there have been no significant developments regarding the significant riders associated with various Virginia Power projects disclosed in Note 13 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. Rider Name Application Date Approval Date Rate Year Total Revenue (1) Increase (Decrease) Rider CCR March 2024 Pending December 2024 $ 103 $ ( 91 ) Rider CE (2) October 2023 March 2024 May 2024 133 44 Rider CE (3) October 2024 Pending May 2025 182 49 Rider DIST (4) August 2024 Pending June 2025 269 N/A Rider E January 2024 September 2024 November 2024 72 ( 37 ) Rider GEN (5) June 2024 Pending April 2025 438 N/A Rider GEN June 2024 Pending April 2026 311 ( 127 ) Rider GT August 2023 May 2024 June 2024 145 131 Rider OSW November 2023 July 2024 September 2024 486 215 Rider OSW (6) November 2024 Pending September 2025 640 154 Rider RPS December 2023 (11) August 2024 September 2024 358 262 Rider SNA October 2023 July 2024 September 2024 69 19 Rider SNA (7) October 2024 Pending September 2025 207 138 Rider T1 (8) May 2024 July 2024 September 2024 1,170 291 Rider U (9) October 2023 July 2024 August 2024 150 76 DSM Riders (10) December 2023 July 2024 September 2024 86 ( 21 ) (1) In addition, Virginia Power has a rider associated with another project with a total annual revenue requirement of $ 18 million as of September 30, 2024. There is a pending application associated with this rider, which if approved, would result in a net annual revenue requirement increase of $ 7 million. (2) The Virginia Commission approved four solar generation projects and 13 power purchase agreements in addition to previously approved Rider CE projects. In addition, the approved total revenue requirement includes amounts which had previously been collected under a separate rider. (3) Associated with two solar generation projects, two small-scale solar projects and 24 purchased power agreements in addition to previously approved Rider CE projects. (4) Consists of $ 103 million in total revenue requirement for certain previously approved electric distribution grid transformation projects and $ 166 million for previously approved phases and proposed phase eight of certain new underground distribution facilities. If approved, would result in the consolidation of Riders GT and U and cease the separate collection of rates under these riders effective June 1, 2025. (5) Includes $ 348 million in total revenue requirement related to the consolidation of Riders BW, GV and four other riders associated with generation facilities, ceasing the separate collection of rates under these riders effective April 1, 2025 and the extension of existing rates for Rider BW through March 2025. In addition, Virginia Power also requests approval to recover costs associated with the Virginia LNG Storage Facility described above. (6) Includes a proposal for Virginia Power to establish a decommissioning trust fund associated with the CVOW Commercial Project. If approved, the applicable amount included within the total revenue requirement would be allocated for such purposes. (7) Virginia Power also requested approval of cost recovery of approximately $ 1.7 billion through Rider SNA for the second phase of nuclear life extension program which includes investments for calendar years 2025 through 2027. (8) Consists of $ 532 million for the transmission component of Virginia Power’s base rates and $ 638 million for Rider T1. (9) Consists of $ 72 million for previously approved phases and $ 78 million for phase seven costs for Rider U. In addition, the Virginia Commission approved Virginia Power’s request to extend existing rates for Rider U through July 2024. (10) Associated with an additional three new energy efficiency programs and one new demand response program with a $ 102 million cost cap, with the ability to exceed the cost cap by no more than 15 %. (11) Virginia Power amended its application in February 2024. In June 2024, the Virginia Commission approved Virginia Power’s request, filed in May 2024, to cease Rider RGGI effective July 2024. Electric Transmission Projects Other than the following matters, there have been no significant developments regarding the significant Virginia Power electric transmission projects disclosed in Note 13 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. Description and Location Application Date Approval Date Type of Miles of Cost Estimate (1) Construct new Germanna substation, transmission November 2023 August 2024 230 kV 2 $ 55 Construct Daves Store transmission line extension February 2024 October 2024 230 kV 3 70 Construct new Aspen and Golden substations, March 2024 Pending 500- 10 690 Partial rebuild Fredericksburg-Aquia Harbour March 2024 Pending 230- 24 135 Construct new Apollo-Twin Creeks transmission March 2024 Pending 230 kV 2 285 Rebuild Dooms-Harrisonburg transmission lines April 2024 Pending 230 kV 22 60 Rebuild and construct new Fentress-Yadkin June 2024 Pending 500 kV 14 205 Partial rebuild, reconductor and construct new July 2024 Pending 230 kV 6 170 Rebuild Aquia Harbour-Possum Point transmission August 2024 Pending 500- 32 210 Partial rebuild, reconductor and construct new August 2024 Pending 230 kV 38 120 Construct new Centreport transmission line, September 2024 Pending 230 kV 3 55 Partial rebuild and construct new Meadowville October 2024 Pending 230 kV 11 190 (1) Represents the cost estimate included in the application except as updated in the approval if applicable. In addition, Virginia Power had various other transmission projects approved or applied for and currently pending approval with aggregate cost estimates of approximately $ 145 million and $ 55 million, respectively. North Carolina Regulation Virginia Power Base Rate Case In March 2024, Virginia Power filed its base rate case and schedules with the North Carolina Commission. Virginia Power proposed a non-fuel, base rate increase of $ 57 million effective November 1, 2024 on an interim basis subject to refund, with any permanent rates ordered by the North Carolina Commission effective February 1, 2025. The base rate increase was proposed to recover the significant investments in generation, transmission and distribution infrastructure for the benefit of North Carolina customers. Virginia Power presented an earned return of 5.01 % based upon a fully-adjusted test period, compared to its authorized 9.75 % return, and proposed a 10.60 % ROE. In October 2024, Virginia Power, the North Carolina public staff and other parties of record filed a settlement agreement with the North Carolina Commission for approval. The settlement agreement provides for a non-fuel, base rate increase of $ 37 million effective November 1, 2024 on an interim basis subject to refund, with any permanent rates ordered by the North Carolina Commission effective February 1, 2025, and an authorized ROE of 9.95 %. In addition, the settlement agreement provides that Virginia Power may file with the North Carolina Commission an application for an annual rider to seek recovery of incurred North Carolina jurisdictional CCR expenses, with the first such rider, if approved by the North Carolina Commission, taking effect February 1, 2025 and covering costs for the period July 1, 2024 through December 31, 2024. This matter is pending. Virginia Power Fuel Filing In August 2024, Virginia Power submitted its annual filing to the North Carolina Commission to adjust the fuel component of its electric rates. As subsequently updated in October 2024, Virginia Power proposed a total $ 107 million decrease to the fuel component of its electric rates for the rate year beginning February 1, 2025. In addition, Virginia Power proposed the implementation of a three-month decrement rider effective November 1, 2024 to reduce the over-recovery of the fuel component of its electric rates during the current rate year. These matters are pending. PSNC Customer Usage Tracker PSNC utilizes a customer usage tracker, a decoupling mechanism, which allows it to adjust its base rates semi-annually for residential and commercial customers based on average per customer consumption. In March 2024 , PSNC submitted a filing with the North Carolina Commission for a $ 31 million decrease relating to the customer usage tracker. The North Carolina Commission approved the filing in March 2024 with rates effective April 2024. South Carolina Regulation Electric Base Rate Case In March 2024, DESC filed its retail electric base rate case and schedules with the South Carolina Commission. DESC proposed a non-fuel, base rate increase of $ 295 million, partially offset by a net decrease in storm damage and DSM components of $ 4 million. If approved, the overall proposed rate increase of $ 291 million, or 12.59 %, would be effective on and after the first billing cycle of September 2024. The base rate increase was proposed to recover the significant investment in assets and operating resources required to serve an expanding customer base, maintain the safety, reliability and efficiency of DESC’s system and meet increasingly stringent reliability, security and environmental requirements for the benefit of South Carolina customers. DESC presented an earned ROE of 4.32 % based upon a fully-adjusted test period. The proposed rates would provide for an earned ROE of 10.60 % compared to the currently authorized ROE of 9.50 %. In July 2024, DESC, the South Carolina Office of Regulatory Staff and other parties of record filed a comprehensive settlement agreement with the South Carolina Commission for approval. The comprehensive settlement agreement provides for a non-fuel, base rate increase of $ 219 million prior to the effect of South Carolina Commission-ordered DSM reductions commencing with service rendered on September 1, 2024 and an authorized ROE of 9.94 %. In addition, the comprehensive settlement agreement includes that DESC would provide a one-time bill credit in 2024 of approximately $ 7 million primarily to residential customers. In August 2024, the South Carolina Commission voted to approve the settlement agreement. In connection with this matter, in the third quarter of 2024 Dominion Energy recorded a charge of $ 58 million ($ 44 million after tax) (reflected within the Corporate and Other segment), including $ 50 million to write down certain materials and supplies inventory presented within impairment of assets and other charges. Cost of Fuel DESC’s retail electric rates include a cost of fuel component approved by the South Carolina Commission which may be adjusted periodically to reflect changes in the price of fuel purchased by DESC. In February 2024 , DESC filed with the South Carolina Commission a proposal to decrease the total fuel cost component of retail electric rates. DESC’s proposed adjustment is designed to recover DESC’s current base fuel costs, including its existing under-collected balance, over the 12-month period beginning with the first billing cycle of May 2024 . In addition, DESC proposed an increase to its variable environmental and avoided capacity cost component. The net effect is a proposed annual decrease of $ 315 million. In March 2024, DESC, the South Carolina Office of Regulatory Staff and another party of record filed a settlement agreement with the South Carolina Commission for approval to make certain adjustments to the February 2024 filing that would result in a net annual decrease of $ 316 million. In April 2024, the South Carolina Commission voted to approve the settlement agreement, with rates effective May 2024. DSM Programs DESC has approval for a DSM rider through which it recovers expenditures related to its DSM programs. In January 2024, DESC filed an application with the South Carolina Commission seeking approval to recover $ 47 million of costs and net lost revenues associated with these programs, along with an incentive to invest in such programs. DESC requested that rates be effective with the first billing cycle of May 2024. In April 2024, the South Carolina Commission approved the request, effective with the first billing cycle of May 2024. Electric - Transmission Project In March 2024 , DESC filed an application with the South Carolina Commission requesting approval of a CPCN to construct and operate the Church Creek - Charleston Transmission Line, comprised of a 7 -mile 230 kV transmission line and associated facilities in Charleston County, South Carolina with an estimated total project cost of $ 40 million. In July 2024, the South Carolina Commission approved the application.

Leases

Leases	9 Months Ended
Leases	Sep. 30, 2024
Leases [Abstract]
Leases	Note 14. Leases Other than the items discussed below, there have been no significant changes regarding the Companies’ leases as described in Note 15 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. Dominion Energy’s Consolidated Statements of Income include $ 6 million and $ 15 million for the three and nine months ended September 30, 2024 , respectively, and $ 7 million and $ 18 million for the three and nine months ended September 30, 2023 , respectively, of rental revenue included in operating revenue . Dominion Energy’s Consolidated Statements of Income include $ 3 million and $ 6 million for the three and nine months ended September 30, 2024 , respectively, and less than $ 1 million and $ 4 million for the three and nine months ended September 30, 2023, respectively, of depreciation expense included in depreciation and amortization related to facilities subject to power purchase agreements under which Dominion Energy is the lessor. In April 2024, Dominion Energy agreed to pay $ 47 million in connection with a settlement of an agreement related to the offshore wind installation vessel under development and recorded a charge of $ 47 million ($ 35 million after-tax) in the first quarter of 2024 within impairments and other charges in its Consolidated Statements of Income. Offshore Wind Vessel Leasing Arrangement In December 2020, Dominion Energy signed an agreement (most recently amended in August 2024) with a lessor to complete construction of and lease a Jones Act compliant offshore wind installation vessel. This vessel is designed to handle current turbine technologies as well as next generation turbines. The lessor is providing equity and has obtained financing commitments from debt investors, totaling $ 715 million, to fund the estimated project costs. The project is expected to be completed in early 2025. Dominion Energy has been appointed to act as the construction agent for the lessor, during which time Dominion Energy will request cash draws from the lessor and debt investors to fund all project costs, which totaled $ 544 million as of September 30, 2024. If the project is terminated under certain events of default, Dominion Energy could be required to pay up to 100 % of the then funded amount. The initial lease term will commence once construction is substantially complete and the vessel is delivered and will mature after five years. At the end of the initial lease term, Dominion Energy can (i) extend the term of the lease for an additional term, subject to the approval of the participants, at current market terms, (ii) purchase the property for an amount equal to the outstanding project costs or, (iii) subject to certain terms and conditions, sell the property on behalf of the lessor to a third party using commercially reasonable efforts to obtain the highest cash purchase price for the property. If the project is sold and the proceeds from the sale are insufficient to repay the investors for the outstanding project costs, Dominion Energy may be required to make a payment to the lessor for the difference between the outstanding project costs and sale proceeds. Dominion Energy is not considered the owner during construction for financial accounting purposes and, therefore, will not reflect the construction activity in its consolidated financial statements. Dominion Energy expects to recognize a right-of-use asset and a corresponding finance lease liability at the commencement of the lease term. Dominion Energy will be considered the owner of the leased property for tax purposes, and as a result, will be entitled to tax deductions for depreciation and interest expense.

Variable Interest Entities

Variable Interest Entities	9 Months Ended
Variable Interest Entities	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable Interest Entities	Note 15. Variable Interest Entities There have been no significant changes regarding the entities the Companies consider VIEs as described in Note 16 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. Virginia Power Virginia Power purchased shared services from DES, an affiliated VIE, of $ 125 million and $ 113 million for the three months ended September 30, 2024 and 2023 , respectively, and $ 368 million and $ 339 million for the nine months ended September 30, 2024 and 2023 , respectively. Virginia Power’s Consolidated Balance Sheets include amounts due to DES of $ 33 million and $ 32 million at September 30, 2024 and December 31, 2023, respectively, recorded in payables to affiliates. As described in Note 18 of the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023, Virginia Power formed VPFS in October 2023, a wholly-owned special purpose subsidiary which is considered to be a VIE, for the sole purpose of securitizing certain of Virginia Power’s under-recovered deferred fuel balance through the issuance of senior secured deferred fuel cost bonds. The Companies’ Consolidated Balance Sheets at September 30, 2024 included balances for VPFS in regulatory assets-current ($ 119 million), other current assets ($ 100 million), regulatory assets-noncurrent ($ 1.1 billion), securities due within one year ($ 146 million), accrued interest, payroll and taxes ($ 40 million) and securitization bonds ($ 1.1 billion). See Note 11 for discussion of OSWP, which is considered to be a VIE.

Significant Financing Transacti

Significant Financing Transactions	9 Months Ended
Significant Financing Transactions	Sep. 30, 2024
Debt Disclosure [Abstract]
Significant Financing Transactions	Note 16. Significant Financing Transactions Credit Facilities and Short-term Debt The Companies use short-term debt to fund working capital requirements and as a bridge to long-term debt financings. The levels of borrowing may vary significantly during the course of the year, depending upon the timing and amount of cash requirements not satisfied by cash from operations. In addition, Dominion Energy utilizes cash and letters of credit to fund collateral requirements. Collateral requirements are impacted by commodity prices, hedging levels, Dominion Energy’s credit ratings and the credit quality of its counterparties. Other than the items discussed below, there have been no significant changes regarding the Companies’ credit facilities and short-term debt as described in Note 17 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. Dominion Energy Dominion Energy’s short-term financing is supported by its $ 6.0 billion joint revolving credit facility that provides for a discount in the pricing of certain annual fees and amounts borrowed by Dominion Energy under the facility if Dominion Energy achieves certain annual renewable electric generation and diversity and inclusion objectives. At September 30, 2024, Dominion Energy’s commercial paper and letters of credit outstanding, as well as its capacity available under the credit facility, were as follows: Facility Outstanding Outstanding Facility (millions) Joint revolving credit facility (1)(2) $ 6,000 $ 3,622 $ 21 $ 2,357 (1) This credit facility matures in June 2026, with the potential to be extended by the borrowers to June 2028, and can be used by the borrowers under the credit facility to support bank borrowings and the issuance of commercial paper, as well as to support up to a combined $ 2.0 billion of letters of credit . (2) In May 2024, the joint revolving credit facility was amended to remove Questar Gas as a co-borrower . DESC’s short-term financing is supported through its access as co-borrower to the joint revolving credit facility discussed above with the Companies. At September 30, 2024 , the sub-limit for DESC was $ 500 million. In addition to the credit facility mentioned above and Virginia Power’s letter of credit facilities mentioned below, Dominion Energy also had a credit facility which allowed Dominion Energy to issue up to approximately $ 30 million in letters of credit, which matured in June 2024 . At December 31, 2023 , Dominion Energy had $ 25 million in letters of credit outstanding under this facility. In March 2023, Dominion Energy entered into an agreement with a financial institution which it expects to allow it to issue up to $ 100 million in letters of credit. At September 30, 2024 and December 31, 2023 , $ 48 million and $ 54 million, respectively, in letters of credit were issued and outstanding under this agreement. In June 2024, the Companies entered into an agreement with a financial institution which the Companies expect to allow the Companies to issue up to a combined $ 125 million in letters of credit. At September 30, 2024 , Dominion Energy had no letters of credit issued and outstanding under this agreement. Dominion Energy has an effective shelf registration statement with the SEC for the sale of up to $ 3.0 billion of variable denomination floating rate demand notes, called Dominion Energy Reliability Investment SM as disclosed in Note 17 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. At September 30, 2024 and December 31, 2023 , Dominion Energy’s Consolidated Balance Sheets include $ 482 million and $ 409 million, respectively, with respect to such notes presented within short-term debt. The proceeds are used for general corporate purposes and to repay debt. In March 2024, Dominion Energy repaid the full $ 2.5 billion outstanding under its $ 2.5 billion 364-day term loan facility entered into in January 2023 as amended in January 2024, using after-tax proceeds received in connection with the East Ohio Transaction. The debt was scheduled to mature in July 2024. At December 31, 2023 , Dominion Energy’s Consolidated Balance Sheet included $ 2.5 billion with respect to such facility presented within securities due within one year. In March 2024, Dominion Energy repaid $ 1.8 billion of its $ 2.25 billion 364-day term loan facility entered into in October 2023, using after-tax proceeds received in connection with the East Ohio Transaction. Subsequently in March 2024, Dominion Energy requested and received a $ 500 million increase to the amount of the facility and concurrently borrowed $ 500 million with the proceeds used for general corporate purposes. In May 2024, Dominion Energy repaid the full $ 976 million outstanding under the facility, using after-tax proceeds received in connection with the Questar Gas Transaction. The debt was scheduled to mature in October 2024. At December 31, 2023 , Dominion Energy’s Consolidated Balance Sheet included $ 2.25 billion with respect to such facility presented within securities due within one year. Virginia Power Virginia Power’s short-term financing is supported through its access as co-borrower to Dominion Energy’s $ 6.0 billion joint revolving credit facility. The credit facility can be used for working capital, as support for the combined commercial paper programs of the borrowers under the credit facility and for other general corporate purposes. At September 30, 2024, Virginia Power’s share of commercial paper and letters of credit outstanding under the joint revolving credit facility with Dominion Energy and DESC was as follows: Facility (1) Outstanding Outstanding (millions) Joint revolving credit facility (1)(2) $ 6,000 $ 740 $ 10 (1) The full amount of the facility is available to Virginia Power, less any amounts outstanding to co-borrowers Dominion Energy and DESC. The sub-limit for Virginia Power is set pursuant to the terms of the facility but can be changed at the option of the borrowers multiple times per year. At September 30, 2024 , the sub-limit for Virginia Power was $ 1.75 billion. If Virginia Power has liquidity needs in excess of its sub-limit, the sub-limit may be changed or such needs may be satisfied through short-term intercompany borrowings from Dominion Energy. This credit facility matures in June 2026, with the potential to be extended by the borrowers to June 2028. The credit facility can be used to support bank borrowings and the issuance of commercial paper, as well as to support up to $ 2.0 billion (or the sub-limit, whichever is less) of letters of credit. (2) In May 2024, the joint revolving credit facility was amended to remove Questar Gas as a co-borrower. In January 2023, Virginia Power entered into a letter of credit facility which allowed Virginia Power to issue up to $ 125 million in letters of credit and was scheduled to mature in January 2026 . At December 31, 2023 , less than $ 1 million in letters of credit were issued and outstanding under this facility with no amounts drawn under the letters of credit. As of March 31, 2024, the credit facility had been terminated. In March 2023, Virginia Power entered into an agreement with a financial institution, which it expects to allow it to issue up to $ 300 million in letters of credit. At September 30, 2024 and December 31, 2023 , $ 123 million and $ 124 million, respectively, in letters of credit were issued and outstanding under this agreement. As noted above, in June 2024, the Companies entered into an agreement with a financial institution which the Companies expect to allow the Companies to issue up to a combined $ 125 million in letters of credit. At September 30, 2024 , Virginia Power had $ 21 million in letters of credit issued and outstanding under this agreement. Long-term Debt Unless otherwise noted, the proceeds of long-term debt issuances were used for general corporate purposes and/or to repay short-term debt. In May 2024, Dominion Energy used a portion of the proceeds from the issuance of the 2024 EJSNs discussed below, to repay the outstanding balance of $ 450 million under the Sustainability Revolving Credit Facility, which is described in Note 18 to the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. In June 2024, the facility was amended to extend the maturity date to June 2025 . At December 31, 2023, Dominion Energy’s Consolidated Balance Sheet included $ 450 million with respect to this facility. In May 2024, Dominion Energy issued $ 2.0 billion of enhanced junior subordinated notes, consisting of $ 1.0 billion of 2024 Series A EJSNs and $ 1.0 billion of 2024 Series B EJSNs that mature in 2055 and 2054 , respectively. The 2024 Series A EJSNs will bear interest at 6.875 % until February 1, 2030. The interest rate will reset every five years beginning on February 1, 2030, to equal the then-current five-year U.S. Treasury rate plus a spread of 2.386 %, provided that the interest rate will not reset below 6.875 %. The 2024 Series B EJSNs will bear interest at 7.0 % until June 1, 2034. The interest rate will reset every five years beginning on June 1, 2034, to equal the then-current five-year U.S. Treasury rate plus a spread of 2.511 %, provided that the interest rate will not reset below 7.0 %. Dominion Energy may defer interest payments on the 2024 EJSNs on one or more occasions for up to 10 consecutive years. If interest payments on the 2024 EJSNs are deferred, Dominion Energy may not, subject to certain limited exceptions, declare or pay any dividends or other distributions on, or redeem, repurchase or otherwise acquire any of its capital stock during the deferral period. Also, during the deferral period, Dominion Energy may not make any payments on or redeem or repurchase any debt securities or make any payments under any guarantee of debt that, in each case, is equal or junior in right of payment to the 2024 EJSNs. Dominion Energy used the proceeds from this issuance for general corporate purposes including the repayment of short-term debt, the repayment of amounts outstanding under the Sustainability Revolving Credit Facility as discussed above and the repurchase of Series B Preferred Stock as discussed below. In May 2024, Virginia Power remarketed three series of tax-exempt bonds, with an aggregate outstanding principal of $ 243 million to new investors. All three bonds will bear interest at a coupon of 3.80 % until May 2027 , after which they will bear interest at a market rate to be determined at that time. In August 2024, Virginia Power issued $ 600 million of 5.05 % senior notes and $ 600 million of 5.55 % senior notes that mature in 2034 and 2054 , respectively. Proceeds were used for general corporate purposes and to repay amounts outstanding under the intercompany credit facility with Dominion Energy. In October 2024, Dominion Energy redeemed all $ 27 million in outstanding principal amount of its 3.80 % Peninsula Ports Authority of Virginia Coal Terminal Revenue Refunding Bonds at par plus accrued interest. These bonds, which would have otherwise matured in 2033 , are reflected in securities due within one year in Dominion Energy’s Consolidated Balance Sheet at September 30, 2024. Dominion Energy expects to record a charge of less than $ 1 million in the fourth quarter of 2024 in connection with this early redemption. In October 2024, Dominion Energy redeemed all $ 685 million in outstanding principal amount of its October 2014 hybrids at par plus accrued interest including interest accrued at a floating rate effective October 2024. The notes, which would have otherwise matured in 2054 , are reflected in securities due within one year in Dominion Energy’s Consolidated Balance Sheet at September 30, 2024. Dominion Energy expects to record a charge of approximately $ 7 million in the fourth quarter of 2024 in connection with this early redemption. Dominion Energy recognized a charge of $ 10 million during the nine months ended September 30, 2024 within interest expense in its Consolidated Statements of Income in connection with the early redemption of Eagle Solar’s secured senior notes in February 2024. Preferred Stock Dominion Energy is authorized to issue up to 20 million shares of preferred stock, which may be designated into separate classes. At December 31, 2023 , Dominion Energy had issued and outstanding 1.8 million shares of preferred stock, 0.8 million and 1.0 million of which were designated as the Series B Preferred Stock and the Series C Preferred Stock, respectively. In June 2024, Dominion Energy completed a tender offer repurchasing 0.4 million of the 0.8 million shares of Series B Preferred Stock issued and outstanding representing $ 440 million in aggregate liquidation preference. At September 30, 2024 , Dominion Energy had issued and outstanding 1.4 million shares of preferred stock, 0.4 million and 1.0 million of which were designated as the Series B Preferred Stock and the Series C Preferred Stock, respectively. Dominion Energy recorded dividends on the Series B Preferred Stock of $ 4 million ($ 11.625 per share) and $ 21 million ($ 33.172 per share) for the three and nine months ended September 30, 2024, respectively. These amounts exclude a deemed dividend of $ 9 million representing deferred issuance costs, legal and bank fees and excise tax associated with the shares of Series B Preferred Stock repurchased in June 2024. Dominion Energy recorded dividends on the Series B Preferred Stock of $ 9 million ($ 11.625 per share) and $ 27 million ($ 34.875 per share) for the three and nine months ended September 30, 2023, respectively. Dominion Energy recorded dividends on the Series C Preferred Stock of $ 11 million ($ 10.875 per share) for both the three months ended September 30, 2024 and 2023 and $ 33 million ($ 32.625 per share) for both the nine months ended September 30, 2024 and 2023. There have been no significant changes to Dominion Energy’s Series C Preferred Stock as described in Note 19 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. Issuance of Common Stock Dominion Energy recorded, net of fees and commissions, $ 91 million from the issuance of 2 million shares of common stock for the nine months ended September 30, 2023 and $ 102 million from the issuance of 2 million shares of common stock for the nine months ended September 30, 2024, through various programs including Dominion Energy Direct® and employee savings plans as described in Note 20 to the Consolidated Financial Statements to the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. In August 2023, Dominion Energy began purchasing its common stock on the open market for these direct stock purchase plans and, in March 2024, began issuing new shares of common stock. At-the-Market Program In May 2024, Dominion Energy entered into sales agency agreements to effect sales under a new at-the-market program. Under the sales agency agreements, Dominion Energy may, from time to time, offer and sell shares of its common stock through the sales agents or enter into one or more forward sale agreements with respect to shares of its common stock. Sales by Dominion Energy through the sales agents or by forward sellers pursuant to a forward sale agreement cannot exceed $ 1.8 billion in the aggregate. Through September 30, 2024, Dominion Energy entered forward sale agreements for approximately 11.4 million shares of its common stock expected to be settled in the fourth quarter of 2024 at a weighted average initial forward price of $ 53.23 per share. Except in certain circumstances, Dominion Energy can elect physical, cash or net settlement of the forward sale agreements. In September 2024, Dominion Energy entered forward sale agreements for approximately 3.8 million shares of its common stock expected to be settled in the fourth quarter of 2025 at a weighted average initial forward price of $ 57.62 per share. Except in certain circumstances, Dominion Energy can elect physical, cash or net settlement of the forward sale agreements. Repurchase of Common Stock In November 2020, the Board of Directors authorized the repurchase of up to $ 1.0 billion of Dominion Energy’s common stock, with $ 0.9 billion available as of September 30, 2024. Dominion Energy did no t repurchase any shares of common stock during the nine months ended September 30, 2024 , except for shares tendered by employees to satisfy tax withholding obligations on vested restricted stock, which do not count against its stock repurchase authorization.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 17. Commitments and Contingencies As a result of issues generated in the ordinary course of business, the Companies are involved in legal proceedings before various courts and are periodically subject to governmental examinations (including by regulatory authorities), inquiries and investigations. Certain legal proceedings and governmental examinations involve demands for unspecified amounts of damages, are in an initial procedural phase, involve uncertainty as to the outcome of pending appeals or motions or involve significant factual issues that need to be resolved, such that it is not possible for the Companies to estimate a range of possible loss. For such matters that the Companies cannot estimate, a statement to this effect is made in the description of the matter. Other matters may have progressed sufficiently through the litigation or investigative processes such that the Companies are able to estimate a range of possible loss. For legal proceedings and governmental examinations that the Companies are able to reasonably estimate a range of possible losses, an estimated range of possible loss is provided, in excess of the accrued liability (if any) for such matters. The Companies maintain various insurance programs, including general liability insurance coverage which provides coverage for personal injury or wrongful death cases. Any accrued liability is recorded on a gross basis with a receivable also recorded for any probable insurance recoveries. Estimated ranges of loss are inclusive of legal fees and net of any anticipated insurance recoveries. Any estimated range is based on currently available information and involves elements of judgment and significant uncertainties. Any estimated range of possible loss may not represent the Companies’ maximum possible loss exposure. The circumstances of such legal proceedings and governmental examinations will change from time to time and actual results may vary significantly from the current estimate. For current proceedings not specifically reported below, management does not anticipate that the liabilities, if any, arising from such proceedings would have a material effect on the Companies’ financial position, liquidity or results of operations. Environmental Matters The Companies are subject to costs resulting from a number of federal, state and local laws and regulations designed to protect human health and the environment. These laws and regulations affect future planning and existing operations. They can result in increased capital, operating and other costs as a result of compliance, remediation, containment and monitoring obligations. Air The CAA, as amended, is a comprehensive program utilizing a broad range of regulatory tools to protect and preserve the nation’s air quality. At a minimum, states are required to establish regulatory programs to meet applicable requirements of the CAA. However, states may choose to develop regulatory programs that are more restrictive. Many of the Companies’ facilities are subject to the CAA’s permitting and other requirements. Ozone Standards The EPA published final non-attainment designations for the October 2015 ozone standards in June 2018 with states required to develop plans to address the new standard. Certain states in which the Companies operate have developed plans, and had such plans approved or partially approved by the EPA, which are not expected to have a material impact on the Companies’ results of operations or cash flows. In March 2023, the EPA issued a final rule specifying an interstate federal implementation plan to comply with certain aspects of planning for the 2015 ozone standards which is applicable in August 2023 for certain states, including Virginia. The interstate federal implementation plan imposes tighter NO X emissions limits during the ozone season and includes provisions for the use of allowances to cover such emissions. Unless and until implementation plans for the 2015 ozone standards are fully developed and approved for all states in which the Companies operate, the Companies are unable to predict whether or to what extent the new rules will ultimately require additional controls. The expenditures required to implement additional controls could have a material impact on the Companies’ results of operations, financial condition and/or cash flows. ACE Rule In July 2019, the EPA published the final rule informally referred to as the ACE Rule, as a replacement for the Clean Power Plan. The ACE Rule regulated GHG emissions from existing coal-fired power plants pursuant to Section 111(d) of the CAA and required states to develop plans by July 2022 establishing unit-specific performance standards for existing coal-fired power plants. In January 2021, the U.S. Court of Appeals for the D.C. Circuit vacated the ACE Rule and remanded it to the EPA. This decision would take effect upon issuance of the court’s mandate. In March 2021, the court issued a partial mandate vacating and remanding all parts of the ACE Rule except for the portion of the ACE Rule that repealed the Clean Power Plan. In October 2021, the U.S. Supreme Court agreed to hear a challenge of the U.S. Court of Appeals for the D.C. Circuit’s decision on the ACE Rule. In June 2022, the U.S. Supreme Court reversed the D.C. Circuit’s decision on the ACE Rule and remanded the case back to the D.C. Circuit. In May 2024, the EPA repealed the ACE Rule as part of a package of final rules addressing CO 2 emissions from new and existing fossil fuel-fired electric generating units. Carbon Regulations In August 2016, the EPA issued a draft rule proposing to reaffirm that a source’s obligation to obtain a PSD or Title V permit for GHGs is triggered only if such permitting requirements are first triggered by non-GHG, or conventional, pollutants that are regulated by the New Source Review program, and exceed a significant emissions rate of 75,000 tons per year of CO 2 equivalent emissions. Until the EPA ultimately takes final action on this rulemaking, the Companies cannot predict the impact to their results of operations, financial condition and/or cash flows. In December 2018, the EPA proposed revised Standards of Performance for Greenhouse Gas Emissions from New, Modified, and Reconstructed Stationary Sources. The proposed rule would amend the previous determination that the best system of emission reduction for newly constructed coal-fired steam generating units is no longer partial carbon capture and storage. Instead, the proposed revised best system of emission reduction for this source category is the most efficient demonstrated steam cycle (e.g., supercritical steam conditions for large units and subcritical steam conditions for small units) in combination with best operating practices. In May 2024, the EPA withdrew the proposed revision to the performance standards for coal-fired steam generating units as part of a package of final rules addressing CO 2 emissions from new and existing fossil fuel-fired electric generating units. Water The CWA, as amended, is a comprehensive program requiring a broad range of regulatory tools including a permit program to authorize and regulate discharges to surface waters with strong enforcement mechanisms. The Companies must comply with applicable aspects of the CWA programs at their operating facilities. Regulation 316(b) In October 2014, the final regulations under Section 316(b) of the CWA that govern existing facilities and new units at existing facilities that employ a cooling water intake structure and that have flow levels exceeding a minimum threshold became effective. The rule establishes a national standard for impingement based on seven compliance options, but forgoes the creation of a single technology standard for entrainment. Instead, the EPA has delegated entrainment technology decisions to state regulators. State regulators are to make case-by-case entrainment technology determinations after an examination of five mandatory facility-specific factors, including a social cost-benefit test, and six optional facility-specific factors. The rule governs all electric generating stations with water withdrawals above two MGD, with a heightened entrainment analysis for those facilities over 125 MGD. Dominion Energy and Virginia Power currently have 14 and eight facilities, respectively, that are subject to the final regulations. Dominion Energy is also working with the EPA and state regulatory agencies to assess the applicability of Section 316(b) to eight hydroelectric facilities, including three Virginia Power facilities. The Companies anticipate that they may have to install impingement control technologies at certain of these stations that have once-through cooling systems. The Companies are currently evaluating the need or potential for entrainment controls under the final rule as these decisions will be made on a case-by-case basis after a thorough review of detailed biological, technological and cost benefit studies. DESC is conducting studies and implementing plans as required by the rule to determine appropriate intake structure modifications at certain facilities to ensure compliance with this rule. While the impacts of this rule could be material to the Companies’ results of operations, financial condition and/or cash flows, the existing regulatory frameworks in South Carolina and Virginia provide rate recovery mechanisms that could substantially mitigate any such impacts for the regulated electric utilities. Effluent Limitations Guidelines In September 2015, the EPA released a final rule to revise the Effluent Limitations Guidelines for the Steam Electric Power Generating Category. The final rule established updated standards for wastewater discharges that apply primarily at coal and oil steam generating stations. Affected facilities are required to convert from wet to dry or closed cycle coal ash management, improve existing wastewater treatment systems and/or install new wastewater treatment technologies in order to meet the new discharge limits. In April 2017, the EPA granted two separate petitions for reconsideration of the Effluent Limitations Guidelines final rule and stayed future compliance dates in the rule. Also in April 2017, the U.S. Court of Appeals for the Fifth Circuit granted the EPA’s request for a stay of the pending consolidated litigation challenging the rule while the EPA addresses the petitions for reconsideration. In September 2017, the EPA signed a rule to postpone the earliest compliance dates for certain waste streams regulations in the Effluent Limitations Guidelines final rule from November 2018 to November 2020; however, the latest date for compliance for these regulations was December 2023. In October 2020, the EPA released the final rule that extended the latest dates for compliance with individual facilities’ compliance dates that would vary based on circumstances and the determination by state regulators and may range from 2021 to 2028 . In May 2024, the EPA released a final rule revising the 2015 and 2020 Effluent Limitations Guidelines, establishing more stringent standards for wastewater discharges for the Steam Electric Power Generating Category, which apply primarily to wastewater discharges at coal and oil steam generating stations. Individual facilities’ compliance dates will vary based on circumstances and the determination by state regulators and may range to 2029 , except in certain circumstances when a facility will be retired by 2034 . Dominion Energy expects to complete wastewater treatment technology retrofits and modifications at DESC’s Williams generating station, with a similar project at DESC’s Wateree generation station under evaluation, to meet the requirements with the existing regulatory framework in South Carolina providing rate recovery mechanisms for costs of the projects. As discussed in Note 2, the Companies recorded an increase to their AROs in the second quarter of 2024 in connection with the expected compliance costs associated with the EPA’s May 2024 final rule concerning CCR. The Companies expect that such AROs would satisfy any AROs that would have otherwise been necessary for compliance with the EPA’s May 2024 Effluent Limitations Guidelines. Dominion Energy is currently unable to estimate what costs, if any, may be required in addition to the project for the Williams generating station, a potential project at the Wateree generating station and the recorded AROs to meet the requirements to operate certain facilities past 2034. However, Dominion Energy expects that while such costs for facility improvements, if required, could be material to the Companies’ financial condition and/or cash flows, the existing regulatory frameworks in Virginia and South Carolina provide rate recovery mechanisms that could substantially mitigate any such impacts. Waste Management and Remediation The operations of the Companies are subject to a variety of state and federal laws and regulations governing the management and disposal of solid and hazardous waste, and release of hazardous substances associated with current and/or historical operations. The CERCLA, as amended, and similar state laws, may impose joint, several and strict liability for cleanup on potentially responsible parties who owned, operated or arranged for disposal at facilities affected by a release of hazardous substances. In addition, many states have created programs to incentivize voluntary remediation of sites where historical releases of hazardous substances are identified and property owners or responsible parties decide to initiate cleanups. From time to time, the Companies may be identified as a potentially responsible party in connection with the alleged release of hazardous substances or wastes at a site. Under applicable federal and state laws, the Companies could be responsible for costs associated with the investigation or remediation of impacted sites, or subject to contribution claims by other responsible parties for their costs incurred at such sites. The Companies also may identify, evaluate and remediate other potentially impacted sites under voluntary state programs. Remediation costs may be subject to reimbursement under the Companies’ insurance policies, rate recovery mechanisms, or both. Except as described below, the Companies do not believe these matters will have a material effect on results of operations, financial condition and/or cash flows. Dominion Energy has determined that it is associated with former manufactured gas plant sites, including certain sites associated with Virginia Power. At four sites associated with Dominion Energy, remediation work has been substantially completed under federal or state oversight. Where required, the sites are following state-approved groundwater monitoring programs. Dominion Energy has proposed remediation plans for one site at Virginia Power and expects to commence remediation activities in 2025 depending on receipt of final permits and approvals. At September 30, 2024 and December 31, 2023 , Dominion Energy had $ 31 million and $ 32 million, respectively, of reserves recorded. At both September 30, 2024 and December 31, 2023 , Virginia Power had $ 25 million of reserves recorded. Dominion Energy is associated with three additional sites, including two associated with Virginia Power, which are not under investigation by any state or federal environmental agency nor the subject of any current or proposed plans to perform remediation activities. Due to the uncertainty surrounding such sites, the Companies are unable to make an estimate of the potential financial statement impacts. Other Legal Matters The Companies are defendants in a number of lawsuits and claims involving unrelated incidents of property damage and personal injury. Due to the uncertainty surrounding these matters, the Companies are unable to make an estimate of the potential financial statement impacts; however, they could have a material impact on results of operations, financial condition and/or cash flows. SCANA Legal Proceedings The following describes certain legal proceedings involving Dominion Energy, SCANA or DESC relating primarily to events occurring before closing of the SCANA Combination. Matters Fully Resolved Prior to 2024 Impacting the Consolidated Financial Statements Governmental Proceedings and Investigations In June 2018, DESC received a notice of proposed assessment of approximately $ 410 million, excluding interest, from the SCDOR following its audit of DESC’s sales and use tax returns for the periods September 1, 2008 through December 31, 2017. The proposed assessment, which includes 100 % of the NND Project, is based on the SCDOR’s position that DESC’s sales and use tax exemption for the NND Project does not apply because the facility will not become operational. In December 2020, the parties reached an agreement in principle in the amount of $ 165 million to resolve this matter. In June 2021, the parties executed a settlement agreement which allows DESC to fund the settlement amount through a combination of cash, shares of Dominion Energy common stock or real estate with an initial payment of at least $ 43 million in shares of Dominion Energy common stock. In August 2021, Dominion Energy issued 0.6 million shares of its common stock to satisfy DESC’s obligation for the initial payment under the settlement agreement. In May 2022, Dominion Energy issued an additional 0.9 million shares of its common stock to partially satisfy DESC’s remaining obligation under the settlement agreement. In June 2022, DESC requested approval from the South Carolina Commission to transfer certain real estate with a total settlement value of $ 51 million to satisfy its remaining obligation under the settlement agreement. In July 2022, the South Carolina Commission voted to approve the request and issued its final order in August 2022. In September 2022, DESC transferred certain non-utility property with a fair value of $ 28 million to the SCDOR under the settlement agreement. In December 2022, DESC transferred additional utility property with a fair value of $ 3 million to the SCDOR. In October 2022, DESC filed for approval to transfer the remaining real estate with FERC which was received in November 2022. In March 2023, DESC transferred utility property with a fair value of $ 10 million to the SCDOR resulting in a gain of $ 9 million ($ 7 million after-tax), recorded in losses (gains) on sales of assets in Dominion Energy’s Consolidated Statements of Income for the nine months ended September 30, 2023. In June 2023, DESC transferred the remaining utility property with a fair value of $ 11 million to the SCDOR resulting in a gain of $ 11 million ($ 8 million after-tax), recorded in losses (gains) on sales of assets in Dominion Energy’s Consolidated Statements of Income for the nine months ended September 30, 2023. In July 2023, DESC made a less than $ 1 million cash payment to the SCDOR to fully satisfy its remaining obligation, including applicable interest, under the settlement agreement. Nuclear Operations Nuclear Insurance Other than the items discussed below, there have been no significant changes regarding the Companies’ nuclear insurance as described in Note 23 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. During the first quarter of 2024, the total liability protection per nuclear incident available to all participants in the Secondary Financial Protection Program increased from $ 16.2 billion to $ 16.3 billion. This increase does not impact Dominion Energy’s responsibility per active unit under the Price-Anderson Amendments Act of 1988. Additionally, the Companies increased the amount of coverage purchased from commercial insurance pools for Millstone, Summer, Surry and North Anna from $ 450 million to $ 500 million with the remainder provided through the mandatory industry retrospective rating plan. Spent Nuclear Fuel As discussed in Note 23 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023, the Companies entered into contracts with the DOE for the disposal of spent nuclear fuel under provisions of the Nuclear Waste Policy Act of 1982. Guarantees, Surety Bonds and Letters of Credit Dominion Energy enters into guarantee arrangements on behalf of its consolidated subsidiaries, primarily to facilitate their commercial transactions with third parties. If any of these subsidiaries fail to perform or pay under the contracts and the counterparties seek performance or payment, Dominion Energy would be obligated to satisfy such obligation. To the extent that a liability subject to a guarantee has been incurred by one of Dominion Energy’s consolidated subsidiaries, that liability is included in the Consolidated Financial Statements. Dominion Energy is not required to recognize liabilities for guarantees issued on behalf of its subsidiaries unless it becomes probable that it will have to perform under the guarantees. Terms of the guarantees typically end once obligations have been paid. Dominion Energy currently believes it is unlikely that it would be required to perform or otherwise incur any losses associated with guarantees of its subsidiaries’ obligations. At September 30, 2024, Dominion Energy had issued the following subsidiary guarantees: Maximum (millions) Commodity transactions (1) $ 2,765 Nuclear obligations (2) 220 Solar (3) 207 Other (4) 849 Total (5)(6) $ 4,041 (1) Guarantees related to commodity commitments of certain subsidiaries. These guarantees were provided to counterparties in order to facilitate physical and financial transaction related commodities and services. (2) Guarantees primarily related to certain DGI subsidiaries regarding all aspects of running a nuclear facility. (3) Includes guarantees to facilitate the development of solar projects. (4) Guarantees related to other miscellaneous contractual obligations such as leases, environmental obligations, construction projects and insurance programs. Due to the uncertainty of workers’ compensation claims, the parental guarantee has no stated limit. (5) Excludes Dominion Energy’s guarantee of an offshore wind installation vessel discussed in Note 15 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. (6) In July 2016, Dominion Energy signed an agreement (subsequently amended most recently in December 2023) with a lessor to construct and lease a new corporate office property in Richmond, Virginia and commenced the five-year lease term in August 2019 , with certain options at the end of the initial lease term as discussed in Note 23 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. In July 2024, the agreement was amended to reflect Dominion Energy’s election to extend the lease term through July 2029 . At the end of the lease term, Dominion Energy can (i) extend the term of the lease for at least one year , subject to the approval of the participants, at current market terms, (ii) purchase the property for an amount equal to the project costs or, (iii) subject to certain terms and conditions, sell the property on behalf of the lessor to a third party using commercially reasonable efforts to obtain the highest cash purchase price for the property. If the project is sold and the proceeds from the sale are insufficient to repay the investors for the project costs, Dominion Energy may be required to make a payment to the lessor equal to the recorded lease balance. In addition, Dominion Energy had issued an additional $ 20 million of guarantees at September 30, 2024, primarily to support third parties. No amounts related to these guarantees have been recorded. Dominion Energy also had issued four guarantees as of September 30, 2024 related to Cove Point, previously an equity method investment, in support of terminal services, transportation and construction. Two of the Cove Point guarantees have a cumulative maximum exposure of $ 1.9 billion while the other two guarantees have no maximum limit. No amounts related to these guarantees have been recorded. Additionally, at September 30, 2024 , Dominion Energy had purchased $ 319 million of surety bonds, including $ 250 million at Virginia Power, and authorized the issuance of letters of credit by financial institutions of $ 21 million to facilitate commercial transactions by its subsidiaries with third parties. Under the terms of surety bonds, the Companies are obligated to indemnify the respective surety bond company for any amounts paid.

Credit Risk

Credit Risk	9 Months Ended
Credit Risk	Sep. 30, 2024
Risks and Uncertainties [Abstract]
Credit Risk	Note 18. Credit Risk The Companies’ accounting policies for credit risk are discussed in Note 24 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. At September 30, 2024 , Dominion Energy’s credit exposure totaled $ 138 million, primarily related to price risk management activities. Of this amount, investment grade counterparties, including those internally rated, represented 74 %. No single counterparty, whether investment grade or non-investment grade, exceeded $ 28 million of exposure. At September 30, 2024 , Virginia Power’s exposure related to wholesale customers totaled $ 82 million. Of this amount, investment grade counterparties, including those internally rated, represented 58 %. No single counterparty, whether investment grade or non-investment grade, exceeded $ 10 million of exposure. Credit-Related Contingent Provisions Certain of Dominion Energy and Virginia Power’s derivative instruments contain credit-related contingent provisions. These provisions require Dominion Energy and Virginia Power to provide collateral upon the occurrence of specific events, primarily a credit rating downgrade. If the credit-related contingent features underlying these instruments that are in a liability position and not fully collateralized with cash were fully triggered, Dominion Energy and Virginia Power would have been required to post additional collateral to its counterparties of $ 19 million and $ 13 million, respectively, as of September 30, 2024 , and $ 28 million and $ 14 million, respectively, as of December 31, 2023 . The collateral that would be required to be posted includes the impacts of any offsetting asset positions and any amounts already posted for derivatives, non-derivative contracts and derivatives elected under the normal purchases and normal sales exception, per contractual terms. Dominion Energy and Virginia Power had no posted collateral at September 30, 2024 or December 31, 2023 related to derivatives with credit-related contingent provisions that are in a liability position and not fully collateralized with cash. In addition, Dominion Energy and Virginia Power had both posted letters of credit as collateral with counterparties covering less than $ 1 million of fair value of derivative instruments in a liability position at December 31, 2023 . The aggregate fair value of all derivative instruments with credit related contingent provisions that are in a liability position and not fully collateralized with cash for Dominion Energy and Virginia Power was $ 19 million and $ 13 million, respectively, as of September 30, 2024 and $ 28 million and $ 14 million, respectively, as of December 31, 2023, which does not include the impact of any offsetting asset positions. See Note 9 for additional information about derivative instruments.

Related-Party Transactions

Related-Party Transactions	9 Months Ended
Related-Party Transactions	Sep. 30, 2024
Related Party Transactions [Abstract]
Related-Party Transactions	Note 19. Related-Party Transactions Dominion Energy’s transactions with equity method investments are described in Note 10. Virginia Power engages in related-party transactions primarily with other Dominion Energy subsidiaries (affiliates). Virginia Power’s receivable and payable balances with affiliates are settled based on contractual terms or on a monthly basis, depending on the nature of the underlying transactions. Virginia Power is included in Dominion Energy’s consolidated federal income tax return and, where applicable, combined income tax returns for Dominion Energy are filed in various states. A discussion of Virginia Power’s significant related-party transactions follows. Virginia Power transacts with affiliates for certain quantities of natural gas and other commodities in the ordinary course of business. Virginia Power also enters into certain commodity derivative contracts with affiliates. Virginia Power uses these contracts, which are principally comprised of forward commodity purchases, to manage commodity price risks associated with purchases of natural gas. At September 30, 2024 , Virginia Power’s derivative assets and liabilities with affiliates were $ 11 million and $ 43 million, respectively. At December 31, 2023 , Virginia Power’s derivative assets and liabilities with affiliates were $ 1 million and $ 79 million, respectively. See Note 9 for additional information. Virginia Power participates in certain Dominion Energy benefit plans described in Note 22 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. At September 30, 2024 and December 31, 2023 , amounts due to Dominion Energy associated with the Dominion Energy Pension Plan and included in other deferred credits and other liabilities in the Consolidated Balance Sheets were $ 493 million and $ 456 million, respectively. At September 30, 2024 and December 31, 2023 , Virginia Power’s amounts due from Dominion Energy associated with the Dominion Energy Retiree Health and Welfare Plan and included in other deferred charges and other assets in the Consolidated Balance Sheets were $ 640 million and $ 584 million, respectively. DES and other affiliates provide accounting, legal, finance and certain administrative and technical services and licenses to Virginia Power. In addition, Virginia Power provides certain services to affiliates, including charges for facilities and equipment usage. The financial statements for all years presented include costs for certain general, administrative and corporate expenses assigned by DES to Virginia Power on the basis of direct and allocated methods in accordance with Virginia Power’s services agreements with DES. Where costs incurred cannot be determined by specific identification, the costs are allocated based on the proportional level of effort devoted by DES resources that is attributable to the entity, determined by reference to number of employees, salaries and wages and other similar measures for the relevant DES service. Management believes the assumptions and methodologies underlying the allocation of general corporate overhead expenses are reasonable. Presented below are Virginia Power’s significant transactions with DES and other affiliates: Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 (millions) Commodity purchases from affiliates $ 147 $ 146 $ 453 $ 463 Services provided by affiliates (1) 169 149 495 441 Services provided to affiliates 4 7 12 15 (1) Includes capitalized expenditures of $ 59 million and $ 51 million for the three months ended September 30, 2024 and 2023 , respectively and $ 170 million and $ 151 million for the nine months ended September 30, 2024 and 2023 , respectively. Virginia Power has borrowed funds from Dominion Energy under short-term borrowing arrangements. There were $ 633 million and $ 500 million in short-term demand note borrowings from Dominion Energy as of September 30, 2024 and December 31, 2023 , respectively. Virginia Power had no outstanding borrowings, net of repayments, under the Dominion Energy money pool for its nonregulated subsidiaries as of September 30, 2024 and December 31, 2023 . Interest charges related to Virginia Power’s borrowings from Dominion Energy were $ 17 million and $ 27 million for the three months ended September 30, 2024 and 2023 , respectively and $ 23 million and $ 72 million for the nine months ended September 30, 2024 and 2023, respectively. There were no issuances of Virginia Power’s common stock to Dominion Energy for the three and nine months ended September 30, 2024 and 2023. In October 2024, Virginia Power paid a $ 600 million dividend to Dominion Energy. In 2023, Virginia Power entered into a lease contract with an affiliated entity for the use of a Jones Act compliant offshore wind installation vessel currently under development with commencement of the 20-month lease term in August 2025 at a total cost of approximately $ 240 million plus ancillary services. Virginia Power filed an application with the Virginia Commission to amend the lease agreement to potentially accelerate the commencement of the lease term in August 2024 and received approval in October 2024. Virginia Power filed a corresponding application with the North Carolina Commission in September 2024.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
Employee Benefit Plans	Sep. 30, 2024
Retirement Benefits [Abstract]
Employee Benefit Plans	Note 20. Employee Benefit Plans Net Periodic Benefit (Credit) Cost The service cost component of net periodic benefit (credit) cost is reflected in other operations and maintenance expense in Dominion Energy’s Consolidated Statements of Income, except for less than $ 1 million and $ 5 million for the three and nine months ended September 30, 2024 , respectively, and $ 4 million and $ 12 million for the three and nine months ended September 30, 2023 , respectively, presented in discontinued operations. The non-service cost components of net periodic benefit (credit) cost are reflected in other income (expense) in Dominion Energy’s Consolidated Statements of Income, except for $ — million and $ 13 million for the three and nine months ended September 30, 2024 , respectively, and $( 11 ) million and $( 34 ) million for the three and nine months ended September 30, 2023 , respectively, presented in discontinued operations. The components of Dominion Energy’s provision for net periodic benefit cost (credit) are as follows: Pension Benefits Other Postretirement Benefits Quarter-to-Date Year-to-Date Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 2024 2023 2024 2023 (millions) Service cost $ 19 $ 24 $ 63 $ 72 $ 2 $ 3 $ 8 $ 10 Interest cost 107 111 324 332 15 15 43 46 Expected return on plan assets ( 200 ) ( 216 ) ( 611 ) ( 648 ) ( 43 ) ( 37 ) ( 128 ) ( 113 ) Amortization of prior service 1 — 1 — ( 9 ) ( 10 ) ( 27 ) ( 28 ) Amortization of net actuarial 3 — 16 — ( 1 ) ( 1 ) ( 5 ) ( 4 ) Settlements and curtailments (1) — — 4 — ( 1 ) — ( 1 ) — Plan amendment — — 22 — — — — — Net periodic benefit (credit) cost $ ( 70 ) $ ( 81 ) $ ( 181 ) $ ( 244 ) $ ( 37 ) $ ( 30 ) $ ( 110 ) $ ( 89 ) (1) 2024 amount relates to Dominion Energy nonqualified pension plan. Pension and Other Postretirement Benefit Plan Remeasurements In the first quarter of 2024, Dominion Energy remeasured its pension and other postretirement benefit plans as a result of the close of the East Ohio Transaction. The remeasurement and transfer to Enbridge of pension plan assets and liabilities resulted in a decrease in the pension benefit obligation of $ 419 million, inclusive of $ 195 million transferred upon closing, and a decrease in the fair value of the pension plan assets of $ 555 million, inclusive of $ 531 million transferred upon closing. In addition, the remeasurement and transfer to Enbridge of other postretirement benefit plan assets and liabilities resulted in a decrease in the accumulated postretirement benefit obligation of $ 38 million, inclusive of $ 22 million transferred upon closing, and a decrease in the fair value of the other postretirement benefit plan assets of $ 19 million, inclusive of $ 36 million transferred upon closing. The impact of the remeasurement and transfer of pension and other postretirement benefit plan assets and liabilities on net periodic benefit cost (credit) was recognized prospectively from the remeasurement date. The remeasurement is expected to decrease the net periodic pension benefit credit by approximately $ 11 million and increase the net periodic other postretirement benefit credit by approximately $ 1 million for the year ending December 31, 2024, excluding the impact of a one-time plan amendment. The discount rate used for the remeasurement was 5.62 % for the pension plans and 5.61 %- 5.62 % for the other postretirement benefit plans. The net actuarial loss (gain) and prior service cost (credit) related to the transferred pension and other postretirement plan assets and liabilities included in the East Ohio Transaction loss on sale was $ 147 million for pension and $( 9 ) million for other postretirement benefits. In the second quarter of 2024, Dominion Energy remeasured its pension and other postretirement benefit plans as a result of the close of the Questar Gas Transaction. The remeasurement and transfer to Enbridge of pension plan assets and liabilities resulted in a decrease in the pension benefit obligation of $ 251 million, inclusive of $ 136 million transferred upon closing, and a decrease in the fair value of the pension plan assets of $ 248 million, inclusive of $ 138 million transferred upon closing. In addition, the remeasurement and transfer to Enbridge of other postretirement benefit plan assets and liabilities resulted in a decrease in the accumulated postretirement benefit obligation of $ 14 million, inclusive of $ 6 million transferred upon closing, and an increase in the fair value of the other postretirement benefit plan assets of $ 24 million, inclusive of $ 5 million transferred upon closing. The impact of the remeasurement and transfer of pension and other postretirement benefit plan assets and liabilities on net periodic benefit cost (credit) was recognized prospectively from the remeasurement date. The remeasurement is expected to increase the net periodic pension benefit credit by approximately $ 8 million and increase the net periodic other postretirement benefit credit by $ 3 million for the year ending December 31, 2024. The discount rate used for the remeasurement was 5.75 % for the pension plan and 5.74 % for the other postretirement benefit plan. The net actuarial loss and prior service cost (credit) related to the transferred pension and other postretirement plan assets and liabilities included in the Questar Gas Transaction loss on sale was $ 49 million for pension a nd $ 1 million for other postretirement benefits. All other assumptions used for the remeasurements were consistent with the measurement as of December 31, 2023. Employer Contributions During the three and nine months ended September 30, 2024 , Dominion Energy made $ 33 million and $ 40 million of contributions to its qualified defined benefit pension plans. In October 2024, Dominion Energy made an additional $ 6 million of contributions to its qualified defined benefit pension plans. Dominion Energy is not required to make any additional contributions to its qualified defined benefit pension plans in 2024. Dominion Energy is not required to make any contributions to its VEBAs associated with its other postretirement plans in 2024. Dominion Energy considers voluntary contributions from time to time, either in the form of cash or equity securities. Other Employee Matters In the first quarter of 2024, Dominion Energy recorded a charge of $ 23 million ($ 17 million after-tax) within discontinued operations attributable to a contribution to its defined contribution employee savings plan associated with the closing of the East Ohio Transaction. Additionally in the first quarter of 2024, Dominion Energy recorded a charge of $ 13 million ($ 10 million after-tax) in other operations and maintenance expense related to a severance accrual for certain employees in connection with the business review.

Operating Segments

Operating Segments	9 Months Ended
Operating Segments	Sep. 30, 2024
Segment Reporting [Abstract]
Operating Segments	Note 21. Operating Segments The Companies are organized primarily on the basis of products and services sold in the U.S. A description of the operations included in the Companies’ primary operating segments is as follows: Primary Operating Segment Description of Operations Dominion Virginia Dominion Energy Virginia Regulated electric distribution X X Regulated electric transmission X X Regulated electric generation fleet (1) X X Dominion Energy South Carolina Regulated electric distribution X Regulated electric transmission X Regulated electric generation fleet X Regulated gas distribution and storage X Contracted Energy (2) Nonregulated electric generation fleet X (1) Includes Virginia Power’s non-jurisdictional solar generation operations. (2) Includes renewable natural gas operations. In addition to the operating segments above, the Companies also report a Corporate and Other segment. Dominion Energy The Corporate and Other Segment of Dominion Energy includes its corporate, service company and other functions (including unallocated debt) as well as its noncontrolling interest in Dominion Privatization. In addition, Corporate and Other includes specific items attributable to Dominion Energy’s operating segments that are not included in profit measures evaluated by executive management in assessing the segments’ performance or in allocating resources, including the net impact of the operations reflected as discontinued operations, which includes the entities included in the East Ohio (through March 2024), Questar Gas (through May 2024) and PSNC (through September 2024) Transactions, a noncontrolling interest in Cove Point (through September 2023), solar generation facility development operations (through April 2024) and a noncontrolling interest in Atlantic Coast Pipeline as discussed in Notes 3 and 10 as well as Notes 3 and 9 to the Consolidated Financial Statements in Dominion Energy’s Annual Report on Form 10-K for the year ended December 31, 2023. In the nine months ended September 30, 2024 , Dominion Energy reported after-tax net income of $ 28 million in the Corporate and Other segment, including $ 319 million of after-tax net income for specific items with $ 155 million of after-tax net income attributable to its operating segments. In the nine months ended September 30, 2023 , Dominion Energy reported after-tax net loss of $ 14 million in the Corporate and Other segment, including $ 245 million of after-tax net income for specific items all of which was attributable to its operating segments. The net income for specific items attributable to Dominion Energy’s operating segments in 2024 primarily related to the impact of the following items: • A $ 518 million ($ 402 million after-tax) gain related to investments in nuclear decommissioning trust funds , attributable to: • Contracted Energy ($ 347 million after-tax); and • Dominion Energy Virginia ($ 55 million after-tax); • A $ 107 million ($ 82 million after-tax) loss related to economic hedging activities, attributable to Contracted Energy; • $ 60 million ($ 46 million after-tax) of charges for the impairment of certain nonregulated renewable natural gas facilities, attributable to Contracted Energy; • A $ 58 million ($ 44 million after-tax) charge in connection with the electric base rate case in South Carolina, attributable to Dominion Energy South Carolina; • A $ 47 million ($ 35 million after-tax) charge in connection with a settlement of an agreement, attributable to Contracted Energy; and • A $ 30 million ($ 22 million after-tax) charge related to the write-off of certain early-stage development costs, attributable to Dominion Energy Virginia. The net income for specific items attributable to Dominion Energy’s operating segments in 2023 primarily related to the impact of the following items: • A $ 335 million ($ 255 million after-tax) gain related to economic hedging activities, attributable to Contracted Energy; • A $ 183 million ($ 142 million after-tax) gain related to investments in nuclear decommissioning trust funds , attributable to: • Contracted Energy ($ 124 million after-tax); and • Dominion Energy Virginia ($ 18 million after-tax); • A $ 183 million ($ 136 million after-tax) charge for amortization of a regulatory asset established in connection with the settlement of the 2021 Triennial Review, attributable to Dominion Energy Virginia; • A $ 36 million ($ 27 million after-tax) charge for the write-off of certain previously deferred amounts related to the cessation of certain riders effective July 2023, attributable to Dominion Energy Virginia; and • A $ 31 million ($ 23 million after-tax) benefit related to real estate transactions, including gains on the transfer of property to satisfy litigation associated with the NND Project, attributable to Dominion Energy South Carolina. The following table presents segment information pertaining to Dominion Energy’s operations: Dominion Dominion Contracted Corporate Adjustments Consolidated (millions) Three Months Ended September 30, 2024 Total revenue from external $ 2,760 $ 846 $ 256 $ 79 $ — $ 3,941 Intersegment revenue 2 2 4 252 ( 260 ) — Total operating revenue 2,762 848 260 331 ( 260 ) 3,941 Net loss from discontinued — — — ( 13 ) — ( 13 ) Net income attributable to 662 147 83 62 — 954 Three Months Ended September 30, 2023 Total revenue from external $ 2,649 $ 944 $ 225 $ ( 8 ) $ — $ 3,810 Intersegment revenue ( 4 ) 1 6 232 ( 235 ) — Total operating revenue 2,645 945 231 224 ( 235 ) 3,810 Net loss from discontinued — — — ( 541 ) — ( 541 ) Net income (loss) attributable to 535 143 52 ( 573 ) — 157 Nine Months Ended September 30, 2024 Total revenue from external $ 7,786 $ 2,496 $ 843 $ ( 66 ) $ — $ 11,059 Intersegment revenue 2 7 9 743 ( 761 ) — Total operating revenue 7,788 2,503 852 677 ( 761 ) 11,059 Net income from discontinued — — — 182 — 182 Net income attributable to 1,571 296 305 28 — 2,200 Nine Months Ended September 30, 2023 Total revenue from external $ 7,286 $ 2,559 $ 659 $ 355 $ — $ 10,859 Intersegment revenue ( 5 ) 4 14 694 ( 707 ) — Total operating revenue 7,281 2,563 673 1,049 ( 707 ) 10,859 Net loss from discontinued — — — ( 92 ) — ( 92 ) Net income (loss) attributable to 1,315 302 118 ( 14 ) — 1,721 Intersegment sales and transfers for Dominion Energy are based on contractual arrangements and may result in intersegment profit or loss that is eliminated in consolidation, including amounts related to entities presented within discontinued operations. Virginia Power The Corporate and Other Segment of Virginia Power primarily includes specific items attributable to its operating segment that are not included in profit measures evaluated by executive management in assessing the segment’s performance or in allocating resources. In the nine months ended September 30, 2024 , Virginia Power reported after-tax net income of $ 27 million in the Corporate and Other segment, including $ 25 million of after-tax net income for specific items all of which was attributable to its operating segment. In the nine months ended September 30, 2023 , Virginia Power reported after-tax net expenses of $ 151 million in the Corporate and Other segment, including $ 155 million of after-tax net expenses for specific items with $ 154 million of after-tax net expenses attributable to its operating segment. The net income for specific items attributable to Virginia Power’s operating segment in 2024 primarily related to the impact of the following items: • A $ 74 million ($ 55 million after-tax) gain related to investments in nuclear decommissioning trust funds ; and • A $ 30 million ($ 22 million after-tax) charge related to the write-off of certain early-stage development costs. The net expenses for specific items attributable to Virginia Power’s operating segment in 2023 primarily related to the impact of the following item: • A $ 183 million ($ 136 million after-tax) charge for amortization of a regulatory asset established in connection with the settlement of the 2021 Triennial Review; • A $ 36 million ($ 27 million after-tax) charge for the write-off of certain previously deferred amounts related to the cessation of certain riders effective July 2023; and • A $ 24 million ($ 18 million after-tax) gain related to investments in nuclear decommissioning trust funds . The following table presents segment information pertaining to Virginia Power’s operations: Dominion Corporate Consolidated (millions) Three Months Ended September 30, 2024 Operating revenue $ 2,762 $ — $ 2,762 Net income (loss) 662 ( 8 ) 654 Three Months Ended September 30, 2023 Operating revenue $ 2,645 $ — $ 2,645 Net income (loss) 535 ( 60 ) 475 Nine Months Ended September 30, 2024 Operating revenue $ 7,788 $ — $ 7,788 Net income 1,571 27 1,598 Nine Months Ended September 30, 2023 Operating revenue $ 7,281 $ — $ 7,281 Net income (loss) 1,315 ( 151 ) 1,164

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	9 Months Ended
Significant Accounting Policies (Policies)	Sep. 30, 2024
Accounting Policies [Abstract]
Basis of Accounting	As permitted by the rules and regulations of the SEC, the Companies’ accompanying unaudited Consolidated Financial Statements contain certain condensed financial information and exclude certain footnote disclosures normally included in annual audited consolidated financial statements prepared in accordance with GAAP. These unaudited Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and Notes in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. In the Companies’ opinion, the accompanying unaudited Consolidated Financial Statements contain all adjustments necessary to present fairly their financial position at September 30, 2024, their results of operations and changes in equity for the three and nine months ended September 30, 2024 and 2023 and their cash flows for the nine months ended September 30, 2024 and 2023 . Such adjustments are normal and recurring in nature unless otherwise noted.
Estimates	The Companies make certain estimates and assumptions in preparing their Consolidated Financial Statements in accordance with GAAP. These estimates and assumptions affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses for the periods presented. Actual results may differ from those estimates.
Consolidation	The Companies’ accompanying unaudited Consolidated Financial Statements include, after eliminating intercompany transactions and balances, their accounts, those of their respective majority-owned subsidiaries and non-wholly-owned entities in which they have a controlling financial interest. For certain partnership structures, income is allocated based on the liquidation value of the underlying contractual arrangements.
Reclassifications	Certain amounts in the Companies’ 2023 Consolidated Financial Statements and Notes have been reclassified to conform to the 2024 presentation for comparative purposes; however, such reclassifications did not affect the Companies’ net income, total assets, liabilities, equity or cash flows. Amounts disclosed for Dominion Energy are inclusive of Virginia Power, where applicable. There have been no significant changes from Note 2 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023, with the exception of the items described below.
Cash, Restricted Cash and Equivalents	Cash, Restricted Cash and Equivalents Restricted Cash and Equivalents The following table provides a reconciliation of the total cash, restricted cash and equivalents reported within the Companies’ Consolidated Balance Sheets to the corresponding amounts reported within the Companies’ Consolidated Statements of Cash Flows for the nine months ended September 30, 2024 and 2023: Cash, Restricted Cash and Equivalents Cash, Restricted Cash and Equivalents September 30, 2024 September 30, 2023 December 31, 2023 December 31, 2022 (millions) Dominion Energy Cash and cash equivalents (1) $ 1,776 $ 176 $ 217 $ 153 Restricted cash and equivalents (2)(4) 126 71 84 188 Cash, restricted cash and equivalents shown in the $ 1,902 $ 247 $ 301 $ 341 Virginia Power Cash and cash equivalents $ 28 $ 37 $ 90 $ 22 Restricted cash and equivalents (3)(4) 104 — — 2 Cash, restricted cash and equivalents shown in the $ 132 $ 37 $ 90 $ 24 (1) At September 30, 2023, December 31, 2023 and December 31, 2022, Dominion Energy had $ 39 million, $ 33 million and $ 34 million, respectively, of cash and cash equivalents included in current assets held for sale. (2) At September 30, 2023, December 31, 2023 and December 31, 2022, Dominion Energy had $ 4 million, $ 4 million and $ 2 million, respectively, of restricted cash and equivalents included in current assets held for sale with the remaining balances presented within other current assets in Dominion Energy’s Consolidated Balance Sheets. (3) Restricted cash and equivalents balances are presented within other current assets in Virginia Power’s Consolidated Balance Sheets. (4) Includes $ 100 million attributable to VIEs at September 30, 2024 . Supplemental Cash Flow Information The following table provides supplemental disclosure of cash flow information related to Dominion Energy: Nine Months Ended September 30, 2024 2023 (millions) Significant noncash investing and financing activities: (1) Accrued capital expenditures $ 930 $ 884 Leases (2) 183 294 (1) See Notes 3 and 17 for noncash financing activities related to debt assumed with closing of the East Ohio Transaction, the Questar Gas Transaction and the PSNC Transaction and the transfer of property associated with the settlement of litigation. (2) Includes $ 100 million and $ 51 million of financing leases at September 30, 2024 and 2023 , respectively, and $ 83 million and $ 243 million of operating leases at September 30, 2024 and 2023 , respectively. The following table provides supplemental disclosure of cash flow information related to Virginia Power: Nine Months Ended September 30, 2024 2023 (millions) Significant noncash investing and financing activities: Accrued capital expenditures $ 738 $ 646 Leases (1) 156 253 (1) Includes $ 89 million and $ 44 million of financing leases at September 30, 2024 and 2023 , respectively, and $ 67 million and $ 209 million of operating leases at September 30, 2024 and 2023 , respectively.
Fair Value Measurements	The Companies enter into certain physical and financial forwards, futures and options, which are considered Level 3 as they have one or more inputs that are not observable and are significant to the valuation. The discounted cash flow method is used to value Level 3 physical and financial forwards and futures contracts. An option model is used to value Level 3 physical options. The discounted cash flow model for forwards and futures calculates mark-to-market valuations based on forward market prices, original transaction prices, volumes, risk-free rate of return and credit spreads. The inputs into the option models are the forward market prices, implied price volatilities, risk-free rate of return, the option expiration dates, the option strike prices, the original sales prices and volumes. For Level 3 fair value measurements, certain forward market prices and implied price volatilities are considered unobservable.
Regulatory Matters Involving Potential Loss Contingencies	Regulatory Matters Involving Potential Loss Contingencies As a result of issues generated in the ordinary course of business, the Companies are involved in various regulatory matters. Certain regulatory matters may ultimately result in a loss; however, as such matters are in an initial procedural phase, involve uncertainty as to the outcome of pending reviews or orders, and/or involve significant factual issues that need to be resolved, it is not possible for the Companies to estimate a range of possible loss. For regulatory matters that the Companies cannot estimate, a statement to this effect is made in the description of the matter. Other matters may have progressed sufficiently through the regulatory process such that the Companies are able to estimate a range of possible loss. For regulatory matters that the Companies are able to reasonably estimate a range of possible losses, an estimated range of possible loss is provided, in excess of the accrued liability (if any) for such matters. Any estimated range is based on currently available information, involves elements of judgment and significant uncertainties and may not represent the Companies’ maximum possible loss exposure. The circumstances of such regulatory matters will change from time to time and actual results may vary significantly from the current estimate. For current matters not specifically reported below, management does not anticipate that the outcome from such matters would have a material effect on the Companies’ financial position, liquidity or results of operations.
Commitments and Contingencies	As a result of issues generated in the ordinary course of business, the Companies are involved in legal proceedings before various courts and are periodically subject to governmental examinations (including by regulatory authorities), inquiries and investigations. Certain legal proceedings and governmental examinations involve demands for unspecified amounts of damages, are in an initial procedural phase, involve uncertainty as to the outcome of pending appeals or motions or involve significant factual issues that need to be resolved, such that it is not possible for the Companies to estimate a range of possible loss. For such matters that the Companies cannot estimate, a statement to this effect is made in the description of the matter. Other matters may have progressed sufficiently through the litigation or investigative processes such that the Companies are able to estimate a range of possible loss. For legal proceedings and governmental examinations that the Companies are able to reasonably estimate a range of possible losses, an estimated range of possible loss is provided, in excess of the accrued liability (if any) for such matters. The Companies maintain various insurance programs, including general liability insurance coverage which provides coverage for personal injury or wrongful death cases. Any accrued liability is recorded on a gross basis with a receivable also recorded for any probable insurance recoveries. Estimated ranges of loss are inclusive of legal fees and net of any anticipated insurance recoveries. Any estimated range is based on currently available information and involves elements of judgment and significant uncertainties. Any estimated range of possible loss may not represent the Companies’ maximum possible loss exposure. The circumstances of such legal proceedings and governmental examinations will change from time to time and actual results may vary significantly from the current estimate. For current proceedings not specifically reported below, management does not anticipate that the liabilities, if any, arising from such proceedings would have a material effect on the Companies’ financial position, liquidity or results of operations.
Guarantees, Surety Bonds and Letters of Credit	Dominion Energy enters into guarantee arrangements on behalf of its consolidated subsidiaries, primarily to facilitate their commercial transactions with third parties. If any of these subsidiaries fail to perform or pay under the contracts and the counterparties seek performance or payment, Dominion Energy would be obligated to satisfy such obligation. To the extent that a liability subject to a guarantee has been incurred by one of Dominion Energy’s consolidated subsidiaries, that liability is included in the Consolidated Financial Statements. Dominion Energy is not required to recognize liabilities for guarantees issued on behalf of its subsidiaries unless it becomes probable that it will have to perform under the guarantees. Terms of the guarantees typically end once obligations have been paid. Dominion Energy currently believes it is unlikely that it would be required to perform or otherwise incur any losses associated with guarantees of its subsidiaries’ obligations.
Property, Plant and Equipment	Property, Plant and Equipment Virginia Power recorded a $ 25 million ($ 18 million after-tax) charge during the third quarter of 2024 within impairment of assets and other charges in its Consolidated Statements of Income related to the write-off of early-stage development costs associated with a hydroelectric pumped storage facility that it is no longer considering constructing.
Asset Retirement Obligations	Asset Retirement Obligations In May 2024, the EPA released a final rule to regulate inactive surface impoundments located at retired generating stations that contained CCR and liquids after October 2015, and certain other inactive or previously closed surface impoundments, landfills or other areas that contain accumulations of CCR. Dominion Energy believes that it may have inactive or closed units or areas that could be subject to the final rule at up to 19 different stations, including 12 at Virginia Power. In connection with this rule, in the second quarter of 2024, Dominion Energy and Virginia Power recorded an increase to their AROs of $ 1.1 billion and $ 420 million, respectively, with a corresponding increase of $ 536 million and $ 234 million, respectively, to regulatory assets for amounts recoverable through retail electric rates, including riders, for electric generation stations that have been retired, $ 505 million and $ 152 million, respectively, to property, plant and equipment for amounts recoverable for electric generation stations that are currently in service and $ 34 million to other deferred charges and other assets for amounts associated with non-jurisdictional customers at Virginia Power. In the third quarter of 2024, Dominion Energy recorded an adjustment to decrease the ARO and related property, plant and equipment by $ 215 million to reflect updated information concerning one facility. The actual AROs related to CCRs may vary substantially from the estimates used to record the obligation.
New Accounting Standards	New Accounting Standards Climate-Related Disclosures In March 2024, the SEC issued guidance for climate-related disclosures. The guidance requires disclosure of the financial statement impacts of severe weather events and other natural conditions, including amounts capitalized or expensed as well as any associated recoveries. In addition, the guidance requires disclosure of amounts related to renewable energy credits or carbon offsets if utilized as a material component of plans to achieve climate-related targets or goals. This guidance, which is currently subject to a stay issued by the SEC, would be effective for the fiscal year beginning January 1, 2025. The Companies expect this guidance to only impact their disclosures with no impacts to their results of operations, cash flows or financial condition.

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	9 Months Ended
Significant Accounting Policies (Tables)	Sep. 30, 2024
Accounting Policies [Abstract]
Reconciliation of Total Cash, Restricted Cash and Equivalents	The following table provides a reconciliation of the total cash, restricted cash and equivalents reported within the Companies’ Consolidated Balance Sheets to the corresponding amounts reported within the Companies’ Consolidated Statements of Cash Flows for the nine months ended September 30, 2024 and 2023: Cash, Restricted Cash and Equivalents Cash, Restricted Cash and Equivalents September 30, 2024 September 30, 2023 December 31, 2023 December 31, 2022 (millions) Dominion Energy Cash and cash equivalents (1) $ 1,776 $ 176 $ 217 $ 153 Restricted cash and equivalents (2)(4) 126 71 84 188 Cash, restricted cash and equivalents shown in the $ 1,902 $ 247 $ 301 $ 341 Virginia Power Cash and cash equivalents $ 28 $ 37 $ 90 $ 22 Restricted cash and equivalents (3)(4) 104 — — 2 Cash, restricted cash and equivalents shown in the $ 132 $ 37 $ 90 $ 24 (1) At September 30, 2023, December 31, 2023 and December 31, 2022, Dominion Energy had $ 39 million, $ 33 million and $ 34 million, respectively, of cash and cash equivalents included in current assets held for sale. (2) At September 30, 2023, December 31, 2023 and December 31, 2022, Dominion Energy had $ 4 million, $ 4 million and $ 2 million, respectively, of restricted cash and equivalents included in current assets held for sale with the remaining balances presented within other current assets in Dominion Energy’s Consolidated Balance Sheets. (3) Restricted cash and equivalents balances are presented within other current assets in Virginia Power’s Consolidated Balance Sheets. (4) Includes $ 100 million attributable to VIEs at September 30, 2024 .
Schedule of Supplemental Cash Flow Information	The following table provides supplemental disclosure of cash flow information related to Dominion Energy: Nine Months Ended September 30, 2024 2023 (millions) Significant noncash investing and financing activities: (1) Accrued capital expenditures $ 930 $ 884 Leases (2) 183 294 (1) See Notes 3 and 17 for noncash financing activities related to debt assumed with closing of the East Ohio Transaction, the Questar Gas Transaction and the PSNC Transaction and the transfer of property associated with the settlement of litigation. (2) Includes $ 100 million and $ 51 million of financing leases at September 30, 2024 and 2023 , respectively, and $ 83 million and $ 243 million of operating leases at September 30, 2024 and 2023 , respectively. The following table provides supplemental disclosure of cash flow information related to Virginia Power: Nine Months Ended September 30, 2024 2023 (millions) Significant noncash investing and financing activities: Accrued capital expenditures $ 738 $ 646 Leases (1) 156 253 (1) Includes $ 89 million and $ 44 million of financing leases at September 30, 2024 and 2023 , respectively, and $ 67 million and $ 209 million of operating leases at September 30, 2024 and 2023 , respectively.

Acquisitions and Dispositions (

Acquisitions and Dispositions (Tables)	9 Months Ended
Acquisitions and Dispositions (Tables)	Sep. 30, 2024
Results of Operations Reported within Discontinued Operations	The following table represents selected information regarding the results of operations, which were reported within discontinued operations in Dominion Energy’s Consolidated Statements of Income: Three Months Ended Nine Months Ended PSNC Transaction (1) East Ohio (1) PSNC (1) Questar Gas (1) Other (millions) Operating revenue $ 81 $ 229 $ 488 $ 894 $ — Operating expense (2) 91 254 312 746 ( 8 ) Other income (expense) 5 ( 17 ) 11 2 — Interest and related charges 16 15 44 25 — Income (loss) before income taxes ( 21 ) ( 57 ) 143 125 8 Income tax expense (benefit) ( 9 ) 9 44 46 — Net income (loss) attributable to Dominion Energy (3) $ ( 12 ) $ ( 66 ) $ 99 $ 79 $ 8 (1) Represents amounts attributable to Dominion Energy prior to the closing of the East Ohio Transaction which closed on March 6, 2024, the PSNC Transaction which closed on September 30, 2024 and the Questar Gas Transaction which closed on May 31, 2024. (2) East Ohio Transaction includes a charge of $ 45 million ($ 33 million after-tax) associated with an increase to certain pension retirement benefits attributable to a plan amendment and a contribution to the defined contribution employee savings plan. See Note 20 for further information on these transactions. (3) Excludes $ 2 million and $( 71 ) million of income tax expense (benefit) attributable to consolidated state adjustments for the three and nine months ended September 30, 2024 , respectively. Three Months Ended September 30, 2023 Nine Months Ended September 30, 2023 East Ohio Transaction PSNC Transaction Questar Gas Transaction Other East Ohio PSNC Questar Gas Other (millions) Operating revenue $ 214 $ 86 $ 150 $ 2 $ 761 $ 532 $ 1,151 $ 5 Operating expense (1) 128 80 127 7 497 386 939 29 Other income (expense) 7 3 3 — 22 8 6 — Interest and related charges 19 13 17 — 51 38 50 1 Income (loss) before income taxes 74 ( 4 ) 9 ( 5 ) 235 116 168 ( 25 ) Income tax expense (benefit) (2) 39 383 525 ( 2 ) 58 409 557 ( 7 ) Net income (loss) attributable to Dominion Energy (3) $ 35 $ ( 387 ) $ ( 516 ) $ ( 3 ) $ 177 $ ( 293 ) $ ( 389 ) $ ( 18 ) (1) Other includes a charge of $ 15 million ($ 11 million after-tax) recorded in the second quarter of 2023 associated with the impairment of certain nonregulated solar assets. (2) Includes amounts recorded in the third quarter of 2023 to reflect the recognition of deferred taxes on the outside basis of the applicable entities’ stock upon meeting the classification as held for sale. (3) Excludes $ 6 million and $ 2 million of income tax expense attributable to consolidated state and interim period tax allocation adjustments for the three and nine months ended September 30, 2023 , respectively.
Schedule Of Major Classes Of Assets And Liabilities Relating To The Disposal Groups Reported As Held For Sale	The carrying value of major classes of assets and liabilities relating to the disposal groups, which are reported as held for sale in Dominion Energy’s Consolidated Balance Sheets, were as follows: At December 31, 2023 East Ohio Transaction PSNC Transaction Questar Gas Transaction Other (millions) Current assets (1) $ 497 $ 336 $ 764 $ 1 Property, plant and equipment, net 5,443 2,806 4,369 26 Other deferred charges and other assets, (2) and intangible assets 2,659 834 766 — Current liabilities (3) 560 224 389 7 Long-term debt 2,286 948 1,205 — Other deferred credits and liabilities (4) 1,437 711 1,116 2 (1) Includes cash and cash equivalents of $ 4 million and regulatory assets of $ 75 million within the East Ohio Transaction, cash and cash equivalents of $ 2 million and regulatory assets of $ 89 million within the PSNC Transaction and cash and cash equivalents of $ 26 million and regulatory assets of $ 297 million within the Questar Gas Transaction at December 31, 2023. (2) I ncludes goodwill of $ 1.5 billion and regulatory assets of $ 781 million within the East Ohio Transaction, goodwill of $ 673 million and regulatory assets of $ 86 million within the PSNC Transaction and goodwill of $ 720 million and regulatory assets of $( 39 ) million within the Questar Gas Transaction at December 31, 2023. (3) Includes regulatory liabilities of $ 54 million within the East Ohio Transaction, $ 44 million within the PSNC Transaction and $ 55 million within the Questar Gas Transaction at December 31, 2023. (4) Includes regulatory liabilities of $ 711 million within the East Ohio Transaction, $ 435 million within the PSNC Transaction and $ 502 million within the Questar Gas Transaction at December 31, 2023.
Capital Expenditures and Significant Noncash Items Relating to the Disposal Groups	Capital expenditures and significant noncash items relating to the disposal groups included the following: Nine Months Ended September 30, 2024 Nine Months Ended September 30, 2023 East Ohio Transaction (1) PSNC Transaction (1) Questar Gas Transaction (1) Other East Ohio Transaction PSNC Transaction Questar Gas Transaction Other (millions) Capital expenditures $ 65 $ 287 $ 160 $ — $ 355 $ 153 $ 290 $ — Significant noncash items Depreciation, depletion — — — — 109 67 130 2 Accrued capital expenditures 53 22 33 — (1) Represents amounts attributable to Dominion Energy prior to the closing of the East Ohio Transaction which closed on March 6, 2024, the PSNC Transaction which closed on September 30, 2024 and the Questar Gas Transaction which closed on May 31, 2024, respectively.

Operating Revenue (Tables)

Operating Revenue (Tables)	9 Months Ended
Operating Revenue (Tables)	Sep. 30, 2024
Regulated and Unregulated Operating Revenue [Abstract]
Schedule of Operating Revenue	The Companies’ operating revenue consists of the following: Dominion Energy Virginia Power Quarter-to-Date Year-to-Date Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 2024 2023 2024 2023 (millions) Regulated electric sales: Residential $ 1,535 $ 1,558 $ 4,184 $ 3,968 $ 1,155 $ 1,133 $ 3,183 $ 2,975 Commercial 1,248 1,236 3,533 3,453 998 962 2,851 2,745 Industrial 216 227 642 658 113 109 330 324 Government and other retail 303 288 812 764 285 269 763 711 Wholesale 39 53 108 133 29 37 82 88 Nonregulated electric sales 239 229 693 611 30 22 69 55 Regulated gas sales: Residential 30 28 223 207 Commercial 24 25 100 106 Other 15 19 50 58 Regulated gas transportation and storage 6 4 15 13 Other regulated revenue 87 61 293 204 84 57 282 193 Other nonregulated revenues (1)(2)(3) 43 30 111 115 11 9 30 42 Total operating revenue from contracts with customers 3,785 3,758 10,764 10,290 2,705 2,598 7,590 7,133 Other revenues (1)(4) 156 52 295 569 57 47 198 148 Total operating revenue $ 3,941 $ 3,810 $ 11,059 $ 10,859 $ 2,762 $ 2,645 $ 7,788 $ 7,281 (1) See Note 19 for amounts attributable to affiliates. (2) Sales of renewable energy credits were $ 10 million and $ 7 million for the three months ended September 30, 2024 and 2023, respectively, and $ 22 million and $ 36 million for the nine months ended September 30, 2024 and 2023, respectively, at Dominion Energy and $ 4 million and $ 2 million for the three months ended September 30, 2024 and 2023, respectively, and $ 9 million and $ 24 million for the nine months ended September 30, 2024 and 2023, respectively, at Virginia Power. (3) Includes revenue from transition services agreements of $ 17 million and $ 3 million for the three months ended September 30, 2024 and 2023, respectively, and $ 34 million and $ 16 million for the nine months ended September 30, 2024 and 2023, respectively, at Dominion Energy. (4) Includes alternative revenue of $ 24 million and $ 34 million for the three months ended September 30, 2024 and 2023, respectively, and $ 85 million and $ 111 million for the nine months ended September 30, 2024 and 2023, respectively, at both Dominion Energy and Virginia Power. Neither Dominion Energy nor Virginia Power have any amounts for revenue to be recognized in the future on multi-year contracts in place at September 30, 2024 .

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
Income Taxes (Tables)	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Effective Income Tax	Dominion Energy Virginia Power Nine Months Ended September 30, 2024 2023 2024 2023 U.S. statutory rate 21.0 % 21.0 % 21.0 % 21.0 % Increases (reductions) resulting from: State taxes, net of federal benefit 3.3 3.9 4.4 4.6 Investment tax credits ( 1.2 ) ( 1.5 ) ( 0.8 ) ( 0.7 ) Production tax credits ( 2.8 ) ( 0.6 ) ( 3.0 ) ( 0.9 ) Reversal of excess deferred income taxes ( 2.4 ) ( 2.6 ) ( 1.8 ) ( 2.6 ) Changes in state deferred taxes associated — 1.3 — — AFUDC - equity ( 0.6 ) ( 0.1 ) ( 0.6 ) — Other, net ( 0.4 ) ( 0.8 ) 0.3 ( 0.3 ) Effective tax rate 16.9 % 20.6 % 19.5 % 21.1 %

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
Earnings Per Share (Tables)	Sep. 30, 2024
Earnings Per Share [Abstract]
Earnings Per Share Computation	The following table presents the calculation of Dominion Energy’s basic and diluted EPS: Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 (millions, except EPS) Net income attributable to Dominion Energy from $ 967 $ 698 $ 2,018 $ 1,813 Preferred stock dividends (see Note 16) ( 15 ) ( 20 ) ( 54 ) ( 60 ) Preferred stock deemed dividends (see Note 16) — — ( 9 ) — Net income attributable to Dominion Energy from 952 678 $ 1,955 $ 1,753 Net income (loss) attributable to Dominion Energy from $ ( 13 ) $ ( 541 ) $ 182 $ ( 92 ) Average shares of common stock outstanding - Basic 839.0 836.8 838.3 836.0 Net effect of dilutive securities (1) 0.3 — 0.1 0.2 Average shares of common stock outstanding - Diluted 839.3 836.8 838.4 836.2 EPS from continuing operations - Basic $ 1.14 $ 0.81 $ 2.33 $ 2.10 EPS from discontinued operations - Basic ( 0.02 ) ( 0.65 ) $ 0.22 ( 0.11 ) EPS attributable to Dominion Energy - Basic $ 1.12 $ 0.16 $ 2.55 $ 1.99 EPS from continuing operations - Diluted $ 1.14 $ 0.81 $ 2.33 $ 2.10 EPS from discontinued operations - Diluted ( 0.02 ) ( 0.65 ) $ 0.22 ( 0.11 ) EPS attributable to Dominion Energy - Diluted $ 1.12 $ 0.16 $ 2.55 $ 1.99 (1) Dilutive securities for the three and nine months ended September 30, 2024 consists of certain of the forward sales agreements entered into in the second and third quarters of 2024 (applying the treasury stock method). Dilutive securities for the nine months ended September 30, 2023 include stock potentially to be issued to satisfy the obligation under a settlement agreement with the SCDOR (applying the if converted method). See Notes 16 and 17 for additional information.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
Accumulated Other Comprehensive Income (Loss) (Tables)	Sep. 30, 2024
Schedule of Changes in AOCI Net of Tax and Reclassifications out of AOCI by Component	The following table presents Dominion Energy’s changes in AOCI (net of tax) and reclassifications out of AOCI by component: Total Derivative-Hedging Activities (1)(2) Investment (3) Pension (4) Equity Method Investees (5) Total (millions) Three Months Ended September 30, 2024 Beginning balance $ ( 191 ) $ ( 13 ) $ ( 1,483 ) $ — $ ( 1,687 ) Other comprehensive income (loss) before ( 7 ) 32 4 — 29 Amounts reclassified from AOCI: (gains) losses Interest and related charges 11 — — — 11 Other income (expense) — ( 2 ) ( 4 ) — ( 6 ) Total 11 ( 2 ) ( 4 ) — 5 Income tax expense (benefit) ( 3 ) 1 1 — ( 1 ) Total, net of tax 8 ( 1 ) ( 3 ) — 4 Net current period other comprehensive 1 31 1 — 33 Ending balance $ ( 190 ) $ 18 $ ( 1,482 ) $ — $ ( 1,654 ) Three Months Ended September 30, 2023 Beginning balance $ ( 236 ) $ ( 29 ) $ ( 1,299 ) $ ( 2 ) $ ( 1,566 ) Other comprehensive income (loss) before 19 ( 22 ) — ( 1 ) ( 4 ) Amounts reclassified from AOCI: (gains) losses Interest and related charges 11 — — — 11 Discontinued operations — — — 4 4 Other income (expense) — 2 ( 15 ) — ( 13 ) Total 11 2 ( 15 ) 4 2 Income tax expense (benefit) ( 3 ) — 7 ( 1 ) 3 Total, net of tax 8 2 ( 8 ) 3 5 Net current period other comprehensive 27 ( 20 ) ( 8 ) 2 1 Ending balance $ ( 209 ) $ ( 49 ) $ ( 1,307 ) $ — $ ( 1,565 ) (1) Comprised entirely of interest rate derivative hedging activities. (2) Net of $ 64 million, $ 64 million, $ 70 million and $ 79 million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. (3) Net of $( 5 ) million, $ 3 million, $ 16 million and $ 9 million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. (4) Net of $ 522 million, $ 522 million, $ 461 million and $ 453 million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. (5) Net of $ — million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. Total Derivative-Hedging Activities (1)(2) Investment (3) Pension (4) Equity Method Investees (5) Total (millions) Nine Months Ended September 30, 2024 Beginning balance $ ( 216 ) $ — $ ( 1,290 ) $ — $ ( 1,506 ) Other comprehensive income (loss) before 2 13 ( 249 ) — ( 234 ) Amounts reclassified from AOCI: (gains) losses Interest and related charges 33 — — — 33 Other income (expense) — 6 77 — 83 Total 33 6 77 — 116 Income tax expense (benefit) ( 9 ) ( 1 ) ( 20 ) — ( 30 ) Total, net of tax 24 5 57 — 86 Net current period other comprehensive 26 18 ( 192 ) — ( 148 ) Ending balance $ ( 190 ) $ 18 $ ( 1,482 ) $ — $ ( 1,654 ) Nine Months Ended September 30, 2023 Beginning balance $ ( 249 ) $ ( 44 ) $ ( 1,276 ) $ ( 3 ) $ ( 1,572 ) Other comprehensive income (loss) before 16 ( 6 ) — — 10 Amounts reclassified from AOCI: (gains) losses Interest and related charges 32 — — — 32 Discontinued operations — — — 4 4 Other income (expense) — 1 ( 46 ) — ( 45 ) Total 32 1 ( 46 ) 4 ( 9 ) Income tax expense (benefit) ( 8 ) — 15 ( 1 ) 6 Total, net of tax 24 1 ( 31 ) 3 ( 3 ) Net current period other comprehensive 40 ( 5 ) ( 31 ) 3 7 Ending balance $ ( 209 ) $ ( 49 ) $ ( 1,307 ) $ — $ ( 1,565 ) (1) Comprised entirely of interest rate derivative hedging activities. (2) Net of $ 64 million, $ 73 million, $ 70 million and $ 83 million tax at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively. (3) Net of $( 5 ) million, $( 2 ) million, $ 16 million and $ 13 million tax at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively. (4) Net of $ 522 million, $ 456 million, $ 461 million and $ 445 million tax at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively. (5) Net of $ — million tax at September 30, 2024, December 31, 2023, September 30, 2023 and $ 1 million tax at December 31, 2022, respectively.
Virginia Electric and Power Company
Schedule of Changes in AOCI Net of Tax and Reclassifications out of AOCI by Component	The following table presents Virginia Power’s changes in AOCI (net of tax) and reclassifications out of AOCI by component: Total Derivative-Hedging Activities (1)(2) Investment (3) Total (millions) Three Months Ended September 30, 2024 Beginning balance $ 24 $ ( 1 ) $ 23 Other comprehensive income (loss) before ( 7 ) 6 ( 1 ) Amounts reclassified from AOCI: (gains) losses Interest and related charges — — — Other income (expense) — — — Total — — — Income tax expense (benefit) — ( 1 ) ( 1 ) Total, net of tax — ( 1 ) ( 1 ) Net current period other comprehensive income (loss) ( 7 ) 5 ( 2 ) Ending balance $ 17 $ 4 $ 21 Three Months Ended September 30, 2023 Beginning balance $ 13 $ ( 4 ) $ 9 Other comprehensive income (loss) before 18 ( 3 ) 15 Amounts reclassified from AOCI: (gains) losses Interest and related charges (benefit) 1 — 1 Other income (expense) — — — Total 1 — 1 Income tax expense (benefit) ( 1 ) — ( 1 ) Total, net of tax — — — Net current period other comprehensive income (loss) 18 ( 3 ) 15 Ending balance $ 31 $ ( 7 ) $ 24 (1) Comprised entirely of interest rate derivative hedging activities. (2) Net of $( 6 ) million, $( 8 ) million, $( 11 ) million and $( 4 ) million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. (3) Net of $( 2 ) million, $ — million, $ 3 million and $ 1 million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. Total Derivative-Hedging Activities (1)(2) Investment (3) Total (millions) Nine Months Ended September 30, 2024 Beginning balance $ 15 $ 1 $ 16 Other comprehensive income (loss) before 2 2 4 Amounts reclassified from AOCI: (gains) losses Interest and related charges — — — Other income (expense) — 2 2 Total — 2 2 Income tax expense (benefit) — ( 1 ) ( 1 ) Total, net of tax — 1 1 Net current period other comprehensive income (loss) 2 3 5 Ending balance $ 17 $ 4 $ 21 Nine Months Ended September 30, 2023 Beginning balance $ 16 $ ( 7 ) $ 9 Other comprehensive income (loss) before 15 — 15 Amounts reclassified from AOCI: (gains) losses Interest and related charges 1 — 1 Other income (expense) — — — Total 1 — 1 Income tax expense (benefit) ( 1 ) — ( 1 ) Total, net of tax — — — Net current period other comprehensive income (loss) 15 — 15 Ending balance $ 31 $ ( 7 ) $ 24 (1) Comprised entirely of interest rate derivative hedging activities. (2) Net of $( 6 ) million, $( 5 ) million, $( 11 ) million and $( 5 ) million tax at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively. (3) Net of $( 2 ) million, $ — million, $ 3 million and $ 2 million tax at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
Fair Value Measurements (Tables)	Sep. 30, 2024
Fair Value Inputs, Assets, Quantitative Information	The following table presents the Companies’ quantitative information about Level 3 fair value measurements at September 30, 2024. The range and weighted average are presented in dollars for market price inputs and percentages for price volatility. Dominion Energy Virginia Power Valuation Unobservable Fair Value (millions) Range Weighted (1) Fair Value (millions) Range Weighted (1) Assets Physical and financial forwards: Natural gas (2) Discounted Market price (3) $ 8 ( 2 )- 4 ( 1 ) $ 8 ( 2 )- 3 ( 1 ) FTRs Discounted Market price (3) 72 ( 4 )- 11 4 72 ( 4 )- 11 4 Electricity Discounted Market price (3) 186 27 - 118 48 Physical options: Natural gas (2) Option model Market price (3) 16 1 - 5 3 13 1 - 5 3 Price volatility (4) 10 %- 71 % 46 % 14 %- 71 % 52 % Total assets $ 282 $ 93 Liabilities Physical and financial forwards: FTRs Discounted Market price (3) 1 ( 6 )- 7 1 1 ( 6 )- 7 1 Electricity Discounted Market price (3) 11 35 - 118 62 Physical options: Natural gas (2) Option model Market price (per Dth) (3) 1 1 - 3 2 1 1 - 3 2 Price volatility (4) 44 %- 54 % 50 % 44 %- 54 % 50 % Total liabilities $ 13 $ 2 (1) Averages weighted by volume. (2) Includes basis. (3) Represents market prices beyond defined terms for Levels 1 and 2. Represents volatilities unrepresented in published markets.
Fair Value, Option, Qualitative Disclosures	Sensitivity of the fair value measurements to changes in the significant unobservable inputs is as follows: Significant Unobservable Inputs Position Change to Input Impact on Fair Value Measurement Market price Buy Increase (decrease) Gain (loss) Market price Sell Increase (decrease) Loss (gain) Price volatility Buy Increase (decrease) Gain (loss) Price volatility Sell Increase (decrease) Loss (gain)
Fair Value, by Balance Sheet Grouping	The following table presents the Companies’ assets and liabilities that are measured at fair value on a recurring basis for each hierarchy level, including both current and noncurrent portions: Dominion Energy Virginia Power Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (millions) September 30, 2024 Assets Derivatives: Commodity $ — $ 168 $ 282 $ 450 $ — $ 53 $ 93 $ 146 Interest rate — 702 — 702 — 45 — 45 Foreign currency exchange rate — 8 — 8 — 8 — 8 Investments (1) : Equity securities: U.S. 5,473 — — 5,473 2,818 — — 2,818 Fixed income: Corporate debt instruments — 578 — 578 — 351 — 351 Government securities — 1,605 — 1,605 — 912 — 912 Other 141 — — 141 96 — — 96 Cash equivalents and other — 2 — 2 — 2 — 2 Total assets $ 5,614 $ 3,063 $ 282 $ 8,959 $ 2,914 $ 1,371 $ 93 $ 4,378 Liabilities Derivatives: Commodity $ — $ 96 $ 13 $ 109 $ — $ 58 $ 2 $ 60 Interest rate — 20 — 20 — — — — Foreign currency exchange rate — 52 — 52 — 52 — 52 Total liabilities $ — $ 168 $ 13 $ 181 $ — $ 110 $ 2 $ 112 December 31, 2023 Assets Derivatives: Commodity $ — $ 325 $ 225 $ 550 $ — $ 96 $ 21 $ 117 Interest rate — 800 — 800 — 181 — 181 Investments (1) : Equity securities: U.S. 4,527 — — 4,527 2,362 — — 2,362 Fixed income: Corporate debt instruments — 500 — 500 — 274 — 274 Government securities 219 1,238 — 1,457 129 687 — 816 Cash equivalents and other 31 — — 31 20 — — 20 Total assets $ 4,777 $ 2,863 $ 225 $ 7,865 $ 2,511 $ 1,238 $ 21 $ 3,770 Liabilities Derivatives: Commodity $ — $ 160 $ 139 $ 299 $ — $ 95 $ 137 $ 232 Interest rate — 359 — 359 — 45 — 45 Foreign currency exchange rate — 39 — 39 — 39 — 39 Total liabilities $ — $ 558 $ 139 $ 697 $ — $ 179 $ 137 $ 316 (1) Includes investments held in the nuclear decommissioning trusts and rabbi trusts. Excludes $ 211 million and $ 457 million of assets at Dominion Energy, inclusive of $ 77 million and $ 217 million at Virginia Power, at September 30, 2024 and December 31, 2023 , respectively, measured at fair value using NAV (or its equivalent) as a practical expedient which are not required to be categorized in the fair value hierarchy.
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation	The following table presents the net change in the Companies’ assets and liabilities measured at fair value on a recurring basis and included in the Level 3 fair value category: Dominion Energy Virginia Power Quarter-to-Date Year-to-Date Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 2024 2023 2024 2023 (millions) Beginning balance $ 360 $ 134 $ 86 $ 422 $ 105 $ ( 3 ) $ ( 116 ) $ 221 Total realized and unrealized gains (losses): Included in earnings: Operating revenue 13 ( 10 ) 7 ( 8 ) Electric fuel and other energy- purchases 14 ( 103 ) ( 134 ) ( 191 ) 10 ( 107 ) ( 136 ) ( 195 ) Discontinued operations ( 3 ) 1 ( 4 ) 1 Included in regulatory assets/ ( 77 ) ( 174 ) 230 ( 463 ) ( 7 ) ( 176 ) 219 ( 400 ) Settlements ( 40 ) 103 54 174 ( 17 ) 107 103 179 Purchases 2 — 30 16 — — 21 16 Ending balance $ 269 $ ( 49 ) $ 269 $ ( 49 ) $ 91 $ ( 179 ) $ 91 $ ( 179 )
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	For the Companies’ financial instruments that are not recorded at fair value, the carrying amounts and estimated fair values are as follows: Dominion Energy Virginia Power Carrying Estimated (1) Carrying Estimated (1) (millions) September 30, 2024 Long-term debt (2) $ 34,555 $ 33,818 $ 19,221 $ 18,571 Supplemental credit facility borrowings — — Securitization bonds (3) 1,282 1,315 1,282 1,315 Junior subordinated notes (2) 2,666 2,853 December 31, 2023 Long-term debt (2) $ 42,526 $ 40,539 $ 17,392 $ 16,418 Supplemental credit facility borrowings 450 450 Junior subordinated notes (2) 1,388 1,374 (1) Fair value is estimated using market prices, where available, and interest rates currently available for issuance of debt with similar terms and remaining maturities. All fair value measurements are classified as Level 2. The carrying amount of debt issuances with short-term maturities and variable rates refinanced at current market rates is a reasonable estimate of their fair value. (2) Carrying amount includes current portions included in securities due within one year and amounts which represent the unamortized debt issuance costs and discount or premium. There were no fair value hedges associated with fixed-rate debt at September 30, 2024 and December 31, 2023. Additionally, Dominion Energy carrying amounts include portions classified as current liabilities held for sale at December 31, 2023 . (3) Carrying amount includes current portions included in securities due within one year.

Derivatives and Hedge Account_2

Derivatives and Hedge Accounting Activities (Tables)	9 Months Ended
Derivatives and Hedge Accounting Activities (Tables)	Sep. 30, 2024
Offsetting Assets	The tables below present the Companies’ derivative asset and liability balances by type of financial instrument, if the gross amounts recognized in their Consolidated Balance Sheets were netted with derivative instruments and cash collateral received or paid: Dominion Energy Gross Amounts Not Offset in the Consolidated Balance Sheet Virginia Power Gross Amounts Not Offset in the Consolidated Balance Sheet Gross Assets (1) Financial Cash Net Gross Assets (1) Financial Cash Net (millions) September 30, 2024 Commodity contracts: Over-the-counter $ 185 $ 28 $ — $ 157 $ 132 $ 15 $ — $ 117 Exchange 104 46 — 58 3 2 — 1 Interest rate contracts: Over-the-counter 702 17 — 685 45 — — 45 Foreign currency exchange rate contracts: Over-the-counter 8 8 — — 8 8 — — Total derivatives, $ 999 $ 99 $ — $ 900 $ 188 $ 25 $ — $ 163 December 31, 2023 Commodity contracts: Over-the-counter $ 289 $ 26 $ — $ 263 $ 112 $ 13 $ — $ 99 Exchange 118 33 15 70 4 3 — 1 Interest rate contracts: Over-the-counter 800 191 — 609 181 11 — 170 Total derivatives, $ 1,207 $ 250 $ 15 $ 942 $ 297 $ 27 $ — $ 270 (1) Excludes derivative assets of $ 161 million and $ 143 million at Dominion Energy and $ 11 million and $ 1 million at Virginia Power at September 30, 2024 and December 31, 2023 , respectively, which are not subject to master netting or other similar arrangements.
Offsetting Liabilities	Dominion Energy Gross Amounts Not Offset in the Consolidated Balance Sheet Virginia Power Gross Amounts Not Offset in the Consolidated Balance Sheet Gross Liabilities (1) Financial Cash Net Gross Liabilities (1) Financial Cash Net (millions) September 30, 2024 Commodity contracts: Over-the-counter $ 59 $ 28 $ — $ 31 $ 21 $ 15 $ — $ 6 Exchange 46 46 — — 2 2 — — Interest rate contracts: Over-the-counter 20 17 — 3 — — — — Foreign currency exchange rate contracts: Over-the-counter 52 8 — 44 52 8 — 44 Total derivatives, $ 177 $ 99 $ — $ 78 $ 75 $ 25 $ — $ 50 December 31, 2023 Commodity contracts: Over-the-counter $ 266 $ 26 $ 30 $ 210 $ 153 $ 13 $ 30 $ 110 Exchange 33 33 — — 3 3 — — Interest rate contracts: Over-the-counter 359 186 — 173 45 6 — 39 Foreign currency exchange rate contracts: Over-the-counter 39 5 — 34 39 5 — 34 Total derivatives, $ 697 $ 250 $ 30 $ 417 $ 240 $ 27 $ 30 $ 183 (1) Excludes derivative liabilities of $ 4 million at Dominion Energy at September 30, 2024 and $ 37 million and $ 76 million at Virginia Power at September 30, 2024 and December 31, 2023 , respectively, which are not subject to master netting or similar arrangements. Dominion Energy did no t have any derivative liabilities at December 31, 2023 which were not subject to master netting or similar arrangements. Volumes The following table presents the volume of the Companies’ derivative activity at September 30, 2024. These volumes are based on open derivative positions and represent the combined absolute value of their long and short positions, except in the case of offsetting transactions, for which they represent the absolute value of the net volume of its long and short positions. Dominion Energy Virginia Power Current Noncurrent Current Noncurrent Natural Gas (bcf): Fixed price (1) 39 24 38 24 Basis (2) 167 328 157 328 Electricity (MWh in millions): Fixed price 18 33 9 2 FTRs 72 72 Interest rate (3) (in millions) $ 2,662 $ 7,612 $ — $ 1,050 Foreign currency exchange rate (3) (in millions) Danish Krone 1,829 kr. 1,512 kr. 1,829 kr. 1,512 kr. Euro € 592 € 921 € 592 € 921 (1) Includes options at Dominion Energy. (2) Includes options. (3) Maturity is determined based on final settlement period.
Schedule of Volume of Derivative Activity	The following table presents the volume of the Companies’ derivative activity at September 30, 2024. These volumes are based on open derivative positions and represent the combined absolute value of their long and short positions, except in the case of offsetting transactions, for which they represent the absolute value of the net volume of its long and short positions. Dominion Energy Virginia Power Current Noncurrent Current Noncurrent Natural Gas (bcf): Fixed price (1) 39 24 38 24 Basis (2) 167 328 157 328 Electricity (MWh in millions): Fixed price 18 33 9 2 FTRs 72 72 Interest rate (3) (in millions) $ 2,662 $ 7,612 $ — $ 1,050 Foreign currency exchange rate (3) (in millions) Danish Krone 1,829 kr. 1,512 kr. 1,829 kr. 1,512 kr. Euro € 592 € 921 € 592 € 921 (1) Includes options at Dominion Energy. (2) Includes options. (3) Maturity is determined based on final settlement period.
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)	The following table presents selected information related to gains (losses) on cash flow hedges included in AOCI in the Companies’ Consolidated Balance Sheets at September 30, 2024: Dominion Energy Virginia Power AOCI After-Tax Amounts Expected to be Maximum Term AOCI After-Tax Amounts Expected to be Maximum Term (millions) Interest rate $ ( 190 ) $ ( 30 ) 375 months $ 17 $ 1 375 months Total $ ( 190 ) $ ( 30 ) $ 17 $ 1
Fair Value of Derivatives	Fair Value and Gains and Losses on Derivative Instruments The following table presents the fair values of the Companies’ derivatives and where they are presented in their Consolidated Balance Sheets: Dominion Energy Virginia Power Fair Value – Fair Value – Total Fair Fair Value – Fair Value – Total Fair (millions) At September 30, 2024 ASSETS Current Assets Commodity $ — $ 235 $ 235 $ — $ 130 $ 130 Interest rate — 305 305 — — — Foreign currency — 5 5 — 5 5 Total current derivative assets — 545 545 — 135 135 Noncurrent Assets Commodity — 215 215 — 16 16 Interest rate 45 352 397 45 — 45 Foreign currency — 3 3 — 3 3 Total noncurrent derivative assets (1) 45 570 615 45 19 64 Total derivative assets $ 45 $ 1,115 $ 1,160 $ 45 $ 154 $ 199 LIABILITIES Current Liabilities Commodity $ — $ 81 $ 81 $ — $ 54 $ 54 Interest rate — — — — — — Foreign currency exchange rate — 26 26 — 26 26 Total current derivative liabilities — 107 107 — 80 80 Noncurrent Liabilities Commodity — 28 28 — 6 6 Interest rate — 20 20 — — — Foreign currency exchange rate — 26 26 — 26 26 Total noncurrent derivative liabilities (2) — 74 74 — 32 32 Total derivative liabilities $ — $ 181 $ 181 $ — $ 112 $ 112 At December 31, 2023 ASSETS Current Assets Commodity $ — $ 312 $ 312 $ — $ 91 $ 91 Interest rate 143 298 441 143 — 143 Total current derivative assets (3) 143 610 753 143 91 234 Noncurrent Assets Commodity — 238 238 — 26 26 Interest rate 38 321 359 38 — 38 Total noncurrent derivative assets (1) 38 559 597 38 26 64 Total derivative assets $ 181 $ 1,169 $ 1,350 $ 181 $ 117 $ 298 LIABILITIES Current Liabilities Commodity $ — $ 244 $ 244 $ — $ 188 $ 188 Interest rate 45 76 121 45 — 45 Foreign currency exchange rate — 11 11 — 11 11 Total current derivative liabilities (4) 45 331 376 45 199 244 Noncurrent Liabilities Commodity — 55 55 — 44 44 Interest rate — 238 238 — — — Foreign currency exchange rate — 28 28 — 28 28 Total noncurrent derivative liabilities (2) — 321 321 — 72 72 Total derivative liabilities $ 45 $ 652 $ 697 $ 45 $ 271 $ 316 (1) Noncurrent derivative assets are presented in other deferred charges and other assets in the Companies’ Consolidated Balance Sheets. (2) Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in the Companies’ Consolidated Balance Sheets. (3) Includes $ 54 million recorded in current assets held for sale in Dominion Energy’s Consolidated Balance Sheets at December 31, 2023. Includes $ 30 million recorded in current liabilities held for sale in Dominion Energy’s Consolidated Balance Sheets at December 31, 2023.
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location	The following tables present the gains and losses on the Companies’ derivatives, as well as where the associated activity is presented in their Consolidated Balance Sheets and Statements of Income. Dominion Energy Virginia Power Derivatives in cash flow Amount of Gain (1) Amount of Gain Increase (Decrease) (2) Amount of Gain (1) Amount of Gain Increase (Decrease) (2) (millions) Three Months Ended September 30, 2024 Derivative type and location of gains (losses): Interest rate (3) $ ( 10 ) $ ( 11 ) $ ( 110 ) $ ( 10 ) $ — $ ( 109 ) Total $ ( 10 ) $ ( 11 ) $ ( 110 ) $ ( 10 ) $ — $ ( 109 ) Three Months Ended September 30, 2023 Derivative type and location of gains (losses): Interest rate (3) $ 25 ( 11 ) $ 268 $ 25 $ ( 1 ) $ 267 Total $ 25 $ ( 11 ) $ 268 $ 25 $ ( 1 ) $ 267 Nine Months Ended September 30, 2024 Derivative type and location of gains (losses): Interest rate (3) $ 2 $ ( 33 ) $ 20 $ 2 $ — $ 20 Total $ 2 $ ( 33 ) $ 20 $ 2 $ — $ 20 Nine Months Ended September 30, 2023 Derivative type and location of gains (losses): Interest rate (3) $ 21 $ ( 32 ) $ 236 $ 21 $ ( 1 ) $ 235 Total $ 21 $ ( 32 ) $ 236 $ 21 $ ( 1 ) $ 235 (1) Amounts deferred into AOCI have no associated effect in the Companies’ Consolidated Statements of Income. (2) Represents net derivative activity deferred into and amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in the Companies’ Consolidated Statements of Income. (3) Amounts recorded in the Companies’ Consolidated Statements of Income are classified in interest and related charges.
Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance	Amount of Gain (Loss) Recognized in Income on Derivatives (1)(2) Derivatives not designated as hedging instruments Dominion Energy Virginia Power Quarter-to-Date Year-to-Date Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 2024 2023 2024 2023 (millions) Derivative type and location of gains (losses): Commodity: Operating revenue $ 123 $ 7 $ 184 $ 428 $ 31 $ 6 $ 107 $ 25 Electric fuel and other energy-related 2 ( 149 ) ( 188 ) ( 267 ) ( 1 ) ( 151 ) ( 188 ) ( 270 ) Operations and maintenance — — — 2 — — — 2 Discontinued operations ( 3 ) — ( 28 ) 94 Interest rate: Interest and related charges 77 274 ( 14 ) 227 Discontinued operations — ( 7 ) — 17 Total $ 199 $ 125 $ ( 46 ) $ 501 $ 30 $ ( 145 ) $ ( 81 ) $ ( 243 ) (1) Includes derivative activity amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in the Companies’ Consolidated Statements of Income. Excludes amounts related to foreign currency exchange rate derivatives that are deferred to plant under construction within property, plant and equipment and regulatory assets/liabilities that will begin to amortize once the CVOW Commercial Project is placed in service.

Investments (Tables)

Investments (Tables)	9 Months Ended
Investments (Tables)	Sep. 30, 2024
Equity and Debt Securities and Cash Equivalents and Cost Method Investments in Decommissioning Trust Funds	The Companies’ decommissioning trust funds are summarized below: Dominion Energy Virginia Power Amortized Total Total Allowance for Credit Losses Fair Amortized Total Total Allowance for Credit Losses Fair (millions) September 30, 2024 Equity securities: (1) U.S. $ 1,267 $ 4,181 $ ( 2 ) $ 5,446 $ 728 $ 2,168 $ ( 2 ) $ 2,894 Fixed income securities: (2) Corporate debt 569 17 ( 17 ) $ — 569 357 8 ( 14 ) $ — 351 Government 1,549 42 ( 15 ) — 1,576 894 25 ( 7 ) — 912 Common/ — — — — — — — — — — Other 131 — — — 131 96 — — — 96 Insurance 252 — — 252 Cash equivalents (3) 43 — — — 43 13 — — — 13 Total $ 3,811 $ 4,240 $ ( 34 ) (4) $ — $ 8,017 $ 2,088 $ 2,201 $ ( 23 ) (4) $ — $ 4,266 December 31, 2023 Equity securities: (1) U.S. $ 1,276 $ 3,270 $ ( 10 ) $ 4,536 $ 759 $ 1,706 $ ( 10 ) $ 2,455 Fixed income securities: (2) Corporate debt 508 10 ( 27 ) $ — 491 292 3 ( 21 ) $ — 274 Government 1,426 28 ( 24 ) — 1,430 811 17 ( 12 ) — 816 Common/ 161 — — — 161 124 — — — 124 Insurance 244 — — 244 Cash equivalents (3) 84 — — — 84 47 — — — 47 Total $ 3,699 $ 3,308 $ ( 61 ) (4) $ — $ 6,946 $ 2,033 $ 1,726 $ ( 43 ) (4) $ — $ 3,716 (1) Unrealized gains and losses on equity securities are included in other income (expense) and the nuclear decommissioning trust regulatory liability. (2) Unrealized gains and losses on fixed income securities are included in AOCI and the nuclear decommissioning trust regulatory liability. Changes in allowance for credit losses are included in other income (expense). (3) Dominion Energy includes pending sales of securities of $ 21 million and $ 49 million at September 30, 2024 and December 31, 2023 , respectively. Virginia Power includes pending sales of securities of $ 11 million and $ 27 million at September 30, 2024, and December 31, 2023 , respectively. (4) Dominion Energy’s fair value of securities in an unrealized loss position was $ 474 million and $ 764 million at September 30, 2024 and December 31, 2023 , respectively. Virginia Power’s fair value of securities in an unrealized loss position was $ 262 million and $ 384 million at September 30, 2024 and December 31, 2023 , respectively.
Unrealized Gain Loss on Equity	The portion of unrealized gains and losses that relates to equity securities held within Dominion Energy and Virginia Power’s nuclear decommissioning trusts is summarized below: Dominion Energy Virginia Power Quarter-to-Date Year-to-Date Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 2024 2023 2024 2023 (millions) Net gains (losses) recognized during $ 282 $ ( 150 ) $ 919 $ 370 $ 145 $ ( 80 ) $ 473 $ 189 Less: Net (gains) losses recognized 5 1 1 4 3 ( 1 ) ( 2 ) 2 Unrealized gains (losses) recognized (1) $ 287 $ ( 149 ) $ 920 $ 374 $ 148 $ ( 81 ) $ 471 $ 191 (1) Included in other income (expense) and the nuclear decommissioning trust regulatory liability.
Investments Classified by Contractual Maturity Date	The fair value of Dominion Energy and Virginia Power’s fixed income securities with readily determinable fair values held in nuclear decommissioning trust funds at September 30, 2024 by contractual maturity is as follows: Dominion Energy Virginia Power (millions) Due in one year or less $ 27 $ 18 Due after one year through five years 572 299 Due after five years through ten years 459 273 Due after ten years 1,218 769 Total $ 2,276 $ 1,359
Marketable Securities	Presented below is selected information regarding Dominion Energy and Virginia Power’s equity and fixed income securities with readily determinable fair values held in nuclear decommissioning trust funds. Dominion Energy Virginia Power Quarter-to-Date Year-to-Date Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 2024 2023 2024 2023 (millions) Proceeds from sales $ 651 $ 869 $ 2,230 $ 2,007 $ 297 $ 535 $ 1,370 $ 1,254 Realized gains (1) 18 5 77 48 13 4 52 29 Realized losses (1) 21 33 93 110 16 16 61 61 (1) Includes realized gains and losses recorded to the nuclear decommissioning trust regulatory liability.

Regulatory Assets and Liabili_2

Regulatory Assets and Liabilities (Tables)	9 Months Ended
Regulatory Assets and Liabilities (Tables)	Sep. 30, 2024
Schedule of Regulatory Assets and Liabilities	Regulatory assets and liabilities include the following: Dominion Energy Virginia Power September 30, December 31, September 30, December 31, (millions) Regulatory assets: Deferred cost of fuel used in electric generation (1) $ 35 $ 245 $ 10 $ 95 Securitized cost of fuel used in electric generation (2) 119 — 119 — Deferred rider costs for Virginia electric utility (3) 328 270 328 270 Ash pond and landfill closure costs (4) 111 200 111 200 Deferred nuclear refueling outage costs (5) 67 63 67 63 NND Project costs (6) 138 138 Derivatives (7) 31 162 29 160 Other 201 231 87 80 Regulatory assets-current 1,030 1,309 751 868 Unrecognized pension and other postretirement benefit costs (8) 486 1,036 — — Deferred rider costs for Virginia electric utility (3) 680 496 680 496 Interest rate hedges (9) 167 168 — — AROs and related funding (10) 392 379 NND Project costs (6) 1,845 1,949 CCR remediation, ash pond and landfill closure costs (4) 2,965 2,410 2,645 2,407 Deferred cost of fuel used in electric generation (1) — 1,221 — 1,221 Securitized cost of fuel used in electric generation (2) 1,081 — 1,081 — Derivatives (7) 80 107 41 66 Other 656 590 114 127 Regulatory assets-noncurrent 8,352 8,356 4,561 4,317 Total regulatory assets $ 9,382 $ 9,665 $ 5,312 $ 5,185 Regulatory liabilities: Deferred cost of fuel used in electric generation (1) 166 — 166 — Provision for future cost of removal and AROs (11) 118 118 118 118 Reserve for refunds and rate credits to electric utility customers (12) 77 83 — — Income taxes refundable through future rates (13) 107 107 70 70 Monetization of guarantee settlement (14) 67 67 Derivatives (7) 77 7 60 — Other 102 140 102 133 Regulatory liabilities-current 714 522 516 321 Income taxes refundable through future rates (13) 2,980 3,076 2,170 2,237 Provision for future cost of removal and AROs (11) 1,842 1,818 1,207 1,185 Nuclear decommissioning trust (15) 2,537 2,098 2,537 2,098 Monetization of guarantee settlement (14) 585 635 Interest rate hedges (9) 240 233 240 233 Reserve for refunds and rate credits to electric utility customers (12) 181 237 — — Overrecovered other postretirement benefit costs (16) 176 155 Derivatives (7) 151 136 5 — Other 303 286 236 225 Regulatory liabilities-noncurrent 8,995 8,674 6,395 5,978 Total regulatory liabilities $ 9,709 $ 9,196 $ 6,911 $ 6,299 (1) Reflects deferred fuel expenses for the Virginia and North Carolina jurisdictions of Virginia Power’s electric generation operations. Additionally, Dominion Energy includes deferred fuel expenses for the South Carolina jurisdiction of its electric generation operations. In February 2024, Virginia Power completed a securitization of $ 1.3 billion of under-recovered fuel costs for its Virginia service territory. (2) Reflects under-recovered fuel costs for Virginia Power’s Virginia service territory securitized through the issuance of bonds by VPFS in February 2024. See Note 15 in this report and Notes 13 and 18 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023 for additional information. (3) Reflects deferrals under Virginia Power’s electric transmission FERC formula rate and the deferral of costs associated with certain current and prospective rider projects. (4) Primarily reflects legislation in Virginia which requires any CCR asset located at certain Virginia Power stations to be closed by removing the CCR to an approved landfill or through beneficial reuse. These deferred costs are expected to be collected over a period between 15 and 18 years commencing December 2021 through Rider CCR. Virginia Power is entitled to collect carrying costs on uncollected expenditures once expenditures have been made. In addition, the balance at September 30, 2024 reflects amounts related to the EPA’s May 2024 final rule concerning CCR as discussed in Note 2. (5) Legislation in Virginia requires Virginia Power to defer operation and maintenance costs incurred in connection with the refueling of any nuclear-powered generating plant. These deferred costs will be amortized over the refueling cycle, not to exceed 18 months. (6) Reflects expenditures by DESC associated with the NND Project, which pursuant to the SCANA Merger Approval Order, will be recovered from DESC electric service customers over a 20 -year period ending in 2039. (7) Represents changes in the fair value of derivatives, excluding separately presented interest rate hedges, that following settlement are expected to be recovered from or refunded to customers. (8) Represents unrecognized pension and other postretirement employee benefit costs expected to be recovered or refunded through future rates generally over the expected remaining service period of plan participants by certain of Dominion Energy’s rate-regulated subsidiaries. Includes regulatory assets of $ 215 million and regulatory liabilities of $ 12 million at December 31, 2023 related to retained pension and other postretirement benefit plan assets and obligations for the East Ohio, Questar Gas and PSNC Transactions reclassified to AOCI upon closing of each transaction. (9) Reflects interest rate hedges recoverable from or refundable to customers. Certain of these instruments are settled and any related payments are being amortized into interest expense over the life of the related debt, which has a weighted-average useful life of approximately 25 years and 24 years for Dominion Energy and Virginia Power, respectively, as of September 30, 2024 . (10) Represents uncollected costs, including deferred depreciation and accretion expense, related to legal obligations associated with the future retirement of generation, transmission and distribution properties. The AROs primarily relate to DESC’s electric generating facilities, including Summer, and are expected to be recovered over the related property lives and periods of decommissioning which may range up to approximately 105 years . (11) Rates charged to customers by Dominion Energy and Virginia Power’s regulated businesses include a provision for the cost of future activities to remove assets that are expected to be incurred at the time of retirement. (12) Reflects amounts previously collected from retail electric customers of DESC for the NND Project to be credited over an estimated 11 -year period effective February 2019, in connection with the SCANA Merger Approval Order. Also reflects amounts to be refunded to jurisdictional retail electric customers in Virginia associated with the settlement of the 2021 Triennial Review. See Note 13 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023 for additional information. (13) Amounts recorded to pass the effect of reduced income taxes from the 2017 Tax Reform Act to customers in future periods, which will primarily reverse at the weighted average tax rate that was used to build the reserves over the remaining book life of the property, net of amounts to be recovered through future rates to pay income taxes that become payable when rate revenue is provided to recover AFUDC equity. (14) Reflects amounts to be refunded to DESC electric service customers over a 20 -year period ending in 2039 associated with the monetization of a bankruptcy settlement agreement. (15) Primarily reflects a regulatory liability representing amounts collected from Virginia jurisdictional customers and placed in external trusts (including income, losses and changes in fair value thereon, as applicable) for the future decommissioning of Virginia Power’s utility nuclear generation stations, in excess of the related AROs. (16) Reflects a regulatory liability for the collection of postretirement benefit costs allowed in rates in excess of expense incurred.

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
Regulatory Matters (Tables)	Sep. 30, 2024
Public Utilities General Disclosures [Line Items]
Summary of Significant Virginia Power Electric Transmission Projects Applied	Description and Location Application Date Approval Date Type of Miles of Cost Estimate (1) Construct new Germanna substation, transmission November 2023 August 2024 230 kV 2 $ 55 Construct Daves Store transmission line extension February 2024 October 2024 230 kV 3 70 Construct new Aspen and Golden substations, March 2024 Pending 500- 10 690 Partial rebuild Fredericksburg-Aquia Harbour March 2024 Pending 230- 24 135 Construct new Apollo-Twin Creeks transmission March 2024 Pending 230 kV 2 285 Rebuild Dooms-Harrisonburg transmission lines April 2024 Pending 230 kV 22 60 Rebuild and construct new Fentress-Yadkin June 2024 Pending 500 kV 14 205 Partial rebuild, reconductor and construct new July 2024 Pending 230 kV 6 170 Rebuild Aquia Harbour-Possum Point transmission August 2024 Pending 500- 32 210 Partial rebuild, reconductor and construct new August 2024 Pending 230 kV 38 120 Construct new Centreport transmission line, September 2024 Pending 230 kV 3 55 Partial rebuild and construct new Meadowville October 2024 Pending 230 kV 11 190 (1) Represents the cost estimate included in the application except as updated in the approval if applicable. In addition, Virginia Power had various other transmission projects approved or applied for and currently pending approval with aggregate cost estimates of approximately $ 145 million and $ 55 million, respectively.
Virginia Electric and Power Company
Public Utilities General Disclosures [Line Items]
Significant Riders Associated With Virginia Power Projects	Rider Name Application Date Approval Date Rate Year Total Revenue (1) Increase (Decrease) Rider CCR March 2024 Pending December 2024 $ 103 $ ( 91 ) Rider CE (2) October 2023 March 2024 May 2024 133 44 Rider CE (3) October 2024 Pending May 2025 182 49 Rider DIST (4) August 2024 Pending June 2025 269 N/A Rider E January 2024 September 2024 November 2024 72 ( 37 ) Rider GEN (5) June 2024 Pending April 2025 438 N/A Rider GEN June 2024 Pending April 2026 311 ( 127 ) Rider GT August 2023 May 2024 June 2024 145 131 Rider OSW November 2023 July 2024 September 2024 486 215 Rider OSW (6) November 2024 Pending September 2025 640 154 Rider RPS December 2023 (11) August 2024 September 2024 358 262 Rider SNA October 2023 July 2024 September 2024 69 19 Rider SNA (7) October 2024 Pending September 2025 207 138 Rider T1 (8) May 2024 July 2024 September 2024 1,170 291 Rider U (9) October 2023 July 2024 August 2024 150 76 DSM Riders (10) December 2023 July 2024 September 2024 86 ( 21 ) (1) In addition, Virginia Power has a rider associated with another project with a total annual revenue requirement of $ 18 million as of September 30, 2024. There is a pending application associated with this rider, which if approved, would result in a net annual revenue requirement increase of $ 7 million. (2) The Virginia Commission approved four solar generation projects and 13 power purchase agreements in addition to previously approved Rider CE projects. In addition, the approved total revenue requirement includes amounts which had previously been collected under a separate rider. (3) Associated with two solar generation projects, two small-scale solar projects and 24 purchased power agreements in addition to previously approved Rider CE projects. (4) Consists of $ 103 million in total revenue requirement for certain previously approved electric distribution grid transformation projects and $ 166 million for previously approved phases and proposed phase eight of certain new underground distribution facilities. If approved, would result in the consolidation of Riders GT and U and cease the separate collection of rates under these riders effective June 1, 2025. (5) Includes $ 348 million in total revenue requirement related to the consolidation of Riders BW, GV and four other riders associated with generation facilities, ceasing the separate collection of rates under these riders effective April 1, 2025 and the extension of existing rates for Rider BW through March 2025. In addition, Virginia Power also requests approval to recover costs associated with the Virginia LNG Storage Facility described above. (6) Includes a proposal for Virginia Power to establish a decommissioning trust fund associated with the CVOW Commercial Project. If approved, the applicable amount included within the total revenue requirement would be allocated for such purposes. (7) Virginia Power also requested approval of cost recovery of approximately $ 1.7 billion through Rider SNA for the second phase of nuclear life extension program which includes investments for calendar years 2025 through 2027. (8) Consists of $ 532 million for the transmission component of Virginia Power’s base rates and $ 638 million for Rider T1. (9) Consists of $ 72 million for previously approved phases and $ 78 million for phase seven costs for Rider U. In addition, the Virginia Commission approved Virginia Power’s request to extend existing rates for Rider U through July 2024. (10) Associated with an additional three new energy efficiency programs and one new demand response program with a $ 102 million cost cap, with the ability to exceed the cost cap by no more than 15 %. (11) Virginia Power amended its application in February 2024.

Significant Financing Transac_2

Significant Financing Transactions (Tables)	9 Months Ended
Significant Financing Transactions (Tables)	Sep. 30, 2024
Debt Instrument [Line Items]
Schedule of Line of Credit Facilities	At September 30, 2024, Dominion Energy’s commercial paper and letters of credit outstanding, as well as its capacity available under the credit facility, were as follows: Facility Outstanding Outstanding Facility (millions) Joint revolving credit facility (1)(2) $ 6,000 $ 3,622 $ 21 $ 2,357 (1) This credit facility matures in June 2026, with the potential to be extended by the borrowers to June 2028, and can be used by the borrowers under the credit facility to support bank borrowings and the issuance of commercial paper, as well as to support up to a combined $ 2.0 billion of letters of credit . (2) In May 2024, the joint revolving credit facility was amended to remove Questar Gas as a co-borrower .
Virginia Electric and Power Company
Debt Instrument [Line Items]
Schedule of Line of Credit Facilities	At September 30, 2024, Virginia Power’s share of commercial paper and letters of credit outstanding under the joint revolving credit facility with Dominion Energy and DESC was as follows: Facility (1) Outstanding Outstanding (millions) Joint revolving credit facility (1)(2) $ 6,000 $ 740 $ 10 (1) The full amount of the facility is available to Virginia Power, less any amounts outstanding to co-borrowers Dominion Energy and DESC. The sub-limit for Virginia Power is set pursuant to the terms of the facility but can be changed at the option of the borrowers multiple times per year. At September 30, 2024 , the sub-limit for Virginia Power was $ 1.75 billion. If Virginia Power has liquidity needs in excess of its sub-limit, the sub-limit may be changed or such needs may be satisfied through short-term intercompany borrowings from Dominion Energy. This credit facility matures in June 2026, with the potential to be extended by the borrowers to June 2028. The credit facility can be used to support bank borrowings and the issuance of commercial paper, as well as to support up to $ 2.0 billion (or the sub-limit, whichever is less) of letters of credit. (2) In May 2024, the joint revolving credit facility was amended to remove Questar Gas as a co-borrower.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
Commitments and Contingencies (Tables)	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Schedule of Subsidiary Guarantees	At September 30, 2024, Dominion Energy had issued the following subsidiary guarantees: Maximum (millions) Commodity transactions (1) $ 2,765 Nuclear obligations (2) 220 Solar (3) 207 Other (4) 849 Total (5)(6) $ 4,041 (1) Guarantees related to commodity commitments of certain subsidiaries. These guarantees were provided to counterparties in order to facilitate physical and financial transaction related commodities and services. (2) Guarantees primarily related to certain DGI subsidiaries regarding all aspects of running a nuclear facility. (3) Includes guarantees to facilitate the development of solar projects. (4) Guarantees related to other miscellaneous contractual obligations such as leases, environmental obligations, construction projects and insurance programs. Due to the uncertainty of workers’ compensation claims, the parental guarantee has no stated limit. (5) Excludes Dominion Energy’s guarantee of an offshore wind installation vessel discussed in Note 15 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. (6) In July 2016, Dominion Energy signed an agreement (subsequently amended most recently in December 2023) with a lessor to construct and lease a new corporate office property in Richmond, Virginia and commenced the five-year lease term in August 2019 , with certain options at the end of the initial lease term as discussed in Note 23 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. In July 2024, the agreement was amended to reflect Dominion Energy’s election to extend the lease term through July 2029 . At the end of the lease term, Dominion Energy can (i) extend the term of the lease for at least one year , subject to the approval of the participants, at current market terms, (ii) purchase the property for an amount equal to the project costs or, (iii) subject to certain terms and conditions, sell the property on behalf of the lessor to a third party using commercially reasonable efforts to obtain the highest cash purchase price for the property. If the project is sold and the proceeds from the sale are insufficient to repay the investors for the project costs, Dominion Energy may be required to make a payment to the lessor equal to the recorded lease balance.

Related-Party Transactions (Tab

Related-Party Transactions (Tables)	9 Months Ended
Related-Party Transactions (Tables)	Sep. 30, 2024
Virginia Electric and Power Company
Schedule of Related Party Transactions	Presented below are Virginia Power’s significant transactions with DES and other affiliates: Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 (millions) Commodity purchases from affiliates $ 147 $ 146 $ 453 $ 463 Services provided by affiliates (1) 169 149 495 441 Services provided to affiliates 4 7 12 15 (1) Includes capitalized expenditures of $ 59 million and $ 51 million for the three months ended September 30, 2024 and 2023 , respectively and $ 170 million and $ 151 million for the nine months ended September 30, 2024 and 2023 , respectively.

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
Employee Benefit Plans (Tables)	Sep. 30, 2024
Retirement Benefits [Abstract]
Components of Provision for Net Periodic Benefit Cost (Credit)	The components of Dominion Energy’s provision for net periodic benefit cost (credit) are as follows: Pension Benefits Other Postretirement Benefits Quarter-to-Date Year-to-Date Quarter-to-Date Year-to-Date Period Ended September 30, 2024 2023 2024 2023 2024 2023 2024 2023 (millions) Service cost $ 19 $ 24 $ 63 $ 72 $ 2 $ 3 $ 8 $ 10 Interest cost 107 111 324 332 15 15 43 46 Expected return on plan assets ( 200 ) ( 216 ) ( 611 ) ( 648 ) ( 43 ) ( 37 ) ( 128 ) ( 113 ) Amortization of prior service 1 — 1 — ( 9 ) ( 10 ) ( 27 ) ( 28 ) Amortization of net actuarial 3 — 16 — ( 1 ) ( 1 ) ( 5 ) ( 4 ) Settlements and curtailments (1) — — 4 — ( 1 ) — ( 1 ) — Plan amendment — — 22 — — — — — Net periodic benefit (credit) cost $ ( 70 ) $ ( 81 ) $ ( 181 ) $ ( 244 ) $ ( 37 ) $ ( 30 ) $ ( 110 ) $ ( 89 ) (1) 2024 amount relates to Dominion Energy nonqualified pension plan.

Operating Segments (Tables)

Operating Segments (Tables)	9 Months Ended
Operating Segments (Tables)	Sep. 30, 2024
Segment Reporting Information [Line Items]
Schedule of Primary Operating Segments	The Companies are organized primarily on the basis of products and services sold in the U.S. A description of the operations included in the Companies’ primary operating segments is as follows: Primary Operating Segment Description of Operations Dominion Virginia Dominion Energy Virginia Regulated electric distribution X X Regulated electric transmission X X Regulated electric generation fleet (1) X X Dominion Energy South Carolina Regulated electric distribution X Regulated electric transmission X Regulated electric generation fleet X Regulated gas distribution and storage X Contracted Energy (2) Nonregulated electric generation fleet X (1) Includes Virginia Power’s non-jurisdictional solar generation operations. (2) Includes renewable natural gas operations.
Schedule of Segment Reporting Information, by Segment	The following table presents segment information pertaining to Dominion Energy’s operations: Dominion Dominion Contracted Corporate Adjustments Consolidated (millions) Three Months Ended September 30, 2024 Total revenue from external $ 2,760 $ 846 $ 256 $ 79 $ — $ 3,941 Intersegment revenue 2 2 4 252 ( 260 ) — Total operating revenue 2,762 848 260 331 ( 260 ) 3,941 Net loss from discontinued — — — ( 13 ) — ( 13 ) Net income attributable to 662 147 83 62 — 954 Three Months Ended September 30, 2023 Total revenue from external $ 2,649 $ 944 $ 225 $ ( 8 ) $ — $ 3,810 Intersegment revenue ( 4 ) 1 6 232 ( 235 ) — Total operating revenue 2,645 945 231 224 ( 235 ) 3,810 Net loss from discontinued — — — ( 541 ) — ( 541 ) Net income (loss) attributable to 535 143 52 ( 573 ) — 157 Nine Months Ended September 30, 2024 Total revenue from external $ 7,786 $ 2,496 $ 843 $ ( 66 ) $ — $ 11,059 Intersegment revenue 2 7 9 743 ( 761 ) — Total operating revenue 7,788 2,503 852 677 ( 761 ) 11,059 Net income from discontinued — — — 182 — 182 Net income attributable to 1,571 296 305 28 — 2,200 Nine Months Ended September 30, 2023 Total revenue from external $ 7,286 $ 2,559 $ 659 $ 355 $ — $ 10,859 Intersegment revenue ( 5 ) 4 14 694 ( 707 ) — Total operating revenue 7,281 2,563 673 1,049 ( 707 ) 10,859 Net loss from discontinued — — — ( 92 ) — ( 92 ) Net income (loss) attributable to 1,315 302 118 ( 14 ) — 1,721
Virginia Electric and Power Company
Segment Reporting Information [Line Items]
Schedule of Segment Reporting Information, by Segment	The following table presents segment information pertaining to Virginia Power’s operations: Dominion Corporate Consolidated (millions) Three Months Ended September 30, 2024 Operating revenue $ 2,762 $ — $ 2,762 Net income (loss) 662 ( 8 ) 654 Three Months Ended September 30, 2023 Operating revenue $ 2,645 $ — $ 2,645 Net income (loss) 535 ( 60 ) 475 Nine Months Ended September 30, 2024 Operating revenue $ 7,788 $ — $ 7,788 Net income 1,571 27 1,598 Nine Months Ended September 30, 2023 Operating revenue $ 7,281 $ — $ 7,281 Net income (loss) 1,315 ( 151 ) 1,164

Significant Accounting Polici_4

Significant Accounting Policies (Reconciliation of Total Cash, Restricted Cash and Equivalents) (Detail) - USD ($) $ in Millions		Sep. 30, 2024	Dec. 31, 2023		Sep. 30, 2023	Dec. 31, 2022
Cash Cash Equivalents And Restricted Cash [Line Items]
Cash and cash equivalents	[1]	$ 1,776	$ 217		$ 176	$ 153
Cash and cash equivalents		1,776	184	[2]
Restricted cash and equivalents	[3],[4]	126	84		71	188
Restricted cash and equivalents			4		4	2
Cash, restricted cash and equivalents shown in the Consolidated Statements of Cash Flows		1,902	301		247	341
Virginia Electric and Power Company
Cash Cash Equivalents And Restricted Cash [Line Items]
Cash and cash equivalents		28	90	[5]	37	22
Restricted cash and equivalents	[4],[6]	104				2
Cash, restricted cash and equivalents shown in the Consolidated Statements of Cash Flows		$ 132	$ 90		$ 37	$ 24

[1] At September 30, 2023, December 31, 2023 and December 31, 2022, Dominion Energy had $ 39 million, $ 33 million and $ 34 million, respectively, of cash and cash equivalents included in current assets held for sale. Dominion Energy’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. At September 30, 2023, December 31, 2023 and December 31, 2022, Dominion Energy had $ 4 million, $ 4 million and $ 2 million, respectively, of restricted cash and equivalents included in current assets held for sale with the remaining balances presented within other current assets in Dominion Energy’s Consolidated Balance Sheets. Includes $ 100 million attributable to VIEs at September 30, 2024 . Virginia Power’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. Restricted cash and equivalents balances are presented within other current assets in Virginia Power’s Consolidated Balance Sheets.

Significant Accounting Polici_5

Significant Accounting Policies (Reconciliation of Total Cash, Restricted Cash and Equivalents) (Parenthetical) (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023		Sep. 30, 2023	Dec. 31, 2022
Cash Cash Equivalents And Restricted Cash [Line Items]
Cash and cash equivalents	$ 1,776	$ 184	[1]
Restricted cash and equivalents		$ 4		$ 4	$ 2
Restricted Cash and Cash Equivalents, Current, Statement of Financial Position [Extensible Enumeration]	Current assets held for sale	Current assets held for sale		Current assets held for sale	Current assets held for sale
VIE
Cash Cash Equivalents And Restricted Cash [Line Items]
Restricted cash and equivalents	$ 100
Current Assets Held for Sale
Cash Cash Equivalents And Restricted Cash [Line Items]
Cash and cash equivalents		$ 33		$ 39	$ 34

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

Significant Accounting Polici_6

Significant Accounting Policies (Schedule of Supplemental Cash Flow Information) (Detail) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023
Significant noncash investing and financing activities:
Accrued capital expenditures	[1]	$ 930	$ 884
Leases	[2]	183	294
Virginia Electric and Power Company
Significant noncash investing and financing activities:
Accrued capital expenditures		738	646
Leases	[3]	$ 156	$ 253

[1] See Notes 3 and 17 for noncash financing activities related to debt assumed with closing of the East Ohio Transaction, the Questar Gas Transaction and the PSNC Transaction and the transfer of property associated with the settlement of litigation. Includes $ 100 million and $ 51 million of financing leases at September 30, 2024 and 2023 , respectively, and $ 83 million and $ 243 million of operating leases at September 30, 2024 and 2023 , respectively. Includes $ 89 million and $ 44 million of financing leases at September 30, 2024 and 2023 , respectively, and $ 67 million and $ 209 million of operating leases at September 30, 2024 and 2023 , respectively.

Significant Accounting Polici_7

Significant Accounting Policies (Schedule of Supplemental Cash Flow Information) (Parenthetical) (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Schedule Of Supplemental Cash Flow Information [Line Items]
Financing leases	$ 100	$ 51
Operating leases	83	243
Virginia Electric and Power Company
Schedule Of Supplemental Cash Flow Information [Line Items]
Financing leases	89	44
Operating leases	$ 67	$ 209

Significant Accounting Polici_8

Significant Accounting Policies (Narrative) (Detail) $ in Millions	1 Months Ended	3 Months Ended			9 Months Ended
	May 31, 2024 Station	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)
Asset Retirement Obligations [Line Items]
Impairment of assets and other charges		$ 122		$ 1	$ 219	$ 136
Number of stations maintains inactive or closed units expected to be subject to final rule \| Station	19
Dominion Energy
Asset Retirement Obligations [Line Items]
Increase in asset retirement obligation			$ 1,100
Increase in regulatory assets			536
Increase in property, plant, and equipment		(215)	505
Virginia Electric and Power Company \| Impairment of Assets and Other Charges
Asset Retirement Obligations [Line Items]
Impairment of assets and other charges		25
Impairment of assets and other charges after tax		$ 18
Virginia Power
Asset Retirement Obligations [Line Items]
Number of stations maintains inactive or closed units expected to be subject to final rule \| Station	12
Increase in asset retirement obligation			420
Increase in regulatory assets			234
Increase in property, plant, and equipment			152
Increase in other deferred charges and other assets			$ 34

Acquisitions and Dispositions_2

Acquisitions and Dispositions (Business Review Dispositions) (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Feb. 29, 2024
Business Acquisition And Dispositions [Line Items]
Income tax expense (benefit)	$ 183			$ 195	$ 412	$ 469
Deferred income tax expense (benefit)					(274)	1,439
East Ohio \| Enbridge
Business Acquisition And Dispositions [Line Items]
Disposal group, total value of consideration				6,600		6,600
Disposal group, cash consideration				4,300		4,300
Disposal group, indebtedness				2,300		2,300
Disposal group, recognized a pre-tax loss					102
Disposal group, loss recorded after tax					113
Goodwill write-off					$ 1,500
Deferred income tax expense (benefit)							$ 29
Disposal group, transition services description					At the closing of the East Ohio Transaction, Dominion Energy and Enbridge entered into a transition services agreement pursuant to which Dominion Energy will continue to provide certain services to support the ongoing operations of East Ohio for up to approximately two years. Enbridge has also agreed to provide certain services to Dominion Energy.
PSNC \| Enbridge
Business Acquisition And Dispositions [Line Items]
Disposal group, total value of consideration				3,300		3,300
Disposal group, cash consideration				2,000		2,000
Disposal group, indebtedness				1,300		1,300
Disposal group, recognized a pre-tax loss					$ 33
Disposal group, loss recorded after tax					30
Goodwill write-off					700
Deferred tax of classified held for sale					$ 16		334
Disposal group, transition services description					At the closing of the PSNC Transaction, Dominion Energy and Enbridge entered into a transition services agreement pursuant to which Dominion Energy will continue to provide certain services to support the ongoing operations of PSNC for up to approximately two years. Enbridge has also agreed to provide certain services to Dominion Energy.
Questar Gas and Wexpro \| Enbridge
Business Acquisition And Dispositions [Line Items]
Disposal group, total value of consideration				4,300		4,300
Disposal group, cash consideration				3,000		3,000
Disposal group, indebtedness				$ 1,300		$ 1,300
Disposal group, recognized a pre-tax loss		$ 78			$ 30		284
Disposal group, loss recorded after tax		78			18		279
Goodwill write-off					$ 700
Income tax expense (benefit)		(5)
Deferred income tax expense (benefit)		$ 22					$ 462
Disposal group, transition services description					At the closing of the Questar Gas Transaction, Dominion Energy and Enbridge entered into a transition services agreement pursuant to which Dominion Energy will continue to provide certain services to support the ongoing operations of Questar Gas and Wexpro for up to approximately two years. Enbridge has also agreed to provide certain services to Dominion Energy.
Other Sales \| Tredegar Solar Fund I, LLC
Business Acquisition And Dispositions [Line Items]
Realizable fair value charge net of tax			$ 68
Realizable fair value charge net of tax			$ 51
Other Sales \| Birdseye and Madison [Member]
Business Acquisition And Dispositions [Line Items]
Disposal group, cash consideration								$ 17

Acquisitions and Dispositions -

Acquisitions and Dispositions - (Schedule of Results of Operations of Disposal Groups Reported As Discontinued Operations) (Detail) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2024		Sep. 30, 2023		Sep. 30, 2024		Sep. 30, 2023
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income tax expense (benefit)		$ (10)		$ 1,200		$ 22		$ 1,300
Net income (loss) attributable to Dominion Energy		(13)		(541)		182		(92)
East Ohio \| Enbridge
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Operating revenue				214		229	[1]	761
Operating expense				128	[2]	254	[1],[3]	497	[2]
Other income (expense)				7		(17)	[1]	22
Interest and related charges				19		15	[1]	51
Income (loss) before income taxes				74		(57)	[1]	235
Income tax expense (benefit)				39	[4]	9	[1]	58	[4]
Net income (loss) attributable to Dominion Energy				35	[5]	(66)	[1],[6]	177	[5]
PSNC \| Enbridge
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Operating revenue		81	[1]	86		488	[1]	532
Operating expense		91	[1],[3]	80	[2]	312	[1],[3]	386	[2]
Other income (expense)		5	[1]	3		11	[1]	8
Interest and related charges		16	[1]	13		44	[1]	38
Income (loss) before income taxes		(21)	[1]	(4)		143	[1]	116
Income tax expense (benefit)		(9)	[1]	383	[4]	44	[1]	409	[4]
Net income (loss) attributable to Dominion Energy		$ (12)	[1],[6]	(387)	[5]	99	[1],[6]	(293)	[5]
Questar Gas and Wexpro \| Enbridge
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Operating revenue				150		894	[1]	1,151
Operating expense				127	[2]	746	[1],[3]	939	[2]
Other income (expense)				3		2	[1]	6
Interest and related charges				17		25	[1]	50
Income (loss) before income taxes				9		125	[1]	168
Income tax expense (benefit)				525	[4]	46	[1]	557	[4]
Net income (loss) attributable to Dominion Energy				(516)	[5]	79	[1],[6]	(389)	[5]
Other Sales
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Operating revenue						0
Operating expense	[3]					(8)
Other income (expense)						0
Interest and related charges						0
Income (loss) before income taxes						8
Income tax expense (benefit)						0
Net income (loss) attributable to Dominion Energy	[6]					$ 8
Other Sales \| Tredegar Solar Fund I, LLC
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Operating revenue				2				5
Operating expense	[2]			7				29
Other income (expense)				0				0
Interest and related charges				0				1
Income (loss) before income taxes				(5)				(25)
Income tax expense (benefit)	[4]			(2)				(7)
Net income (loss) attributable to Dominion Energy	[5]			$ (3)				$ (18)

[1] Represents amounts attributable to Dominion Energy prior to the closing of the East Ohio Transaction which closed on March 6, 2024, the PSNC Transaction which closed on September 30, 2024 and the Questar Gas Transaction which closed on May 31, 2024. Other includes a charge of $ 15 million ($ 11 million after-tax) recorded in the second quarter of 2023 associated with the impairment of certain nonregulated solar assets. East Ohio Transaction includes a charge of $ 45 million ($ 33 million after-tax) associated with an increase to certain pension retirement benefits attributable to a plan amendment and a contribution to the defined contribution employee savings plan. See Note 20 for further information on these transactions. Includes amounts recorded in the third quarter of 2023 to reflect the recognition of deferred taxes on the outside basis of the applicable entities’ stock upon meeting the classification as held for sale. Excludes $ 6 million and $ 2 million of income tax expense attributable to consolidated state and interim period tax allocation adjustments for the three and nine months ended September 30, 2023 , respectively. Excludes $ 2 million and $( 71 ) million of income tax expense (benefit) attributable to consolidated state adjustments for the three and nine months ended September 30, 2024 , respectively.

Acquisitions and Dispositions_3

Acquisitions and Dispositions - (Schedule of Results of Operations of Disposal Groups Reported As Discontinued Operations) (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023		Sep. 30, 2024		Sep. 30, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense (benefit)	$ (10)	$ 1,200		$ 22		$ 1,300
Impairment of assets and other charges	122	1		219		136
East Ohio, PSNC and Questar Gas
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense (benefit)	$ 2	6		(71)		2
East Ohio \| Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense (benefit)		$ 39	[1]	9	[2]	$ 58	[1]
Employee benefit plans				45
Employee benefit plans after tax				33
Other Sales
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense (benefit)				0
Other Sales \| Nonregulated Solar Generation Facility
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of assets and other charges				15
Impairment of assets and other charges after tax				$ 11

[1] Includes amounts recorded in the third quarter of 2023 to reflect the recognition of deferred taxes on the outside basis of the applicable entities’ stock upon meeting the classification as held for sale. Represents amounts attributable to Dominion Energy prior to the closing of the East Ohio Transaction which closed on March 6, 2024, the PSNC Transaction which closed on September 30, 2024 and the Questar Gas Transaction which closed on May 31, 2024.

Acquisitions and Dispositions_4

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		Sep. 30, 2024	Dec. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets		$ 26	$ 18,529	[1]
Current liabilities		$ 0	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	[4]		560
Long-term debt			2,286
Other deferred credits and liabilities	[5]		1,437
PSNC \| Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets	[2]		336
Property, plant and equipment, net			2,806
Other deferred charges and other assets, including goodwill and intangible assets	[3]		834
Current liabilities	[4]		224
Long-term debt			948
Other deferred credits and liabilities	[5]		711
Questar Gas and Wexpro \| Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets	[2]		764
Property, plant and equipment, net			4,369
Other deferred charges and other assets, including goodwill and intangible assets	[3]		766
Current liabilities	[4]		389
Long-term debt			1,205
Other deferred credits and liabilities	[5]		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]		1
Property, plant and equipment, net			26
Other deferred charges and other assets, including goodwill and intangible assets	[3]		0
Current liabilities	[4]		7
Long-term debt			0
Other deferred credits and liabilities	[5]		$ 2

[1] Dominion Energy’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. Includes cash and cash equivalents of $ 4 million and regulatory assets of $ 75 million within the East Ohio Transaction, cash and cash equivalents of $ 2 million and regulatory assets of $ 89 million within the PSNC Transaction and cash and cash equivalents of $ 26 million and regulatory assets of $ 297 million within the Questar Gas Transaction at December 31, 2023. ncludes goodwill of $ 1.5 billion and regulatory assets of $ 781 million within the East Ohio Transaction, goodwill of $ 673 million and regulatory assets of $ 86 million within the PSNC Transaction and goodwill of $ 720 million and regulatory assets of $( 39 ) million within the Questar Gas Transaction at December 31, 2023. Includes regulatory liabilities of $ 54 million within the East Ohio Transaction, $ 44 million within the PSNC Transaction and $ 55 million within the Questar Gas Transaction at December 31, 2023. Includes regulatory liabilities of $ 711 million within the East Ohio Transaction, $ 435 million within the PSNC Transaction and $ 502 million within the Questar Gas Transaction at December 31, 2023.

Acquisitions and Dispositions_5

Acquisitions and Dispositions - (Schedule Of Major Classes Of Assets And Liabilities Relating To The Disposal Groups Reported As Held For Sale) (Parenthetical) (Detail) - Enbridge $ in Millions	Dec. 31, 2023 USD ($)
East Ohio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and Cash Equivalents	$ 4
Regulatory assets	75
Goodwill	1,500
Other deferred charges and other assets, including regulatory assets	781
Regulatory liabilities	54
Other deferred credits and liabilities including regulatory liabilities	711
PSNC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and Cash Equivalents	2
Regulatory assets	89
Goodwill	673
Other deferred charges and other assets, including regulatory assets	86
Regulatory liabilities	44
Other deferred credits and liabilities including regulatory liabilities	435
Questar Gas and Wexpro
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and Cash Equivalents	26
Regulatory assets	297
Goodwill	720
Other deferred charges and other assets, including regulatory assets	39
Regulatory liabilities	55
Other deferred credits and liabilities including regulatory liabilities	$ 502

Acquisitions and Dispositions_6

Acquisitions and Dispositions - (Schedule of Capital Expenditures and Significant Noncash Items Reported As Discontinued Operations) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024		Sep. 30, 2023
Significant noncash items
Depreciation, depletion and amortization		$ 549	$ 667	$ 1,791		$ 1,896
Accrued capital expenditures	[1]			930		884
East Ohio \| Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Capital expenditures				65	[2]	355
Significant noncash items
Depreciation, depletion and amortization				0	[2]	109
Accrued capital expenditures						53
PSNC \| Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Capital expenditures				287	[2]	153
Significant noncash items
Depreciation, depletion and amortization				0	[2]	67
Accrued capital expenditures						22
Questar Gas and Wexpro \| Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Capital expenditures				160	[2]	290
Significant noncash items
Depreciation, depletion and amortization				0	[2]	130
Accrued capital expenditures						33
Other Sales
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Capital expenditures				0
Significant noncash items
Depreciation, depletion and amortization				$ 0
Other Sales \| Tredegar Solar Fund I, LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Capital expenditures						0
Significant noncash items
Depreciation, depletion and amortization						2
Accrued capital expenditures						$ 0

[1] See Notes 3 and 17 for noncash financing activities related to debt assumed with closing of the East Ohio Transaction, the Questar Gas Transaction and the PSNC Transaction and the transfer of property associated with the settlement of litigation. Represents amounts attributable to Dominion Energy prior to the closing of the East Ohio Transaction which closed on March 6, 2024, the PSNC Transaction which closed on September 30, 2024 and the Questar Gas Transaction which closed on May 31, 2024, respectively.

Operating Revenue (Schedule of

Operating Revenue (Schedule of Operating Revenue) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		$ 3,785	$ 3,758	$ 10,764	$ 10,290
Other revenues	[1],[2]	156	52	295	569
Total operating revenue		3,941	3,810	11,059	10,859
Regulated Electric Sales \| Residential
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		1,535	1,558	4,184	3,968
Regulated Electric Sales \| Commercial
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		1,248	1,236	3,533	3,453
Regulated Electric Sales \| Industrial
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		216	227	642	658
Regulated Electric Sales \| Government and Other Retail
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		303	288	812	764
Regulated Electric Sales \| Wholesale
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		39	53	108	133
Nonregulated Electric Sales
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		239	229	693	611
Regulated Gas Sales \| Residential
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		30	28	223	207
Regulated Gas Sales \| Commercial
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		24	25	100	106
Regulated Gas Sales \| Other
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		15	19	50	58
Regulated Gas Transportation and Storage
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		6	4	15	13
Other regulated revenue
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		87	61	293	204
Other Nonregulated Revenues
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers	[2],[3],[4]	43	30	111	115
Virginia Electric and Power Company
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		2,705	2,598	7,590	7,133
Other revenues	[1],[2]	57	47	198	148
Total operating revenue		2,762	2,645	7,788	7,281
Virginia Electric and Power Company \| Regulated Electric Sales \| Residential
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		1,155	1,133	3,183	2,975
Virginia Electric and Power Company \| Regulated Electric Sales \| Commercial
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		998	962	2,851	2,745
Virginia Electric and Power Company \| Regulated Electric Sales \| Industrial
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		113	109	330	324
Virginia Electric and Power Company \| Regulated Electric Sales \| Government and Other Retail
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		285	269	763	711
Virginia Electric and Power Company \| Regulated Electric Sales \| Wholesale
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		29	37	82	88
Virginia Electric and Power Company \| Nonregulated Electric Sales
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		30	22	69	55
Virginia Electric and Power Company \| Other regulated revenue
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers		84	57	282	193
Virginia Electric and Power Company \| Other Nonregulated Revenues
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers	[2],[3],[4]	$ 11	$ 9	$ 30	$ 42

[1] Includes alternative revenue of $ 24 million and $ 34 million for the three months ended September 30, 2024 and 2023, respectively, and $ 85 million and $ 111 million for the nine months ended September 30, 2024 and 2023, respectively, at both Dominion Energy and Virginia Power. See Note 19 for amounts attributable to affiliates. Includes revenue from transition services agreements of $ 17 million and $ 3 million for the three months ended September 30, 2024 and 2023, respectively, and $ 34 million and $ 16 million for the nine months ended September 30, 2024 and 2023, respectively, at Dominion Energy. Sales of renewable energy credits were $ 10 million and $ 7 million for the three months ended September 30, 2024 and 2023, respectively, and $ 22 million and $ 36 million for the nine months ended September 30, 2024 and 2023, respectively, at Dominion Energy and $ 4 million and $ 2 million for the three months ended September 30, 2024 and 2023, respectively, and $ 9 million and $ 24 million for the nine months ended September 30, 2024 and 2023, respectively, at Virginia Power.

Operating Revenue (Schedule o_2

Operating Revenue (Schedule of Operating Revenue) (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers	$ 3,785	$ 3,758	$ 10,764	$ 10,290
Renewable Energy Investment Tax Credits
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers	10	7	22	36
Alternative Revenue Programs
Public Utilities General Disclosures [Line Items]
Other revenues	24	34	85	111
Transition services agreements
Public Utilities General Disclosures [Line Items]
Other revenues	17	3	34	16
Virginia Electric and Power Company
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers	2,705	2,598	7,590	7,133
Virginia Electric and Power Company \| Renewable Energy Investment Tax Credits
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers	$ 4	$ 2	$ 9	$ 24

Operating Revenue (Narrative) (

Operating Revenue (Narrative) (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Revenues From Contract With Customer [Line Items]
Revenue recognized from contract liability balances	$ 45	$ 48
Other Current Liabilities and Other Deferred Credits and Other Liabilities
Revenues From Contract With Customer [Line Items]
Contract liability balances	50		$ 47
Virginia Electric and Power Company
Revenues From Contract With Customer [Line Items]
Revenue recognized from contract liability balances	40	$ 39
Virginia Electric and Power Company \| Other Current Liabilities and Other Deferred Credits and Other Liabilities
Revenues From Contract With Customer [Line Items]
Contract liability balances	$ 43		$ 40

Income Taxes (Reconciliation of

Income Taxes (Reconciliation of Income Taxes at the U.S. Statutory Federal Income Tax Rate) (Detail)	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Effective Income Tax Computation [Line Items]
U.S. statutory rate	21%	21%
Increases (reductions) resulting from:
State taxes, net of federal benefit	3.30%	3.90%
Investment tax credits	(1.20%)	(1.50%)
Production tax credits	(2.80%)	(0.60%)
Reversal of excess deferred income taxes	(2.40%)	(2.60%)
Changes in state deferred taxes associated with assets held for sale	0%	1.30%
AFUDC - equity	(0.60%)	(0.10%)
Other, net	(0.40%)	(0.80%)
Effective tax rate	16.90%	20.60%
Virginia Electric and Power Company
Effective Income Tax Computation [Line Items]
U.S. statutory rate	21%	21%
Increases (reductions) resulting from:
State taxes, net of federal benefit	4.40%	4.60%
Investment tax credits	(0.80%)	(0.70%)
Production tax credits	(3.00%)	(0.90%)
Reversal of excess deferred income taxes	(1.80%)	(2.60%)
Changes in state deferred taxes associated with assets held for sale	0%	0%
AFUDC - equity	(0.60%)	0%
Other, net	0.30%	(0.30%)
Effective tax rate	19.50%	21.10%

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Income Taxes (Narrative) (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Taxes [Line Items]
Income tax expense (benefit)	$ 183	$ 195	$ 412	$ 469
Income tax (benefit) expense from discontinued operations	(10)	1,200	22	1,300
Cove Point
Income Taxes [Line Items]
Income tax (benefit) expense from discontinued operations		7		31
East Ohio, PSNC and Questar Gas
Income Taxes [Line Items]
Discontinued operations, deferred tax liabilities	$ 825		$ 825
East Ohio, PSNC and Questar Gas \| Cove Point
Income Taxes [Line Items]
Income tax expense (benefit)				29
Ownership percentage	50%		50%
East Ohio, Questar Gas and PSNC Transactions
Income Taxes [Line Items]
Income tax expense (benefit)			$ 52
Discontinued operations, deferred tax liabilities	$ 841		841
Virginia Electric and Power Company
Income Taxes [Line Items]
Income tax expense (benefit)	$ 141	$ 128	386	$ 311
Production tax credit			$ 53

Earnings Per Share (Calculation

Earnings Per Share (Calculation of Basic and Diluted EPS) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net income attributable to Dominion Energy from continuing operations		$ 967	$ 698	$ 2,018	$ 1,813
Preferred stock dividends (see Note 16)		(15)	(20)	(54)	(60)
Preferred stock deemed dividends (see Note 16)		0	0	(9)	0
Net income attributable to Dominion Energy from continuing operations - Basic		952	678	1,955	1,753
Net income attributable to Dominion Energy from continuing operations - Diluted		952	678	1,955	1,753
Net income (loss) attributable to Dominion Energy		$ (13)	$ (541)	$ 182	$ (92)
Average shares of common stock outstanding – Basic		839	836.8	838.3	836
Net effect of dilutive securities	[1]	0.3	0	0.1	0.2
Average shares of common stock outstanding – Diluted		839.3	836.8	838.4	836.2
EPS from continuing operations – Basic		$ 1.14	$ 0.81	$ 2.33	$ 2.10
EPS from discontinued operations – Basic		(0.02)	(0.65)	0.22	(0.11)
Net income attributable to Dominion Energy		1.12	0.16	2.55	1.99
EPS from continuing operations – Diluted		1.14	0.81	2.33	2.10
EPS from discontinued operations – Diluted		(0.02)	(0.65)	0.22	(0.11)
Net income attributable to Dominion Energy		$ 1.12	$ 0.16	$ 2.55	$ 1.99

[1] Dilutive securities for the three and nine months ended September 30, 2024 consists of certain of the forward sales agreements entered into in the second and third quarters of 2024 (applying the treasury stock method). Dilutive securities for the nine months ended September 30, 2023 include stock potentially to be issued to satisfy the obligation under a settlement agreement with the SCDOR (applying the if converted method). See Notes 16 and 17 for additional information.

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Schedule of Changes in AOCI Net of Tax and Reclassifications out of AOCI by Component) (Detail) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2024		Sep. 30, 2023		Sep. 30, 2024		Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	[1]					$ 27,529
Total other comprehensive income (loss)		$ 33		$ 1		(148)		$ 7
Ending balance		27,531				27,531
Virginia Electric and Power Company
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		22,359		17,638		21,657	[2]	16,949
Income before income tax expense		795		603		1,984		1,475
Total other comprehensive income (loss)		(2)		15		5		15
Ending balance		23,010		18,128		23,010		18,128
Total Derivative-Hedging Activities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(191)	[3],[4]	(236)	[3],[4]	(216)	[5],[6]	(249)	[5],[6]
Other comprehensive income (loss) before reclassifications: gains (losses)		(7)	[3],[4]	19	[3],[4]	2	[5],[6]	16	[5],[6]
Income tax expense (benefit)		(3)	[3],[4]	(3)	[3],[4]	(9)	[5],[6]	(8)	[5],[6]
Total, net of tax		8	[3],[4]	8	[3],[4]	24	[5],[6]	24	[5],[6]
Total other comprehensive income (loss)		1	[3],[4]	27	[3],[4]	26	[5],[6]	40	[5],[6]
Ending balance	[3],[4],[6]	(190)		(209)		(190)		(209)
Total Derivative-Hedging Activities \| Virginia Electric and Power Company
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		24	[7],[8]	13	[7],[8]	15	[9],[10]	16	[9],[10]
Other comprehensive income (loss) before reclassifications: gains (losses)		(7)	[7],[8]	18	[7],[8]	2	[9],[10]	15	[9],[10]
Interest and related charges (benefit)	[7],[8]	0
Income tax expense (benefit)		0	[7],[8]	(1)	[3],[8]	0	[9],[10]	(1)	[9],[10]
Total, net of tax		0	[3],[8]	0	[7],[8]	0	[9],[10]	0	[9],[10]
Total other comprehensive income (loss)		(7)	[7],[8]	18	[7],[8]	2	[9],[10]	15	[9],[10]
Ending balance	[7],[8],[10]	17		31		17		31
Total Derivative-Hedging Activities \| Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest and related charges (benefit)		11	[3],[4]	11	[3],[4]	33	[5],[6]	32	[5],[6]
Discontinued operations				0	[3],[4]			0	[5],[6]
Income (loss) before income tax expense		11	[3],[4]	11	[3],[4]	33	[5],[6]	32	[5],[6]
Total Derivative-Hedging Activities \| Reclassification out of Accumulated Other Comprehensive Income \| Virginia Electric and Power Company
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest and related charges (benefit)				1	[7],[8]			1	[9],[10]
Income (loss) before income tax expense		0	[7],[8]	1	[3],[8]	0	[9],[10]	1	[9],[10]
Investment Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(13)	[11]	(29)	[11]	0	[12]	(44)	[12]
Other comprehensive income (loss) before reclassifications: gains (losses)		32	[11]	(22)	[11]	13	[12]	(6)	[12]
Income tax expense (benefit)		1	[11]	0	[11]	(1)	[12]	0	[12]
Total, net of tax		(1)	[11]	2	[11]	5	[12]	1	[12]
Total other comprehensive income (loss)		31	[11]	(20)	[11]	18	[12]	(5)	[12]
Ending balance	[11],[12]	18		(49)		18		(49)
Investment Securities \| Virginia Electric and Power Company
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(1)	[13]	(4)	[13]	1	[14]	(7)	[14]
Other comprehensive income (loss) before reclassifications: gains (losses)		6	[13]	(3)	[13]	2	[14]	0	[14]
Income tax expense (benefit)		(1)	[13]	0	[13]	(1)	[14]	0	[14]
Total, net of tax		(1)	[13]	0	[13]	1	[14]	0	[14]
Total other comprehensive income (loss)		5	[13]	(3)	[13]	3	[14]	0	[14]
Ending balance	[13],[14]	4		(7)		4		(7)
Investment Securities \| Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Discontinued operations				0	[11]			0	[12]
Other income (expense)		(2)	[11]	2	[11]	6	[12]	1	[12]
Income (loss) before income tax expense		(2)	[11]	2	[11]	6	[12]	1	[12]
Investment Securities \| Reclassification out of Accumulated Other Comprehensive Income \| Virginia Electric and Power Company
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income (expense)		0	[13]	0	[13]	2	[14]	0	[14]
Income (loss) before income tax expense		0	[13]	0	[13]	2	[14]	0	[14]
Pension and Other Postretirement Benefit Costs
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(1,483)	[15]	(1,299)	[15]	(1,290)	[16]	(1,276)	[16]
Other comprehensive income (loss) before reclassifications: gains (losses)		4	[15]	0	[15]	(249)	[16]	0	[16]
Income tax expense (benefit)		1	[15]	7	[15]	(20)	[16]	15	[16]
Total, net of tax		(3)	[15]	(8)	[15]	57	[16]	(31)	[16]
Total other comprehensive income (loss)		1	[15]	(8)	[15]	(192)	[16]	(31)	[16]
Ending balance	[15],[16]	(1,482)		(1,307)		(1,482)		(1,307)
Pension and Other Postretirement Benefit Costs \| Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Discontinued operations				0	[15]			0	[16]
Other income (expense)		(4)	[15]	(15)	[15]	77	[16]	(46)	[16]
Income (loss) before income tax expense		(4)	[15]	(15)	[15]	77	[16]	(46)	[16]
Equity Method Investees
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		0	[17]	(2)	[17]	0	[18]	(3)	[18]
Other comprehensive income (loss) before reclassifications: gains (losses)		0	[17]	(1)	[17]	0	[18]	0	[18]
Income tax expense (benefit)		0	[17]	(1)	[17]	0	[18]	(1)	[18]
Total, net of tax		0	[17]	3	[17]	0	[18]	3	[18]
Total other comprehensive income (loss)		0	[17]	2	[17]	0	[18]	3	[18]
Ending balance	[17],[18]	0		0		0		0
Equity Method Investees \| Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Discontinued operations				4	[17]			4	[18]
Other income (expense)		0	[17]	0	[17]	0	[18]	0	[18]
Income (loss) before income tax expense		0	[17]	4	[17]	0	[18]	4	[18]
AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(1,687)		(1,566)		(1,506)		(1,572)
Other comprehensive income (loss) before reclassifications: gains (losses)		29		(4)		(234)		10
Income tax expense (benefit)		(1)		3		(30)		6
Total, net of tax		4		5		86		(3)
Total other comprehensive income (loss)		33		1		(148)		7
Ending balance		(1,654)		(1,565)		(1,654)		(1,565)
AOCI \| Virginia Electric and Power Company
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		23		9		16		9
Other comprehensive income (loss) before reclassifications: gains (losses)		(1)		15		4		15
Income tax expense (benefit)		(1)		(1)		(1)		(1)
Total, net of tax		(1)		0		1		0
Total other comprehensive income (loss)		(2)		15		5		15
Ending balance		21		24		21		24
AOCI \| Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest and related charges (benefit)		11		11		33		32
Discontinued operations				4				4
Other income (expense)		(6)		(13)		83		(45)
Income (loss) before income tax expense		5		2		116		(9)
AOCI \| Reclassification out of Accumulated Other Comprehensive Income \| Virginia Electric and Power Company
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest and related charges (benefit)		0		1				1
Other income (expense)		0		0		2		0
Income (loss) before income tax expense		$ 0		$ 1		$ 2		$ 1

[1] Dominion Energy’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. Virginia Power’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. Comprised entirely of interest rate derivative hedging activities. Net of $ 64 million, $ 64 million, $ 70 million and $ 79 million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. Comprised entirely of interest rate derivative hedging activities. Net of $ 64 million, $ 73 million, $ 70 million and $ 83 million tax at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively. Comprised entirely of interest rate derivative hedging activities. Net of $( 6 ) million, $( 8 ) million, $( 11 ) million and $( 4 ) million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. Comprised entirely of interest rate derivative hedging activities. Net of $( 6 ) million, $( 5 ) million, $( 11 ) million and $( 5 ) million tax at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively. Net of $( 5 ) million, $ 3 million, $ 16 million and $ 9 million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. Net of $( 5 ) million, $( 2 ) million, $ 16 million and $ 13 million tax at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively. Net of $( 2 ) million, $ — million, $ 3 million and $ 1 million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. Net of $( 2 ) million, $ — million, $ 3 million and $ 2 million tax at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively. Net of $ 522 million, $ 522 million, $ 461 million and $ 453 million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. Net of $ 522 million, $ 456 million, $ 461 million and $ 445 million tax at September 30, 2024, December 31, 2023, September 30, 2023 and December 31, 2022, respectively. Net of $ — million tax at September 30, 2024, June 30, 2024, September 30, 2023 and June 30, 2023, respectively. Net of $ — million tax at September 30, 2024, December 31, 2023, September 30, 2023 and $ 1 million tax at December 31, 2022, respectively.

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) (Schedule of Changes in AOCI Net of Tax and Reclassifications out of AOCI by Component) (Parenthetical) (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Total Derivative-Hedging Activities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount of tax	$ 64	$ 64	$ 73	$ 70	$ 79	$ 83
Total Derivative-Hedging Activities \| Virginia Electric and Power Company
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount of tax	(6)	(8)	(5)	(11)	(4)	(5)
Investment Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount of tax	(5)	3	(2)	16	9	13
Investment Securities \| Virginia Electric and Power Company
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount of tax	(2)	0	0	3	1	2
Pension and Other Postretirement Benefit Costs
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount of tax	522	522	456	461	453	445
Equity Method Investees
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount of tax	$ 0	$ 0	$ 0	$ 0	$ 0	$ 1

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value, Option, Quantitative Disclosures) (Detail) $ in Millions		9 Months Ended
		Sep. 30, 2024 USD ($) $ / MMBTU $ / MWh	Dec. 31, 2023 USD ($)
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets		$ 1,160	$ 1,350
Fair Value of Derivative Liabilities		181	697
Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets		199	298
Fair Value of Derivative Liabilities		112	316
Fair Value, Measurements, Recurring
Fair Value, Option, Quantitative Disclosures [Line Items]
Total assets		8,959	7,865
Total liabilities		181	697
Fair Value, Measurements, Recurring \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Total assets		4,378	3,770
Total liabilities		112	316
Fair Value, Measurements, Recurring \| Commodity Contract
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets		109	550
Fair Value of Derivative Liabilities		450	299
Fair Value, Measurements, Recurring \| Commodity Contract \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets		60	117
Fair Value of Derivative Liabilities		146	232
Fair Value, Measurements, Recurring \| Level 3
Fair Value, Option, Quantitative Disclosures [Line Items]
Total assets		282	225
Total liabilities		13	139
Fair Value, Measurements, Recurring \| Level 3 \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Total assets		93	21
Total liabilities		2	137
Fair Value, Measurements, Recurring \| Level 3 \| Commodity Contract
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets		13	225
Fair Value of Derivative Liabilities		282	139
Fair Value, Measurements, Recurring \| Level 3 \| Commodity Contract \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets		2	21
Fair Value of Derivative Liabilities		93	$ 137
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| Natural Gas \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	[1],[2]	8
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| Natural Gas \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	[1],[2]	$ 8
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| Natural Gas \| Minimum \| Assets \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2]	(2)
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| Natural Gas \| Minimum \| Assets \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2]	(2)
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| Natural Gas \| Maximum \| Assets \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2]	4
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| Natural Gas \| Maximum \| Assets \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2]	3
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| Natural Gas \| Weighted Average \| Assets \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2],[3]	(1)
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| Natural Gas \| Weighted Average \| Assets \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2],[3]	(1)
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| FTRs \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	[2]	$ 72
Fair Value of Derivative Liabilities	[2]	1
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| FTRs \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	[2]	72
Fair Value of Derivative Liabilities	[2]	$ 1
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| FTRs \| Minimum \| Assets \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2]	(4)
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| FTRs \| Minimum \| Assets \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2]	(4)
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| FTRs \| Minimum \| Liabilities \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2]	(6)
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| FTRs \| Minimum \| Liabilities \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2]	(6)
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| FTRs \| Maximum \| Assets \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2]	11
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| FTRs \| Maximum \| Assets \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2]	11
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| FTRs \| Maximum \| Liabilities \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2]	7
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| FTRs \| Maximum \| Liabilities \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2]	7
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| FTRs \| Weighted Average \| Assets \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2],[3]	4
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| FTRs \| Weighted Average \| Assets \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2],[3]	4
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| FTRs \| Weighted Average \| Liabilities \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2],[3]	1
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| FTRs \| Weighted Average \| Liabilities \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2],[3]	1
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| Electricity \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	[2]	$ 186
Fair Value of Derivative Liabilities	[2]	$ 11
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| Electricity \| Minimum \| Assets \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2]	27
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| Electricity \| Minimum \| Liabilities \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2]	35
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| Electricity \| Maximum \| Assets \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2]	118
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| Electricity \| Maximum \| Liabilities \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2]	118
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| Electricity \| Weighted Average \| Assets \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2],[3]	48
Fair Value, Measurements, Recurring \| Level 3 \| Discounted cash flow \| Commodity Contract \| Electricity \| Weighted Average \| Liabilities \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MWh	[2],[3]	62
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	[1],[2]	$ 16
Fair Value of Derivative Liabilities	[1],[2]	1
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	[1],[2]	13
Fair Value of Derivative Liabilities	[1],[2]	$ 1
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Minimum \| Assets \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2]	1
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Minimum \| Assets \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2]	1
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Minimum \| Assets \| Price Volatility
Fair Value, Option, Quantitative Disclosures [Line Items]
Price volatility (percentage)	[1],[4]	10%
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Minimum \| Assets \| Price Volatility \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Price volatility (percentage)	[1],[4]	14%
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Minimum \| Liabilities \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2]	1
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Minimum \| Liabilities \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2]	1
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Minimum \| Liabilities \| Price Volatility
Fair Value, Option, Quantitative Disclosures [Line Items]
Price volatility (percentage)	[1],[4]	44%
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Minimum \| Liabilities \| Price Volatility \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Price volatility (percentage)	[1],[4]	44%
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Maximum \| Assets \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2]	5
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Maximum \| Assets \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2]	5
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Maximum \| Assets \| Price Volatility
Fair Value, Option, Quantitative Disclosures [Line Items]
Price volatility (percentage)	[1],[4]	71%
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Maximum \| Assets \| Price Volatility \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Price volatility (percentage)	[1],[4]	71%
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Maximum \| Liabilities \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2]	3
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Maximum \| Liabilities \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2]	3
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Maximum \| Liabilities \| Price Volatility
Fair Value, Option, Quantitative Disclosures [Line Items]
Price volatility (percentage)	[1],[4]	54%
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Maximum \| Liabilities \| Price Volatility \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Price volatility (percentage)	[1],[4]	54%
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Weighted Average \| Assets \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2],[3]	3
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Weighted Average \| Assets \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2],[3]	3
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Weighted Average \| Assets \| Price Volatility
Fair Value, Option, Quantitative Disclosures [Line Items]
Price volatility (percentage)	[1],[3],[4]	46%
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Weighted Average \| Assets \| Price Volatility \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Price volatility (percentage)	[1],[3],[4]	52%
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Weighted Average \| Liabilities \| Market Price
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2],[3]	2
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Weighted Average \| Liabilities \| Market Price \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price \| $ / MMBTU	[1],[2],[3]	2
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Weighted Average \| Liabilities \| Price Volatility
Fair Value, Option, Quantitative Disclosures [Line Items]
Price volatility (percentage)	[1],[3],[4]	50%
Fair Value, Measurements, Recurring \| Level 3 \| Option Model \| Commodity Contract \| Natural Gas \| Weighted Average \| Liabilities \| Price Volatility \| Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Price volatility (percentage)	[1],[3],[4]	50%

[1] Includes basis. Represents market prices beyond defined terms for Levels 1 and 2. Averages weighted by volume. Represents volatilities unrepresented in published markets.

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Detail) - USD ($)	3 Months Ended					9 Months Ended
Fair Value Measurements (Narrative) (Detail) - USD ($)	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gains (losses) included in operating revenue in Level 3 fair value category	$ 12,000,000		$ (10,000,000)			$ 7,000,000	$ (8,000,000)
Impairment of assets and other charges	122,000,000		1,000,000			219,000,000	136,000,000
Level 2 \| Nonregulated Solar Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets, estimated fair value				$ 22,000,000
Impairment of Assets and Other Charges \| Nonregulated Solar Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of assets and other charges				15,000,000
Asset impairment charges after tax				$ 11,000,000
Impairment of Assets and Other Charges \| Corporate Office Building
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of assets and other charges		$ 17,000,000			$ 91,000,000
Asset impairment charges after tax		$ 12,000,000			$ 68,000,000
Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gains (losses) included in operating revenue in Level 3 fair value category	0		$ 0			$ 0	$ 0
Virginia Electric and Power Company \| Impairment of Assets and Other Charges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of assets and other charges	25,000,000
Asset impairment charges after tax	$ 18,000,000

Fair Value Measurements (Assets

Fair Value Measurements (Assets and Liabilities that are Measured at Fair Value on a Recurring Basis) (Detail) - USD ($) $ in Millions		Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		$ 1,160	$ 1,350
Total derivative liabilities		181	697
Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		199	298
Total derivative liabilities		112	316
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets		8,959	7,865
Total Liabilities		181	697
Fair Value, Measurements, Recurring \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets		4,378	3,770
Total Liabilities		112	316
Fair Value, Measurements, Recurring \| Equity securities: \| U.S.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	5,473	4,527
Fair Value, Measurements, Recurring \| Equity securities: \| U.S. \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	2,818	2,362
Fair Value, Measurements, Recurring \| Fixed Income \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents and other	[1]	2	20
Fair Value, Measurements, Recurring \| Fixed Income \| Corporate debt instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	578	500
Fair Value, Measurements, Recurring \| Fixed Income \| Corporate debt instruments \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	351	274
Fair Value, Measurements, Recurring \| Fixed Income \| Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	1,605	1,457
Fair Value, Measurements, Recurring \| Fixed Income \| Government Securities \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	912	816
Fair Value, Measurements, Recurring \| Fixed Income \| Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	141
Fair Value, Measurements, Recurring \| Fixed Income \| Other \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	96
Fair Value, Measurements, Recurring \| Cash Equivalents and Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents and other	[1]	2	31
Fair Value, Measurements, Recurring \| Foreign Currency Exchange Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		8
Total derivative liabilities		52	39
Fair Value, Measurements, Recurring \| Foreign Currency Exchange Rate \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		8
Total derivative liabilities		52	39
Fair Value, Measurements, Recurring \| Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		109	550
Total derivative liabilities		450	299
Fair Value, Measurements, Recurring \| Commodity \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		60	117
Total derivative liabilities		146	232
Fair Value, Measurements, Recurring \| Interest Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		20	800
Total derivative liabilities		702	359
Fair Value, Measurements, Recurring \| Interest Rate \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		0	181
Total derivative liabilities		45	45
Fair Value, Measurements, Recurring \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets		5,614	4,777
Total Liabilities		0	0
Fair Value, Measurements, Recurring \| Level 1 \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets		2,914	2,511
Total Liabilities		0	0
Fair Value, Measurements, Recurring \| Level 1 \| Equity securities: \| U.S.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	5,473	4,527
Fair Value, Measurements, Recurring \| Level 1 \| Equity securities: \| U.S. \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	2,818	2,362
Fair Value, Measurements, Recurring \| Level 1 \| Fixed Income \| Corporate debt instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Fixed Income \| Corporate debt instruments \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Fixed Income \| Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0	219
Fair Value, Measurements, Recurring \| Level 1 \| Fixed Income \| Government Securities \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0	129
Fair Value, Measurements, Recurring \| Level 1 \| Fixed Income \| Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	141
Fair Value, Measurements, Recurring \| Level 1 \| Fixed Income \| Other \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	96
Fair Value, Measurements, Recurring \| Level 1 \| Cash Equivalents and Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents and other	[1]	0	31
Fair Value, Measurements, Recurring \| Level 1 \| Cash Equivalents and Other \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents and other	[1]	0	20
Fair Value, Measurements, Recurring \| Level 1 \| Foreign Currency Exchange Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		0
Total derivative liabilities		0	0
Fair Value, Measurements, Recurring \| Level 1 \| Foreign Currency Exchange Rate \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		0
Total derivative liabilities		0	0
Fair Value, Measurements, Recurring \| Level 1 \| Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		0	0
Total derivative liabilities		0	0
Fair Value, Measurements, Recurring \| Level 1 \| Commodity \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		0	0
Total derivative liabilities		0	0
Fair Value, Measurements, Recurring \| Level 1 \| Interest Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		0	0
Total derivative liabilities		0	0
Fair Value, Measurements, Recurring \| Level 1 \| Interest Rate \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		0	0
Total derivative liabilities		0	0
Fair Value, Measurements, Recurring \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets		3,063	2,863
Total Liabilities		168	558
Fair Value, Measurements, Recurring \| Level 2 \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets		1,371	1,238
Total Liabilities		110	179
Fair Value, Measurements, Recurring \| Level 2 \| Equity securities: \| U.S.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0	0
Fair Value, Measurements, Recurring \| Level 2 \| Equity securities: \| U.S. \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0	0
Fair Value, Measurements, Recurring \| Level 2 \| Fixed Income \| Corporate debt instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	578	500
Fair Value, Measurements, Recurring \| Level 2 \| Fixed Income \| Corporate debt instruments \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	351	274
Fair Value, Measurements, Recurring \| Level 2 \| Fixed Income \| Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	1,605	1,238
Fair Value, Measurements, Recurring \| Level 2 \| Fixed Income \| Government Securities \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	912	687
Fair Value, Measurements, Recurring \| Level 2 \| Fixed Income \| Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0
Fair Value, Measurements, Recurring \| Level 2 \| Fixed Income \| Other \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0
Fair Value, Measurements, Recurring \| Level 2 \| Cash Equivalents and Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents and other	[1]	2	0
Fair Value, Measurements, Recurring \| Level 2 \| Cash Equivalents and Other \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents and other	[1]	2	0
Fair Value, Measurements, Recurring \| Level 2 \| Foreign Currency Exchange Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		8
Total derivative liabilities		52	39
Fair Value, Measurements, Recurring \| Level 2 \| Foreign Currency Exchange Rate \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		8
Total derivative liabilities		52	39
Fair Value, Measurements, Recurring \| Level 2 \| Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		96	325
Total derivative liabilities		168	160
Fair Value, Measurements, Recurring \| Level 2 \| Commodity \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		58	96
Total derivative liabilities		53	95
Fair Value, Measurements, Recurring \| Level 2 \| Interest Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		20	800
Total derivative liabilities		702	359
Fair Value, Measurements, Recurring \| Level 2 \| Interest Rate \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		0	181
Total derivative liabilities		45	45
Fair Value, Measurements, Recurring \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets		282	225
Total Liabilities		13	139
Fair Value, Measurements, Recurring \| Level 3 \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets		93	21
Total Liabilities		2	137
Fair Value, Measurements, Recurring \| Level 3 \| Equity securities: \| U.S.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Equity securities: \| U.S. \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Fixed Income \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents and other	[1]	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Fixed Income \| Corporate debt instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Fixed Income \| Corporate debt instruments \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Fixed Income \| Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Fixed Income \| Government Securities \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Fixed Income \| Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0
Fair Value, Measurements, Recurring \| Level 3 \| Fixed Income \| Other \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	[1]	0
Fair Value, Measurements, Recurring \| Level 3 \| Cash Equivalents and Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents and other	[1]	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Foreign Currency Exchange Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		0
Total derivative liabilities		0	0
Fair Value, Measurements, Recurring \| Level 3 \| Foreign Currency Exchange Rate \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		0
Total derivative liabilities		0	0
Fair Value, Measurements, Recurring \| Level 3 \| Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		13	225
Total derivative liabilities		282	139
Fair Value, Measurements, Recurring \| Level 3 \| Commodity \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		2	21
Total derivative liabilities		93	137
Fair Value, Measurements, Recurring \| Level 3 \| Interest Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		0	0
Total derivative liabilities		0	0
Fair Value, Measurements, Recurring \| Level 3 \| Interest Rate \| Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets		0	0
Total derivative liabilities		$ 0	$ 0

[1] Includes investments held in the nuclear decommissioning trusts and rabbi trusts. Excludes $ 211 million and $ 457 million of assets at Dominion Energy, inclusive of $ 77 million and $ 217 million at Virginia Power, at September 30, 2024 and December 31, 2023 , respectively, measured at fair value using NAV (or its equivalent) as a practical expedient which are not required to be categorized in the fair value hierarchy.

Fair Value Measurements (Asse_2

Fair Value Measurements (Assets and Liabilities that are Measured at Fair Value on a Recurring Basis) (Parenthetical) (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value using NAV	$ 211	$ 457
Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value using NAV	$ 77	$ 217

Fair Value Measurements (Net Ch

Fair Value Measurements (Net Change in the Assets and Liabilities Measured at Fair Value on a Recurring Basis and Included in the Level 3 Fair Value Category) (Detail) - Commodity - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	$ 360	$ 134	$ 86	$ 422
Total realized and unrealized gains (losses):
Included in earnings	14	(103)	(134)	(191)
Operating Revenue	$ 13	$ (10)	$ 7	$ (8)
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Electric fuel and other energy-related purchases	Electric fuel and other energy-related purchases	Electric fuel and other energy-related purchases	Electric fuel and other energy-related purchases
Included in regulatory assets/liabilities	$ (77)	$ (174)	$ 230	$ (463)
Settlements	(40)	103	54	174
Purchases	2	0	30	16
Ending balance	269	(49)	269	(49)
Virginia Electric and Power Company
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	105	(3)	(116)	221
Total realized and unrealized gains (losses):
Included in earnings	$ 10	$ (107)	$ (136)	$ (195)
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Electric fuel and other energy-related purchases	Electric fuel and other energy-related purchases	Electric fuel and other energy-related purchases	Electric fuel and other energy-related purchases
Included in regulatory assets/liabilities	$ (7)	$ (176)	$ 219	$ (400)
Settlements	(17)	107	103	179
Purchases	0	0	21	16
Ending balance	91	(179)	91	(179)
Discontinued operations
Total realized and unrealized gains (losses):
Included in earnings	$ (3)	$ 1	$ (4)	$ 1

Fair Value Measurements (Financ

Fair Value Measurements (Financial Instruments' Carrying Amounts and Fair Values) (Detail) - USD ($) $ in Millions		Sep. 30, 2024	Dec. 31, 2023
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	[1]	$ 34,555	$ 42,526
Supplemental credit facility borrowings		0	450
Securitization bonds	[2]	1,282
Junior subordinated notes	[1]	2,666	1,388
Estimate of Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	[1],[3]	33,818	40,539
Supplemental credit facility borrowings		0	450
Securitization bonds	[2],[3]	1,315
Junior subordinated notes	[1],[3]	2,853	1,374
Virginia Electric and Power Company \| Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	[1]	19,221	17,392
Securitization bonds	[2]	1,282
Virginia Electric and Power Company \| Estimate of Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	[1],[3]	18,571	$ 16,418
Securitization bonds	[2],[3]	$ 1,315

[1] Carrying amount includes current portions included in securities due within one year and amounts which represent the unamortized debt issuance costs and discount or premium. There were no fair value hedges associated with fixed-rate debt at September 30, 2024 and December 31, 2023. Additionally, Dominion Energy carrying amounts include portions classified as current liabilities held for sale at December 31, 2023 . Carrying amount includes current portions included in securities due within one year. Fair value is estimated using market prices, where available, and interest rates currently available for issuance of debt with similar terms and remaining maturities. All fair value measurements are classified as Level 2. The carrying amount of debt issuances with short-term maturities and variable rates refinanced at current market rates is a reasonable estimate of their fair value.

Fair Value Measurements (Fina_2

Fair Value Measurements (Financial Instruments' Carrying Amounts and Fair Values) (Parenthetical) (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Supplemental line of credit facility borrowings expiration period	1 year
Valuation of certain fair value hedges associated with fixed rate debt	$ 0	$ 0

Derivatives and Hedge Account_3

Derivatives and Hedge Accounting Activities (Schedule of Offsetting Assets) (Detail) - USD ($) $ in Millions		Sep. 30, 2024	Dec. 31, 2023
Offsetting Assets [Line Items]
Gross Assets Presented in the Consolidated Balance Sheet	[1]	$ 999	$ 1,207
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		99	250
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral Received		0	15
Net Amounts		900	942
Virginia Electric and Power Company
Offsetting Assets [Line Items]
Gross Assets Presented in the Consolidated Balance Sheet	[1]	188	297
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		25	27
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral Received		0	0
Net Amounts		163	270
Commodity Contract \| Over-the-counter
Offsetting Assets [Line Items]
Gross Assets Presented in the Consolidated Balance Sheet	[1]	185	289
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		28	26
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral Received		0	0
Net Amounts		157	263
Commodity Contract \| Over-the-counter \| Virginia Electric and Power Company
Offsetting Assets [Line Items]
Gross Assets Presented in the Consolidated Balance Sheet	[1]	132	112
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		15	13
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral Received		0	0
Net Amounts		117	99
Commodity Contract \| Exchange
Offsetting Assets [Line Items]
Gross Assets Presented in the Consolidated Balance Sheet	[1]	104	118
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		46	33
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral Received		0	15
Net Amounts		58	70
Commodity Contract \| Exchange \| Virginia Electric and Power Company
Offsetting Assets [Line Items]
Gross Assets Presented in the Consolidated Balance Sheet	[1]	3	4
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		2	3
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral Received		0	0
Net Amounts		1	1
Interest Rate Contract \| Over-the-counter
Offsetting Assets [Line Items]
Gross Assets Presented in the Consolidated Balance Sheet	[1]	702	800
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		17	191
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral Received		0	0
Net Amounts		685	609
Interest Rate Contract \| Over-the-counter \| Virginia Electric and Power Company
Offsetting Assets [Line Items]
Gross Assets Presented in the Consolidated Balance Sheet	[1]	45	181
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		0	11
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral Received		0	0
Net Amounts		45	$ 170
Foreign currency exchange rate \| Over-the-counter
Offsetting Assets [Line Items]
Gross Assets Presented in the Consolidated Balance Sheet	[1]	8
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		8
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral Received		0
Net Amounts		0
Foreign currency exchange rate \| Over-the-counter \| Virginia Electric and Power Company
Offsetting Assets [Line Items]
Gross Assets Presented in the Consolidated Balance Sheet	[1]	8
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		8
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral Received		0
Net Amounts		$ 0

[1] Excludes derivative assets of $ 161 million and $ 143 million at Dominion Energy and $ 11 million and $ 1 million at Virginia Power at September 30, 2024 and December 31, 2023 , respectively, which are not subject to master netting or other similar arrangements.

Derivatives and Hedge Account_4

Derivatives and Hedge Accounting Activities (Schedule of Offsetting Assets) (Parenthetical) (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Offsetting Assets [Line Items]
Derivative assets, not subject to a master netting or similar arrangement	$ 161	$ 143
Virginia Electric and Power Company
Offsetting Assets [Line Items]
Derivative assets, not subject to a master netting or similar arrangement	$ 11	$ 1

Derivatives and Hedge Account_5

Derivatives and Hedge Accounting Activities (Schedule of Offsetting Liabilities) (Detail) - USD ($) $ in Millions		Sep. 30, 2024	Dec. 31, 2023
Offsetting Liabilities [Line Items]
Gross Liabilities Presented in the Consolidated Balance Sheet	[1]	$ 177	$ 697
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		99	250
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral		0	30
Net Amounts		78	417
Virginia Electric and Power Company
Offsetting Liabilities [Line Items]
Gross Liabilities Presented in the Consolidated Balance Sheet	[1]	75	240
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		25	27
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral		0	30
Net Amounts		50	183
Commodity Contract \| Over-the-counter
Offsetting Liabilities [Line Items]
Gross Liabilities Presented in the Consolidated Balance Sheet	[1]	59	266
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		28	26
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral		0	30
Net Amounts		31	210
Commodity Contract \| Over-the-counter \| Virginia Electric and Power Company
Offsetting Liabilities [Line Items]
Gross Liabilities Presented in the Consolidated Balance Sheet	[1]	21	153
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		15	13
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral		0	30
Net Amounts		6	110
Commodity Contract \| Exchange
Offsetting Liabilities [Line Items]
Gross Liabilities Presented in the Consolidated Balance Sheet	[1]	46	33
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		46	33
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral		0	0
Net Amounts		0	0
Commodity Contract \| Exchange \| Virginia Electric and Power Company
Offsetting Liabilities [Line Items]
Gross Liabilities Presented in the Consolidated Balance Sheet	[1]	2	3
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		2	3
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral		0	0
Net Amounts		0	0
Interest Rate Contract \| Over-the-counter
Offsetting Liabilities [Line Items]
Gross Liabilities Presented in the Consolidated Balance Sheet	[1]	20	359
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		17	186
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral		0	0
Net Amounts		3	173
Interest Rate Contract \| Over-the-counter \| Virginia Electric and Power Company
Offsetting Liabilities [Line Items]
Gross Liabilities Presented in the Consolidated Balance Sheet	[1]	0	45
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		0	6
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral		0	0
Net Amounts		0	39
Foreign currency exchange rate \| Over-the-counter
Offsetting Liabilities [Line Items]
Gross Liabilities Presented in the Consolidated Balance Sheet	[1]	52	39
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		8	5
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral		0	0
Net Amounts		44	34
Foreign currency exchange rate \| Over-the-counter \| Virginia Electric and Power Company
Offsetting Liabilities [Line Items]
Gross Liabilities Presented in the Consolidated Balance Sheet	[1]	52	39
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		8	5
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral		0	0
Net Amounts		$ 44	$ 34

[1] Excludes derivative liabilities of $ 4 million at Dominion Energy at September 30, 2024 and $ 37 million and $ 76 million at Virginia Power at September 30, 2024 and December 31, 2023 , respectively, which are not subject to master netting or similar arrangements. Dominion Energy did no t have any derivative liabilities at December 31, 2023 which were not subject to master netting or similar arrangements.

Derivatives and Hedge Account_6

Derivatives and Hedge Accounting Activities (Schedule of Offsetting Liabilities) (Parenthetical) (Detail) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Offsetting Liabilities [Line Items]
Derivative liabilities, not subject to a master netting or similar arrangement	$ 4,000,000	$ 0
Virginia Electric and Power Company
Offsetting Liabilities [Line Items]
Derivative liabilities, not subject to a master netting or similar arrangement	$ 37,000,000	$ 76,000,000

Derivatives and Hedge Account_7

Derivatives and Hedge Accounting Activities (Volume of Derivative Activity) (Detail) - 9 months ended Sep. 30, 2024 kr in Millions		USD ($) MWh Bcf	DKK (kr)	EUR (€)
Fixed Price - Natural Gas - Current Derivative Contract
Derivative [Line Items]
Volume of derivative activity	[1]	39
Fixed Price - Natural Gas - Current Derivative Contract \| Virginia Electric and Power Company
Derivative [Line Items]
Volume of derivative activity	[1]	38
Basis - Natural Gas - Current Derivative Contract
Derivative [Line Items]
Volume of derivative activity	[2]	167
Basis - Natural Gas - Current Derivative Contract \| Virginia Electric and Power Company
Derivative [Line Items]
Volume of derivative activity	[2]	157
Fixed Price - Electricity - Current Derivative Contract
Derivative [Line Items]
Volume of electricity \| MWh		18
Fixed Price - Electricity - Current Derivative Contract \| Virginia Electric and Power Company
Derivative [Line Items]
Volume of electricity \| MWh		9
Financial Transmission Rights - Electricity- Current Derivative Contract
Derivative [Line Items]
Volume of electricity \| MWh		72
Financial Transmission Rights - Electricity- Current Derivative Contract \| Virginia Electric and Power Company
Derivative [Line Items]
Volume of electricity \| MWh		72
Interest Rate - Current Derivative Contract
Derivative [Line Items]
Derivative payment \| $	[3]	$ 2,662,000,000
Interest Rate - Current Derivative Contract \| Virginia Electric and Power Company
Derivative [Line Items]
Derivative payment \| $	[3]	$ 0
Foreign Currency Exchange Rate - Current Derivative Contract
Derivative [Line Items]
Derivative payment	[3]		kr 1,829	€ 592,000,000
Foreign Currency Exchange Rate - Current Derivative Contract \| Virginia Electric and Power Company
Derivative [Line Items]
Derivative payment	[3]		1,829	592,000,000
Fixed Price - Natural Gas - Non-current Derivative Contract
Derivative [Line Items]
Volume of derivative activity	[1]	24
Fixed Price - Natural Gas - Non-current Derivative Contract \| Virginia Electric and Power Company
Derivative [Line Items]
Volume of derivative activity	[1]	24
Basis - Natural Gas - Non-current Derivative Contract
Derivative [Line Items]
Volume of derivative activity	[2]	328
Basis - Natural Gas - Non-current Derivative Contract \| Virginia Electric and Power Company
Derivative [Line Items]
Volume of derivative activity	[2]	328
Fixed Price - Electricity - Non-current Derivative Contract
Derivative [Line Items]
Volume of electricity \| MWh		33
Fixed Price - Electricity - Non-current Derivative Contract \| Virginia Electric and Power Company
Derivative [Line Items]
Volume of electricity \| MWh		2
Interest Rate - Non-current Derivative Contract
Derivative [Line Items]
Derivative payment \| $	[3]	$ 7,612,000,000
Interest Rate - Non-current Derivative Contract \| Virginia Electric and Power Company
Derivative [Line Items]
Derivative payment \| $	[3]	$ 1,050,000,000
Foreign Currency Exchange Rate - Non-current Derivative Contract
Derivative [Line Items]
Derivative payment	[3]		1,512	921,000,000
Foreign Currency Exchange Rate - Non-current Derivative Contract \| Virginia Electric and Power Company
Derivative [Line Items]
Derivative payment	[3]		kr 1,512	€ 921,000,000

[1] Includes options at Dominion Energy. Includes options. Maturity is determined based on final settlement period.

Derivatives and Hedge Account_8

Derivatives and Hedge Accounting Activities (Selected Information Related to Gains and Losses on Cash Flow Hedges Included in AOCI) (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Derivative Instruments Gain Loss [Line Items]
AOCI After-Tax	$ (190)
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax	(30)
Virginia Electric and Power Company
Derivative Instruments Gain Loss [Line Items]
AOCI After-Tax	17
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax	1
Interest Rate Contract
Derivative Instruments Gain Loss [Line Items]
AOCI After-Tax	(190)
Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax	$ (30)
Maximum Term	375 months
Interest Rate Contract \| Virginia Electric and Power Company
Derivative Instruments Gain Loss [Line Items]
AOCI After-Tax	$ 17
Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax	$ 1
Maximum Term	375 months

Derivatives and Hedge Account_9

Derivatives and Hedge Accounting Activities (Fair Value of Derivatives) (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Derivatives Fair Value [Line Items]
Total current derivative assets	$ 545	$ 753
Total noncurrent derivative assets	615	597
Total derivative assets	1,160	1,350
Total current derivative liabilities	107	376
Total noncurrent derivative liabilities	74	321
Total derivative liabilities	181	697
Virginia Electric and Power Company
Derivatives Fair Value [Line Items]
Total current derivative assets	135	234
Total noncurrent derivative assets	64	64
Total derivative assets	199	298
Total current derivative liabilities	80	244
Total noncurrent derivative liabilities	32	72
Total derivative liabilities	112	316
Commodity Contract
Derivatives Fair Value [Line Items]
Total current derivative assets	235	312
Total noncurrent derivative assets	215	238
Total current derivative liabilities	81	244
Total noncurrent derivative liabilities	28	55
Commodity Contract \| Virginia Electric and Power Company
Derivatives Fair Value [Line Items]
Total current derivative assets	130	91
Total noncurrent derivative assets	16	26
Total current derivative liabilities	54	188
Total noncurrent derivative liabilities	6	44
Interest Rate Contract
Derivatives Fair Value [Line Items]
Total current derivative assets	305	441
Total noncurrent derivative assets	397	359
Total current derivative liabilities	0	121
Total noncurrent derivative liabilities	20	238
Interest Rate Contract \| Virginia Electric and Power Company
Derivatives Fair Value [Line Items]
Total current derivative assets	0	143
Total noncurrent derivative assets	45	38
Total current derivative liabilities	0	45
Total noncurrent derivative liabilities	0	0
Foreign currency exchange rate
Derivatives Fair Value [Line Items]
Total current derivative assets	5
Total noncurrent derivative assets	3
Total current derivative liabilities	26	11
Total noncurrent derivative liabilities	26	28
Foreign currency exchange rate \| Virginia Electric and Power Company
Derivatives Fair Value [Line Items]
Total current derivative assets	5
Total noncurrent derivative assets	3
Total current derivative liabilities	26	11
Total noncurrent derivative liabilities	26	28
Designated as Hedging Instrument
Derivatives Fair Value [Line Items]
Total current derivative assets	0	143
Total noncurrent derivative assets	45	38
Total derivative assets	45	181
Total current derivative liabilities	0	45
Total noncurrent derivative liabilities	0	0
Total derivative liabilities	0	45
Designated as Hedging Instrument \| Virginia Electric and Power Company
Derivatives Fair Value [Line Items]
Total current derivative assets	0	143
Total noncurrent derivative assets	45	38
Total derivative assets	45	181
Total current derivative liabilities	0	45
Total noncurrent derivative liabilities	0	0
Total derivative liabilities	0	45
Designated as Hedging Instrument \| Commodity Contract
Derivatives Fair Value [Line Items]
Total current derivative assets	0	0
Total noncurrent derivative assets	0	0
Total current derivative liabilities	0	0
Total noncurrent derivative liabilities	0	0
Designated as Hedging Instrument \| Commodity Contract \| Virginia Electric and Power Company
Derivatives Fair Value [Line Items]
Total current derivative assets	0	0
Total noncurrent derivative assets	0	0
Total current derivative liabilities	0	0
Total noncurrent derivative liabilities	0	0
Designated as Hedging Instrument \| Interest Rate Contract
Derivatives Fair Value [Line Items]
Total current derivative assets	0	143
Total noncurrent derivative assets	45	38
Total current derivative liabilities	0	45
Total noncurrent derivative liabilities	0	0
Designated as Hedging Instrument \| Interest Rate Contract \| Virginia Electric and Power Company
Derivatives Fair Value [Line Items]
Total current derivative assets	0	143
Total noncurrent derivative assets	45	38
Total current derivative liabilities	0	45
Total noncurrent derivative liabilities	0	0
Designated as Hedging Instrument \| Foreign currency exchange rate
Derivatives Fair Value [Line Items]
Total current derivative assets	0
Total noncurrent derivative assets	0
Total current derivative liabilities	0	0
Total noncurrent derivative liabilities	0	0
Designated as Hedging Instrument \| Foreign currency exchange rate \| Virginia Electric and Power Company
Derivatives Fair Value [Line Items]
Total current derivative assets	0
Total noncurrent derivative assets	0
Total current derivative liabilities	0	0
Total noncurrent derivative liabilities	0	0
Fair Value - Derivatives not under Hedge Accounting
Derivatives Fair Value [Line Items]
Total current derivative assets	545	610
Total noncurrent derivative assets	570	559
Total derivative assets	1,115	1,169
Total current derivative liabilities	107	331
Total noncurrent derivative liabilities	74	321
Total derivative liabilities	181	652
Fair Value - Derivatives not under Hedge Accounting \| Virginia Electric and Power Company
Derivatives Fair Value [Line Items]
Total current derivative assets	135	91
Total noncurrent derivative assets	19	26
Total derivative assets	154	117
Total current derivative liabilities	80	199
Total noncurrent derivative liabilities	32	72
Total derivative liabilities	112	271
Fair Value - Derivatives not under Hedge Accounting \| Commodity Contract
Derivatives Fair Value [Line Items]
Total current derivative assets	235	312
Total noncurrent derivative assets	215	238
Total current derivative liabilities	81	244
Total noncurrent derivative liabilities	28	55
Fair Value - Derivatives not under Hedge Accounting \| Commodity Contract \| Virginia Electric and Power Company
Derivatives Fair Value [Line Items]
Total current derivative assets	130	91
Total noncurrent derivative assets	16	26
Total current derivative liabilities	54	188
Total noncurrent derivative liabilities	6	44
Fair Value - Derivatives not under Hedge Accounting \| Interest Rate Contract
Derivatives Fair Value [Line Items]
Total current derivative assets	305	298
Total noncurrent derivative assets	352	321
Total current derivative liabilities	0	76
Total noncurrent derivative liabilities	20	238
Fair Value - Derivatives not under Hedge Accounting \| Interest Rate Contract \| Virginia Electric and Power Company
Derivatives Fair Value [Line Items]
Total current derivative assets	0	0
Total noncurrent derivative assets	0	0
Total current derivative liabilities	0	0
Total noncurrent derivative liabilities	0	0
Fair Value - Derivatives not under Hedge Accounting \| Foreign currency exchange rate
Derivatives Fair Value [Line Items]
Total current derivative assets	5
Total noncurrent derivative assets	3
Total current derivative liabilities	26	11
Total noncurrent derivative liabilities	26	28
Fair Value - Derivatives not under Hedge Accounting \| Foreign currency exchange rate \| Virginia Electric and Power Company
Derivatives Fair Value [Line Items]
Total current derivative assets	5
Total noncurrent derivative assets	3
Total current derivative liabilities	26	11
Total noncurrent derivative liabilities	$ 26	$ 28

Derivatives and Hedge Accoun_10

Derivatives and Hedge Accounting Activities (Fair Value of Derivatives) (Parenthetical) (Detail) - Held for Sale $ in Millions	Dec. 31, 2023 USD ($)
Derivatives, Fair Value [Line Items]
Derivative asset held for sale, current	$ 54
Derivative liabilities held for sale, current	$ 30

Derivatives and Hedge Accoun_11

Derivatives and Hedge Accounting Activities (Gains and Losses on Derivatives in Cash Flow Hedging Relationships) (Detail) - Cash Flow Hedges - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives	[1]	$ (10)	$ 25	$ 2	$ 21
Amount of Gain (Loss) Reclassified From AOCI to Income		(11)	(11)	(33)	(32)
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	[2]	(110)	268	20	236
Virginia Electric and Power Company
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives	[1]	(10)	25	2	21
Amount of Gain (Loss) Reclassified From AOCI to Income		0	(1)	0	(1)
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	[2]	(109)	267	20	235
Interest Rate
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives	[1],[3]	(10)	25	2	21
Amount of Gain (Loss) Reclassified From AOCI to Income	[3]	(11)	(11)	(33)	(32)
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	[2],[3]	(110)	268	20	236
Interest Rate \| Virginia Electric and Power Company
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives	[1],[3]	(10)	25	2	21
Amount of Gain (Loss) Reclassified From AOCI to Income	[3]	0	(1)	0	(1)
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	[2],[3]	$ (109)	$ 267	$ 20	$ 235

[1] Amounts deferred into AOCI have no associated effect in the Companies’ Consolidated Statements of Income. Represents net derivative activity deferred into and amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in the Companies’ Consolidated Statements of Income. Amounts recorded in the Companies’ Consolidated Statements of Income are classified in interest and related charges.

Derivatives and Hedge Accoun_12

Derivatives and Hedge Accounting Activities (Schedule of Derivatives not Designated as Hedging Instruments) (Detail) - Derivatives Not Designated as Hedging Instruments - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	[1],[2]	$ 199	$ 125	$ (46)	$ 501
Virginia Electric and Power Company
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	[1],[2]	30	(145)	(81)	(243)
Commodity \| Operating Revenue
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	[1],[2]	123	7	184	428
Commodity \| Operating Revenue \| Virginia Electric and Power Company
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	[1],[2]	31	6	107	25
Commodity \| Electric Fuel and Other Energy-Related Purchases
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	[1],[2]	2	(149)	(188)	(267)
Commodity \| Electric Fuel and Other Energy-Related Purchases \| Virginia Electric and Power Company
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	[1],[2]	(1)	(151)	(188)	(270)
Commodity \| Operation and maintenance
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	[1],[2]	0	0	0	2
Commodity \| Operation and maintenance \| Virginia Electric and Power Company
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	[1],[2]	0	0	0	2
Commodity \| Discontinued operations
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	[1],[2]	0	(7)	0	17
Interest Rate Contract \| Discontinued operations
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	[1],[2]	(3)	0	(28)	94
Interest Rate Contract \| Interest And Related Charges
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	[1],[2]	$ 77	$ 274	$ (14)	$ 227

[1] Excludes amounts related to foreign currency exchange rate derivatives that are deferred to plant under construction within property, plant and equipment and regulatory assets/liabilities that will begin to amortize once the CVOW Commercial Project is placed in service. Includes derivative activity amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in the Companies’ Consolidated Statements of Income.

Investments (Narrative) (Detail

Investments (Narrative) (Detail) - USD ($)		3 Months Ended		9 Months Ended		12 Months Ended
Investments (Narrative) (Detail) - USD ($)		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023		Feb. 29, 2024
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from equity method investees					$ 7,000,000
Net earnings (losses) from discontinued operations including noncontrolling interest	[1]	$ 13,000,000	$ 541,000,000	$ (182,000,000)	92,000,000
Distributions received from investment				138,000,000	241,000,000
Equity method affiliates includes cash and accrued amounts of contributions				6,000,000	79,000,000
Current liabilities		0		0		$ 8,885,000,000	[2]
Contributions to equity method affiliates				14,000,000	79,000,000
Income tax expense (benefit) from discontinued operations		(10,000,000)	1,200,000,000	22,000,000	1,300,000,000
Investment company received distribution amount								$ 126,000,000
Discontinued operations
Schedule of Equity Method Investments [Line Items]
Net earnings (losses) from discontinued operations including noncontrolling interest				11,000,000	(235,000,000)
Atlantic Coast Pipeline
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from equity method investees			(1,000,000)	(12,000,000)	16,000,000
Contributions to equity method affiliates					70,000,000
Atlantic Coast Pipeline \| Other Current Liabilities
Schedule of Equity Method Investments [Line Items]
Current liabilities		10,000,000		10,000,000		4,000,000
Cove Point
Schedule of Equity Method Investments [Line Items]
Distributions received from investment			49,000,000		227,000,000
Discontinued operations, interest expense			69,000,000		120,000,000
Income tax expense (benefit) from discontinued operations			7,000,000		31,000,000
Cove Point \| Discontinued operations
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from equity method investees			$ 52,000,000		$ 218,000,000
Finite Lived Equity Method Investment Basis Difference
Schedule of Equity Method Investments [Line Items]
Carrying amount of investment that exceeded share of underlying equity		7,000,000		7,000,000		18,000,000
Equity method investment goodwill						9,000,000
Capitalized interest				7,000,000		3,000,000
Trading Securities
Schedule of Equity Method Investments [Line Items]
Rabbi trust securities		152,000,000		152,000,000		$ 119,000,000
Maximum
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from equity method investees				$ 1,000,000
Maximum \| Atlantic Coast Pipeline
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from equity method investees		$ (1,000,000)

[1] Includes income tax expense (benefit) of $( 10 ) million and $ 1.2 billion for the three months ended September 30, 2024 and 2023 , respectively, and $ 22 million and $ 1.3 billion for the nine months ended September 30, 2024 and 2023 , respectively. Dominion Energy’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date.

Investments (Equity and Fixed I

Investments (Equity and Fixed Income Securities, Insurance Contracts and Cash Equivalents in Decommissioning Trust Funds) (Detail) - USD ($) $ in Millions		9 Months Ended	12 Months Ended
		Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Fixed income securities Fair Value		$ 2,276
Cash equivalents and other, Amortized Cost	[1]	43	$ 84
Cash equivalents and other, Total Unrealized Gains	[1]	0	0
Cash equivalents and other, Total Unrealized Losses	[1]	0	0
Cash equivalents and other, Allowance for Credit Losses	[1]	0	0
Cash equivalents and other, Fair Value	[1]	43	84
Amortized Cost, Total		3,811	3,699
Total Unrealized Gains		4,240	3,308
Total Unrealized Losses	[2]	(34)	(61)
Allowance for Credit Losses, Total		0	0
Fair Value, Total		8,017	6,946	[3]
Net assets related to pending sales of securities		21	49
Fair value of securities in an unrealized loss position		474	764
Virginia Electric and Power Company
Debt Securities, Available-for-Sale [Line Items]
Fixed income securities Fair Value		1,359
Cash equivalents and other, Amortized Cost	[1]	13	47
Cash equivalents and other, Total Unrealized Gains	[1]	0	0
Cash equivalents and other, Total Unrealized Losses	[1]	0	0
Cash equivalents and other, Allowance for Credit Losses	[1]	0	0
Cash equivalents and other, Fair Value	[1]	13	47
Amortized Cost, Total		2,088	2,033
Total Unrealized Gains		2,201	1,726
Total Unrealized Losses	[2]	(23)	(43)
Allowance for Credit Losses, Total		0	0
Fair Value, Total		4,266	3,716	[4]
Net assets related to pending sales of securities		11	27
Fair value of securities in an unrealized loss position		262	384
Corporate Debt Fixed Income Securities
Debt Securities, Available-for-Sale [Line Items]
Fixed income securities Amortized Cost, Total	[5]	569	508
Fixed income securities Total Unrealized Gains	[5]	17	10
Fixed income securities Total Unrealized Losses	[5]	(17)	(27)
Fixed income securities Allowance for Credit Losses	[5]	0	0
Fixed income securities Fair Value	[5]	569	491
Corporate Debt Fixed Income Securities \| Virginia Electric and Power Company
Debt Securities, Available-for-Sale [Line Items]
Fixed income securities Amortized Cost, Total	[5]	357	292
Fixed income securities Total Unrealized Gains	[5]	8	3
Fixed income securities Total Unrealized Losses	[5]	(14)	(21)
Fixed income securities Allowance for Credit Losses	[5]	0	0
Fixed income securities Fair Value	[5]	351	274
Government Debt Fixed Income Securities
Debt Securities, Available-for-Sale [Line Items]
Fixed income securities Amortized Cost, Total	[5]	1,549	1,426
Fixed income securities Total Unrealized Gains	[5]	42	28
Fixed income securities Total Unrealized Losses	[5]	(15)	(24)
Fixed income securities Allowance for Credit Losses	[5]	0	0
Fixed income securities Fair Value	[5]	1,576	1,430
Government Debt Fixed Income Securities \| Virginia Electric and Power Company
Debt Securities, Available-for-Sale [Line Items]
Fixed income securities Amortized Cost, Total	[5]	894	811
Fixed income securities Total Unrealized Gains	[5]	25	17
Fixed income securities Total Unrealized Losses	[5]	(7)	(12)
Fixed income securities Allowance for Credit Losses	[5]	0	0
Fixed income securities Fair Value	[5]	912	816
Other
Debt Securities, Available-for-Sale [Line Items]
Fixed income securities Amortized Cost, Total	[5]	131
Fixed income securities Total Unrealized Gains	[5]	0
Fixed income securities Total Unrealized Losses	[5]	0
Fixed income securities Allowance for Credit Losses	[5]	0
Fixed income securities Fair Value	[5]	131
Other \| Virginia Electric and Power Company
Debt Securities, Available-for-Sale [Line Items]
Fixed income securities Amortized Cost, Total	[5]	96
Fixed income securities Total Unrealized Gains	[5]	0
Fixed income securities Total Unrealized Losses	[5]	0
Fixed income securities Allowance for Credit Losses	[5]	0
Fixed income securities Fair Value	[5]	96
Insurance Contracts
Debt Securities, Available-for-Sale [Line Items]
Fixed income securities Amortized Cost, Total	[5]	252	244
Fixed income securities Total Unrealized Gains	[5]	0	0
Fixed income securities Total Unrealized Losses	[5]	0	0
Fixed income securities Fair Value	[5]	252	244
U.S.
Debt Securities, Available-for-Sale [Line Items]
Equity securities Amortized Cost	[6]	1,267	1,276
Equity securities Total Unrealized Gains	[6]	4,181	3,270
Equity securities Total Unrealized Losses	[6]	(2)	(10)
Equity securities Fair Value	[6]	5,446	4,536
U.S. \| Virginia Electric and Power Company
Debt Securities, Available-for-Sale [Line Items]
Equity securities Amortized Cost	[6]	728	759
Equity securities Total Unrealized Gains	[6]	2,168	1,706
Equity securities Total Unrealized Losses	[6]	(2)	(10)
Equity securities Fair Value	[6]	2,894	2,455
Common/collective trust funds \| Fixed Income
Debt Securities, Available-for-Sale [Line Items]
Fixed income securities Amortized Cost, Total	[5]	0	161
Fixed income securities Total Unrealized Gains	[5]	0	0
Fixed income securities Total Unrealized Losses	[5]	0	0
Fixed income securities Allowance for Credit Losses	[5]	0	0
Fixed income securities Fair Value	[5]	0	161
Common/collective trust funds \| Fixed Income \| Virginia Electric and Power Company
Debt Securities, Available-for-Sale [Line Items]
Fixed income securities Amortized Cost, Total	[5]	0	124
Fixed income securities Total Unrealized Gains	[5]	0	0
Fixed income securities Total Unrealized Losses	[5]	0	0
Fixed income securities Allowance for Credit Losses	[5]	0	0
Fixed income securities Fair Value	[5]	$ 0	$ 124

[1] Dominion Energy includes pending sales of securities of $ 21 million and $ 49 million at September 30, 2024 and December 31, 2023 , respectively. Virginia Power includes pending sales of securities of $ 11 million and $ 27 million at September 30, 2024, and December 31, 2023 , respectively. Dominion Energy’s fair value of securities in an unrealized loss position was $ 474 million and $ 764 million at September 30, 2024 and December 31, 2023 , respectively. Virginia Power’s fair value of securities in an unrealized loss position was $ 262 million and $ 384 million at September 30, 2024 and December 31, 2023 , respectively. Dominion Energy’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. Virginia Power’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. Unrealized gains and losses on fixed income securities are included in AOCI and the nuclear decommissioning trust regulatory liability. Changes in allowance for credit losses are included in other income (expense). Unrealized gains and losses on equity securities are included in other income (expense) and the nuclear decommissioning trust regulatory liability.

Investments (Portion of Unreali

Investments (Portion of Unrealized Gains and Losses Relates to Equity Securities) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Securities, Available-for-Sale [Line Items]
Net gains (losses) recognized during the period		$ 282	$ (150)	$ 919	$ 370
Less: Net (gains) losses recognized during the period on securities sold during the period		5	1	1	4
Unrealized gains (losses) recognized during the period on securities still held at period end	[1]	287	(149)	920	374
Virginia Electric and Power Company
Debt Securities, Available-for-Sale [Line Items]
Net gains (losses) recognized during the period		145	(80)	473	189
Less: Net (gains) losses recognized during the period on securities sold during the period		3	(1)	(2)	2
Unrealized gains (losses) recognized during the period on securities still held at period end	[1]	$ 148	$ (81)	$ 471	$ 191

[1] Included in other income (expense) and the nuclear decommissioning trust regulatory liability.

Investments (Fair Value of Fixe

Investments (Fair Value of Fixed Income Securities by Contractual Maturity) (Detail) $ in Millions	Sep. 30, 2024 USD ($)
Schedule of Held-to-maturity Securities [Line Items]
Due in one year or less	$ 27
Due after one year through five years	572
Due after five years through ten years	459
Due after ten years	1,218
Total	2,276
Virginia Electric and Power Company
Schedule of Held-to-maturity Securities [Line Items]
Due in one year or less	18
Due after one year through five years	299
Due after five years through ten years	273
Due after ten years	769
Total	$ 1,359

Investments (Selected Informati

Investments (Selected Information Regarding Equity and Fixed Income Securities) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales		$ 651	$ 869	$ 2,230	$ 2,007
Realized gains	[1]	18	5	77	48
Realized losses	[1]	21	33	93	110
Virginia Electric and Power Company
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales		297	535	1,370	1,254
Realized gains	[1]	13	4	52	29
Realized losses	[1]	$ 16	$ 16	$ 61	$ 61

[1] Includes realized gains and losses recorded to the nuclear decommissioning trust regulatory liability.

Property, Plant and Equipment (

Property, Plant and Equipment (Narrative) (Detail)	1 Months Ended			3 Months Ended				9 Months Ended
Property, Plant and Equipment (Narrative) (Detail)	Oct. 31, 2024 USD ($)	Jul. 31, 2024 USD ($) a mi MW	Feb. 29, 2024 USD ($)	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)
Property, Plant and Equipment [Line Items]
Impairment of assets and other charges				$ 122,000,000		$ 1,000,000		$ 219,000,000	$ 136,000,000
Minimum
Property, Plant and Equipment [Line Items]
Additional capital contribution percentage			67%
Maximum
Property, Plant and Equipment [Line Items]
Additional capital contribution percentage			83%
Corporate Office Building
Property, Plant and Equipment [Line Items]
Proceeds from sale of property, plant and equipment					$ 23,000,000
Level 3 \| Corporate Office Building
Property, Plant and Equipment [Line Items]
Long-lived assets, estimated fair value					23,000,000		$ 35,000,000
Level 3 \| Nonregulated renewable natural gas facilities \| Minimum
Property, Plant and Equipment [Line Items]
Long-lived assets, estimated fair value				1,000,000	1,000,000			$ 1,000,000
Impairment of Assets and Other Charges \| Corporate Office Building
Property, Plant and Equipment [Line Items]
Impairment of assets and other charges					17,000,000		91,000,000
Asset impairment charges after tax					12,000,000		$ 68,000,000
Impairment of Assets and Other Charges \| Nonregulated renewable natural gas facilities
Property, Plant and Equipment [Line Items]
Impairment of assets and other charges				27,000,000	33,000,000
Asset impairment charges after tax				21,000,000	$ 25,000,000
Acquisition of Wind Project
Property, Plant and Equipment [Line Items]
Offshore wind project price expected		$ 160,000,000
Acquisition of Solar Project Foxhound Virginia
Property, Plant and Equipment [Line Items]
Date Agreement Entered								2023-03
Date Agreement Closed								February 2024
Date of Commercial Operations								April 2024
Acquisition Of Offshore Wind Project
Property, Plant and Equipment [Line Items]
Date Agreement Entered								2024-07
Date Agreement Closed								October 2024
Miles of area acquired \| mi		27
Acres of area acquired \| a		40,000
Power generating capacity \| MW		800
CVOW Commercial Project Excluding Financing Costs \| Subsequent Event
Property, Plant and Equipment [Line Items]
Total project costs	$ 9,800,000,000
CVOW Commercial Project Excluding Financing Costs Condition Two \| Maximum \| Subsequent Event
Property, Plant and Equipment [Line Items]
Total project costs	$ 11,300,000,000
Virginia Power and Stonepeak \| Maximum
Property, Plant and Equipment [Line Items]
Total project costs			$ 11,300,000,000
Virginia Power and Stonepeak \| CVOW Commercial Project
Property, Plant and Equipment [Line Items]
Remaining capital percentage			50%
Virginia Electric and Power Company \| Subsequent Event
Property, Plant and Equipment [Line Items]
Percentage of proceeds from sale of non controlling interests in CVOW commercial project	50%
Virginia Electric and Power Company \| Minimum
Property, Plant and Equipment [Line Items]
Total project costs			$ 13,700,000,000
Virginia Electric and Power Company \| Impairment of Assets and Other Charges
Property, Plant and Equipment [Line Items]
Impairment of assets and other charges				25,000,000
Asset impairment charges after tax				$ 18,000,000
Virginia Electric and Power Company \| CVOW Commercial Project
Property, Plant and Equipment [Line Items]
Ownership percentage			50%
Virginia Electric and Power Company \| CVOW Commercial Project \| Minimum \| Subsequent Event
Property, Plant and Equipment [Line Items]
Initial withholding amount	$ 145,000,000
Virginia Electric and Power Company \| CVOW Commercial Project Excluding Financing Costs \| Subsequent Event
Property, Plant and Equipment [Line Items]
Initial withholding amount	100,000,000
Virginia Electric and Power Company \| CVOW Commercial Project Excluding Financing Costs Condition Two \| Subsequent Event
Property, Plant and Equipment [Line Items]
Proceeds from sale of non controlling interests in CVOW commercial project	$ 2,600,000,000
Stonepeak \| Minimum
Property, Plant and Equipment [Line Items]
Total project costs			$ 11,300,000,000
Stonepeak \| Maximum
Property, Plant and Equipment [Line Items]
Total project costs			13,700,000,000
Additional capital costs			$ 11,300,000,000

Regulatory Assets and Liabili_3

Regulatory Assets and Liabilities (Schedule of Regulatory Assets) (Detail) - USD ($) $ in Millions		1 Months Ended	9 Months Ended
		Feb. 29, 2024	Sep. 30, 2024	Dec. 31, 2023
Regulatory Assets [Line Items]
Regulatory assets-current	[1]		$ 1,030	$ 1,309	[2]
Regulatory assets-noncurrent	[1]		8,352	8,356	[2]
Total regulatory assets			9,382	9,665
Virginia Electric and Power Company
Regulatory Assets [Line Items]
Regulatory assets-current	[3]		751	868	[4]
Regulatory assets-noncurrent	[3]		4,561	4,317	[4]
Total regulatory assets			$ 5,312	5,185
Estimated under-recovered balances		$ 1,300
Weighted Average
Regulatory Assets [Line Items]
Weighted average useful life			25 years
Weighted Average \| Virginia Electric and Power Company
Regulatory Assets [Line Items]
Weighted average useful life			24 years
SCANA
Regulatory Assets [Line Items]
Electric service customers over period			20 years
Derivatives
Regulatory Assets [Line Items]
Regulatory assets-noncurrent	[5]		$ 80	107
Derivatives \| Virginia Electric and Power Company
Regulatory Assets [Line Items]
Regulatory assets-noncurrent	[5]		41	66
Deferred cost of fuel used in electric generation
Regulatory Assets [Line Items]
Regulatory assets-current	[6]		35	245
Regulatory assets-noncurrent	[6]		0	1,221
Deferred cost of fuel used in electric generation \| Virginia Electric and Power Company
Regulatory Assets [Line Items]
Regulatory assets-current	[6]		10	95
Regulatory assets-noncurrent	[6]		0	1,221
Securitized cost of fuel used in electric generation
Regulatory Assets [Line Items]
Regulatory assets-current	[7]		119	0
Regulatory assets-noncurrent	[7]		1,081
Securitized cost of fuel used in electric generation \| Virginia Electric and Power Company
Regulatory Assets [Line Items]
Regulatory assets-current	[7]		119	0
Regulatory assets-noncurrent	[7]		1,081
Deferred rider costs for Virginia electric utility
Regulatory Assets [Line Items]
Regulatory assets-current	[8]		328	270
Regulatory assets-noncurrent	[8]		680	496
Deferred rider costs for Virginia electric utility \| Virginia Electric and Power Company
Regulatory Assets [Line Items]
Regulatory assets-current	[8]		328	270
Regulatory assets-noncurrent	[8]		680	496
Ash pond and landfill closure costs
Regulatory Assets [Line Items]
Regulatory assets-current	[9]		$ 111	200
Regulatory assets expected collection period commencing year			2021
Ash pond and landfill closure costs \| Virginia Electric and Power Company
Regulatory Assets [Line Items]
Regulatory assets-current	[9]		$ 111	200
Ash pond and landfill closure costs \| Maximum
Regulatory Assets [Line Items]
Regulatory assets amounts expected collection period			18 years
Ash pond and landfill closure costs \| Minimum
Regulatory Assets [Line Items]
Regulatory assets amounts expected collection period			15 years
Deferred nuclear refueling outage costs
Regulatory Assets [Line Items]
Regulatory assets-current	[10]		$ 67	63
Deferred nuclear refueling outage costs \| Virginia Electric and Power Company
Regulatory Assets [Line Items]
Regulatory assets-current	[10]		67	63
NND Project Costs
Regulatory Assets [Line Items]
Regulatory assets-current	[11]		138	138
Regulatory assets-noncurrent	[11]		1,845	1,949
CCR Remediation, Ash Pond and Landfill Closure Cost
Regulatory Assets [Line Items]
Regulatory assets-noncurrent	[9]		2,965	2,410
CCR Remediation, Ash Pond and Landfill Closure Cost \| Virginia Electric and Power Company
Regulatory Assets [Line Items]
Regulatory assets-noncurrent	[9]		2,645	2,407
Derivatives
Regulatory Assets [Line Items]
Regulatory assets-current	[5]		31	162
Derivatives \| Virginia Electric and Power Company
Regulatory Assets [Line Items]
Regulatory assets-current	[5]		29	160
Other
Regulatory Assets [Line Items]
Regulatory assets-current			201	231
Regulatory assets-noncurrent			656	590
Other \| Virginia Electric and Power Company
Regulatory Assets [Line Items]
Regulatory assets-current			87	80
Regulatory assets-noncurrent			114	127
Unrecognized Pension and Other Postretirement Benefit Costs
Regulatory Assets [Line Items]
Regulatory assets-noncurrent	[12]		486	1,036
Unrecognized Pension and Other Postretirement Benefit Costs \| Virginia Electric and Power Company
Regulatory Assets [Line Items]
Regulatory assets-noncurrent	[12]		0	0
Unrecognized Pension and Other Postretirement Benefit Costs \| East Ohio, PSNC and Questar Gas
Regulatory Assets [Line Items]
Regulatory assets-noncurrent				215
Interest rate hedges
Regulatory Assets [Line Items]
Regulatory assets-noncurrent	[13]		167	168
Interest rate hedges \| Virginia Electric and Power Company
Regulatory Assets [Line Items]
Regulatory assets-noncurrent	[13]		0	0
AROs and related funding
Regulatory Assets [Line Items]
Regulatory assets-noncurrent	[14]		$ 392	$ 379
Amortization period for deferred costs			105 years
Deferred Project Costs \| Maximum
Regulatory Assets [Line Items]
Amortization period for deferred costs			18 months

[1] See Note 15 for amounts attributable to VIEs. Dominion Energy’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. See Note 15 for amounts attributable to VIEs. Virginia Power’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. Represents changes in the fair value of derivatives, excluding separately presented interest rate hedges, that following settlement are expected to be recovered from or refunded to customers. Reflects deferred fuel expenses for the Virginia and North Carolina jurisdictions of Virginia Power’s electric generation operations. Additionally, Dominion Energy includes deferred fuel expenses for the South Carolina jurisdiction of its electric generation operations. In February 2024, Virginia Power completed a securitization of $ 1.3 billion of under-recovered fuel costs for its Virginia service territory. Reflects under-recovered fuel costs for Virginia Power’s Virginia service territory securitized through the issuance of bonds by VPFS in February 2024. See Note 15 in this report and Notes 13 and 18 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023 for additional information. Reflects deferrals under Virginia Power’s electric transmission FERC formula rate and the deferral of costs associated with certain current and prospective rider projects. Primarily reflects legislation in Virginia which requires any CCR asset located at certain Virginia Power stations to be closed by removing the CCR to an approved landfill or through beneficial reuse. These deferred costs are expected to be collected over a period between 15 and 18 years commencing December 2021 through Rider CCR. Virginia Power is entitled to collect carrying costs on uncollected expenditures once expenditures have been made. In addition, the balance at September 30, 2024 reflects amounts related to the EPA’s May 2024 final rule concerning CCR as discussed in Note 2. Legislation in Virginia requires Virginia Power to defer operation and maintenance costs incurred in connection with the refueling of any nuclear-powered generating plant. These deferred costs will be amortized over the refueling cycle, not to exceed 18 months. Reflects expenditures by DESC associated with the NND Project, which pursuant to the SCANA Merger Approval Order, will be recovered from DESC electric service customers over a 20 -year period ending in 2039. Represents unrecognized pension and other postretirement employee benefit costs expected to be recovered or refunded through future rates generally over the expected remaining service period of plan participants by certain of Dominion Energy’s rate-regulated subsidiaries. Includes regulatory assets of $ 215 million and regulatory liabilities of $ 12 million at December 31, 2023 related to retained pension and other postretirement benefit plan assets and obligations for the East Ohio, Questar Gas and PSNC Transactions reclassified to AOCI upon closing of each transaction. Reflects interest rate hedges recoverable from or refundable to customers. Certain of these instruments are settled and any related payments are being amortized into interest expense over the life of the related debt, which has a weighted-average useful life of approximately 25 years and 24 years for Dominion Energy and Virginia Power, respectively, as of September 30, 2024 . Represents uncollected costs, including deferred depreciation and accretion expense, related to legal obligations associated with the future retirement of generation, transmission and distribution properties. The AROs primarily relate to DESC’s electric generating facilities, including Summer, and are expected to be recovered over the related property lives and periods of decommissioning which may range up to approximately 105 years .

Regulatory Assets and Liabili_4

Regulatory Assets and Liabilities (Schedule of Regulatory Liabilities) (Detail) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2024	Dec. 31, 2023
Regulatory Liabilities [Line Items]
Regulatory liabilities-current		$ 714	$ 522	[1]
Regulatory liabilities-noncurrent		8,995	8,674	[1]
Total regulatory liabilities		9,709	9,196
Virginia Electric and Power Company
Regulatory Liabilities [Line Items]
Regulatory liabilities-current		516	321	[2]
Regulatory liabilities-noncurrent		6,395	5,978	[2]
Total regulatory liabilities		$ 6,911	6,299
SCANA
Regulatory Liabilities [Line Items]
Estimation period of collection to be credited		11 years
Electric service customers over period		20 years
Deferred cost of fuel used in electric generation
Regulatory Liabilities [Line Items]
Regulatory liabilities-current	[3]	$ 166	0
Deferred cost of fuel used in electric generation \| Virginia Electric and Power Company
Regulatory Liabilities [Line Items]
Regulatory liabilities-current	[3]	166	0
Provision for future cost of removal and AROs
Regulatory Liabilities [Line Items]
Regulatory liabilities-current	[4]	118	118
Regulatory liabilities-noncurrent	[4]	1,842	1,818
Provision for future cost of removal and AROs \| Virginia Electric and Power Company
Regulatory Liabilities [Line Items]
Regulatory liabilities-current	[4]	118	118
Regulatory liabilities-noncurrent	[4]	1,207	1,185
Reserve for refunds and rate credits to electric utility customers
Regulatory Liabilities [Line Items]
Regulatory liabilities-current	[5]	77	83
Regulatory liabilities-noncurrent	[5]	181	237
Reserve for refunds and rate credits to electric utility customers \| Virginia Electric and Power Company
Regulatory Liabilities [Line Items]
Regulatory liabilities-current	[5]	0	0
Regulatory liabilities-noncurrent	[5]	0	0
Income taxes refundable through future rates
Regulatory Liabilities [Line Items]
Regulatory liabilities-current	[6]	107	107
Regulatory liabilities-noncurrent	[6]	2,980	3,076
Income taxes refundable through future rates \| Virginia Electric and Power Company
Regulatory Liabilities [Line Items]
Regulatory liabilities-current	[6]	70	70
Regulatory liabilities-noncurrent	[6]	2,170	2,237
Monetization of guarantee settlement
Regulatory Liabilities [Line Items]
Regulatory liabilities-current	[7]	67	67
Regulatory liabilities-noncurrent	[7]	$ 585	635
Electric service customers over period		20 years
Derivatives
Regulatory Liabilities [Line Items]
Regulatory liabilities-current	[8]	$ 77	7
Regulatory liabilities-noncurrent	[8]	151	136
Derivatives \| Virginia Electric and Power Company
Regulatory Liabilities [Line Items]
Regulatory liabilities-current	[8]	60	0
Regulatory liabilities-noncurrent	[8]	5	0
Other
Regulatory Liabilities [Line Items]
Regulatory liabilities-current		102	140
Regulatory liabilities-noncurrent		303	286
Other \| Virginia Electric and Power Company
Regulatory Liabilities [Line Items]
Regulatory liabilities-current		102	133
Regulatory liabilities-noncurrent		236	225
Nuclear decommissioning trust
Regulatory Liabilities [Line Items]
Regulatory liabilities-noncurrent	[9]	2,537	2,098
Nuclear decommissioning trust \| Virginia Electric and Power Company
Regulatory Liabilities [Line Items]
Regulatory liabilities-noncurrent	[9]	2,537	2,098
Interest rate hedges
Regulatory Liabilities [Line Items]
Regulatory liabilities-noncurrent	[10]	240	233
Interest rate hedges \| Virginia Electric and Power Company
Regulatory Liabilities [Line Items]
Regulatory liabilities-noncurrent	[10]	240	233
Unrecognized Pension and Other Postretirement Benefit Costs \| East Ohio, PSNC and Questar Gas
Regulatory Liabilities [Line Items]
Regulatory liabilities			12
Overrecovered Other Postretirement Benefit Costs
Regulatory Liabilities [Line Items]
Regulatory liabilities-noncurrent	[11]	$ 176	$ 155

[1] Dominion Energy’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. Virginia Power’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. Reflects deferred fuel expenses for the Virginia and North Carolina jurisdictions of Virginia Power’s electric generation operations. Additionally, Dominion Energy includes deferred fuel expenses for the South Carolina jurisdiction of its electric generation operations. In February 2024, Virginia Power completed a securitization of $ 1.3 billion of under-recovered fuel costs for its Virginia service territory. Rates charged to customers by Dominion Energy and Virginia Power’s regulated businesses include a provision for the cost of future activities to remove assets that are expected to be incurred at the time of retirement. Reflects amounts previously collected from retail electric customers of DESC for the NND Project to be credited over an estimated 11 -year period effective February 2019, in connection with the SCANA Merger Approval Order. Also reflects amounts to be refunded to jurisdictional retail electric customers in Virginia associated with the settlement of the 2021 Triennial Review. See Note 13 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023 for additional information. Amounts recorded to pass the effect of reduced income taxes from the 2017 Tax Reform Act to customers in future periods, which will primarily reverse at the weighted average tax rate that was used to build the reserves over the remaining book life of the property, net of amounts to be recovered through future rates to pay income taxes that become payable when rate revenue is provided to recover AFUDC equity. Reflects amounts to be refunded to DESC electric service customers over a 20 -year period ending in 2039 associated with the monetization of a bankruptcy settlement agreement. Represents changes in the fair value of derivatives, excluding separately presented interest rate hedges, that following settlement are expected to be recovered from or refunded to customers. Primarily reflects a regulatory liability representing amounts collected from Virginia jurisdictional customers and placed in external trusts (including income, losses and changes in fair value thereon, as applicable) for the future decommissioning of Virginia Power’s utility nuclear generation stations, in excess of the related AROs. Reflects interest rate hedges recoverable from or refundable to customers. Certain of these instruments are settled and any related payments are being amortized into interest expense over the life of the related debt, which has a weighted-average useful life of approximately 25 years and 24 years for Dominion Energy and Virginia Power, respectively, as of September 30, 2024 . Reflects a regulatory liability for the collection of postretirement benefit costs allowed in rates in excess of expense incurred.

Regulatory Assets and Liabili_5

Regulatory Assets and Liabilities (Narrative) (Detail) $ in Billions	Sep. 30, 2024 USD ($)
Public Utilities General Disclosures [Line Items]
Regulatory assets not expect to earn return	$ 6.1
Period for which expenditures are expected to be recovered	2 years
Virginia Electric and Power Company
Public Utilities General Disclosures [Line Items]
Regulatory assets not expect to earn return	$ 4.5

Regulatory Matters (Narrative)

Regulatory Matters (Narrative) (Detail) $ in Millions

1 Months Ended

2 Months Ended

3 Months Ended

9 Months Ended

Oct. 31, 2024 USD ($) MW

Sep. 30, 2024 USD ($)

Jul. 31, 2024 USD ($)

Jun. 30, 2024 USD ($) Bcf / d

May 31, 2024 USD ($)

Mar. 31, 2024 USD ($) mi kV

Feb. 29, 2024 USD ($)

Jan. 31, 2024 USD ($)

Nov. 30, 2023 USD ($)

Oct. 31, 2023 USD ($) Project MW

Jul. 31, 2023 USD ($)

May 31, 2023 USD ($)

Jun. 30, 2024 USD ($)

Sep. 30, 2024 USD ($)

Mar. 31, 2024 USD ($)

Sep. 30, 2024 USD ($)

Dec. 31, 2024 USD ($)

Maximum | Subsequent Event

Public Utilities General Disclosures [Line Items]

Capacity expenses expected to be incurred with PJM

$ 145

Virginia Regulation

Public Utilities General Disclosures [Line Items]

Percentage of earned return

9.04%

Authorized return percentage

9.35%

Virginia Regulation | Annual Fuel Factor | Securitization Option

Public Utilities General Disclosures [Line Items]

Increase (decrease) in revenue requirement

$ 541

North Carolina Regulation

Public Utilities General Disclosures [Line Items]

Application date

2024-03

North Carolina Regulation | Rider DSM

Public Utilities General Disclosures [Line Items]

Increase (Decrease) in customer usage tracker

$ 31

North Carolina Regulation | Virginia Power Base Rate Case

Public Utilities General Disclosures [Line Items]

Increase(Decrease) in gas cost

$ 57

Percentage of earned return

5.01%

Percentage of proposed earned return

10.60%

Authorized return percentage

9.75%

North Carolina Regulation | Virginia Power Base Rate Case | Subsequent Event

Public Utilities General Disclosures [Line Items]

Increase(Decrease) in gas cost

$ 37

Authorized return percentage

9.95%

North Carolina Regulation | Virginia Power Fuel Filing | Subsequent Event

Public Utilities General Disclosures [Line Items]

Increase (Decrease) In fuel component of electric rates

$ 107

South Carolina Regulation

Public Utilities General Disclosures [Line Items]

Materials and supplies inventory write down

$ 50

Impairment of assets and other charges (benefits)

Impairment of assets and other charges (benefits) after tax

$ 44

South Carolina Regulation | Forecast

Public Utilities General Disclosures [Line Items]

One-time bill credit

$ 7

South Carolina Regulation | Electric Base Rate Case

Public Utilities General Disclosures [Line Items]

Increase (decrease) in revenue requirement

$ 219

Approved return on equity percentage

9.94%

Percentage of earned return

4.32%

Percentage of proposed earned return

10.60%

Authorized return percentage

9.50%

Virginia Electric and Power Company

Public Utilities General Disclosures [Line Items]

Estimated under-recovered balances

$ 1,300

Virginia Electric and Power Company | Impairment of Assets and Other Charges

Public Utilities General Disclosures [Line Items]

Impairment of assets and other charges (benefits)

$ (17)

Impairment of assets and other charges (benefits) after tax

(12)

Virginia Electric and Power Company | Annual Fuel Factor

Public Utilities General Disclosures [Line Items]

Increase (decrease) in revenue requirement

$ (13)

Virginia Electric and Power Company | Utility Scale Solar

Public Utilities General Disclosures [Line Items]

Proposed cost of project

$ 850

Number of utility-scale projects | Project

Targeted capacity provided by legislation | MW

329

Virginia Electric and Power Company | Utility Scale Solar | Subsequent Event

Public Utilities General Disclosures [Line Items]

Proposed cost of project

$ 605

Targeted capacity provided by legislation | MW

208

Virginia Electric and Power Company | Virginia LNG Storage Facility

Public Utilities General Disclosures [Line Items]

Liquefied equivalent | Bcf / d

Regasify storage capacity

25%

Liquefy storage capacity

Facility expected cost, excluding financing costs

$ 550

Virginia Electric and Power Company | Virginia Regulation

Public Utilities General Disclosures [Line Items]

Public utilities event costs to be recovered

$ 45

One-time credits to customers

$ 15

Authorized return percentage

9.70%

Capitalization ratio

52.10%

Virginia Electric and Power Company | Virginia Regulation | Base Rate Case

Public Utilities General Disclosures [Line Items]

Total revenue requirement

$ 350

Virginia Electric and Power Company | Virginia Regulation | Annual Fuel Factor

Public Utilities General Disclosures [Line Items]

Total revenue requirement

$ 2,200

$ 2,300

Rate year beginning

2024-07

2023-07

Increase (decrease) in revenue requirement

$ 636

Estimated under-recovered balances

$ 1,300

Estimated over-recovered balances

$ 266

Virginia Electric and Power Company | Virginia Regulation | Annual Fuel Factor | Securitization Option

Public Utilities General Disclosures [Line Items]

Estimated under-recovered balances

$ 1,300

Virginia Electric and Power Company | Virginia Regulation | Generation And Distribution Services

Public Utilities General Disclosures [Line Items]

Authorized return percentage

9.05%

Virginia Electric and Power Company | Biennial Review

Public Utilities General Disclosures [Line Items]

Authorized return percentage

0.70%

Dominion Energy South Carolina Inc | South Carolina Regulation | Electric DSM Programs

Public Utilities General Disclosures [Line Items]

Public energy efficiency programs cost rate adjustment approval request to recover amount

$ 47

Dominion Energy South Carolina Inc | South Carolina Regulation | Cost of Fuel

Public Utilities General Disclosures [Line Items]

Rate year beginning

2024-05

Application date

2024-02

Proposed increase (decrease) in annual base fuel component recoveries

$ (315)

Increase (decrease) in annual base fuel component recoveries

$ (316)

Dominion Energy South Carolina Inc | South Carolina Regulation | Electric Base Rate Case

Public Utilities General Disclosures [Line Items]

Increase (decrease) in revenue requirement

$ 291

295

Increase in proposed base rate percentage

12.59%

Increase (decrease) in net of storm damage

$ (4)

Dominion Energy South Carolina Inc | South Carolina Regulation | Electric Transmission Projects

Public Utilities General Disclosures [Line Items]

Application date

2024-03

Type of Line | kV

230

Miles of Lines | mi

Cost Estimate

$ 40

Regulatory Matters - Schedule o

Regulatory Matters - Schedule of Additional Significant Riders Associated with Virginia Power Projects (Detail) - Virginia Electric and Power Company $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Rider CCR
Public Utilities General Disclosures [Line Items]
Application Date	2024-03
Approval Date	Pending
Rate Year Beginning	2024-12
Total Revenue Requirement (millions)	$ 103	[1]
Increase (decrease) in revenue requirement	$ (91)
Rider CE
Public Utilities General Disclosures [Line Items]
Application Date	2023-10	[2]
Approval Date	March 2024	[2]
Rate Year Beginning	2024-05	[2]
Total Revenue Requirement (millions)	$ 133	[1],[2]
Increase (decrease) in revenue requirement	$ 44	[2]
Rider CE One
Public Utilities General Disclosures [Line Items]
Application Date	2024-10	[3]
Approval Date	Pending	[3]
Rate Year Beginning	2025-05	[3]
Total Revenue Requirement (millions)	$ 182	[1],[3]
Increase (decrease) in revenue requirement	$ 49	[2],[3]
Rider DIST
Public Utilities General Disclosures [Line Items]
Application Date	2024-08	[4]
Approval Date	Pending	[4]
Rate Year Beginning	2025-06	[4]
Total Revenue Requirement (millions)	$ 269	[1],[4]
Rider E
Public Utilities General Disclosures [Line Items]
Application Date	2024-01
Approval Date	September 2024
Rate Year Beginning	2024-11
Total Revenue Requirement (millions)	$ 72	[1]
Increase (decrease) in revenue requirement	$ (37)
Rider GEN
Public Utilities General Disclosures [Line Items]
Application Date	2024-06	[5]
Approval Date	Pending	[5]
Rate Year Beginning	2025-04	[5]
Total Revenue Requirement (millions)	$ 438	[1],[5]
Rider GEN One
Public Utilities General Disclosures [Line Items]
Application Date	2024-06
Approval Date	Pending
Rate Year Beginning	2026-04
Total Revenue Requirement (millions)	$ 311	[1]
Increase (decrease) in revenue requirement	$ (127)
Rider GT
Public Utilities General Disclosures [Line Items]
Application Date	2023-08
Approval Date	May 2024
Rate Year Beginning	2024-06
Total Revenue Requirement (millions)	$ 145	[1]
Increase (decrease) in revenue requirement	$ 131
Rider OSW
Public Utilities General Disclosures [Line Items]
Application Date	2023-11
Approval Date	July 2024
Rate Year Beginning	2024-09
Total Revenue Requirement (millions)	$ 486	[1]
Increase (decrease) in revenue requirement	$ 215
Rider O S W One
Public Utilities General Disclosures [Line Items]
Application Date	2024-11	[6]
Approval Date	Pending	[6]
Rate Year Beginning	2025-09	[6]
Total Revenue Requirement (millions)	$ 640	[1],[6]
Increase (decrease) in revenue requirement	$ 154	[6]
Rider RPS
Public Utilities General Disclosures [Line Items]
Application Date	2023-12	[7]
Approval Date	August 2024
Rate Year Beginning	2024-09
Total Revenue Requirement (millions)	$ 358	[1]
Increase (decrease) in revenue requirement	$ 262
Rider SNA
Public Utilities General Disclosures [Line Items]
Application Date	2023-10
Approval Date	July 2024
Rate Year Beginning	2024-09
Total Revenue Requirement (millions)	$ 69	[1]
Increase (decrease) in revenue requirement	$ 19
Rider S N A One
Public Utilities General Disclosures [Line Items]
Application Date	2024-10	[8]
Approval Date	Pending	[8]
Rate Year Beginning	2025-09	[8]
Total Revenue Requirement (millions)	$ 207	[1],[8]
Increase (decrease) in revenue requirement	$ 138	[8]
Rider T1
Public Utilities General Disclosures [Line Items]
Application Date	2024-05	[9]
Approval Date	July 2024	[9]
Rate Year Beginning	2024-09	[9]
Total Revenue Requirement (millions)	$ 1,170	[1],[9]
Increase (decrease) in revenue requirement	$ 291	[9]
Rider U
Public Utilities General Disclosures [Line Items]
Application Date	2023-10	[10]
Approval Date	July 2024	[10]
Rate Year Beginning	2024-08	[10]
Total Revenue Requirement (millions)	$ 150	[1],[10]
Increase (decrease) in revenue requirement	$ 76	[10]
DSM Riders
Public Utilities General Disclosures [Line Items]
Application Date	2023-12	[11]
Approval Date	July 2024	[11]
Rate Year Beginning	2024-09	[11]
Total Revenue Requirement (millions)	$ 86	[1],[11]
Increase (decrease) in revenue requirement	$ (21)	[11]

[1] In addition, Virginia Power has a rider associated with another project with a total annual revenue requirement of $ 18 million as of September 30, 2024. There is a pending application associated with this rider, which if approved, would result in a net annual revenue requirement increase of $ 7 million. The Virginia Commission approved four solar generation projects and 13 power purchase agreements in addition to previously approved Rider CE projects. In addition, the approved total revenue requirement includes amounts which had previously been collected under a separate rider. Associated with two solar generation projects, two small-scale solar projects and 24 purchased power agreements in addition to previously approved Rider CE projects. Consists of $ 103 million in total revenue requirement for certain previously approved electric distribution grid transformation projects and $ 166 million for previously approved phases and proposed phase eight of certain new underground distribution facilities. If approved, would result in the consolidation of Riders GT and U and cease the separate collection of rates under these riders effective June 1, 2025. Includes $ 348 million in total revenue requirement related to the consolidation of Riders BW, GV and four other riders associated with generation facilities, ceasing the separate collection of rates under these riders effective April 1, 2025 and the extension of existing rates for Rider BW through March 2025. In addition, Virginia Power also requests approval to recover costs associated with the Virginia LNG Storage Facility described above. Includes a proposal for Virginia Power to establish a decommissioning trust fund associated with the CVOW Commercial Project. If approved, the applicable amount included within the total revenue requirement would be allocated for such purposes. Virginia Power amended its application in February 2024. Virginia Power also requested approval of cost recovery of approximately $ 1.7 billion through Rider SNA for the second phase of nuclear life extension program which includes investments for calendar years 2025 through 2027. Consists of $ 532 million for the transmission component of Virginia Power’s base rates and $ 638 million for Rider T1. Consists of $ 72 million for previously approved phases and $ 78 million for phase seven costs for Rider U. In addition, the Virginia Commission approved Virginia Power’s request to extend existing rates for Rider U through July 2024. Associated with an additional three new energy efficiency programs and one new demand response program with a $ 102 million cost cap, with the ability to exceed the cost cap by no more than 15 %.

Regulatory Matters - Schedule_2

Regulatory Matters - Schedule of Additional Significant Riders Associated with Virginia Power Projects (Parenthetical) (Detail) $ in Millions		1 Months Ended	9 Months Ended
		Jul. 31, 2023 USD ($)	Sep. 30, 2024 USD ($) Project Agreement Program
Virginia Electric and Power Company
Public Utilities, General Disclosures [Line Items]
Additional total revenue requirement			$ 18
Public utilities requested rate increase annual revenue of pending applications approval			7
Rider T1 \| Virginia Electric and Power Company
Public Utilities, General Disclosures [Line Items]
Total revenue requirement	[1],[2]		1,170
Rider T1 \| Operating Segments \| Virginia Electric and Power Company \| Virginia Regulation
Public Utilities, General Disclosures [Line Items]
Total revenue requirement			638
Rider T1 \| Operating Segments \| Virginia Electric and Power Company \| Virginia Regulation \| Transmission Component Of Virginia Powers
Public Utilities, General Disclosures [Line Items]
Total revenue requirement			532
Rider SNA \| Virginia Electric and Power Company
Public Utilities, General Disclosures [Line Items]
Total revenue requirement	[2]		69
Rider SNA \| Operating Segments \| Virginia Electric and Power Company \| Virginia Regulation \| Second Phase of Nuclear Life Extension Program
Public Utilities, General Disclosures [Line Items]
Projected capital investment			$ 1,700
Rider CE
Public Utilities, General Disclosures [Line Items]
Public utilities number of power purchase agreements \| Agreement			13
Rider CE \| Virginia Electric and Power Company
Public Utilities, General Disclosures [Line Items]
Total revenue requirement	[2],[3]		$ 133
Public utilities number of solar generation projects \| Project			4
Rider CE One
Public Utilities, General Disclosures [Line Items]
Public utilities number of small scale solar project \| Agreement			2
Public utilities number of power purchase agreements \| Agreement			24
Rider CE One \| Virginia Electric and Power Company
Public Utilities, General Disclosures [Line Items]
Total revenue requirement	[2],[4]		$ 182
Public utilities number of solar generation projects \| Project			2
Rider U \| Virginia Electric and Power Company
Public Utilities, General Disclosures [Line Items]
Total revenue requirement	[2],[5]		$ 150
Rider U \| Virginia Electric and Power Company \| Virginia Regulation \| Previous Phase
Public Utilities, General Disclosures [Line Items]
Projected capital investment			72
Rider U \| Virginia Electric and Power Company \| Virginia Regulation \| Seven Phase
Public Utilities, General Disclosures [Line Items]
Projected capital investment			78
Electric Distribution Grid Transformation Projects \| Virginia Electric and Power Company
Public Utilities, General Disclosures [Line Items]
Total revenue requirement			103
Underground Distribution Facilities
Public Utilities, General Disclosures [Line Items]
Total revenue requirement			166
Consolidation of Riders BW, GV and Four Other Riders \| Virginia Electric and Power Company
Public Utilities, General Disclosures [Line Items]
Total revenue requirement			348
DSM Riders \| Virginia Electric and Power Company
Public Utilities, General Disclosures [Line Items]
Total revenue requirement	[2],[6]		86
DSM Riders \| Virginia Electric and Power Company \| Virginia Regulation
Public Utilities, General Disclosures [Line Items]
Amount of cost cap recovery			$ 102
Public utilities energy efficiency program cost exceed percentage			15%
DSM Riders \| Operating Segments \| Virginia Electric and Power Company \| Virginia Regulation
Public Utilities, General Disclosures [Line Items]
Number of new demand response programs \| Program			1
DSM Riders \| Operating Segments \| Virginia Electric and Power Company \| Virginia Regulation \| Energy Efficiency Program
Public Utilities, General Disclosures [Line Items]
Number of new energy efficiency programs \| Program			3
Base Rate Case \| Virginia Electric and Power Company \| Virginia Regulation
Public Utilities, General Disclosures [Line Items]
Total revenue requirement		$ 350

[1] Consists of $ 532 million for the transmission component of Virginia Power’s base rates and $ 638 million for Rider T1. In addition, Virginia Power has a rider associated with another project with a total annual revenue requirement of $ 18 million as of September 30, 2024. There is a pending application associated with this rider, which if approved, would result in a net annual revenue requirement increase of $ 7 million. The Virginia Commission approved four solar generation projects and 13 power purchase agreements in addition to previously approved Rider CE projects. In addition, the approved total revenue requirement includes amounts which had previously been collected under a separate rider. Associated with two solar generation projects, two small-scale solar projects and 24 purchased power agreements in addition to previously approved Rider CE projects. Consists of $ 72 million for previously approved phases and $ 78 million for phase seven costs for Rider U. In addition, the Virginia Commission approved Virginia Power’s request to extend existing rates for Rider U through July 2024. Associated with an additional three new energy efficiency programs and one new demand response program with a $ 102 million cost cap, with the ability to exceed the cost cap by no more than 15 %.

Regulatory Matters - Summary of

Regulatory Matters - Summary of Virginia Power Electric Transmission Project Applied (Detail) - Virginia Electric and Power Company $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($) mi kV
Construct new Germanna substation, transmission line and related projects in Culpeper County, Virginia
Public Utilities General Disclosures [Line Items]
Application Date	2023-11
Approval Date	2024-08
Type of Line	230 kV
Miles of Lines \| mi	2
Cost Estimate \| $	$ 55	[1]
Construct Daves Store Transmission Line Extension In Prince William County, Virginia.
Public Utilities General Disclosures [Line Items]
Application Date	2024-02
Approval Date	2024-10
Type of Line	230 kV
Miles of Lines \| mi	3
Cost Estimate \| $	$ 70	[1]
Construct new Aspen and Golden substations, transmission lines and related projects in Loudoun County, Virginia
Public Utilities General Disclosures [Line Items]
Application Date	2024-03
Type of Line	500-230 kV
Miles of Lines \| mi	10
Cost Estimate \| $	$ 690	[1]
Partial rebuild Fredericksburg-Aquia Harbour transmission lines and related projects in Stafford County and the City of Fredericksburg, Virginia
Public Utilities General Disclosures [Line Items]
Application Date	2024-03
Type of Line	230-115 kV
Miles of Lines \| mi	24
Cost Estimate \| $	$ 135	[1]
Construct new Apollo-Twin Creek transmission lines, new substations and related projects in Loudoun County, Virginia
Public Utilities General Disclosures [Line Items]
Application Date	2024-03
Type of Line \| kV	230
Miles of Lines \| mi	2
Cost Estimate \| $	$ 285	[1]
Rebuild Dooms-Harrisonburg transmission lines and related projects in the Counties of Augusta and Rockingham and the Town of Grottoes, Virginia
Public Utilities General Disclosures [Line Items]
Application Date	2024-04
Type of Line \| kV	230
Miles of Lines \| mi	22
Cost Estimate \| $	$ 60	[1]
Rebuild and construct new Fentress-Yadkin transmission lines and related projects in the City of Chesapeake, Virginia
Public Utilities General Disclosures [Line Items]
Application Date	2024-06
Type of Line \| kV	500
Miles of Lines \| mi	14
Cost Estimate \| $	$ 205	[1]
Partial rebuild, reconductor and construct new Network Takeoff transmission lines and related projects in the Counties of Fairfax and Loudoun, Virginia
Public Utilities General Disclosures [Line Items]
Application Date	2024-07
Type of Line \| kV	230
Miles of Lines \| mi	6
Cost Estimate \| $	$ 170	[1]
Rebuild Aquia Harbour-Possum Point transmission lines and related projects in the Counties of Stafford and Prince William and the City of Fredericksburg, Virginia
Public Utilities General Disclosures [Line Items]
Application Date	2024-08
Type of Line	500-230 kV
Miles of Lines \| mi	32
Cost Estimate \| $	$ 210	[1]
Partial rebuild, reconductor and construct new New Post transmission lines and related projects in the Counties of Caroline and Spotsylvania, Virginia
Public Utilities General Disclosures [Line Items]
Application Date	2024-08
Type of Line \| kV	230
Miles of Lines \| mi	38
Cost Estimate \| $	$ 120	[1]
Construct new centreport transmission line, substation and related projects in stafford county, Virginia
Public Utilities General Disclosures [Line Items]
Application Date	2024-09
Type of Line \| kV	230
Miles of Lines \| mi	3
Cost Estimate \| $	$ 55	[1]
Partial rebuild and construct new Meadowville transmission lines, substations and related projects in Chesterfield County, Virginia
Public Utilities General Disclosures [Line Items]
Application Date	2024-10
Type of Line \| kV	230
Miles of Lines \| mi	11
Cost Estimate \| $	$ 190	[1]

[1] Represents the cost estimate included in the application except as updated in the approval if applicable. In addition, Virginia Power had various other transmission projects approved or applied for and currently pending approval with aggregate cost estimates of approximately $ 145 million and $ 55 million, respectively.

Regulatory Matters - Summary _2

Regulatory Matters - Summary of Virginia Power Electric Transmission Project Applied (Parenthetical) (Details) - Virginia Electric and Power Company $ in Millions	Sep. 30, 2024 USD ($)
Other transmission projects approved
Public Utilities, General Disclosures [Line Items]
Cost Estimate	$ 145
Other transmission projects applied
Public Utilities, General Disclosures [Line Items]
Cost Estimate	$ 55

Leases (Narrative) (Detail)

Leases (Narrative) (Detail) - USD ($)	1 Months Ended		3 Months Ended			9 Months Ended
Leases (Narrative) (Detail) - USD ($)	Apr. 30, 2024	Dec. 31, 2020	Sep. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Aug. 31, 2024
Leases Disclosure [Line Items]
Payment of settlement of an agreement related to the offshore wind installation vessel under development	$ 47,000,000
Charge in connection with settlement of an agreement				$ 47,000,000
Charge in connection with settlement of an agreement, after tax				$ 35,000,000
Lessor To Complete Construction And Lease Jones Act Compliant Offshore Wind Installation Vessel [Member]
Leases Disclosure [Line Items]
Requested cash draws from lessor to fund project costs						$ 544,000,000
Required percentage payment for specific full recourse events		100%
Lessor \| Lessor To Complete Construction And Lease Jones Act Compliant Offshore Wind Installation Vessel [Member]
Leases Disclosure [Line Items]
Amount of financing commitments to fund estimated project costs								$ 715,000,000
Power Purchase Arrangement
Leases Disclosure [Line Items]
Rental revenue			$ 6,000,000		$ 7,000,000	$ 15,000,000	$ 18,000,000
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]			Revenues		Revenues	Revenues	Revenues
Depreciation expense			$ 3,000,000			$ 6,000,000	$ 4,000,000
Power Purchase Arrangement \| Minimum
Leases Disclosure [Line Items]
Depreciation expense					$ 1,000,000

Variable Interest Entities - (N

Variable Interest Entities - (Narrative) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Variable Interest Entity [Line Items]
Payable to affiliates	[1]	$ 1,796		$ 1,796		$ 1,732	[2]
Regulatory assets-current	[3]	1,030		1,030		1,309	[2]
Other current assets	[3]	550		550		459	[2]
Regulatory assets-noncurrent	[3]	8,352		8,352		8,356	[2]
Securities due within one year	[3]	1,820		1,820		6,589	[2]
Accrued interest, payroll and taxes	[3]	1,354		1,354		1,075	[2]
Long-term debt		37,101		37,101		33,248	[2]
Virginia Electric and Power Company
Variable Interest Entity [Line Items]
Payable to affiliates		1,328		1,328		1,285	[4]
Regulatory assets-current	[5]	751		751		868	[4]
Other current assets	[5]	271		271		141	[4]
Regulatory assets-noncurrent	[5]	4,561		4,561		4,317	[4]
Securities due within one year		540		540		381	[4]
Accrued interest, payroll and taxes		493		493		293	[4]
Long-term debt		20,104		20,104		17,115	[4]
Variable Interest Entity Not Primary Beneficiary \| Virginia Electric and Power Company
Variable Interest Entity [Line Items]
Regulatory assets-current		119		119
Other current assets		100		100
Regulatory assets-noncurrent		1,100		1,100
Securities due within one year		146		146
Accrued interest, payroll and taxes		40		40
Long-term debt		1,100		1,100
Variable Interest Entity Not Primary Beneficiary \| Virginia Electric and Power Company \| DES
Variable Interest Entity [Line Items]
Shared Services Purchased		125	$ 113	368	$ 339
Variable Interest Entity Not Primary Beneficiary \| Virginia Electric and Power Company \| DES \| Related Party
Variable Interest Entity [Line Items]
Payable to affiliates		$ 33		$ 33		$ 32

[1] See Note 10 for amounts attributable to related parties. Dominion Energy’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. See Note 15 for amounts attributable to VIEs. Virginia Power’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. See Note 15 for amounts attributable to VIEs.

Significant Financing Transac_3

Significant Financing Transactions (Narrative) (Detail) - USD ($)		1 Months Ended							3 Months Ended		5 Months Ended	9 Months Ended		12 Months Ended
		Oct. 31, 2024	Sep. 30, 2024	Aug. 31, 2024	Jun. 30, 2024	May 31, 2024	Mar. 31, 2024	Jan. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023		Oct. 31, 2023	Mar. 31, 2023	Nov. 30, 2020
Debt Instrument [Line Items]
Facility Limit	[1],[2]		$ 6,000,000,000						$ 6,000,000,000		$ 6,000,000,000	$ 6,000,000,000
Short-term debt			$ 4,104,000,000						$ 4,104,000,000		$ 4,104,000,000	4,104,000,000		$ 3,956,000,000	[3]
Line of credit issued												$ 3,000,000,000	$ 3,475,000,000
Preferred stock shares authorized			20,000,000						20,000,000		20,000,000	20,000,000
Issuance of common stock												$ 102,000,000	$ 91,000,000
Securities due within one year	[4]		$ 1,820,000,000						$ 1,820,000,000		$ 1,820,000,000	$ 1,820,000,000		6,589,000,000	[3]
Period of deferral						10 years
Common Stock
Debt Instrument [Line Items]
Stock repurchased, shares												0
Issuance of stock (in shares)									1,000,000	0		2,000,000	2,000,000
Stock repurchase program, authorized amount			$ 900,000,000						$ 900,000,000		$ 900,000,000	$ 900,000,000						$ 1,000,000,000
Series B Preferred Stock
Debt Instrument [Line Items]
Recorded dividend									$ 4,000,000	$ 9,000,000		$ 21,000,000	$ 27,000,000
Recorded dividends per share									$ 11.625	$ 11.625		$ 33.172	$ 34.875
Preferred stock tendered, aggregate liquidation preference					$ 440,000,000
Deemed dividend												$ 9,000,000
Series C Preferred Stock
Debt Instrument [Line Items]
Recorded dividend									$ 11,000,000	$ 11,000,000		$ 33,000,000	$ 33,000,000
Recorded dividends per share									$ 10.875	$ 10.875		$ 32.625	$ 32.625
Various Programs
Debt Instrument [Line Items]
Issuance of common stock												$ 102,000,000	$ 91,000,000
Issuance of stock (in shares)												2,000,000	2,000,000
At-the-Market Program \| Maximum
Debt Instrument [Line Items]
Sale of stock authorized amount						$ 1,800,000,000
Forward Sale Agreements
Debt Instrument [Line Items]
Weighted average initial forward price per share			$ 57.62								$ 53.23
Forward sale agreements, number of shares of common stock to be settled			3,800,000								11,400,000
Floating Rate Demand Notes
Debt Instrument [Line Items]
Facility Limit														3,000,000,000
Short-term debt			$ 482,000,000						$ 482,000,000		$ 482,000,000	$ 482,000,000		409,000,000
DESC
Debt Instrument [Line Items]
Facility Limit			500,000,000						500,000,000		500,000,000	500,000,000
Virginia Electric and Power Company
Debt Instrument [Line Items]
Facility Limit	[5],[6]		6,000,000,000						6,000,000,000		6,000,000,000	6,000,000,000
Short-term debt			740,000,000						$ 740,000,000		740,000,000	$ 740,000,000		455,000,000	[7]
Issuance of stock (in shares)									0	0		0	0
Securities due within one year			$ 540,000,000						$ 540,000,000		$ 540,000,000	$ 540,000,000		$ 381,000,000	[7]
Interest Rate						3.80%
Aggregate outstanding principal						$ 243,000,000
Debt, maturity month and year						2027-05
Virginia Electric and Power Company \| Senior Notes Due in 2034
Debt Instrument [Line Items]
Debt instrument maturity year				2034
Interest Rate				5.05%
Debt issued amount				$ 600,000,000
Virginia Electric and Power Company \| Senior Notes Due in 2054
Debt Instrument [Line Items]
Debt instrument maturity year				2054
Interest Rate				5.55%
Debt issued amount				$ 600,000,000
Dominion Energy
Debt Instrument [Line Items]
Preferred stock shares issued			1,400,000						1,400,000		1,400,000	1,400,000		1,800,000
Preferred stock shares outstanding			1,400,000						1,400,000		1,400,000	1,400,000		1,800,000
Dominion Energy \| Series B Preferred Stock
Debt Instrument [Line Items]
Preferred stock shares issued			400,000						400,000		400,000	400,000		800,000
Preferred stock shares outstanding			400,000						400,000		400,000	400,000		800,000
Stock repurchased, shares					400,000
Dominion Energy \| Series C Preferred Stock
Debt Instrument [Line Items]
Preferred stock shares issued			1,000,000						1,000,000		1,000,000	1,000,000		1,000,000
Preferred stock shares outstanding			1,000,000						1,000,000		1,000,000	1,000,000		1,000,000
Dominion Energy \| 2024 Series A EJSNs
Debt Instrument [Line Items]
Debt instrument maturity year						2055
Interest reset period						5 years
Interest Rate						6.875%
Interest rate spread						2.386%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]						us-gaap:UsTreasuryUstInterestRateMember
Interest rate minimum reset						6.875%
Dominion Energy \| 2024 Series B EJSNs
Debt Instrument [Line Items]
Debt instrument maturity year						2054
Interest reset period						5 years
Interest Rate						7%
Interest rate spread						2.511%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]						us-gaap:UsTreasuryUstInterestRateMember
Interest rate minimum reset						7%
Dominion Energy \| Senior Notes Due In February 2024
Debt Instrument [Line Items]
Recorded interest expense												$ 10,000,000
Dominion Energy \| Enhanced Junior Subordinated Notes
Debt Instrument [Line Items]
Junior subordinated notes						$ 2,000,000,000
Dominion Energy \| Enhanced Junior Subordinated Notes \| 2024 Series A EJSNs
Debt Instrument [Line Items]
Junior subordinated notes						1,000,000,000
Dominion Energy \| Enhanced Junior Subordinated Notes \| 2024 Series B EJSNs
Debt Instrument [Line Items]
Junior subordinated notes						1,000,000,000
Dominion Energy \| 3.80% Peninsula Ports Authority Due in 2033 \| Subsequent Event
Debt Instrument [Line Items]
Debt instrument maturity year		2033
Interest Rate		3.80%
Debt, redeemed remaining principal outstanding		$ 27,000,000
Dominion Energy \| 3.80% Peninsula Ports Authority Due in 2033 \| Maximum \| Subsequent Event
Debt Instrument [Line Items]
Early redemption charges to be paid		$ 1,000,000
Dominion Energy \| October 2014 Hybrids \| Subsequent Event
Debt Instrument [Line Items]
Debt instrument maturity year		2054
Debt, redeemed remaining principal outstanding		$ 685,000,000
Early redemption charges to be paid		$ 7,000,000
Joint Revolving Credit Facility
Debt Instrument [Line Items]
Facility Limit			$ 6,000,000,000						$ 6,000,000,000		$ 6,000,000,000	6,000,000,000
Letter of Credit
Debt Instrument [Line Items]
Facility Limit																	$ 100,000,000
Letters of credit issued and outstanding			48,000,000						48,000,000		48,000,000	48,000,000		$ 54,000,000
Letter of Credit \| Credit Facility, Maturing in June 2024
Debt Instrument [Line Items]
Facility Limit			30,000,000						30,000,000		30,000,000	$ 30,000,000
Letter of credit														25,000,000
Line of credit facility, maturity date												Jun. 30, 2024
Letter of Credit \| Credit Facility in June 2024
Debt Instrument [Line Items]
Facility Limit					$ 125,000,000
Letters of credit issued and outstanding			0						0		0	$ 0
Letter of Credit \| Virginia Electric and Power Company
Debt Instrument [Line Items]
Facility Limit								$ 125,000,000									$ 300,000,000
Letter of credit														0
Line of credit facility, maturity date								Jan. 31, 2026
Line of credit issued												123,000,000		124,000,000
Letter of Credit \| Virginia Electric and Power Company \| Maximum
Debt Instrument [Line Items]
Letters of credit issued and outstanding														1,000,000
Letter of Credit \| Virginia Electric and Power Company \| Credit Facility in June 2024
Debt Instrument [Line Items]
Facility Limit					$ 125,000,000
Letters of credit issued and outstanding			$ 21,000,000						$ 21,000,000		$ 21,000,000	$ 21,000,000
364 Term loan facility
Debt Instrument [Line Items]
Securities due within one year														2,500,000,000
364 Term loan facility \| Credit Facility, Maturing In July 2024
Debt Instrument [Line Items]
Facility Limit								$ 2,500,000,000
Repayments of borrowings							$ 2,500,000,000
364 Term loan facility \| Credit Facility, Maturing In October 2024
Debt Instrument [Line Items]
Facility Limit																$ 2,250,000,000
Line of credit issued							500,000,000
Repayments of borrowings						976,000,000	1,800,000,000
Securities due within one year														2,250,000,000
364 Term loan facility \| Credit Facility, Maturing In October 2024 \| General Corporate Purposes
Debt Instrument [Line Items]
Line of credit issued							$ 500,000,000
Sustainability Revolving Credit Facility \| Dominion Energy
Debt Instrument [Line Items]
Line of credit facility, maturity date					Jun. 30, 2025
Repayments of borrowings						$ 450,000,000
Securities due within one year														$ 450,000,000

[1] In May 2024, the joint revolving credit facility was amended to remove Questar Gas as a co-borrower This credit facility matures in June 2026, with the potential to be extended by the borrowers to June 2028, and can be used by the borrowers under the credit facility to support bank borrowings and the issuance of commercial paper, as well as to support up to a combined $ 2.0 billion of letters of credit Dominion Energy’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date. See Note 15 for amounts attributable to VIEs. In May 2024, the joint revolving credit facility was amended to remove Questar Gas as a co-borrower. The full amount of the facility is available to Virginia Power, less any amounts outstanding to co-borrowers Dominion Energy and DESC. The sub-limit for Virginia Power is set pursuant to the terms of the facility but can be changed at the option of the borrowers multiple times per year. At September 30, 2024 , the sub-limit for Virginia Power was $ 1.75 billion. If Virginia Power has liquidity needs in excess of its sub-limit, the sub-limit may be changed or such needs may be satisfied through short-term intercompany borrowings from Dominion Energy. This credit facility matures in June 2026, with the potential to be extended by the borrowers to June 2028. The credit facility can be used to support bank borrowings and the issuance of commercial paper, as well as to support up to $ 2.0 billion (or the sub-limit, whichever is less) of letters of credit. Virginia Power’s Consolidated Balance Sheet at December 31, 2023 has been derived from the audited Consolidated Balance Sheet at that date.

Significant Financing Transac_4

Significant Financing Transactions (Commercial Paper, Bank Loans and Letters of Credit Outstanding) (Detail)	Sep. 30, 2024 USD ($)
Line of Credit Facility [Line Items]
Facility Limit	$ 6,000,000,000	[1],[2]
Outstanding Commercial Paper	3,622,000,000	[1],[2]
Outstanding Letters of Credit	21,000,000	[1],[2]
Facility Capacity Available	2,357,000,000	[1],[2]
Virginia Electric and Power Company
Line of Credit Facility [Line Items]
Facility Limit	6,000,000,000	[3],[4]
Outstanding Commercial Paper	740,000,000	[3],[4]
Outstanding Letters of Credit	$ 10,000,000	[3],[4]

[1] In May 2024, the joint revolving credit facility was amended to remove Questar Gas as a co-borrower This credit facility matures in June 2026, with the potential to be extended by the borrowers to June 2028, and can be used by the borrowers under the credit facility to support bank borrowings and the issuance of commercial paper, as well as to support up to a combined $ 2.0 billion of letters of credit In May 2024, the joint revolving credit facility was amended to remove Questar Gas as a co-borrower. The full amount of the facility is available to Virginia Power, less any amounts outstanding to co-borrowers Dominion Energy and DESC. The sub-limit for Virginia Power is set pursuant to the terms of the facility but can be changed at the option of the borrowers multiple times per year. At September 30, 2024 , the sub-limit for Virginia Power was $ 1.75 billion. If Virginia Power has liquidity needs in excess of its sub-limit, the sub-limit may be changed or such needs may be satisfied through short-term intercompany borrowings from Dominion Energy. This credit facility matures in June 2026, with the potential to be extended by the borrowers to June 2028. The credit facility can be used to support bank borrowings and the issuance of commercial paper, as well as to support up to $ 2.0 billion (or the sub-limit, whichever is less) of letters of credit.

Significant Financing Transac_5

Significant Financing Transactions (Commercial Paper, Bank Loans and Letters of Credit Outstanding) (Parenthetical) (Detail)	Sep. 30, 2024 USD ($)
Line of Credit Facility [Line Items]
Facility Limit	$ 6,000,000,000	[1],[2]
Virginia Electric and Power Company
Line of Credit Facility [Line Items]
Facility Limit	6,000,000,000	[3],[4]
Letter of Credit Matures in June 2028.
Line of Credit Facility [Line Items]
Facility Limit	2,000,000,000
Letter of Credit Matures in June 2028. \| Virginia Electric and Power Company
Line of Credit Facility [Line Items]
Facility Limit	2,000,000,000
Line of Credit \| Virginia Electric and Power Company
Line of Credit Facility [Line Items]
Facility Limit	$ 1,750,000,000

[1] In May 2024, the joint revolving credit facility was amended to remove Questar Gas as a co-borrower This credit facility matures in June 2026, with the potential to be extended by the borrowers to June 2028, and can be used by the borrowers under the credit facility to support bank borrowings and the issuance of commercial paper, as well as to support up to a combined $ 2.0 billion of letters of credit In May 2024, the joint revolving credit facility was amended to remove Questar Gas as a co-borrower. The full amount of the facility is available to Virginia Power, less any amounts outstanding to co-borrowers Dominion Energy and DESC. The sub-limit for Virginia Power is set pursuant to the terms of the facility but can be changed at the option of the borrowers multiple times per year. At September 30, 2024 , the sub-limit for Virginia Power was $ 1.75 billion. If Virginia Power has liquidity needs in excess of its sub-limit, the sub-limit may be changed or such needs may be satisfied through short-term intercompany borrowings from Dominion Energy. This credit facility matures in June 2026, with the potential to be extended by the borrowers to June 2028. The credit facility can be used to support bank borrowings and the issuance of commercial paper, as well as to support up to $ 2.0 billion (or the sub-limit, whichever is less) of letters of credit.

Commitments and Contingencies_2

Commitments and Contingencies (Narrative) (Detail) shares in Millions

1 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

May 31, 2024

Mar. 31, 2024 USD ($)

Dec. 31, 2023 USD ($)

Jul. 31, 2023 USD ($)

Sep. 30, 2022 USD ($)

Jun. 30, 2022 USD ($)

May 31, 2022 shares

Aug. 31, 2021 shares

Jun. 30, 2021 USD ($)

Dec. 31, 2020 USD ($)

Oct. 31, 2020

Jun. 30, 2018 USD ($)

Apr. 30, 2017 Petition

Aug. 31, 2016 T

Sep. 30, 2024 USD ($)

Sep. 30, 2023 USD ($)

Mar. 31, 2023 USD ($)

Sep. 30, 2024 USD ($) Indicator Site Facility gal

Sep. 30, 2023 USD ($)

Dec. 31, 2023 USD ($)

Jun. 30, 2023 USD ($)

Dec. 31, 2022 USD ($)

Loss Contingencies [Line Items]

Gain on sales of assets

$ 0

$ 2,000,000

$ 23,000,000

Gain on sales of assets after tax

$ 967,000,000

$ 698,000,000

$ 2,018,000,000

1,813,000,000

Nuclear Obligations | Secondary Financial Protection Program

Loss Contingencies [Line Items]

Maximum liability protection per nuclear incident amount

$ 16,300,000,000

$ 16,200,000,000

Virginia Electric and Power Company | EPA and State Regulatory Agencies

Loss Contingencies [Line Items]

Number of facilities to assess the applicability of section 316(b) | Facility

Hydroelectric Facilities | EPA and State Regulatory Agencies

Loss Contingencies [Line Items]

Number of facilities to assess the applicability of section 316(b) | Facility

Dominion Energy South Carolina Inc | SCDOR

Loss Contingencies [Line Items]

Litigation settlement paid

$ 51,000,000

$ 165,000,000

Proposed assessment amount from audit

$ 410,000,000

Proportional share of NND project

100%

Fair value of certain non-utility property transferred

$ 28,000,000

Fair value of utility property transferred

$ 10,000,000

Gain upon completion of remaining transfer of utility properties

$ 11,000,000

Fair value of additional utility property transferred

$ 3,000,000

Dominion Energy South Carolina Inc | DESC | SCDOR | Common Stock

Loss Contingencies [Line Items]

Initial litigation settlement through stock issuance | shares

0.9

0.6

Dominion Energy South Carolina Inc | Utility Property Transferred | SCDOR

Loss Contingencies [Line Items]

Gain on sales of assets

9,000,000

Gain on sales of assets after tax

7,000,000

Dominion Energy South Carolina Inc | Remaining Utility Property Transferred | SCDOR

Loss Contingencies [Line Items]

Gain on sales of assets

11,000,000

Gain on sales of assets after tax

$ 8,000,000

Dominion Energy South Carolina Inc | Minimum | SCDOR

Loss Contingencies [Line Items]

Initial litigation settlement amount through stock issuance

$ 43,000,000

Dominion Energy South Carolina Inc | Maximum | SCDOR

Loss Contingencies [Line Items]

Cash payment for remaining obligation

$ 1,000,000

Unfavorable Regulatory Action | EPA

Loss Contingencies [Line Items]

Electric generating station facilities water withdrawals per day | gal

2,000,000

Electric generating station facilities heightened entrainment analysis per day | gal

125,000,000

Carbon Regulations

Loss Contingencies [Line Items]

Public Utilities Significant Emission Rate Per Year CO2 Equivalent | T

75,000

CWA | Unfavorable Regulatory Action

Loss Contingencies [Line Items]

Number of mandatory facility-specific factors | Indicator

Number of optional facility-specific factors | Indicator

Number of facilities that are subject to final regulations | Facility

CWA | Unfavorable Regulatory Action | EPA | Final Rule to Revise Effluent Limitations Guidelines for Steam Electric Power Generating Category

Loss Contingencies [Line Items]

Number of separate petitions for reconsideration granted | Petition

Loss contingencies facility retirement period

2034

CWA | Unfavorable Regulatory Action | EPA | Minimum | Final Rule to Revise Effluent Limitations Guidelines for Steam Electric Power Generating Category

Loss Contingencies [Line Items]

Loss contingencies individual circumstances period

2021

CWA | Unfavorable Regulatory Action | EPA | Maximum | Final Rule to Revise Effluent Limitations Guidelines for Steam Electric Power Generating Category

Loss Contingencies [Line Items]

Loss contingencies individual circumstances period

2029

2028

CWA | Unfavorable Regulatory Action | Virginia Electric and Power Company

Loss Contingencies [Line Items]

Number of facilities that are subject to final regulations | Facility

Waste Management and Remediation | Unfavorable Regulatory Action | EPA

Loss Contingencies [Line Items]

Number of sites remediation work substantially completed | Site

Number of additional sites which are not under investigation | Site

Waste Management and Remediation | Unfavorable Regulatory Action | EPA | Former Gas Plant Site With Post Closure Groundwater Monitoring Program

Loss Contingencies [Line Items]

Environmental remediation reserves

$ 31,000,000

$ 32,000,000

Waste Management and Remediation | Unfavorable Regulatory Action | Virginia Electric and Power Company | EPA

Loss Contingencies [Line Items]

Number of sites with remediation plans | Site

Number of additional sites which are not under investigation | Site

Waste Management and Remediation | Unfavorable Regulatory Action | Virginia Electric and Power Company | EPA | Former Gas Plant Site With Post Closure Groundwater Monitoring Program

Loss Contingencies [Line Items]

Environmental remediation reserves

$ 25,000,000

25,000,000

Millstone, Summer, Surry and North Anna

Loss Contingencies [Line Items]

Amount of coverage purchased from commercial insurance pools

$ 500,000,000

$ 450,000,000

Commitments and Contingencies_3

Commitments and Contingencies (Guarantees, Surety Bonds and Letters of Credit) (Detail)	Sep. 30, 2024 USD ($)
Guarantee Obligations [Line Items]
Guarantee liability	$ 4,041,000,000	[1],[2]
Guarantee obligations additional guarantees	20,000,000
Cove Point
Guarantee Obligations [Line Items]
Guarantee obligations cumulative maximum exposure	1,900,000,000
Surety Bond
Guarantee Obligations [Line Items]
Guarantee liability	319,000,000
Surety Bond \| Virginia Electric and Power Company
Guarantee Obligations [Line Items]
Guarantee liability	250,000,000
Financial Standby Letter of Credit
Guarantee Obligations [Line Items]
Guarantee liability	$ 21,000,000

[1] Excludes Dominion Energy’s guarantee of an offshore wind installation vessel discussed in Note 15 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. In July 2016, Dominion Energy signed an agreement (subsequently amended most recently in December 2023) with a lessor to construct and lease a new corporate office property in Richmond, Virginia and commenced the five-year lease term in August 2019 , with certain options at the end of the initial lease term as discussed in Note 23 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. In July 2024, the agreement was amended to reflect Dominion Energy’s election to extend the lease term through July 2029 . At the end of the lease term, Dominion Energy can (i) extend the term of the lease for at least one year , subject to the approval of the participants, at current market terms, (ii) purchase the property for an amount equal to the project costs or, (iii) subject to certain terms and conditions, sell the property on behalf of the lessor to a third party using commercially reasonable efforts to obtain the highest cash purchase price for the property. If the project is sold and the proceeds from the sale are insufficient to repay the investors for the project costs, Dominion Energy may be required to make a payment to the lessor equal to the recorded lease balance.

Commitments and Contingencies -

Commitments and Contingencies - Schedule of Subsidiary Guarantees (Detail)	Sep. 30, 2024 USD ($)
Guarantee Obligations [Line Items]
Maximum Exposure	$ 4,041,000,000	[1],[2]
Commodity Transactions
Guarantee Obligations [Line Items]
Maximum Exposure	2,765,000,000	[3]
Nuclear Obligations
Guarantee Obligations [Line Items]
Maximum Exposure	220,000,000	[4]
Solar
Guarantee Obligations [Line Items]
Maximum Exposure	207,000,000	[5]
Other
Guarantee Obligations [Line Items]
Maximum Exposure	$ 849,000,000	[6]

[1] Excludes Dominion Energy’s guarantee of an offshore wind installation vessel discussed in Note 15 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. In July 2016, Dominion Energy signed an agreement (subsequently amended most recently in December 2023) with a lessor to construct and lease a new corporate office property in Richmond, Virginia and commenced the five-year lease term in August 2019 , with certain options at the end of the initial lease term as discussed in Note 23 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023. In July 2024, the agreement was amended to reflect Dominion Energy’s election to extend the lease term through July 2029 . At the end of the lease term, Dominion Energy can (i) extend the term of the lease for at least one year , subject to the approval of the participants, at current market terms, (ii) purchase the property for an amount equal to the project costs or, (iii) subject to certain terms and conditions, sell the property on behalf of the lessor to a third party using commercially reasonable efforts to obtain the highest cash purchase price for the property. If the project is sold and the proceeds from the sale are insufficient to repay the investors for the project costs, Dominion Energy may be required to make a payment to the lessor equal to the recorded lease balance. Guarantees related to commodity commitments of certain subsidiaries. These guarantees were provided to counterparties in order to facilitate physical and financial transaction related commodities and services. Guarantees primarily related to certain DGI subsidiaries regarding all aspects of running a nuclear facility. Includes guarantees to facilitate the development of solar projects. Guarantees related to other miscellaneous contractual obligations such as leases, environmental obligations, construction projects and insurance programs. Due to the uncertainty of workers’ compensation claims, the parental guarantee has no stated limit.

Commitments and Contingencies_4

Commitments and Contingencies - Schedule of Subsidiary Guarantees (Parenthetical) (Detail) - Lessor - New Corporate Office - Agreement with Lessor to Construct and Lease Corporate Office Property	1 Months Ended
	Jul. 31, 2024	Jul. 31, 2016	Sep. 30, 2024
Guarantee Obligations [Line Items]
Lease commenced term		5 years
Lease commencement period		2019-08
Lessee, operating Lease, existence of option to extend	true
Lessee operating lease extended maturity period	2029-07
Minimum
Guarantee Obligations [Line Items]
Lease extend term			1 year

Credit Risk (Narrative) (Detail

Credit Risk (Narrative) (Detail)	9 Months Ended
Credit Risk (Narrative) (Detail)	Sep. 30, 2024 USD ($) Counterparty	Dec. 31, 2023 USD ($)
Concentration Risk and Guarantor Obligations [Line Items]
Credit exposure	$ 138,000,000
Number of counterparties \| Counterparty	0
Amount of exposure for single counterparty	$ 28,000,000
Additional collateral to be posted if the credit related contingent features were triggered	19,000,000	$ 28,000,000
Collateral derivatives with credit-related contingent provision in a liability position	0	0
Aggregate fair value of all derivative instruments with credit contingent provisions that are in a liability position	19,000,000	28,000,000
Maximum
Concentration Risk and Guarantor Obligations [Line Items]
Letter of credit as collateral posted for derivatives in liability position		1,000,000
Virginia Electric and Power Company
Concentration Risk and Guarantor Obligations [Line Items]
Credit exposure	$ 82,000,000
Number of counterparties \| Counterparty	0
Amount of exposure for single counterparty	$ 10,000,000
Additional collateral to be posted if the credit related contingent features were triggered	13,000,000	14,000,000
Collateral derivatives with credit-related contingent provision in a liability position	0	0
Aggregate fair value of all derivative instruments with credit contingent provisions that are in a liability position	$ 13,000,000	14,000,000
Virginia Electric and Power Company \| Maximum
Concentration Risk and Guarantor Obligations [Line Items]
Letter of credit as collateral posted for derivatives in liability position		$ 1,000,000
Credit Concentration Risk \| Investment Grade Counterparty \| Virginia Electric and Power Company
Concentration Risk and Guarantor Obligations [Line Items]
Concentration risk, percentage (percentage)	58%
Credit Concentration Risk \| Investment Grade \| Investment Grade Counterparty
Concentration Risk and Guarantor Obligations [Line Items]
Concentration risk, percentage (percentage)	74%

Related-Party Transactions (Nar

Related-Party Transactions (Narrative) (Detail) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
Related-Party Transactions (Narrative) (Detail) - USD ($)	Oct. 31, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Related Party Transaction [Line Items]
Amounts due to Dominion, noncurrent		$ 1,296,000,000		$ 1,296,000,000		$ 1,755,000,000	[1]
Borrowing Interest Charges		17,000,000	$ 27,000,000	23,000,000	$ 72,000,000
Dividend paid		559,000,000	$ 559,000,000	1,678,000,000	$ 1,674,000,000
Virginia Electric and Power Company
Related Party Transaction [Line Items]
Amounts due to Dominion, noncurrent		1,096,000,000		1,096,000,000		1,125,000,000	[2]
Payable to affiliates		633,000,000		633,000,000		500,000,000	[2]
Outstanding borrowings, net of repayments, under money pool for non-regulated subsidiaries		$ 0		$ 0		$ 0
Issuance of stock (in shares)		0	0	0	0
Dividend paid	$ 600,000,000
Commencing Period						20 months
Lease commencement term						2025-08
Related party transaction costs						$ 240,000,000
Cost of Revenue, Related Party [Extensible Enumeration]						Affiliated Entity
Virginia Electric and Power Company \| Affiliated Entity
Related Party Transaction [Line Items]
Derivative assets		$ 11,000,000		$ 11,000,000		$ 1,000,000
Derivative liabilities		43,000,000		43,000,000		79,000,000
Virginia Electric and Power Company \| Affiliated Entity \| Pension Benefits \| Amounts Associated With Dominion Pension Plan
Related Party Transaction [Line Items]
Amounts due to Dominion, noncurrent		493,000,000		493,000,000		456,000,000
Virginia Electric and Power Company \| Affiliated Entity \| Medical Coverage for Local retirees \| Amounts Associated with the Dominion Retiree Health and Welfare Plan
Related Party Transaction [Line Items]
Amounts due from Dominion, noncurrent		640,000,000		640,000,000		584,000,000
Virginia Electric and Power Company \| Principal Owner \| Short-Term Borrowing Arrangements
Related Party Transaction [Line Items]
Payable to affiliates		$ 633,000,000		$ 633,000,000		$ 500,000,000

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

Related-Party Transactions (Det

Related-Party Transactions (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
Related-Party Transactions (Detail) - USD ($) $ in Millions		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Related Party Transaction [Line Items]
Services provided to affiliates		$ 3,941	$ 3,810	$ 11,059	$ 10,859
Virginia Electric and Power Company
Related Party Transaction [Line Items]
Services provided to affiliates	[1]	2,762	2,645	7,788	7,281
Virginia Electric and Power Company \| Affiliated Entity
Related Party Transaction [Line Items]
Commodity purchases from affiliates		147	146	453	463
Virginia Electric and Power Company \| Related Party
Related Party Transaction [Line Items]
Services provided by affiliates	[2]	169	149	495	441
Services provided to affiliates		$ 4	$ 7	$ 12	$ 15

[1] See Note 19 for amounts attributable to affiliates. Includes capitalized expenditures of $ 59 million and $ 51 million for the three months ended September 30, 2024 and 2023 , respectively and $ 170 million and $ 151 million for the nine months ended September 30, 2024 and 2023 , respectively.

Related-Party Transactions (Par

Related-Party Transactions (Parenthetical) (Detail) - Virginia Electric and Power Company - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Related Party Transaction [Line Items]
Capital expenditures			$ 6,885	$ 4,871
Services provided by affiliates \| Affiliated Entity
Related Party Transaction [Line Items]
Capital expenditures	$ 59	$ 51	$ 170	$ 151

Employee Benefit Plans (Compone

Employee Benefit Plans (Components of Provision for Net Periodic Benefit Cost (Credit)) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 19	$ 24	$ 63	$ 72
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]		Other Nonoperating Income (Expense)		Other Nonoperating Income (Expense)
Interest cost	107	$ 111	324	$ 332
Expected return on plan assets	(200)	(216)	(611)	(648)
Amortization of prior service cost (credit)	1		1
Amortization of net actuarial (gain) loss	3		16
Settlements and curtailments			4
Plan amendment			22
Net periodic benefit (credit) cost	(70)	(81)	(181)	(244)
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	$ 3	8	$ 10
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]		Other Nonoperating Income (Expense)		Other Nonoperating Income (Expense)
Interest cost	15	$ 15	43	$ 46
Expected return on plan assets	(43)	(37)	(128)	(113)
Amortization of prior service cost (credit)	(9)	(10)	(27)	(28)
Amortization of net actuarial (gain) loss	(1)	(1)	(5)	(4)
Settlements and curtailments	(1)		(1)
Net periodic benefit (credit) cost	$ (37)	$ (30)	$ (110)	$ (89)

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2024	Oct. 31, 2024
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan operating expenses within discontinued operations			$ 23
Defined Contribution Plan Operating Expenses Within Discontinued Operations After Tax			17
Defined contribution plan other operations and maintenance expense			13
Defined contribution plan other operations and maintenance expense after tax			10
Discontinued operations
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 1			$ 4	$ 5	$ 12
Non-service cost (credit)	0			(11)	13	(34)
Other Postretirement Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	2			3	8	10
Decrease in the accumulated postretirement benefit obligation, transferred upon closing	(1)				(1)
Defined benefit plan, loss on sale	1			1	5	4
Other Postretirement Benefits Plan \| Closure of East Ohio Transaction
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Increase in the fair value of the plan assets due to remeasurement		$ 24	19
Increase in the fair value of the plan assets, transferred upon closing		5	36
Decrease in the accumulated postretirement benefit obligation		14	38
Decrease in the accumulated postretirement benefit obligation, transferred upon closing		$ 6	22
Increase (decrease) in net periodic benefit credit			1
Defined benefit plan, loss on sale			$ (9)
Other Postretirement Benefits Plan \| Questar Gas and Wexpro
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Remeasurement, discount rate		5.74%
Defined benefit plan, loss on sale		$ 1
Other Postretirement Benefits Plan \| Forecast \| Questar Gas and Wexpro
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Increase (decrease) in net periodic benefit credit							$ 3
Other Postretirement Benefits Plan \| Minimum \| Closure of East Ohio Transaction
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Remeasurement, discount rate			5.61%
Other Postretirement Benefits Plan \| Maximum \| Closure of East Ohio Transaction
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Remeasurement, discount rate			5.62%
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contributions to qualified defined benefit pension plans	33				40
Service cost	19			$ 24	63	$ 72
Decrease in the accumulated postretirement benefit obligation, transferred upon closing					4
Defined benefit plan, loss on sale	$ (3)				$ (16)
Pension Benefits \| Subsequent Event
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Additional employer contributions								$ 6
Pension Benefits \| Closure of East Ohio Transaction
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Decrease in the pension benefit obligation due to remeasurement			$ 419
Decrease in the pension benefit obligation, amount transferred upon closing			195
Increase in the fair value of the plan assets due to remeasurement			555
Increase in the fair value of the plan assets, transferred upon closing			531
Increase (decrease) in net periodic benefit credit			$ 11
Remeasurement, discount rate			5.62%
Defined benefit plan, loss on sale			$ 147
Pension Benefits \| Questar Gas and Wexpro
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Decrease in the pension benefit obligation due to remeasurement		251
Decrease in the pension benefit obligation, amount transferred upon closing		136
Increase in the fair value of the plan assets due to remeasurement		248
Increase in the fair value of the plan assets, transferred upon closing		$ 138
Remeasurement, discount rate		5.75%
Defined benefit plan, loss on sale		$ 49
Pension Benefits \| Forecast \| Questar Gas and Wexpro
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Increase (decrease) in net periodic benefit credit							$ 8

Operating Segments - Dominion E

Operating Segments - Dominion Energy (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Gain (loss) on investments				$ 589	$ 228
Charge for the write-off of certain previously deferred amounts	$ 122		$ 1	219	136
Charge in connection with settlement of an agreement		$ 47
Charge in connection with settlement of an agreement, after tax		$ 35
Operating Segments
Segment Reporting Information [Line Items]
After- tax net benefits (expenses)				155
Gain (loss) on investments				518	183
Gain (loss) on investments, after tax				$ 402	$ 142
Investment, Type [Extensible Enumeration]	Nuclear Decommissioning Trust Fund [Member]		Nuclear Decommissioning Trust Fund [Member]	Nuclear Decommissioning Trust Fund [Member]	Nuclear Decommissioning Trust Fund [Member]
Corporate and Other \| Operating Segments
Segment Reporting Information [Line Items]
After- tax net benefits (expenses)				$ 28	$ (14)
After- tax net benefits (expenses) for specific items				319	245
Contracted Energy \| Operating Segments
Segment Reporting Information [Line Items]
Gain (loss) on investments, after tax				347	124
Loss related to economic hedging activities				107
Loss related to economic hedging activities after tax				82
Gain related to economic hedging activities					335
Gain related to economic hedging activities after tax					255
Charge in connection with settlement of an agreement				47
Charge in connection with settlement of an agreement, after tax				35
Charge for impairment of nonregulated renewable natural gas facilities				60
Charge for impairment of nonregulated renewable natural gas facilities after tax				46
Dominion Energy Virginia \| Operating Segments
Segment Reporting Information [Line Items]
Gain (loss) on investments, after tax				$ 55	$ 18
Investment, Type [Extensible Enumeration]	Nuclear Decommissioning Trust Fund [Member]		Nuclear Decommissioning Trust Fund [Member]	Nuclear Decommissioning Trust Fund [Member]	Nuclear Decommissioning Trust Fund [Member]
Charge for amortization of a regulatory asset, 2021 Triennial Review					$ 183
Charge for amortization of a regulatory asset, 2021 Triennial Review, after tax					136
Charge related to write-off of certain early stage development costs				$ 30
Charge related to write-off of certain early stage development costs after tax				22
Dominion Energy Virginia \| Deferred amounts related to certain riders \| Operating Segments
Segment Reporting Information [Line Items]
Charge for the write-off of certain previously deferred amounts					36
Charge for the write-off of certain previously deferred amounts, after tax					27
Dominion Energy South Carolina \| Operating Segments
Segment Reporting Information [Line Items]
Benefit related to real estate transactions					31
Benefit related to real estate transactions, after tax					$ 23
Charge in connection with the electric base rate case				58
Charge in connection with the electric base rate case, after tax				$ 44

Operating Segments (Schedule of

Operating Segments (Schedule of Segment Reporting Information, by Segment) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Operating Revenue		$ 3,941	$ 3,810	$ 11,059	$ 10,859
Net Income from discontinued operations including noncontrolling interest	[1]	(13)	(541)	182	(92)
Net income (loss) attributable to Dominion Energy		954	157	2,200	1,721
Operating Segments
Segment Reporting Information [Line Items]
Total revenue from external customers		3,941	3,810	11,059	10,859
Adjustments & Eliminations
Segment Reporting Information [Line Items]
Net Income from discontinued operations including noncontrolling interest		0	0	0	0
Net income (loss) attributable to Dominion Energy		0	0	0	0
Intersegment revenue
Segment Reporting Information [Line Items]
Operating Revenue		0	0	0	0
Adjustments & Eliminations
Segment Reporting Information [Line Items]
Operating Revenue		(260)	(235)	(761)	(707)
Eliminations
Segment Reporting Information [Line Items]
Total revenue from external customers		0	0	0	0
Operating Revenue		(260)	(235)	(761)	(707)
Dominion Energy Virginia \| Operating Segments
Segment Reporting Information [Line Items]
Total revenue from external customers		2,760	2,649	7,786	7,286
Operating Revenue		2,762	2,645	7,788	7,281
Net Income from discontinued operations including noncontrolling interest		0	0	0	0
Net income (loss) attributable to Dominion Energy		662	535	1,571	1,315
Dominion Energy Virginia \| Intersegment revenue
Segment Reporting Information [Line Items]
Operating Revenue		2	(4)	2	(5)
Dominion Energy South Carolina \| Operating Segments
Segment Reporting Information [Line Items]
Total revenue from external customers		846	944	2,496	2,559
Operating Revenue		848	945	2,503	2,563
Net Income from discontinued operations including noncontrolling interest		0	0	0	0
Net income (loss) attributable to Dominion Energy		147	143	296	302
Dominion Energy South Carolina \| Intersegment revenue
Segment Reporting Information [Line Items]
Operating Revenue		2	1	7	4
Contracted Energy \| Operating Segments
Segment Reporting Information [Line Items]
Total revenue from external customers		256	225	843	659
Operating Revenue		260	231	852	673
Net Income from discontinued operations including noncontrolling interest		0	0	0	0
Net income (loss) attributable to Dominion Energy		83	52	305	118
Contracted Energy \| Intersegment revenue
Segment Reporting Information [Line Items]
Operating Revenue		4	6	9	14
Corporate and Other \| Operating Segments
Segment Reporting Information [Line Items]
Total revenue from external customers		79	(8)	(66)	355
Operating Revenue		331	224	677	1,049
Net Income from discontinued operations including noncontrolling interest		(13)	(541)	182	(92)
Net income (loss) attributable to Dominion Energy		62	(573)	28	(14)
Corporate and Other \| Intersegment revenue
Segment Reporting Information [Line Items]
Operating Revenue		$ 252	$ 232	$ 743	$ 694

[1] Includes income tax expense (benefit) of $( 10 ) million and $ 1.2 billion for the three months ended September 30, 2024 and 2023 , respectively, and $ 22 million and $ 1.3 billion for the nine months ended September 30, 2024 and 2023 , respectively.

Operating Segments - Virginia P

Operating Segments - Virginia Power (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Gain (loss) on investments			$ 589	$ 228
Charge for the write-off of certain previously deferred amounts	$ 122	$ 1	219	136
Virginia Electric and Power Company
Segment Reporting Information [Line Items]
Gain (loss) on investments			85	31
Operating Segments
Segment Reporting Information [Line Items]
After- tax net benefits (expenses)			155
Gain (loss) on investments			518	183
Gain (loss) on investments, after tax			$ 402	$ 142
Investment, Type [Extensible Enumeration]	Nuclear Decommissioning Trust Fund [Member]	Nuclear Decommissioning Trust Fund [Member]	Nuclear Decommissioning Trust Fund [Member]	Nuclear Decommissioning Trust Fund [Member]
Operating Segments \| Corporate and Other
Segment Reporting Information [Line Items]
After- tax net benefits (expenses)			$ 28	$ (14)
After- tax net benefits (expenses) for specific items			319	245
Operating Segments \| Virginia Electric and Power Company
Segment Reporting Information [Line Items]
After- tax net benefits (expenses)				(154)
Charge for amortization of a regulatory asset, 2021 Triennial Review				183
Charge for amortization of a regulatory asset, 2021 Triennial Review, after tax				136
Gain (loss) on investments			74	24
Gain (loss) on investments, after tax			$ 55	18
Charge for the write-off of certain previously deferred amounts				36
Charge for the write-off of certain previously deferred amounts, after tax				$ 27
Investment, Type [Extensible Enumeration]	Nuclear Decommissioning Trust Fund [Member]	Nuclear Decommissioning Trust Fund [Member]	Nuclear Decommissioning Trust Fund [Member]	Nuclear Decommissioning Trust Fund [Member]
Charge for write-off of certain early stage development costs			$ 30
Charge for write-off of certain early stage development costs after tax			22
Operating Segments \| Virginia Electric and Power Company \| Corporate and Other
Segment Reporting Information [Line Items]
After- tax net benefits (expenses)			27	$ (151)
After- tax net benefits (expenses) for specific items			$ 25	$ (155)

Operating Segments (Schedule _2

Operating Segments (Schedule of Segment Reporting Information, by Segment, Virginia Power) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Operating Revenue		$ 3,941	$ 3,810	$ 11,059	$ 10,859
Net Income (Loss)		954	157	2,200	1,721
Virginia Electric and Power Company
Segment Reporting Information [Line Items]
Operating Revenue	[1]	2,762	2,645	7,788	7,281
Net Income (Loss)		654	475	1,598	1,164
Dominion Energy Virginia \| Virginia Electric and Power Company
Segment Reporting Information [Line Items]
Operating Revenue		2,762	2,645	7,788	7,281
Net Income (Loss)		662	535	1,571	1,315
Corporate and Other \| Virginia Electric and Power Company
Segment Reporting Information [Line Items]
Operating Revenue		0	0	0	0
Net Income (Loss)		$ (8)	$ (60)	$ 27	$ (151)

[1] See Note 19 for amounts attributable to affiliates.