Document and Entity Information	9 Months Ended
Document and Entity Information	Sep. 30, 2010	Oct. 27, 2010
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2010
Document Fiscal Year Focus	2010
Document Fiscal Period Focus	Q3
Trading Symbol	ED
Entity Registrant Name	CONSOLIDATED EDISON INC
Entity Central Index Key	0001047862
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		290,536,094
CONSOLIDATED EDISON CO OF NEW YORK INC [Member]
Entity Registrant Name	CONSOLIDATED EDISON CO OF NEW YORK INC
Entity Central Index Key	0000023632
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer

Consolidated Income Statement (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2010	Sep. 30, 2009
INTEREST EXPENSE
NET INCOME FOR COMMON STOCK	$ 350	$ 336	$ 759	$ 666
Net income for common stock per common share - basic	$ 1.24	$ 1.22	$ 2.69	$ 2.43
Net income for common stock per common share - diluted	$ 1.23	$ 1.22	$ 2.68	$ 2.42
AVERAGE NUMBER OF SHARES OUTSTANDING - BASIC (IN MILLIONS)	283.0	275.1	282.2	274.5
AVERAGE NUMBER OF SHARES OUTSTANDING - DILUTED (IN MILLIONS)	284.6	276.0	283.7	275.4
CONSOLIDATED EDISON INC [Member]
OPERATING REVENUES
Electric	2,814	2,604	6,959	6,362
Gas	229	208	1,276	1,430
Steam	91	77	487	521
Non-utility	573	600	1,463	1,445
TOTAL OPERATING REVENUES	3,707	3,489	10,185	9,758
OPERATING EXPENSES
Purchased power	1,425	1,338	3,708	3,543
Fuel	106	83	342	403
Gas purchased for resale	73	89	482	723
Other operations and maintenance	738	676	2,117	1,879
Depreciation and amortization	211	200	626	589
Taxes, other than income taxes	449	418	1,283	1,145
TOTAL OPERATING EXPENSES	3,002	2,804	8,558	8,282
OPERATING INCOME	705	685	1,627	1,476
OTHER INCOME (DEDUCTIONS)
Investment and other income	9	3	29	25
Allowance for equity funds used during construction	4	4	13	9
Other deductions	(3)	(3)	(12)	(11)
TOTAL OTHER INCOME (DEDUCTIONS)	10	4	30	23
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	715	689	1,657	1,499
INTEREST EXPENSE
Interest on long-term debt	152	148	450	441
Other interest	7	10	13	20
Allowance for borrowed funds used during construction	(2)	(3)	(7)	(6)
NET INTEREST EXPENSE	157	155	456	455
INCOME BEFORE INCOME TAX EXPENSE	558	534	1,201	1,044
INCOME TAX EXPENSE	205	195	433	369
NET INCOME	353	339	768	675
Preferred stock dividend requirements of subsidiary	(3)	(3)	(9)	(9)
NET INCOME FOR COMMON STOCK	350	336	759	666
Net income for common stock per common share - basic	$ 1.24	$ 1.22	$ 2.69	$ 2.43
Net income for common stock per common share - diluted	$ 1.23	$ 1.22	$ 2.68	$ 2.42
DIVIDENDS DECLARED PER SHARE OF COMMON STOCK	$ 0.595	$ 0.59	$ 1.785	$ 1.77
AVERAGE NUMBER OF SHARES OUTSTANDING - BASIC (IN MILLIONS)	283.0	275.1	282.2	274.5
AVERAGE NUMBER OF SHARES OUTSTANDING - DILUTED (IN MILLIONS)	284.6	276.0	283.7	275.4
CECONY [Member]
OPERATING REVENUES
Electric	2,570	2,395	6,402	5,865
Gas	204	183	1,126	1,259
Steam	91	77	487	521
TOTAL OPERATING REVENUES	2,865	2,655	8,015	7,645
OPERATING EXPENSES
Purchased power	764	753	2,102	2,009
Fuel	105	83	343	404
Gas purchased for resale	63	76	408	618
Other operations and maintenance	637	573	1,832	1,606
Depreciation and amortization	198	188	586	554
Taxes, other than income taxes	432	403	1,232	1,101
TOTAL OPERATING EXPENSES	2,199	2,076	6,503	6,292
OPERATING INCOME	666	579	1,512	1,353
OTHER INCOME (DEDUCTIONS)
Investment and other income	5	8	23	23
Allowance for equity funds used during construction	3	3	10	8
Other deductions	(2)	(3)	(11)	(10)
TOTAL OTHER INCOME (DEDUCTIONS)	6	8	22	21
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	672	587	1,534	1,374
INTEREST EXPENSE
Interest on long-term debt	137	134	406	399
Other interest	5	11	13	19
Allowance for borrowed funds used during construction	(1)	(2)	(6)	(6)
NET INTEREST EXPENSE	141	143	413	412
INCOME BEFORE INCOME TAX EXPENSE	531	444	1,121	962
INCOME TAX EXPENSE	196	159	404	339
NET INCOME	335	285	717	623
Preferred stock dividend requirements of subsidiary	(3)	(3)	(8)	(8)
NET INCOME FOR COMMON STOCK	$ 332	$ 282	$ 709	$ 615

Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2010 CONSOLIDATED EDISON INC [Member]	Sep. 30, 2009 CONSOLIDATED EDISON INC [Member]	Sep. 30, 2010 CECONY [Member]	Sep. 30, 2009 CECONY [Member]
OPERATING ACTIVITIES
Net Income	$ 768	$ 675	$ 717	$ 623
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	626	589	586	554
Deferred income taxes	562	255	562	222
Rate case amortization and accruals	8	(38)	8	(38)
Common equity component of allowance for funds used during construction	(13)	(9)	(10)	(8)
Net derivative (gains)/losses	35	(2)
Other non-cash items (net)	(19)	(39)	(96)	(46)
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable - customers, less allowance for uncollectibles	(114)	55	(84)	39
Materials and supplies, including fuel oil and gas in storage	(9)	118	(9)	99
Other receivables and other current assets	(114)	(171)	(208)	(49)
Prepayments	(473)	257	(309)	177
Recoverable energy costs		102		127
Accounts payable	(105)	(168)	(96)	(245)
Pensions and retiree benefits	(33)	(35)	(30)	(22)
Accrued taxes	63	(9)	20	(3)
Accrued interest	45	53	37	31
Deferred charges, deferred derivative losses, noncurrent assets and other regulatory assets	(472)	(9)	(374)	2
Deferred credits and other regulatory liabilities	142	(118)	131	(90)
Other assets	(8)	(4)
Other liabilities	82	(33)	93	(47)
NET CASH FLOWS FROM OPERATING ACTIVITIES	971	1,469	938	1,326
INVESTING ACTIVITIES
Utility construction expenditures	(1,455)	(1,524)	(1,371)	(1,454)
Cost of removal less salvage	(103)	(126)	(100)	(123)
Non-utility construction expenditures	(6)	(5)
Common equity component of allowance for funds used during construction	13	9	10	8
Purchase of additional ownership interest in Honeoye Storage Corporation	(12)
Loan to affiliate				113
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(1,563)	(1,646)	(1,461)	(1,456)
FINANCING ACTIVITIES
Net proceeds from short-term debt	846	146	832	174
Retirement of long-term debt	(781)	(279)	(625)	(275)
Issuance of long-term debt	870	750	700	750
Issuance of common stock	78	25
Debt issuance costs	(6)	(5)	(6)	(5)
Capital contribution by parent			36
Common stock dividends	(468)	(450)	(502)	(489)
Preferred stock dividends	(9)	(9)	(8)	(8)
NET CASH FLOWS FROM FINANCING ACTIVITIES	530	178	427	147
CASH AND TEMPORARY CASH INVESTMENTS:
NET CHANGE FOR THE PERIOD	(62)	1	(96)	17
BALANCE AT BEGINNING OF PERIOD	260	74	131	37
BALANCE AT END OF PERIOD	198	75	35	54
Cash paid during the period for:
Interest	394	377	357	356
Income taxes	$ 284	$ 4	$ 263	$ 17

Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Sep. 30, 2010	Dec. 31, 2009
CURRENT ASSETS
Regulatory Assets	$ 7,257	$ 7,275
OTHER NONCURRENT ASSETS
Regulatory assets	6,981	7,103
DEFERRED CREDITS AND REGULATORY LIABILITIES
Regulatory liabilities	931	829
CONSOLIDATED EDISON INC [Member]
CURRENT ASSETS
Cash and temporary cash investments	198	260
Accounts receivable - customers, less allowance for uncollectible accounts	1,161	1,047
Accrued unbilled revenue	547	579
Other receivables, less allowance for uncollectible accounts	503	379
Fuel oil, gas in storage, materials and supplies, at average cost	364	355
Prepayments	604	131
Regulatory Assets	276	172
Revenue decoupling mechanism receivable	5	117
Other current assets	232	174
TOTAL CURRENT ASSETS	3,890	3,214
INVESTMENTS	391	385
UTILITY PLANT AT ORIGINAL COST
Electric	19,793	18,645
Gas	4,180	3,983
Steam	2,027	1,935
General	1,904	1,866
TOTAL	27,904	26,429
Less: Accumulated depreciation	5,707	5,412
Net	22,197	21,017
Construction work in progress	1,223	1,422
NET UTILITY PLANT	23,420	22,439
NON-UTILITY PLANT
Non-utility property, less accumulated depreciation	46	19
Construction work in progress	3	6
NET PLANT	23,469	22,464
OTHER NONCURRENT ASSETS
Goodwill	429	416
Intangible assets, less accumulated amortization of $3 and $2 in 2010 and 2009, respectively	3	4
Regulatory assets	6,981	7,103
Other deferred charges and noncurrent assets	289	258
TOTAL OTHER NONCURRENT ASSETS	7,702	7,781
TOTAL ASSETS	35,452	33,844
CURRENT LIABILITIES
Long-term debt due within one year	5	731
Notes payable	846
Accounts payable	1,068	1,173
Customer deposits	283	274
Accrued taxes	115	51
Accrued interest	201	156
Accrued wages	89	91
Fair value of derivative liabilities	159	114
Other current liabilities	381	350
TOTAL CURRENT LIABILITIES	3,147	2,940
NONCURRENT LIABILITIES
Obligations under capital leases	8	14
Provision for injuries and damages	172	168
Pensions and retiree benefits	2,826	3,363
Superfund and other environmental costs	239	212
Asset retirement obligations	127	122
Fair value of derivative liabilities	127	131
Other noncurrent liabilities	112	108
TOTAL NONCURRENT LIABILITIES	3,611	4,118
DEFERRED CREDITS AND REGULATORY LIABILITIES
Deferred income taxes and investment tax credits	6,229	5,609
Regulatory liabilities	931	829
Other deferred credits	24	32
TOTAL DEFERRED CREDITS AND REGULATORY LIABILITIES	7,184	6,470
LONG-TERM DEBT	10,667	9,854
SHAREHOLDER'S EQUITY
Common shareholder's equity (See Statement of Shareholder's Equity)	10,630	10,249
Preferred stock	213	213
TOTAL SHAREHOLDER'S EQUITY	10,843	10,462
TOTAL LIABILITIES AND SHAREHOLDER'S EQUITY	35,452	33,844
CECONY [Member]
CURRENT ASSETS
Cash and temporary cash investments	35	131
Accounts receivable - customers, less allowance for uncollectible accounts	988	904
Accrued unbilled revenue	384	413
Other receivables, less allowance for uncollectible accounts	77	134
Accounts receivable from affiliated companies	482	124
Fuel oil, gas in storage, materials and supplies, at average cost	319	310
Prepayments	391	82
Regulatory Assets	218	104
Revenue decoupling mechanism receivable	4	107
Other current assets	94	89
TOTAL CURRENT ASSETS	2,992	2,398
INVESTMENTS	156	126
UTILITY PLANT AT ORIGINAL COST
Electric	18,685	17,570
Gas	3,708	3,537
Steam	2,027	1,935
General	1,741	1,708
TOTAL	26,161	24,750
Less: Accumulated depreciation	5,220	4,947
Net	20,941	19,803
Construction work in progress	1,118	1,334
NET UTILITY PLANT	22,059	21,137
NON-UTILITY PLANT
Non-utility property, less accumulated depreciation	8	9
NET PLANT	22,067	21,146
OTHER NONCURRENT ASSETS
Regulatory assets	6,450	6,590
Other deferred charges and noncurrent assets	231	201
TOTAL OTHER NONCURRENT ASSETS	6,681	6,791
TOTAL ASSETS	31,896	30,461
CURRENT LIABILITIES
Long-term debt due within one year		625
Notes payable	832
Accounts payable	846	937
Accounts payable to affiliated companies	12	17
Customer deposits	270	259
Accrued taxes	29	41
Accrued taxes to affiliated companies	41	9
Accrued interest	174	137
Accrued wages	86	89
Other current liabilities	427	333
TOTAL CURRENT LIABILITIES	2,717	2,447
NONCURRENT LIABILITIES
Obligations under capital leases	8	14
Provision for injuries and damages	166	160
Pensions and retiree benefits	2,485	2,978
Superfund and other environmental costs	154	159
Asset retirement obligations	127	122
Fair value of derivative liabilities	40	44
Other noncurrent liabilities	103	68
TOTAL NONCURRENT LIABILITIES	3,083	3,545
DEFERRED CREDITS AND REGULATORY LIABILITIES
Deferred income taxes and investment tax credits	5,724	5,139
Regulatory liabilities	810	703
Other deferred credits	21	29
TOTAL DEFERRED CREDITS AND REGULATORY LIABILITIES	6,555	5,871
LONG-TERM DEBT	9,737	9,038
SHAREHOLDER'S EQUITY
Common shareholder's equity (See Statement of Shareholder's Equity)	9,591	9,347
Preferred stock	213	213
TOTAL SHAREHOLDER'S EQUITY	9,804	9,560
TOTAL LIABILITIES AND SHAREHOLDER'S EQUITY	$ 31,896	$ 30,461

Consolidated Balance Sheet (Parenthetical) (USD $) In Millions, unless otherwise specified	Sep. 30, 2010	Dec. 31, 2009
CONSOLIDATED EDISON INC [Member]
Accounts receivable-customers, allowance for uncollectible accounts	$ 72	$ 70
Other receivables, allowance for uncollectible accounts	8	5
Non-utility property, accumulated depreciation	50	45
Intangible assets, accumulated amortization	3	2
CECONY [Member]
Accounts receivable-customers, allowance for uncollectible accounts	65	63
Other receivables, allowance for uncollectible accounts	7	4
Non-utility property, accumulated depreciation	$ 21	$ 20

Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2010	Sep. 30, 2009
CONSOLIDATED EDISON INC [Member]
NET INCOME	$ 353	$ 339	$ 768	$ 675
OTHER COMPREHENSIVE INCOME/(LOSS), NET OF TAXES
Pension plan liability adjustments, net of taxes	1	2	5	5
Less: Reclassification adjustment for losses included in net income, net of taxes of $0 in 2010 and $1 and $1 in 2009, respectively		1		1
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAXES	1	1	5	4
COMPREHENSIVE INCOME	354	340	773	679
Preferred stock dividend requirements of subsidiary	(3)	(3)	(9)	(9)
COMPREHENSIVE INCOME FOR COMMON STOCK	351	337	764	670
CECONY [Member]
NET INCOME	335	285	717	623
OTHER COMPREHENSIVE INCOME/(LOSS), NET OF TAXES
Pension plan liability adjustments, net of taxes				1
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAXES				1
COMPREHENSIVE INCOME	335	285	717	624
Preferred stock dividend requirements of subsidiary	$ (3)	$ (3)	$ (8)	$ (8)

- Definition

The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes.

+ References+ Details

Consolidated Statement of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2010	Sep. 30, 2009
CONSOLIDATED EDISON INC [Member]
Pension plan liability adjustments, taxes	$ 1	$ 1	$ 4	$ 3
Less: Reclassification adjustment for losses included in net income, taxes	0	1	0	1
CECONY [Member]
Pension plan liability adjustments, taxes		$ 1		$ 1

Consolidated Statement of Common Shareholders' Equity (USD $)	Total	CONSOLIDATED EDISON INC [Member]	CONSOLIDATED EDISON INC [Member] Common Stock [Member]	CONSOLIDATED EDISON INC [Member] Additional Paid- In Capital [Member]	CONSOLIDATED EDISON INC [Member] Retained Earnings [Member]	CONSOLIDATED EDISON INC [Member] Treasury Stock [Member]	CONSOLIDATED EDISON INC [Member] Capital Stock Expense [Member]	CONSOLIDATED EDISON INC [Member] Accumulated Other Comprehensive Income/(Loss) [Member]	CECONY [Member]	CECONY [Member] Common Stock [Member]	CECONY [Member] Additional Paid- In Capital [Member]	CECONY [Member] Retained Earnings [Member]	CECONY [Member] Treasury Stock [Member]	CECONY [Member] Capital Stock Expense [Member]	CECONY [Member] Accumulated Other Comprehensive Income/(Loss) [Member]
BEGINNING BALANCE at Dec. 31, 2008		$ 9,698,000,000	$ 29,000,000	$ 4,112,000,000	$ 6,685,000,000	$ (1,001,000,000)	$ (60,000,000)	$ (67,000,000)	$ 8,991,000,000	$ 589,000,000	$ 3,664,000,000	$ 5,780,000,000	$ (962,000,000)	$ (60,000,000)	$ (20,000,000)
BEGINNING BALANCE (in shares) at Dec. 31, 2008			273,721,686			23,210,700				235,488,094
Net Income									200,000,000			200,000,000
Net income for common stock		180,000,000			180,000,000
Common stock dividend		(162,000,000)			(162,000,000)				(163,000,000)			(163,000,000)
Cumulative preferred dividends									(3,000,000)			(3,000,000)
Issuance of common shares-dividend reinvestment and employee stock plans (in shares)			532,533
Issuance of common shares-dividend reinvestment and employee stock plans		20,000,000		20,000,000
Other comprehensive income		1,000,000						1,000,000
ENDING BALANCE at Mar. 31, 2009		9,737,000,000	29,000,000	4,132,000,000	6,703,000,000	(1,001,000,000)	(60,000,000)	(66,000,000)	9,025,000,000	589,000,000	3,664,000,000	5,814,000,000	(962,000,000)	(60,000,000)	(20,000,000)
ENDING BALANCE (in shares) at Mar. 31, 2009			274,254,219			23,210,700				235,488,094
BEGINNING BALANCE at Dec. 31, 2008		9,698,000,000				(1,001,000,000)	(60,000,000)		8,991,000,000	589,000,000	3,664,000,000		(962,000,000)	(60,000,000)	(20,000,000)
BEGINNING BALANCE (in shares) at Dec. 31, 2008						23,210,700				235,488,094
Net Income		675,000,000							623,000,000
Net income for common stock	666,000,000	666,000,000							615,000,000
ENDING BALANCE at Sep. 30, 2009		9,943,000,000				(1,001,000,000)	(60,000,000)		9,118,000,000	589,000,000	3,664,000,000		(962,000,000)	(60,000,000)
ENDING BALANCE (in shares) at Sep. 30, 2009						23,210,700				235,488,094
BEGINNING BALANCE at Mar. 31, 2009		9,737,000,000	29,000,000	4,132,000,000	6,703,000,000	(1,001,000,000)	(60,000,000)	(66,000,000)	9,025,000,000	589,000,000	3,664,000,000	5,814,000,000	(962,000,000)	(60,000,000)	(20,000,000)
BEGINNING BALANCE (in shares) at Mar. 31, 2009			274,254,219			23,210,700				235,488,094
Net Income									139,000,000			139,000,000
Net income for common stock		150,000,000			150,000,000
Common stock dividend		(162,000,000)			(162,000,000)				(163,000,000)			(163,000,000)
Cumulative preferred dividends									(3)			(3)
Issuance of common shares-dividend reinvestment and employee stock plans (in shares)			584,916
Issuance of common shares-dividend reinvestment and employee stock plans		21,000,000		21,000,000
Other comprehensive income		2,000,000						2,000,000
ENDING BALANCE at Jun. 30, 2009		9,748,000,000	29,000,000	4,153,000,000	6,691,000,000	(1,001,000,000)	(60,000,000)	(64,000,000)	8,998,000,000	589,000,000	3,664,000,000	5,787,000,000	(962,000,000)	(60,000,000)	(20,000,000)
ENDING BALANCE (in shares) at Jun. 30, 2009			274,839,135			23,210,700				235,488,094
Net Income		339,000,000							285,000,000			285,000,000
Net income for common stock	336,000,000	336,000,000			336,000,000				282,000,000
Common stock dividend		(162,000,000)			(162,000,000)				(163,000,000)			(163,000,000)
Cumulative preferred dividends									(3,000,000)			(3,000,000)
Issuance of common shares-dividend reinvestment and employee stock plans (in shares)			520,041
Issuance of common shares-dividend reinvestment and employee stock plans		20,000,000		20,000,000
Other comprehensive income		1,000,000						1,000,000	1,000,000						1,000,000
ENDING BALANCE at Sep. 30, 2009		9,943,000,000	29,000,000	4,173,000,000	6,865,000,000	(1,001,000,000)	(60,000,000)	(63,000,000)	9,118,000,000	589,000,000	3,664,000,000	5,906,000,000	(962,000,000)	(60,000,000)	(19,000,000)
ENDING BALANCE (in shares) at Sep. 30, 2009			275,359,176			23,210,700				235,488,094
BEGINNING BALANCE at Dec. 31, 2009		10,249,000,000	30,000,000	4,420,000,000	6,904,000,000	(1,001,000,000)	(62,000,000)	(42,000,000)	9,347,000,000	589,000,000	3,877,000,000	5,909,000,000	(962,000,000)	(62,000,000)	(4,000,000)
BEGINNING BALANCE (in shares) at Dec. 31, 2009			281,123,741			23,210,700				235,488,094
Net Income									246,000,000			246,000,000
Net income for common stock		226,000,000			226,000,000
Capital contribution from parent									12,000,000		12,000,000
Common stock dividend		(167,000,000)			(167,000,000)				(167,000,000)			(167,000,000)
Cumulative preferred dividends									(3,000,000)			(3,000,000)
Issuance of common shares-dividend reinvestment and employee stock plans (in shares)			647,731
Issuance of common shares-dividend reinvestment and employee stock plans		28,000,000		28,000,000
Other comprehensive income		3,000,000						3,000,000
ENDING BALANCE at Mar. 31, 2010		10,339,000,000	30,000,000	4,448,000,000	6,963,000,000	(1,001,000,000)	(62,000,000)	(39,000,000)	9,435,000,000	589,000,000	3,889,000,000	5,985,000,000	(962,000,000)	(62,000,000)	(4,000,000)
ENDING BALANCE (in shares) at Mar. 31, 2010			281,771,472			23,210,700				235,488,094
BEGINNING BALANCE at Dec. 31, 2009		10,249,000,000				(1,001,000,000)	(62,000,000)		9,347,000,000	589,000,000			(962,000,000)	(62,000,000)	(4,000,000)
BEGINNING BALANCE (in shares) at Dec. 31, 2009						23,210,700				235,488,094
Net Income		768,000,000							717,000,000
Net income for common stock	759,000,000	759,000,000							709,000,000
ENDING BALANCE at Sep. 30, 2010		10,630,000,000				(1,001,000,000)	(62,000,000)		9,591,000,000	589,000,000			(962,000,000)	(62,000,000)	(4,000,000)
ENDING BALANCE (in shares) at Sep. 30, 2010						23,210,700				235,488,094
BEGINNING BALANCE at Mar. 31, 2010		10,339,000,000	30,000,000	4,448,000,000	6,963,000,000	(1,001,000,000)	(62,000,000)	(39,000,000)	9,435,000,000	589,000,000	3,889,000,000	5,985,000,000	(962,000,000)	(62,000,000)	(4,000,000)
BEGINNING BALANCE (in shares) at Mar. 31, 2010			281,771,472			23,210,700				235,488,094
Net Income									138,000,000			138,000,000
Net income for common stock		183,000,000			183,000,000
Capital contribution from parent									12,000,000		12,000,000
Common stock dividend		(168,000,000)			(168,000,000)				(168,000,000)			(168,000,000)
Cumulative preferred dividends									(3,000,000)			(3,000,000)
Issuance of common shares-dividend reinvestment and employee stock plans (in shares)			555,964
Issuance of common shares-dividend reinvestment and employee stock plans		25,000,000		25,000,000
Other comprehensive income		1,000,000						1,000,000
ENDING BALANCE at Jun. 30, 2010		10,380,000,000	30,000,000	4,473,000,000	6,978,000,000	(1,001,000,000)	(62,000,000)	(38,000,000)	9,414,000,000	589,000,000	3,901,000,000	5,952,000,000	(962,000,000)	(62,000,000)	(4,000,000)
ENDING BALANCE (in shares) at Jun. 30, 2010			282,327,436			23,210,700				235,488,094
Net Income		353,000,000							335,000,000			335,000,000
Net income for common stock	350,000,000	350,000,000			350,000,000				332,000,000
Capital contribution from parent									12,000,000		12,000,000
Common stock dividend		(168,000,000)			(168,000,000)				(167,000,000)			(167,000,000)
Cumulative preferred dividends									(3,000,000)			(3,000,000)
Issuance of common shares-dividend reinvestment and employee stock plans (in shares)			1,487,598
Issuance of common shares-dividend reinvestment and employee stock plans		67,000,000		1,000,000	66,000,000
Other comprehensive income		1,000,000						1,000,000
ENDING BALANCE at Sep. 30, 2010		$ 10,630,000,000	$ 31,000,000	$ 4,539,000,000	$ 7,160,000,000	$ (1,001,000,000)	$ (62,000,000)	$ (37,000,000)	$ 9,591,000,000	$ 589,000,000	$ 3,913,000,000	$ 6,117,000,000	$ (962,000,000)	$ (62,000,000)	$ (4,000,000)
ENDING BALANCE (in shares) at Sep. 30, 2010			283,815,034			23,210,700				235,488,094

General

9 Months Ended

Sep. 30, 2010

General

Notes to the Financial Statements

General

These combined notes accompany and form an integral part of the separate 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, which are presented separately in the CECONY consolidated financial statements, are also consolidated, along with those of Con Edison's other utility subsidiary, Orange and Rockland Utilities, Inc. (O&R), and Con Edison's competitive energy businesses (discussed below), in Con Edison's consolidated financial statements. 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 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 presentation 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, 2009 (the Form 10-K) and their separate unaudited financial statements (including the combined notes thereto) included in Part I, Item 1 of their combined Quarterly Reports on Form 10-Q for the quarterly periods ended March 31, 2010 (the First Quarter Form 10-Q) and June 30, 2010 (the Second Quarter Form 10-Q). Information in the notes to the consolidated financial statements in the Form 10-K, the First Quarter Form 10-Q and the Second Quarter Form 10-Q referred to in these notes is incorporated by reference herein. The use of terms such as "see" or "refer to" shall be deemed to incorporate by reference into these notes the information to which reference is made.

Certain prior year amounts have been reclassified to conform with the current year presentation. Consistent with current industry practice, the Companies are presenting income tax expense as one item on their consolidated income statements (instead of separate items in the operating income and other income sections of the consolidated income statements).

Con Edison has two regulated utility subsidiaries: CECONY and O&R. CECONY provides electric service and gas service in New York City and Westchester County. The company also provides steam service in parts of Manhattan. O&R, along with its regulated utility subsidiaries, provides electric service in southeastern New York and adjacent areas of northern New Jersey and eastern Pennsylvania and gas service in southeastern New York and adjacent areas of eastern Pennsylvania. Con Edison has the following competitive energy businesses: Consolidated Edison Solutions, Inc. (Con Edison Solutions), a retail energy services company that sells electricity and also offers energy-related services; Consolidated Edison Energy, Inc. (Con Edison Energy), a wholesale energy supply and services company; and Consolidated Edison Development, Inc. (Con Edison Development), a company that develops and participates in infrastructure projects.

Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2010

Summary of Significant Accounting Policies

Note A — Summary of Significant Accounting Policies

Earnings Per Common Share

Reference is made to "Earnings Per Common Share" in Note A to the financial statements included in Item 8 of the Form 10-K. For the three and nine months ended September 30, 2010 and 2009, Con Edison's basic and diluted EPS 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)*	2010		2009		2010		2009
Net income for common stock	$	350	$	336	$	759	$	666
Weighted average common shares outstanding – Basic		283.0		275.1		282.2		274.5
Add: Incremental shares attributable to effect of potentially dilutive securities		1.6		0.9		1.5		0.9
Adjusted weighted average common shares outstanding – Diluted		284.6		276.0		283.7		275.4
Net income for common stock per common share – basic	$	1.24	$	1.22	$	2.69	$	2.43
Net income for common stock per common share – diluted	$	1.23	$	1.22	$	2.68	$	2.42

Regulatory Matters

9 Months Ended

Sep. 30, 2010

Regulatory Matters

Note B — Regulatory Matters

Reference is made to "Accounting Policies" in Note A and "Rate Agreements" in Note B to the financial statements included in Item 8 of the Form 10-K and Note B to the financial statements in Part I, Item 1 of the First Quarter Form 10-Q and Second Quarter Form 10-Q.

Rate Agreements

CECONY — Gas

In September 2010, the NYSPSC issued an order approving the May 2010 Joint Proposal covering the rates CECONY can charge its customers for gas delivery service during the three-year period October 2010 through September 2013. Among other things, the Joint Proposal provides for gas base rate increases of $47.1 million, $47.9 million and $46.7 million, effective October 2010, 2011 and 2012, respectively. For additional information about the Joint Proposal, see "Rate Agreements" in Note B to the financial statements in Part I, Item 1 of the Second Quarter Form 10-Q.

CECONY — Steam

In September 2010, the NYSPSC issued an order approving the May 2010 Joint Proposal covering the rates CECONY can charge its customers for steam delivery service during the three-year period October 2010 through September 2013. Among other things, the Joint Proposal provides for steam base rate increases of $49.5 million, effective October 2010 and 2011, and $17.8 million, effective October 2012, with an additional $31.7 million to be collected through a surcharge in the rate year ending September 2013. The NYSPSC order requires CECONY, in its next steam rate case filing, to propose a phase-in over a period of not more than seven years of an increase in the allocation to steam customers of the fuel costs for the company's East River Repowering Project (ERRP, which cogenerates electricity and steam) that are above the market value of the electric energy generated by ERRP. For additional information about the Joint Proposal, see "Rate Agreements" in Note B to the financial statements in Part I, Item 1 of the Second Quarter Form 10-Q.

Other Regulatory Matters

In February 2009, the NYSPSC commenced a proceeding to examine the prudence of certain CECONY expenditures (see "Investigations of Vendor Payments" in Note H). Pursuant to NYSPSC orders, a portion of the company's revenues (effective April 2010, $249 million, $32 million and $6 million on an annual basis for electric, gas and steam service, respectively) is being collected subject to potential refund to customers. At September 30, 2010, the company had collected an estimated $464 million from customers subject to potential refund in connection with this proceeding. In October 2010, a NYSPSC consultant reported its $21 million provisional assessment, which the company has disputed, of potential overcharges for construction work. The potential overcharges related to transactions that involved certain employees who were arrested and a contractor that performed work for the company. The NYSPSC's consultant is expected to continue to review the company's expenditures. The company is unable to estimate the amount, if any, of any refund that may be required in connection with this proceeding and, accordingly, has not established a regulatory liability for a refund.

Regulatory Assets and Liabilities

Regulatory assets and liabilities at September 30, 2010 and December 31, 2009 were comprised of the following items:


	Con Edison				CECONY
*(Millions of Dollars)*	2010		2009		2010		2009
Regulatory assets
Unrecognized pension and other postretirement costs	$	4,001	$	4,472	$	3,819	$	4,259
Future federal income tax		1,411		1,316		1,337		1,249
Environmental remediation costs		421		388		333		329
Surcharge for New York State Assessment		185		138		171		126
Net electric deferrals		161		82		161		82
Pension and other postretirement benefits deferrals		158		101		106		49
Revenue taxes		139		119		135		116
Deferred derivative losses – long-term		125		106		85		75
Deferred storm costs		58		5		43		—
Property tax reconciliation		52		85		47		85
O&R transition bond charges		49		55		—		—
World Trade Center restoration costs		44		41		44		41
Workers' compensation		34		37		34		37
Other		143		158		135		142
Regulatory assets – long-term		6,981		7,103		6,450		6,590
Deferred derivative losses – current		268		141		218		104
Recoverable energy costs – current		8		31		—		—
Regulatory assets – current		276		172		218		104
Total Regulatory Assets	$	7,257	$	7,275	$	6,668	$	6,694
Regulatory liabilities
Allowance for cost of removal less salvage	$	405	$	371	$	334	$	303
Net unbilled revenue deferrals		126		91		126		91
Refundable energy costs		78		118		53		77
Revenue decoupling mechanism		55		—		55		—
New York State tax refund		29		—		29		—
Gain on sale of First Avenue properties		23		23		23		23
Gain on sale of 125th Street Property		12		—		12		—
Rate case amortizations		5		21		5		21
Electric rate case deferral		—		19		—		19
2005-2008 capital expenditure reserve		—		24		—		24
Other		198		162		173		145
Regulatory liabilities		931		829		810		703
Deferred derivative gains – current		—		9		—		8
Total Regulatory Liabilities	$	931	$	838	$	810	$	711

"Net electric deferrals" at September 30, 2010 represent the remaining unamortized balance of certain regulatory assets and liabilities of CECONY that were combined effective April 1, 2010 and are being amortized to income, in accordance with CECONY's April 2010 rate plan. At December 2009, "net electric deferrals" represented the remaining unamortized balance of certain regulatory assets and liabilities of CECONY that were combined effective April 1, 2005 and were amortized to income in accordance with CECONY's April 2009 rate plan through March 2010.

Capitalization

9 Months Ended

Sep. 30, 2010

Capitalization

Note C — Capitalization

Reference is made to Note C to the financial statements in Item 8 of the Form 10-K and Note C to the financial statements in Part I, Item 1 of the First Quarter Form 10-Q and Second Quarter Form 10-Q.

In August 2010, O&R issued $55 million aggregate principal amount of 2.50 percent debentures, Series 2010 A, due 2015 and $115 million aggregate principal amount of 5.50 percent debentures, Series 2010 B, due 2040. In addition, O&R purchased, and had cancelled, its $55 million aggregate principal amount of Series 1994 A variable-rate, tax-exempt debt due 2014.

In October 2010, Con Edison issued 6.3 million common shares resulting in net proceeds of $305 million, the proceeds of which were invested by Con Edison in CECONY.

Short-Term Borrowing

9 Months Ended

Sep. 30, 2010

Short-Term Borrowing

Note D — Short-Term Borrowing

Reference is made to Note D to the financial statements in Item 8 of the Form 10-K and Note D to the financial statements in Part I, Item 1 of the First Quarter Form 10-Q and Second Quarter Form 10-Q.

At September 30, 2010, Con Edison had $846 million of commercial paper outstanding, $832 million of which was outstanding under CECONY's program. The weighted average interest rate was 0.4 percent for each of Con Edison and CECONY. At December 31, 2009, Con Edison and CECONY had no commercial paper outstanding. At September 30, 2010 and December 31, 2009, no loans were outstanding under the Companies' Credit Agreement and $220 million (including $151 million for CECONY) and $193 million (including $135 million for CECONY) of letters of credit were outstanding under the Credit Agreement, respectively.

Pension Benefits

9 Months Ended

Sep. 30, 2010

Pension Benefits

Note E — Pension Benefits

Reference is made to Note E to the financial statements in Item 8 of the Form 10-K and Note E to the financial statement in Part I, Item 1 of the First Quarter Form 10-Q and Second Quarter Form 10-Q.

Net Periodic Benefit Cost

The components of the Companies' net periodic benefit costs for the three and nine months ended September 30, 2010 and 2009 were as follows:


	For the Three Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2010			2009			2010			2009
Service cost – including administrative expenses	$	42		$	40		$	39		$	37
Interest cost on projected benefit obligation		139			131			130			123
Expected return on plan assets		(175	)		(173	)		(167	)		(165	)
Amortization of net actuarial loss		106			75			100			68
Amortization of prior service costs		2			2			2			2
NET PERIODIC BENEFIT COST	$	114		$	75		$	104		$	65
Amortization of regulatory asset*		—			1			—			1
TOTAL PERIODIC BENEFIT COST	$	114		$	76		$	104		$	66
Cost capitalized		(40	)		(28	)		(36	)		(25	)
Cost deferred		(29	)		(4	)		(29	)		(3	)
Cost charged to operating expenses	$	45		$	44		$	39		$	38

*	Relates to increases in CECONY's pension obligations of $45 million from a 1999 special retirement program.


	For the Nine Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2010			2009			2010			2009
Service cost – including administrative expenses	$	126		$	120		$	117		$	111
Interest cost on projected benefit obligation		417			393			390			369
Expected return on plan assets		(527	)		(519	)		(501	)		(495	)
Amortization of net actuarial loss		318			225			300			204
Amortization of prior service costs		6			6			6			6
NET PERIODIC BENEFIT COST	$	340		$	225		$	312		$	195
Amortization of regulatory asset*		1			3			1			3
TOTAL PERIODIC BENEFIT COST	$	341		$	228		$	313		$	198
Cost capitalized		(118	)		(82	)		(109	)		(75	)
Cost deferred		(85	)		(40	)		(82	)		(34	)
Cost charged to operating expenses	$	138		$	106		$	122		$	89

*	Relates to increases in CECONY's pension obligations of $33 million from a 1993 special retirement program (which was fully amortized in March 2009) and $45 million from a 1999 special retirement program.

Expected Contributions

Based on estimates as of December 31, 2009, the Companies are not required under funding regulations and laws to make any contributions to the pension plan during 2010. The Companies' policy is to fund their accounting cost to the extent tax deductible. During the first nine months of 2010, the Companies contributed $434 million to the pension plan (of which $397 million was contributed by CECONY). During the first nine months of 2009, the Companies contributed $282 million to the pension plan (of which $244 million was contributed by CECONY). During the second quarter of 2010, the Companies funded $25 million for the non-qualified supplemental pension plans. The Companies are continuing to monitor changes to funding and tax laws that may impact future pension plan funding requirements.

Other Postretirement Benefits

9 Months Ended

Sep. 30, 2010

Other Postretirement Benefits

Note F — Other Postretirement Benefits

Reference is made to Note F to the financial statements in Item 8 of the Form 10-K and Note F to the financial statements in Part I, Item 1 of the First Quarter Form 10-Q and Second Quarter Form 10-Q.

Net Periodic Benefit Cost

The components of the Companies' net periodic postretirement benefit costs for the three and nine months ended September 30, 2010 and 2009 were as follows:


	For the Three Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2010			2009			2010			2009
Service cost	$	6		$	5		$	5		$	4
Interest cost on accumulated other postretirement benefit obligation		23			24			20			21
Expected return on plan assets		(22	)		(21	)		(19	)		(20	)
Amortization of net actuarial loss		23			18			21			16
Amortization of prior service cost		(3	)		(3	)		(4	)		(3	)
Amortization of transition obligation		1			1			1			1
NET PERIODIC POSTRETIREMENT BENEFIT COST	$	28		$	24		$	24		$	19
Cost capitalized		(10	)		(9	)		(8	)		(7	)
Cost deferred		2			1			1			—
Cost charged to operating expenses	$	20		$	16		$	17		$	12


	For the Nine Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2010			2009			2010			2009
Service cost	$	18		$	15		$	15		$	12
Interest cost on accumulated other postretirement benefit obligation		69			72			60			63
Expected return on plan assets		(66	)		(63	)		(57	)		(60	)
Amortization of net actuarial loss		69			54			63			48
Amortization of prior service cost		(9	)		(9	)		(12	)		(9	)
Amortization of transition obligation		3			3			3			3
NET PERIODIC POSTRETIREMENT BENEFIT COST	$	84		$	72		$	72		$	57
Cost capitalized		(30	)		(27	)		(25	)		(22	)
Cost deferred		2			—			(1	)		(2	)
Cost charged to operating expenses	$	56		$	45		$	46		$	33

Environmental Matters

9 Months Ended

Sep. 30, 2010

Environmental Matters

Note G — 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 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 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 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, 2010 and December 31, 2009 were as follows:


	Con Edison				CECONY
*(Millions of Dollars)*	2010		2009		2010		2009
Accrued Liabilities:
Manufactured gas plant sites	$	193	$	164	$	109	$	112
Other Superfund Sites		46		48		45		47
Total	$	239	$	212	$	154	$	159
Regulatory assets	$	421	$	388	$	333	$	329

Most of the accrued Superfund Site liability relates to sites that have been investigated, in whole or in part. However, for many 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 will be accrued, the amount of which is not presently determinable but may be material. Under their current rate agreements, the Utilities are permitted to recover or defer as regulatory assets (for subsequent recovery through rates) certain site investigation and remediation costs.

Environmental remediation costs incurred and insurance recoveries received related to Superfund Sites during the three and nine months ended September 30, 2010 and 2009 were as follows:


	For the Three Months Ended September 30,
	Con Edison				CECONY
*(Millions of Dollars)*	2010		2009		2010		2009
Remediation costs incurred	$	9	$	20	$	8	$	20
Insurance recoveries received	$	—	$	3	$	—	$	3


	For the Nine Months Ended September 30,
	Con Edison				CECONY
*(Millions of Dollars)*	2010		2009		2010		2009
Remediation costs incurred	$	32	$	60	$	30	$	59
Insurance recoveries received	$	—	$	3	$	—	$	3

In 2006, CECONY estimated that for its manufactured gas plant sites, its aggregate undiscounted potential liability for the investigation and remediation of coal tar and/or other manufactured gas plant-related environmental contaminants could range up to $1.1 billion. In 2007, O&R estimated that for its manufactured gas plant sites, each of which has been investigated, the aggregate undiscounted potential liability for the remediation of such contaminants could range up to $115 million. These estimates were based on the assumption that there is contamination at the sites that have not yet been investigated and additional assumptions about these and the other sites regarding the extent of contamination and the type and extent of 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, which 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. In 2008, CECONY estimated that its aggregate undiscounted potential liability for these suits and additional suits that may be brought over the next 15 years is $9 million. The estimate was based upon a combination of modeling, historical data analysis and risk factor assessment. Actual experience may be materially different. In addition, certain current and former employees have claimed or are claiming workers' compensation benefits based on alleged disability from exposure to asbestos. Under its current rate agreements, 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 for the Companies at September 30, 2010 and December 31, 2009 were as follows:


	Con Edison				CECONY
*(Millions of Dollars)*	2010		2009		2010		2009
Accrued liability – asbestos suits	$	10	$	10	$	9	$	9
Regulatory assets – asbestos suits	$	10	$	10	$	9	$	9
Accrued liability – workers' compensation	$	109	$	113	$	104	$	108
Regulatory assets – workers' compensation	$	34	$	37	$	34	$	37

Other Material Contingencies

9 Months Ended

Sep. 30, 2010

Other Material Contingencies

Note H – Other Material Contingencies

Manhattan Steam Main Rupture

In July 2007, a CECONY steam main located in midtown Manhattan ruptured. It has been reported that one person died and others were injured as a result of the incident. Several buildings in the area were damaged. Debris from the incident included dirt and mud containing asbestos. The response to the incident required the closing of several buildings and streets for various periods. Approximately 100 suits are pending against the company seeking generally unspecified compensatory and, in some cases, punitive damages, for personal injury, property damage and business interruption. The company has not accrued a liability for the suits. The company has notified its insurers of the incident and believes that the policies in force at the time of the incident will cover most of the company's costs, which the company is unable to estimate, but which could be substantial, to satisfy its liability to others in connection with the incident.

Investigations of Vendor Payments

In January 2009, CECONY commenced an internal investigation relating to the arrests of certain employees and retired employees (all of whom have since pleaded guilty) for accepting kickbacks from contractors that performed construction work for the company. The company has retained a law firm, which has retained an accounting firm, to assist in the company's investigation. The company is providing information to governmental authorities, which consider the company to be a victim of unlawful conduct, in connection with their investigation of the arrested employees and contractors. The company has terminated its employment of the arrested employees and its contracts with the contractors (one of which is suing the company for substantial damages claiming wrongful termination). In February 2009, the NYSPSC commenced a proceeding that, among other things, will examine the prudence of certain of the company's expenditures relating to the arrests and consider whether additional expenditures should also be examined (see "Other Regulatory Matters" in Note B).

In September 2010, CECONY commenced an internal investigation relating to the arrest of a retired employee for participating in a bribery scheme in which the employee received payments from a bidder that was selected to supply materials to the company. CECONY has provided information to governmental authorities in connection with their ongoing investigation of this conspiracy to defraud the company.

The company, based upon its evaluation of its internal controls for 2009 and previous years, believes that the controls were effective to provide reasonable assurance that its financial statements have been fairly presented, in all material respects, in conformity with generally accepted accounting principles. Because the company's investigations are ongoing, the company is unable to predict the impact of any of the employees' unlawful conduct on the company's internal controls, business, results of operations or financial position.

Permit Non-Compliance and Pollution Discharges

In March 2009, the New York State Department of Environmental Conservation (NYSDEC) issued a proposed administrative Order on Consent to CECONY with respect to non-compliance with certain laws, regulations and permit conditions and discharges of pollutants at the company's steam generating facilities. The proposed order effectively instituted a civil enforcement proceeding against the company. In the proposed order, the NYSDEC is seeking, among other things, the company's agreement to pay a penalty in an amount the NYSDEC did not specify, retain an independent consultant to conduct a comprehensive audit of the company's generating facilities to determine compliance with federal and New York State environmental laws and regulations and recommend best practices, remove all equipment containing polychlorinated biphenyls from the company's steam and electric facilities, remediate polychlorinated biphenyl contamination, install certain wastewater treatment facilities, and comply with additional sampling, monitoring, and training requirements. In March 2010, the NYSDEC issued a revised proposed consent order specifying the amount of penalty the NYSDEC is seeking at $10.8 million. The company will seek to resolve this matter through negotiations with the NYSDEC. It is unable to predict the impact of this matter on the company's operations or the additional costs, which could be substantial, to comply with the requirements resulting from this matter.

In January 2010, the NYSDEC issued a proposed administrative Order on Consent to CECONY relating to discharges of pollutants, reported by the company to the NYSDEC from 2002 through 2009, into the storm sewer system at a property the company owns in the Astoria section of New York on which the company is permitted by the NYSDEC to operate a hazardous waste storage facility. In April 2010, the NYSDEC issued an order, to which CECONY consented, pursuant to which CECONY paid a $1.1 million penalty and is undertaking a corrective action plan that will require the company to incur an estimated $32 million of capital expenditures.

In June 2010, the NYSDEC issued a proposed consent order relating to the release of oil into the Bronx River resulting from a November 2009 transformer fire at the company's Dunwoodie electric substation. In July 2010, the NYSDEC issued an order, to which CECONY consented, pursuant to which CECONY paid a penalty and other amounts totaling $0.7 million.

Lease In/Lease Out Transactions

In each of 1997 and 1999, Con Edison Development entered into a transaction in which it leased property and then immediately subleased it back to the lessor (termed "Lease In/Lease Out," or LILO transactions). The transactions respectively involve electric generating and gas distribution facilities in the Netherlands, with a total investment of $259 million. The transactions were financed with $93 million of equity and $166 million of non-recourse, long-term debt secured by the underlying assets. In accordance with the accounting rules for leases, Con Edison is accounting for the two LILO transactions as leveraged leases. Accordingly, the company's investment in these leases, net of non-recourse debt, is carried as a single amount in Con Edison's consolidated balance sheet and income is recognized pursuant to a method that incorporates a level rate of return for those years when net investment in the lease is positive, based upon the after-tax cash flows projected at the inception of the leveraged leases. The company's investment in these leveraged leases was $(36) million at September 30, 2010 and $(24) million at December 31, 2009 and is comprised of a $235 million gross investment less $271 million deferred tax liabilities at September 30, 2010 and $235 million gross investment less $259 million of deferred tax liabilities at December 31, 2009.

On audit of Con Edison's tax return for 1997, the IRS disallowed the tax losses in connection with the 1997 LILO transaction. In December 2005, Con Edison paid a $0.3 million income tax deficiency asserted by the IRS for the tax year 1997 with respect to the 1997 LILO transaction. In April 2006, the company paid interest of $0.2 million associated with the deficiency and commenced an action in the United States Court of Federal Claims, entitled Consolidated Edison Company of New York, Inc. v. United States, to obtain a refund of this tax payment and interest. A trial was completed in November 2007. In October 2009, the court issued a decision in favor of the company concluding that the 1997 LILO transaction was, in substance, a true lease that possessed economic substance, the loans relating to the lease constituted bona fide indebtedness, and the deductions for the 1997 LILO transactions claimed by the company in its 1997 federal income tax return are allowable. The IRS is entitled to appeal the decision.

In connection with its audit of Con Edison's federal income tax returns for 1998 through 2007, the IRS disallowed $416 million of net tax deductions taken with respect to both of the LILO transactions for the tax years. Con Edison is pursuing administrative appeals of these audit level disallowances. In connection with its audit of Con Edison's federal income tax returns for 2009 and 2008, the IRS has disallowed $41 million and $42 million, respectively, of net tax deductions taken with respect to both of the LILO transactions. When these audit level disallowances become appealable, Con Edison intends to file an appeal of the disallowances.

Con Edison believes that its LILO transactions have been correctly reported, and has not recorded any reserve with respect to the disallowance of tax losses, or related interest, in connection with its LILO transactions. Con Edison's estimated tax savings, reflected in its financial statements, from the two LILO transactions through September 30, 2010, in the aggregate, was $217 million. If Con Edison were required to repay all or a portion of these amounts, it would also be required to pay interest of up to $73 million net of tax at September 30, 2010.

Pursuant to the accounting rules for leveraged lease transactions, the expected timing of income tax cash flows generated by Con Edison's LILO transactions are required to be reviewed at least annually. If the expected timing of the cash flows is revised, the rate of return and the allocation of income would be recalculated from the inception of the LILO transactions, and the company would be required to recalculate the accounting effect of the LILO transactions, which would result in a charge to earnings that could have a material adverse effect on the company's results of operations.

Guarantees

Con Edison and its subsidiaries enter into various agreements providing financial or performance assurance primarily to third parties on behalf of their subsidiaries. Maximum amounts guaranteed by Con Edison totaled $873 million and $929 million at September 30, 2010 and December 31, 2009, respectively.

A summary, by type (described in Note H to the financial statements in Item 8 of the Form 10-K) and term, of Con Edison's total guarantees at September 30, 2010 is as follows:


Guarantee Type	0 – 3 years		4 –10 years		> 10 years		Total
	*(Millions of Dollars)*
Commodity transactions	$	618	$	9	$	128	$	755
Affordable housing program		4		—		—		4
Intra-company guarantees		30		—		1		31
Other guarantees		63		20		—		83
TOTAL	$	715	$	29	$	129	$	873

Income Tax

9 Months Ended

Sep. 30, 2010

Income Tax

Note I Income Tax

Reference is made to Note L to the financial statements in Item 8 of the Form 10-K.

In August 2010, the IRS entered into a closing agreement with Con Edison, covering the Companies' use of certain methods to determine the extent to which construction-related costs could be deducted in 2005 through 2008 (the last year for which deduction of construction-related costs was an uncertain tax position), and instructed the IRS to apply the remainder of a June 2007 deposit to pay the tax for 2005 through 2008 determined to be due relating to the closing agreement. At September 30, 2010, the remaining deposit was $51 million (including $47 million attributable to CECONY), which is included in other current assets in the Companies' consolidated balance sheets, and the tax due relating to the closing agreement was $53 million (including $55 million attributable to CECONY), which is included in other current liabilities in the Companies' consolidated balance sheets. In October 2010, the IRS indicated that it applied most of the remaining deposit towards payment of the tax due relating to the closing agreement.

At September 30, 2010, the liability for uncertain tax positions (which is included in other current liabilities in the Companies' consolidated balance sheets) included $8 million (including $8 million attributable to CECONY) relating to the deduction of construction-related costs for New York State income tax purposes in 2005 through 2008.

Settlement of the Companies' uncertain tax position regarding the timing of the deduction of construction-related costs has had, and will have, no effect (except for interest on amounts owed, which is not expected to be significant) on the Companies' results of operations because deferred taxes had previously been provided for the related temporary differences between the deductions taken for income tax purposes and the corresponding amounts charged to expense for financial reporting purposes.

In September 2010, Con Edison filed the Companies' federal income tax return for 2009 reflecting, among other things, the deduction of the costs of certain repairs to utility plant as an operating expense (the "repair allowance deductions"). Previously, the Companies capitalized such costs and reported their depreciation in their tax returns. Taking the repair allowance deductions accelerated the timing of the deduction of the cost of the repairs. The Companies had a net operating loss for federal income tax purposes in 2009 reflecting, among other things, the repair allowance deductions and the bonus depreciation provisions of the American Recovery and Reinvestment Act of 2009. At September 30, 2010, with respect to the repair allowance deductions, Con Edison accrued a liability for uncertain tax positions of $54 million (including $52 million attributable to CECONY), which is included in other current liabilities in the Companies' consolidated balance sheets.

In September 2010, the Companies applied for a refund of certain prior years' federal tax payments based upon the carry-back of the 2009 net operating loss. At September 30, 2010, Con Edison's estimated refunds receivable from the IRS amounted to $297 million, which is included in other accounts receivable in Con Edison's consolidated balance sheet (including $281 million attributable to CECONY, which is included in accounts receivable from affiliated companies in CECONY's consolidated balance sheet).

The Companies also estimate that they had a net operating loss for state income tax purposes for 2009 (reflecting, among other things, the repair allowance expense deductions), which is being carried forward and as to which, at September 30, 2010, Con Edison has included a $64 million other current asset in its consolidated balance sheet (including $35 million attributable to CECONY, which is included in accounts receivable from affiliated companies in CECONY's consolidated balance sheet).

Financial Information by Business Segment

9 Months Ended

Sep. 30, 2010

Financial Information by Business Segment

Note J — Financial Information by Business Segment

Reference is made to Note N to the financial statements in Item 8 of the Form 10-K.

The financial data for the business segments are as follows:


	For the Three Months Ended September 30,
	Operating revenues						Inter-segment revenues						Depreciation and amortization				Operating income
*(Millions of Dollars)*	2010			2009			2010			2009			2010		2009		2010			2009
Con Edison of New York
Electric	$	2,570		$	2,395		$	3		$	3		$	156	$	149	$	715		$	641
Gas		204			183			1			1			26		24		(16	)		(28	)
Steam		91			77			18			18			16		15		(33	)		(34	)
Consolidation adjustments		—			—			(22	)		(22	)		—		—		—			—
Total Con Edison of New York	$	2,865		$	2,655		$	—		$	—		$	198	$	188	$	666		$	579
O&R
Electric	$	245		$	209		$	—		$	—		$	8	$	7	$	52		$	40
Gas		25			26			—			—			3		3		(4	)		(5	)
Total O&R	$	270		$	235		$	—		$	—		$	11	$	10	$	48		$	35
Competitive energy businesses	$	584		$	610		$	—		$	2		$	2	$	2	$	(8	)	$	70
Other*		(12	)		(11	)		—			(2	)		—		—		(1	)		1
Total Con Edison	$	3,707		$	3,489		$	—		$	—		$	211	$	200	$	705		$	685

*	Parent company expenses, primarily interest, and consolidation adjustments. Other does not represent a business segment.


	For the Nine Months Ended September 30,
	Operating revenues						Inter-segment revenues						Depreciation and amortization				Operating Income
*(Millions of Dollars)*	2010			2009			2010			2009			2010		2009		2010			2009
Con Edison of New York
Electric	$	6,402		$	5,865		$	9		$	9		$	464	$	437	$	1,228		$	1,090
Gas		1,126			1,259			4			4			76		73		243			223
Steam		487			521			55			54			46		44		41			40
Consolidation adjustments		—			—			(68	)		(67	)		—		—		—			—
Total Con Edison of New York	$	8,015		$	7,645		$	—		$	—		$	586	$	554	$	1,512		$	1,353
O&R
Electric	$	559		$	499		$	—		$	—		$	24	$	22	$	71		$	57
Gas		150			171			—			—			9		9		20			16
Total O&R	$	709		$	670		$	—		$	—		$	33	$	31	$	91		$	73
Competitive energy businesses	$	1,491		$	1,477		$	—		$	(1	)	$	6	$	4	$	25		$	52
Other*		(30	)		(34	)		—			1			—		—		(1	)		(2	)
Total Con Edison	$	10,185		$	9,758		$	—		$	—		$	626	$	589	$	1,627		$	1,476

*	Parent company expenses, primarily interest, and consolidation adjustments. Other does not represent a business segment.

Derivative Instruments and Hedging Activities

9 Months Ended

Sep. 30, 2010

Derivative Instruments and Hedging Activities

Note K — Derivative Instruments and Hedging Activities

Under the accounting rules for derivatives and hedging, derivatives are recognized on the balance sheet at fair value, unless an exception is available under the accounting rules. Certain qualifying derivative contracts have been designated as normal purchases or normal sales contracts. These contracts are not reported at fair value under the accounting rules.

Energy Price Hedging

Con Edison's subsidiaries hedge market price fluctuations associated with physical purchases and sales of electricity, natural gas, and steam by using derivative instruments including futures, forwards, basis swaps, options, transmission congestion contracts and financial transmission rights contracts. The fair values of these hedges at September 30, 2010 and December 31, 2009 were as follows:


	Con Edison						CECONY
*(Millions of Dollars)*	2010			2009			2010			2009
Fair value of net derivative (liabilities) – gross	$	(436	)	$	(266	)	$	(248	)	$	(137	)
Impact of netting of cash collateral		282			162			143			87
Fair value of net derivative (liabilities) – net	$	(154	)	$	(104	)	$	(105	)	$	(50	)

Credit Exposure

The Companies are exposed to credit risk related to transactions entered into primarily for the various energy supply and hedging activities by the Utilities and the competitive energy businesses. 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.

At September 30, 2010, Con Edison and CECONY had $172 million and $24 million of credit exposure in connection with energy supply and hedging activities, net of collateral, respectively. Con Edison's net credit exposure consisted of $107 million with investment-grade counterparties, and $65 million primarily with commodity exchange brokers or independent system operators. CECONY's entire net credit exposure was with commodity exchange brokers.

Economic Hedges

The Companies enter into certain derivative instruments that do not qualify or are not designated as hedges under the accounting rules for derivatives and hedging. However, management believes these instruments represent economic hedges that mitigate exposure to fluctuations in commodity prices.

The fair values of the Companies' commodity derivatives at September 30, 2010 were:


*(Millions of Dollars)*	Fair Value of Commodity Derivatives(a) Balance Sheet Location	Con Edison			CECONY
Asset Derivatives
Current	Other current assets	$	234		$	18
Long term	Other deferred charges and non-current assets		67			12
Total asset derivatives		$	301		$	30
Impact of netting			(181	)		6
Net asset derivatives		$	120		$	36
Liability Derivatives
Current	Fair value of derivative liabilities	$	538		$	—
Current	Other current liabilities		—			192
Long term	Fair value of derivative liabilities		199			86
Total liability derivatives		$	737		$	278
Impact of netting			(463	)		(137	)
Net liability derivatives		$	274		$	141

(a)	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.

The fair value of the Companies' commodity derivatives at December 31, 2009 were:


*(Millions of Dollars)*	Fair Value of Commodity Derivatives(a) Balance Sheet Location	Con Edison			CECONY
Asset Derivatives
Current	Fair value of derivative assets	$	213		$	40
Long term	Other deferred charges and non-current assets		148			19
Total asset derivatives		$	361		$	59
Impact of netting			(231	)		(20	)
Net asset derivatives		$	130		$	39
Liability Derivatives
Current	Fair value of derivative liabilities	$	401		$	110
Long term	Fair value of derivative liabilities		226			86
Total liability derivatives		$	627		$	196
Impact of netting			(393	)		(107	)
Net liability derivatives		$	234		$	89

(a)	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.

The Utilities generally recover all of 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 commissions. See "Recoverable Energy Costs" in Note A to the financial statements in Item 8 of the Form 10-K. In accordance with the accounting rules for regulated operations, the Utilities record a regulatory asset or 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. Con Edison's competitive energy businesses record realized and unrealized gains and losses on their derivative contracts in earnings in the reporting period in which they occur.

The following table presents the changes in the fair values of commodity derivatives that have been deferred or recognized in earnings for the three and nine months ended September 30, 2010:


Realized and Unrealized Gains/(Losses) on Commodity Derivatives(a) Deferred or Recognized in Income for the Three Months Ended September 30, 2010
*(Millions of Dollars)*	Balance Sheet Location	Con Edison			CECONY
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations:
Current	Other current liabilities	$	(3	)	$	(3	)
Total deferred losses		$	(3	)	$	(3	)
Current	Other current assets	$	(61	)	$	(54	)
Current	Recoverable energy costs		(70	)		(63	)
Long term	Regulatory assets		4			7
Total deferred losses		$	(127	)	$	(110	)
Net deferred losses		$	(130	)	$	(113	)
	Income Statement Location
Pre-tax gain/(loss) recognized in income
	Purchased power expense	$	(26	)(b)	$	—
	Gas purchased for resale		(1	)		—
	Non-utility revenue		4	(b)		—
Total pre-tax gain/(loss) recognized in income		$	(23	)	$	—

(a)	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.

(b)	For the three months ended September 30, 2010, Con Edison recorded in non-utility operating revenues and purchased power expense an unrealized pre-tax gain/(loss) of $(3)million and $(34) million, respectively.


Realized and Unrealized Gains/(Losses) on Commodity Derivatives(a) Deferred or Recognized in Income for the Nine Months Ended September 30, 2010
*(Millions of Dollars)*	Balance Sheet Location	Con Edison			CECONY
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations:
Current	Other current liabilities	$	(8	)	$	(8	)
Total deferred losses		$	(8	)	$	(8	)
Current	Other current assets	$	(127	)	$	(114	)
Current	Recoverable energy costs	$	(205	)	$	(172	)
Long term	Regulatory assets	$	(19	)	$	(11	)
Total deferred losses		$	(351	)	$	(297	)
Net deferred losses		$	(359	)	$	(305	)
	Income Statement Location
Pre-tax gain/(loss) recognized in income
	Purchased power expense	$	(132	)	$	—
	Gas purchased for resale		(7	)		—
	Non-utility revenue		21	(b)		—
Total pre-tax gain/(loss) recognized in income		$	(118	)	$	—

(a)	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.

(b)	For the nine months ended September 30, 2010, Con Edison recorded in non-utility operating revenues and purchased power expense an unrealized pre-tax gain/(loss) of $(1) million and $(34) million, respectively.

The following table presents the changes in the fair values of commodity derivatives that have been deferred or recognized in earnings for the three and nine months ended September 30, 2009:


Realized and Unrealized Gains/(Losses) on Commodity Derivatives(a) Deferred or Recognized in Income for the Three Months Ended September 30, 2009
*(Millions of Dollars)*	Balance Sheet Location	Con Edison			Con Edison of New York
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations:
Current	Deferred derivative gains	$	4		$	4
Long term	Regulatory liabilities		2			—
Total deferred gains		$	6		$	4
Current	Deferred derivative losses	$	111		$	97
Current	Recoverable energy costs	$	(158	)	$	(134	)
Long term	Regulatory assets	$	29		$	21
Total deferred losses		$	(18	)	$	(16	)
Net deferred losses		$	(12	)	$	(12	)
	Income Statement Location
Pre-tax gain/(loss) recognized in income
	Purchased power expense	$	(176	)	$	—
	Gas purchased for resale		(9	)		—
	Non-utility revenue		27	(b)		—
Total pre-tax gain/(loss) recognized in income		$	(158	)	$	—

(a)	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.

(b)	For the three months ended September 30, 2009, Con Edison recorded in non-utility operating revenues an unrealized pre-tax gain of $28 million.


Realized and Unrealized Gains/(Losses) on Commodity Derivatives(a) Deferred or Recognized in Income for the Nine Months Ended September 30, 2009
*(Millions of Dollars)*	Balance Sheet Location	Con Edison			Con Edison of New York
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations:
Current	Deferred derivative gains	$	(9	)	$	(9	)
Long term	Regulatory liabilities		3			—
Total deferred gains		$	(6	)	$	(9	)
Current	Deferred derivative losses	$	136		$	136
Current	Recoverable energy costs	$	(462	)	$	(394	)
Long term	Regulatory assets	$	8		$	4
Total deferred losses		$	(318	)	$	(254	)
Net deferred losses		$	(324	)	$	(263	)
	Income Statement Location
Pre-tax gain/(loss) recognized in income
	Purchased power expense	$	(432	)	$	—
	Gas purchased for resale		(7	)		—
	Non-utility revenue		(5	)(b)		—
Total pre-tax gain/(loss) recognized in income		$	(444	)	$	—

(a)	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.

(b)	For the nine months ended September 30, 2009, Con Edison recorded in non-utility operating revenues an unrealized pre-tax gain of $2 million.

As of September 30, 2010, Con Edison had 1,475 contracts, including 693 CECONY contracts, which were considered to be derivatives under the accounting rules for derivatives and hedging (excluding qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts). The following table presents the number of contracts by commodity type:


	Electric Derivatives								Gas Derivatives
	Number of Energy Contracts(a)		MWhs(b)		Number of Capacity Contracts(a)		MWs(b)		Number of Contracts(a)		Dths(b)		Total Number of Contracts(a)
Con Edison		690		18,268,063		63		9,075		722		141,570,000		1,475
CECONY		137		3,738,600		—		—		556		131,790,000		693

(a)	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.

(b)	Volumes are reported net of long and short positions.

The Companies also enter into electric congestion and gas basis swap contracts to hedge the congestion and transportation charges which are associated with electric and gas contracts and hedged volumes.

The collateral requirements associated with, and settlement of, derivative transactions are included in net cash flows from operating activities in the Companies' consolidated statement of cash flows. Most derivative instrument contracts contain provisions that may require the Companies to provide collateral on derivative instruments in net liability positions. The amount of collateral to be provided will depend on the fair value of the derivative instruments and the Companies' credit ratings.

The aggregate fair value of all derivative instruments with credit-risk-related contingent features that are in a net liability position and collateral posted at September 30, 2010, 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 were:


*(Millions of Dollars)*	Con Edison(a)			CECONY(a)
Aggregate fair value – net liabilities	$	443		$	180
Collateral posted	$	240		$	92	(b)
Additional collateral(c) (downgrade one level from current ratings(d))	$	53		$	35
Additional collateral(c) (downgrade to below investment grade from current ratings(d))	$	324	(e)	$	103

(a)

Non-derivative transactions for the purchase and sale of electricity and gas and qualifying derivative instruments, which 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 and Con Edison's competitive energy businesses were no longer extended unsecured credit for such purchases, the Companies would be required to post collateral, which at September 30, 2010, would have amounted to an estimated $191 million for Con Edison, including $50 million for CECONY. 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)	Across the Utilities' energy derivative positions, credit limits for the same counterparties are generally integrated. At September 30, 2010, the Utilities posted combined collateral of $126 million, including an estimated $34 million attributable to O&R.

(c)

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 liabilities 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 of setoff.

(d)

The current ratings are Moody's, S&P and Fitch long-term credit rating of, as applicable, Con Edison (Baa1/BBB+/BBB+), CECONY (A3/A-/A-) or O&R (Baa1/A-/A-). Credit ratings assigned by rating agencies are expressions of opinions that are subject to revision or withdrawal at any time by the assigning rating agency.

(e)	Derivative instruments that are net assets have been excluded from the table. At September 30, 2010, if Con Edison had been downgraded to below investment grade, it would have been required to post additional collateral for such derivative instruments of not more than $20 million.

Interest Rate Swaps

O&R has an interest rate swap related to its Series 1994A Debt (which debt was cancelled in August 2010, see Note C). O&R pays a fixed-rate of 6.09 percent and receives a LIBOR-based variable rate. The fair value of this interest rate swap at September 30, 2010 was an unrealized loss of $12 million, which has been included in Con Edison's consolidated balance sheet as a noncurrent liability/fair value of derivative liabilities and a regulatory asset. There was no material change in the fair value of the swap for the three and nine months ended September 30, 2010. In the event O&R's credit rating was downgraded to BBB- or lower by Standard & Poor's Rating Services or Baa3 or lower by Moody's Investors Service, the swap counterparty could elect to terminate the agreement and, if it did so, the parties would then be required to settle the transaction.

Fair Value Measurements

9 Months Ended

Sep. 30, 2010

Fair Value Measurements

Note L — Fair Value Measurements

Effective January 1, 2010, the Companies adopted Accounting Standards Update (ASU) No. 2010-06, "Fair Value Measurements and Disclosures (Topic 820): Improving Disclosures about Fair Value Measurements," except as discussed below. This update requires the Companies to disclose significant transfers in and out of Level 1 and Level 2 fair value measurements and describe the reasons for the transfers. The guidance also clarifies level of disaggregation and disclosure requirements about inputs and valuation techniques used to measure fair value for both recurring and nonrecurring fair value measurements and the meaning of a class of assets and liabilities. In addition, the update requires the Companies to present information about purchases, sales, issuances, and settlements on a gross basis in the reconciliation for fair value measurements using significant unobservable inputs (Level 3). This disclosure is effective for fiscal years beginning after December 15, 2010 and for interim periods within those fiscal years.

The accounting rules for fair value measurements and disclosures established a fair value hierarchy, which 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. See Note P to the financial statements in Item 8 of the Form 10-K for how the Companies classify fair value balances based on the fair value hierarchy.

The valuation technique used by the Companies with regard to commodity derivatives and other assets that fall into either Level 2 or Level 3 is the market approach, which uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The valuation technique used by the Companies with regard to the interest rate contract that falls into Level 3 is the income approach which uses valuation techniques to convert future income stream amounts to a single amount in present value terms.

Assets and liabilities measured at fair value on a recurring basis as of September 30, 2010 are summarized below.


	Level 1				Level 2						Level 3						Netting Adjustments(4)						Total
*(Millions of Dollars)*	Con Edison		CECONY		Con Edison			CECONY			Con Edison			CECONY			Con Edison			CECONY			Con Edison			CECONY
Derivative assets:
Commodity	$	1	$	—	$	75		$	8		$	212		$	12		$	(167	)	$	16		$	121		$	36
Commodity(1)	$	1	$	—	$	75		$	8		$	212		$	12		$	(167	)	$	16		$	121		$	36
Other assets(3)		57		57		—			—			96			87			—			—			153			144
Total	$	58	$	57	$	75		$	8		$	308		$	99		$	(167	)	$	16		$	274		$	180
Derivative liabilities:
Commodity	$	10	$	8	$	356		$	209		$	358		$	51		$	(449	)	$	(127	)	$	275		$	141
Transfers in(5) (7)		—		—		(9	)		(9	)		(11	)		(11	)		—			—			(20	)		(20	)
Transfers out(5) (7)		—		—		11			11			9			9			—			—			20			20
Commodity(1)	$	10	$	8	$	358		$	211		$	356		$	49		$	(449	)	$	(127	)	$	275		$	141
Interest rate contract(2)		—		—		—			—			12			—			—			—			12			—
Total	$	10	$	8	$	358		$	211		$	368		$	49		$	(449	)	$	(127	)	$	287		$	141

(1)

A significant portion of the commodity derivative contracts categorized in Level 3 is valued using either an industry acceptable model or an internally developed model with observable inputs. The models also include some less readily observable inputs resulting in the classification of the entire contract as Level 3. See Note K.

(2)	See Note K.

(3)	Other assets are comprised of assets such as life insurance contracts within the Deferred Income Plan and Supplemental Retirement Income Plans, held in rabbi trusts.

(4)	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.

(5)	The Companies' policy is to recognize transfers into and transfers out of the levels at the end of the reporting period.

(6)	Transferred from Level 2 to Level 3 because of reassessment of the levels in the fair value hierarchy within which certain inputs fall.

(7)	Transferred from Level 3 to Level 2 because of availability of observable market data due to decrease in the terms of certain contracts from beyond one year as of June 30, 2010 to less than one year as of September 30, 2010.

Assets and liabilities measured at fair value on a recurring basis as of December 31, 2009 are summarized below.


	Level 1				Level 2				Level 3				Netting Adjustments(4)						Total
*(Millions of Dollars)*	Con Edison		CECONY		Con Edison		CECONY		Con Edison		CECONY		Con Edison			CECONY			Con Edison		CECONY
Derivative assets:
Commodity(1)	$	3	$	3	$	92	$	21	$	201	$	17	$	(166	)	$	(2	)	$	130	$	39
Other assets(3)		36		36		—		—		92		83		—			—			128		119
Total	$	39	$	39	$	92	$	21	$	293	$	100	$	(166	)	$	(2	)	$	258	$	158
Derivative liabilities:
Commodity(1)	$	6	$	1	$	296	$	155	$	260	$	22	$	(328	)	$	(89	)	$	234	$	89
Interest rate contract(2)		—		—		—		—		11		—		—			—			11		—
Total	$	6	$	1	$	296	$	155	$	271	$	22	$	(328	)	$	(89	)	$	245	$	89

(1)

(2)	See Note O to the financial statements in Item 8 of the Form 10-K.

(3)	Other assets are comprised of assets such as life insurance contracts within the Deferred Income Plan and Supplemental Retirement Income Plans, held in rabbi trusts.

(4)	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 table listed below provides a reconciliation of the beginning and ending net balances for assets and liabilities measured at fair value for the three and nine months ended September 30, 2010 and classified as Level 3 in the fair value hierarchy:


	For the Three Months Ended September 30, 2010
				Total Gains/(Losses)— Realized and Unrealized
*(Millions of Dollars)*	Beginning Balance as of July 1, 2010			Included in Earnings			Included in Regulatory Assets and Liabilities			Purchases, Issuances, Sales and Settlements		Transfer In/Out of Level 3			Ending Balance as of September 30, 2010
Con Edison
Derivatives:
Commodity	$	(101	)	$	(45	)	$	(12	)	$	16	$	(2	)	$	(144	)
Interest rate contract		(12	)		—			—			—		—			(12	)
Other(1)		94			—			2			—		—			96
Total	$	(19	)	$	(45	)	$	(10	)	$	16	$	(2	)	$	(60	)
CECONY
Derivatives:
Commodity	$	(30	)	$	(7	)	$	(3	)	$	5	$	(2	)	$	(37	)
Other(1)		85			—			2			—		—			87
Total	$	55		$	(7	)	$	(1	)	$	5	$	(2	)	$	50

(1)	Amounts included in earnings are reported in investment and other income on the consolidated income statement.


	For the Nine Months Ended September 30, 2010
				Total Gains/(Losses)— Realized and Unrealized
*(Millions of Dollars)*	Beginning Balance as of January 1, 2010			Included in Earnings			Included in Regulatory Assets and Liabilities			Purchases, Issuances, Sales and Settlements			Transfer In/Out of Level 3		Ending Balance as of September 30, 2010
Con Edison
Derivatives:
Commodity	$	(59	)	$	(95	)	$	(55	)	$	44		$	21	$	(144	)
Interest rate contract		(11	)		(2	)		(1	)		2			—		(12	)
Other(1)		92			—			4			—			—		96
Total	$	22		$	(97	)	$	(52	)	$	46		$	21	$	(60	)
CECONY
Derivatives:
Commodity	$	(5	)	$	(14	)	$	(37	)	$	(2	)	$	21	$	(37	)
Other(1)		83			—			4			—			—		87
Total	$	78		$	(14	)	$	(33	)	$	(2	)	$	21	$	(50	)

(1)	Amounts included in earnings are reported in investment and other income on the consolidated income statement.

The table listed below provides a reconciliation of the beginning and ending net balances for assets and liabilities measured at fair value for the three and nine months ended September 30, 2009 and classified as Level 3 in the fair value hierarchy:


	For the Three Months Ended September 30, 2009
				Total Gains/(Losses)— Realized and Unrealized
*(Millions of Dollars)*	Beginning Balance as of July 1, 2009			Included in Earnings			Included in Regulatory Assets and Liabilities		Purchases, Issuances, Sales and Settlements		Transfer In/Out of Level 3			Ending Balance as of September 30, 2009
Con Edison
Derivatives:
Energy	$	(85	)	$	(108	)	$	56	$	81	$	(1	)	$	(57	)
Financial & other		(12	)		—			—		—		—			(12	)
Other		82			3			3		—		—			88
Total	$	(15	)	$	(105	)	$	59	$	81	$	(1	)	$	19
Con Edison of New York
Derivatives:
Energy	$	2		$	(11	)	$	28	$	2	$	(1	)	$	20
Other		74			3			2		—		—			79
Total	$	76		$	(8	)	$	30	$	2	$	(1	)	$	99


	For the Nine Months Ended September 30, 2009
				Total Gains/(Losses)— Realized and Unrealized
*(Millions of Dollars)*	Beginning Balance as of January 1, 2009			Included in Earnings			Included in Regulatory Assets and Liabilities		Purchases, Issuances, Sales and Settlements		Transfer In/Out of Level 3			Ending Balance as of September 30, 2009
Con Edison
Derivatives:
Energy	$	(50	)	$	(213	)	$	5	$	202	$	(1	)	$	(57	)
Financial & other		(15	)		—			3		—		—			(12	)
Other		73			6			9		—		—			88
Total	$	8		$	(207	)	$	17	$	202	$	(1	)	$	19
Con Edison of New York
Derivatives:
Energy	$	1		$	(17	)	$	13	$	24	$	(1	)	$	20
Other		65			6			8		—		—			79
Total	$	66		$	(11	)	$	21	$	24	$	(1	)	$	99

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 commissions. See Note A to the financial statements in Item 8 of the Form 10-K. 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 competitive energy businesses, realized and unrealized gains and losses on Level 3 commodity derivative assets and liabilities are reported in non-utility revenues ($14 million gain and $68 million loss) and purchased power costs ($33 million loss and immaterial) on the consolidated income statement for the three months ended September 30, 2010 and 2009, respectively. Realized and unrealized gains and losses on Level 3 commodity derivative assets and liabilities are reported in non-utility revenues ($47 million gain and $121 million loss) and purchased power costs ($73 million loss and $2 million loss) on the consolidated income statement for the nine months ended September 30, 2010 and 2009, respectively. The change in fair value relating to Level 3 commodity derivative assets and liabilities held at September 30, 2010 is included in non-utility revenues ($3 million loss) and purchased power costs ($22 million loss) on the consolidated income statement for the three months ended September 30, 2010. For the three months ended September 30, 2009, the change in fair value relating to Level 3 commodity derivative assets and liabilities included in non-utility revenues was a $15 million loss and was immaterial in purchased power costs. The change in fair value relating to Level 3 commodity derivative assets and liabilities held at September 30, 2010 is included in non-utility revenues ($2 million loss) and purchased power costs ($29 million loss) on the consolidated income statement for the nine months ended September 30, 2010. For the nine months ended September 30, 2009, the change in fair value relating to Level 3 commodity derivative assets and liabilities included in non-utility revenues was a $15 million loss and was immaterial in purchased power costs.

For the Utilities, realized and unrealized gains and losses on Level 3 other assets and liabilities were immaterial for the three months ended September 30, 2010 and a $3 million gain, which is reported in investment and other income on the consolidated income statement, for the three months ended September 30, 2009. Realized and unrealized gains and losses on Level 3 other assets and liabilities were immaterial for the nine months ended September 30, 2010 and a $6 million gain, which is reported in investment and other income on the consolidated income statement for the nine months ended September 30, 2009.

- Definition

This element represents the disclosure related to the fair value measurement of assets and liabilities which includes [financial] instruments measured at fair value that are classified in stockholders' equity. Such assets and liabilities may be measured on a recurring or nonrecurring basis. The disclosures which may be required or desired include: (1) for assets and liabilities measured on a recurring basis, disclosure may include: (a) the fair value measurements at the reporting date; (b) the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3); (c) for fair value measurements using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (i) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (ii) purchases, sales, issuances, and settlements (net); (iii) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs); (d) the amount of the total gains or losses for the period in subparagraph (c) (i) above included in earnings (or changes in net assets) that are attributable to the change in unrealized gains or losses relating to those assets and liabilities still held at the reporting date and a description of where those unrealized gains or losses are reported in the statement of income (or activities); (e) the valuation technique(s) used to measure fair value and a discussion of changes in valuation techniques, if any, during the period and (2) for assets and liabilities that are measured at fair value on a nonrecurring basis (for example, impaired assets) disclosure may include, in addition to (a) above: (a) the reasons for the fair value measurements recorded; (b) the same as (b) above; (c) for fair value measurements using significant unobservable inputs (Level 3), a description of the inputs and the information used to develop the inputs; and (d) the valuation technique(s) used to measure fair value and a discussion of changes, if any, in the valuation technique(s) used to measure similar assets and/or liabilities in prior periods.

+ References+ Details

Variable Interest Entities	9 Months Ended
Variable Interest Entities	Sep. 30, 2010
Variable Interest Entities	Note M — Variable Interest Entities Reference is made to Notes Q and T to the financial statements in Item 8 of the Form 10-K and Note L to the financial statements in Part I, Item 1 of the First Quarter Form 10-Q and Second Quarter Form 10-Q.

- Definition

Disclosure of variable interest entities (VIE), including, but not limited to the nature, purpose, size, and activities of the VIE, the carrying amount and classification of consolidated assets that are collateral for the VIE's obligations, lack of recourse if creditors (or beneficial interest holders) of a consolidated VIE have no recourse to the general credit of the primary beneficiary. An enterprise that holds a significant variable interest in a VIE but is not the primary beneficiary may disclose the nature of its involvement with the VIE and when that involvement began, the nature, purpose, size, and activities of the VIE and the enterprise's maximum exposure to loss as a result of its involvement with the VIE.

+ References+ Details

New Financial Accounting Standards	9 Months Ended
New Financial Accounting Standards	Sep. 30, 2010
New Financial Accounting Standards	Note N — New Financial Accounting Standards Reference is made to Note T to the financial statements in Item 8 of the Form 10-K and Note M to the financial statements in Part I, Item 1 of the First Quarter Form 10-Q and Second Quarter Form 10-Q.

Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2010

Earnings Per Common Share


	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
*(Millions of Dollars, except per share amounts/Shares in Millions)*	2010		2009		2010		2009
Net income for common stock	$	350	$	336	$	759	$	666
Weighted average common shares outstanding – Basic		283.0		275.1		282.2		274.5
Add: Incremental shares attributable to effect of potentially dilutive securities		1.6		0.9		1.5		0.9
Adjusted weighted average common shares outstanding – Diluted		284.6		276.0		283.7		275.4
Net income for common stock per common share – basic	$	1.24	$	1.22	$	2.69	$	2.43
Net income for common stock per common share – diluted	$	1.23	$	1.22	$	2.68	$	2.42

Regulatory Matters (Tables)

9 Months Ended

Sep. 30, 2010

Regulatory Assets and Liabilities


	Con Edison				CECONY
*(Millions of Dollars)*	2010		2009		2010		2009
Regulatory assets
Unrecognized pension and other postretirement costs	$	4,001	$	4,472	$	3,819	$	4,259
Future federal income tax		1,411		1,316		1,337		1,249
Environmental remediation costs		421		388		333		329
Surcharge for New York State Assessment		185		138		171		126
Net electric deferrals		161		82		161		82
Pension and other postretirement benefits deferrals		158		101		106		49
Revenue taxes		139		119		135		116
Deferred derivative losses – long-term		125		106		85		75
Deferred storm costs		58		5		43		—
Property tax reconciliation		52		85		47		85
O&R transition bond charges		49		55		—		—
World Trade Center restoration costs		44		41		44		41
Workers' compensation		34		37		34		37
Other		143		158		135		142
Regulatory assets – long-term		6,981		7,103		6,450		6,590
Deferred derivative losses – current		268		141		218		104
Recoverable energy costs – current		8		31		—		—
Regulatory assets – current		276		172		218		104
Total Regulatory Assets	$	7,257	$	7,275	$	6,668	$	6,694
Regulatory liabilities
Allowance for cost of removal less salvage	$	405	$	371	$	334	$	303
Net unbilled revenue deferrals		126		91		126		91
Refundable energy costs		78		118		53		77
Revenue decoupling mechanism		55		—		55		—
New York State tax refund		29		—		29		—
Gain on sale of First Avenue properties		23		23		23		23
Gain on sale of 125th Street Property		12		—		12		—
Rate case amortizations		5		21		5		21
Electric rate case deferral		—		19		—		19
2005-2008 capital expenditure reserve		—		24		—		24
Other		198		162		173		145
Regulatory liabilities		931		829		810		703
Deferred derivative gains – current		—		9		—		8
Total Regulatory Liabilities	$	931	$	838	$	810	$	711

Pension Benefits (Tables)

9 Months Ended

Sep. 30, 2010

Companies' net periodic benefit costs


	For the Three Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2010			2009			2010			2009
Service cost – including administrative expenses	$	42		$	40		$	39		$	37
Interest cost on projected benefit obligation		139			131			130			123
Expected return on plan assets		(175	)		(173	)		(167	)		(165	)
Amortization of net actuarial loss		106			75			100			68
Amortization of prior service costs		2			2			2			2
NET PERIODIC BENEFIT COST	$	114		$	75		$	104		$	65
Amortization of regulatory asset*		—			1			—			1
TOTAL PERIODIC BENEFIT COST	$	114		$	76		$	104		$	66
Cost capitalized		(40	)		(28	)		(36	)		(25	)
Cost deferred		(29	)		(4	)		(29	)		(3	)
Cost charged to operating expenses	$	45		$	44		$	39		$	38

*	Relates to increases in CECONY's pension obligations of $45 million from a 1999 special retirement program.


	For the Nine Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2010			2009			2010			2009
Service cost – including administrative expenses	$	126		$	120		$	117		$	111
Interest cost on projected benefit obligation		417			393			390			369
Expected return on plan assets		(527	)		(519	)		(501	)		(495	)
Amortization of net actuarial loss		318			225			300			204
Amortization of prior service costs		6			6			6			6
NET PERIODIC BENEFIT COST	$	340		$	225		$	312		$	195
Amortization of regulatory asset*		1			3			1			3
TOTAL PERIODIC BENEFIT COST	$	341		$	228		$	313		$	198
Cost capitalized		(118	)		(82	)		(109	)		(75	)
Cost deferred		(85	)		(40	)		(82	)		(34	)
Cost charged to operating expenses	$	138		$	106		$	122		$	89

*	Relates to increases in CECONY's pension obligations of $33 million from a 1993 special retirement program (which was fully amortized in March 2009) and $45 million from a 1999 special retirement program.

Other Postretirement Benefits (Tables)

3 Months Ended

9 Months Ended

Sep. 30, 2010

Companies' net periodic postretirement benefit costs


	For the Three Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2010			2009			2010			2009
Service cost	$	6		$	5		$	5		$	4
Interest cost on accumulated other postretirement benefit obligation		23			24			20			21
Expected return on plan assets		(22	)		(21	)		(19	)		(20	)
Amortization of net actuarial loss		23			18			21			16
Amortization of prior service cost		(3	)		(3	)		(4	)		(3	)
Amortization of transition obligation		1			1			1			1
NET PERIODIC POSTRETIREMENT BENEFIT COST	$	28		$	24		$	24		$	19
Cost capitalized		(10	)		(9	)		(8	)		(7	)
Cost deferred		2			1			1			—
Cost charged to operating expenses	$	20		$	16		$	17		$	12


	For the Nine Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2010			2009			2010			2009
Service cost	$	18		$	15		$	15		$	12
Interest cost on accumulated other postretirement benefit obligation		69			72			60			63
Expected return on plan assets		(66	)		(63	)		(57	)		(60	)
Amortization of net actuarial loss		69			54			63			48
Amortization of prior service cost		(9	)		(9	)		(12	)		(9	)
Amortization of transition obligation		3			3			3			3
NET PERIODIC POSTRETIREMENT BENEFIT COST	$	84		$	72		$	72		$	57
Cost capitalized		(30	)		(27	)		(25	)		(22	)
Cost deferred		2			—			(1	)		(2	)
Cost charged to operating expenses	$	56		$	45		$	46		$	33

Environmental Matters (Tables)

3 Months Ended

9 Months Ended

Sep. 30, 2010

Accrued liabilities and regulatory assets


	Con Edison				CECONY
*(Millions of Dollars)*	2010		2009		2010		2009
Accrued Liabilities:
Manufactured gas plant sites	$	193	$	164	$	109	$	112
Other Superfund Sites		46		48		45		47
Total	$	239	$	212	$	154	$	159
Regulatory assets	$	421	$	388	$	333	$	329


	Con Edison				CECONY
*(Millions of Dollars)*	2010		2009		2010		2009
Accrued Liabilities:
Manufactured gas plant sites	$	193	$	164	$	109	$	112
Other Superfund Sites		46		48		45		47
Total	$	239	$	212	$	154	$	159
Regulatory assets	$	421	$	388	$	333	$	329

Environmental remediation costs


	For the Three Months Ended September 30,
	Con Edison				CECONY
*(Millions of Dollars)*	2010		2009		2010		2009
Remediation costs incurred	$	9	$	20	$	8	$	20
Insurance recoveries received	$	—	$	3	$	—	$	3


	For the Nine Months Ended September 30,
	Con Edison				CECONY
*(Millions of Dollars)*	2010		2009		2010		2009
Remediation costs incurred	$	32	$	60	$	30	$	59
Insurance recoveries received	$	—	$	3	$	—	$	3

Accrued liabilities for asbestos suits and workers' compensation proceedings


	Con Edison				CECONY
*(Millions of Dollars)*	2010		2009		2010		2009
Accrued liability – asbestos suits	$	10	$	10	$	9	$	9
Regulatory assets – asbestos suits	$	10	$	10	$	9	$	9
Accrued liability – workers' compensation	$	109	$	113	$	104	$	108
Regulatory assets – workers' compensation	$	34	$	37	$	34	$	37

Other Material Contingencies (Tables)

9 Months Ended

Sep. 30, 2010

Total guarantees


Guarantee Type	0 – 3 years		4 –10 years		> 10 years		Total
	*(Millions of Dollars)*
Commodity transactions	$	618	$	9	$	128	$	755
Affordable housing program		4		—		—		4
Intra-company guarantees		30		—		1		31
Other guarantees		63		20		—		83
TOTAL	$	715	$	29	$	129	$	873

Financial Information by Business Segment (Tables)

9 Months Ended

Sep. 30, 2010

Financial data for the business segments


	For the Three Months Ended September 30,
	Operating revenues						Inter-segment revenues						Depreciation and amortization				Operating income
*(Millions of Dollars)*	2010			2009			2010			2009			2010		2009		2010			2009
Con Edison of New York
Electric	$	2,570		$	2,395		$	3		$	3		$	156	$	149	$	715		$	641
Gas		204			183			1			1			26		24		(16	)		(28	)
Steam		91			77			18			18			16		15		(33	)		(34	)
Consolidation adjustments		—			—			(22	)		(22	)		—		—		—			—
Total Con Edison of New York	$	2,865		$	2,655		$	—		$	—		$	198	$	188	$	666		$	579
O&R
Electric	$	245		$	209		$	—		$	—		$	8	$	7	$	52		$	40
Gas		25			26			—			—			3		3		(4	)		(5	)
Total O&R	$	270		$	235		$	—		$	—		$	11	$	10	$	48		$	35
Competitive energy businesses	$	584		$	610		$	—		$	2		$	2	$	2	$	(8	)	$	70
Other*		(12	)		(11	)		—			(2	)		—		—		(1	)		1
Total Con Edison	$	3,707		$	3,489		$	—		$	—		$	211	$	200	$	705		$	685

*	Parent company expenses, primarily interest, and consolidation adjustments. Other does not represent a business segment.


	For the Nine Months Ended September 30,
	Operating revenues						Inter-segment revenues						Depreciation and amortization				Operating Income
*(Millions of Dollars)*	2010			2009			2010			2009			2010		2009		2010			2009
Con Edison of New York
Electric	$	6,402		$	5,865		$	9		$	9		$	464	$	437	$	1,228		$	1,090
Gas		1,126			1,259			4			4			76		73		243			223
Steam		487			521			55			54			46		44		41			40
Consolidation adjustments		—			—			(68	)		(67	)		—		—		—			—
Total Con Edison of New York	$	8,015		$	7,645		$	—		$	—		$	586	$	554	$	1,512		$	1,353
O&R
Electric	$	559		$	499		$	—		$	—		$	24	$	22	$	71		$	57
Gas		150			171			—			—			9		9		20			16
Total O&R	$	709		$	670		$	—		$	—		$	33	$	31	$	91		$	73
Competitive energy businesses	$	1,491		$	1,477		$	—		$	(1	)	$	6	$	4	$	25		$	52
Other*		(30	)		(34	)		—			1			—		—		(1	)		(2	)
Total Con Edison	$	10,185		$	9,758		$	—		$	—		$	626	$	589	$	1,627		$	1,476

*	Parent company expenses, primarily interest, and consolidation adjustments. Other does not represent a business segment.

Derivative Instruments and Hedging Activities (Tables)

9 Months Ended

Sep. 30, 2010

Energy price hedging fair values


	Con Edison						CECONY
*(Millions of Dollars)*	2010			2009			2010			2009
Fair value of net derivative (liabilities) – gross	$	(436	)	$	(266	)	$	(248	)	$	(137	)
Impact of netting of cash collateral		282			162			143			87
Fair value of net derivative (liabilities) – net	$	(154	)	$	(104	)	$	(105	)	$	(50	)

Fair values of the Companies' commodity derivatives

The fair values of the Companies' commodity derivatives at September 30, 2010 were:


*(Millions of Dollars)*	Fair Value of Commodity Derivatives(a) Balance Sheet Location	Con Edison			CECONY
Asset Derivatives
Current	Other current assets	$	234		$	18
Long term	Other deferred charges and non-current assets		67			12
Total asset derivatives		$	301		$	30
Impact of netting			(181	)		6
Net asset derivatives		$	120		$	36
Liability Derivatives
Current	Fair value of derivative liabilities	$	538		$	—
Current	Other current liabilities		—			192
Long term	Fair value of derivative liabilities		199			86
Total liability derivatives		$	737		$	278
Impact of netting			(463	)		(137	)
Net liability derivatives		$	274		$	141

(a)	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.

The fair value of the Companies' commodity derivatives at December 31, 2009 were:


*(Millions of Dollars)*	Fair Value of Commodity Derivatives(a) Balance Sheet Location	Con Edison			CECONY
Asset Derivatives
Current	Fair value of derivative assets	$	213		$	40
Long term	Other deferred charges and non-current assets		148			19
Total asset derivatives		$	361		$	59
Impact of netting			(231	)		(20	)
Net asset derivatives		$	130		$	39
Liability Derivatives
Current	Fair value of derivative liabilities	$	401		$	110
Long term	Fair value of derivative liabilities		226			86
Total liability derivatives		$	627		$	196
Impact of netting			(393	)		(107	)
Net liability derivatives		$	234		$	89

(a)	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.

Changes in the fair values of commodity derivatives

The following table presents the changes in the fair values of commodity derivatives that have been deferred or recognized in earnings for the three and nine months ended September 30, 2010:


Realized and Unrealized Gains/(Losses) on Commodity Derivatives(a) Deferred or Recognized in Income for the Three Months Ended September 30, 2010
*(Millions of Dollars)*	Balance Sheet Location	Con Edison			CECONY
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations:
Current	Other current liabilities	$	(3	)	$	(3	)
Total deferred losses		$	(3	)	$	(3	)
Current	Other current assets	$	(61	)	$	(54	)
Current	Recoverable energy costs		(70	)		(63	)
Long term	Regulatory assets		4			7
Total deferred losses		$	(127	)	$	(110	)
Net deferred losses		$	(130	)	$	(113	)
	Income Statement Location
Pre-tax gain/(loss) recognized in income
	Purchased power expense	$	(26	)(b)	$	—
	Gas purchased for resale		(1	)		—
	Non-utility revenue		4	(b)		—
Total pre-tax gain/(loss) recognized in income		$	(23	)	$	—

(a)	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.

(b)	For the three months ended September 30, 2010, Con Edison recorded in non-utility operating revenues and purchased power expense an unrealized pre-tax gain/(loss) of $(3)million and $(34) million, respectively.


Realized and Unrealized Gains/(Losses) on Commodity Derivatives(a) Deferred or Recognized in Income for the Nine Months Ended September 30, 2010
*(Millions of Dollars)*	Balance Sheet Location	Con Edison			CECONY
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations:
Current	Other current liabilities	$	(8	)	$	(8	)
Total deferred losses		$	(8	)	$	(8	)
Current	Other current assets	$	(127	)	$	(114	)
Current	Recoverable energy costs	$	(205	)	$	(172	)
Long term	Regulatory assets	$	(19	)	$	(11	)
Total deferred losses		$	(351	)	$	(297	)
Net deferred losses		$	(359	)	$	(305	)
	Income Statement Location
Pre-tax gain/(loss) recognized in income
	Purchased power expense	$	(132	)	$	—
	Gas purchased for resale		(7	)		—
	Non-utility revenue		21	(b)		—
Total pre-tax gain/(loss) recognized in income		$	(118	)	$	—

(a)	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.

(b)	For the nine months ended September 30, 2010, Con Edison recorded in non-utility operating revenues and purchased power expense an unrealized pre-tax gain/(loss) of $(1) million and $(34) million, respectively.

The following table presents the changes in the fair values of commodity derivatives that have been deferred or recognized in earnings for the three and nine months ended September 30, 2009:


Realized and Unrealized Gains/(Losses) on Commodity Derivatives(a) Deferred or Recognized in Income for the Three Months Ended September 30, 2009
*(Millions of Dollars)*	Balance Sheet Location	Con Edison			Con Edison of New York
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations:
Current	Deferred derivative gains	$	4		$	4
Long term	Regulatory liabilities		2			—
Total deferred gains		$	6		$	4
Current	Deferred derivative losses	$	111		$	97
Current	Recoverable energy costs	$	(158	)	$	(134	)
Long term	Regulatory assets	$	29		$	21
Total deferred losses		$	(18	)	$	(16	)
Net deferred losses		$	(12	)	$	(12	)
	Income Statement Location
Pre-tax gain/(loss) recognized in income
	Purchased power expense	$	(176	)	$	—
	Gas purchased for resale		(9	)		—
	Non-utility revenue		27	(b)		—
Total pre-tax gain/(loss) recognized in income		$	(158	)	$	—

(a)	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.

(b)	For the three months ended September 30, 2009, Con Edison recorded in non-utility operating revenues an unrealized pre-tax gain of $28 million.


Realized and Unrealized Gains/(Losses) on Commodity Derivatives(a) Deferred or Recognized in Income for the Nine Months Ended September 30, 2009
*(Millions of Dollars)*	Balance Sheet Location	Con Edison			Con Edison of New York
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations:
Current	Deferred derivative gains	$	(9	)	$	(9	)
Long term	Regulatory liabilities		3			—
Total deferred gains		$	(6	)	$	(9	)
Current	Deferred derivative losses	$	136		$	136
Current	Recoverable energy costs	$	(462	)	$	(394	)
Long term	Regulatory assets	$	8		$	4
Total deferred losses		$	(318	)	$	(254	)
Net deferred losses		$	(324	)	$	(263	)
	Income Statement Location
Pre-tax gain/(loss) recognized in income
	Purchased power expense	$	(432	)	$	—
	Gas purchased for resale		(7	)		—
	Non-utility revenue		(5	)(b)		—
Total pre-tax gain/(loss) recognized in income		$	(444	)	$	—

(a)	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.

(b)	For the nine months ended September 30, 2009, Con Edison recorded in non-utility operating revenues an unrealized pre-tax gain of $2 million.

Number of derivative contracts by commodity type


	Electric Derivatives								Gas Derivatives
	Number of Energy Contracts(a)		MWhs(b)		Number of Capacity Contracts(a)		MWs(b)		Number of Contracts(a)		Dths(b)		Total Number of Contracts(a)
Con Edison		690		18,268,063		63		9,075		722		141,570,000		1,475
CECONY		137		3,738,600		—		—		556		131,790,000		693

(a)	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.

(b)	Volumes are reported net of long and short positions.

Aggregate fair value of all derivative instruments with credit risk related contingent features


*(Millions of Dollars)*	Con Edison(a)			CECONY(a)
Aggregate fair value – net liabilities	$	443		$	180
Collateral posted	$	240		$	92	(b)
Additional collateral(c) (downgrade one level from current ratings(d))	$	53		$	35
Additional collateral(c) (downgrade to below investment grade from current ratings(d))	$	324	(e)	$	103

(a)

(b)	Across the Utilities' energy derivative positions, credit limits for the same counterparties are generally integrated. At September 30, 2010, the Utilities posted combined collateral of $126 million, including an estimated $34 million attributable to O&R.

(c)

(d)

(e)	Derivative instruments that are net assets have been excluded from the table. At September 30, 2010, if Con Edison had been downgraded to below investment grade, it would have been required to post additional collateral for such derivative instruments of not more than $20 million.

- Definition

This element may be used to tag a single block of text that encapsulates the entire credit derivatives disclosure including data and tables. This disclosures provides pertinent information by sellers of credit derivatives, about each credit derivative, or each group of similar credit derivatives, including (a) the nature of the credit derivative - its term, how it arose, the events or circumstances that would require the seller to perform under the credit derivative, and the current status of the payment/performance risk of the credit derivative; (b) the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative; (c) the current fair value of the credit derivative; and (d) the nature of any recourse provisions under the credit derivative, and any assets held either as collateral or by third parties. A credit derivative is a derivative instrument (1) in which one or more of its underlyings are related to the credit risk of a specified entity (or a group of entities) or an index based on the credit risk of a group of entities and (2) that exposes the seller to potential loss from credit-risk-related events specified in the contract. Examples of credit derivatives within the scope of this paragraph include, but are not limited to, credit default swaps, credit spread options, and credit index products; also includes a hybrid instrument that has an embedded credit derivative (for example, a credit-linked note).

+ References+ Details

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2010

Assets and liabilities measured at fair value on a recurring basis

Assets and liabilities measured at fair value on a recurring basis as of September 30, 2010 are summarized below.


	Level 1				Level 2						Level 3						Netting Adjustments(4)						Total
*(Millions of Dollars)*	Con Edison		CECONY		Con Edison			CECONY			Con Edison			CECONY			Con Edison			CECONY			Con Edison			CECONY
Derivative assets:
Commodity	$	1	$	—	$	75		$	8		$	212		$	12		$	(167	)	$	16		$	121		$	36
Commodity(1)	$	1	$	—	$	75		$	8		$	212		$	12		$	(167	)	$	16		$	121		$	36
Other assets(3)		57		57		—			—			96			87			—			—			153			144
Total	$	58	$	57	$	75		$	8		$	308		$	99		$	(167	)	$	16		$	274		$	180
Derivative liabilities:
Commodity	$	10	$	8	$	356		$	209		$	358		$	51		$	(449	)	$	(127	)	$	275		$	141
Transfers in(5) (7)		—		—		(9	)		(9	)		(11	)		(11	)		—			—			(20	)		(20	)
Transfers out(5) (7)		—		—		11			11			9			9			—			—			20			20
Commodity(1)	$	10	$	8	$	358		$	211		$	356		$	49		$	(449	)	$	(127	)	$	275		$	141
Interest rate contract(2)		—		—		—			—			12			—			—			—			12			—
Total	$	10	$	8	$	358		$	211		$	368		$	49		$	(449	)	$	(127	)	$	287		$	141

(1)

(2)	See Note K.

(3)	Other assets are comprised of assets such as life insurance contracts within the Deferred Income Plan and Supplemental Retirement Income Plans, held in rabbi trusts.

(4)	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.

(5)	The Companies' policy is to recognize transfers into and transfers out of the levels at the end of the reporting period.

(6)	Transferred from Level 2 to Level 3 because of reassessment of the levels in the fair value hierarchy within which certain inputs fall.

(7)	Transferred from Level 3 to Level 2 because of availability of observable market data due to decrease in the terms of certain contracts from beyond one year as of June 30, 2010 to less than one year as of September 30, 2010.

Assets and liabilities measured at fair value on a recurring basis as of December 31, 2009 are summarized below.


	Level 1				Level 2				Level 3				Netting Adjustments(4)						Total
*(Millions of Dollars)*	Con Edison		CECONY		Con Edison		CECONY		Con Edison		CECONY		Con Edison			CECONY			Con Edison		CECONY
Derivative assets:
Commodity(1)	$	3	$	3	$	92	$	21	$	201	$	17	$	(166	)	$	(2	)	$	130	$	39
Other assets(3)		36		36		—		—		92		83		—			—			128		119
Total	$	39	$	39	$	92	$	21	$	293	$	100	$	(166	)	$	(2	)	$	258	$	158
Derivative liabilities:
Commodity(1)	$	6	$	1	$	296	$	155	$	260	$	22	$	(328	)	$	(89	)	$	234	$	89
Interest rate contract(2)		—		—		—		—		11		—		—			—			11		—
Total	$	6	$	1	$	296	$	155	$	271	$	22	$	(328	)	$	(89	)	$	245	$	89

(1)

(2)	See Note O to the financial statements in Item 8 of the Form 10-K.

(3)	Other assets are comprised of assets such as life insurance contracts within the Deferred Income Plan and Supplemental Retirement Income Plans, held in rabbi trusts.

(4)	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.

Reconciliation of the beginning and ending net balances for assets and liabilities measured at Level 3 fair value


	For the Three Months Ended September 30, 2010
				Total Gains/(Losses)— Realized and Unrealized
*(Millions of Dollars)*	Beginning Balance as of July 1, 2010			Included in Earnings			Included in Regulatory Assets and Liabilities			Purchases, Issuances, Sales and Settlements		Transfer In/Out of Level 3			Ending Balance as of September 30, 2010
Con Edison
Derivatives:
Commodity	$	(101	)	$	(45	)	$	(12	)	$	16	$	(2	)	$	(144	)
Interest rate contract		(12	)		—			—			—		—			(12	)
Other(1)		94			—			2			—		—			96
Total	$	(19	)	$	(45	)	$	(10	)	$	16	$	(2	)	$	(60	)
CECONY
Derivatives:
Commodity	$	(30	)	$	(7	)	$	(3	)	$	5	$	(2	)	$	(37	)
Other(1)		85			—			2			—		—			87
Total	$	55		$	(7	)	$	(1	)	$	5	$	(2	)	$	50

(1)	Amounts included in earnings are reported in investment and other income on the consolidated income statement.


	For the Nine Months Ended September 30, 2010
				Total Gains/(Losses)— Realized and Unrealized
*(Millions of Dollars)*	Beginning Balance as of January 1, 2010			Included in Earnings			Included in Regulatory Assets and Liabilities			Purchases, Issuances, Sales and Settlements			Transfer In/Out of Level 3		Ending Balance as of September 30, 2010
Con Edison
Derivatives:
Commodity	$	(59	)	$	(95	)	$	(55	)	$	44		$	21	$	(144	)
Interest rate contract		(11	)		(2	)		(1	)		2			—		(12	)
Other(1)		92			—			4			—			—		96
Total	$	22		$	(97	)	$	(52	)	$	46		$	21	$	(60	)
CECONY
Derivatives:
Commodity	$	(5	)	$	(14	)	$	(37	)	$	(2	)	$	21	$	(37	)
Other(1)		83			—			4			—			—		87
Total	$	78		$	(14	)	$	(33	)	$	(2	)	$	21	$	(50	)

(1)	Amounts included in earnings are reported in investment and other income on the consolidated income statement.

The table listed below provides a reconciliation of the beginning and ending net balances for assets and liabilities measured at fair value for the three and nine months ended September 30, 2009 and classified as Level 3 in the fair value hierarchy:


	For the Three Months Ended September 30, 2009
				Total Gains/(Losses)— Realized and Unrealized
*(Millions of Dollars)*	Beginning Balance as of July 1, 2009			Included in Earnings			Included in Regulatory Assets and Liabilities		Purchases, Issuances, Sales and Settlements		Transfer In/Out of Level 3			Ending Balance as of September 30, 2009
Con Edison
Derivatives:
Energy	$	(85	)	$	(108	)	$	56	$	81	$	(1	)	$	(57	)
Financial & other		(12	)		—			—		—		—			(12	)
Other		82			3			3		—		—			88
Total	$	(15	)	$	(105	)	$	59	$	81	$	(1	)	$	19
Con Edison of New York
Derivatives:
Energy	$	2		$	(11	)	$	28	$	2	$	(1	)	$	20
Other		74			3			2		—		—			79
Total	$	76		$	(8	)	$	30	$	2	$	(1	)	$	99


	For the Nine Months Ended September 30, 2009
				Total Gains/(Losses)— Realized and Unrealized
*(Millions of Dollars)*	Beginning Balance as of January 1, 2009			Included in Earnings			Included in Regulatory Assets and Liabilities		Purchases, Issuances, Sales and Settlements		Transfer In/Out of Level 3			Ending Balance as of September 30, 2009
Con Edison
Derivatives:
Energy	$	(50	)	$	(213	)	$	5	$	202	$	(1	)	$	(57	)
Financial & other		(15	)		—			3		—		—			(12	)
Other		73			6			9		—		—			88
Total	$	8		$	(207	)	$	17	$	202	$	(1	)	$	19
Con Edison of New York
Derivatives:
Energy	$	1		$	(17	)	$	13	$	24	$	(1	)	$	20
Other		65			6			8		—		—			79
Total	$	66		$	(11	)	$	21	$	24	$	(1	)	$	99

Summary of Significant Accounting Policies (Earnings Per Common Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2010	Sep. 30, 2009
Summary of Significant Accounting Policies
Net income for common stock	$ 350	$ 336	$ 759	$ 666
Weighted average common shares outstanding - Basic	283.0	275.1	282.2	274.5
Add: Incremental shares attributable to effect of potentially dilutive securities	1.6	0.9	1.5	0.9
Adjusted weighted average common shares outstanding - Diluted	284.6	276.0	283.7	275.4
Net income for common stock per common share - basic	$ 1.24	$ 1.22	$ 2.69	$ 2.43
Net income for common stock per common share - diluted	$ 1.23	$ 1.22	$ 2.68	$ 2.42

Regulatory Matters (Regulatory assets and liabilities) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2010	Dec. 31, 2009
Regulatory assets	$ 6,981	$ 7,103
Regulatory assets, current	276	172
Total regulatory assets	7,257	7,275
Regulatory liabilities	931	829
Total regulatory liabilities	931	838
CONSOLIDATED EDISON INC [Member]
Regulatory assets	6,981	7,103
Total regulatory assets	276	172
Regulatory liabilities	931	829
Unrecognized Pension And Other Postretirement Costs [Member]
Regulatory assets	4,001	4,472
Future federal income tax [Member]
Regulatory assets	1,411	1,316
Environmental Remediation Costs [Member]
Regulatory assets	421	388
Net Electric Deferrals [Member]
Regulatory assets	161	82
Surcharge for New York State Assessment [Member]
Regulatory assets	185	138
Deferred derivative losses-long-term [Member]
Regulatory assets	125	106
Revenue Taxes [Member]
Regulatory assets	139	119
Pension And Other Post Retirement Benefits Deferrals [Member]
Regulatory assets	158	101
Property Tax Reconciliation [Member]
Regulatory assets	52	85
O and R Transition Bond Charges [Member]
Regulatory assets	49	55
World Trade Center Restoration Costs [Member]
Regulatory assets	44	41
Workers Compensation [Member]
Regulatory assets	34	37
Storm Reserves [Member]
Regulatory assets	58	5
Other [Member]
Regulatory assets	143	158
Deferred derivative losses-current [Member]
Regulatory assets, current	268	141
Recoverable energy costs-current [Member]
Regulatory assets, current	8	31
Allowance for cost of removal less salvage [Member]
Regulatory liabilities	405	371
Refundable Energy Costs [Member]
Regulatory liabilities	78	118
Net unbilled revenue deferrals [Member]
Regulatory liabilities	126	91
Revenue Decoupling Mechanism over collection [Member]
Regulatory liabilities	55
New York State Tax Refund [Member]
Regulatory liabilities	29
2005-2008 capital expenditure reserve [Member]
Regulatory liabilities		24
Gain On Sale Of First Avenue Properties [Member]
Regulatory liabilities	23	23
Gain on sale of 125th Street Property [Member]
Regulatory liabilities	12
Rate Case Amortization [Member]
Regulatory liabilities	5	21
Electric Rate Case Deferral [Member]
Regulatory liabilities		19
Other Liabilities [Member]
Regulatory liabilities	198	162
Deferred Derivative Gains Current [Member]
Regulatory liability, current		$ 9

Capitalization (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended
	Oct. 31, 2010
Capitalization
Common stock, shares, issued	6.3
Proceeds from common stock issued	$ 305

Short-Term Borrowing (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2010	Dec. 31, 2009
Commercial paper outstanding	$ 846
Weighted average interest rate	0.40%
Letters of credit outstanding under the credit agreement	220	193
CECONY [Member]
Commercial paper outstanding	832
Letters of credit outstanding under the credit agreement	$ 151	$ 135

Pension Benefits (Companies' net periodic benefit costs) (Details) (USD $)
In Millions, unless otherwise specified

3 Months Ended

9 Months Ended

Sep. 30, 2010

Sep. 30, 2009

Sep. 30, 2010

Sep. 30, 2009

Defined Benefit Pension [Member]

Service cost - including administrative expenses

$ 42

$ 40

$ 126

$ 120

Interest cost on projected benefit obligation

139

131

417

393

Expected return on plan assets

(175)

(173)

(527)

(519)

Amortization of net actuarial loss

106

318

225

Amortization of prior service costs

NET PERIODIC BENEFIT COST

114

340

225

Amortization of regulatory asset

^[1]

^[2]

TOAL PERIODIC BENEFIT COST

114

341

228

Cost capitalized

(40)

(28)

(118)

(82)

Cost deferred

(29)

(4)

(85)

(40)

Cost charged to operating expenses

138

106

Special retirement program from 1993 [Member] | CECONY [Member]

Increase (Decrease) in Pension Plan Obligations

Special retirement program from 1999 [Member] | CECONY [Member]

Increase (Decrease) in Pension Plan Obligations

$ 45

[1]	Relates to increases in CECONY's pension obligations of $45 million from a 1999 special retirement program.
[2]	Relates to increases in CECONY's pension obligations of $33 million from a 1993 special retirement program (which was fully amortized in March 2009) and $45 million from a 1999 special retirement program.

Other Postretirement Benefits (Companies' net periodic postretirement benefit costs) (Details) (Other Postretirement Benefit Plans, Defined Benefit [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2010	Sep. 30, 2009
Other Postretirement Benefit Plans, Defined Benefit [Member]
Service cost	$ 6	$ 5	$ 18	$ 15
Interest cost on accumulated other postretirement benefit obligation	23	24	69	72
Expected return on plan assets	(22)	(21)	(66)	(63)
Amortization of net actuarial loss	23	18	69	54
Amortization of prior service costs	(3)	(3)	(9)	(9)
Amortization of transition obligation	1	1	3	3
NET PERIODIC POSTRETIREMENT BENEFIT COST	28	24	84	72
Cost capitalized	(10)	(9)	(30)	(27)
Cost deferred	2	1	2
Cost charged to operating expenses	$ 20	$ 16	$ 56	$ 45

Environmental Matters (Accrued liabilities and regulatory assets) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2010	Dec. 31, 2009
Regulatory assets	$ 7,257	$ 7,275
Superfund Sites [Member]
Manufactured gas plant sites	193	164
Other Superfund Sites	46	48
Total	239	212
Regulatory assets	$ 421	$ 388

Environmental Matters (Environmental remediation costs) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2010	Sep. 30, 2009
Remediation costs incurred	$ 9	$ 20	$ 32	$ 60
Insurance recoveries received		$ 3		$ 3

Environmental Matters (Accrued liability for asbestos suits and workers' compensation proceedings) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2010	Dec. 31, 2009
Accrued liability - asbestos suits	$ 10	$ 10
Regulatory assets - asbestos suits	10	10
Accrued liability - workers' compensation	109	113
Regulatory assets - workers' compensation	$ 34	$ 37

Other Material Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified			9 Months Ended
	Sep. 30, 2010	Dec. 31, 2009	Sep. 30, 2010 Tax deficiency paid in December 2005 [Member]	Sep. 30, 2010 Interest in April 2006 [Member]	Sep. 30, 2010 Interest up to September 2010 [Member]	Sep. 30, 2010 Disallowance of Tax 2009 [Member]	Sep. 30, 2010 Disallowance of Tax 2008 [Member]
Lease in lease out total investment	$ 259
Lease in lease out total financed by equity	93
Lease in lease out total financed by long-term debt	166
The company's investment in leverage leases	(36)	(24)
Gross investment in leverage leases	235	235
Deferred tax liabilities	271	259
Tax deficiency paid to IRS			0.3
Interest paid related to tax deficiency				0.2	73.0
Disallowed deduction	416					41	42
Tax savings From LILO transactions	217
Guarantee obligations maximum exposure	$ 873	$ 929

Other Material Contingencies (Total guarantees) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2010	Dec. 31, 2009
Guarantee Obligations Maximum Exposure	$ 873	$ 929
Financial And Performance Guarantee For Commodity Transactions [Member]
Guarantee Obligations Maximum Exposure	755
Financial And Performance Guarantee For Affordable Housing Program [Member]
Guarantee Obligations Maximum Exposure	4
Financial And Performance Guarantee For Intra Company [Member]
Guarantee Obligations Maximum Exposure	31
Financial And Performance Guarantee Other [Member]
Guarantee Obligations Maximum Exposure	83
Guarantee duration, 0-3 years [Member]
Guarantee Obligations Maximum Exposure	715
Guarantee duration, 0-3 years [Member] \| Financial And Performance Guarantee For Commodity Transactions [Member]
Guarantee Obligations Maximum Exposure	618
Guarantee duration, 0-3 years [Member] \| Financial And Performance Guarantee For Affordable Housing Program [Member]
Guarantee Obligations Maximum Exposure	4
Guarantee duration, 0-3 years [Member] \| Financial And Performance Guarantee For Intra Company [Member]
Guarantee Obligations Maximum Exposure	30
Guarantee duration, 0-3 years [Member] \| Financial And Performance Guarantee Other [Member]
Guarantee Obligations Maximum Exposure	63
Guarantee duration, 4-10 years [Member]
Guarantee Obligations Maximum Exposure	29
Guarantee duration, 4-10 years [Member] \| Financial And Performance Guarantee For Commodity Transactions [Member]
Guarantee Obligations Maximum Exposure	9
Guarantee duration, 4-10 years [Member] \| Financial And Performance Guarantee Other [Member]
Guarantee Obligations Maximum Exposure	20
Guarantee duration, greater than 10 years [Member]
Guarantee Obligations Maximum Exposure	129
Guarantee duration, greater than 10 years [Member] \| Financial And Performance Guarantee For Commodity Transactions [Member]
Guarantee Obligations Maximum Exposure	128
Guarantee duration, greater than 10 years [Member] \| Financial And Performance Guarantee For Intra Company [Member]
Guarantee Obligations Maximum Exposure	$ 1

Income Tax (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2010
Tax deposit	$ 51
Deferred income tax liabilities	53
Income taxes receivable	297
Deferred tax asset, current	64
Uncertain income taxes	54
CECONY [Member]
Tax deposit	47
Deferred income tax liabilities	55
Income taxes receivable	281
Deferred tax asset, current	35
Uncertain income taxes	52
New York State [Member]
Uncertain income taxes	8
New York State [Member] \| CECONY [Member]
Uncertain income taxes	$ 8

- Definition

The current portion of the aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; after deducting the allocated valuation allowance, if any, to reduce such amount to net realizable value. Deferred tax liabilities and assets shall be classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, shall be classified according to the expected reversal date of the temporary difference. An unrecognized tax benefit that is directly related to a position taken in a tax year that results in a net operating loss carryforward should be presented as a reduction of the related deferred tax asset.

+ References+ Details

Financial Information by Business Segment (Financial data for the business segments) (Details) (USD $)
In Millions, unless otherwise specified

3 Months Ended

9 Months Ended

Sep. 30, 2010

Sep. 30, 2009

Sep. 30, 2010

Sep. 30, 2009

O&R [Member]

Operating revenues

$ 270

$ 235

$ 709

$ 670

Inter-segment revenues

Depreciation and amortization

Operating income

Consolidation Adjustments [Member]

Operating revenues

Inter-segment revenues

(22)

(68)

(67)

Depreciation and amortization

Operating income

CONSOLIDATED EDISON INC [Member]

Operating revenues

3,707

3,489

10,185

9,758

Inter-segment revenues

Depreciation and amortization

211

200

626

589

Operating income

705

685

1,627

1,476

CONSOLIDATED EDISON CO OF NEW YORK INC [Member]

Operating revenues

2,865

2,655

8,015

7,645

Inter-segment revenues

Depreciation and amortization

198

188

586

554

Operating income

666

579

1,512

1,353

CECONY - Electric [Member]

Operating revenues

2,570

2,395

6,402

5,865

Inter-segment revenues

Depreciation and amortization

156

149

464

437

Operating income

715

641

1,228

1,090

CECONY - Gas [Member]

Operating revenues

204

183

1,126

1,259

Inter-segment revenues

Depreciation and amortization

Operating income

(16)

(28)

243

223

CECONY - Steam [Member]

Operating revenues

487

521

Inter-segment revenues

Depreciation and amortization

Operating income

(33)

(34)

O&R - Electric [Member]

Operating revenues

245

209

559

499

Inter-segment revenues

Depreciation and amortization

Operating income

O&R - Gas [Member]

Operating revenues

150

171

Inter-segment revenues

Depreciation and amortization

Operating income

(4)

(5)

Competitive Energy Businesses [Member]

Operating revenues

584

610

1,491

1,477

Inter-segment revenues

(1)

Depreciation and amortization

Operating income

(8)

Other Revenues and Eliminations in Segment Information [Member]

Operating revenues

(12)

^[1]

(11)

^[1]

(30)

^[1]

(34)

^[1]

Inter-segment revenues

^[1]

(2)

^[1]

Depreciation and amortization

^[1]

Operating income

$ (1)

^[1]

$ 1

^[1]

$ (1)

^[1]

$ (2)

^[1]

[1]	Parent company expenses, primarily interest, and consolidation adjustments. Other does not represent a business segment.

Derivative Instruments and Hedging Activities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2010
Makeup of net credit exposure counterparties	$ 107
Makeup of net credit exposure primarily with commodity exchange	65
CONSOLIDATED EDISON INC [Member]
Energy supply and hedging activities credit exposure total	172
CECONY [Member]
Energy supply and hedging activities credit exposure total	$ 24

Derivative Instruments and Hedging Activities (Energy Price Hedging fair values) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2010	Dec. 31, 2009
Fair value of net derivative assets/(liabilities) - gross	$ (436)	$ (266)
Impact of netting of cash collateral	282	162
Fair value of net derivative assets/(liabilities) - net	$ (154)	$ (104)

Derivative Instruments and Hedging Activities (Fair values of the Companies' commodity derivatives) (Details) (USD $)
In Millions, unless otherwise specified

Sep. 30, 2010

Dec. 31, 2009

Fair value of derivative assets

$ 301

^[1]

$ 361

^[1]

Net asset derivatives

120

^[1]

130

^[1]

Fair value of derivative liabilities

737

^[1]

627

^[1]

Net liability derivatives

274

^[1]

234

^[1]

Asset Derivatives [Member]

Impact of netting

(181)

^[1]

(231)

^[1]

Asset Derivatives [Member] | Other Current Assets [Member]

Fair value of derivative assets

234

^[1]

Asset Derivatives [Member] | Fair Value of Derivative Assets, Current [Member]

Fair value of derivative assets

213

^[1]

Asset Derivatives [Member] | Other Deferred Charges and Non-current Assets [Member]

Fair value of derivative assets

^[1]

148

^[1]

Liability Derivative [Member]

Impact of netting

(463)

^[1]

(393)

^[1]

Liability Derivative [Member] | Fair Value of Derivative Liabilities, Current [Member]

Fair value of derivative liabilities

538

^[1]

401

^[1]

Liability Derivative [Member] | Other Current Liabilities [Member]

Fair value of derivative liabilities

^[1]

Liability Derivative [Member] | Fair Value of Derivative Liabilities, Long Term [Member]

Fair value of derivative liabilities

$ 199

^[1]

$ 226

^[1]

[1]	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.

Derivative Instruments and Hedging Activities (Changes in the fair values of commodity derivatives) (Details) (USD $)
In Millions, unless otherwise specified

3 Months Ended

9 Months Ended

Sep. 30, 2010

Sep. 30, 2009

Sep. 30, 2010

Sep. 30, 2009

Deferred gain/(loss), liability

$ (3)

^[1]

$ 6

^[1]

$ (8)

^[1]

$ (6)

^[1]

Deferred gain/(loss), asset

(127)

^[1]

(18)

^[1]

(351)

^[1]

(318)

^[1]

Net derferred gain/(loss)

(130)

^[1]

(12)

^[1]

(359)

^[1]

(324)

^[1]

Derivative instruments gain/(loss) recognized in income, net

(23)

^[1]

(158)

^[1]

(118)

^[1]

(444)

^[1]

Unrealized gain (loss) on derivatives

Purchased Power Expense [Member]

Derivative instruments gain/(loss) recognized in income, net

(26)

^[1],[2]

(176)

^[1]

(132)

^[1]

(432)

^[1]

Unrealized gain (loss) on derivatives

(34)

Gas Purchased for Resale [Member]

Derivative instruments gain/(loss) recognized in income, net

(1)

^[1]

(9)

^[1]

(7)

^[1]

(7)

^[1]

Non-utility Revenue [Member]

Derivative instruments gain/(loss) recognized in income, net

^[1],[2]

^[1],[3]

^[1],[4]

(5)

^[1],[5]

Unrealized gain (loss) on derivatives

(3)

(1)

Other Current Assets [Member]

Deferred gain/(loss), asset

(61)

^[1]

(127)

^[1]

Deferred Derivative Gains [Member]

Deferred gain/(loss), liability

^[1]

(9)

^[1]

Regulatory Liabilities, Long Term [Member]

Deferred gain/(loss), liability

^[1]

Other Current Liabilities [Member]

Deferred gain/(loss), liability

(8)

^[1]

Deferred Derivative Losses [Member]

Deferred gain/(loss), asset

111

^[1]

136

^[1]

Recoverable Energy Costs [Member]

Deferred gain/(loss), asset

(70)

^[1]

(158)

^[1]

(205)

^[1]

(462)

^[1]

Regulatory Assets, Long Term [Member]

Deferred gain/(loss), asset

$ 4

^[1]

$ 29

^[1]

$ (19)

^[1]

$ 8

^[1]

[1]	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.
[2]	For the three months ended September 30, 2010, Con Edison recorded in non-utility operating revenues and purchased power expense an unrealized pre-tax gain/(loss) of $(3)million and $(34) million, respectively.
[3]	For the three months ended September 30, 2009, Con Edison recorded in non-utility operating revenues an unrealized pre-tax gain of $28 million.
[4]	For the nine months ended September 30, 2010, Con Edison recorded in non-utility operating revenues and purchased power expense an unrealized pre-tax gain/(loss) of $(1) million and $(34) million, respectively.
[5]	For the nine months ended September 30, 2009, Con Edison recorded in non-utility operating revenues an unrealized pre-tax gain of $2 million.

Derivative Instruments and Hedging Activities (Number of Derivative Contracts by Commodity Type) (Details)

9 Months Ended

Sep. 30, 2010

Number of Contracts considered to be considered derivatives

1,475

^[1]

Description Of Derivative Activity Volume Electric Derivatives [Member]

Number of Energy Contracts

690

^[1]

MWHS

18,268,063

^[2]

Number of Capacity Contracts

^[1]

MWs

9,075

^[2]

Description Of Derivative Activity Volume Gas Derivatives [Member]

Number of Energy Contracts

722

^[1]

Dths

141,570,000

^[2]

[1]	Qualifying derivative contracts, which have been designated as normal purchases or normal sales contracts, are not reported at fair value under the accounting rules for derivatives and hedging and, therefore, are excluded from the table.
[2]	Volumes are reported net of long and short positions.

Derivative Instruments and Hedging Activities (Aggregate Fair Value of all Derivative Instruments with Credit Risk Related Contingent Features) (Details) (USD $)
In Millions, unless otherwise specified

Sep. 30, 2010

Aggregate fair value - net liabilities

$ 443

^[1]

Collateral posted

240

^[1]

Additional Collateral Aggregate Fair Value Down One Level [Member]

Additional collateral

^[1],[2],[3]

Additional Collateral Aggregate Fair Value Down Below Investment Grade [Member]

Additional collateral

$ 324

^{[1],[2],[3],[4]}

[1]	Non-derivative transactions for the purchase and sale of electricity and gas and qualifying derivative instruments, which 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 and Con Edison's competitive energy businesses were no longer extended unsecured credit for such purchases, the Companies would be required to post collateral, which at September 30, 2010, would have amounted to an estimated $191 million for Con Edison, including $50 million for CECONY. 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.
[2]	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 liabilities 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 of setoff.
[3]	The current ratings are Moody's, S&P and Fitch long-term credit rating of, as applicable, Con Edison (Baa1/BBB+/BBB+), CECONY (A3/A-/A-) or O&R (Baa1/A-/A-). Credit ratings assigned by rating agencies are expressions of opinions that are subject to revision or withdrawal at any time by the assigning rating agency.
[4]	Derivative instruments that are net assets have been excluded from the table. At September 30, 2010, if Con Edison had been downgraded to below investment grade, it would have been required to post additional collateral for such derivative instruments of not more than $20 million.

Fair Value Measurements (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2010	Sep. 30, 2009
Fair Value Gain Loss Included In Non Utility Revenue [Member]
Competitive energy businesses, realized and unrealized gains and losses on level 3 commodity derivative assets and liabilities, included in non-utility revenues and purchased power costs	$ 14	$ (68)	$ 47	$ (121)
Fair Value Gain Loss Included In Purchased Power Costs [Member]
Competitive energy businesses, realized and unrealized gains and losses on level 3 commodity derivative assets and liabilities, included in non-utility revenues and purchased power costs	(33)		(73)	(2)
Fair Value Change Included In Non Utility Revenue [Member]
Change in unrealized gain (loss) on fair value hedging instruments	(3)	(15)	(2)	(15)
Fair Value Change Included In Purchased Power Costs [Member]
Change in unrealized gain (loss) on fair value hedging instruments	$ (22)		$ (29)

Fair Value Measurements (Assets and liabilities measured at fair value on a recurring basis) (Details) (USD $)
In Millions, unless otherwise specified

Sep. 30, 2010

Dec. 31, 2009

Derivative assets

$ 274

$ 258

Derivative liabilities

287

245

Fair Value, Inputs, Level 1 [Member]

Derivative assets

Derivative liabilities

Fair Value, Inputs, Level 2 [Member]

Derivative assets

Derivative liabilities

358

296

Fair Value, Inputs, Level 3 [Member]

Derivative assets

308

293

Derivative liabilities

368

271

Fair Value, Concentration of Credit Risk, Master Netting Arrangements [Member]

Derivative assets

(167)

(166)

Derivative liabilities

(449)

(328)

Fair Value Commodity [Member]

Derivative assets

121

Derivative liabilities

275

Transfers in

(20)

^[1],[2]

Transfers out

^[1],[2]

Fair Value Commodity [Member] | Fair Value, Inputs, Level 1 [Member]

Derivative assets

Derivative liabilities

Transfers in

^[1],[2]

Transfers out

^[1],[2]

Fair Value Commodity [Member] | Fair Value, Inputs, Level 2 [Member]

Derivative assets

Derivative liabilities

356

Transfers in

(9)

^[1],[2]

Transfers out

^[1],[2]

Fair Value Commodity [Member] | Fair Value, Inputs, Level 3 [Member]

Derivative assets

212

Derivative liabilities

358

Transfers in

(11)

^[1],[2]

Transfers out

^[1],[2]

Fair Value Commodity [Member] | Fair Value, Concentration of Credit Risk, Master Netting Arrangements [Member]

Derivative assets

(167)

Derivative liabilities

(449)

Transfers in

^[1],[2]

Transfers out

^[1],[2]

Fair Value Commodity After Transfers [Member]

Derivative assets

121

^[3]

130

^[4]

Derivative liabilities

275

^[3]

234

^[4]

Fair Value Commodity After Transfers [Member] | Fair Value, Inputs, Level 1 [Member]

Derivative assets

^[3]

^[4]

Derivative liabilities

^[3]

^[4]

Fair Value Commodity After Transfers [Member] | Fair Value, Inputs, Level 2 [Member]

Derivative assets

^[3]

^[4]

Derivative liabilities

358

^[3]

296

^[4]

Fair Value Commodity After Transfers [Member] | Fair Value, Inputs, Level 3 [Member]

Derivative assets

212

^[3]

201

^[4]

Derivative liabilities

356

^[3]

260

^[4]

Fair Value Commodity After Transfers [Member] | Fair Value, Concentration of Credit Risk, Master Netting Arrangements [Member]

Derivative assets

(167)

^[3]

(166)

^[4]

Derivative liabilities

(449)

^[3]

(328)

^[4]

Fair Value Interest Rate Contract [Member]

Derivative liabilities

^[5]

^[6]

Fair Value Interest Rate Contract [Member] | Fair Value, Inputs, Level 1 [Member]

Derivative liabilities

^[5]

Fair Value Interest Rate Contract [Member] | Fair Value, Inputs, Level 2 [Member]

Derivative liabilities

^[5]

Fair Value Interest Rate Contract [Member] | Fair Value, Inputs, Level 3 [Member]

Derivative liabilities

^[5]

^[6]

Fair Value Interest Rate Contract [Member] | Fair Value, Concentration of Credit Risk, Master Netting Arrangements [Member]

Derivative liabilities

^[5]

Fair Value Other Derivative [Member]

Derivative assets

153

^[7]

128

^[7]

Fair Value Other Derivative [Member] | Fair Value, Inputs, Level 1 [Member]

Derivative assets

^[7]

Fair Value Other Derivative [Member] | Fair Value, Inputs, Level 2 [Member]

Derivative assets

^[7]

Fair Value Other Derivative [Member] | Fair Value, Inputs, Level 3 [Member]

Derivative assets

^[7]

Fair Value Other Derivative [Member] | Fair Value, Concentration of Credit Risk, Master Netting Arrangements [Member]

Derivative assets

^[7]

[1]	The Companies' policy is to recognize transfers into and transfers out of the levels at the end of the reporting period.
[2]	Transferred from Level 3 to Level 2 because of availability of observable market data due to decrease in the terms of certain contracts from beyond one year as of June 30, 2010 to less than one year as of September 30, 2010.
[3]	A significant portion of the commodity derivative contracts categorized in Level 3 is valued using either an industry acceptable model or an internally developed model with observable inputs. The models also include some less readily observable inputs resulting in the classification of the entire contract as Level 3. See Note K.
[4]	A significant portion of the commodity derivative contracts categorized in Level 3 is valued using either an industry acceptable model or an internally developed model with observable inputs. The models also include some less readily observable inputs resulting in the classification of the entire contract as Level 3. See Note O to the financial statements in Item 8 of the Form 10-K.
[5]	See Note K.
[6]	See Note O to the financial statements in Item 8 of the Form 10-K.
[7]	Other assets are comprised of assets such as life insurance contracts within the Deferred Income Plan and Supplemental Retirement Income Plans, held in rabbi trusts.

Fair Value Measurements (Reconciliation of the beginning and ending net balances for assets and liabilities measured at Level 3 fair value) (Details) (USD $)
In Millions, unless otherwise specified

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2010

Sep. 30, 2009

Sep. 30, 2010

Sep. 30, 2009

Sep. 30, 2010

Fair Value Commodity [Member]

Sep. 30, 2010

Fair Value Commodity [Member]

Sep. 30, 2010

Fair Value Interest Rate Contract [Member]

Jun. 30, 2010

Fair Value Interest Rate Contract [Member]

Sep. 30, 2010

Fair Value Other Derivative [Member]

Sep. 30, 2010

Fair Value Other Derivative [Member]

Sep. 30, 2009

Energy [Member]

Sep. 30, 2009

Energy [Member]

Sep. 30, 2009

Financial & other [Member]

Jun. 30, 2009

Financial & other [Member]

Sep. 30, 2009

Fair Value Other [Member]

Sep. 30, 2009

Fair Value Other [Member]

Beginning Balance

$ (19)

$ (15)

$ 22

$ 8

$ (101)

$ (59)

$ (11)

$ (12)

$ 94

^[1]

$ 92

^[1]

$ (85)

$ (50)

$ (15)

$ (12)

$ 82

$ 73

Included in Earnings

(45)

(105)

(97)

(207)

(45)

(95)

(2)

(108)

(213)

Included in Regulatory Assets and Liabilities

(10)

(52)

(12)

(55)

(1)

^[1]

Purchases, Issuances, Sales and Settlements

202

Transfers In/Out of Level 3

(2)

(1)

(2)

(1)

Ending Balance

$ (60)

$ 19

$ (60)

$ 19

$ (144)

$ (12)

$ 96

^[1]

$ 96

^[1]

$ (57)

$ (12)

$ 88

[1]	Amounts included in earnings are reported in investment and other income on the consolidated income statement.

Pension Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended				3 Months Ended
	Sep. 30, 2010 Defined Benefit Pension [Member] CONSOLIDATED EDISON INC [Member]	Sep. 30, 2009 Defined Benefit Pension [Member] CONSOLIDATED EDISON INC [Member]	Sep. 30, 2010 Defined Benefit Pension [Member] CECONY [Member]	Sep. 30, 2009 Defined Benefit Pension [Member] CECONY [Member]	Jun. 30, 2010 Other Nonqualified Supplemental Defined Benefit Pension [Member]
Expected discretionary contributions to pension plan	$ 434	$ 282	$ 397	$ 244	$ 25