Consolidated Edison (ED) 10-Q 7 Nov 24 2024 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2024	Oct. 31, 2024
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	1-14514
Entity Registrant Name	Consolidated Edison, Inc.
Entity Incorporation, State or Country Code	NY
Entity Tax Identification Number	13-3965100
Entity Address, Address Line One	4 Irving Place,
Entity Address, City or Town	New York,
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10003
City Area Code	(212)
Local Phone Number	460-4600
Title of 12(b) Security	Common Shares ($.10 par value)
Trading Symbol	ED
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		346,412,190
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001047862
Current Fiscal Year End Date	--12-31
CECONY
Document Information [Line Items]
Entity File Number	1-01217
Entity Registrant Name	Consolidated Edison Company of New York, Inc.
Entity Incorporation, State or Country Code	NY
Entity Tax Identification Number	13-5009340
Entity Address, Address Line One	4 Irving Place,
Entity Address, City or Town	New York,
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10003
City Area Code	(212)
Local Phone Number	460-4600
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000023632
Current Fiscal Year End Date	--12-31

CONSOLIDATED INCOME STATEMENT (

CONSOLIDATED INCOME STATEMENT (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
OPERATING REVENUES
TOTAL OPERATING REVENUES	$ 4,092	$ 3,872	$ 11,587	$ 11,219
OPERATING EXPENSES
Depreciation and amortization	550	512	1,601	1,506
Taxes, other than income taxes	857	801	2,448	2,282
TOTAL OPERATING EXPENSES	3,230	3,149	9,364	9,340
Gain (Loss) on sale of the Clean Energy Businesses	0	(1)	(30)	866
OPERATING INCOME	862	722	2,193	2,745
OTHER INCOME (DEDUCTIONS)
Investment income	17	8	46	23
Other income	157	210	476	625
Allowance for equity funds used during construction	8	7	29	20
Other deductions	(17)	(18)	(44)	(57)
TOTAL OTHER INCOME	165	207	507	611
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	1,027	929	2,700	3,356
INTEREST EXPENSE (INCOME)
Interest on long-term debt	275	234	797	719
Other interest expense	47	39	131	78
Allowance for borrowed funds used during construction	(16)	(14)	(45)	(39)
NET INTEREST EXPENSE	306	259	883	758
INCOME BEFORE INCOME TAX EXPENSE	721	670	1,817	2,598
INCOME TAX EXPENSE	133	144	307	416
NET INCOME	588	526	1,510	2,182
Loss attributable to non-controlling interest	0	0	0	(3)
NET INCOME	$ 588	$ 526	$ 1,510	$ 2,185
Net income per common share - basic (dollars per share)	$ 1.70	$ 1.53	$ 4.37	$ 6.27
Net income per common share - diluted (dollars per share)	$ 1.69	$ 1.52	$ 4.35	$ 6.24
AVERAGE NUMBER OF SHARES OUTSTANDING-BASIC (shares)	346.2	345	345.9	348.4
AVERAGE NUMBER OF SHARES OUTSTANDING—DILUTED (shares)	347.5	346.5	347.2	349.9
Electric
OPERATING REVENUES
TOTAL OPERATING REVENUES	$ 3,669	$ 3,469	$ 8,849	$ 8,309
Gas
OPERATING REVENUES
TOTAL OPERATING REVENUES	373	353	2,312	2,354
OPERATING EXPENSES
Operating costs	67	73	402	640
Steam
OPERATING REVENUES
TOTAL OPERATING REVENUES	49	49	423	425
Non-utility
OPERATING REVENUES
TOTAL OPERATING REVENUES	1	1	3	131
Purchased power
OPERATING EXPENSES
Operating costs	743	796	1,942	1,993
Fuel
OPERATING EXPENSES
Operating costs	27	34	130	241
Other operations and maintenance
OPERATING EXPENSES
Operating costs	$ 986	$ 933	$ 2,841	$ 2,678

CONSOLIDATED STATEMENT OF COMPR

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 588	$ 202	$ 720	$ 526	$ 226	$ 1,430	$ 1,510	$ 2,182
LOSS ATTRIBUTABLE TO NON-CONTROLLING INTEREST	0			0			0	3
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES
Pension and other postretirement benefit plan liability adjustments, net of taxes	0			0			(4)	3
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES	0			0			(4)	3
COMPREHENSIVE INCOME	$ 588			$ 526			$ 1,506	$ 2,188

CONSOLIDATED STATEMENT OF CASH

CONSOLIDATED STATEMENT OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
OPERATING ACTIVITIES
Net income	$ 1,510	$ 2,182
PRINCIPAL NON-CASH CHARGES (CREDITS) TO INCOME
Depreciation and amortization	1,601	1,506
Deferred income taxes	448	99
Rate case amortization and accruals	174	67
Net derivative losses	0	11
Pre-tax loss (gain) on sale of the Clean Energy Businesses	30	(866)
Other non-cash items, net	(96)	(108)
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable – customers, net	(129)	133
Materials and supplies, including fuel oil and gas in storage	(3)	53
Revenue decoupling mechanism receivable	27	(130)
Other receivables, net and other current assets	209	165
Unbilled revenue and net unbilled revenue deferrals	31	78
Prepayments	(902)	(841)
Accounts payable	(199)	(573)
Pensions and retiree benefits obligations, net	(162)	(150)
Pensions and retiree benefits contributions	(21)	(30)
Accrued taxes	(14)	(1)
Accrued interest	159	108
Superfund and environmental remediation costs	(27)	(7)
Distributions from equity investments	15	23
Deferred charges, noncurrent assets, leases, net and other regulatory assets	(677)	(624)
Deferred credits, noncurrent liabilities and other regulatory liabilities	400	(24)
Other current liabilities	(70)	110
NET CASH FLOWS FROM OPERATING ACTIVITIES	2,304	1,181
INVESTING ACTIVITIES
Utility construction expenditures	(3,533)	(3,097)
Cost of removal less salvage	(335)	(289)
Non-utility construction expenditures	0	(141)
Proceeds from sale of the Clean Energy Businesses, net of cash and cash equivalents sold	0	3,927
Other investing activities	(21)	(48)
NET CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES	(3,889)	352
FINANCING ACTIVITIES
Net payment of short-term debt	(229)	(1,160)
Issuance of long-term debt	1,525	500
Retirement of long-term debt	0	(60)
Debt issuance costs	(25)	(5)
Common stock dividends	(824)	(829)
Issuance of common shares for stock plans	45	41
Repurchase of common shares	0	(1,000)
Distribution to noncontrolling interest	0	(4)
NET CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES	492	(2,517)
CASH, TEMPORARY CASH INVESTMENTS, AND RESTRICTED CASH:
NET CHANGE FOR THE PERIOD	(1,093)	(984)
BALANCE AT BEGINNING OF PERIOD	1,195	1,530
BALANCE AT END OF PERIOD	102	546
Total cash, temporary cash investments and restricted cash	102	546
LESS: CHANGE IN CASH AND RESTRICTED CASH BALANCES HELD FOR SALE	9	6
BALANCE AT END OF PERIOD EXCLUDING HELD FOR SALE	93	540
Cash paid during the period for:
Interest, net of capitalized interest	657	624
Income taxes	6	360
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Construction expenditures in accounts payable	496	419
Issuance of common shares for dividend reinvestment	37	20
Equipment
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Equipment acquired but unpaid as of end of period	$ 6	$ 11

CONSOLIDATED BALANCE SHEET (UNA

CONSOLIDATED BALANCE SHEET (UNAUDITED) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
CURRENT ASSETS
Cash and temporary cash investments	$ 93	$ 1,189
Accounts receivable – customers, net allowance for uncollectible accounts	2,567	2,418
Other receivables, net allowance for uncollectible accounts	227	444
Accrued unbilled revenue	617	722
Fuel oil, gas in storage, materials and supplies, at average cost	472	469
Prepayments	1,371	470
Regulatory assets	224	281
Revenue decoupling mechanism receivable	188	203
Fair value of derivative assets	15	52
Assets held for sale	167	163
Other current assets	139	126
TOTAL CURRENT ASSETS	6,080	6,537
INVESTMENTS	1,136	999
UTILITY PLANT, AT ORIGINAL COST
General	4,760	4,835
TOTAL	63,523	61,309
Less: Accumulated depreciation	15,166	14,157
Net	48,357	47,152
Construction work in progress	2,987	2,442
NET UTILITY PLANT	51,344	49,594
NON-UTILITY PLANT
Non-utility property, net accumulated depreciation	12	13
Construction work in progress	1	1
NET PLANT	51,357	49,608
OTHER NONCURRENT ASSETS
Goodwill	408	408
Regulatory assets	5,317	4,607
Pension and retiree benefits	3,440	3,275
Operating lease right-of-use asset	499	533
Fair value of derivative assets	21	48
Other deferred charges and noncurrent assets	387	316
TOTAL OTHER NONCURRENT ASSETS	10,072	9,187
TOTAL ASSETS	68,645	66,331
CURRENT LIABILITIES
Long-term debt due within one year	250	250
Notes payable	2,059	2,288
Accounts payable	1,472	1,775
Customer deposits	434	396
Accrued taxes	63	73
Accrued interest	330	170
Accrued wages	132	125
Fair value of derivative liabilities	109	193
Regulatory liabilities	143	145
System benefit charge	450	444
Operating lease liabilities	116	116
Liabilities held for sale	80	76
Other current liabilities	389	411
TOTAL CURRENT LIABILITIES	6,027	6,462
NONCURRENT LIABILITIES
Provision for injuries and damages	185	188
Pensions and retiree benefits	628	592
Superfund and other environmental costs	1,101	1,118
Asset retirement obligations	538	522
Fair value of derivative liabilities	120	121
Deferred income taxes and unamortized investment tax credits	8,793	8,069
Operating lease liabilities	430	429
Regulatory liabilities	5,037	5,328
Other deferred credits and noncurrent liabilities	450	417
TOTAL NONCURRENT LIABILITIES	17,282	16,784
LONG-TERM DEBT	23,438	21,927
COMMITMENTS, CONTINGENCIES, AND GUARANTEES (Note B, Note G, and Note H)
Common shareholders’ equity	21,898	21,158
TOTAL LIABILITIES AND EQUITY	68,645	66,331
Electric
UTILITY PLANT, AT ORIGINAL COST
Utility plant, at original cost	40,703	39,071
Gas
UTILITY PLANT, AT ORIGINAL COST
Utility plant, at original cost	14,910	14,318
Steam
UTILITY PLANT, AT ORIGINAL COST
Utility plant, at original cost	$ 3,150	$ 3,085

CONSOLIDATED BALANCE SHEET (U_2

CONSOLIDATED BALANCE SHEET (UNAUDITED) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Accounts receivable - customers, allowance for uncollectible accounts	$ 461	$ 360
Other receivables, allowance for uncollectible accounts	24	13
Non-utility property, accumulated depreciation	$ 24	$ 24

CONSOLIDATED STATEMENT OF EQUIT

CONSOLIDATED STATEMENT OF EQUITY (UNAUDITED) - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Capital Stock Expense	Accumulated Other Comprehensive Income (Loss)	Non- controlling Interest
Beginning balance (shares) at Dec. 31, 2022		355
Beginning balance at Dec. 31, 2022	$ 20,889	$ 37	$ 9,803	$ 11,985	$ (1,038)	$ (122)	$ 22	$ 202
Beginning balance (shares) at Dec. 31, 2022					23
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,430			1,433				(3)
Common stock dividends	(288)			(288)
Issuance of common shares for stock plans	15		15
Common stock repurchases (in shares)		(9)			9
Common stock repurchases	(1,008)		(200)		$ (808)
Other comprehensive income (loss)	4						4
Distributions to noncontrolling interest	(4)							(4)
Disposal of the Clean Energy Businesses	(195)							(195)
Ending balance (shares) at Mar. 31, 2023		346
Ending balance at Mar. 31, 2023	$ 20,843	$ 37	9,618	13,130	$ (1,846)	(122)	26	0
Ending balance (shares) at Mar. 31, 2023					32
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock dividends per share (dollars per share)	$ 0.81
Beginning balance (shares) at Dec. 31, 2022		355
Beginning balance at Dec. 31, 2022	$ 20,889	$ 37	9,803	11,985	$ (1,038)	(122)	22	202
Beginning balance (shares) at Dec. 31, 2022					23
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,182
Ending balance (shares) at Sep. 30, 2023		345
Ending balance at Sep. 30, 2023	21,078	$ 37	9,834	13,321	$ (2,017)	(122)	25	0
Ending balance (shares) at Sep. 30, 2023					34
Beginning balance (shares) at Mar. 31, 2023		346
Beginning balance at Mar. 31, 2023	20,843	$ 37	9,618	13,130	$ (1,846)	(122)	26	0
Beginning balance (shares) at Mar. 31, 2023					32
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	226			226
Common stock dividends	(281)			(281)
Issuance of common shares for stock plans	20		20
Common stock repurchases (in shares)		(2)			2
Common stock repurchases	(2)		169		$ (171)
Other comprehensive income (loss)	(1)						(1)
Ending balance (shares) at Jun. 30, 2023		344
Ending balance at Jun. 30, 2023	$ 20,805	$ 37	9,807	13,075	$ (2,017)	(122)	25	0
Ending balance (shares) at Jun. 30, 2023					34
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock dividends per share (dollars per share)	$ 0.81
Net income (loss)	$ 526			526
Common stock dividends	(280)			(280)
Issuance of common shares for stock plans (in shares)		1
Issuance of common shares for stock plans	27		27
Ending balance (shares) at Sep. 30, 2023		345
Ending balance at Sep. 30, 2023	$ 21,078	$ 37	9,834	13,321	$ (2,017)	(122)	25	0
Ending balance (shares) at Sep. 30, 2023					34
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock dividends per share (dollars per share)	$ 0.81
Beginning balance (shares) at Dec. 31, 2023		345
Beginning balance at Dec. 31, 2023	$ 21,158	$ 37	9,861	13,377	$ (2,017)	(122)	22	0
Beginning balance (shares) at Dec. 31, 2023					34
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	720			720
Common stock dividends	(287)			(287)
Issuance of common shares for stock plans (in shares)		1
Issuance of common shares for stock plans	28	$ 1	27
Other comprehensive income (loss)	(4)						(4)
Ending balance (shares) at Mar. 31, 2024		346
Ending balance at Mar. 31, 2024	$ 21,615	$ 38	9,888	13,810	$ (2,017)	(122)	18	0
Ending balance (shares) at Mar. 31, 2024					34
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock dividends per share (dollars per share)	$ 0.83
Beginning balance (shares) at Dec. 31, 2023		345
Beginning balance at Dec. 31, 2023	$ 21,158	$ 37	9,861	13,377	$ (2,017)	(122)	22	0
Beginning balance (shares) at Dec. 31, 2023					34
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,510
Ending balance (shares) at Sep. 30, 2024		346
Ending balance at Sep. 30, 2024	21,898	$ 38	9,955	14,026	$ (2,017)	(122)	18	0
Ending balance (shares) at Sep. 30, 2024					34
Beginning balance (shares) at Mar. 31, 2024		346
Beginning balance at Mar. 31, 2024	21,615	$ 38	9,888	13,810	$ (2,017)	(122)	18	0
Beginning balance (shares) at Mar. 31, 2024					34
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	202			202
Common stock dividends	(287)			(287)
Issuance of common shares for stock plans	30		30
Ending balance (shares) at Jun. 30, 2024		346
Ending balance at Jun. 30, 2024	$ 21,560	$ 38	9,918	13,725	$ (2,017)	(122)	18	0
Ending balance (shares) at Jun. 30, 2024					34
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock dividends per share (dollars per share)	$ 0.83
Net income (loss)	$ 588			588
Common stock dividends	(287)			(287)
Issuance of common shares for stock plans	26		26
Stock awards	11		11
Ending balance (shares) at Sep. 30, 2024		346
Ending balance at Sep. 30, 2024	$ 21,898	$ 38	$ 9,955	$ 14,026	$ (2,017)	$ (122)	$ 18	$ 0
Ending balance (shares) at Sep. 30, 2024					34
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock dividends per share (dollars per share)	$ 0.83

CONSOLIDATED STATEMENT OF EQU_2

CONSOLIDATED STATEMENT OF EQUITY (UNAUDITED) (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023
Statement of Stockholders' Equity [Abstract]
Common stock dividends per share (dollars per share)	$ 0.83	$ 0.83	$ 0.83	$ 0.81	$ 0.81	$ 0.81

CONSOLIDATED INCOME STATEMENT -

CONSOLIDATED INCOME STATEMENT - CECONY (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
OPERATING REVENUES
TOTAL OPERATING REVENUES	$ 4,092	$ 3,872	$ 11,587	$ 11,219
OPERATING EXPENSES
Depreciation and amortization	550	512	1,601	1,506
Taxes, other than income taxes	857	801	2,448	2,282
TOTAL OPERATING EXPENSES	3,230	3,149	9,364	9,340
Operating income (loss)	862	722	2,193	2,745
OTHER INCOME (DEDUCTIONS)
Investment and other income	17	8	46	23
Allowance for equity funds used during construction	8	7	29	20
Other deductions	(17)	(18)	(44)	(57)
TOTAL OTHER INCOME	165	207	507	611
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	1,027	929	2,700	3,356
INTEREST EXPENSE (INCOME)
Interest on long-term debt	275	234	797	719
Other interest expense	47	39	131	78
Allowance for borrowed funds used during construction	(16)	(14)	(45)	(39)
NET INTEREST EXPENSE	306	259	883	758
INCOME BEFORE INCOME TAX EXPENSE	721	670	1,817	2,598
INCOME TAX EXPENSE	133	144	307	416
NET INCOME	588	526	1,510	2,185
Electric
OPERATING REVENUES
TOTAL OPERATING REVENUES	3,669	3,469	8,849	8,309
Gas
OPERATING REVENUES
TOTAL OPERATING REVENUES	373	353	2,312	2,354
OPERATING EXPENSES
Operating costs	67	73	402	640
Steam
OPERATING REVENUES
TOTAL OPERATING REVENUES	49	49	423	425
Purchased power
OPERATING EXPENSES
Operating costs	743	796	1,942	1,993
Fuel
OPERATING EXPENSES
Operating costs	27	34	130	241
Other operations and maintenance
OPERATING EXPENSES
Operating costs	986	933	2,841	2,678
CECONY
OPERATING REVENUES
TOTAL OPERATING REVENUES	3,762	3,590	10,730	10,287
OPERATING EXPENSES
Depreciation and amortization	520	485	1,512	1,428
Taxes, other than income taxes	831	777	2,372	2,207
TOTAL OPERATING EXPENSES	2,959	2,911	8,623	8,537
Operating income (loss)	803	679	2,107	1,750
OTHER INCOME (DEDUCTIONS)
Investment and other income	149	191	452	566
Allowance for equity funds used during construction	7	6	25	17
Other deductions	(18)	(13)	(41)	(33)
TOTAL OTHER INCOME	138	184	436	550
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	941	863	2,543	2,300
INTEREST EXPENSE (INCOME)
Interest on long-term debt	262	220	757	656
Other interest expense	38	32	108	75
Allowance for borrowed funds used during construction	(15)	(13)	(40)	(36)
NET INTEREST EXPENSE	285	239	825	695
INCOME BEFORE INCOME TAX EXPENSE	656	624	1,718	1,605
INCOME TAX EXPENSE	119	109	301	297
NET INCOME	537	515	1,417	1,308
CECONY | Electric
OPERATING REVENUES
TOTAL OPERATING REVENUES	3,376	3,223	8,188	7,722
CECONY | Gas
OPERATING REVENUES
TOTAL OPERATING REVENUES	337	318	2,119	2,140
OPERATING EXPENSES
Operating costs	59	62	352	518
CECONY | Steam
OPERATING REVENUES
TOTAL OPERATING REVENUES	49	49	423	425
CECONY | Purchased power
OPERATING EXPENSES
Operating costs	642	719	1,718	1,802
CECONY | Fuel
OPERATING EXPENSES
Operating costs	27	34	130	241
CECONY | Other operations and maintenance
OPERATING EXPENSES
Operating costs	$ 880	$ 834	$ 2,539	$ 2,341

CONSOLIDATED STATEMENT OF COM_2

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (UNAUDITED) - CECONY - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
NET INCOME	$ 588	$ 526	$ 1,510	$ 2,185
Pension and other postretirement benefit plan liability adjustments, net of taxes	0	0	(4)	3
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES	0	0	(4)	3
COMPREHENSIVE INCOME	588	526	1,506	2,188
CECONY
NET INCOME	537	515	1,417	1,308
Pension and other postretirement benefit plan liability adjustments, net of taxes	0	0	0	(1)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES	0	0	0	(1)
COMPREHENSIVE INCOME	$ 537	$ 515	$ 1,417	$ 1,307

CONSOLIDATED STATEMENT OF CAS_2

CONSOLIDATED STATEMENT OF CASH FLOWS (UNAUDITED) - CECONY - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
OPERATING ACTIVITIES
Net income	$ 1,510	$ 2,185
PRINCIPAL NON-CASH CHARGES (CREDITS) TO INCOME
Depreciation and amortization	1,601	1,506
Deferred income taxes	448	99
Rate case amortization and accruals	174	67
Other non-cash items, net	(96)	(108)
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable – customers, net	(129)	133
Materials and supplies, including fuel oil and gas in storage	(3)	53
Revenue decoupling mechanism receivable	27	(130)
Other receivables, net and other current assets	209	165
Unbilled revenue and net unbilled revenue deferrals	31	78
Prepayments	(902)	(841)
Accounts payable	(199)	(573)
Pensions and retiree benefits obligations, net	(162)	(150)
Pensions and retiree benefits contributions	(21)	(30)
Superfund and environmental remediation costs	(27)	(7)
Accrued taxes	(14)	(1)
Accrued interest	159	108
Deferred charges, noncurrent assets, leases, net and other regulatory assets	(677)	(624)
Deferred credits, noncurrent liabilities and other regulatory liabilities	400	(24)
Other current liabilities	(70)	110
NET CASH FLOWS FROM OPERATING ACTIVITIES	2,304	1,181
INVESTING ACTIVITIES
Utility construction expenditures	(3,533)	(3,097)
Cost of removal less salvage	(335)	(289)
NET CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES	(3,889)	352
FINANCING ACTIVITIES
Net payment of short-term debt	(229)	(1,160)
Issuance of long-term debt	1,525	500
Debt issuance costs	(25)	(5)
NET CASH FLOWS FROM FINANCING ACTIVITIES	492	(2,517)
CASH AND TEMPORARY CASH INVESTMENTS
NET CHANGE FOR THE PERIOD	(1,093)	(984)
BALANCE AT BEGINNING OF PERIOD	1,195	1,530
BALANCE AT END OF PERIOD	102	546
Cash paid during the period for:
Interest, net of capitalized interest	657	624
Income taxes	6	360
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Construction expenditures in accounts payable	496	419
Equipment
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Equipment acquired but unpaid as of end of period	6	11
CECONY
OPERATING ACTIVITIES
Net income	1,417	1,308
PRINCIPAL NON-CASH CHARGES (CREDITS) TO INCOME
Depreciation and amortization	1,512	1,428
Deferred income taxes	553	674
Rate case amortization and accruals	156	52
Other non-cash items, net	(45)	(95)
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable – customers, net	(126)	140
Materials and supplies, including fuel oil and gas in storage	1	36
Revenue decoupling mechanism receivable	26	(128)
Other receivables, net and other current assets	146	(95)
Unbilled revenue and net unbilled revenue deferrals	37	77
Accounts receivable to affiliated companies	(335)	(400)
Prepayments	(714)	(699)
Accounts payable	(206)	(408)
Accounts payable from affiliated companies	2	7
Pensions and retiree benefits obligations, net	(173)	(149)
Pensions and retiree benefits contributions	(21)	(28)
Superfund and environmental remediation costs	(27)	(8)
Accrued interest	156	128
Deferred charges, noncurrent assets, leases, net and other regulatory assets	(562)	(610)
Deferred credits, noncurrent liabilities and other regulatory liabilities	363	(7)
Other current liabilities	(66)	129
NET CASH FLOWS FROM OPERATING ACTIVITIES	2,087	1,221
INVESTING ACTIVITIES
Utility construction expenditures	(3,312)	(2,894)
Cost of removal less salvage	(330)	(284)
NET CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES	(3,642)	(3,178)
FINANCING ACTIVITIES
Net payment of short-term debt	(227)	(502)
Issuance of long-term debt	1,400	500
Debt issuance costs	(24)	(5)
Capital contribution by Con Edison	105	1,720
Dividend to Con Edison	(804)	(792)
NET CASH FLOWS FROM FINANCING ACTIVITIES	450	921
CASH AND TEMPORARY CASH INVESTMENTS
NET CHANGE FOR THE PERIOD	(1,105)	(1,036)
BALANCE AT BEGINNING OF PERIOD	1,138	1,056
BALANCE AT END OF PERIOD	33	20
Cash paid during the period for:
Interest, net of capitalized interest	607	538
Income taxes	64	90
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Construction expenditures in accounts payable	469	399
CECONY | Nonrelated Party
CHANGES IN ASSETS AND LIABILITIES
Accrued taxes	(7)	(42)
CECONY | Related Party
CHANGES IN ASSETS AND LIABILITIES
Accrued taxes	0	(89)
CECONY | Equipment
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Equipment acquired but unpaid as of end of period	$ 6	$ 11

CONSOLIDATED BALANCE SHEET (U_3

CONSOLIDATED BALANCE SHEET (UNAUDITED) - CECONY - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
CURRENT ASSETS
Cash and temporary cash investments	$ 93	$ 1,189
Accounts receivable – customers, net allowance for uncollectible accounts	2,567	2,418
Other receivables, net allowance for uncollectible accounts	227	444
Accrued unbilled revenue	617	722
Fuel oil, gas in storage, materials and supplies, at average cost	472	469
Prepayments	1,371	470
Regulatory assets	224	281
Revenue decoupling mechanism receivable	188	203
Fair value of derivative assets	15	52
Other current assets	139	126
TOTAL CURRENT ASSETS	6,080	6,537
INVESTMENTS	1,136	999
UTILITY PLANT, AT ORIGINAL COST
General	4,760	4,835
TOTAL	63,523	61,309
Less: Accumulated depreciation	15,166	14,157
Net	48,357	47,152
Construction work in progress	2,987	2,442
NET UTILITY PLANT	51,344	49,594
NON-UTILITY PLANT
Non-utility property, net accumulated depreciation of $25 in 2024 and 2023	12	13
NET PLANT	51,357	49,608
OTHER NONCURRENT ASSETS
Regulatory assets	5,317	4,607
Operating lease right-of-use asset	499	533
Pension and retiree benefits	3,440	3,275
Fair value of derivative assets	21	48
Other deferred charges and noncurrent assets	387	316
TOTAL OTHER NONCURRENT ASSETS	10,072	9,187
TOTAL ASSETS	68,645	66,331
CURRENT LIABILITIES
Long-term debt due within one year	250	250
Notes payable	2,059	2,288
Accounts payable	1,472	1,775
Customer deposits	434	396
Accrued taxes	63	73
Accrued interest	330	170
Accrued wages	132	125
Fair value of derivative liabilities	109	193
Regulatory liabilities	143	145
System benefit charge	450	444
Operating lease liabilities	116	116
Other current liabilities	389	411
TOTAL CURRENT LIABILITIES	6,027	6,462
NONCURRENT LIABILITIES
Provision for injuries and damages	185	188
Pensions and retiree benefits	628	592
Superfund and other environmental costs	1,101	1,118
Asset retirement obligations	538	522
Fair value of derivative liabilities	120	121
Deferred income taxes and unamortized investment tax credits	8,793	8,069
Operating lease liabilities	430	429
Regulatory liabilities	5,037	5,328
Other deferred credits and noncurrent liabilities	450	417
TOTAL NONCURRENT LIABILITIES	17,282	16,784
LONG-TERM DEBT	23,438	21,927
COMMITMENTS, CONTINGENCIES, AND GUARANTEES (Note B, Note G, and Note H)
EQUITY
Common shareholders’ equity	21,898	21,158
TOTAL LIABILITIES AND EQUITY	68,645	66,331
CECONY
CURRENT ASSETS
Cash and temporary cash investments	33	1,138
Other receivables, net allowance for uncollectible accounts	208	332
Accrued unbilled revenue	565	678
Fuel oil, gas in storage, materials and supplies, at average cost	421	422
Prepayments	1,043	329
Regulatory assets	193	254
Revenue decoupling mechanism receivable	164	190
Fair value of derivative assets	13	49
Other current assets	127	113
TOTAL CURRENT ASSETS	5,704	5,981
INVESTMENTS	692	608
UTILITY PLANT, AT ORIGINAL COST
General	4,431	4,530
TOTAL	59,683	57,649
Less: Accumulated depreciation	14,116	13,171
Net	45,567	44,478
Construction work in progress	2,688	2,168
NET UTILITY PLANT	48,255	46,646
NON-UTILITY PLANT
Non-utility property, net accumulated depreciation of $25 in 2024 and 2023	2	2
NET PLANT	48,257	46,648
OTHER NONCURRENT ASSETS
Regulatory assets	4,971	4,314
Operating lease right-of-use asset	499	532
Pension and retiree benefits	3,370	3,184
Fair value of derivative assets	20	49
Other deferred charges and noncurrent assets	336	284
TOTAL OTHER NONCURRENT ASSETS	9,196	8,363
TOTAL ASSETS	63,849	61,600
CURRENT LIABILITIES
Long-term debt due within one year	250	250
Notes payable	1,676	1,903
Customer deposits	419	378
Accrued interest	315	159
Accrued wages	120	114
Fair value of derivative liabilities	95	179
Regulatory liabilities	71	107
System benefit charge	409	406
Operating lease liabilities	116	116
Other current liabilities	352	381
TOTAL CURRENT LIABILITIES	5,218	5,694
NONCURRENT LIABILITIES
Provision for injuries and damages	179	185
Pensions and retiree benefits	579	542
Superfund and other environmental costs	1,009	1,026
Asset retirement obligations	535	520
Fair value of derivative liabilities	106	108
Deferred income taxes and unamortized investment tax credits	8,798	7,984
Operating lease liabilities	430	429
Regulatory liabilities	4,561	4,818
Other deferred credits and noncurrent liabilities	365	338
TOTAL NONCURRENT LIABILITIES	16,562	15,950
LONG-TERM DEBT	22,196	20,810
COMMITMENTS, CONTINGENCIES, AND GUARANTEES (Note B, Note G, and Note H)
EQUITY
Common shareholders’ equity	19,873	19,146
TOTAL LIABILITIES AND EQUITY	63,849	61,600
Related Party | CECONY
CURRENT ASSETS
Accounts receivable – customers, net allowance for uncollectible accounts	481	146
CURRENT LIABILITIES
Accounts payable	18	16
Accrued taxes	1	1
Nonrelated Party | CECONY
CURRENT ASSETS
Accounts receivable – customers, net allowance for uncollectible accounts	2,456	2,330
CURRENT LIABILITIES
Accounts payable	1,328	1,629
Accrued taxes	48	55
Electric
UTILITY PLANT, AT ORIGINAL COST
Utility plant, at original cost	40,703	39,071
Electric | CECONY
UTILITY PLANT, AT ORIGINAL COST
Utility plant, at original cost	38,340	36,808
Gas
UTILITY PLANT, AT ORIGINAL COST
Utility plant, at original cost	14,910	14,318
Gas | CECONY
UTILITY PLANT, AT ORIGINAL COST
Utility plant, at original cost	13,762	13,226
Steam
UTILITY PLANT, AT ORIGINAL COST
Utility plant, at original cost	3,150	3,085
Steam | CECONY
UTILITY PLANT, AT ORIGINAL COST
Utility plant, at original cost	$ 3,150	$ 3,085

CONSOLIDATED BALANCE SHEET (U_4

CONSOLIDATED BALANCE SHEET (UNAUDITED) - CECONY (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Accounts receivable - customers, allowance for uncollectible accounts	$ 461	$ 360
Other receivables, allowance for uncollectible accounts	24	13
Non-utility property, accumulated depreciation	24	24
CECONY
Accounts receivable - customers, allowance for uncollectible accounts	448	353
Other receivables, allowance for uncollectible accounts	21	9
Non-utility property, accumulated depreciation	$ 25	$ 25

CONSOLIDATED STATEMENT OF SHARE

CONSOLIDATED STATEMENT OF SHAREHOLDER’S EQUITY (UNAUDITED) - CECONY - USD ($) shares in Millions, $ in Millions	Total	CECONY	Common Stock	Common Stock CECONY	Additional Paid-In Capital	Additional Paid-In Capital CECONY	Retained Earnings	Retained Earnings CECONY	Repurchased Con Edison Stock CECONY	Capital Stock Expense CECONY	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) CECONY
Beginning balance (shares) at Dec. 31, 2022			355	235
Beginning Balance at Dec. 31, 2022		$ 16,878		$ 589		$ 7,419		$ 9,890	$ (962)	$ (62)		$ 4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		604						604
Common stock dividend to Con Edison	$ (288)	(264)					$ (288)	(264)
Capital contribution by Con Edison		1,675				1,675
Other comprehensive loss	4	(1)									$ 4	(1)
Ending balance (shares) at Mar. 31, 2023			346	235
Ending Balance at Mar. 31, 2023		18,892		$ 589		9,094		10,230	(962)	(62)		3
Beginning balance (shares) at Dec. 31, 2022			355	235
Beginning Balance at Dec. 31, 2022		16,878		$ 589		7,419		9,890	(962)	(62)		4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,185	1,308
Ending balance (shares) at Sep. 30, 2023			345	235
Ending Balance at Sep. 30, 2023		19,113		$ 589		9,139		10,406	(962)	(62)		3
Beginning balance (shares) at Mar. 31, 2023			346	235
Beginning Balance at Mar. 31, 2023		18,892		$ 589		9,094		10,230	(962)	(62)		3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		189						189
Common stock dividend to Con Edison	(281)	(264)					(281)	(264)
Capital contribution by Con Edison		26				26
Other comprehensive loss	(1)										(1)
Ending balance (shares) at Jun. 30, 2023			344	235
Ending Balance at Jun. 30, 2023		18,843		$ 589		9,120		10,155	(962)	(62)		3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	526	515						515
Common stock dividend to Con Edison	(280)	(264)					(280)	(264)
Capital contribution by Con Edison		19				19
Ending balance (shares) at Sep. 30, 2023			345	235
Ending Balance at Sep. 30, 2023		19,113		$ 589		9,139		10,406	(962)	(62)		3
Beginning balance (shares) at Dec. 31, 2023			345	235
Beginning Balance at Dec. 31, 2023	21,158	19,146		$ 589		9,139		10,440	(962)	(62)		2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		694						694
Common stock dividend to Con Edison	(287)	(268)					(287)	(268)
Capital contribution by Con Edison		25				25
Other comprehensive loss	(4)										$ (4)
Ending balance (shares) at Mar. 31, 2024			346	235
Ending Balance at Mar. 31, 2024		19,597		$ 589		9,164		10,866	(962)	(62)		2
Beginning balance (shares) at Dec. 31, 2023			345	235
Beginning Balance at Dec. 31, 2023	21,158	19,146		$ 589		9,139		10,440	(962)	(62)		2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,510	1,417
Ending balance (shares) at Sep. 30, 2024			346	235
Ending Balance at Sep. 30, 2024	21,898	19,873		$ 589		9,253		11,053	(962)	(62)		2
Beginning balance (shares) at Mar. 31, 2024			346	235
Beginning Balance at Mar. 31, 2024		19,597		$ 589		9,164		10,866	(962)	(62)		2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		186						186
Common stock dividend to Con Edison	(287)	(268)					(287)	(268)
Capital contribution by Con Edison		55				55
Ending balance (shares) at Jun. 30, 2024			346	235
Ending Balance at Jun. 30, 2024		19,570		$ 589		9,219		10,784	(962)	(62)		2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	588	537						537
Common stock dividend to Con Edison	(287)	(268)					$ (287)	(268)
Capital contribution by Con Edison		25				25
Stock awards	11	9			$ 11	9
Ending balance (shares) at Sep. 30, 2024			346	235
Ending Balance at Sep. 30, 2024	$ 21,898	$ 19,873		$ 589		$ 9,253		$ 11,053	$ (962)	$ (62)		$ 2

General

General	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
General	General These combined notes accompany and form an integral part of the separate interim consolidated financial statements of each of the two separate registrants: Consolidated Edison, Inc. and its subsidiaries (Con Edison) and Consolidated Edison Company of New York, Inc. and its subsidiaries (CECONY). CECONY is a subsidiary of Con Edison and as such its financial condition and results of operations and cash flows, that are presented separately in the CECONY consolidated financial statements, are also consolidated, along with those of Orange and Rockland Utilities, Inc. (O&R), Con Edison Transmission, Inc. (together with its subsidiaries, Con Edison Transmission) and its former subsidiary, Con Edison Clean Energy Businesses, Inc. (together with its subsidiaries, the Clean Energy Businesses), in Con Edison’s consolidated financial statements. On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R and Note S. The term “Utilities” is used in these notes to refer to CECONY and O&R. As used in these notes, the term “Companies” refers to Con Edison and CECONY and, except as otherwise noted, the information in these combined notes relates to each of the Companies. However, CECONY makes no representation as to information contained in these combined notes relating to Con Edison or the subsidiaries of Con Edison other than itself. The separate interim consolidated financial statements of each of the Companies are unaudited but, in the opinion of their respective managements, reflect all adjustments (which include only normally recurring adjustments) necessary for a fair statement of the results for the interim periods presented. The Companies’ separate interim consolidated financial statements should be read together with their separate audited financial statements (including the combined notes thereto) included in Item 8 of their combined Annual Report on Form 10-K for the year ended December 31, 2023, and their separate unaudited financial statements (including the combined notes thereto) included in Part 1, Item 1 of their combined Quarterly Reports on Form 10-Q for the quarterly periods ended March 31, 2024 and June 30, 2024.

Summary of Significant Accounti

Summary of Significant Accounting Policies and Other Matters	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Summary of Significant Accounting Policies and Other Matters	Summary of Significant Accounting Policies and Other Matters Accounting Policies The accounting policies of Con Edison and its subsidiaries conform to generally accepted accounting principles in the United States of America (GAAP). For the Utilities, these accounting principles include the accounting rules for regulated operations and the accounting requirements of the Federal Energy Regulatory Commission (FERC) and the state regulators having jurisdiction. Investments Con Edison's investments consist primarily of the investments of Con Edison Transmission that are accounted for under the equity method and the fair value of the Utilities' supplemental retirement income plan and deferred income plan assets. Investment in Mountain Valley Pipeline, LLC (MVP) In June 2024, the Mountain Valley Pipeline, a 303-mile gas transmission pipeline in West Virginia and Virginia, entered service. The project operator is continuing restoration of the right of way and estimates a total project cost of approximately $8,100 million (excluding allowance for funds used during construction (AFUDC)). Con Edison Transmission's interest in MVP, the company that developed the project, is expected to be approximately 6.6 percent. At September 30, 2024, the carrying value of Con Edison Transmission's investment in MVP was $165 million, and its cash contributions to the joint venture amounted to $530 million. Con Edison records its pro rata share of earnings from its equity investment in MVP, adjusted for accretion of the basis difference and income taxes, on its consolidated income statement. Con Edison's pro rata share of earnings from its equity investment in MVP, adjusted for accretion of the basis difference, was $8 million ($6 million after-tax) and $21 million ($15 million after-tax) for the three and nine months ended September 30, 2024, respectively. Reclassification Certain prior period amounts have been reclassified to conform with the current period presentation. Earnings Per Share Con Edison presents basic and diluted earnings per share (EPS) on the face of its consolidated income statement. Basic EPS is calculated by dividing earnings available to common shareholders (“Net income for common stock” on Con Edison’s consolidated income statement) by the weighted average number of Con Edison common shares outstanding during the period. In the calculation of diluted EPS, weighted average shares outstanding are increased for additional shares that would be outstanding if potentially dilutive securities were converted to common stock. Potentially dilutive securities for Con Edison consist of restricted stock units and deferred stock units for which the average market price of the common shares for the period was greater than the estimated vesting price. For the three and nine months ended September 30, 2024 and 2023, basic and diluted EPS for Con Edison are calculated as follows: For the Three Months Ended September 30, For the Nine Months Ended September 30, (Millions of Dollars, except per share amounts/Shares in Millions) 2024 2023 2024 2023 Net income for common stock $588 $526 $1,510 $2,185 Weighted average common shares outstanding – basic 346.2 345.0 345.9 348.4 Add: Incremental shares attributable to effect of potentially dilutive securities 1.3 1.5 1.3 1.5 Adjusted weighted average common shares outstanding – diluted 347.5 346.5 347.2 349.9 Net Income per common share – basic $1.70 $1.53 $4.37 $6.27 Net Income per common share – diluted $1.69 $1.52 $4.35 $6.24 Reconciliation of Cash, Temporary Cash Investments and Restricted Cash Cash, temporary cash investments and restricted cash are presented on a combined basis in the Companies’ consolidated statements of cash flows. At September 30, 2024 and 2023, cash, temporary cash investments and restricted cash for Con Edison were as follows; CECONY did not have material restricted cash balances as of September 30, 2024 and 2023: At September 30, Con Edison (Millions of Dollars) 2024 2023 Cash and temporary cash investments $93 $539 Restricted cash (a) 9 6 Total cash, temporary cash investments and restricted cash $102 $545 (a) On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R. Con Edison retained one deferred project, Broken Bow II, a 75MW nameplate capacity wind power project located in Nebraska. Con Edison's restricted cash for the 2023 and 2024 periods primarily include restricted cash of Broken Bow II that continued to be classified as held for sale as of September 30, 2024. See Note S. Variable Interest Entities The accounting rules for consolidation address the consolidation of a variable interest entity (VIE) by a business enterprise that is the primary beneficiary. A VIE is an entity that does not have a sufficient equity investment at risk to permit it to finance its activities without additional subordinated financial support, or whose equity investors lack the characteristics of a controlling financial interest. The primary beneficiary is the business enterprise that has the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and either absorbs a significant amount of the VIE’s losses or has the right to receive benefits that could be significant to the VIE. The Companies enter into arrangements including leases, partnerships and electricity purchase agreements, with various entities. As a result of these arrangements, the Companies retain or may retain a variable interest in these entities. CECONY has an ongoing long-term electricity purchase agreement with Brooklyn Navy Yard Cogeneration Partners, LP, a potential VIE. In 2023, a request was made of this counterparty for information necessary to determine whether the entity was a VIE and whether CECONY is the primary beneficiary; however, the information was not made available. The payments for this contract constitute CECONY’s maximum exposure to loss with respect to the potential VIE. Assets Held for Sale Generally, a long-lived asset or business to be sold is classified as held for sale in the period in which management, with approval from the Board of Directors, commits to a plan to sell, and a sale is expected to be completed within one year. During the first nine months of 2022, Con Edison considered strategic alternatives with respect to the Clean Energy Businesses. As described further in Note R, on October 1, 2022, Con Edison's management received authority to commit to a plan to sell the Clean Energy Businesses and entered into a purchase and sale agreement. On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses with the exception of two tax equity interests in three projects and one deferred project, Broken Bow II. Broken Bow II continued to be classified as held for sale as of September 30, 2024. See Note S.

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2024
Regulated Operations [Abstract]
Regulatory Matters	Regulatory Matters Rate Plans O&R New York – Electric In April 2024, O&R filed an update to its January 2024 request to the New York State Public Service Commission (NYSPSC) for an electric rate increase effective January 1, 2025. The company decreased its requested January 2024 rate increase by $7.5 million to $10.7 million. For purposes of illustration, the filing calculated rate increases of $34.8 million and $55 million effective January 2026 and 2027, respectively, based upon the proposed return on common equity of 10.25 percent and a common equity ratio of 50 percent. In May 2024, the New York State Department of Public Service (NYSDPS) submitted testimony in the NYSPSC proceeding in which O&R requested an electric rate increase, effective January 1, 2025. The NYSDPS testimony supports an electric rate decrease of $27.6 million, reflecting, among other things, a 9.50 percent return on common equity and a common equity ratio of 48 percent. O&R New York – Gas In April 2024, O&R filed an update to its January 2024 request to the NYSPSC for a gas rate increase effective January 1, 2025. The company increased its requested January 2024 rate increase by $3.1 million to $17.5 million. For purposes of illustration, the filing calculated rate increases of $22.8 million and $19.2 million effective January 2026 and 2027, respectively, based upon the proposed return on common equity of 10.25 percent and a common equity ratio of 50 percent. In May 2024, the NYSDPS submitted testimony in the NYSPSC proceeding in which O&R requested a gas rate increase, effective January 1, 2025. The NYSDPS testimony supports a gas rate decrease of $2.9 million, reflecting, among other things, a 9.50 percent return on common equity and a common equity ratio of 48 percent. Bill Relief Program In March 2024, CECONY and O&R received $91 million and $9 million, respectively, pursuant to a New York State bill relief program funded by the state that provided a one-time bill credit for electric and gas customers. The program was established to partially offset the costs all customers pay to fund utility energy affordability programs. Other Regulatory Matters In January 2023, CECONY initiated a review of welds on certain gas and steam mains following the company’s discovery of a leak from a gas main weld in Queens, New York. During the course of its review thus far, CECONY discovered a limited number of other non-conforming gas and steam main welds. New York regulations require utilities to perform and record weld films for certain gas and steam main welds. Upon reviewing these films, CECONY determined that in some instances third-party contractors engaged in misconduct by substituting duplicate weld films for different welds, while another third-party contractor had created poor quality weld films. CECONY voluntarily disclosed its initial review and findings to the NYSDPS which, in turn, initiated its own investigation. CECONY also reported the contractors’ misconduct to law enforcement. Given the nature of the non-conforming welds identified, CECONY does not anticipate significant impact to the operation of its gas and steam mains. CECONY continues to investigate this matter, is remediating and monitoring the known non-conforming welds and is cooperating with the NYSDPS on its investigation of this matter. CECONY is unable to estimate the amount or range of its possible loss, if any, related to this matter. At September 30, 2024, CECONY had not accrued a liability related to this matter. In May 2024, the NYSPSC issued an order denying an April 2023 petition by CECONY that requested permission to capitalize costs to implement its new customer billing and information system to the extent those costs exceeded the $421 million cap established in CECONY’s 2020 – 2022 electric and gas rate plans. CECONY’s final costs for the new system were $510 million ($89 million above the $421 million cap in the rate plans). CECONY believes that the incremental costs were both prudent and necessary for the successful deployment of the system for the benefit of its customers. In May 2024, CECONY expensed incremental costs of $51 million for the new system that were previously capitalized, in addition to a $38 million reserve established at December 31, 2023. In June 2024, CECONY filed a petition for rehearing with the NYSPSC. CECONY is unable to predict the NYSPSC's response to its rehearing petition. In January 2018, the NYSPSC issued an order initiating a focused operations audit of the Utilities’ financial accounting for income taxes. The audit is investigating the Utilities’ inadvertent understatement of a portion, the amount of which may be material, of their calculation of total federal income tax expense for ratemaking purposes related to the calculation of plant retirement-related cost of removal. As a result of such understatement, the Utilities accumulated significant income tax regulatory assets ($1,066 million and $14 million for CECONY and O&R, respectively, as of September 30, 2024 and $1,113 million and $18 million for CECONY and O&R, respectively, as of December 31, 2023) which are not earning a return. While the Utilities have properly calculated and paid their federal income taxes and there is no uncertain tax position related to this matter, this understatement of historical income tax expense materially reduced the amount of revenue collected from the Utilities' customers in the past relative to what it should have been. The Utilities’ rate plans have reflected the correct amount of federal income taxes recoverable from customers, including a proportionate recovery of the regulatory asset, beginning with O&R’s rate plans effective November 2015, CECONY’s electric and gas rate plans effective January 2017, and CECONY’s steam plan effective November 2023. As part of the audit, the Utilities plan to pursue a private letter ruling from the Internal Revenue Service (IRS) confirming that the Utilities’ inadvertent understatement of prior years’ income tax expense constitutes a normalization violation that can be cured through an increase in future years’ revenue requirements until such time as the regulatory asset is fully recovered in rates, and not through a write-down of all or a portion of the Utilities’ regulatory asset. Under Accounting Standards Codification Topic (ASC) 740, the Utilities recorded an unfunded deferred federal income tax liability (with a gross-up amount) and a corresponding regulatory asset. The income tax regulatory assets are netted against the related regulatory liability for future income tax and are shown in the line “Future income tax” in the following table of Regulatory Assets and Liabilities and on the Companies’ consolidated balance sheets in the line “Regulatory liabilities.” Management’s assessment is that the income tax regulatory assets as of September 30, 2024 are probable of collection through future rates. The IRS provides safe harbor relief for inadvertent normalization violations through the jurisdictional rate setting process of including in rates adequate revenue to fully recover the deferred tax balance. However, the Utilities would record a liability or impair a portion of the regulatory assets associated with this understatement if the NYSPSC were to issue an order that required the Utilities to write off all or a portion of their existing regulatory asset. The Utilities are unable to estimate the amount or range of their possible loss, if any, related to this matter. At September 30, 2024, the Utilities had not accrued a liability related to this matter. Regulatory Assets and Liabilities Regulatory assets and liabilities at September 30, 2024 and December 31, 2023 were comprised of the following items: Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Regulatory assets System peak reduction and energy efficiency programs $1,204 $1,095 $1,172 $1,075 Environmental remediation costs 1,093 1,105 1,010 1,022 COVID - 19 pandemic deferrals 888 789 875 782 Revenue taxes 525 476 503 455 Legacy meters (a) 420 17 405 — Property tax reconciliation 176 169 176 169 Deferred storm costs 169 206 67 115 Deferred derivative losses - long term 154 163 138 148 Electric vehicle make ready 115 73 105 68 MTA power reliability deferral 38 61 38 61 Gas service line deferred costs 23 43 23 43 Unrecognized pension and other postretirement costs (b) 10 — 10 — Pension and other postretirement benefits deferrals 5 48 5 39 Other 497 362 444 337 Regulatory assets – noncurrent 5,317 4,607 4,971 4,314 Deferred derivative losses - short term 165 269 151 253 Recoverable energy costs 59 12 42 1 Regulatory assets – current 224 281 193 254 Total Regulatory Assets $5,541 $4,888 $5,164 $4,568 Regulatory liabilities Allowance for cost of removal less salvage $1,470 $1,456 $1,269 $1,266 Future income tax* 1,324 1,535 1,209 1,404 Unrecognized pension and other postretirement costs (b) 787 943 739 867 Pension and other postretirement benefit deferrals 370 284 312 233 Net unbilled revenue deferrals 260 278 260 278 Late payment charge deferral 227 167 221 161 System benefit charge carrying charge 111 92 106 88 Net proceeds from sale of property 31 48 30 47 Deferred derivative gains - long term 19 49 19 49 Settlement of prudence proceeding 10 11 10 11 Other 428 465 386 414 Regulatory liabilities – noncurrent 5,037 5,328 4,561 4,818 Refundable energy costs 81 71 43 36 Revenue decoupling mechanism 33 — — — Deferred derivative gains - short term 29 74 28 71 Regulatory liabilities – current 143 145 71 107 Total Regulatory Liabilities $5,180 $5,473 $4,632 $4,925 * See "Other Regulatory Matters," above. (a) Pursuant to their rate plans, CECONY and O&R are recovering the costs of legacy meters over a 15-year period beginning January 1, 2024 and a 12-year period beginning January 1, 2022, respectively. (b) Unrecognized pension and other postretirement costs represent the deferrals associated with the accounting rules for retirement benefits. In general, the Utilities receive or are being credited with a return at the Other Customer-Provided Capital rate for regulatory assets that have not been included in rate base, and receive or are being credited with a return at the pre-tax weighted average cost of capital once the asset is included in rate base. Similarly, the Utilities pay to or credit customers with a return at the Other Customer-Provided Capital rate for regulatory liabilities that have not been included in rate base, and pay to or credit customers with a return at the pre-tax weighted average cost of capital once the liability is included in rate base. The Other Customer-Provided Capital rate for the nine months ended September 30, 2024 and the year ended December 31, 2023 was 5.95 percent and 5.20 percent, respectively. In general, the Utilities are receiving or being credited with a return on their regulatory assets for which a cash outflow has been made ($3,095 million and $2,541 million for Con Edison, and $2,873 million and $2,359 million for CECONY at September 30, 2024 and December 31, 2023, respectively). Regulatory assets of RECO for which a cash outflow has been made ($24 million at September 30, 2024 and December 31, 2023) are not receiving or being credited with a return. RECO recovers regulatory assets over a period of up to four years or until they are addressed in its next base rate case in accordance with the rate provisions approved by the NJBPU. Regulatory liabilities are treated in a consistent manner. Regulatory assets that represent future financial obligations and were deferred in accordance with the Utilities’ rate plans or orders issued by state regulators do not earn a return until such time as a cash outlay has been made. Regulatory liabilities are treated in a consistent manner. At September 30, 2024 and December 31, 2023, regulatory assets for Con Edison and CECONY that did not earn a return consisted of the following items: Regulatory Assets Not Earning a Return* Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Environmental remediation costs $1,093 $1,105 $1,009 $1,022 Revenue taxes 558 490 535 470 COVID-19 deferral for uncollectible accounts receivable 391 291 384 288 Deferred derivative losses - current 165 269 152 253 Deferred derivative losses - long term 154 163 138 148 Unrecognized pension and other postretirement costs 10 — 10 — Other 75 29 63 28 Total $2,446 $2,347 $2,291 $2,209 *This table presents regulatory assets not earning a return for which no cash outlay has been made. The recovery periods for regulatory assets for which a cash outflow has not been made and that do not earn a return have not yet been determined, except as noted below, and are expected to be determined pursuant to the Utilities’ future rate plans to be filed or orders issued by the state regulators in connection therewith. The Utilities recover unrecognized pension and other postretirement costs over 10 years, and the portion of investment gains or losses are recognized in expense over 15 years, pursuant to NYSPSC policy. The deferral for revenue taxes represents the New York State metropolitan transportation business tax surcharge on the cumulative temporary differences between the book and tax basis of assets and liabilities of the Utilities, as well as the difference between taxes collected and paid by the Utilities to fund mass transportation. The Utilities recover the majority of the revenue taxes over the remaining book lives of the electric and gas plant assets, as well as the steam plant assets for CECONY. The Utilities recover deferred derivative losses – current within one year, and noncurrent generally within three years.

Capitalization

Capitalization	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Capitalization	Capitalization In May 2024, CECONY issued $400 million aggregate principal amount of 5.375 percent debentures, due 2034 and $1,000 million aggregate principal amount of 5.7 percent debentures, due 2054. In September 2024, O&R issued $125 million aggregate principal amount of 5.41 percent debentures, due 2054. In October 2024, all of the $224.6 million of Series 2010A tax-exempt bonds issued for the benefit of CECONY, bearing interest at a weekly rate, were called for redemption in November 2024. The carrying amounts and fair values of long-term debt at September 30, 2024 and December 31, 2023 were: (Millions of Dollars) 2024 2023 Long-Term Debt (including current portion) (a) Carrying Fair Carrying Fair Con Edison (b) $23,688 $22,535 $22,177 $20,525 CECONY $22,446 $21,371 $21,060 $19,517 (a) Amounts shown are net of unamortized debt expense and unamortized debt discount of $237 million and $229 million for Con Edison and CECONY, respectively, as of September 30, 2024 and $222 million and $215 million for Con Edison and CECONY, respectively, as of December 31, 2023. (b) Amounts shown exclude the debt of Broken Bow II, a deferred project that was classified as held for sale as of December 31, 2023. The carrying value and fair value of Broken Bow II's long-term debt, including the current portion, as of September 30, 2024 was $61 million and $58 million, respectively. On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R and Note S.

Short-Term Borrowing

Short-Term Borrowing	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Short-Term Borrowing	Short-Term Borrowing In March 2024, CECONY entered into a 364-Day Revolving Credit Agreement (the CECONY Credit Agreement) that replaced a March 2023 CECONY 364-Day Credit Agreement under which banks are committed to provide loans up to $500 million on a revolving credit basis. The CECONY Credit Agreement expires in March 2025 and supports CECONY’s commercial paper program. Loans issued under the CECONY Credit Agreement may also be used for other general corporate purposes. Any borrowings under the CECONY Credit Agreement would generally be at variable interest rates. The banks’ commitments under the CECONY Credit Agreement are subject to certain conditions, including that there be no event of default under the CECONY Credit Agreement. The commitments are not subject to maintenance of credit rating levels or the absence of a material adverse change. Upon a change of control of, or upon an event of default by CECONY under the CECONY Credit Agreement, the banks may terminate their commitments and declare any amounts owed by CECONY immediately due and payable. Events of default include, among others, CECONY exceeding at any time of a ratio of consolidated debt to consolidated total capital of 0.65 to 1; CECONY having liens on its assets in an aggregate amount exceeding 10 percent of its consolidated net tangible assets, subject to certain exceptions; CECONY or any of its material subsidiaries failing to make one or more payments in respect of material financial obligations (in excess of an aggregate $150 million of debt or derivative obligations other than non-recourse debt); the occurrence of an event or condition which results in the acceleration of the maturity of any material debt (in excess of an aggregate $150 million of debt other than non-recourse debt) or enables the holders of such debt to accelerate the maturity thereof; and other customary events of default. Interest and fees charged reflect CECONY's credit rating. At September 30, 2024, Con Edison had $2,059 million of commercial paper outstanding of which $1,676 million was outstanding under CECONY’s program. The weighted average interest rate at September 30, 2024 was 5.1 percent for both Con Edison and CECONY. At December 31, 2023, Con Edison had $2,288 million of commercial paper outstanding of which $1,903 million was outstanding under CECONY’s program. The weighted average interest rate at December 31, 2023 was 5.6 percent for both Con Edison and CECONY.

Pension Benefits

Pension Benefits	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Pension Benefits	Pension Benefits Total Periodic Benefit Credit The components of the Companies’ total periodic benefit credit for the three and nine months ended September 30, 2024 and 2023 were as follows: For the Three Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Service cost – including administrative expenses $44 $40 $42 $38 Interest cost on projected benefit obligation 160 162 151 153 Expected return on plan assets (282) (279) (269) (265) Recognition of net actuarial gain (1) (58) (2) (55) Recognition of prior service credit (4) (4) (5) (5) TOTAL PERIODIC BENEFIT CREDIT $(83) $(139) $(83) $(134) Cost capitalized (22) (19) (21) (18) Reconciliation to rate level 12 72 10 66 Total credit recognized $(93) $(86) $(94) $(86) For the Nine Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Service cost – including administrative expenses $133 $122 $126 $113 Interest cost on projected benefit obligation 481 486 453 458 Expected return on plan assets (846) (837) (807) (795) Recognition of net actuarial gain (4) (174) (5) (164) Recognition of prior service credit (13) (12) (15) (15) TOTAL PERIODIC BENEFIT CREDIT $(249) $(415) $(248) $(403) Cost capitalized (68) (61) (65) (58) Reconciliation to rate level 39 218 31 202 Total credit recognized $(278) $(258) $(282) $(259) Components of net periodic benefit credit other than service cost are presented outside of operating income on the Companies' consolidated income statements, and only the service cost component is eligible for capitalization. Accordingly, the service cost component is included in the line "Other operations and maintenance" and the non-service cost components are included in the lines "Other income" and "Other deductions" in the Companies' consolidated income statements. Expected Contributions Based on esti mates as of September 30, 2024, the Companies expect to make contributions to the pension plans during 2024 of $25 million (of which $22 million is to be made by CECONY). The Companies’ policy is to fund the total periodic benefit cost of the qualified plan to the extent tax deductible and to also contribute to the non-qualified supplemental pension plans. No funding is anticipated for the qualified plan during 2024, and during the first nine months of 2024, the Companies contributed $15 million to the non-qualified supplemental pension plans, $13 million of which was contributed by CECONY. CECONY also contributed $12 million to the external trust for its non-qualified supplemental pension plan.

Other Postretirement Benefits

Other Postretirement Benefits	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Other Postretirement Benefits	Other Postretirement Benefits Total Periodic Benefit Credit The components of the Companies’ total periodic other postretirement benefit credit for the three and nine months ended September 30, 2024 and 2023 were as follows: For the Three Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Service cost - including administrative expenses $3 $4 $3 $3 Interest cost on projected other postretirement benefit obligation 12 14 10 12 Expected return on plan assets (17) (18) (14) (14) Recognition of net actuarial gain (5) (4) (4) (2) TOTAL PERIODIC OTHER POSTRETIREMENT CREDIT $(7) $(4) $(5) $(1) Cost capitalized (2) (2) (1) (2) Reconciliation to rate level 4 1 3 — Total credit recognized $(5) $(5) $(3) $(3) For the Nine Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Service cost - including administrative expenses $9 $11 $8 $9 Interest cost on projected other postretirement benefit obligation 35 43 30 37 Expected return on plan assets (51) (53) (41) (42) Recognition of net actuarial gain (14) (12) (11) (6) Recognition of prior service credit (1) (1) — — TOTAL PERIODIC OTHER POSTRETIREMENT CREDIT $(22) $(12) $(14) $(2) Cost capitalized (4) (5) (4) (4) Reconciliation to rate level 12 2 10 (2) Total credit recognized $(14) $(15) $(8) $(8) For information about the presentation of the components of other postretirement benefit credit , see Note E. Contributions

Environmental Matters

Environmental Matters	9 Months Ended
	Sep. 30, 2024
Environmental Remediation Obligations [Abstract]
Environmental Matters	Environmental Matters Superfund Sites Hazardous substances, such as asbestos, polychlorinated biphenyls (PCBs) and coal tar, have been used or generated in the course of operations of the Utilities and their predecessors and are present at sites and in facilities and equipment they currently or previously owned, including sites at which gas was manufactured or stored. The Federal Comprehensive Environmental Response, Compensation and Liability Act of 1980 and similar state statutes (Superfund) impose joint and several liability, regardless of fault, upon generators of hazardous substances for investigation and remediation costs (which include costs of demolition, removal, disposal, storage, replacement, containment and monitoring) and natural resource damages. Liability under these laws can be material and may be imposed for contamination from past acts, even though such past acts may have been lawful at the time they occurred. The sites at which the Utilities have been asserted to have liability under these laws, including their manufactured gas plant sites and any neighboring areas to which contamination may have migrated, are referred to herein as “Superfund Sites.” For Superfund Sites where there are other potentially responsible parties and the Utilities are not managing the site investigation and remediation, the accrued liability represents an estimate of the amount the Utilities will need to pay to investigate and, where determinable, discharge their related obligations. For Superfund Sites (including the manufactured gas plant sites) for which one of the Utilities is managing the investigation and remediation, the accrued liability represents an estimate of the company's share of the undiscounted cost to investigate the sites and, for sites that have been investigated in whole or in part, the cost to remediate the sites, if remediation is necessary and if a reasonable estimate of such cost can be made. Remediation costs are estimated in light of the information available, applicable remediation standards and experience with similar sites. The accrued liabilities and regulatory assets related to Superfund Sites at September 30, 2024 and December 31, 2023 were as follows: Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Accrued Liabilities: Manufactured gas plant sites $996 $1,016 $904 $924 Other Superfund Sites 105 102 105 102 Total $1,101 $1,118 $1,009 $1,026 Regulatory assets $1,093 $1,105 $1,010 $1,022 Most of the accrued Superfund Site liability relates to sites that have been investigated, in whole or in part. However, for some of the sites, the extent and associated cost of the required remediation has not yet been determined. As investigations progress and information pertaining to the required remediation becomes available, the Utilities expect that additional liability may be accrued, the amount of which is not presently determinable but may be material. The Utilities defer prudently incurred investigation and remediation costs as regulatory assets (for subsequent recovery through rates). Environmental investigation and remediation costs incurred related to Superfund Sites for the three and nine months ended September 30, 2024 and 2023 were as follows: For the Three Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Remediation costs incurred $12 $1 $12 $1 For the Nine Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Remediation costs incurred $27 $8 $27 $8 Insurance and other third-party recoveries received by Con Edison or CECONY were immaterial for the three and nine months ended September 30, 2024 and 2023. Con Edison and CECONY estimated that for their manufactured gas plant sites (including CECONY’s Astoria site), the aggregate undiscounted potential liability for the investigation and remediation of coal tar and/or other environmental contaminants could range up to $3,440 million and $3,295 million, respectively. These estimates were based on the assumption that there is contamination at all sites, including those that have not yet been fully investigated and additional assumptions about the extent of the contamination and the type and extent of the remediation that may be required. Actual experience may be materially different. Asbestos Proceedings Suits have been brought in New York State and federal courts against the Utilities and many other defendants, wherein a large number of plaintiffs sought large amounts of compensatory and punitive damages for deaths and injuries allegedly caused by exposure to asbestos at various premises of the Utilities. The suits that have been resolved, that are many, have been resolved without any payment by the Utilities, or for amounts that were not, in the aggregate, material to them. The amounts specified in all the remaining thousands of suits total billions of dollars; however, the Utilities believe that these amounts are greatly exaggerated, based on the disposition of previous claims. At September 30, 2024, Con Edison and CECONY have accrued their estimated aggregate undiscounted potential liabilities for these suits and additional suits that may be brought through 2035 as shown in the following table. These estimates were based upon a combination of modeling, historical data analysis and risk factor assessment. Courts have applied, and may continue to apply, different standards for determining liability in asbestos suits than the standard that applied historically. As a result, the Companies currently believe that there is a reasonable possibility of an exposure to loss in excess of the liability accrued for the suits. The Companies are unable to estimate the amount or range of such loss. In addition, certain current and former employees have claimed or are claiming workers’ compensation benefits based on alleged disability from exposure to asbestos. CECONY is permitted to defer as regulatory assets (for subsequent recovery through rates) costs incurred for its asbestos lawsuits and workers’ compensation claims. The accrued liability for asbestos suits and workers’ compensation proceedings (including those related to asbestos exposure) and the amounts deferred as regulatory assets or liabilities for the Companies at September 30, 2024 and December 31, 2023 were as follows: Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Accrued liability – asbestos suits $8 $8 $7 $7 Regulatory assets – asbestos suits $8 $8 $7 $7 Accrued liability – workers’ compensation $55 $56 $53 $54 Regulatory liabilities – workers’ compensation $18 $17 $18 $17

Material Contingencies

Material Contingencies	9 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Material Contingencies	10 years Total (Millions of Dollars) Con Edison Transmission $54 $— $54 Broken Bow II — 9 9 Total $54 $9 $63 Con Edison Transmission — Con Edison has guaranteed payment by Con Edison Transmission of the contributions Con Edison Transmission agreed to make to New York Transco LLC (New York Transco). Con Edison Transmission owns a 45.7 percent interest in New York Transco’s New York Energy Solution project, the majority of which has been completed. Guarantee amount shown includes the maximum possible required amount of Con Edison Transmission's contributions for the remainder of this project as calculated based on the assumptions that the project is completed at 175 percent of its estimated remaining costs and New York Transco does not use any debt financing for the project. Broken Bow II —" id="sjs-B4">Material Contingencies Manhattan Explosion and Fire On March 12, 2014, two multi-use five-story tall buildings located on Park Avenue between 116 th and 117 th Streets in Manhattan were destroyed by an explosion and fire. CECONY had delivered gas to the buildings through service lines from a distribution main located below ground on Park Avenue. Eight people died and more than 50 people were injured. Additional buildings were also damaged. The National Transportation Safety Board (NTSB) investigated. The parties to the investigation included CECONY, the City of New York, the Pipeline and Hazardous Materials Safety Administration and the NYSPSC. In June 2015, the NTSB issued a final report concerning the incident, its probable cause and safety recommendations. The NTSB determined that the probable cause of the incident was (1) the failure of a defective fusion joint at a service tee (which joined a plastic service line to a plastic distribution main) installed by CECONY that allowed gas to leak from the distribution main and migrate into a building where it ignited and (2) a breach in a city sewer line that allowed groundwater and soil to flow into the sewer, resulting in a loss of support for the distribution main, that caused it to sag and overstressed the defective fusion joint. The NTSB also made safety recommendations, including recommendations to CECONY that addressed its procedures for the preparation and examination of plastic fusions, training of its staff on conditions for notifications to the city’s Fire Department and extension of its gas main isolation valve installation program. In February 2017, the NYSPSC approved a settlement agreement with CECONY related to the NYSPSC's investigations of the incident and the practices of qualifying persons to perform plastic fusions. Pursuant to the agreement, CECONY provided $27 million of future benefits to customers (for which it accrued a regulatory liability) and did not recover from customers $126 million of costs for gas emergency response activities that it had previously incurred and expensed. Lawsuits are pending against CECONY seeking generally unspecified damages and, in some cases, punitive damages, for wrongful death, personal injury, property damage and business interruption. CECONY notified its insurers of the incident and believes that the policies in force at the time of the incident will cover CECONY’s costs, in excess of a required retention (the amount of which is not material), to satisfy any liability it may have for damages in connection with the incident. During 2020, CECONY accrued its estimated liability for the suits of $40 million and an insurance receivable in the same amount, and such estimated liability and receivable did not change as of September 30, 2024. Other Contingencies For additional contingencies, see "Other Regulatory Matters" in Note B, Note G and “Uncertain Tax Positions” in Note J. Guarantees Con Edison and its subsidiaries have entered into various agreements providing financial or performance assurance primarily to third parties on behalf of their subsidiaries. In addition, Con Edison provided guarantees to third parties on behalf of the Clean Energy Businesses, all of which were transferred to the buyer of the Clean Energy Businesses, RWE Aktiengesellschaft (RWE). Maximum amounts guaranteed by Con Edison and its subsidiaries under these agreements totaled $175 million at December 31, 2023, and there were no guarantees related to the Clean Energy Businesses at September 30, 2024. A summary, by type and term, of Con Edison's total guarantees under these agreements at September 30, 2024 is as follows: Guarantee Type 0 – 3 years > 10 years Total (Millions of Dollars) Con Edison Transmission $54 $— $54 Broken Bow II — 9 9 Total $54 $9 $63 Con Edison Transmission — Con Edison has guaranteed payment by Con Edison Transmission of the contributions Con Edison Transmission agreed to make to New York Transco LLC (New York Transco). Con Edison Transmission owns a 45.7 percent interest in New York Transco’s New York Energy Solution project, the majority of which has been completed. Guarantee amount shown includes the maximum possible required amount of Con Edison Transmission's contributions for the remainder of this project as calculated based on the assumptions that the project is completed at 175 percent of its estimated remaining costs and New York Transco does not use any debt financing for the project. Broken Bow II —

Leases

Leases	9 Months Ended
	Sep. 30, 2024
Leases [Abstract]
Leases	Leases Operating lease cost and cash paid for amounts included in the measurement of lease liabilities for the three and nine months ended September 30, 2024 and 2023 were as follows: For the Three Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Operating lease cost $17 $17 $17 $17 Operating lease cash flows $6 $6 $6 $6 For the Nine Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023(a) 2024 2023 Operating lease cost $50 $53 $49 $49 Operating lease cash flows $15 $17 $14 $14 (a) Amounts for Con Edison include amounts for the Clean Energy Businesses through February 2023. On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R and Note S. At September 30, 2024, CECONY had two operating lease agreements for battery storage facilities that had not yet commenced operation. Both leases have a lease term of 15 years, and are expected to commence operation within two
Leases	Leases Operating lease cost and cash paid for amounts included in the measurement of lease liabilities for the three and nine months ended September 30, 2024 and 2023 were as follows: For the Three Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Operating lease cost $17 $17 $17 $17 Operating lease cash flows $6 $6 $6 $6 For the Nine Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023(a) 2024 2023 Operating lease cost $50 $53 $49 $49 Operating lease cash flows $15 $17 $14 $14 (a) Amounts for Con Edison include amounts for the Clean Energy Businesses through February 2023. On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R and Note S. At September 30, 2024, CECONY had two operating lease agreements for battery storage facilities that had not yet commenced operation. Both leases have a lease term of 15 years, and are expected to commence operation within two

Income Tax

Income Tax	9 Months Ended
	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Income Tax	Income Tax Con Edison’s income tax expense was $133 million and $144 million for the three months ended September 30, 2024 and September 30, 2023, respectively. The decrease in income tax expense is primarily due to non-recurring state income taxes in 2023 from the sale of all of the stock of the Clean Energy Businesses. CECONY’s income tax expense was $119 million and $109 million for the three months ended September 30, 2024 and September 30, 2023, respectively. The increase in income tax expense is primarily due to higher income before income tax expense. Reconciliation of the difference between income tax expense and the amount computed by applying the prevailing statutory income tax rate to income before income taxes for the three months ended September 30, 2024 and 2023 is as follows: For the Three Months Ended September 30, Con Edison CECONY (% of Pre-tax income) 2024 2023 2024 2023 STATUTORY TAX RATE Federal 21 % 21 % 21 % 21 % Changes in computed taxes resulting from: State income tax, net of federal income taxes 5 8 5 5 Amortization of excess deferred federal income taxes (7) (6) (7) (7) Cost of removal 1 1 1 1 Allowance for uncollectible accounts, net of COVID-19 assistance (1) (2) (1) (2) Changes in state apportionments, net of federal income taxes — 1 — — Other — (2) (1) (1) Effective tax rate 19 % 21 % 18 % 17 % Con Edison’s income tax expense was $307 million and $416 million for the nine months ended September 30, 2024 and September 30, 2023, respectively. The decrease in income tax expense is primarily due to lower income before income tax expense, offset in part by the absence of a tax benefit from the recognition of deferred unamortized investment tax credits, both related to the sale of the Clean Energy Businesses in 2023. CECONY’s income tax expense was $301 million and $297 million for the nine months ended September 30, 2024 and September 30, 2023, respectively. The increase in income tax expense is primarily due to higher income before income tax expense, offset in part by higher amortization of excess deferred federal income taxes. Reconciliation of the difference between income tax expense and the amount computed by applying the prevailing statutory income tax rate to income before income taxes for the nine months ended September 30, 2024 and 2023 is as follows: For the Nine Months Ended September 30, Con Edison CECONY (% of Pre-tax income) 2024 2023 2024 2023 STATUTORY TAX RATE Federal 21 % 21 % 21 % 21 % Changes in computed taxes resulting from: State income tax, net of federal income taxes 5 5 5 5 Cost of removal 2 1 2 2 Other plant-related items (1) — — (1) Renewable energy credits (1) (1) — — Amortization of excess deferred federal income taxes (8) (5) (9) (8) Other (1) — (1) — Impacts from the sale of the Clean Energy Businesses: Changes in state apportionments, net of federal income taxes — (1) — — Deferred unamortized ITC recognized on sale of subsidiary — (4) — — Effective tax rate 17 % 16 % 18 % 19 % In April 2023, the IRS released Revenue Procedure 2023-15, which provides a safe harbor method of accounting that taxpayers may use to determine whether certain expenditures to maintain, repair, replace, or improve natural gas transmission and distribution property must be capitalized as improvements by the taxpayer or deducted for federal income tax purposes in the current tax year. This revenue procedure also provides procedures for taxpayers to obtain automatic consent to change their method of accounting to the safe harbor method of accounting. Con Edison adopted the safe harbor rules on its 2023 federal and state returns and recorded a reduction in its current tax payable and an increase in accumulated deferred tax liabilities of $457 million, $418 million of which is for CECONY and $39 million of which is for O&R, to reflect the cumulative impact of this change in accounting method for the Utilities. Corporate Alternative Minimum Tax On August 16, 2022, the Inflation Reduction Act (IRA) was signed into law and implemented a new corporate alternative minimum tax (CAMT) that imposes a 15 percent tax on modified GAAP net income. Pursuant to the IRA, corporations are entitled to a tax credit (minimum tax credit) to the extent the CAMT liability exceeds the regular tax liability. This amount can be carried forward indefinitely and used in future years when regular tax exceeds the CAMT. Beginning in 2024, based on the existing statute, the Companies are subject to and report the CAMT in their Consolidated Income Statements, Consolidated Statements of Cash Flows and the Consolidated Balance Sheets. The Companies accrued a CAMT liability of $73 million, $64 million of which is for CECONY, before the application of general business credits, with an offsetting deferred tax asset representing the minimum tax credit carryforward, for the nine months ended September 30, 2024. The deferred tax asset related to the minimum tax credit carryforward will be realized to the extent the Companies’ consolidated deferred tax liabilities exceed the minimum tax credit carryforward. The Companies’ deferred tax liabilities are expected to exceed the minimum tax credit carryforward for the foreseeable future and thus no valuation allowance is required. The Companies are continuing to assess the impacts of the IRA on their financial statements and will update estimates based on future guidance to be issued by the Department of the Treasury. Uncertain Tax Positions At September 30, 2024, the estimated liability for uncertain tax positions for Con Edison was $13 million, $9 million of which is for CECONY). For the nine months ended September 30, 2024, Con Edison recognized $2 million, all of which is for CECONY, of income tax expense related to current year positions. Con Edison reasonably expects to resolve within the next twelve months approximately $3 million (the entire amount attributable to CECONY) of various federal uncertainties due to the expected completion of ongoing tax examinations, of which the entire amount, if recognized, would reduce their effective tax rate. The total amount of unrecognized tax benefits, if recognized, that would reduce Con Edison’s effective tax rate is $13 million ($12 million, net of federal income taxes) with $9 million attributable to CECONY. The Companies recognize interest on liabilities for uncertain tax positions in interest expense and would recognize penalties, if any, in operating expenses in the Companies’ consolidated income statements. For the nine months ended September 30, 2024 and 2023, the Companies recognized an immaterial amount of interest expense and no penalties for uncertain tax positions in their consolidated income statements. At September 30, 2024 and December 31, 2023, the Companies recognized an immaterial amount of accrued interest on their consolidated balance sheets. In February 2024, New York State completed its examination of the Companies' New York State income and franchise tax returns for tax years 2015 through 2021 with no changes. The Companies' return for tax year 2022 remains open under the statute of limitations.

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition The following table presents, for the three and nine months ended September 30, 2024 and 2023, revenue from contracts with customers as defined in ASC 606, "Revenue from Contracts with Customers," as well as additional revenue from sources other than contracts with customers, disaggregated by major source. For the Three Months Ended September 30, 2024 For the Three Months Ended September 30, 2023 (Millions of Dollars) Revenues from contracts with customers Other revenues (a) Total operating revenues Revenues from contracts with customers Other revenues (a) Total operating revenues CECONY Electric $3,493 ($117) 3,376 $3,195 $28 $3,223 Gas 364 (27) 337 338 (20) 318 Steam 52 (3) 49 46 3 49 Total CECONY $3,909 $(147) $3,762 $3,579 $11 $3,590 O&R Electric 309 (16) 293 $242 $4 $246 Gas 6 30 36 31 4 35 Total O&R $315 $14 $329 $273 $8 $281 Con Edison Transmission 1 — 1 1 — 1 Other (b) — — — — — — Total Con Edison $4,225 $(133) $4,092 $3,853 $19 $3,872 (a) For the Utilities, this includes primarily revenue or negative revenue adjustments from alternative revenue programs, such as the revenue decoupling mechanisms under their New York electric and gas rate plans. (b) Other includes the parent company, Con Edison's tax equity investments, the deferred project held for sale and consolidation adjustments. See Note S. For the Nine Months Ended September 30, 2024 For the Nine Months Ended September 30, 2023 (Millions of Dollars) Revenues from contracts with customers Other revenues (a) Total operating revenues Revenues from contracts with customers Other revenues (a) Total operating revenues CECONY Electric $8,300 $(112) $8,188 $7,449 $273 $7,722 Gas 2,177 (58) 2,119 2,117 23 2,140 Steam 436 (13) 423 414 11 425 Total CECONY $10,913 $(183) $10,730 $9,980 $307 $10,287 O&R Electric $688 (26) $662 $574 $14 $588 Gas 173 20 193 211 4 215 Total O&R $861 $(6) $855 $785 $18 $803 Clean Energy Businesses (c) Renewables $— $— $— $68 $— $68 Energy services — — — 7 — 7 Develop/Transfer Projects — — — 7 — 7 Other — — — — 47 47 Total Clean Energy Businesses $— $— $— $82 $47 $129 Con Edison Transmission 3 — 3 3 — 3 Other (b) — (1) (1) — (3) (3) Total Con Edison $11,777 $(190) $11,587 $10,850 $369 $11,219 (a) For the Utilities, this includes primarily revenue or negative revenue adjustments from alternative revenue programs, such as the revenue decoupling mechanisms under their New York electric and gas rate plans. For the Clean Energy Businesses, this included revenue from wholesale services. On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R and Note S. (b) Other includes the parent company, Con Edison's tax equity investments, the deferred project held for sale and consolidation adjustments. See Note S. (c) On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R and Note S. Use of the Percentage-of-Completion Method Sales and profits on each percentage-of-completion contract at the Clean Energy Businesses were recorded each month based on the ratio of actual cumulative costs incurred to the total estimated costs at completion of the contract, multiplied by the total estimated contract revenue, less cumulative revenues recognized in prior periods (the ‘‘cost-to-cost’’ method). The impact of revisions of contract estimates, which may have resulted from contract modifications, performance or other reasons, were recognized on a cumulative catch-up basis in the period in which the revisions were mad e . On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R. 2024 2023 (Millions of Dollars) Unbilled contract revenue (a) Unearned revenue (b) Unbilled contract revenue (a) Unearned revenue (b) Beginning balance as of January 1, $4 $— $80 $3 Additions (c) — — 2 — Subtractions (c) — — 78 3 (d) Ending balance as of September 30, $4 $— $4 (e) $— (a) Unbilled contract revenue represents accumulated incurred costs and earned profits on contracts (revenue arrangements), which have been recorded as revenue, but have not yet been billed to customers, and which represent contract assets as defined in Topic 606. Substantially all accrued unbilled contract revenue is expected to be collected within one year. Unbilled contract revenue arises from the cost-to-cost method of revenue recognition. Unbilled contract revenue from fixed-price type contracts is converted to billed receivables when amounts are invoiced to customers according to contractual billing terms, which generally occur when deliveries or other performance milestones are completed. (b) Unearned revenue represents a liability for billings to customers in excess of earned revenue, which are contract liabilities as defined in Topic 606. (c) Additions for unbilled contract revenue and subtractions for unearned revenue represent additional revenue earned. Additions for unearned revenue and subtractions for unbilled contract revenue represent billings. Activity also includes appropriate balance sheet classification for the period. Of the subtractions in 2023, $21 million and $1 million relate to the sale of all of the stock of the Clean Energy Businesses for unbilled contract revenue and unearned revenue, respectively. See (e) below. (d) Of the subtractions from unearned revenue, $3 million was included in the balances as of January 1, 2023. (e) Following the sale of all of the stock of the Clean Energy Businesses, Con Edison received substantially all contract revenue, net of certain costs incurred, for a battery storage project located in Imperial County, California. See Note R.

Current Expected Credit Losses

Current Expected Credit Losses	9 Months Ended
	Sep. 30, 2024
Credit Loss [Abstract]
Current Expected Credit Losses	Current Expected Credit Losses Allowance for Uncollectible Accounts The Utilities’ “Account receivable – customers” balance consists of utility bills due (bills are generally due the month following billing) from customers who have energy delivered, generated, or services provided by the Utilities. The balance also reflects the Utilities’ purchase of receivables from energy service companies to support the retail choice programs. The “Other receivables” balance generally reflects costs billed by the Utilities for goods and services provided to external parties, such as accommodation work for private parties and certain governmental entities, real estate rental and pole attachments. The Companies develop expected loss estimates using past events data and consider current conditions and future reasonable and supportable forecasts. Changes to the Utilities’ reserve balances that result in write-offs of customer accounts receivable balances above existing rate allowances are not reflected in rates during the term of the current rate plans. For the Utilities’ customer accounts receivable allowance for uncollectible accounts, past events considered include write-offs relative to customer accounts receivable; current conditions include macro-and micro-economic conditions related to trends in the local economy, bankruptcy rates and aged customer accounts receivable balances, among other factors; and forecasts about the future include assumptions related to the level of write-offs and recoveries. Generally, the Utilities write off customer accounts receivable as uncollectible 90 days after the account is disconnected for non-payment, or the account is closed during the collection process. Other receivables allowance for uncollectible accounts is calculated based on a historical average of collections relative to total other receivables, including current receivables. Current macro- and micro-economic conditions are also considered when calculating the current reserve. Probable outcomes of pending litigation, whether favorable or unfavorable to the Companies, are also included in the consideration. Starting in 2020, the economic impact of the COVID-19 pandemic was also considered in forward-looking projections rela ted to write-off and recovery rates and resulted in increases to the allowance for uncollectible accounts. The increases to the allowance for customer uncollectible accounts for Con Edison and CECONY were $27 million and $29 million, respectively, for the three months ended September 30, 2024 and $101 million and $95 million, respectively, for the nine month s ended September 30, 2024. The increases (decreases) to the allowance for customer uncollectible accounts for Con Edison and CECONY were $1 million and $3 million , respectively, for the three months ended September 30, 2023 and were $(46) million and $(45) million , respectively, for the nine months ended September 30, 2023 primarily resulting from credits issued pursuant to New York State COVID-19 arrears assistance programs. Customer accounts receivable and the associated allowance for uncollectible accounts are included in the line “Accounts receivable – customers” on the Companies’ consolidated balance sheets. Other receivables and the associated allowance for uncollectible accounts are included in “Other receivables” on the consolidated balance sheets. The table below presents a rollforward by major portfolio segment type for the three and nine months ended September 30, 2024 and 2023: For the Three Months Ended September 30, Con Edison CECONY Accounts receivable - customers Other receivables Accounts receivable - customers Other receivables (Millions of Dollars) 2024 2023 2024 2023 2024 2023 2024 2023 Allowance for credit losses Beginning Balance at July 1, $434 $275 $25 $28 $419 $266 $21 $24 Recoveries — 3 — — — 3 — — Write-offs (65) (43) — (4) (63) (41) — (3) Reserve adjustments 92 41 (1) 7 92 41 — 6 Ending Balance September 30, $461 $276 $24 $31 $448 $269 $21 $27 For the Nine Months Ended September 30, 2024 Con Edison CECONY Accounts receivable - customers Other receivables Accounts receivable - customers Other receivables (Millions of Dollars) 2024 2023 2024 2023 2024 2023 2024 2023 Allowance for credit losses Beginning Balance at January 1, $360 $322 $13 $10 $353 $314 $9 $7 Recoveries 17 11 — — 13 10 — — Write-offs (160) (135) — (5) (152) (130) — (3) Reserve adjustments 244 78 11 26 234 75 12 23 Ending Balance September 30, $461 $276 $24 $31 $448 $269 $21 $27

Financial Information by Busine

Financial Information by Business Segment	9 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Financial Information by Business Segment	Financial Information by Business Segment Con Edison’s principal business segments are CECONY’s regulated utility activities, O&R’s regulated utility activities and Con Edison Transmission. CECONY’s principal business segments are its regulated electric, gas and steam utility activities. The financial data for the business segments for the three and nine months ended September 30, 2024 and 2023 were as follows: For the Three Months Ended September 30, Operating Inter-segment Depreciation and Operating (Millions of Dollars) 2024 2023 2024 2023 2024 2023 2024 2023 CECONY Electric $3,376 $3,223 $5 $4 $376 $352 $998 $867 Gas 337 318 2 2 117 108 (112) (108) Steam 49 49 19 19 27 25 (83) (80) Consolidation adjustments — — (26) (25) — — — — Total CECONY $3,762 $3,590 $— $— $520 $485 $803 $679 O&R Electric 293 246 — — 21 19 72 59 Gas 36 35 — — 9 7 (9) (11) Total O&R $329 $281 $— $— $30 $26 $63 $48 Con Edison Transmission 1 1 — — — 1 (1) (2) Other (a) — — — — — — (3) (3) Total Con Edison $4,092 $3,872 $— $— $550 $512 $862 $722 (a) Other includes the parent company, Con Edison’s tax equity investments, the deferred project held for sale and consolidation adjustments. See Note S. For the Nine Months Ended September 30, Operating Inter-segment Depreciation and Operating (Millions of Dollars) 2024 2023 2024 2023 2024 2023 2024 2023 CECONY Electric $8,188 $7,722 $15 $14 $1,090 $1,035 $1,511 $1,292 Gas 2,119 2,140 7 6 343 319 588 533 Steam 423 425 56 55 79 74 8 (75) Consolidation adjustments — — (78) (75) — — — — Total CECONY $10,730 $10,287 $— $— $1,512 $1,428 $2,107 $1,750 O&R Electric 662 588 — — 61 56 97 73 Gas 193 215 — — 26 22 30 27 Total O&R $855 $803 $— $— $87 $78 $127 $100 Clean Energy Businesses (a) — 129 — — — — — 37 Con Edison Transmission 3 3 — — 1 1 (6) (6) Other (b) (1) (3) — — 1 (1) (35) 864 Total Con Edison $11,587 $11,219 $— $— $1,601 $1,506 $2,193 $2,745 (a) On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. As a result of this sale, the Clean Energy Businesses are no longer a principal segment. See Note R and Note S. (b) Other includes the parent company, Con Edison’s tax equity investments, the deferred project held for sale and consolidation adjustments. See Note S.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	9 Months Ended
	Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities Con Edison’s subsidiaries hedge market price fluctuations associated with physical purchases and sales of electricity, natural gas, steam and, to a lesser extent, refined fuels by using derivative instruments including futures, forwards, basis swaps, options, transmission congestion contracts and financial transmission rights contracts. These are economic hedges, for which the Utilities do not elect hedge accounting. The Companies use economic hedges to manage commodity price risk in accordance with provisions set by state regulators. The volume of hedging activity at the Utilities depends upon the forecasted volume of physical commodity supply to meet customer needs, and program costs or benefits are recovered from or credited to full-service customers, respectively. Derivatives are recognized on the consolidated balance sheet at fair value (see Note O), unless an exception is available under the accounting rules for derivatives and hedging. Qualifying derivative contracts that have been designated as normal purchases or normal sales contracts are not reported at fair value under the accounting rules . The fair values of the Companies’ derivatives including the offsetting of assets and liabilities on the consolidated balance sheet at September 30, 2024 and December 31, 2023 were: (Millions of Dollars) 2024 2023 Balance Sheet Location Gross Amounts of Recognized Assets (Liabilities) Gross Net Amounts of Assets (Liabilities) (a) Gross Amounts of Recognized Assets (Liabilities) Gross Net Amounts of Assets (Liabilities) (a) Con Edison Fair value of derivative assets Current $64 $(53) $11 (b) $83 $(38) $45 (b) Noncurrent 44 (23) 21 77 (29) 48 Total fair value of derivative assets $108 $(76) $32 $160 $(67) $93 Fair value of derivative liabilities Current $(159) $57 $(102) (b) $(230) $52 $(178) (b) Noncurrent (147) 27 (120) (154) 33 (121) Total fair value of derivative liabilities $(306) $84 $(222) $(384) $85 $(299) Net fair value derivative assets (liabilities) $(198) $8 $(190) $(224) $18 $(206) CECONY Fair value of derivative assets Current $60 $(50) $10 (b) $78 $(35) $43 (b) Noncurrent 42 (22) 20 76 (27) 49 Total fair value of derivative assets $102 $(72) $30 $154 $(62) $92 Fair value of derivative liabilities Current $(147) $54 $(93) (b) $(217) $48 $(169) (b) Noncurrent (131) 25 (106) (139) 31 (108) Total fair value of derivative liabilities $(278) $79 $(199) $(356) $79 $(277) Net fair value derivative assets (liabilities) $(176) $7 $(169) $(202) $17 $(185) (a) Derivative instruments and collateral were offset on the consolidated balance sheet as applicable under the accounting rules. The Companies enter into master agreements for their commodity derivatives. These agreements typically provide offset in the event of contract termination. In such case, generally the non-defaulting party’s payable will be offset by the defaulting party’s payable. The non-defaulting party will customarily notify the defaulting party within a specific time period and come to an agreement on the early termination amount. (b) At September 30, 2024, margin deposits for Con Edison ($4 million and $(7) million) were classified as derivative assets and derivative liabilities, respectively, and for CECONY ($3 million and $(2) million) were classified as derivative assets and derivative liabilities, respectively, on the consolidated balance sheets, but not included in the table. At December 31, 2023 margin deposits for Con Edison ($7 million and $(15) million) were classified as derivative assets and derivative liabilities, respectively, and for CECONY ($6 million and $(10) million) were classified as derivative assets and derivative liabilities, respectively, on the consolidated balance sheets, but not included in the table. Margin is collateral, typically cash, that the holder of a derivative instrument is required to deposit in order to transact on an exchange and to cover its potential losses with its broker or the exchange. The Utilities generally recover their prudently incurred fuel, purchased power and gas costs, including hedging gains and losses, in accordance with rate provisions approved by the applicable state utility regulators. In accordance with the accounting rules for regulated operations, the Utilities record a regulatory asset or regulatory liability to defer recognition of unrealized gains and losses on their electric and gas derivatives. As gains and losses are realized in future periods, they will be recognized as purchased power, gas and fuel costs in the Companies’ consolidated income statements. The following table presents the realized and unrealized gains or losses on derivatives that have been deferred or recognized in earnings for the three and nine months ended September 30, 2024 and 2023: For the Three Months Ended September 30, Con Edison CECONY (Millions of Dollars) Financial Statement Location 2024 2023 2024 2023 Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: Current Regulatory liabilities $(31) $(11) $(27) $(9) Noncurrent Regulatory liabilities (7) (11) (5) (9) Total deferred gains (losses) $(38) $(22) $(32) $(18) Current Regulatory assets $(18) $22 $(15) $20 Current Recoverable energy costs (81) (98) (75) (94) Noncurrent Regulatory assets (39) (34) (34) (29) Total deferred gains (losses) $(138) $(110) $(124) $(103) Net deferred gains (losses) $(176) $(132) $(156) $(121) Pre-tax gains (losses) recognized in income Other operations and maintenance expense $(1) $1 $(1) $1 Total pre-tax gains (losses) recognized in income $(1) $1 $(1) $1 For the Nine Months Ended September 30, Con Edison CECONY (Millions of Dollars) Financial Statement Location 2024 2023 2024 2023 Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: Current Regulatory liabilities $(45) $(221) $(42) $(203) Noncurrent Regulatory liabilities (30) (128) (30) (113) Total deferred gains (losses) $(75) $(349) $(72) $(316) Current Regulatory assets $104 $47 $102 $45 Current Recoverable energy costs (269) (474) (247) (449) Noncurrent Regulatory assets 9 (68) 9 (63) Total deferred gains (losses) $(156) $(495) $(136) $(467) Net deferred gains (losses) (a) $(231) $(844) $(208) $(783) Pre-tax gains (losses) recognized in income Gas purchased for resale (b) $— $4 $— $— Non-utility revenue (b) — 17 — — Other operations and maintenance expense — 1 — 1 Other interest expense (b) — 5 — — Total pre-tax gains (losses) recognized in income $— $27 $— $1 (a) Unrealized net deferred losses on electric and gas derivatives for the Utilities decreased as a result of higher electric and gas commodity prices during the nine months ended September 30, 2024. Upon settlement, short-term deferred derivative losses generally increase the recoverable costs of electric and gas purchases. (b) Comprised of realized and unrealized gains and losses on the derivative contracts of the Clean Energy Businesses. On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R. The following table presents the hedged volume of Con Edison’s and CECONY’s commodity derivative transactions at September 30, 2024: Electric Energy Capacity (MW-mos) (a) Natural Gas Refined Fuels Con Edison 36,052,760 36,600 337,880,000 2,520,000 CECONY 32,953,250 28,200 316,190,000 2,520,000 (a) Volumes are reported net of long and short positions, except natural gas collars where the volumes of long positions are reported. (b) Excludes electric congestion and gas basis swap contracts which are associated with electric and gas contracts and hedged volumes. The Companies are exposed to credit risk related to transactions entered into primarily for the various energy supply and hedging activities by the Utilities. Credit risk relates to the loss that may result from a counterparty’s nonperformance. The Companies use credit policies to manage this risk, including an established credit approval process, monitoring of counterparty limits, netting provisions within agreements, collateral or prepayment arrangements, credit insurance and credit default swaps. The Companies measure credit risk exposure as the replacement cost for open energy commodity and derivative positions plus amounts owed from counterparties for settled transactions. The replacement cost of open positions represents unrealized gains, net of any unrealized losses where the Companies have a legally enforceable right to offset. At September 30, 2024, Con Edison and CECONY h ad $6 million and $5 million, respectively, of credit exposure in connection with open energy supply net receivables and hedging activities, net of collateral. Con Edison’s net credit exposure consisted of $2 million with investment-grade counterparties and $4 million with commodity exchange brokers. CECONY’s net credit exposure consisted of $2 million with investment-grade counterparties and $3 million with commodity exchange brokers. On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R and Note S. The collateral requirements associated with, and settlement of, derivative transactions are included in net cash flows from operating activities in the Companies’ consolidated statements of cash flows. Most derivative instrument contracts contain provisions that may require a party to provide collateral on its derivative instruments that are in a net liability position. The amount of collateral to be provided will depend on the fair value of the derivative instruments and the party’s credit ratings. The following table presents the aggregate fair value of the Companies’ derivative instruments with credit-risk-related contingent features that are in a net liability position, the collateral posted for such positions and the additional collateral that would have been required to be posted had the lowest applicable credit rating been reduced one level and to below investment grade at September 30, 2024: (Millions of Dollars) Con Edison (a) CECONY (a) Aggregate fair value – net liabilities $215 $193 Collateral posted 181 175 Additional collateral (b) (downgrade one level from current ratings) 12 3 Additional collateral (b)(c) (downgrade to below investment grade from current ratings) 166 136 (a) Non-derivative transactions for the purchase and sale of electricity and gas and qualifying derivative instruments, that have been designated as normal purchases or normal sales, are excluded from the table. These transactions primarily include purchases of electricity from independent system operators. In the event the Utilities are no longer extended unsecured credit for such purchases, the Companies would be required to post $1 million of additional collateral at September 30, 2024. For certain other such non-derivative transactions, the Companies could be required to post collateral under certain circumstances, including in the event counterparties had reasonable grounds for insecurity. (b) The Companies measure the collateral requirements by taking into consideration the fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position plus amounts owed to counterparties for settled transactions and amounts required by counterparties for minimum financial security. The fair value amounts represent unrealized losses, net of any unrealized gains where the Companies have a legally enforceable right to offset. (c) Derivative instruments that are net assets have been excluded from the table. At September 30, 2024, if Con Edison had been downgraded to below investment grade, it would have been required to post additional collateral for such derivative instruments of $7 million.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The accounting rules for fair value measurements and disclosures define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date in a principal or most advantageous market. Fair value is a market-based measurement that is determined based on inputs, that refer broadly to assumptions that market participants use in pricing assets or liabilities. These inputs can be readily observable, market corroborated, or generally unobservable firm inputs. The Companies often make certain assumptions that market participants would use in pricing the asset or liability, including assumptions about risk, and the risks inherent in the inputs to valuation techniques. The Companies use valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. The accounting rules for fair value measurements and disclosures established a fair value hierarchy, that prioritizes the inputs to valuation techniques used to measure fair value in three broad levels. The rules require that assets and liabilities be classified in their entirety based on the level of input that is significant to the fair value measurement. Assessing the significance of a particular input may require judgment considering factors specific to the asset or liability and may affect the valuation of the asset or liability and their placement within the fair value hierarchy. The Companies classify fair value balances based on the fair value hierarchy defined by the accounting rules for fair value measurements and disclosures as follows: • Level 1 – Consists of assets or liabilities whose value is based on unadjusted quoted prices in active markets at the measurement date. An active market is one in which transactions for assets or liabilities occur with sufficient frequency and volume to provide pricing information on an ongoing basis. This category includes contracts traded on active exchange markets valued using unadjusted prices quoted directly from the exchange. • Level 2 – Consists of assets or liabilities valued using industry standard models and based on prices, other than quoted prices within Level 1, that are either directly or indirectly observable as of the measurement date. The industry standard models consider observable assumptions including time value, volatility factors and current market and contractual prices for the underlying commodities, in addition to other economic measures. This category includes contracts traded on active exchanges or in over-the-counter markets priced with industry standard models. • Level 3 – Consists of assets or liabilities whose fair value is estimated based on internally developed models or methodologies using inputs that are generally less readily observable and supported by little, if any, market activity at the measurement date. Unobservable inputs are developed based on the best available information and subject to cost benefit constraints. This category includes contracts priced using models that are internally developed and contracts placed in illiquid markets. It also includes contracts that expire after the period of time for which quoted prices are available and internal models are used to determine a significant portion of the value. For information on the measurement of Con Edison's investment in MVP that was measured at fair value on a non-recurring basis, see Note A. Assets and liabilities measured at fair value on a recurring basis as of September 30, 2024 and December 31, 2023 are summarized below. 2024 2023 (Millions of Dollars) Level 1 Level 2 Level 3 Netting Total Level 1 Level 2 Level 3 Netting Total Con Edison Derivative assets: Commodity (a)(b)(c) $3 $92 $1 $(60) $36 $6 $146 $2 $(54) $100 Mutual Funds (a)(b) 574 — — — 574 505 — — — 505 Cash Value of Life Insurance Policies (a)(b) — 133 — — 133 — 118 — — 118 Total assets $577 $225 $1 $(60) $743 $511 $264 $2 $(54) $723 Derivative liabilities: Commodity (a)(b)(c) $8 $260 $26 $(65) 229 $22 $347 $10 $(65) $314 CECONY Derivative assets: Commodity (a)(b)(c) $3 $89 $1 $(60) $33 $6 $143 $1 $(52) $98 Mutual Funds (a)(b) 557 — — — 557 488 — — — 488 Cash Value of Life Insurance Policies (a)(b) — 127 — — 127 — 113 — — 113 Total assets $560 $216 $1 $(60) $717 $494 $256 $1 $(52) $699 Derivative liabilities: Commodity (a)(b)(c) $6 $244 $18 $(67) 201 $20 $326 $6 $(65) $287 (a) The Companies’ policy is to review the fair value hierarchy and recognize transfers into and transfers out of the levels at the end of each reporting period . Con Edison and CECON Y had $5 million of commodity derivative assets and an immaterial amount of liabilities transferred from level 3 to level 2 during the nine months ended September 30, 2024 because of availability of observable market data due to the decrease in the terms of certain contracts from beyond three years as of December 31, 2023 to less than three years as of September 30, 2024. Con Edison and CECONY had an immaterial amount of derivative assets and $9 million and $6 million of commodity derivative liabilities, respectively, transferred from level 3 to level 2 during the year ended December 31, 2023 because of availability of observable market data due to the decrease in the terms of certain contracts from beyond three years as of September 30, 2023 to less than three years as of December 31, 2023. (b) Level 2 assets and liabilities include investments held in the deferred compensation plan and/or non-qualified retirement plans, exchange-traded contracts where there is insufficient market liquidity to warrant inclusion in Level 1, and certain over-the-counter derivative instruments for electricity, refined products and natural gas. Derivative instruments classified as Level 2 are valued using industry standard models that incorporate corroborated observable inputs, such as pricing services or prices from similar instruments that trade in liquid markets, time value and volatility factors. (c) The accounting rules for fair value measurements and disclosures require consideration of the impact of nonperformance risk (including credit risk) from a market participant perspective in the measurement of the fair value of assets and liabilities. At September 30, 2024 and December 31, 2023, the Companies determined that nonperformance risk would have no material impact on their financial position or results of operations. (d) Amounts represent the impact of legally-enforceable master netting agreements that allow the Companies to net gain and loss positions and cash collateral held or placed with the same counterparties. The employees in the Companies’ risk management group develop and maintain the Companies’ valuation policies and procedures for, and verify pricing and fair value valuation of, commodity derivatives. Under the Companies’ policies and procedures, multiple independent sources of information are obtained for forward price curves used to value commodity derivatives. Fair value and changes in fair value of commodity derivatives are reported monthly to the Companies’ risk committees, comprised of officers and employees of the Companies that oversee energy hedging at the Utilities. The risk management group reports to the Companies’ Vice President and Treasurer. Fair Value of Level 3 at September 30, 2024 Valuation Unobservable Inputs Range Average (Millions of Dollars) Con Edison – Commodity Electricity $(12) Discounted Cash Flow Forward energy prices ($/MWh) (a) $33.80-$109.05 $58.66 Electricity (14) Discounted Cash Flow Forward capacity prices ($/kW-month) (a) $0.96-$7.53 $3.92 Transmission Congestion Contracts 1 Discounted Cash Flow Inter-zonal forward price curves adjusted for historical zonal losses ($/MWh) (b) $0.18-$3.35 $1.10 Total Con Edison—Commodity $(25) CECONY – Commodity Electricity $(12) Discounted Cash Flow Forward energy prices ($/MWh) (a) $35.70-$109.05 $59.06 Electricity (6) Discounted Cash Flow Forward capacity prices ($/kW-month) (a) $0.96-$7.53 $3.96 Transmission Congestion Contracts 1 Discounted Cash Flow Inter-zonal forward price curves adjusted for historical zonal losses ($/MWh) (b) $0.18-$3.35 $1.10 Total CECONY—Commodity $(17) (a) Generally, increases (decreases) in this input in isolation would result in a higher (lower) fair value measurement. (b) Generally, increases (decreases) in this input in isolation would result in a lower (higher) fair value measurement. The table listed below provides a reconciliation of the beginning and ending net balances for assets and liabilities measured at fair value as of September 30, 2024 and 2023 and classified as Level 3 in the fair value hierarchy: For the Three Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Beginning balance as of July 1, $(11) $(7) $(6) $(4) Included in earnings (1) 2 — 1 Included in regulatory assets and liabilities (15) (3) (12) (3) Settlements 2 (2) 1 (1) Ending balance as of September 30, $(25) $(10) $(17) $(7) For the Nine Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Beginning balance as of January 1, $(8) $15 $(5) $(6) Included in earnings (6) (2) (2) (1) Included in regulatory assets and liabilities (13) 16 (8) 10 Settlements 7 — 3 — Decrease due to the sale of the Clean Energy Businesses (a) — (29) — — Transfer out of level 3 (5) (10) (5) (10) Ending balance as of September 30, $(25) $(10) $(17) $(7) (a) On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R and Note S. For the Utilities, realized gains and losses on Level 3 commodity derivative assets and liabilities are reported as part of purchased power, gas and fuel costs. The Utilities generally recover these costs in accordance with rate provisions approved by the applicable state public utilities regulators. See Note A. Unrealized gains and losses for commodity derivatives are generally deferred on the consolidated balance sheet in accordance with the accounting rules for regulated operations. For the Clean Energy Businesses, realized and unrealized gains and losses on Level 3 commodity derivative assets and liabilities were repor ted in non-utility revenues ($17 million loss) on the consolidated income statement for the nine months ended September 30, 2023. On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses and amounts for 2023 are shown through the date of sale. See Note R and Note S.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2024
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The NYSPSC generally requires that the Utilities and Con Edison’s other subsidiaries be operated as separate entities. The Utilities and the other subsidiaries are required to have separate operating employees and operating officers of the Utilities may not be operating officers of the other subsidiaries. The Utilities may provide administrative and other services to, and receive such services from, Con Edison and its other subsidiaries only pursuant to cost allocation procedures approved by the NYSPSC. Transfers of assets between the Utilities and Con Edison or its other subsidiaries may be made only as approved by the NYSPSC. The debt of the Utilities is to be raised directly by the Utilities and not derived from Con Edison. Without the prior permission of the NYSPSC, the Utilities may not make loans to, guarantee the obligations of, or pledge assets as security for the indebtedness of Con Edison or its other subsidiaries. The NYSPSC limits the dividends that the Utilities may pay Con Edison. As a result, substantially all of the net assets of CECONY and O&R ($19,873 million and $1,134 million, respectively), at September 30, 2024, are considered restricted net assets. The NYSPSC may impose additional measures to separate, or “ring fence,” the Utilities from Con Edison and its other subsidiaries. The costs of administrative and other services provided by CECONY to, and received by it from, Con Edison and its other subsidiaries for the three and nine months ended September 30, 2024 and 2023 were as follows: For the Three Months Ended September 30, CECONY (a) (Millions of Dollars) 2024 2023 Cost of services provided $39 $39 Cost of services received $21 $21 For the Nine Months Ended September 30, CECONY (a) (Millions of Dollars) 2024 2023 Cost of services provided $106 $105 Cost of services received $62 $61 (a) On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R and Note S. In addition, CECONY and O&R have joint gas supply arrangements in connection with which CECONY sold to O&R, $14 million of natural gas for the three months ended September 30, 2024 and 2023 and $52 million and $60 million for the nine months ended September 30, 2024 and 2023, respectively. These amounts are net of the effect of related hedging transactions. At September 30, 2024 and December 31, 2023, CECONY's net receivable from Con Edison for income taxes were $452 million and $110 million, respectively. The Utilities perform work and incur expenses on behalf of New York Transco, a company in which Con Edison Transmission has a 45.7 percent interest in New York Transco's New York Energy Solution project and a 41.7 percent interest in New York Transco's share of the Propel NY Energy project that is jointly owned with New York Power Authority (NYPA). The Utilities bill New York Transco for such work and expenses in accordance with established policies. For the three and nine months ended September 30, 2024 and 2023, the amounts billed by the Utilities to New York Transco were immaterial. CECONY has a 20-year transportation contract with MVP for 200,000 Dts per day of capacity. Con Edison Transmission's interest in MVP is expected to be approximately 6.6 percent. See "Investment in Mountain Valley Pipeline, LLC (MVP)" in Note A. In October 2017, the Environmental Defense Fund and the Natural Resource Defense Council requested the NYSPSC to prohibit CECONY from recovering costs under its contract with MVP unless CECONY can demonstrate that the contract is in the public interest. CECONY advised the NYSPSC that it would respond to the request if the NYSPSC were to open a proceeding to consider this request. For the three and nine months ended September 30, 2024, the amounts billed by MVP to CECONY were $12 million. FERC has authorized CECONY to lend funds to O&R for a period of not more than 12 months, in an amount not to exceed $250 million, at prevailing market rates. At September 30, 2024 and December 31, 2023 there were no outstanding loans to O&R. The Consolidated Edison Foundation, Inc. (the Foundation), established in December 2023, is a non-consolidated not-for-profit corporation funded by Con Ediso n that plans to make contributions t

New Financial Accounting Standa

New Financial Accounting Standards	9 Months Ended
	Sep. 30, 2024
Accounting Changes and Error Corrections [Abstract]
New Financial Accounting Standards	New Financial Accounting Standards In November 2023, the Financial Accounting Standards Board (FASB) issued amendments to the disclosure requirements for a public entity’s reportable segments through ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures." The amendments improve the disclosures about a public entity’s reportable segments and address requests from investors for additional, more detailed information about a reportable segment’s expenses. The amendments are effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. A public entity should apply these amendments retrospectively to all prior periods presented in the financial statements. The Companies do not expect the new guidance to have a material impact on their financial position, results of operations and liquidity. In December 2023, the FASB issued amendments to the guidance on accounting for Income Taxes (Topic 740) through ASU 2023-09 to improve disclosures related to income taxes. The amendments focus on three key areas: rate reconciliation, income taxes paid, and income (or loss)/income tax expense (or benefit) from disaggregated continuing operations. For public entities, the amendments are effective for annual reporting periods beginning after December 15, 2024. Early adoption is permitted for annual financial statements. The Companies do not expect the new guidance to have a material impact on their financial position, results of operations and liquidity. In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40) to improve disclosures about a public business entity's expenses. The ASU addresses requests from investors for more detailed information about the types of expenses (including purchases of inventory, employee compensation, depreciation, amortization, and depletion) in commonly presented expense captions. The amendments require a public business entity to disclose, in the notes to the financial statements, specified information about certain costs and expenses at each interim and annual reporting period. The amendments are effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. Early adoption is permitted. The Companies are in the process of evaluating the potential impact of the ASU on their financial position, results of operations and liquidity.

Dispositions

Dispositions	9 Months Ended
	Sep. 30, 2024
Discontinued Operations and Disposal Groups [Abstract]
Dispositions	Dispositions During the first nine months of 2022, Con Edison considered strategic alternatives with respect to the Clean Energy Businesses. On October 1, 2022, following the conclusion of such review and to allow for continued focus on the Utilities and their clean energy transition, Con Edison entered into a purchase and sale agreement pursuant to which Con Edison agreed to sell all of the stock of the Clean Energy Businesses to RWE Renewables Americas, LLC, a subsidiary of RWE for a total of $6,800 million, subject to closing adjustments. On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses to RWE for $3,993 million. The preliminary purchase price at closing was adjusted (i) upward for certain cash and cash equivalents, (ii) downward for certain indebtedness and debt-like items, (iii) downward for certain transaction expenses, (iv) downward to the extent that the net working capital varied from a set target, (v) upward to the extent that capital investments incurred prior to the closing of the transaction varied from a set budget, and (vi) downward by the value allocated to Broken Bow II, a project that was not able to be conveyed to RWE upon closing of the transaction. The process to finalize the purchase price was completed during the second quarter of 2024. The final purchase price was subject to customary adjustments for timing differences and a final valuation report, among other factors. The transaction was completed at arm’s length and RWE was not, and will not be, considered a related party to Con Edison. Con Edison's preliminary gain on the sale of all of the stock of the Clean Energy Businesses was $866 million ($784 million, after tax) for the nine months ended September 30, 2023, including an immaterial amount for the three months ended September 30, 2023. Con Edison's preliminary gain on the sale of all of the stock of the Clean Energy Businesses was $865 million ($767 million, after tax) for the year ended December 31, 2023. Cumulatively through September 30, 2024 the gain on the sale of all of the stock of the Clean Energy Businesses was $835 million ($745 million, after tax), reflecting a downward adjustment of $30 million ($22 million after-tax) for the nine month period, resulting from certain customary closing adjustments. The portion of the gain attributable to the non-controlling interest retained in certain tax-equity projects was not material. The sale included all assets, operations and projects of the Clean Energy Businesses with the exception of tax equity interests in three projects, described below, and one deferred project, Broken Bow II, a 75MW nameplate capacity wind power project located in Nebraska. See Note S. Transfer of the project depends on one outstanding counterparty consent, and if and when such consent is obtained within two years of the sale of all of the stock of the Clean Energy Businesses, i.e., by February 28, 2025, the project will transfer and the corresponding value, subject to adjustment, will be paid to Con Edison. RWE Renewables Americas, LLC operates the facility on behalf of Con Edison pursuant to certain service agreements, for which the fees are not material. Con Edison retained the Clean Energy Businesses' tax equity investment interest in the Crane solar project and another tax equity investment interest in two solar projects located in Virginia. These tax equity partnerships produced renewable energy tax credits that can be used to reduce Con Edison’s federal income tax. These tax credits are subject to recapture, in whole or in part, if the assets are sold within a five-year period beginning on the date on which the assets are placed in service. Con Edison will continue to employ HLBV accounting for its interest s in these tax equity partnerships. The combined carrying value of the retained tax equity interests is approximately $9 million a t September 30, 2024. Con Edison also retained any post-sale deferred income taxes (federal and state income taxes, including tax attributes), any valuation allowances associated with the deferred tax assets, all current federal taxes and New York State taxes and the estimated liability for uncertain tax positions. The unamortized deferred investment tax credits of the Clean Energy Businesses were recognized in full upon the completion of the sale of all of the stock of the Clean Energy Businesses. Concurrent with entering into the purchase and sale agreement, Con Edison incurred costs in the normal course of the sale process. Transaction costs of an immaterial amount and $11 million ($8 million after-tax), were recorded in the three and nine months ended September 30, 2023, respectively, and were immaterial for the three and nine months ended September 30, 2024. Also, depreciation and amortization expense of approximately $41 million ($28 million after-tax) were not recorded on the assets of the Clean Energy Businesses in 2023 through the closing of the transaction. Following the sale of all of the stock of the Clean Energy Businesses and pursuant to a reimbursement and indemnity agreement with RWE, Con Edison remains responsible for certain potential costs related to a battery storage project located in Imperial County, California. Con Edison's exposure under the agreement could range up to approximate ly $172 million . As of September 30, 2024, no material amounts were recorded as liabilities on Con Edison's consolidated balance sheet related to this agreement. The following table shows the pre-tax operating income for the Clean Energy Businesses. The 2023 period shown is through the date of the sale of the Clean Energy Businesses; there is no applicable data for the three and nine months ended September 30, 2024 . Nine Months Ended September 30, 2023 (Millions of Dollars) 2023 Pre-tax operating income $25 Pre-tax operating income, excluding non-controlling interest $21 Assets and Liabilities Held-for-Sale On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R. The sale included all assets, operations and projects of the Clean Energy Businesses with the exception of tax equity interests in three projects and one deferred project, Broken Bow II, a 75 MW nameplate capacity wind power project located in Nebraska. Transfer of the project from Con Edison to RWE depends on one outstanding counterparty consent, and if and when such consent is obtained within two years of the sale of all of the stock of the Clean Energy Businesses, i.e., by February 28, 2025, the project will transfer. RWE Renewables Americas, LLC operates the facility on behalf of Con Edison pursuant to certain service agreements for which the fees are not material. At September 30, 2024 , the carrying amounts of the major classes of assets and liabilities of Broken Bow II that are expected to be sold are presented on a held-for-sale basis, and accordingly exclude net deferred tax liability balances, as follows: (Millions of Dollars) September 30, ASSETS CURRENT ASSETS Cash and temporary cash investments $1 Accrued unbilled revenue 1 Restricted cash 8 Other current assets 2 TOTAL CURRENT ASSETS 12 NON-UTILITY PLANT Non-utility property, net accumulated depreciation 76 NET PLANT 76 OTHER NONCURRENT ASSETS Intangible assets less accumulated amortization 72 Operating lease right-of-use asset 7 TOTAL OTHER NONCURRENT ASSETS 79 TOTAL ASSETS $167 (Millions of Dollars) September 30, LIABILITIES CURRENT LIABILITIES Long-term debt due within one year $2 Operating lease liabilities 2 Other current liabilities 9 TOTAL CURRENT LIABILITIES 13 NONCURRENT LIABILITIES Asset retirement obligations 3 Operating lease liabilities 5 TOTAL NONCURRENT LIABILITIES 8 LONG-TERM DEBT 59 TOTAL LIABILITIES $80

Assets and Liabilities Held-for

Assets and Liabilities Held-for-Sale	9 Months Ended
	Sep. 30, 2024
Discontinued Operations and Disposal Groups [Abstract]
Assets and Liabilities Held-for-Sale	Dispositions During the first nine months of 2022, Con Edison considered strategic alternatives with respect to the Clean Energy Businesses. On October 1, 2022, following the conclusion of such review and to allow for continued focus on the Utilities and their clean energy transition, Con Edison entered into a purchase and sale agreement pursuant to which Con Edison agreed to sell all of the stock of the Clean Energy Businesses to RWE Renewables Americas, LLC, a subsidiary of RWE for a total of $6,800 million, subject to closing adjustments. On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses to RWE for $3,993 million. The preliminary purchase price at closing was adjusted (i) upward for certain cash and cash equivalents, (ii) downward for certain indebtedness and debt-like items, (iii) downward for certain transaction expenses, (iv) downward to the extent that the net working capital varied from a set target, (v) upward to the extent that capital investments incurred prior to the closing of the transaction varied from a set budget, and (vi) downward by the value allocated to Broken Bow II, a project that was not able to be conveyed to RWE upon closing of the transaction. The process to finalize the purchase price was completed during the second quarter of 2024. The final purchase price was subject to customary adjustments for timing differences and a final valuation report, among other factors. The transaction was completed at arm’s length and RWE was not, and will not be, considered a related party to Con Edison. Con Edison's preliminary gain on the sale of all of the stock of the Clean Energy Businesses was $866 million ($784 million, after tax) for the nine months ended September 30, 2023, including an immaterial amount for the three months ended September 30, 2023. Con Edison's preliminary gain on the sale of all of the stock of the Clean Energy Businesses was $865 million ($767 million, after tax) for the year ended December 31, 2023. Cumulatively through September 30, 2024 the gain on the sale of all of the stock of the Clean Energy Businesses was $835 million ($745 million, after tax), reflecting a downward adjustment of $30 million ($22 million after-tax) for the nine month period, resulting from certain customary closing adjustments. The portion of the gain attributable to the non-controlling interest retained in certain tax-equity projects was not material. The sale included all assets, operations and projects of the Clean Energy Businesses with the exception of tax equity interests in three projects, described below, and one deferred project, Broken Bow II, a 75MW nameplate capacity wind power project located in Nebraska. See Note S. Transfer of the project depends on one outstanding counterparty consent, and if and when such consent is obtained within two years of the sale of all of the stock of the Clean Energy Businesses, i.e., by February 28, 2025, the project will transfer and the corresponding value, subject to adjustment, will be paid to Con Edison. RWE Renewables Americas, LLC operates the facility on behalf of Con Edison pursuant to certain service agreements, for which the fees are not material. Con Edison retained the Clean Energy Businesses' tax equity investment interest in the Crane solar project and another tax equity investment interest in two solar projects located in Virginia. These tax equity partnerships produced renewable energy tax credits that can be used to reduce Con Edison’s federal income tax. These tax credits are subject to recapture, in whole or in part, if the assets are sold within a five-year period beginning on the date on which the assets are placed in service. Con Edison will continue to employ HLBV accounting for its interest s in these tax equity partnerships. The combined carrying value of the retained tax equity interests is approximately $9 million a t September 30, 2024. Con Edison also retained any post-sale deferred income taxes (federal and state income taxes, including tax attributes), any valuation allowances associated with the deferred tax assets, all current federal taxes and New York State taxes and the estimated liability for uncertain tax positions. The unamortized deferred investment tax credits of the Clean Energy Businesses were recognized in full upon the completion of the sale of all of the stock of the Clean Energy Businesses. Concurrent with entering into the purchase and sale agreement, Con Edison incurred costs in the normal course of the sale process. Transaction costs of an immaterial amount and $11 million ($8 million after-tax), were recorded in the three and nine months ended September 30, 2023, respectively, and were immaterial for the three and nine months ended September 30, 2024. Also, depreciation and amortization expense of approximately $41 million ($28 million after-tax) were not recorded on the assets of the Clean Energy Businesses in 2023 through the closing of the transaction. Following the sale of all of the stock of the Clean Energy Businesses and pursuant to a reimbursement and indemnity agreement with RWE, Con Edison remains responsible for certain potential costs related to a battery storage project located in Imperial County, California. Con Edison's exposure under the agreement could range up to approximate ly $172 million . As of September 30, 2024, no material amounts were recorded as liabilities on Con Edison's consolidated balance sheet related to this agreement. The following table shows the pre-tax operating income for the Clean Energy Businesses. The 2023 period shown is through the date of the sale of the Clean Energy Businesses; there is no applicable data for the three and nine months ended September 30, 2024 . Nine Months Ended September 30, 2023 (Millions of Dollars) 2023 Pre-tax operating income $25 Pre-tax operating income, excluding non-controlling interest $21 Assets and Liabilities Held-for-Sale On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R. The sale included all assets, operations and projects of the Clean Energy Businesses with the exception of tax equity interests in three projects and one deferred project, Broken Bow II, a 75 MW nameplate capacity wind power project located in Nebraska. Transfer of the project from Con Edison to RWE depends on one outstanding counterparty consent, and if and when such consent is obtained within two years of the sale of all of the stock of the Clean Energy Businesses, i.e., by February 28, 2025, the project will transfer. RWE Renewables Americas, LLC operates the facility on behalf of Con Edison pursuant to certain service agreements for which the fees are not material. At September 30, 2024 , the carrying amounts of the major classes of assets and liabilities of Broken Bow II that are expected to be sold are presented on a held-for-sale basis, and accordingly exclude net deferred tax liability balances, as follows: (Millions of Dollars) September 30, ASSETS CURRENT ASSETS Cash and temporary cash investments $1 Accrued unbilled revenue 1 Restricted cash 8 Other current assets 2 TOTAL CURRENT ASSETS 12 NON-UTILITY PLANT Non-utility property, net accumulated depreciation 76 NET PLANT 76 OTHER NONCURRENT ASSETS Intangible assets less accumulated amortization 72 Operating lease right-of-use asset 7 TOTAL OTHER NONCURRENT ASSETS 79 TOTAL ASSETS $167 (Millions of Dollars) September 30, LIABILITIES CURRENT LIABILITIES Long-term debt due within one year $2 Operating lease liabilities 2 Other current liabilities 9 TOTAL CURRENT LIABILITIES 13 NONCURRENT LIABILITIES Asset retirement obligations 3 Operating lease liabilities 5 TOTAL NONCURRENT LIABILITIES 8 LONG-TERM DEBT 59 TOTAL LIABILITIES $80

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
NET INCOME	$ 588	$ 526	$ 1,510	$ 2,185

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	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

Summary of Significant Accoun_2

Summary of Significant Accounting Policies and Other Matters (Policies)	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Reclassification	Reclassification Certain prior period amounts have been reclassified to conform with the current period presentation.
Earnings Per Share	Earnings Per Share Con Edison presents basic and diluted earnings per share (EPS) on the face of its consolidated income statement. Basic EPS is calculated by dividing earnings available to common shareholders (“Net income for common stock” on Con Edison’s consolidated income statement) by the weighted average number of Con Edison common shares outstanding during the period. In the calculation of diluted EPS, weighted average shares outstanding are increased for additional shares that would be outstanding if potentially dilutive securities were converted to common stock. Potentially dilutive securities for Con Edison consist of restricted stock units and deferred stock units for which the average market price of the common shares for the period was greater than the estimated vesting price.
Fair Value Measurements	Fair Value Measurements The accounting rules for fair value measurements and disclosures define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date in a principal or most advantageous market. Fair value is a market-based measurement that is determined based on inputs, that refer broadly to assumptions that market participants use in pricing assets or liabilities. These inputs can be readily observable, market corroborated, or generally unobservable firm inputs. The Companies often make certain assumptions that market participants would use in pricing the asset or liability, including assumptions about risk, and the risks inherent in the inputs to valuation techniques. The Companies use valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. The accounting rules for fair value measurements and disclosures established a fair value hierarchy, that prioritizes the inputs to valuation techniques used to measure fair value in three broad levels. The rules require that assets and liabilities be classified in their entirety based on the level of input that is significant to the fair value measurement. Assessing the significance of a particular input may require judgment considering factors specific to the asset or liability and may affect the valuation of the asset or liability and their placement within the fair value hierarchy. The Companies classify fair value balances based on the fair value hierarchy defined by the accounting rules for fair value measurements and disclosures as follows: • Level 1 – Consists of assets or liabilities whose value is based on unadjusted quoted prices in active markets at the measurement date. An active market is one in which transactions for assets or liabilities occur with sufficient frequency and volume to provide pricing information on an ongoing basis. This category includes contracts traded on active exchange markets valued using unadjusted prices quoted directly from the exchange. • Level 2 – Consists of assets or liabilities valued using industry standard models and based on prices, other than quoted prices within Level 1, that are either directly or indirectly observable as of the measurement date. The industry standard models consider observable assumptions including time value, volatility factors and current market and contractual prices for the underlying commodities, in addition to other economic measures. This category includes contracts traded on active exchanges or in over-the-counter markets priced with industry standard models. • Level 3 – Consists of assets or liabilities whose fair value is estimated based on internally developed models or methodologies using inputs that are generally less readily observable and supported by little, if any, market activity at the measurement date. Unobservable inputs are developed based on the best available information and subject to cost benefit constraints. This category includes contracts priced using models that are internally developed and contracts placed in illiquid markets. It also includes contracts that expire after the period of time for which quoted prices are available and internal models are used to determine a significant portion of the value.
New Financial Accounting Standards	New Financial Accounting Standards In November 2023, the Financial Accounting Standards Board (FASB) issued amendments to the disclosure requirements for a public entity’s reportable segments through ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures." The amendments improve the disclosures about a public entity’s reportable segments and address requests from investors for additional, more detailed information about a reportable segment’s expenses. The amendments are effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. A public entity should apply these amendments retrospectively to all prior periods presented in the financial statements. The Companies do not expect the new guidance to have a material impact on their financial position, results of operations and liquidity. In December 2023, the FASB issued amendments to the guidance on accounting for Income Taxes (Topic 740) through ASU 2023-09 to improve disclosures related to income taxes. The amendments focus on three key areas: rate reconciliation, income taxes paid, and income (or loss)/income tax expense (or benefit) from disaggregated continuing operations. For public entities, the amendments are effective for annual reporting periods beginning after December 15, 2024. Early adoption is permitted for annual financial statements. The Companies do not expect the new guidance to have a material impact on their financial position, results of operations and liquidity. In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40) to improve disclosures about a public business entity's expenses. The ASU addresses requests from investors for more detailed information about the types of expenses (including purchases of inventory, employee compensation, depreciation, amortization, and depletion) in commonly presented expense captions. The amendments require a public business entity to disclose, in the notes to the financial statements, specified information about certain costs and expenses at each interim and annual reporting period. The amendments are effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. Early adoption is permitted. The Companies are in the process of evaluating the potential impact of the ASU on their financial position, results of operations and liquidity.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies and Other Matters (Tables)	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Basic and Diluted Earnings Per Share	For the three and nine months ended September 30, 2024 and 2023, basic and diluted EPS for Con Edison are calculated as follows: For the Three Months Ended September 30, For the Nine Months Ended September 30, (Millions of Dollars, except per share amounts/Shares in Millions) 2024 2023 2024 2023 Net income for common stock $588 $526 $1,510 $2,185 Weighted average common shares outstanding – basic 346.2 345.0 345.9 348.4 Add: Incremental shares attributable to effect of potentially dilutive securities 1.3 1.5 1.3 1.5 Adjusted weighted average common shares outstanding – diluted 347.5 346.5 347.2 349.9 Net Income per common share – basic $1.70 $1.53 $4.37 $6.27 Net Income per common share – diluted $1.69 $1.52 $4.35 $6.24
Restrictions on Cash and Cash Equivalents	At September 30, 2024 and 2023, cash, temporary cash investments and restricted cash for Con Edison were as follows; CECONY did not have material restricted cash balances as of September 30, 2024 and 2023: At September 30, Con Edison (Millions of Dollars) 2024 2023 Cash and temporary cash investments $93 $539 Restricted cash (a) 9 6 Total cash, temporary cash investments and restricted cash $102 $545 (a)
Schedule of Cash and Cash Equivalents	At September 30, 2024 and 2023, cash, temporary cash investments and restricted cash for Con Edison were as follows; CECONY did not have material restricted cash balances as of September 30, 2024 and 2023: At September 30, Con Edison (Millions of Dollars) 2024 2023 Cash and temporary cash investments $93 $539 Restricted cash (a) 9 6 Total cash, temporary cash investments and restricted cash $102 $545 (a)

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2024
Regulated Operations [Abstract]
Schedule of Regulatory Assets	Regulatory assets and liabilities at September 30, 2024 and December 31, 2023 were comprised of the following items: Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Regulatory assets System peak reduction and energy efficiency programs $1,204 $1,095 $1,172 $1,075 Environmental remediation costs 1,093 1,105 1,010 1,022 COVID - 19 pandemic deferrals 888 789 875 782 Revenue taxes 525 476 503 455 Legacy meters (a) 420 17 405 — Property tax reconciliation 176 169 176 169 Deferred storm costs 169 206 67 115 Deferred derivative losses - long term 154 163 138 148 Electric vehicle make ready 115 73 105 68 MTA power reliability deferral 38 61 38 61 Gas service line deferred costs 23 43 23 43 Unrecognized pension and other postretirement costs (b) 10 — 10 — Pension and other postretirement benefits deferrals 5 48 5 39 Other 497 362 444 337 Regulatory assets – noncurrent 5,317 4,607 4,971 4,314 Deferred derivative losses - short term 165 269 151 253 Recoverable energy costs 59 12 42 1 Regulatory assets – current 224 281 193 254 Total Regulatory Assets $5,541 $4,888 $5,164 $4,568 Regulatory liabilities Allowance for cost of removal less salvage $1,470 $1,456 $1,269 $1,266 Future income tax* 1,324 1,535 1,209 1,404 Unrecognized pension and other postretirement costs (b) 787 943 739 867 Pension and other postretirement benefit deferrals 370 284 312 233 Net unbilled revenue deferrals 260 278 260 278 Late payment charge deferral 227 167 221 161 System benefit charge carrying charge 111 92 106 88 Net proceeds from sale of property 31 48 30 47 Deferred derivative gains - long term 19 49 19 49 Settlement of prudence proceeding 10 11 10 11 Other 428 465 386 414 Regulatory liabilities – noncurrent 5,037 5,328 4,561 4,818 Refundable energy costs 81 71 43 36 Revenue decoupling mechanism 33 — — — Deferred derivative gains - short term 29 74 28 71 Regulatory liabilities – current 143 145 71 107 Total Regulatory Liabilities $5,180 $5,473 $4,632 $4,925 * See "Other Regulatory Matters," above. (a) Pursuant to their rate plans, CECONY and O&R are recovering the costs of legacy meters over a 15-year period beginning January 1, 2024 and a 12-year period beginning January 1, 2022, respectively. (b) Unrecognized pension and other postretirement costs represent the deferrals associated with the accounting rules for retirement benefits.
Schedule of Regulatory Liabilities	Regulatory assets and liabilities at September 30, 2024 and December 31, 2023 were comprised of the following items: Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Regulatory assets System peak reduction and energy efficiency programs $1,204 $1,095 $1,172 $1,075 Environmental remediation costs 1,093 1,105 1,010 1,022 COVID - 19 pandemic deferrals 888 789 875 782 Revenue taxes 525 476 503 455 Legacy meters (a) 420 17 405 — Property tax reconciliation 176 169 176 169 Deferred storm costs 169 206 67 115 Deferred derivative losses - long term 154 163 138 148 Electric vehicle make ready 115 73 105 68 MTA power reliability deferral 38 61 38 61 Gas service line deferred costs 23 43 23 43 Unrecognized pension and other postretirement costs (b) 10 — 10 — Pension and other postretirement benefits deferrals 5 48 5 39 Other 497 362 444 337 Regulatory assets – noncurrent 5,317 4,607 4,971 4,314 Deferred derivative losses - short term 165 269 151 253 Recoverable energy costs 59 12 42 1 Regulatory assets – current 224 281 193 254 Total Regulatory Assets $5,541 $4,888 $5,164 $4,568 Regulatory liabilities Allowance for cost of removal less salvage $1,470 $1,456 $1,269 $1,266 Future income tax* 1,324 1,535 1,209 1,404 Unrecognized pension and other postretirement costs (b) 787 943 739 867 Pension and other postretirement benefit deferrals 370 284 312 233 Net unbilled revenue deferrals 260 278 260 278 Late payment charge deferral 227 167 221 161 System benefit charge carrying charge 111 92 106 88 Net proceeds from sale of property 31 48 30 47 Deferred derivative gains - long term 19 49 19 49 Settlement of prudence proceeding 10 11 10 11 Other 428 465 386 414 Regulatory liabilities – noncurrent 5,037 5,328 4,561 4,818 Refundable energy costs 81 71 43 36 Revenue decoupling mechanism 33 — — — Deferred derivative gains - short term 29 74 28 71 Regulatory liabilities – current 143 145 71 107 Total Regulatory Liabilities $5,180 $5,473 $4,632 $4,925 * See "Other Regulatory Matters," above. (a) Pursuant to their rate plans, CECONY and O&R are recovering the costs of legacy meters over a 15-year period beginning January 1, 2024 and a 12-year period beginning January 1, 2022, respectively. (b) Unrecognized pension and other postretirement costs represent the deferrals associated with the accounting rules for retirement benefits.
Schedule of Regulatory Assets Not Earning Return	Regulatory Assets Not Earning a Return* Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Environmental remediation costs $1,093 $1,105 $1,009 $1,022 Revenue taxes 558 490 535 470 COVID-19 deferral for uncollectible accounts receivable 391 291 384 288 Deferred derivative losses - current 165 269 152 253 Deferred derivative losses - long term 154 163 138 148 Unrecognized pension and other postretirement costs 10 — 10 — Other 75 29 63 28 Total $2,446 $2,347 $2,291 $2,209 *This table presents regulatory assets not earning a return for which no cash outlay has been made.

Capitalization (Tables)

Capitalization (Tables)	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Carrying Amounts and Fair Values of Long-Term Debt	The carrying amounts and fair values of long-term debt at September 30, 2024 and December 31, 2023 were: (Millions of Dollars) 2024 2023 Long-Term Debt (including current portion) (a) Carrying Fair Carrying Fair Con Edison (b) $23,688 $22,535 $22,177 $20,525 CECONY $22,446 $21,371 $21,060 $19,517 (a) Amounts shown are net of unamortized debt expense and unamortized debt discount of $237 million and $229 million for Con Edison and CECONY, respectively, as of September 30, 2024 and $222 million and $215 million for Con Edison and CECONY, respectively, as of December 31, 2023. (b) Amounts shown exclude the debt of Broken Bow II, a deferred project that was classified as held for sale as of December 31, 2023. The carrying value and fair value of Broken Bow II's long-term debt, including the current portion, as of September 30, 2024 was $61 million and $58 million, respectively. On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R and Note S.

Pension Benefits (Tables)

Pension Benefits (Tables)	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Total Periodic Benefit Costs	The components of the Companies’ total periodic benefit credit for the three and nine months ended September 30, 2024 and 2023 were as follows: For the Three Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Service cost – including administrative expenses $44 $40 $42 $38 Interest cost on projected benefit obligation 160 162 151 153 Expected return on plan assets (282) (279) (269) (265) Recognition of net actuarial gain (1) (58) (2) (55) Recognition of prior service credit (4) (4) (5) (5) TOTAL PERIODIC BENEFIT CREDIT $(83) $(139) $(83) $(134) Cost capitalized (22) (19) (21) (18) Reconciliation to rate level 12 72 10 66 Total credit recognized $(93) $(86) $(94) $(86) For the Nine Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Service cost – including administrative expenses $133 $122 $126 $113 Interest cost on projected benefit obligation 481 486 453 458 Expected return on plan assets (846) (837) (807) (795) Recognition of net actuarial gain (4) (174) (5) (164) Recognition of prior service credit (13) (12) (15) (15) TOTAL PERIODIC BENEFIT CREDIT $(249) $(415) $(248) $(403) Cost capitalized (68) (61) (65) (58) Reconciliation to rate level 39 218 31 202 Total credit recognized $(278) $(258) $(282) $(259) The components of the Companies’ total periodic other postretirement benefit credit for the three and nine months ended September 30, 2024 and 2023 were as follows: For the Three Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Service cost - including administrative expenses $3 $4 $3 $3 Interest cost on projected other postretirement benefit obligation 12 14 10 12 Expected return on plan assets (17) (18) (14) (14) Recognition of net actuarial gain (5) (4) (4) (2) TOTAL PERIODIC OTHER POSTRETIREMENT CREDIT $(7) $(4) $(5) $(1) Cost capitalized (2) (2) (1) (2) Reconciliation to rate level 4 1 3 — Total credit recognized $(5) $(5) $(3) $(3) For the Nine Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Service cost - including administrative expenses $9 $11 $8 $9 Interest cost on projected other postretirement benefit obligation 35 43 30 37 Expected return on plan assets (51) (53) (41) (42) Recognition of net actuarial gain (14) (12) (11) (6) Recognition of prior service credit (1) (1) — — TOTAL PERIODIC OTHER POSTRETIREMENT CREDIT $(22) $(12) $(14) $(2) Cost capitalized (4) (5) (4) (4) Reconciliation to rate level 12 2 10 (2) Total credit recognized $(14) $(15) $(8) $(8)

Other Postretirement Benefits (

Other Postretirement Benefits (Tables)	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Total Periodic Benefit Costs	The components of the Companies’ total periodic benefit credit for the three and nine months ended September 30, 2024 and 2023 were as follows: For the Three Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Service cost – including administrative expenses $44 $40 $42 $38 Interest cost on projected benefit obligation 160 162 151 153 Expected return on plan assets (282) (279) (269) (265) Recognition of net actuarial gain (1) (58) (2) (55) Recognition of prior service credit (4) (4) (5) (5) TOTAL PERIODIC BENEFIT CREDIT $(83) $(139) $(83) $(134) Cost capitalized (22) (19) (21) (18) Reconciliation to rate level 12 72 10 66 Total credit recognized $(93) $(86) $(94) $(86) For the Nine Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Service cost – including administrative expenses $133 $122 $126 $113 Interest cost on projected benefit obligation 481 486 453 458 Expected return on plan assets (846) (837) (807) (795) Recognition of net actuarial gain (4) (174) (5) (164) Recognition of prior service credit (13) (12) (15) (15) TOTAL PERIODIC BENEFIT CREDIT $(249) $(415) $(248) $(403) Cost capitalized (68) (61) (65) (58) Reconciliation to rate level 39 218 31 202 Total credit recognized $(278) $(258) $(282) $(259) The components of the Companies’ total periodic other postretirement benefit credit for the three and nine months ended September 30, 2024 and 2023 were as follows: For the Three Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Service cost - including administrative expenses $3 $4 $3 $3 Interest cost on projected other postretirement benefit obligation 12 14 10 12 Expected return on plan assets (17) (18) (14) (14) Recognition of net actuarial gain (5) (4) (4) (2) TOTAL PERIODIC OTHER POSTRETIREMENT CREDIT $(7) $(4) $(5) $(1) Cost capitalized (2) (2) (1) (2) Reconciliation to rate level 4 1 3 — Total credit recognized $(5) $(5) $(3) $(3) For the Nine Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Service cost - including administrative expenses $9 $11 $8 $9 Interest cost on projected other postretirement benefit obligation 35 43 30 37 Expected return on plan assets (51) (53) (41) (42) Recognition of net actuarial gain (14) (12) (11) (6) Recognition of prior service credit (1) (1) — — TOTAL PERIODIC OTHER POSTRETIREMENT CREDIT $(22) $(12) $(14) $(2) Cost capitalized (4) (5) (4) (4) Reconciliation to rate level 12 2 10 (2) Total credit recognized $(14) $(15) $(8) $(8)

Environmental Matters (Tables)

Environmental Matters (Tables)	9 Months Ended
	Sep. 30, 2024
Environmental Remediation Obligations [Abstract]
Accrued Liabilities and Regulatory Assets	The accrued liabilities and regulatory assets related to Superfund Sites at September 30, 2024 and December 31, 2023 were as follows: Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Accrued Liabilities: Manufactured gas plant sites $996 $1,016 $904 $924 Other Superfund Sites 105 102 105 102 Total $1,101 $1,118 $1,009 $1,026 Regulatory assets $1,093 $1,105 $1,010 $1,022
Environmental Remediation Costs	Environmental investigation and remediation costs incurred related to Superfund Sites for the three and nine months ended September 30, 2024 and 2023 were as follows: For the Three Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Remediation costs incurred $12 $1 $12 $1 For the Nine Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Remediation costs incurred $27 $8 $27 $8
Accrued Liability for Asbestos Suits and Workers' Compensation Proceedings	The accrued liability for asbestos suits and workers’ compensation proceedings (including those related to asbestos exposure) and the amounts deferred as regulatory assets or liabilities for the Companies at September 30, 2024 and December 31, 2023 were as follows: Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Accrued liability – asbestos suits $8 $8 $7 $7 Regulatory assets – asbestos suits $8 $8 $7 $7 Accrued liability – workers’ compensation $55 $56 $53 $54 Regulatory liabilities – workers’ compensation $18 $17 $18 $17

Material Contingencies (Tables)

Material Contingencies (Tables)	9 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Summary of Total Guarantees	A summary, by type and term, of Con Edison's total guarantees under these agreements at September 30, 2024 is as follows: Guarantee Type 0 – 3 years > 10 years Total (Millions of Dollars) Con Edison Transmission $54 $— $54 Broken Bow II — 9 9 Total $54 $9 $63

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2024
Leases [Abstract]
Lease Costs, Cash Flows and Other Related Information	Operating lease cost and cash paid for amounts included in the measurement of lease liabilities for the three and nine months ended September 30, 2024 and 2023 were as follows: For the Three Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Operating lease cost $17 $17 $17 $17 Operating lease cash flows $6 $6 $6 $6 For the Nine Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023(a) 2024 2023 Operating lease cost $50 $53 $49 $49 Operating lease cash flows $15 $17 $14 $14 (a) Amounts for Con Edison include amounts for the Clean Energy Businesses through February 2023. On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R and Note S.

Income Tax (Tables)

Income Tax (Tables)	9 Months Ended
	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Schedule of Income Tax Reconciliation	Reconciliation of the difference between income tax expense and the amount computed by applying the prevailing statutory income tax rate to income before income taxes for the three months ended September 30, 2024 and 2023 is as follows: For the Three Months Ended September 30, Con Edison CECONY (% of Pre-tax income) 2024 2023 2024 2023 STATUTORY TAX RATE Federal 21 % 21 % 21 % 21 % Changes in computed taxes resulting from: State income tax, net of federal income taxes 5 8 5 5 Amortization of excess deferred federal income taxes (7) (6) (7) (7) Cost of removal 1 1 1 1 Allowance for uncollectible accounts, net of COVID-19 assistance (1) (2) (1) (2) Changes in state apportionments, net of federal income taxes — 1 — — Other — (2) (1) (1) Effective tax rate 19 % 21 % 18 % 17 % Reconciliation of the difference between income tax expense and the amount computed by applying the prevailing statutory income tax rate to income before income taxes for the nine months ended September 30, 2024 and 2023 is as follows: For the Nine Months Ended September 30, Con Edison CECONY (% of Pre-tax income) 2024 2023 2024 2023 STATUTORY TAX RATE Federal 21 % 21 % 21 % 21 % Changes in computed taxes resulting from: State income tax, net of federal income taxes 5 5 5 5 Cost of removal 2 1 2 2 Other plant-related items (1) — — (1) Renewable energy credits (1) (1) — — Amortization of excess deferred federal income taxes (8) (5) (9) (8) Other (1) — (1) — Impacts from the sale of the Clean Energy Businesses: Changes in state apportionments, net of federal income taxes — (1) — — Deferred unamortized ITC recognized on sale of subsidiary — (4) — — Effective tax rate 17 % 16 % 18 % 19 %

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table presents, for the three and nine months ended September 30, 2024 and 2023, revenue from contracts with customers as defined in ASC 606, "Revenue from Contracts with Customers," as well as additional revenue from sources other than contracts with customers, disaggregated by major source. For the Three Months Ended September 30, 2024 For the Three Months Ended September 30, 2023 (Millions of Dollars) Revenues from contracts with customers Other revenues (a) Total operating revenues Revenues from contracts with customers Other revenues (a) Total operating revenues CECONY Electric $3,493 ($117) 3,376 $3,195 $28 $3,223 Gas 364 (27) 337 338 (20) 318 Steam 52 (3) 49 46 3 49 Total CECONY $3,909 $(147) $3,762 $3,579 $11 $3,590 O&R Electric 309 (16) 293 $242 $4 $246 Gas 6 30 36 31 4 35 Total O&R $315 $14 $329 $273 $8 $281 Con Edison Transmission 1 — 1 1 — 1 Other (b) — — — — — — Total Con Edison $4,225 $(133) $4,092 $3,853 $19 $3,872 (a) For the Utilities, this includes primarily revenue or negative revenue adjustments from alternative revenue programs, such as the revenue decoupling mechanisms under their New York electric and gas rate plans. (b) Other includes the parent company, Con Edison's tax equity investments, the deferred project held for sale and consolidation adjustments. See Note S. For the Nine Months Ended September 30, 2024 For the Nine Months Ended September 30, 2023 (Millions of Dollars) Revenues from contracts with customers Other revenues (a) Total operating revenues Revenues from contracts with customers Other revenues (a) Total operating revenues CECONY Electric $8,300 $(112) $8,188 $7,449 $273 $7,722 Gas 2,177 (58) 2,119 2,117 23 2,140 Steam 436 (13) 423 414 11 425 Total CECONY $10,913 $(183) $10,730 $9,980 $307 $10,287 O&R Electric $688 (26) $662 $574 $14 $588 Gas 173 20 193 211 4 215 Total O&R $861 $(6) $855 $785 $18 $803 Clean Energy Businesses (c) Renewables $— $— $— $68 $— $68 Energy services — — — 7 — 7 Develop/Transfer Projects — — — 7 — 7 Other — — — — 47 47 Total Clean Energy Businesses $— $— $— $82 $47 $129 Con Edison Transmission 3 — 3 3 — 3 Other (b) — (1) (1) — (3) (3) Total Con Edison $11,777 $(190) $11,587 $10,850 $369 $11,219 (a) For the Utilities, this includes primarily revenue or negative revenue adjustments from alternative revenue programs, such as the revenue decoupling mechanisms under their New York electric and gas rate plans. For the Clean Energy Businesses, this included revenue from wholesale services. On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R and Note S. (b) Other includes the parent company, Con Edison's tax equity investments, the deferred project held for sale and consolidation adjustments. See Note S. (c) On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R and Note S.
Change in Unbilled Contract and Unearned Revenues	2024 2023 (Millions of Dollars) Unbilled contract revenue (a) Unearned revenue (b) Unbilled contract revenue (a) Unearned revenue (b) Beginning balance as of January 1, $4 $— $80 $3 Additions (c) — — 2 — Subtractions (c) — — 78 3 (d) Ending balance as of September 30, $4 $— $4 (e) $— (a) Unbilled contract revenue represents accumulated incurred costs and earned profits on contracts (revenue arrangements), which have been recorded as revenue, but have not yet been billed to customers, and which represent contract assets as defined in Topic 606. Substantially all accrued unbilled contract revenue is expected to be collected within one year. Unbilled contract revenue arises from the cost-to-cost method of revenue recognition. Unbilled contract revenue from fixed-price type contracts is converted to billed receivables when amounts are invoiced to customers according to contractual billing terms, which generally occur when deliveries or other performance milestones are completed. (b) Unearned revenue represents a liability for billings to customers in excess of earned revenue, which are contract liabilities as defined in Topic 606. (c) Additions for unbilled contract revenue and subtractions for unearned revenue represent additional revenue earned. Additions for unearned revenue and subtractions for unbilled contract revenue represent billings. Activity also includes appropriate balance sheet classification for the period. Of the subtractions in 2023, $21 million and $1 million relate to the sale of all of the stock of the Clean Energy Businesses for unbilled contract revenue and unearned revenue, respectively. See (e) below. (d) Of the subtractions from unearned revenue, $3 million was included in the balances as of January 1, 2023. (e) Following the sale of all of the stock of the Clean Energy Businesses, Con Edison received substantially all contract revenue, net of certain costs incurred, for a battery storage project located in Imperial County, California. See Note R.

Current Expected Credit Losses

Current Expected Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2024
Credit Loss [Abstract]
Rollforward of Allowance for Credit Losses	The table below presents a rollforward by major portfolio segment type for the three and nine months ended September 30, 2024 and 2023: For the Three Months Ended September 30, Con Edison CECONY Accounts receivable - customers Other receivables Accounts receivable - customers Other receivables (Millions of Dollars) 2024 2023 2024 2023 2024 2023 2024 2023 Allowance for credit losses Beginning Balance at July 1, $434 $275 $25 $28 $419 $266 $21 $24 Recoveries — 3 — — — 3 — — Write-offs (65) (43) — (4) (63) (41) — (3) Reserve adjustments 92 41 (1) 7 92 41 — 6 Ending Balance September 30, $461 $276 $24 $31 $448 $269 $21 $27 For the Nine Months Ended September 30, 2024 Con Edison CECONY Accounts receivable - customers Other receivables Accounts receivable - customers Other receivables (Millions of Dollars) 2024 2023 2024 2023 2024 2023 2024 2023 Allowance for credit losses Beginning Balance at January 1, $360 $322 $13 $10 $353 $314 $9 $7 Recoveries 17 11 — — 13 10 — — Write-offs (160) (135) — (5) (152) (130) — (3) Reserve adjustments 244 78 11 26 234 75 12 23 Ending Balance September 30, $461 $276 $24 $31 $448 $269 $21 $27

Financial Information by Busi_2

Financial Information by Business Segment (Tables)	9 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Financial Data for Business Segments	The financial data for the business segments for the three and nine months ended September 30, 2024 and 2023 were as follows: For the Three Months Ended September 30, Operating Inter-segment Depreciation and Operating (Millions of Dollars) 2024 2023 2024 2023 2024 2023 2024 2023 CECONY Electric $3,376 $3,223 $5 $4 $376 $352 $998 $867 Gas 337 318 2 2 117 108 (112) (108) Steam 49 49 19 19 27 25 (83) (80) Consolidation adjustments — — (26) (25) — — — — Total CECONY $3,762 $3,590 $— $— $520 $485 $803 $679 O&R Electric 293 246 — — 21 19 72 59 Gas 36 35 — — 9 7 (9) (11) Total O&R $329 $281 $— $— $30 $26 $63 $48 Con Edison Transmission 1 1 — — — 1 (1) (2) Other (a) — — — — — — (3) (3) Total Con Edison $4,092 $3,872 $— $— $550 $512 $862 $722 (a) Other includes the parent company, Con Edison’s tax equity investments, the deferred project held for sale and consolidation adjustments. See Note S. For the Nine Months Ended September 30, Operating Inter-segment Depreciation and Operating (Millions of Dollars) 2024 2023 2024 2023 2024 2023 2024 2023 CECONY Electric $8,188 $7,722 $15 $14 $1,090 $1,035 $1,511 $1,292 Gas 2,119 2,140 7 6 343 319 588 533 Steam 423 425 56 55 79 74 8 (75) Consolidation adjustments — — (78) (75) — — — — Total CECONY $10,730 $10,287 $— $— $1,512 $1,428 $2,107 $1,750 O&R Electric 662 588 — — 61 56 97 73 Gas 193 215 — — 26 22 30 27 Total O&R $855 $803 $— $— $87 $78 $127 $100 Clean Energy Businesses (a) — 129 — — — — — 37 Con Edison Transmission 3 3 — — 1 1 (6) (6) Other (b) (1) (3) — — 1 (1) (35) 864 Total Con Edison $11,587 $11,219 $— $— $1,601 $1,506 $2,193 $2,745 (a) On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. As a result of this sale, the Clean Energy Businesses are no longer a principal segment. See Note R and Note S. (b) Other includes the parent company, Con Edison’s tax equity investments, the deferred project held for sale and consolidation adjustments. See Note S.

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Offsetting of Liabilities	The fair values of the Companies’ derivatives including the offsetting of assets and liabilities on the consolidated balance sheet at September 30, 2024 and December 31, 2023 were: (Millions of Dollars) 2024 2023 Balance Sheet Location Gross Amounts of Recognized Assets (Liabilities) Gross Net Amounts of Assets (Liabilities) (a) Gross Amounts of Recognized Assets (Liabilities) Gross Net Amounts of Assets (Liabilities) (a) Con Edison Fair value of derivative assets Current $64 $(53) $11 (b) $83 $(38) $45 (b) Noncurrent 44 (23) 21 77 (29) 48 Total fair value of derivative assets $108 $(76) $32 $160 $(67) $93 Fair value of derivative liabilities Current $(159) $57 $(102) (b) $(230) $52 $(178) (b) Noncurrent (147) 27 (120) (154) 33 (121) Total fair value of derivative liabilities $(306) $84 $(222) $(384) $85 $(299) Net fair value derivative assets (liabilities) $(198) $8 $(190) $(224) $18 $(206) CECONY Fair value of derivative assets Current $60 $(50) $10 (b) $78 $(35) $43 (b) Noncurrent 42 (22) 20 76 (27) 49 Total fair value of derivative assets $102 $(72) $30 $154 $(62) $92 Fair value of derivative liabilities Current $(147) $54 $(93) (b) $(217) $48 $(169) (b) Noncurrent (131) 25 (106) (139) 31 (108) Total fair value of derivative liabilities $(278) $79 $(199) $(356) $79 $(277) Net fair value derivative assets (liabilities) $(176) $7 $(169) $(202) $17 $(185) (a) Derivative instruments and collateral were offset on the consolidated balance sheet as applicable under the accounting rules. The Companies enter into master agreements for their commodity derivatives. These agreements typically provide offset in the event of contract termination. In such case, generally the non-defaulting party’s payable will be offset by the defaulting party’s payable. The non-defaulting party will customarily notify the defaulting party within a specific time period and come to an agreement on the early termination amount. (b) At September 30, 2024, margin deposits for Con Edison ($4 million and $(7) million) were classified as derivative assets and derivative liabilities, respectively, and for CECONY ($3 million and $(2) million) were classified as derivative assets and derivative liabilities, respectively, on the consolidated balance sheets, but not included in the table. At December 31, 2023 margin deposits for Con Edison ($7 million and $(15) million) were classified as derivative assets and derivative liabilities, respectively, and for CECONY ($6 million and $(10) million) were classified as derivative assets and derivative liabilities, respectively, on the consolidated balance sheets, but not included in the table. Margin is collateral, typically cash, that the holder of a derivative instrument is required to deposit in order to transact on an exchange and to cover its potential losses with its broker or the exchange.
Offsetting of Assets	The fair values of the Companies’ derivatives including the offsetting of assets and liabilities on the consolidated balance sheet at September 30, 2024 and December 31, 2023 were: (Millions of Dollars) 2024 2023 Balance Sheet Location Gross Amounts of Recognized Assets (Liabilities) Gross Net Amounts of Assets (Liabilities) (a) Gross Amounts of Recognized Assets (Liabilities) Gross Net Amounts of Assets (Liabilities) (a) Con Edison Fair value of derivative assets Current $64 $(53) $11 (b) $83 $(38) $45 (b) Noncurrent 44 (23) 21 77 (29) 48 Total fair value of derivative assets $108 $(76) $32 $160 $(67) $93 Fair value of derivative liabilities Current $(159) $57 $(102) (b) $(230) $52 $(178) (b) Noncurrent (147) 27 (120) (154) 33 (121) Total fair value of derivative liabilities $(306) $84 $(222) $(384) $85 $(299) Net fair value derivative assets (liabilities) $(198) $8 $(190) $(224) $18 $(206) CECONY Fair value of derivative assets Current $60 $(50) $10 (b) $78 $(35) $43 (b) Noncurrent 42 (22) 20 76 (27) 49 Total fair value of derivative assets $102 $(72) $30 $154 $(62) $92 Fair value of derivative liabilities Current $(147) $54 $(93) (b) $(217) $48 $(169) (b) Noncurrent (131) 25 (106) (139) 31 (108) Total fair value of derivative liabilities $(278) $79 $(199) $(356) $79 $(277) Net fair value derivative assets (liabilities) $(176) $7 $(169) $(202) $17 $(185) (a) Derivative instruments and collateral were offset on the consolidated balance sheet as applicable under the accounting rules. The Companies enter into master agreements for their commodity derivatives. These agreements typically provide offset in the event of contract termination. In such case, generally the non-defaulting party’s payable will be offset by the defaulting party’s payable. The non-defaulting party will customarily notify the defaulting party within a specific time period and come to an agreement on the early termination amount. (b) At September 30, 2024, margin deposits for Con Edison ($4 million and $(7) million) were classified as derivative assets and derivative liabilities, respectively, and for CECONY ($3 million and $(2) million) were classified as derivative assets and derivative liabilities, respectively, on the consolidated balance sheets, but not included in the table. At December 31, 2023 margin deposits for Con Edison ($7 million and $(15) million) were classified as derivative assets and derivative liabilities, respectively, and for CECONY ($6 million and $(10) million) were classified as derivative assets and derivative liabilities, respectively, on the consolidated balance sheets, but not included in the table. Margin is collateral, typically cash, that the holder of a derivative instrument is required to deposit in order to transact on an exchange and to cover its potential losses with its broker or the exchange.
Realized and Unrealized Gains or Losses on Commodity Derivatives	The following table presents the realized and unrealized gains or losses on derivatives that have been deferred or recognized in earnings for the three and nine months ended September 30, 2024 and 2023: For the Three Months Ended September 30, Con Edison CECONY (Millions of Dollars) Financial Statement Location 2024 2023 2024 2023 Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: Current Regulatory liabilities $(31) $(11) $(27) $(9) Noncurrent Regulatory liabilities (7) (11) (5) (9) Total deferred gains (losses) $(38) $(22) $(32) $(18) Current Regulatory assets $(18) $22 $(15) $20 Current Recoverable energy costs (81) (98) (75) (94) Noncurrent Regulatory assets (39) (34) (34) (29) Total deferred gains (losses) $(138) $(110) $(124) $(103) Net deferred gains (losses) $(176) $(132) $(156) $(121) Pre-tax gains (losses) recognized in income Other operations and maintenance expense $(1) $1 $(1) $1 Total pre-tax gains (losses) recognized in income $(1) $1 $(1) $1 For the Nine Months Ended September 30, Con Edison CECONY (Millions of Dollars) Financial Statement Location 2024 2023 2024 2023 Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: Current Regulatory liabilities $(45) $(221) $(42) $(203) Noncurrent Regulatory liabilities (30) (128) (30) (113) Total deferred gains (losses) $(75) $(349) $(72) $(316) Current Regulatory assets $104 $47 $102 $45 Current Recoverable energy costs (269) (474) (247) (449) Noncurrent Regulatory assets 9 (68) 9 (63) Total deferred gains (losses) $(156) $(495) $(136) $(467) Net deferred gains (losses) (a) $(231) $(844) $(208) $(783) Pre-tax gains (losses) recognized in income Gas purchased for resale (b) $— $4 $— $— Non-utility revenue (b) — 17 — — Other operations and maintenance expense — 1 — 1 Other interest expense (b) — 5 — — Total pre-tax gains (losses) recognized in income $— $27 $— $1 (a) Unrealized net deferred losses on electric and gas derivatives for the Utilities decreased as a result of higher electric and gas commodity prices during the nine months ended September 30, 2024. Upon settlement, short-term deferred derivative losses generally increase the recoverable costs of electric and gas purchases. (b) Comprised of realized and unrealized gains and losses on the derivative contracts of the Clean Energy Businesses. On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note R.
Hedged Volume of Derivative Transactions	The following table presents the hedged volume of Con Edison’s and CECONY’s commodity derivative transactions at September 30, 2024: Electric Energy Capacity (MW-mos) (a) Natural Gas Refined Fuels Con Edison 36,052,760 36,600 337,880,000 2,520,000 CECONY 32,953,250 28,200 316,190,000 2,520,000 (a) Volumes are reported net of long and short positions, except natural gas collars where the volumes of long positions are reported. (b) Excludes electric congestion and gas basis swap contracts which are associated with electric and gas contracts and hedged volumes.
Aggregate Fair Value of Companies' Derivative Instruments with Credit-Risk-Related Contingent Features	The following table presents the aggregate fair value of the Companies’ derivative instruments with credit-risk-related contingent features that are in a net liability position, the collateral posted for such positions and the additional collateral that would have been required to be posted had the lowest applicable credit rating been reduced one level and to below investment grade at September 30, 2024: (Millions of Dollars) Con Edison (a) CECONY (a) Aggregate fair value – net liabilities $215 $193 Collateral posted 181 175 Additional collateral (b) (downgrade one level from current ratings) 12 3 Additional collateral (b)(c) (downgrade to below investment grade from current ratings) 166 136 (a) Non-derivative transactions for the purchase and sale of electricity and gas and qualifying derivative instruments, that have been designated as normal purchases or normal sales, are excluded from the table. These transactions primarily include purchases of electricity from independent system operators. In the event the Utilities are no longer extended unsecured credit for such purchases, the Companies would be required to post $1 million of additional collateral at September 30, 2024. For certain other such non-derivative transactions, the Companies could be required to post collateral under certain circumstances, including in the event counterparties had reasonable grounds for insecurity. (b) The Companies measure the collateral requirements by taking into consideration the fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position plus amounts owed to counterparties for settled transactions and amounts required by counterparties for minimum financial security. The fair value amounts represent unrealized losses, net of any unrealized gains where the Companies have a legally enforceable right to offset. (c) Derivative instruments that are net assets have been excluded from the table. At September 30, 2024, if Con Edison had been downgraded to below investment grade, it would have been required to post additional collateral for such derivative instruments of $7 million.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis as of September 30, 2024 and December 31, 2023 are summarized below. 2024 2023 (Millions of Dollars) Level 1 Level 2 Level 3 Netting Total Level 1 Level 2 Level 3 Netting Total Con Edison Derivative assets: Commodity (a)(b)(c) $3 $92 $1 $(60) $36 $6 $146 $2 $(54) $100 Mutual Funds (a)(b) 574 — — — 574 505 — — — 505 Cash Value of Life Insurance Policies (a)(b) — 133 — — 133 — 118 — — 118 Total assets $577 $225 $1 $(60) $743 $511 $264 $2 $(54) $723 Derivative liabilities: Commodity (a)(b)(c) $8 $260 $26 $(65) 229 $22 $347 $10 $(65) $314 CECONY Derivative assets: Commodity (a)(b)(c) $3 $89 $1 $(60) $33 $6 $143 $1 $(52) $98 Mutual Funds (a)(b) 557 — — — 557 488 — — — 488 Cash Value of Life Insurance Policies (a)(b) — 127 — — 127 — 113 — — 113 Total assets $560 $216 $1 $(60) $717 $494 $256 $1 $(52) $699 Derivative liabilities: Commodity (a)(b)(c) $6 $244 $18 $(67) 201 $20 $326 $6 $(65) $287 (a) The Companies’ policy is to review the fair value hierarchy and recognize transfers into and transfers out of the levels at the end of each reporting period . Con Edison and CECON Y had $5 million of commodity derivative assets and an immaterial amount of liabilities transferred from level 3 to level 2 during the nine months ended September 30, 2024 because of availability of observable market data due to the decrease in the terms of certain contracts from beyond three years as of December 31, 2023 to less than three years as of September 30, 2024. Con Edison and CECONY had an immaterial amount of derivative assets and $9 million and $6 million of commodity derivative liabilities, respectively, transferred from level 3 to level 2 during the year ended December 31, 2023 because of availability of observable market data due to the decrease in the terms of certain contracts from beyond three years as of September 30, 2023 to less than three years as of December 31, 2023. (b) Level 2 assets and liabilities include investments held in the deferred compensation plan and/or non-qualified retirement plans, exchange-traded contracts where there is insufficient market liquidity to warrant inclusion in Level 1, and certain over-the-counter derivative instruments for electricity, refined products and natural gas. Derivative instruments classified as Level 2 are valued using industry standard models that incorporate corroborated observable inputs, such as pricing services or prices from similar instruments that trade in liquid markets, time value and volatility factors. (c) The accounting rules for fair value measurements and disclosures require consideration of the impact of nonperformance risk (including credit risk) from a market participant perspective in the measurement of the fair value of assets and liabilities. At September 30, 2024 and December 31, 2023, the Companies determined that nonperformance risk would have no material impact on their financial position or results of operations. (d)
Schedule of Commodity Derivatives	Fair Value of Level 3 at September 30, 2024 Valuation Unobservable Inputs Range Average (Millions of Dollars) Con Edison – Commodity Electricity $(12) Discounted Cash Flow Forward energy prices ($/MWh) (a) $33.80-$109.05 $58.66 Electricity (14) Discounted Cash Flow Forward capacity prices ($/kW-month) (a) $0.96-$7.53 $3.92 Transmission Congestion Contracts 1 Discounted Cash Flow Inter-zonal forward price curves adjusted for historical zonal losses ($/MWh) (b) $0.18-$3.35 $1.10 Total Con Edison—Commodity $(25) CECONY – Commodity Electricity $(12) Discounted Cash Flow Forward energy prices ($/MWh) (a) $35.70-$109.05 $59.06 Electricity (6) Discounted Cash Flow Forward capacity prices ($/kW-month) (a) $0.96-$7.53 $3.96 Transmission Congestion Contracts 1 Discounted Cash Flow Inter-zonal forward price curves adjusted for historical zonal losses ($/MWh) (b) $0.18-$3.35 $1.10 Total CECONY—Commodity $(17) (a) Generally, increases (decreases) in this input in isolation would result in a higher (lower) fair value measurement. (b) Generally, increases (decreases) in this input in isolation would result in a lower (higher) fair value measurement.
Reconciliation of Beginning and Ending Net Balances for Assets and Liabilities Measured at Level 3 Fair Value	The table listed below provides a reconciliation of the beginning and ending net balances for assets and liabilities measured at fair value as of September 30, 2024 and 2023 and classified as Level 3 in the fair value hierarchy: For the Three Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Beginning balance as of July 1, $(11) $(7) $(6) $(4) Included in earnings (1) 2 — 1 Included in regulatory assets and liabilities (15) (3) (12) (3) Settlements 2 (2) 1 (1) Ending balance as of September 30, $(25) $(10) $(17) $(7) For the Nine Months Ended September 30, Con Edison CECONY (Millions of Dollars) 2024 2023 2024 2023 Beginning balance as of January 1, $(8) $15 $(5) $(6) Included in earnings (6) (2) (2) (1) Included in regulatory assets and liabilities (13) 16 (8) 10 Settlements 7 — 3 — Decrease due to the sale of the Clean Energy Businesses (a) — (29) — — Transfer out of level 3 (5) (10) (5) (10) Ending balance as of September 30, $(25) $(10) $(17) $(7)

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
	Sep. 30, 2024
Related Party Transactions [Abstract]
Summary of Costs of Administrative and Other Services Provided and Received	The costs of administrative and other services provided by CECONY to, and received by it from, Con Edison and its other subsidiaries for the three and nine months ended September 30, 2024 and 2023 were as follows: For the Three Months Ended September 30, CECONY (a) (Millions of Dollars) 2024 2023 Cost of services provided $39 $39 Cost of services received $21 $21 For the Nine Months Ended September 30, CECONY (a) (Millions of Dollars) 2024 2023 Cost of services provided $106 $105 Cost of services received $62 $61

Dispositions (Tables)

Dispositions (Tables)	9 Months Ended
	Sep. 30, 2024
Discontinued Operations and Disposal Groups [Abstract]
Pre-Tax Operating Income for Clean Energy Businesses	The following table shows the pre-tax operating income for the Clean Energy Businesses. The 2023 period shown is through the date of the sale of the Clean Energy Businesses; there is no applicable data for the three and nine months ended September 30, 2024 . Nine Months Ended September 30, 2023 (Millions of Dollars) 2023 Pre-tax operating income $25 Pre-tax operating income, excluding non-controlling interest $21 At September 30, 2024 , the carrying amounts of the major classes of assets and liabilities of Broken Bow II that are expected to be sold are presented on a held-for-sale basis, and accordingly exclude net deferred tax liability balances, as follows: (Millions of Dollars) September 30, ASSETS CURRENT ASSETS Cash and temporary cash investments $1 Accrued unbilled revenue 1 Restricted cash 8 Other current assets 2 TOTAL CURRENT ASSETS 12 NON-UTILITY PLANT Non-utility property, net accumulated depreciation 76 NET PLANT 76 OTHER NONCURRENT ASSETS Intangible assets less accumulated amortization 72 Operating lease right-of-use asset 7 TOTAL OTHER NONCURRENT ASSETS 79 TOTAL ASSETS $167 (Millions of Dollars) September 30, LIABILITIES CURRENT LIABILITIES Long-term debt due within one year $2 Operating lease liabilities 2 Other current liabilities 9 TOTAL CURRENT LIABILITIES 13 NONCURRENT LIABILITIES Asset retirement obligations 3 Operating lease liabilities 5 TOTAL NONCURRENT LIABILITIES 8 LONG-TERM DEBT 59 TOTAL LIABILITIES $80

Assets and Liabilities Held-f_2

Assets and Liabilities Held-for-Sale (Tables)	9 Months Ended
	Sep. 30, 2024
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Carrying Amounts of Assets and Liabilities Held For Sale	The following table shows the pre-tax operating income for the Clean Energy Businesses. The 2023 period shown is through the date of the sale of the Clean Energy Businesses; there is no applicable data for the three and nine months ended September 30, 2024 . Nine Months Ended September 30, 2023 (Millions of Dollars) 2023 Pre-tax operating income $25 Pre-tax operating income, excluding non-controlling interest $21 At September 30, 2024 , the carrying amounts of the major classes of assets and liabilities of Broken Bow II that are expected to be sold are presented on a held-for-sale basis, and accordingly exclude net deferred tax liability balances, as follows: (Millions of Dollars) September 30, ASSETS CURRENT ASSETS Cash and temporary cash investments $1 Accrued unbilled revenue 1 Restricted cash 8 Other current assets 2 TOTAL CURRENT ASSETS 12 NON-UTILITY PLANT Non-utility property, net accumulated depreciation 76 NET PLANT 76 OTHER NONCURRENT ASSETS Intangible assets less accumulated amortization 72 Operating lease right-of-use asset 7 TOTAL OTHER NONCURRENT ASSETS 79 TOTAL ASSETS $167 (Millions of Dollars) September 30, LIABILITIES CURRENT LIABILITIES Long-term debt due within one year $2 Operating lease liabilities 2 Other current liabilities 9 TOTAL CURRENT LIABILITIES 13 NONCURRENT LIABILITIES Asset retirement obligations 3 Operating lease liabilities 5 TOTAL NONCURRENT LIABILITIES 8 LONG-TERM DEBT 59 TOTAL LIABILITIES $80

General (Details)

General (Details)	9 Months Ended
	Sep. 30, 2024 registrant subsidiary
Accounting Policies [Abstract]
Number of registrants | registrant	2
Number of regulated utility subsidiaries | subsidiary	2

Summary of Significant Accoun_4

Summary of Significant Accounting Policies and Other Matters - Narrative (Details) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Jun. 30, 2024 USD ($) mi	Sep. 30, 2024 USD ($) project	Sep. 30, 2024 USD ($) project	Mar. 01, 2023 project
Disposal Group, Held-for-sale, Not Discontinued Operations | Clean Energy Businesses
Schedule of Equity Method Investments [Line Items]
Tax equity projects | project		3	3	2
CET Electric | Mountain Valley Pipeline LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)		6.60%	6.60%
Mountain Valley Pipeline LLC | Con Edison Gas Pipeline and Storage, LLC
Schedule of Equity Method Investments [Line Items]
Number of miles in pipeline construction | mi	303
Aggregate project cost	$ 8,100
Equity method investments		$ 165	$ 165
Income (loss) from equity method investments		8	21
Income (loss) from equity method Investments, after tax		$ 6	15
Cash contributions for equity method investments			$ 530
Broken Bow II | Clean Energy Businesses | Electric Energy (MWh)
Schedule of Equity Method Investments [Line Items]
Deferred projects | project		1	1	1
Broken Bow II | Clean Energy Businesses | Disposal Group, Held-for-sale, Not Discontinued Operations | Clean Energy Businesses
Schedule of Equity Method Investments [Line Items]
Number of projects | project				3

Summary of Significant Accoun_5

Summary of Significant Accounting Policies and Other Matters - Earnings Per Common Share (Details) - 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
Accounting Policies [Abstract]
Net income for common stock	$ 588	$ 526	$ 1,510	$ 2,185
Weighted average common shares outstanding – basic (shares)	346.2	345	345.9	348.4
Add: Incremental shares attributable to effect of potentially dilutive securities (shares)	1.3	1.5	1.3	1.5
Adjusted weighted average common shares outstanding – diluted (shares)	347.5	346.5	347.2	349.9
Net income per common share - basic (dollars per share)	$ 1.70	$ 1.53	$ 4.37	$ 6.27
Net income per common share - diluted (dollars per share)	$ 1.69	$ 1.52	$ 4.35	$ 6.24

Summary of Significant Accoun_6

Summary of Significant Accounting Policies and Other Matters - Reconciliation of Cash, Temporary Investments and Restricted Cash (Details) $ in Millions	Sep. 30, 2024 USD ($) MWh	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Mar. 01, 2023 MWh
Cash and Cash Equivalents [Line Items]
Cash and temporary cash investments	$ 93	$ 1,189	$ 539
Restricted cash	9		6
Total cash, temporary cash investments and restricted cash	$ 102		$ 545
Electric Energy (MWh)
Cash and Cash Equivalents [Line Items]
Notional amount | MWh	36,052,760
Broken Bow II | Electric Energy (MWh) | Clean Energy Businesses
Cash and Cash Equivalents [Line Items]
Notional amount | MWh	75			75

Regulatory Matters - Rate Plans

Regulatory Matters - Rate Plans and Bill Relief Narrative (Details) - USD ($) $ in Millions	1 Months Ended
	May 31, 2024	Apr. 30, 2024	Mar. 31, 2024	Jan. 31, 2024
O&R
Public Utilities, General Disclosures [Line Items]
Bill relief program, amount received			$ 9
CECONY
Public Utilities, General Disclosures [Line Items]
Bill relief program, amount received			$ 91
Electric | O&R
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount	$ (27.6)	$ 10.7		$ 7.5
Return on common equity (as a percent)	950%	10.25%
Common equity ratio (percent)	4,800%	5,000%
Electric | O&R | Year 2
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount		$ 34.8
Electric | O&R | Year 3
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount		55
Gas | O&R
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount	$ (2.9)	$ 17.5		$ 3.1
Return on common equity (as a percent)	950%	10.25%
Common equity ratio (percent)	4,800%	5,000%
Gas | O&R | Year 2
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount		$ 22.8
Gas | O&R | Year 3
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount		$ 19.2

Regulatory Matters - Other Regu

Regulatory Matters - Other Regulatory Matters Narrative (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023	May 31, 2024	May 31, 2023
Public Utilities, General Disclosures [Line Items]
Other customer-provided capital rate (in percent)	5.95%	5.20%
Return on regulatory assets	$ 3,095	$ 2,541
Deferred derivative losses recovery period, current (in years)	1 year
Recovery period for deferred derivative losses (in years)	3 years
CECONY
Public Utilities, General Disclosures [Line Items]
Billing system costs	$ 510
Estimated capitalization costs	89
Incremental costs			$ 51
Net regulatory assets	1,066	1,113
CECONY | Maximum
Public Utilities, General Disclosures [Line Items]
Capital expenditures limit	$ 421	38		$ 421
CECONY | Commodity
Public Utilities, General Disclosures [Line Items]
Recovery period (in years)	4 years
CECONY | Subsidiaries
Public Utilities, General Disclosures [Line Items]
Return on regulatory assets	$ 2,873	2,359
O&R
Public Utilities, General Disclosures [Line Items]
Net regulatory assets	14	18
RECO | Subsidiaries
Public Utilities, General Disclosures [Line Items]
Return on regulatory assets	$ 24	$ 24

Regulatory Matters - Regulatory

Regulatory Matters - Regulatory Assets (Details) - USD ($) $ in Millions	Sep. 30, 2024	Jan. 01, 2024	Dec. 31, 2023	Jan. 01, 2022
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	$ 5,317		$ 4,607
Regulatory assets – current	224		281
Total Regulatory Assets	5,541		4,888
System peak reduction and energy efficiency programs
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	1,204		1,095
Environmental remediation costs
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	1,093		1,105
COVID - 19 pandemic deferrals
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	888		789
Revenue taxes
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	525		476
Legacy meters
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	420		17
Property tax reconciliation
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	176		169
Deferred storm costs
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	169		206
Deferred derivative losses - long term
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	154		163
Electric vehicle make ready
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	115		73
MTA power reliability deferral
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	38		61
Gas service line deferred costs
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	23		43
Unrecognized pension and other postretirement costs
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	10		0
Pension and other postretirement benefits deferrals
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	5		48
Other
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	497		362
Deferred derivative losses - short term
Regulatory Assets [Line Items]
Regulatory assets – current	165		269
Recoverable energy costs
Regulatory Assets [Line Items]
Regulatory assets – current	59		12
CECONY
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	4,971		4,314
Regulatory assets – current	193		254
CECONY | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	4,971		4,314
Regulatory assets – current	193		254
Total Regulatory Assets	5,164		4,568
CECONY | System peak reduction and energy efficiency programs | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	1,172		1,075
CECONY | Environmental remediation costs | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	1,010		1,022
CECONY | COVID - 19 pandemic deferrals | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	875		782
CECONY | Revenue taxes | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	503		455
CECONY | Legacy meters | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	405		0
CECONY | Property tax reconciliation | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	176		169
CECONY | Deferred storm costs | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	67		115
CECONY | Deferred derivative losses - long term | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	138		148
CECONY | Electric vehicle make ready | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	105		68
CECONY | MTA power reliability deferral | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	38		61
CECONY | Gas service line deferred costs | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	23		43
CECONY | Unrecognized pension and other postretirement costs | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	10		0
CECONY | Pension and other postretirement benefits deferrals | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	5		39
CECONY | Other | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – noncurrent	444		337
CECONY | Deferred derivative losses - short term | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – current	151		253
CECONY | Recoverable energy costs | Subsidiaries
Regulatory Assets [Line Items]
Regulatory assets – current	$ 42		$ 1
Consolidated Edison Company of New York, Inc. And Orange And Rockland | Legacy meters
Regulatory Assets [Line Items]
Cost of the program, recovery period (in years)		15 years		12 years

Regulatory Matters - Regulato_2

Regulatory Matters - Regulatory Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	$ 5,037	$ 5,328
Regulatory liabilities – current	143	145
Total Regulatory Liabilities	5,180	5,473
Regulatory assets	5,317	4,607
Regulatory assets	224	281
Allowance for cost of removal less salvage
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	1,470	1,456
Future income tax
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	1,324	1,535
Unrecognized pension and other postretirement costs
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	787	943
Pension and other postretirement benefit deferrals
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	370	284
Net unbilled revenue deferrals
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	260	278
Late payment charge deferral
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	227	167
System benefit charge carrying charge
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	111	92
Net proceeds from sale of property
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	31	48
Deferred derivative gains - long term
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	19	49
Settlement of prudence proceeding
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	10	11
Other
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	428	465
Refundable energy costs
Regulatory Liabilities [Line Items]
Regulatory liabilities – current	81	71
Revenue decoupling mechanism
Regulatory Liabilities [Line Items]
Regulatory liabilities – current	33	0
Deferred derivative gains - short term
Regulatory Liabilities [Line Items]
Regulatory liabilities – current	29	74
CECONY
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	4,561	4,818
Regulatory liabilities – current	71	107
Regulatory assets	4,971	4,314
Regulatory assets	193	254
CECONY | Subsidiaries
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	4,561	4,818
Regulatory liabilities – current	71	107
Total Regulatory Liabilities	4,632	4,925
Regulatory assets	4,971	4,314
Regulatory assets	193	254
CECONY | Allowance for cost of removal less salvage | Subsidiaries
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	1,269	1,266
CECONY | Future income tax | Subsidiaries
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	1,209	1,404
CECONY | Unrecognized pension and other postretirement costs | Subsidiaries
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	739	867
CECONY | Pension and other postretirement benefit deferrals | Subsidiaries
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	312	233
CECONY | Net unbilled revenue deferrals | Subsidiaries
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	260	278
CECONY | Late payment charge deferral | Subsidiaries
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	221	161
CECONY | System benefit charge carrying charge | Subsidiaries
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	106	88
CECONY | Net proceeds from sale of property | Subsidiaries
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	30	47
CECONY | Deferred derivative gains - long term | Subsidiaries
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	19	49
CECONY | Settlement of prudence proceeding | Subsidiaries
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	10	11
CECONY | Other | Subsidiaries
Regulatory Liabilities [Line Items]
Regulatory liabilities – noncurrent	386	414
CECONY | Refundable energy costs | Subsidiaries
Regulatory Liabilities [Line Items]
Regulatory liabilities – current	43	36
CECONY | Revenue decoupling mechanism | Subsidiaries
Regulatory Liabilities [Line Items]
Regulatory liabilities – current	0	0
CECONY | Deferred derivative gains - short term | Subsidiaries
Regulatory Liabilities [Line Items]
Regulatory liabilities – current	$ 28	$ 71

Regulatory Matters - Schedule o

Regulatory Matters - Schedule of Regulatory Assets Not Earning a Return (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Regulatory Assets [Line Items]
Regulatory assets not earning return	$ 2,446	$ 2,347
Subsidiaries | CECONY
Regulatory Assets [Line Items]
Regulatory assets not earning return	2,291	2,209
Environmental remediation costs
Regulatory Assets [Line Items]
Regulatory assets not earning return	1,093	1,105
Environmental remediation costs | Subsidiaries | CECONY
Regulatory Assets [Line Items]
Regulatory assets not earning return	1,009	1,022
Revenue taxes
Regulatory Assets [Line Items]
Regulatory assets not earning return	558	490
Revenue taxes | Subsidiaries | CECONY
Regulatory Assets [Line Items]
Regulatory assets not earning return	535	470
COVID-19 deferral for uncollectible accounts receivable
Regulatory Assets [Line Items]
Regulatory assets not earning return	391	291
COVID-19 deferral for uncollectible accounts receivable | Subsidiaries | CECONY
Regulatory Assets [Line Items]
Regulatory assets not earning return	384	288
Deferred derivative losses - short term
Regulatory Assets [Line Items]
Regulatory assets not earning return	165	269
Deferred derivative losses - short term | Subsidiaries | CECONY
Regulatory Assets [Line Items]
Regulatory assets not earning return	152	253
Deferred derivative losses - long term
Regulatory Assets [Line Items]
Regulatory assets not earning return	154	163
Deferred derivative losses - long term | Subsidiaries | CECONY
Regulatory Assets [Line Items]
Regulatory assets not earning return	138	148
Unrecognized pension and other postretirement costs
Regulatory Assets [Line Items]
Regulatory assets not earning return	10	0
Unrecognized pension and other postretirement costs | Subsidiaries | CECONY
Regulatory Assets [Line Items]
Regulatory assets not earning return	10	0
Other
Regulatory Assets [Line Items]
Regulatory assets not earning return	75	29
Other | Subsidiaries | CECONY
Regulatory Assets [Line Items]
Regulatory assets not earning return	$ 63	$ 28

Capitalization - Narrative (Det

Capitalization - Narrative (Details) - USD ($)	Oct. 31, 2024	Sep. 30, 2024	May 31, 2024
CECONY | Subsequent Event
Debt Instrument [Line Items]
Face amount of debt	$ 224,600,000
5.375 Percent Debentures, due 2034 | CECONY
Debt Instrument [Line Items]
Face amount of debt			$ 400,000,000
Interest rate (percent)			5.375%
5.70 Percent Debentures, due 2054 | CECONY
Debt Instrument [Line Items]
Face amount of debt			$ 1,000,000,000
Interest rate (percent)			5.70%
5.41 Percent Debentures, due 2054 | O&R
Debt Instrument [Line Items]
Face amount of debt		$ 125,000,000
Interest rate (percent)		5.41%

Capitalization - Carrying Amoun

Capitalization - Carrying Amounts and Fair Values of Long-Term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Unamortized debt expense	$ 237	$ 222
Carrying Amount
Debt Instrument [Line Items]
Long-term debt (including current portion)	23,688	22,177
Fair Value
Debt Instrument [Line Items]
Long-term debt (including current portion)	22,535	20,525
CECONY | Subsidiaries
Debt Instrument [Line Items]
Unamortized debt discount	229	215
CECONY | Carrying Amount | Subsidiaries
Debt Instrument [Line Items]
Long-term debt (including current portion)	22,446	21,060
CECONY | Fair Value | Subsidiaries
Debt Instrument [Line Items]
Long-term debt (including current portion)	21,371	$ 19,517
Broken Bow II | Carrying Amount
Debt Instrument [Line Items]
Long-term debt (including current portion)	61
Broken Bow II | Fair Value
Debt Instrument [Line Items]
Long-term debt (including current portion)	$ 58

Short-Term Borrowing (Details)

Short-Term Borrowing (Details)	1 Months Ended		9 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Short-term Debt [Line Items]
Ratio of consolidated debt to consolidated total capital			65
Percentage of liens of companies consolidated asset			0.10
Maximum aggregate limit of failure to pay debt or derivative obligations			$ 150,000,000
Commercial paper, outstanding			$ 2,059,000,000	$ 2,288,000,000
Weighted average interest rate of commercial paper (in percent)			5.10%	5.60%
Loans payable			$ 0	$ 0
Credit Availability Through March 2028 | Revolving Credit Facility
Short-term Debt [Line Items]
Maximum borrowing capacity			2,500,000,000
CECONY
Short-term Debt [Line Items]
Commercial paper, outstanding			$ 1,676,000,000	$ 1,903,000,000
Weighted average interest rate of commercial paper (in percent)			5.10%	5.60%
CECONY | Subsidiaries
Short-term Debt [Line Items]
Loans payable			$ 0	$ 0
CECONY | March 2022 Credit Agreement Variable Rate 364 Day Revolving Credit Agreement | Revolving Credit Facility | Subsidiaries
Short-term Debt [Line Items]
Debt instrument term (in years)		364 days
CECONY | March 2023 Credit Agreement Variable Rate 364 Day Revolving Credit Agreement | Revolving Credit Facility | Subsidiaries
Short-term Debt [Line Items]
Debt instrument term (in years)	364 days
Maximum borrowing capacity		$ 500,000,000

Pension Benefits - Total Period

Pension Benefits - Total Periodic Benefit Costs (Details) - Pension Benefits - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Service cost – including administrative expenses	$ 44	$ 40	$ 133	$ 122
Interest cost on projected benefit obligation	160	162	481	486
Expected return on plan assets	(282)	(279)	(846)	(837)
Recognition of net actuarial gain	(1)	(58)	(4)	(174)
Recognition of prior service credit	(4)	(4)	(13)	(12)
TOTAL PERIODIC BENEFIT CREDIT	(83)	(139)	(249)	(415)
Cost capitalized	(22)	(19)	(68)	(61)
Reconciliation to rate level	12	72	39	218
Total credit recognized	(93)	(86)	(278)	(258)
CECONY | Subsidiaries
Defined Benefit Plan Disclosure [Line Items]
Service cost – including administrative expenses	42	38	126	113
Interest cost on projected benefit obligation	151	153	453	458
Expected return on plan assets	(269)	(265)	(807)	(795)
Recognition of net actuarial gain	(2)	(55)	(5)	(164)
Recognition of prior service credit	(5)	(5)	(15)	(15)
TOTAL PERIODIC BENEFIT CREDIT	(83)	(134)	(248)	(403)
Cost capitalized	(21)	(18)	(65)	(58)
Reconciliation to rate level	10	66	31	202
Total credit recognized	$ (94)	$ (86)	$ (282)	$ (259)

Pension Benefits - Additional I

Pension Benefits - Additional Information (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions	$ 25
Contributions made by employer	15
CECONY | Pension Benefits | Subsidiaries
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions	22
Contributions made by employer	13
CECONY | External Trust | Subsidiaries
Defined Benefit Plan Disclosure [Line Items]
Contributions made by employer	$ 12

Other Postretirement Benefits -

Other Postretirement Benefits - Periodic Postretirement Benefit Costs (Details) - Other Postretirement Benefits - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Service cost - including administrative expenses	$ 3	$ 4	$ 9	$ 11
Interest cost on projected other postretirement benefit obligation	12	14	35	43
Expected return on plan assets	(17)	(18)	(51)	(53)
Recognition of net actuarial gain	(5)	(4)	(14)	(12)
Recognition of prior service credit			(1)	(1)
TOTAL PERIODIC OTHER POSTRETIREMENT CREDIT	(7)	(4)	(22)	(12)
Cost capitalized	(2)	(2)	(4)	(5)
Reconciliation to rate level	4	1	12	2
Total credit recognized	(5)	(5)	(14)	(15)
CECONY
Defined Benefit Plan Disclosure [Line Items]
Recognition of prior service credit			0	0
CECONY | Subsidiaries
Defined Benefit Plan Disclosure [Line Items]
Service cost - including administrative expenses	3	3	8	9
Interest cost on projected other postretirement benefit obligation	10	12	30	37
Expected return on plan assets	(14)	(14)	(41)	(42)
Recognition of net actuarial gain	(4)	(2)	(11)	(6)
TOTAL PERIODIC OTHER POSTRETIREMENT CREDIT	(5)	(1)	(14)	(2)
Cost capitalized	(1)	(2)	(4)	(4)
Reconciliation to rate level	3	0	10	(2)
Total credit recognized	$ (3)	$ (3)	$ (8)	$ (8)

Other Postretirement Benefits_2

Other Postretirement Benefits - Additional Information (Details) $ in Millions	Sep. 30, 2024 USD ($)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected future employer contributions, next fiscal year	$ 7

Environmental Matters - Accrued

Environmental Matters - Accrued Liabilities and Regulatory Assets (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Site Contingency [Line Items]
Accrued liabilities	$ 1,101	$ 1,118
Regulatory assets	5,541	4,888
Manufactured gas plant sites
Site Contingency [Line Items]
Accrued liabilities	996	1,016
Other Superfund Sites
Site Contingency [Line Items]
Accrued liabilities	105	102
Superfund Sites
Site Contingency [Line Items]
Accrued liabilities	1,101	1,118
Regulatory assets	1,093	1,105
CECONY
Site Contingency [Line Items]
Accrued liabilities	1,009	1,026
CECONY | Subsidiaries
Site Contingency [Line Items]
Regulatory assets	5,164	4,568
CECONY | Manufactured gas plant sites | Subsidiaries
Site Contingency [Line Items]
Accrued liabilities	904	924
CECONY | Other Superfund Sites | Subsidiaries
Site Contingency [Line Items]
Accrued liabilities	105	102
CECONY | Superfund Sites | Subsidiaries
Site Contingency [Line Items]
Accrued liabilities	1,009	1,026
Regulatory assets	$ 1,010	$ 1,022

Environmental Matters - Environ

Environmental Matters - Environmental Remediation Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Environmental Exit Cost [Line Items]
Remediation costs incurred	$ 12	$ 1	$ 27	$ 8
CECONY | Subsidiaries
Environmental Exit Cost [Line Items]
Remediation costs incurred	$ 12	$ 1	$ 27	$ 8

Environmental Matters - Additio

Environmental Matters - Additional Information (Details) - Superfund Sites - Manufactured Gas Plant Sites - Maximum $ in Millions	Sep. 30, 2024 USD ($)
Site Contingency [Line Items]
Estimated aggregate undiscounted potential liability related environmental contaminants (up to)	$ 3,440,000
CECONY
Site Contingency [Line Items]
Estimated aggregate undiscounted potential liability related environmental contaminants (up to)	$ 3,295,000

Environmental Matters - Accru_2

Environmental Matters - Accrued Liability (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Site Contingency [Line Items]
Regulatory assets	$ 5,541	$ 4,888
Asbestos Suits
Site Contingency [Line Items]
Accrued liability	8	8
Regulatory assets	8	8
Workers’ Compensation
Site Contingency [Line Items]
Accrued liability	55	56
Regulatory assets	18	17
CECONY | Subsidiaries
Site Contingency [Line Items]
Regulatory assets	5,164	4,568
CECONY | Asbestos Suits | Subsidiaries
Site Contingency [Line Items]
Accrued liability	7	7
Regulatory assets	7	7
CECONY | Workers’ Compensation | Subsidiaries
Site Contingency [Line Items]
Accrued liability	53	54
Regulatory assets	$ 18	$ 17

Material Contingencies - Additi

Material Contingencies - Additional Information (Details)		1 Months Ended	9 Months Ended
	Mar. 12, 2014 building people	Feb. 28, 2017 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2020 USD ($)
Loss Contingencies [Line Items]
Accrued regulatory liability			$ 5,037,000,000	$ 5,328,000,000
Guarantee obligations maximum exposure			63,000,000	$ 175,000,000
Guarantees on behalf of the Clean Energy Businesses
Loss Contingencies [Line Items]
Guarantee obligations maximum exposure			$ 0
Payment Guarantee by CET Electric of Contributions to New York Transco LLC
Loss Contingencies [Line Items]
Estimated project cost (in percent)			175%
NY Transco | Payment Guarantee by CET Electric of Contributions to New York Transco LLC
Loss Contingencies [Line Items]
Ownership interest (in percent)			45.70%
Manhattan Explosion and Fire
Loss Contingencies [Line Items]
Number of buildings destroyed by fire | building	2
Number of people died in explosion and fire incident | people	8
Number of people injured in explosion and fire incident (more than) | people	50
Amount of costs that will not recover from customers		$ 126,000,000
Loss contingency accrual			$ 40,000,000		$ 40,000,000
Insurance receivable			$ 40,000,000		$ 40,000,000
Manhattan Explosion and Fire | Settlement of Gas Proceedings
Loss Contingencies [Line Items]
Accrued regulatory liability		$ 27,000,000

Material Contingencies - Guaran

Material Contingencies - Guarantees (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Guarantor Obligations [Line Items]
Total guarantees, by type and term	$ 63	$ 175
Con Edison Transmission
Guarantor Obligations [Line Items]
Total guarantees, by type and term	54
Broken Bow II
Guarantor Obligations [Line Items]
Total guarantees, by type and term	9
0 – 3 years
Guarantor Obligations [Line Items]
Total guarantees, by type and term	54
0 – 3 years | Con Edison Transmission
Guarantor Obligations [Line Items]
Total guarantees, by type and term	54
0 – 3 years | Broken Bow II
Guarantor Obligations [Line Items]
Total guarantees, by type and term	0
Greater than 10 years
Guarantor Obligations [Line Items]
Total guarantees, by type and term	9
Greater than 10 years | Con Edison Transmission
Guarantor Obligations [Line Items]
Total guarantees, by type and term	0
Greater than 10 years | Broken Bow II
Guarantor Obligations [Line Items]
Total guarantees, by type and term	$ 9

Leases - Lease Cost and Cash Fl

Leases - Lease Cost and Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 17	$ 17	$ 50	$ 53
Operating lease cash flows	6	6	15	17
CECONY | Subsidiaries
Lessee, Lease, Description [Line Items]
Operating lease cost	17	17	49	49
Operating lease cash flows	$ 6	$ 6	$ 14	$ 14

Leases - Additional Information

Leases - Additional Information (Details) - CECONY - Subsidiaries	Sep. 30, 2024 lease_agreement
Lessee, Lease, Description [Line Items]
Number of operating lease agreements	2
Lease Expected To Commence In 2 Years With 15 Year Lease Term
Lessee, Lease, Description [Line Items]
Operating lease, lease not yet commenced, expected period to commence (in years)	2 years
Lease Expected To Commence In 3 Years With 15 Year Lease Term
Lessee, Lease, Description [Line Items]
Operating lease, not yet commenced, term of contract (in years)	15 years
Operating lease, lease not yet commenced, expected period to commence (in years)	3 years

Income Tax - Additional Informa

Income Tax - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Taxes Disclosure [Line Items]
Income tax expense (benefit)	$ 133	$ 144	$ 307	$ 416
Increase (decrease) in income taxes payable	(457)
Increase (decrease) in accumulated deferred tax liabilities	457
Accrued income taxes	73		73
Estimated liability for uncertain tax positions	13		13
Unrecognized tax benefits, increase resulting from current period tax positions			2
Effective income tax rate reconciliation, uncertainty of taxes			3
Unrecognized tax benefits, net	12		12
CECONY
Income Taxes Disclosure [Line Items]
Income tax expense (benefit)	119	109	301	297
Increase (decrease) in income taxes payable	(418)
Increase (decrease) in accumulated deferred tax liabilities	418
Accrued income taxes	64		64
CECONY | Subsidiaries
Income Taxes Disclosure [Line Items]
Income tax expense (benefit)	119	$ 109	301	$ 297
Estimated liability for uncertain tax positions	9		$ 9
O&R
Income Taxes Disclosure [Line Items]
Increase (decrease) in income taxes payable	(39)
Increase (decrease) in accumulated deferred tax liabilities	$ 39

Income Tax - Income Tax Reconci

Income Tax - Income Tax Reconciliation (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
STATUTORY TAX RATE
Federal	21%	21%	21%	21%
Changes in computed taxes resulting from:
State income tax, net of federal income taxes	5%	8%	5%	5%
Amortization of excess deferred federal income taxes	(7.00%)	(6.00%)	(8.00%)	(5.00%)
Cost of removal	1%	1%	2%	1%
Other plant-related items			(1.00%)	0%
Renewable energy credits			(1.00%)	(1.00%)
Allowance for uncollectible accounts, net of COVID-19 assistance	(1.00%)	(2.00%)
Changes in state apportionments, net of federal income taxes	0	0.01	0	(0.01)
Deferred unamortized ITC recognized on sale of subsidiary			0%	(4.00%)
Other	0%	2%	(1.00%)	0%
Effective tax rate	19%	21%	17%	16%
CECONY | Subsidiaries
STATUTORY TAX RATE
Federal	21%	21%	21%	21%
Changes in computed taxes resulting from:
State income tax, net of federal income taxes	5%	5%	5%	5%
Amortization of excess deferred federal income taxes	(7.00%)	(7.00%)	(9.00%)	(8.00%)
Cost of removal	1%	1%	2%	2%
Other plant-related items			0%	(1.00%)
Renewable energy credits			0%	0%
Allowance for uncollectible accounts, net of COVID-19 assistance	(1.00%)	(2.00%)
Changes in state apportionments, net of federal income taxes	0	0	0	0
Deferred unamortized ITC recognized on sale of subsidiary			0%	0%
Other	1%	1%	(1.00%)	0%
Effective tax rate	18%	17%	18%	19%

Revenue Recognition - Disaggreg

Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 4,225	$ 3,853	$ 11,777	$ 10,850
Total revenues	4,092	3,872	11,587	11,219
Other revenues
Disaggregation of Revenue [Line Items]
Total revenues	(133)	19	(190)	369
CECONY
Disaggregation of Revenue [Line Items]
Total revenues	3,762	3,590	10,730	10,287
Operating Segments
Disaggregation of Revenue [Line Items]
Total revenues	4,092	3,872	11,587	11,219
Operating Segments | Clean Energy Businesses
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers			0	82
Total revenues			0	129
Operating Segments | Clean Energy Businesses | Other revenues
Disaggregation of Revenue [Line Items]
Total revenues			0	47
Operating Segments | Clean Energy Businesses | Renewables
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers			0	68
Total revenues			0	68
Operating Segments | Clean Energy Businesses | Renewables | Other revenues
Disaggregation of Revenue [Line Items]
Total revenues			0	0
Operating Segments | Clean Energy Businesses | Energy services
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers			0	7
Total revenues			0	7
Operating Segments | Clean Energy Businesses | Energy services | Other revenues
Disaggregation of Revenue [Line Items]
Total revenues			0	0
Operating Segments | Clean Energy Businesses | Develop/Transfer Projects
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers			0	7
Total revenues			0	7
Operating Segments | Clean Energy Businesses | Develop/Transfer Projects | Other revenues
Disaggregation of Revenue [Line Items]
Total revenues			0	0
Operating Segments | Clean Energy Businesses | Other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers			0	0
Total revenues			0	47
Operating Segments | Clean Energy Businesses | Other | Other revenues
Disaggregation of Revenue [Line Items]
Total revenues			0	47
Operating Segments | Con Edison Transmission
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1	1	3	3
Total revenues	1	1	3	3
Operating Segments | Con Edison Transmission | Other revenues
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Operating Segments | CECONY | Subsidiaries
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,909	3,579	10,913	9,980
Total revenues	3,762	3,590	10,730	10,287
Operating Segments | CECONY | Other revenues | Subsidiaries
Disaggregation of Revenue [Line Items]
Total revenues	(147)	11	(183)	307
Operating Segments | CECONY | Electric | Subsidiaries
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,493	3,195	8,300	7,449
Total revenues	3,376	3,223	8,188	7,722
Operating Segments | CECONY | Electric | Other revenues | Subsidiaries
Disaggregation of Revenue [Line Items]
Total revenues	(117)	28	(112)	273
Operating Segments | CECONY | Gas | Subsidiaries
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	364	338	2,177	2,117
Total revenues	337	318	2,119	2,140
Operating Segments | CECONY | Gas | Other revenues | Subsidiaries
Disaggregation of Revenue [Line Items]
Total revenues	(27)	(20)	(58)	23
Operating Segments | CECONY | Steam | Subsidiaries
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	52	46	436	414
Total revenues	49	49	423	425
Operating Segments | CECONY | Steam | Other revenues | Subsidiaries
Disaggregation of Revenue [Line Items]
Total revenues	(3)	3	(13)	11
Operating Segments | O&R | Subsidiaries
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	315	273	861	785
Total revenues	329	281	855	803
Operating Segments | O&R | Other revenues | Subsidiaries
Disaggregation of Revenue [Line Items]
Total revenues	14	8	(6)	18
Operating Segments | O&R | Electric | Subsidiaries
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	309	242	688	574
Total revenues	293	246	662	588
Operating Segments | O&R | Electric | Other revenues | Subsidiaries
Disaggregation of Revenue [Line Items]
Total revenues	(16)	4	(26)	14
Operating Segments | O&R | Gas | Subsidiaries
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	6	31	173	211
Total revenues	36	35	193	215
Operating Segments | O&R | Gas | Other revenues | Subsidiaries
Disaggregation of Revenue [Line Items]
Total revenues	30	4	20	4
Other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Total revenues	0	0	(1)	(3)
Other | Other revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 0	$ 0	$ (1)	$ (3)

Revenue Recognition - Change in

Revenue Recognition - Change in Unbilled Contract and Unearned Revenues (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Jan. 01, 2023
Unbilled contract revenue
Beginning balance	$ 4	$ 80	$ 80
Additions	0	2
Subtractions	0	78
Ending balance	4	4	4
Unearned revenue
Beginning balance	0	3	3
Additions	0	0
Subtractions	0	3
Ending balance	$ 0	$ 0	0
Contracts with customer, revenue recognized, amount outstanding end of last period				$ 3
Clean Energy Businesses
Unbilled contract revenue
Subtractions			21
Unearned revenue
Subtractions			$ 1

Current Expected Credit Losse_2

Current Expected Credit Losses - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase (decrease) in allowance for uncollectible accounts resulting from COVID-19 pandemic	$ 27	$ 1	$ 101	$ (46)
Subsidiaries | CECONY
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase (decrease) in allowance for uncollectible accounts resulting from COVID-19 pandemic	$ 29	$ 3	$ 95	$ (45)

Current Expected Credit Losse_3

Current Expected Credit Losses - Rollforward of Segment Type (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accounts receivable - customers
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 434	$ 275	$ 360	$ 322
Recoveries	0	3	17	11
Write-offs	(65)	(43)	(160)	(135)
Reserve adjustments	92	41	244	78
Ending Balance	461	276	461	276
Other receivables
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	25	28	13	10
Recoveries	0	0	0	0
Write-offs	0	(4)	0	(5)
Reserve adjustments	(1)	7	11	26
Ending Balance	24	31	24	31
CECONY | Accounts receivable - customers | Subsidiaries
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	419	266	353	314
Recoveries	0	3	13	10
Write-offs	(63)	(41)	(152)	(130)
Reserve adjustments	92	41	234	75
Ending Balance	448	269	448	269
CECONY | Other receivables | Subsidiaries
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	21	24	9	7
Recoveries	0	0	0	0
Write-offs	0	(3)	0	(3)
Reserve adjustments	0	6	12	23
Ending Balance	$ 21	$ 27	$ 21	$ 27

Financial Information by Busi_3

Financial Information by Business Segment (Details) - 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]
Total revenues	$ 4,092	$ 3,872	$ 11,587	$ 11,219
Depreciation and amortization	550	512	1,601	1,506
Operating income (loss)	862	722	2,193	2,745
CECONY
Segment Reporting Information [Line Items]
Total revenues	3,762	3,590	10,730	10,287
Depreciation and amortization	520	485	1,512	1,428
Operating income (loss)	803	679	2,107	1,750
CECONY | Subsidiaries
Segment Reporting Information [Line Items]
Depreciation and amortization	520	485	1,512	1,428
Operating income (loss)	803	679	2,107	1,750
CECONY | Electric | Subsidiaries
Segment Reporting Information [Line Items]
Depreciation and amortization	376	352	1,090	1,035
Operating income (loss)	998	867	1,511	1,292
CECONY | Gas | Subsidiaries
Segment Reporting Information [Line Items]
Depreciation and amortization	117	108	343	319
Operating income (loss)	(112)	(108)	588	533
CECONY | Steam | Subsidiaries
Segment Reporting Information [Line Items]
Depreciation and amortization	27	25	79	74
Operating income (loss)	(83)	(80)	8	(75)
O&R | Subsidiaries
Segment Reporting Information [Line Items]
Depreciation and amortization	30	26	87	78
Operating income (loss)	63	48	127	100
O&R | Electric | Subsidiaries
Segment Reporting Information [Line Items]
Depreciation and amortization	21	19	61	56
Operating income (loss)	72	59	97	73
O&R | Gas | Subsidiaries
Segment Reporting Information [Line Items]
Depreciation and amortization	9	7	26	22
Operating income (loss)	(9)	(11)	30	27
Operating segment
Segment Reporting Information [Line Items]
Total revenues	4,092	3,872	11,587	11,219
Operating segment | Clean Energy Businesses
Segment Reporting Information [Line Items]
Total revenues			0	129
Depreciation and amortization			0	0
Operating income (loss)			0	37
Operating segment | Con Edison Transmission
Segment Reporting Information [Line Items]
Total revenues	1	1	3	3
Depreciation and amortization	0	1	1	1
Operating income (loss)	(1)	(2)	(6)	(6)
Operating segment | CECONY | Subsidiaries
Segment Reporting Information [Line Items]
Total revenues	3,762	3,590	10,730	10,287
Operating segment | CECONY | Electric | Subsidiaries
Segment Reporting Information [Line Items]
Total revenues	3,376	3,223	8,188	7,722
Operating segment | CECONY | Gas | Subsidiaries
Segment Reporting Information [Line Items]
Total revenues	337	318	2,119	2,140
Operating segment | CECONY | Steam | Subsidiaries
Segment Reporting Information [Line Items]
Total revenues	49	49	423	425
Operating segment | O&R | Subsidiaries
Segment Reporting Information [Line Items]
Total revenues	329	281	855	803
Operating segment | O&R | Electric | Subsidiaries
Segment Reporting Information [Line Items]
Total revenues	293	246	662	588
Operating segment | O&R | Gas | Subsidiaries
Segment Reporting Information [Line Items]
Total revenues	36	35	193	215
Inter-segment | CECONY | Subsidiaries
Segment Reporting Information [Line Items]
Total revenues	(26)	(25)	(78)	(75)
Inter-segment | CECONY | Electric | Subsidiaries
Segment Reporting Information [Line Items]
Total revenues	5	4	15	14
Inter-segment | CECONY | Gas | Subsidiaries
Segment Reporting Information [Line Items]
Total revenues	2	2	7	6
Inter-segment | CECONY | Steam | Subsidiaries
Segment Reporting Information [Line Items]
Total revenues	19	19	56	55
Other
Segment Reporting Information [Line Items]
Total revenues	0	0	(1)	(3)
Depreciation and amortization	0	0	1	(1)
Operating income (loss)	$ (3)	$ (3)	$ (35)	$ 864

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Fair Values of Commodity Derivatives Including Offsetting (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Fair value of derivative assets
Net Amounts of Assets (Liabilities)	$ 743	$ 723
Net fair value derivative assets (liabilities)
Gross Amounts of Recognized Assets (Liabilities)	(198)	(224)
Gross Amounts Offset	8	18
Net Amounts of Assets/ (Liabilities)	(190)	(206)
CECONY | Subsidiaries
Fair value of derivative assets
Net Amounts of Assets (Liabilities)	717	699
Net fair value derivative assets (liabilities)
Gross Amounts of Recognized Assets (Liabilities)	(176)	(202)
Gross Amounts Offset	7	17
Net Amounts of Assets/ (Liabilities)	(169)	(185)
Current
Fair value of derivative liabilities
Gross Amounts of Recognized Assets (Liabilities)	(159)	(230)
Gross Amounts Offset	57	52
Net Amounts of Assets/ (Liabilities)	(102)	(178)
Current | CECONY | Subsidiaries
Fair value of derivative liabilities
Gross Amounts of Recognized Assets (Liabilities)	(147)	(217)
Gross Amounts Offset	54	48
Net Amounts of Assets/ (Liabilities)	(93)	(169)
Noncurrent
Fair value of derivative liabilities
Gross Amounts of Recognized Assets (Liabilities)	(147)	(154)
Gross Amounts Offset	27	33
Net Amounts of Assets/ (Liabilities)	(120)	(121)
Noncurrent | CECONY | Subsidiaries
Fair value of derivative liabilities
Gross Amounts of Recognized Assets (Liabilities)	(131)	(139)
Gross Amounts Offset	25	31
Net Amounts of Assets/ (Liabilities)	(106)	(108)
Total fair value of derivative liabilities
Fair value of derivative liabilities
Gross Amounts of Recognized Assets (Liabilities)	(306)	(384)
Gross Amounts Offset	84	85
Net Amounts of Assets/ (Liabilities)	(222)	(299)
Net fair value derivative assets (liabilities)
Margin deposit liability	(7)	(15)
Total fair value of derivative liabilities | CECONY
Net fair value derivative assets (liabilities)
Margin deposit liability		(10)
Total fair value of derivative liabilities | CECONY | Subsidiaries
Fair value of derivative liabilities
Gross Amounts of Recognized Assets (Liabilities)	(278)	(356)
Gross Amounts Offset	79	79
Net Amounts of Assets/ (Liabilities)	(199)	(277)
Net fair value derivative assets (liabilities)
Margin deposit liability	(2)
Current
Fair value of derivative assets
Gross Amounts of Recognized Assets (Liabilities)	64	83
Gross Amounts Offset	(53)	(38)
Net Amounts of Assets (Liabilities)	11	45
Current | CECONY | Subsidiaries
Fair value of derivative assets
Gross Amounts of Recognized Assets (Liabilities)	60	78
Gross Amounts Offset	(50)	(35)
Net Amounts of Assets (Liabilities)	10	43
Noncurrent
Fair value of derivative assets
Gross Amounts of Recognized Assets (Liabilities)	44	77
Gross Amounts Offset	(23)	(29)
Net Amounts of Assets (Liabilities)	21	48
Noncurrent | CECONY | Subsidiaries
Fair value of derivative assets
Gross Amounts of Recognized Assets (Liabilities)	42	76
Gross Amounts Offset	(22)	(27)
Net Amounts of Assets (Liabilities)	20	49
Total fair value of derivative assets
Fair value of derivative assets
Gross Amounts of Recognized Assets (Liabilities)	108	160
Gross Amounts Offset	(76)	(67)
Net Amounts of Assets (Liabilities)	32	93
Net fair value derivative assets (liabilities)
Margin deposits assets	4	7
Total fair value of derivative assets | CECONY
Net fair value derivative assets (liabilities)
Margin deposits assets		6
Total fair value of derivative assets | CECONY | Subsidiaries
Fair value of derivative assets
Gross Amounts of Recognized Assets (Liabilities)	102	154
Gross Amounts Offset	(72)	(62)
Net Amounts of Assets (Liabilities)	30	$ 92
Net fair value derivative assets (liabilities)
Margin deposits assets	$ 3

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Realized and Unrealized Gains (Losses) on Commodity Derivatives (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations:
Total deferred gains (losses)	$ (38)	$ (22)	$ (75)	$ (349)
Total deferred gains (losses)	(138)	(110)	(156)	(495)
Net deferred gains (losses)	$ (176)	$ (132)	$ (231)	$ (844)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Operating costs	Operating costs	Operating costs	Operating costs
Pre-tax gains (losses) recognized in income
Total pre-tax gains (losses) recognized in income	$ (1)	$ 1	$ 0	$ 27
Gas purchased for resale
Pre-tax gains (losses) recognized in income
Total pre-tax gains (losses) recognized in income			0	4
Non-utility revenue
Pre-tax gains (losses) recognized in income
Total pre-tax gains (losses) recognized in income			0	17
Other operations and maintenance expense
Pre-tax gains (losses) recognized in income
Total pre-tax gains (losses) recognized in income			0	1
Other interest expense
Pre-tax gains (losses) recognized in income
Total pre-tax gains (losses) recognized in income			0	5
Regulatory Liabilities, Current
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations:
Total deferred gains (losses)	(31)	(11)	(45)	(221)
Regulatory Liabilities, Noncurrent
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations:
Total deferred gains (losses)	(7)	(11)	(30)	(128)
Regulatory Assets Current
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations:
Total deferred gains (losses)	(18)	22	104	47
Recoverable Energy Costs, Current
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations:
Total deferred gains (losses)	(81)	(98)	(269)	(474)
Regulatory Assets Non Current
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations:
Total deferred gains (losses)	(39)	(34)	9	(68)
CECONY | Subsidiaries
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations:
Total deferred gains (losses)	(32)	(18)	(72)	(316)
Total deferred gains (losses)	(124)	(103)	(136)	(467)
Net deferred gains (losses)	(156)	(121)	(208)	(783)
Pre-tax gains (losses) recognized in income
Total pre-tax gains (losses) recognized in income	(1)	1	0	1
CECONY | Gas purchased for resale | Subsidiaries
Pre-tax gains (losses) recognized in income
Total pre-tax gains (losses) recognized in income			0	0
CECONY | Non-utility revenue | Subsidiaries
Pre-tax gains (losses) recognized in income
Total pre-tax gains (losses) recognized in income			0	0
CECONY | Other operations and maintenance expense | Subsidiaries
Pre-tax gains (losses) recognized in income
Total pre-tax gains (losses) recognized in income			0	1
CECONY | Other interest expense | Subsidiaries
Pre-tax gains (losses) recognized in income
Total pre-tax gains (losses) recognized in income			0	0
CECONY | Regulatory Liabilities, Current | Subsidiaries
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations:
Total deferred gains (losses)	(27)	(9)	(42)	(203)
CECONY | Regulatory Liabilities, Noncurrent | Subsidiaries
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations:
Total deferred gains (losses)	(5)	(9)	(30)	(113)
CECONY | Regulatory Assets Current | Subsidiaries
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations:
Total deferred gains (losses)	(15)	20	102	45
CECONY | Recoverable Energy Costs, Current | Subsidiaries
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations:
Total deferred gains (losses)	(75)	(94)	(247)	(449)
CECONY | Regulatory Assets Non Current | Subsidiaries
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations:
Total deferred gains (losses)	$ (34)	$ (29)	$ 9	$ (63)

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities - Hedged Volume of Derivative Transactions (Details)	Sep. 30, 2024 MW MWh gal MMBTU
Electric Energy (MWh)
Derivatives, Fair Value [Line Items]
Notional amount | MWh	36,052,760
Capacity (MW)
Derivatives, Fair Value [Line Items]
Notional amount | MW	36,600
Natural Gas (Dt)
Derivatives, Fair Value [Line Items]
Notional amount | MMBTU	337,880,000
Refined Fuels (gallons)
Derivatives, Fair Value [Line Items]
Notional amount | gal	2,520,000
CECONY | Electric Energy (MWh) | Subsidiaries
Derivatives, Fair Value [Line Items]
Notional amount | MWh	32,953,250
CECONY | Capacity (MW) | Subsidiaries
Derivatives, Fair Value [Line Items]
Notional amount | MW	28,200
CECONY | Natural Gas (Dt) | Subsidiaries
Derivatives, Fair Value [Line Items]
Notional amount | MMBTU	316,190,000
CECONY | Refined Fuels (gallons) | Subsidiaries
Derivatives, Fair Value [Line Items]
Notional amount | gal	2,520,000

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities - Additional Information (Details) $ in Millions	Sep. 30, 2024 USD ($)
Investment Holdings [Line Items]
Energy supply and hedging activities credit exposure total	$ 6
Makeup of net credit exposure with investment-grade counterparties	2
Makeup of net credit exposure with commodity exchange brokers	4
CECONY | Subsidiaries
Investment Holdings [Line Items]
Energy supply and hedging activities credit exposure total	5
Makeup of net credit exposure with investment-grade counterparties	2
Makeup of net credit exposure with commodity exchange brokers	$ 3

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities - Credit-Risk-Related Contingent Features (Details) $ in Millions	Sep. 30, 2024 USD ($)
Derivatives, Fair Value [Line Items]
Aggregate fair value – net liabilities	$ 215
Collateral posted	181
Additional collateral (downgrade to below investment grade from current ratings)	1
Derivatives in net asset position additional collateral	7
Downgrade One Level from Current Ratings
Derivatives, Fair Value [Line Items]
Additional collateral (downgrade one level from current ratings)	12
Downgrade to Below Investment Grade from Current Ratings
Derivatives, Fair Value [Line Items]
Additional collateral (downgrade one level from current ratings)	166
CECONY | Subsidiaries
Derivatives, Fair Value [Line Items]
Aggregate fair value – net liabilities	193
Collateral posted	175
CECONY | Downgrade One Level from Current Ratings | Subsidiaries
Derivatives, Fair Value [Line Items]
Additional collateral (downgrade one level from current ratings)	3
CECONY | Downgrade to Below Investment Grade from Current Ratings | Subsidiaries
Derivatives, Fair Value [Line Items]
Additional collateral (downgrade one level from current ratings)	$ 136

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	$ 743,000,000	$ 723,000,000
Liabilities transferred out of Level 3	0
Assets transferred out of level 3	5,000,000	0
CECONY
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets transferred out of level 3		0
CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	717,000,000	699,000,000
Assets transferred out of level 3	5,000,000
Netting Adjustment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	(60,000,000)	(54,000,000)
Netting Adjustment | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	(60,000,000)	(52,000,000)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	577,000,000	511,000,000
Level 1 | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	560,000,000	494,000,000
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	225,000,000	264,000,000
Level 2 | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	216,000,000	256,000,000
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	1,000,000	2,000,000
Level 3 | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	1,000,000	1,000,000
Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	36,000,000	100,000,000
Derivative liabilities:	229,000,000	314,000,000
Liabilities transferred out of Level 3		9,000,000
Commodity | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	33,000,000	98,000,000
Derivative liabilities:	201,000,000	287,000,000
Liabilities transferred out of Level 3	0	6,000,000
Commodity | Netting Adjustment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	(60,000,000)	(54,000,000)
Derivative liabilities:	(65,000,000)	(65,000,000)
Commodity | Netting Adjustment | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	(60,000,000)	(52,000,000)
Derivative liabilities:	(67,000,000)	(65,000,000)
Commodity | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	3,000,000	6,000,000
Derivative liabilities:	8,000,000	22,000,000
Commodity | Level 1 | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	3,000,000	6,000,000
Derivative liabilities:	6,000,000	20,000,000
Commodity | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	92,000,000	146,000,000
Derivative liabilities:	260,000,000	347,000,000
Commodity | Level 2 | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	89,000,000	143,000,000
Derivative liabilities:	244,000,000	326,000,000
Commodity | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	1,000,000	2,000,000
Derivative liabilities:	26,000,000	10,000,000
Commodity | Level 3 | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	1,000,000	1,000,000
Derivative liabilities:	18,000,000	6,000,000
Mutual Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	574,000,000	505,000,000
Mutual Funds | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	557,000,000	488,000,000
Mutual Funds | Netting Adjustment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	0	0
Mutual Funds | Netting Adjustment | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	0	0
Mutual Funds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	574,000,000	505,000,000
Mutual Funds | Level 1 | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	557,000,000	488,000,000
Mutual Funds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	0	0
Mutual Funds | Level 2 | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	0	0
Mutual Funds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	0	0
Mutual Funds | Level 3 | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	0	0
Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	133,000,000	118,000,000
Other | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	127,000,000	113,000,000
Other | Netting Adjustment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	0	0
Other | Netting Adjustment | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	0	0
Other | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	0	0
Other | Level 1 | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	0	0
Other | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	133,000,000	118,000,000
Other | Level 2 | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	127,000,000	113,000,000
Other | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	0	0
Other | Level 3 | CECONY | Subsidiaries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets:	$ 0	$ 0

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Commodity Derivatives (Details) $ in Millions	Sep. 30, 2024 USD ($) $ / kW-month $ / MWh	Dec. 31, 2023 USD ($)
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair Value of commodity derivatives | $	$ 743	$ 723
CECONY | Subsidiaries
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair Value of commodity derivatives | $	717	699
Level 3
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair Value of commodity derivatives | $	1	2
Level 3 | CECONY | Subsidiaries
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair Value of commodity derivatives | $	1	$ 1
Level 3 | Electricity | Forward energy prices
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair Value of commodity derivatives | $	$ (12)
Level 3 | Electricity | Forward energy prices | Minimum
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / MWh	33.80
Level 3 | Electricity | Forward energy prices | Maximum
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / MWh	109.05
Level 3 | Electricity | Forward energy prices | Average Market Price
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / MWh	58.66
Level 3 | Electricity | Forward energy prices | CECONY | Subsidiaries
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair Value of commodity derivatives | $	$ (12)
Level 3 | Electricity | Forward energy prices | CECONY | Minimum | Subsidiaries
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / MWh	35.70
Level 3 | Electricity | Forward energy prices | CECONY | Maximum | Subsidiaries
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / MWh	109.05
Level 3 | Electricity | Forward energy prices | CECONY | Average Market Price | Subsidiaries
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / MWh	59.06
Level 3 | Electricity | Forward capacity prices
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair Value of commodity derivatives | $	$ (14)
Level 3 | Electricity | Forward capacity prices | Minimum
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / kW-month	0.96
Level 3 | Electricity | Forward capacity prices | Maximum
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / kW-month	7.53
Level 3 | Electricity | Forward capacity prices | Average Market Price
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / kW-month	3.92
Level 3 | Electricity | Forward capacity prices | CECONY | Subsidiaries
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair Value of commodity derivatives | $	$ (6)
Level 3 | Electricity | Forward capacity prices | CECONY | Minimum | Subsidiaries
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / kW-month	0.96
Level 3 | Electricity | Forward capacity prices | CECONY | Maximum | Subsidiaries
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / kW-month	7.53
Level 3 | Electricity | Forward capacity prices | CECONY | Average Market Price | Subsidiaries
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / kW-month	3.96
Level 3 | Transmission Congestion Contracts | Inter-zonal forward price curves adjusted for historical zonal losses
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair Value of commodity derivatives | $	$ 1
Level 3 | Transmission Congestion Contracts | Inter-zonal forward price curves adjusted for historical zonal losses | Minimum
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / MWh	0.18
Level 3 | Transmission Congestion Contracts | Inter-zonal forward price curves adjusted for historical zonal losses | Maximum
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / MWh	3.35
Level 3 | Transmission Congestion Contracts | Inter-zonal forward price curves adjusted for historical zonal losses | Average Market Price
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / MWh	1.10
Level 3 | Transmission Congestion Contracts | Inter-zonal forward price curves adjusted for historical zonal losses | CECONY | Subsidiaries
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair Value of commodity derivatives | $	$ 1
Level 3 | Transmission Congestion Contracts | Inter-zonal forward price curves adjusted for historical zonal losses | CECONY | Minimum | Subsidiaries
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / MWh	0.18
Level 3 | Transmission Congestion Contracts | Inter-zonal forward price curves adjusted for historical zonal losses | CECONY | Maximum | Subsidiaries
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / MWh	3.35
Level 3 | Transmission Congestion Contracts | Inter-zonal forward price curves adjusted for historical zonal losses | CECONY | Average Market Price | Subsidiaries
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Unobservable Inputs Range (dollar per unit) | $ / MWh	1.10
Level 3 | Commodity
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair Value of commodity derivatives | $	$ (25)
Level 3 | Commodity | CECONY | Subsidiaries
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair Value of commodity derivatives | $	$ (17)

Fair Value Measurements - Recon

Fair Value Measurements - Reconciliation of Assets and Liabilities Measured at Level 3 Fair Value (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ (11)	$ (7)	$ (8)	$ 15
Included in earnings	(1)	2	(6)	(2)
Included in regulatory assets and liabilities	(15)	(3)	(13)	16
Settlements	2	(2)	7	0
Decrease due to the sale of the Clean Energy Businesses			0	(29)
Transfer out of level 3			(5)	(10)
Ending balance	(25)	(10)	(25)	(10)
CECONY | Subsidiaries
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(6)	(4)	(5)	(6)
Included in earnings	0	1	(2)	(1)
Included in regulatory assets and liabilities	(12)	(3)	(8)	10
Settlements	1	(1)	3	0
Decrease due to the sale of the Clean Energy Businesses			0	0
Transfer out of level 3			(5)	(10)
Ending balance	$ (17)	$ (7)	$ (17)	$ (7)

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Clean Energy Businesses
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loss on Level 3 energy derivative assets and liabilities	$ 17

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Details) MMBTU in Thousands	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 30, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) MMBTU	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Related Party Transaction [Line Items]
Net assets		$ 21,898,000,000		$ 21,898,000,000		$ 21,158,000,000
Other income		157,000,000	$ 210,000,000	476,000,000	$ 625,000,000
Unconditional charitable contribution, accrued amount	$ 12,000,000
CECONY
Related Party Transaction [Line Items]
Net assets		19,873,000,000	19,113,000,000	19,873,000,000	19,113,000,000	19,146,000,000	$ 19,570,000,000	$ 19,597,000,000	$ 18,843,000,000	$ 18,892,000,000	$ 16,878,000,000
Income taxes due to Con Edison				452,000,000		110,000,000
Funding limit of CECONY to O&R (not to exceed)				250,000,000
CECONY | Subsidiaries
Related Party Transaction [Line Items]
Sale of natural gas		14,000,000	14,000,000	$ 52,000,000	60,000,000
CECONY | Related Party, Lending of Funds
Related Party Transaction [Line Items]
Lending period (not more than) (months)				12 months
CECONY | Equity Method Investee | Mountain Valley Pipeline LLC
Related Party Transaction [Line Items]
Contract term (years)				20 years
Generating capacity per day (in dekatherms) | MMBTU				200
CECONY | Mountain Valley Pipeline LLC | Related Party
Related Party Transaction [Line Items]
Other income		12,000,000	12,000,000	$ 12,000,000	12,000,000
O&R
Related Party Transaction [Line Items]
Net assets		1,134,000,000		1,134,000,000
Outstanding loans		0		0		$ 0
CET Electric | NY Transco | Related Party
Related Party Transaction [Line Items]
Other income		$ 0	$ 0	$ 0	$ 0
CET Electric | New York Transco's New York Enery Solution Project
Related Party Transaction [Line Items]
Ownership interest (in percent)		45.70%		45.70%
CET Electric | New York Transco's Propel NY Energy Project
Related Party Transaction [Line Items]
Ownership interest (in percent)		41.70%		41.70%
CET Electric | Mountain Valley Pipeline LLC
Related Party Transaction [Line Items]
Ownership interest (in percent)		6.60%		6.60%

Related Party Transactions - Su

Related Party Transactions - Summary of Costs of Administrative and Other Services Provided and Received (Details) - 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]
Cost of services provided	$ 4,092	$ 3,872	$ 11,587	$ 11,219
Cost of services received	3,230	3,149	9,364	9,340
CECONY
Related Party Transaction [Line Items]
Cost of services provided	3,762	3,590	10,730	10,287
Cost of services received	2,959	2,911	8,623	8,537
CECONY | Related Party
Related Party Transaction [Line Items]
Cost of services provided	39	39	106	105
Cost of services received	$ 21	$ 21	$ 62	$ 61

Dispositions - Narrative (Detai

Dispositions - Narrative (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024 USD ($) MWh project	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) MWh project	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Mar. 01, 2023 USD ($) MWh project	Oct. 01, 2022 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Period to obtain consent (in years)	2 years		2 years
Number of solar projects | project	2		2
Clean Energy Businesses | RWE | Maximum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Estimate of possible loss (up to)	$ 172,000,000		$ 172,000,000
Disposal Group, Held-for-sale, Not Discontinued Operations | Clean Energy Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration from sale of business						$ 3,993,000,000	$ 6,800,000,000
Gain on sale of subsidiary		$ 0	835,000,000	$ 866,000,000	$ 865,000,000
Gain on sale of subsidiary, after tax			745,000,000	784,000,000	767,000,000
Downward price adjustment			30,000,000
Downward price adjustment, after tax			$ 22,000,000
Tax equity projects | project	3		3			2
Transaction costs, before tax	$ 0	11,000,000	$ 0	11,000,000
Transaction costs, after tax		$ 8,000,000		$ 8,000,000
Depreciation and amortization, before tax					41,000,000
Depreciation and amortization, after tax					$ 28,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Crane Project
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Holding period (in years)			5 years
Carrying value of tax equity interest	$ 9,000,000		$ 9,000,000
Electric Energy (MWh)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Notional amount | MWh	36,052,760		36,052,760
Broken Bow II | Electric Energy (MWh) | Clean Energy Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deferred projects | project	1		1			1
Notional amount | MWh	75		75			75

Dispositions - Pre-Tax Operatin

Dispositions - Pre-Tax Operating Income (Details) - Clean Energy Businesses - Disposal Group, Held-for-sale, Not Discontinued Operations $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax operating income	$ 25
Pre-tax operating income, excluding non-controlling interest	$ 21

Assets and Liabilities Held-f_3

Assets and Liabilities Held-for-Sale - Additional Information (Details)	Sep. 30, 2024 MWh project	Mar. 01, 2023 MWh project
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Period to obtain consent (in years)	2 years
Electric Energy (MWh)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Notional amount | MWh	36,052,760
Clean Energy Businesses | Broken Bow II | Disposal Group, Held-for-sale, Not Discontinued Operations | Clean Energy Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of projects | project		3
Clean Energy Businesses | Broken Bow II | Electric Energy (MWh)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deferred projects | project	1	1
Notional amount | MWh	75	75

Assets and Liabilities Held-f_4

Assets and Liabilities Held-for-Sale - Schedule of Carrying Amounts (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
CURRENT ASSETS
TOTAL CURRENT ASSETS	$ 167	$ 163
Non-utility property, net accumulated depreciation	12	13
CURRENT LIABILITIES
TOTAL CURRENT LIABILITIES	80	$ 76
Disposal Group, Held-for-sale, Not Discontinued Operations | Clean Energy Businesses
CURRENT ASSETS
Cash and temporary cash investments	1
Accrued unbilled revenue	1
Restricted cash	8
Other current assets	2
TOTAL CURRENT ASSETS	12
Non-utility property, net accumulated depreciation	76
NET PLANT	76
OTHER NONCURRENT ASSETS
Intangible assets less accumulated amortization	72
Operating lease right-of-use asset	7
TOTAL OTHER NONCURRENT ASSETS	79
TOTAL ASSETS	167
CURRENT LIABILITIES
Long-term debt due within one year	2
Operating lease liabilities	2
Other current liabilities	9
TOTAL CURRENT LIABILITIES	13
NONCURRENT LIABILITIES
Asset retirement obligations	3
Operating lease liabilities	5
TOTAL NONCURRENT LIABILITIES	8
LONG-TERM DEBT	59
TOTAL LIABILITIES	$ 80