Document And Entity Information	9 Months Ended
Document And Entity Information	Sep. 30, 2011	Oct. 28, 2011
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2011
Document Fiscal Year Focus	2011
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		292,904,646
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, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
OPERATING REVENUES
Electric	$ 2,861	$ 2,814	$ 6,883	$ 6,959
Gas	220	229	1,309	1,276
Steam	76	91	508	487
Non-utility	472	573	1,272	1,463
TOTAL OPERATING REVENUES	3,629	3,707	9,972	10,185
OPERATING EXPENSES
Purchased power	1,239	1,425	3,124	3,708
Fuel	73	106	317	342
Gas purchased for resale	73	73	491	482
Other operations and maintenance	783	738	2,213	2,117
Depreciation and amortization	222	211	659	626
Taxes, other than income taxes	483	449	1,387	1,283
TOTAL OPERATING EXPENSES	2,873	3,002	8,191	8,558
OPERATING INCOME	756	705	1,781	1,627
OTHER INCOME (DEDUCTIONS)
Investment and other income		9	19	29
Allowance for equity funds used during construction	2	4	8	13
Other deductions	(3)	(3)	(14)	(12)
TOTAL OTHER INCOME (DEDUCTIONS)	(1)	10	13	30
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	755	715	1,794	1,657
INTEREST EXPENSE
Interest on long-term debt	145	152	437	450
Other interest		7	15	13
Allowance for borrowed funds used during construction	(1)	(2)	(4)	(7)
NET INTEREST EXPENSE	144	157	448	456
INCOME BEFORE INCOME TAX EXPENSE	611	558	1,346	1,201
INCOME TAX EXPENSE	225	205	477	433
NET INCOME	386	353	869	768
Preferred stock dividend requirements of subsidiary	(3)	(3)	(9)	(9)
NET INCOME FOR COMMON STOCK	383	350	860	759
Net income for common stock per common share - basic	$ 1.31	$ 1.24	$ 2.94	$ 2.69
Net income for common stock per common share - diluted	$ 1.30	$ 1.23	$ 2.92	$ 2.68
DIVIDENDS DECLARED PER SHARE OF COMMON STOCK	$ 0.600	$ 0.595	$ 1.800	$ 1.785
AVERAGE NUMBER OF SHARES OUTSTANDING - BASIC (IN MILLIONS)	292.9	283.0	292.5	282.2
AVERAGE NUMBER OF SHARES OUTSTANDING - DILUTED (IN MILLIONS)	294.6	284.6	294.2	283.7
CECONY [Member]
OPERATING REVENUES
Electric	2,644	2,570	6,378	6,402
Gas	197	204	1,156	1,126
Steam	76	91	508	487
TOTAL OPERATING REVENUES	2,917	2,865	8,042	8,015
OPERATING EXPENSES
Purchased power	736	764	1,840	2,102
Fuel	73	105	317	343
Gas purchased for resale	57	63	412	408
Other operations and maintenance	678	637	1,906	1,832
Depreciation and amortization	209	198	618	586
Taxes, other than income taxes	462	432	1,330	1,232
TOTAL OPERATING EXPENSES	2,215	2,199	6,423	6,503
OPERATING INCOME	702	666	1,619	1,512
OTHER INCOME (DEDUCTIONS)
Investment and other income	(6)	5	3	23
Allowance for equity funds used during construction	1	3	6	10
Other deductions	(3)	(2)	(12)	(11)
TOTAL OTHER INCOME (DEDUCTIONS)	(8)	6	(3)	22
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	694	672	1,616	1,534
INTEREST EXPENSE
Interest on long-term debt	130	137	393	406
Other interest	4	5	13	13
Allowance for borrowed funds used during construction	(1)	(1)	(3)	(6)
NET INTEREST EXPENSE	133	141	403	413
INCOME BEFORE INCOME TAX EXPENSE	561	531	1,213	1,121
INCOME TAX EXPENSE	205	196	425	404
NET INCOME	356	335	788	717
Preferred stock dividend requirements of subsidiary	(3)	(3)	(9)	(8)
NET INCOME FOR COMMON STOCK	$ 353	$ 332	$ 779	$ 709

Consolidated Statement Of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
OPERATING ACTIVITIES
Net Income	$ 869	$ 768
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	659	626
Deferred income taxes	368	562
Common equity component of allowance for funds used during construction	(8)	(13)
Net derivative (gains)/losses	(25)	35
Other non-cash items (net)	45	(8)
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable - customers, less allowance for uncollectibles	(4)	(114)
Materials and supplies, including fuel oil and gas in storage	(27)	(9)
Other receivables and other current assets	70	(114)
Prepayments	(128)	(473)
Accounts payable	(50)	(105)
Pensions and retiree benefits	(1)	(33)
Accrued taxes	76	63
Accrued interest	57	45
Deferred charges, deferred derivative losses, noncurrent assets and other regulatory assets	92	(472)
Deferred credits and other regulatory liabilities	158	142
Other assets		(8)
Other liabilities	10	82
NET CASH FLOWS FROM OPERATING ACTIVITIES	2,161	974
INVESTING ACTIVITIES
Utility construction expenditures	(1,412)	(1,455)
Cost of removal less salvage	(123)	(103)
Non-utility construction expenditures	(57)	(6)
Proceeds from investment tax credits and grants related to renewable energy investments	4
Net investment in Pilesgrove solar project	(31)	(3)
Common equity component of allowance for funds used during construction	8	13
Purchase of additional ownership interest in Honeoye Storage Corporation		(12)
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(1,611)	(1,566)
FINANCING ACTIVITIES
Net proceeds from short-term debt		846
Issuance of long-term debt		870
Retirement of long-term debt	(3)	(781)
Issuance of common stock	81	78
Repurchase of common stock	(40)
Debt issuance costs		(6)
Common stock dividends	(519)	(468)
Preferred stock dividends	(9)	(9)
NET CASH FLOWS (USED IN)/FROM FINANCING ACTIVITIES	(490)	530
CASH AND TEMPORARY CASH INVESTMENTS:
NET CHANGE FOR THE PERIOD	60	(62)
BALANCE AT BEGINNING OF PERIOD	338	260
BALANCE AT END OF PERIOD	398	198
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest	371	394
Income taxes	(132)	284
CECONY [Member]
OPERATING ACTIVITIES
Net Income	788	717
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	618	586
Deferred income taxes	309	562
Common equity component of allowance for funds used during construction	(6)	(10)
Other non-cash items (net)	98	(88)
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable - customers, less allowance for uncollectibles	3	(84)
Materials and supplies, including fuel oil and gas in storage	2	(9)
Other receivables and other current assets	243	(208)
Prepayments	(303)	(309)
Accounts payable	(45)	(96)
Pensions and retiree benefits	(5)	(30)
Accrued taxes	(7)	20
Accrued interest	46	37
Deferred charges, deferred derivative losses, noncurrent assets and other regulatory assets	33	(374)
Deferred credits and other regulatory liabilities	167	131
Other liabilities	19	93
NET CASH FLOWS FROM OPERATING ACTIVITIES	1,960	938
INVESTING ACTIVITIES
Utility construction expenditures	(1,338)	(1,371)
Cost of removal less salvage	(118)	(100)
Common equity component of allowance for funds used during construction	6	10
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(1,450)	(1,461)
FINANCING ACTIVITIES
Net proceeds from short-term debt		832
Issuance of long-term debt		700
Retirement of long-term debt		(625)
Debt issuance costs		(6)
Capital contribution by parent		36
Dividend to parent	(509)	(502)
Preferred stock dividends	(9)	(8)
NET CASH FLOWS (USED IN)/FROM FINANCING ACTIVITIES	(518)	427
CASH AND TEMPORARY CASH INVESTMENTS:
NET CHANGE FOR THE PERIOD	(8)	(96)
BALANCE AT BEGINNING OF PERIOD	78	131
BALANCE AT END OF PERIOD	70	35
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest	336	357
Income taxes	$ (103)	$ 263

Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Sep. 30, 2011	Dec. 31, 2010
CURRENT ASSETS
Cash and temporary cash investments	$ 398	$ 338
Accounts receivable - customers, less allowance for uncollectible accounts	1,177	1,173
Accrued unbilled revenue	479	633
Other receivables, less allowance for uncollectible accounts	297	293
Fuel oil, gas in storage, materials and supplies, at average cost	375	348
Prepayments	469	341
Regulatory assets	110	203
Other current assets	153	178
TOTAL CURRENT ASSETS	3,458	3,507
INVESTMENTS	474	403
UTILITY PLANT, AT ORIGINAL COST
General	1,907	1,911
TOTAL	29,147	28,144
Less: Accumulated depreciation	5,961	5,808
Net	23,186	22,336
Construction work in progress	1,404	1,458
NET UTILITY PLANT	24,590	23,794
NON-UTILITY PLANT
Non-utility property, less accumulated depreciation	47	46
Construction work in progress	61	23
NET PLANT	24,698	23,863
OTHER NONCURRENT ASSETS
Goodwill	429	429
Intangible assets, less accumulated amortization of $3 in 2011 and 2010	3	3
Regulatory assets	7,206	7,683
Other deferred charges and noncurrent assets	267	298
TOTAL OTHER NONCURRENT ASSETS	7,905	8,413
TOTAL ASSETS	36,535	36,186
CURRENT LIABILITIES
Long-term debt due within one year	305	5
Accounts payable	1,062	1,151
Customer deposits	302	289
Accrued taxes	166	90
Accrued interest	212	155
Accrued wages	94	102
Fair value of derivative liabilities	101	125
Regulatory liabilities	257	295
Other current liabilities	460	459
TOTAL CURRENT LIABILITIES	2,959	2,671
NONCURRENT LIABILITIES
Obligations under capital leases	2	7
Provision for injuries and damages	180	165
Pensions and retiree benefits	2,600	3,287
Superfund and other environmental costs	496	512
Asset retirement obligations	114	109
Fair value of derivative liabilities	30	77
Other noncurrent liabilities	118	113
TOTAL NONCURRENT LIABILITIES	3,540	4,270
DEFERRED CREDITS AND REGULATORY LIABILITIES
Deferred income taxes and investment tax credits	7,110	6,602
Regulatory liabilities	821	652
Other deferred credits	69	46
TOTAL DEFERRED CREDITS AND REGULATORY LIABILITIES	8,000	7,300
LONG-TERM DEBT	10,369	10,671
SHAREHOLDER'S EQUITY
Common shareholders' equity (See Statement of Shareholders' Equity)	11,454	11,061
Preferred stock of subsidiary	213	213
TOTAL SHAREHOLDER'S EQUITY	11,667	11,274
TOTAL LIABILITIES AND SHAREHOLDER'S EQUITY	36,535	36,186
CECONY [Member]
CURRENT ASSETS
Cash and temporary cash investments	70	78
Accounts receivable - customers, less allowance for uncollectible accounts	1,022	1,025
Accrued unbilled revenue	358	473
Other receivables, less allowance for uncollectible accounts	82	73
Accounts receivable from affiliated companies	24	273
Fuel oil, gas in storage, materials and supplies, at average cost	304	306
Prepayments	385	82
Regulatory assets	90	151
Other current assets	90	104
TOTAL CURRENT ASSETS	2,425	2,565
INVESTMENTS	178	167
UTILITY PLANT, AT ORIGINAL COST
General	1,736	1,746
TOTAL	27,255	26,363
Less: Accumulated depreciation	5,443	5,314
Net	21,812	21,049
Construction work in progress	1,333	1,345
NET UTILITY PLANT	23,145	22,394
NON-UTILITY PLANT
Non-utility property, less accumulated depreciation	6	7
NET PLANT	23,151	22,401
OTHER NONCURRENT ASSETS
Regulatory assets	6,668	7,097
Other deferred charges and noncurrent assets	232	244
TOTAL OTHER NONCURRENT ASSETS	6,900	7,341
TOTAL ASSETS	32,654	32,474
CURRENT LIABILITIES
Long-term debt due within one year	300
Accounts payable	836	924
Accounts payable to affiliated companies	15	13
Customer deposits	289	276
Accrued taxes	27	34
Accrued taxes to affiliated companies	29	29
Accrued interest	176	130
Accrued wages	91	93
Fair value of derivative liabilities	51	71
Regulatory liabilities	230	267
Other current liabilities	407	400
TOTAL CURRENT LIABILITIES	2,451	2,237
NONCURRENT LIABILITIES
Obligations under capital leases	2	7
Provision for injuries and damages	173	159
Pensions and retiree benefits	2,259	2,900
Superfund and other environmental costs	377	392
Asset retirement obligations	114	109
Fair value of derivative liabilities	9	29
Other noncurrent liabilities	110	102
TOTAL NONCURRENT LIABILITIES	3,044	3,698
DEFERRED CREDITS AND REGULATORY LIABILITIES
Deferred income taxes and investment tax credits	6,539	6,071
Regulatory liabilities	706	547
Other deferred credits	65	42
TOTAL DEFERRED CREDITS AND REGULATORY LIABILITIES	7,310	6,660
LONG-TERM DEBT	9,444	9,743
SHAREHOLDER'S EQUITY
Common shareholders' equity (See Statement of Shareholders' Equity)	10,192	9,923
Preferred stock of subsidiary	213	213
TOTAL SHAREHOLDER'S EQUITY	10,405	10,136
TOTAL LIABILITIES AND SHAREHOLDER'S EQUITY	32,654	32,474
Steam Plant [Member]
UTILITY PLANT, AT ORIGINAL COST
Utility plant, at original cost	1,960	2,038
Steam Plant [Member] \| CECONY [Member]
UTILITY PLANT, AT ORIGINAL COST
Utility plant, at original cost	1,960	2,038
Electric Transmission [Member]
UTILITY PLANT, AT ORIGINAL COST
Utility plant, at original cost	20,714	19,851
Electric Transmission [Member] \| CECONY [Member]
UTILITY PLANT, AT ORIGINAL COST
Utility plant, at original cost	19,508	18,735
Gas Transmission [Member]
UTILITY PLANT, AT ORIGINAL COST
Utility plant, at original cost	4,566	4,344
Gas Transmission [Member] \| CECONY [Member]
UTILITY PLANT, AT ORIGINAL COST
Utility plant, at original cost	$ 4,051	$ 3,844

Consolidated Balance Sheet (Parenthetical) (USD $) In Millions, unless otherwise specified	Sep. 30, 2011	Dec. 31, 2010
Accounts receivable - customers, allowance for uncollectible accounts	$ 88	$ 76
Other receivables, allowance for uncollectible accounts	9	8
Non-utility property, accumulated depreciation	57	51
Intangible assets, accumulated amortization	3	3
CECONY [Member]
Accounts receivable - customers, allowance for uncollectible accounts	80	68
Other receivables, allowance for uncollectible accounts	8	7
Non-utility property, accumulated depreciation	$ 23	$ 22

- Definition

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

+ References+ Details

Consolidated Statement Of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
NET INCOME	$ 386	$ 353	$ 869	$ 768
OTHER COMPREHENSIVE INCOME, NET OF TAXES
Pension plan liability adjustments	2	1	7	5
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAXES	2	1	7	5
COMPREHENSIVE INCOME	388	354	876	773
Preferred stock dividend requirements of subsidiary	(3)	(3)	(9)	(9)
COMPREHENSIVE INCOME FOR COMMON STOCK	385	351	867	764
CECONY [Member]
NET INCOME	356	335	788	717
OTHER COMPREHENSIVE INCOME, NET OF TAXES
Preferred stock dividend requirements of subsidiary	$ (3)	$ (3)	$ (9)	$ (8)

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 8, 9, 10, 11, 12, 13, 14

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 30

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph A5

-Appendix A

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e557-108580

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Net Income

-URI http://asc.fasb.org/extlink&oid=6518256

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Other Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=6519514

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e540-108580

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=6508144

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

-Subparagraph c(3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e565-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-04.22)

-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph A7

-Appendix A

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.18)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-04.19)

-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 87-21

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

-Paragraph 10, 15

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28, 29, 30

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 19

Reference 12: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 20

-Article 9

Reference 13: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

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Reference 14: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Net Income

-URI http://asc.fasb.org/extlink&oid=6518256

Reference 15: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Other Comprehensive Income

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Reference 16: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Topic 260

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-Paragraph 1

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+ Details

- Definition

The increase (decrease) in accumulated comprehensive income during the period related to pension and other postretirement benefit plans, after tax. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

+ References+ Details

- Definition

This element represents Other Comprehensive Income or Loss, Net of Tax, for the period. Includes deferred gains or losses on qualifying hedges, unrealized holding gains or losses on available-for-sale securities, minimum pension liability, and cumulative translation adjustment. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 31

-Article 5

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-Publisher SEC

-Name Regulation S-X (SX)

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-Article 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

-Paragraph 22, 23, 24, 25

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e599-108580

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

-Subparagraph c(3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Consolidated Statement Of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statement Of Comprehensive Income [Abstract]
Pension plan liability adjustments, taxes	$ 1	$ 1	$ 4	$ 4

- Definition

Tax effects of the increase (decrease) to accumulated comprehensive income during the period related to benefit plans. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

+ References+ Details

Consolidated Statement Of Common Shareholders' Equity (USD $) In Millions, except Share data	Common Stock [Member] CECONY [Member]	Common Stock [Member]	Additional Paid-In Capital [Member] CECONY [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member] CECONY [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Repurchased Con Edison Stock [Member] CECONY [Member]	Capital Stock Expense [Member] CECONY [Member]	Capital Stock Expense [Member]	Accumulated Other Comprehensive Income/(Loss) [Member] CECONY [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	CECONY [Member]	Total
BEGINNING BALANCE at Dec. 31, 2009	$ 589	$ 30	$ 3,877	$ 4,420	$ 5,909	$ 6,904	$ (1,001)	$ (962)	$ (62)	$ (62)	$ (4)	$ (42)	$ 9,347	$ 10,249
BEGINNING BALANCE (in shares) at Dec. 31, 2009	235,488,094	281,123,741					23,210,700
Net income					246								246
Capital contribution from parent			12										12
Net income for common stock						226								226
Common stock dividends					(167)	(167)							(167)	(167)
Cumulative preferred dividends					(3)								(3)
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										28
Other comprehensive income												3		3
ENDING BALANCE at Mar. 31, 2010	589	30	3,889	4,448	5,985	6,963	(1,001)	(962)	(62)	(62)	(4)	(39)	9,435	10,339
ENDING BALANCE (in shares) at Mar. 31, 2010	235,488,094	281,771,472					23,210,700
BEGINNING BALANCE at Dec. 31, 2009	589						(1,001)	(962)	(62)	(62)	(4)		9,347	10,249
BEGINNING BALANCE (in shares) at Dec. 31, 2009	235,488,094						23,210,700
Net income													717	768
Net income for common stock													709	759
Cumulative preferred dividends													(8)	(9)
ENDING BALANCE at Sep. 30, 2010	589						(1,001)	(962)	(62)	(62)	(4)		9,591	10,630
ENDING BALANCE (in shares) at Sep. 30, 2010	235,488,094						23,210,700
BEGINNING BALANCE at Mar. 31, 2010	589	30	3,889	4,448	5,985	6,963	(1,001)	(962)	(62)	(62)	(4)	(39)	9,435	10,339
BEGINNING BALANCE (in shares) at Mar. 31, 2010	235,488,094	281,771,472					23,210,700
Net income					138								138
Capital contribution from parent			12										12
Net income for common stock						183								183
Common stock dividends					(168)	(168)							(168)	(168)
Cumulative preferred dividends					(3)								(3)
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										25
Other comprehensive income												1		1
ENDING BALANCE at Jun. 30, 2010	589	30	3,901	4,473	5,952	6,978	(1,001)	(962)	(62)	(62)	(4)	(38)	9,414	10,380
ENDING BALANCE (in shares) at Jun. 30, 2010	235,488,094	282,327,436					23,210,700
Net income					335								335	353
Capital contribution from parent			12										12
Net income for common stock						350							332	350
Common stock dividends					(167)	(168)							(167)	(168)
Cumulative preferred dividends					(3)								(3)	(3)
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		1		66										67
Other comprehensive income												1		1
ENDING BALANCE at Sep. 30, 2010	589	31	3,913	4,539	6,117	7,160	(1,001)	(962)	(62)	(62)	(4)	(37)	9,591	10,630
ENDING BALANCE (in shares) at Sep. 30, 2010	235,488,094	283,815,034					23,210,700
BEGINNING BALANCE at Dec. 31, 2010	589	31	4,234	4,915	6,132	7,220	(1,001)	(962)	(64)	(64)	(6)	(40)	9,923	11,061
BEGINNING BALANCE (in shares) at Dec. 31, 2010	235,488,094	291,616,334					23,210,700
Net income					271								271
Net income for common stock						311								311
Common stock dividends					(170)	(175)							(170)	(175)
Cumulative preferred dividends					(3)								(3)
Issuance of common shares - dividend reinvestment and employee stock plans (in shares)		656,049
Issuance of common shares - dividend reinvestment and employee stock plans		1		30										31
Other comprehensive income												3		3
ENDING BALANCE at Mar. 31, 2011	589	32	4,234	4,945	6,230	7,356		(962)	(64)	(64)	(6)	(37)	10,021	11,231
ENDING BALANCE (in shares) at Mar. 31, 2011	235,488,094	292,272,383
BEGINNING BALANCE at Dec. 31, 2010	589		4,234				(1,001)	(962)	(64)	(64)	(6)		9,923	11,061
BEGINNING BALANCE (in shares) at Dec. 31, 2010	235,488,094						23,210,700
Net income													788	869
Net income for common stock													779	860
Cumulative preferred dividends													(9)	(9)
ENDING BALANCE at Sep. 30, 2011	589		4,234					(962)	(64)	(64)	(6)		10,192	11,454
ENDING BALANCE (in shares) at Sep. 30, 2011	235,488,094
BEGINNING BALANCE at Mar. 31, 2011	589	32	4,234	4,945	6,230	7,356	(1,001)	(962)	(64)	(64)	(6)	(37)	10,021	11,231
BEGINNING BALANCE (in shares) at Mar. 31, 2011	235,488,094	292,272,383					23,210,700
Net income					160								160
Net income for common stock						165								165
Common stock dividends					(170)	(175)							(170)	(175)
Cumulative preferred dividends					(3)								(3)
Issuance of common shares - dividend reinvestment and employee stock plans (in shares)		603,513					(182,942)
Issuance of common shares - dividend reinvestment and employee stock plans				32			5							37
Common stock repurchases							(9)							(9)
Common stock repurchases, shares							178,942
Other comprehensive income												2		2
ENDING BALANCE at Jun. 30, 2011	589	32	4,234	4,977	6,217	7,346	(1,005)	(962)	(64)	(64)	(6)	(35)	10,008	11,251
ENDING BALANCE (in shares) at Jun. 30, 2011	235,488,094	292,875,896					23,206,700
Net income					356								356	386
Net income for common stock						383							353	383
Common stock dividends					(169)	(176)							(169)	(176)
Cumulative preferred dividends					(3)								(3)	(3)
Issuance of common shares - dividend reinvestment and employee stock plans (in shares)		8,000					(554,356)
Issuance of common shares - dividend reinvestment and employee stock plans				6			19							25
Common stock repurchases							(31)							(31)
Common stock repurchases, shares							546,356
Other comprehensive income												2		2
ENDING BALANCE at Sep. 30, 2011	$ 589	$ 32	$ 4,234	$ 4,983	$ 6,401	$ 7,553	$ (1,017)	$ (962)	$ (64)	$ (64)	$ (6)	$ (33)	$ 10,192	$ 11,454
ENDING BALANCE (in shares) at Sep. 30, 2011	235,488,094	292,883,896					23,198,700

General	9 Months Ended
General	Sep. 30, 2011
General	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, 2010 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, 2011 and June 30, 2011. Certain prior period amounts have been reclassified to conform to the current period presentation. 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.
CECONY [Member]
General	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, 2010 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, 2011 and June 30, 2011. Certain prior period amounts have been reclassified to conform to the current period presentation. 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, 2011

Summary Of Significant Accounting Policies

Note A — Summary of Significant Accounting Policies

Earnings Per Common Share

For the three and nine months ended September 30, 2011 and 2010, Con Edison's basic and diluted EPS for Con Edison are calculated as follows:


	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
*(Millions of Dollars, except per share amounts/Shares in Millions)*	2011		2010		2011		2010
Net income for common stock	$	383	$	350	$	860	$	759
Weighted average common shares outstanding – Basic		292.9		283.0		292.5		282.2
Add: Incremental shares attributable to effect of potentially dilutive securities		1.7		1.6		1.7		1.5
Adjusted weighted average common shares outstanding – Diluted		294.6		284.6		294.2		283.7
Net income for common stock per common share – basic	$	1.31	$	1.24	$	2.94	$	2.69
Net income for common stock per common share – diluted	$	1.30	$	1.23	$	2.92	$	2.68

CECONY [Member]

Summary Of Significant Accounting Policies

Note A — Summary of Significant Accounting Policies

Earnings Per Common Share

For the three and nine months ended September 30, 2011 and 2010, Con Edison's basic and diluted EPS for Con Edison are calculated as follows:


	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
*(Millions of Dollars, except per share amounts/Shares in Millions)*	2011		2010		2011		2010
Net income for common stock	$	383	$	350	$	860	$	759
Weighted average common shares outstanding – Basic		292.9		283.0		292.5		282.2
Add: Incremental shares attributable to effect of potentially dilutive securities		1.7		1.6		1.7		1.5
Adjusted weighted average common shares outstanding – Diluted		294.6		284.6		294.2		283.7
Net income for common stock per common share – basic	$	1.31	$	1.24	$	2.94	$	2.69
Net income for common stock per common share – diluted	$	1.30	$	1.23	$	2.92	$	2.68

- Definition

The entire disclosure for all significant accounting policies of the reporting entity.

+ References+ Details

Regulatory Matters

9 Months Ended

Sep. 30, 2011

Regulatory Matters

Note B — Regulatory Matters

Rate Agreements

O&R — Electric

In June 2011, the NYSPSC adopted an order granting O&R an electric rate increase, effective July 1, 2011, of $26.6 million. The NYSPSC ruling reflects the following major items:

•

a weighted average cost of capital of 7.22 percent, reflecting:

•

a return on common equity of 9.2 percent, assuming achievement by the company of $825,000 of austerity measures;

•

cost of long-term debt of 5.50 percent; and

•

common equity ratio of 48 percent.

•

continuation of a revenue decoupling mechanism;

•

a provision for reconciliation of certain differences in actual average net utility plant to the amount reflected in rates ($718 million) and continuation of rate provisions under which pension and other post-retirement benefit expenses, environmental remediation expenses, tax-exempt debt costs and certain other expenses are reconciled to amounts for those expenses reflected in rates;

•

continuation of the rate provisions pursuant to which the company recovers its purchased power costs from customers;

•

discontinuation of the provisions under which property taxes were reconciled to amounts reflected in rates;

•

discontinuation of the inclusion in rates of funding for the company's annual incentive plan for non-officer management employees;

•

continuation of provisions for potential operations penalties of up to $3 million annually if certain customer service and system reliability performance targets are not met; and

•

O&R is directed to produce a report detailing its implementation plans for the recommendations made in connection with the NYSPSC's management audit of CECONY, with a forecast of costs to achieve and expected savings.

On July 29, 2011, O&R filed a request with the NYSPSC for an increase in the rates it charges for electric service rendered in New York, effective July 1, 2012, of $17.7 million. The filing reflects a return on common equity of 10.75 percent and a common equity ratio of 49.4 percent. Among other things, the filing proposes continuation of the current provisions with respect to recovery from customers of the cost of purchased power and with respect to the deferral of differences between actual expenses allocable to the electric business for pensions and other postretirement benefits, environmental, and research and developmental costs to the amounts for such costs reflected in electric rates. The filing also includes an alternative proposal for a three-year electric rate plan with annual rate increases of $17.6 million effective July 2012, 2013 and 2014. The multi-year filing reflects a return on common equity of 11.25 percent.

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 G). Pursuant to NYSPSC orders, a portion of the company's revenues (currently, $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, 2011, the company had collected an estimated $753 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. At September 30, 2011, the company had a $10.5 million regulatory liability relating to this matter. The company is unable to estimate the amount, if any, by which any refund required by the NYSPSC may exceed this regulatory liability.

In February 2011, the NYSPSC initiated a proceeding to examine the existing mechanisms pursuant to which utilities recover site investigation and remediation costs and possible alternatives. See Note F to the Third Quarter Financial Statements.

Regulatory Assets and Liabilities

Regulatory assets and liabilities at September 30, 2011 and December 31, 2010 were comprised of the following items:


	Con Edison				CECONY
*(Millions of Dollars)*	2011		2010		2011		2010
Regulatory assets
Unrecognized pension and other postretirement costs	$	3,769	$	4,371	$	3,584	$	4,152
Future federal income tax		1,763		1,593		1,688		1,515
Environmental remediation costs		681		695		563		574
Pension and other post retirement benefits deferrals		198		138		156		90
Revenue taxes		160		145		155		140
Surcharge for New York State assessment		150		121		138		112
Net electric deferrals		126		156		126		156
Deferred storm costs		81		57		61		43
O&R transition bond charges		45		48		—		—
Deferred derivative losses – long-term		34		74		21		48
Workers' compensation		25		31		24		31
Accrued unbilled revenues		22		—		22		—
Property tax reconciliation		12		34		—		27
World Trade Center restoration costs		9		45		9		45
Recoverable energy cost		2		42		2		42
Other		129		133		119		122
Regulatory assets – long-term		7,206		7,683		6,668		7,097
Deferred derivative losses – current		110		190		90		151
Recoverable energy costs – current		—		13		—		—
Regulatory assets – current		110		203		90		151
Total Regulatory Assets	$	7,316	$	7,886	$	6,758	$	7,248
Regulatory liabilities
Allowance for cost of removal less salvage	$	440	$	422	$	365	$	350
World Trade Center settlement proceeds		62		—		62		—
Carrying charges on transmission and distribution net plant		39		28		12		5
Bonus depreciation		24		1		23		1
Energy efficiency programs		23		12		21		11
Gas line losses		21		—		21		—
New York State tax refund		20		30		20		30
Gain on sale of properties		14		28		14		28
Expenditure prudence proceeding		11		—		11		—
Other		167		131		157		122
Regulatory liabilities – long-term		821		652		706		547
Net unbilled revenue deferrals – current		116		136		115		135
Revenue decoupling mechanism		99		38		99		38
Refundable energy cost – current		38		117		13		91
Deferred derivative gains – current		4		4		3		3
Regulatory liabilities – current		257		295		230		267
Total Regulatory Liabilities	$	1,078	$	947	$	936	$	814

CECONY [Member]

Regulatory Matters

Note B — Regulatory Matters

Rate Agreements

O&R — Electric

In June 2011, the NYSPSC adopted an order granting O&R an electric rate increase, effective July 1, 2011, of $26.6 million. The NYSPSC ruling reflects the following major items:

•

a weighted average cost of capital of 7.22 percent, reflecting:

•

a return on common equity of 9.2 percent, assuming achievement by the company of $825,000 of austerity measures;

•

cost of long-term debt of 5.50 percent; and

•

common equity ratio of 48 percent.

•

continuation of a revenue decoupling mechanism;

•

continuation of the rate provisions pursuant to which the company recovers its purchased power costs from customers;

•

discontinuation of the provisions under which property taxes were reconciled to amounts reflected in rates;

•

discontinuation of the inclusion in rates of funding for the company's annual incentive plan for non-officer management employees;

•

continuation of provisions for potential operations penalties of up to $3 million annually if certain customer service and system reliability performance targets are not met; and

•

Other Regulatory Matters

Regulatory Assets and Liabilities

Regulatory assets and liabilities at September 30, 2011 and December 31, 2010 were comprised of the following items:


	Con Edison				CECONY
*(Millions of Dollars)*	2011		2010		2011		2010
Regulatory assets
Unrecognized pension and other postretirement costs	$	3,769	$	4,371	$	3,584	$	4,152
Future federal income tax		1,763		1,593		1,688		1,515
Environmental remediation costs		681		695		563		574
Pension and other post retirement benefits deferrals		198		138		156		90
Revenue taxes		160		145		155		140
Surcharge for New York State assessment		150		121		138		112
Net electric deferrals		126		156		126		156
Deferred storm costs		81		57		61		43
O&R transition bond charges		45		48		—		—
Deferred derivative losses – long-term		34		74		21		48
Workers' compensation		25		31		24		31
Accrued unbilled revenues		22		—		22		—
Property tax reconciliation		12		34		—		27
World Trade Center restoration costs		9		45		9		45
Recoverable energy cost		2		42		2		42
Other		129		133		119		122
Regulatory assets – long-term		7,206		7,683		6,668		7,097
Deferred derivative losses – current		110		190		90		151
Recoverable energy costs – current		—		13		—		—
Regulatory assets – current		110		203		90		151
Total Regulatory Assets	$	7,316	$	7,886	$	6,758	$	7,248
Regulatory liabilities
Allowance for cost of removal less salvage	$	440	$	422	$	365	$	350
World Trade Center settlement proceeds		62		—		62		—
Carrying charges on transmission and distribution net plant		39		28		12		5
Bonus depreciation		24		1		23		1
Energy efficiency programs		23		12		21		11
Gas line losses		21		—		21		—
New York State tax refund		20		30		20		30
Gain on sale of properties		14		28		14		28
Expenditure prudence proceeding		11		—		11		—
Other		167		131		157		122
Regulatory liabilities – long-term		821		652		706		547
Net unbilled revenue deferrals – current		116		136		115		135
Revenue decoupling mechanism		99		38		99		38
Refundable energy cost – current		38		117		13		91
Deferred derivative gains – current		4		4		3		3
Regulatory liabilities – current		257		295		230		267
Total Regulatory Liabilities	$	1,078	$	947	$	936	$	814

Short-Term Borrowing	9 Months Ended
Short-Term Borrowing	Sep. 30, 2011
Short-Term Borrowing	Note C — Short-Term Borrowing In October 2011, Con Edison and the Utilities entered into a Credit Agreement (Credit Agreement), under which banks are committed to provide loans and letters of credit on a revolving credit basis, and terminated their Amended and Restated Credit Agreement (Prior Credit Agreement) which was to expire in June 2012. Under the Credit Agreement, which expires in October 2016, there is a maximum of $2.25 billion of credit available, with the full amount available to CECONY and $1 billion available to Con Edison, including up to $1.2 billion of letters of credit. The Credit Agreement supports the Companies' commercial paper programs. The Companies have not borrowed under the Credit Agreement. The banks' commitments under the Credit Agreement are subject to certain conditions, including that there be no event of default. The commitments are not subject to maintenance of credit rating levels or the absence of a material adverse change. Upon a change of control of, or upon an event of default by one of the Companies, the banks may terminate their commitments with respect to that company, declare any amounts owed by that company under the Credit Agreement immediately due and payable and require that company to provide cash collateral relating to the letters of credit issued for it under the Credit Agreement. Events of default include the exceeding at any time of a ratio of consolidated debt to consolidated total capital of 0.65 to 1 (at September 30, 2011 this ratio was 0.48 to 1 for Con Edison and CECONY); having liens on its assets in an aggregate amount exceeding 5 percent of its consolidated total capital, subject to certain exceptions; and the failure, following any applicable notice period, to meet certain other customary covenants. Interest and fees charged for the revolving credit facilities and any loans made or letters of credit issued under the Credit Agreement reflect the Companies' respective credit ratings. At September 30, 2011 and December 31, 2010 Con Edison and CECONY had no commercial paper outstanding. At September 30, 2011 and December 31, 2010, no loans were outstanding under the Companies' Credit Agreement or Prior Credit Agreement and $223 million (including $170 million for CECONY) and $197 million (including $145 million for CECONY) of letters of credit were outstanding under the Credit Agreement or Prior Credit Agreement, respectively.
CECONY [Member]
Short-Term Borrowing	Note C — Short-Term Borrowing In October 2011, Con Edison and the Utilities entered into a Credit Agreement (Credit Agreement), under which banks are committed to provide loans and letters of credit on a revolving credit basis, and terminated their Amended and Restated Credit Agreement (Prior Credit Agreement) which was to expire in June 2012. Under the Credit Agreement, which expires in October 2016, there is a maximum of $2.25 billion of credit available, with the full amount available to CECONY and $1 billion available to Con Edison, including up to $1.2 billion of letters of credit. The Credit Agreement supports the Companies' commercial paper programs. The Companies have not borrowed under the Credit Agreement. The banks' commitments under the Credit Agreement are subject to certain conditions, including that there be no event of default. The commitments are not subject to maintenance of credit rating levels or the absence of a material adverse change. Upon a change of control of, or upon an event of default by one of the Companies, the banks may terminate their commitments with respect to that company, declare any amounts owed by that company under the Credit Agreement immediately due and payable and require that company to provide cash collateral relating to the letters of credit issued for it under the Credit Agreement. Events of default include the exceeding at any time of a ratio of consolidated debt to consolidated total capital of 0.65 to 1 (at September 30, 2011 this ratio was 0.48 to 1 for Con Edison and CECONY); having liens on its assets in an aggregate amount exceeding 5 percent of its consolidated total capital, subject to certain exceptions; and the failure, following any applicable notice period, to meet certain other customary covenants. Interest and fees charged for the revolving credit facilities and any loans made or letters of credit issued under the Credit Agreement reflect the Companies' respective credit ratings. At September 30, 2011 and December 31, 2010 Con Edison and CECONY had no commercial paper outstanding. At September 30, 2011 and December 31, 2010, no loans were outstanding under the Companies' Credit Agreement or Prior Credit Agreement and $223 million (including $170 million for CECONY) and $197 million (including $145 million for CECONY) of letters of credit were outstanding under the Credit Agreement or Prior Credit Agreement, respectively.

- Definition

The entire disclosure for short-term debt.

+ References+ Details

Pension Benefits

9 Months Ended

Sep. 30, 2011

Pension Benefits

Note D — Pension Benefits

Net Periodic Benefit Cost

The components of the Companies' net periodic benefit costs for the three and nine months ended September 30, 2011 and 2010 were as follows:


	For the Three Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2011			2010			2011			2010
Service cost – including administrative expenses	$	48		$	42		$	45		$	39
Interest cost on projected benefit obligation		140			139			131			130
Expected return on plan assets		(184	)		(175	)		(174	)		(167	)
Amortization of net actuarial loss		133			106			126			100
Amortization of prior service costs		2			2			—			2
NET PERIODIC BENEFIT COST	$	139		$	114		$	128		$	104
Amortization of regulatory asset		—			—			—			—
TOTAL PERIODIC BENEFIT COST	$	139		$	114		$	128		$	104
Cost capitalized		(45	)		(40	)		(42	)		(36	)
Cost deferred		(11	)		(29	)		(11	)		(29	)
Cost charged to operating expenses	$	83		$	45		$	75		$	39

	For the Nine Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2011			2010			2011			2010
Service cost – including administrative expenses	$	142		$	126		$	133		$	117
Interest cost on projected benefit obligation		420			417			393			390
Expected return on plan assets		(550	)		(527	)		(524	)		(501	)
Amortization of net actuarial loss		397			318			376			300
Amortization of prior service costs		6			6			4			6
NET PERIODIC BENEFIT COST	$	415		$	340		$	382		$	312
Amortization of regulatory asset*		1			1			1			1
TOTAL PERIODIC BENEFIT COST	$	416		$	341		$	383		$	313
Cost capitalized		(141	)		(118	)		(131	)		(109	)
Cost deferred		(68	)		(85	)		(70	)		(82	)
Cost charged to operating expenses	$	207		$	138		$	182		$	122

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

Expected Contributions

The Companies are not required under funding regulations and laws to make any contributions to the pension plan during 2011. The Companies' policy is to fund their accounting cost to the extent tax deductible. In 2011, Con Edison contributed $533 million to the pension plan (of which $491 million was contributed by CECONY). During the first nine months of 2010, Con Edison contributed $434 million to the pension plan (of which $397 million was contributed by CECONY). During the first nine months of 2011, the Companies funded $11 million for the non-qualified supplemental pension plans.

CECONY [Member]

Pension Benefits

Note D — Pension Benefits

Net Periodic Benefit Cost

The components of the Companies' net periodic benefit costs for the three and nine months ended September 30, 2011 and 2010 were as follows:


	For the Three Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2011			2010			2011			2010
Service cost – including administrative expenses	$	48		$	42		$	45		$	39
Interest cost on projected benefit obligation		140			139			131			130
Expected return on plan assets		(184	)		(175	)		(174	)		(167	)
Amortization of net actuarial loss		133			106			126			100
Amortization of prior service costs		2			2			—			2
NET PERIODIC BENEFIT COST	$	139		$	114		$	128		$	104
Amortization of regulatory asset		—			—			—			—
TOTAL PERIODIC BENEFIT COST	$	139		$	114		$	128		$	104
Cost capitalized		(45	)		(40	)		(42	)		(36	)
Cost deferred		(11	)		(29	)		(11	)		(29	)
Cost charged to operating expenses	$	83		$	45		$	75		$	39


	For the Nine Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2011			2010			2011			2010
Service cost – including administrative expenses	$	142		$	126		$	133		$	117
Interest cost on projected benefit obligation		420			417			393			390
Expected return on plan assets		(550	)		(527	)		(524	)		(501	)
Amortization of net actuarial loss		397			318			376			300
Amortization of prior service costs		6			6			4			6
NET PERIODIC BENEFIT COST	$	415		$	340		$	382		$	312
Amortization of regulatory asset*		1			1			1			1
TOTAL PERIODIC BENEFIT COST	$	416		$	341		$	383		$	313
Cost capitalized		(141	)		(118	)		(131	)		(109	)
Cost deferred		(68	)		(85	)		(70	)		(82	)
Cost charged to operating expenses	$	207		$	138		$	182		$	122

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

Expected Contributions

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Implementation Guide (Q and A)

-Number FAS88

-Paragraph 63

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-URI http://asc.fasb.org/topic&trid=2235017

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-Name Statement of Financial Accounting Standard (FAS)

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-Name Statement of Financial Accounting Standard (FAS)

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-Name Statement of Financial Accounting Standard (FAS)

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Reference 9: http://www.xbrl.org/2003/role/presentationRef

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-Number 132R

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-Name Accounting Principles Board Opinion (APB)

-Number 30

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+ Details

Other Postretirement Benefits

9 Months Ended

Sep. 30, 2011

Other Postretirement Benefits

Note E — Other Postretirement Benefits

Net Periodic Benefit Cost

The components of the Companies' net periodic postretirement benefit costs for the three and nine months ended September 30, 2011 and 2010 were as follows:


	For the Three Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2011			2010			2011			2010
Service cost	$	7		$	6		$	5		$	5
Interest cost on accumulated other postretirement benefit obligation		20			23			18			20
Expected return on plan assets		(22	)		(22	)		(21	)		(19	)
Amortization of net actuarial loss		22			23			20			21
Amortization of prior service cost		(3	)		(3	)		(3	)		(4	)
Amortization of transition obligation		1			1			1			1
NET PERIODIC POSTRETIREMENT BENEFIT COST	$	25		$	28		$	20		$	24
Cost capitalized		(9	)		(10	)		(7	)		(8	)
Cost deferred		3			2			3			1
Cost charged to operating expenses	$	19		$	20		$	16		$	17

	For the Nine Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2011			2010			2011			2010
Service cost	$	19		$	18		$	15		$	15
Interest cost on accumulated other postretirement benefit obligation		62			69			54			60
Expected return on plan assets		(66	)		(66	)		(59	)		(57	)
Amortization of net actuarial loss		66			69			60			63
Amortization of prior service cost		(7	)		(9	)		(9	)		(12	)
Amortization of transition obligation		3			3			3			3
NET PERIODIC POSTRETIREMENT BENEFIT COST	$	77		$	84		$	64		$	72
Cost capitalized		(27	)		(30	)		(22	)		(25	)
Cost deferred		12			2			10			(1	)
Cost charged to operating expenses	$	62		$	56		$	52		$	46

Expected Contributions

- Definition

The entire disclosure for postemployment benefits, which may include supplemental unemployment benefits, obligations recognized for all types of benefits provided to former or inactive employees, their beneficiaries, and covered dependents after employment but before retirement. Disclosure may also include discussion that an obligation for postemployment benefits is not accrued in accordance with regulation only because the amount cannot be reasonably estimated.

+ References+ Details

Environmental Matters

9 Months Ended

Sep. 30, 2011

Environmental Matters

Note F — Environmental Matters

Superfund Sites

Hazardous substances, such as asbestos, polychlorinated biphenyls (PCBs) and coal tar, have been used or generated in the course of operations of the Utilities and their predecessors and are present at sites and in facilities and equipment they currently or previously owned, including sites at which gas was manufactured or stored.

The Federal Comprehensive Environmental Response, Compensation and Liability Act of 1980 and similar state statutes (Superfund) impose joint and several liability, regardless of fault, upon generators of hazardous substances for investigation and remediation costs (which include costs of demolition, removal, disposal, storage, replacement, containment, and monitoring) and natural resource damages. Liability under these laws can be material and may be imposed for contamination from past acts, even though such past acts may have been lawful at the time they occurred. The sites at which the Utilities have been asserted to have liability under these laws, including their manufactured gas plant sites and any neighboring areas to which contamination may have migrated, are referred to herein as "Superfund Sites."

For Superfund Sites where there are other potentially responsible parties and the Utilities are not managing the site investigation and remediation, the accrued liability represents an estimate of the amount the Utilities will need to pay to investigate and, where determinable, discharge their related obligations. For Superfund Sites (including the manufactured gas plant sites) for which one of the Utilities is managing the investigation and remediation, the accrued liability represents an estimate of the company's share of 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, 2011 and December 31, 2010 were as follows:


	Con Edison				CECONY
*(Millions of Dollars)*	2011		2010		2011		2010
Accrued Liabilities:
Manufactured gas plant sites	$	432	$	446	$	314	$	327
Other Superfund Sites		64		66		63		65
Total	$	496	$	512	$	377	$	392
Regulatory assets	$	681	$	695	$	563	$	574

Most of the accrued Superfund Site liability relates to sites that have been investigated, in whole or in part. However, for some of the sites, the extent and associated cost of the required remediation has not yet been determined. As investigations progress and information pertaining to the required remediation becomes available, the Utilities expect that additional liability may be accrued, the amount of which is not presently determinable, but may be material. 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. In February 2011, the NYSPSC initiated a proceeding to examine the existing mechanisms pursuant to which utilities recover such costs and possible alternatives.

Environmental remediation costs incurred related to Superfund Sites for the three and nine months ended September 30, 2011 and 2010, were as follows:


	For the Three Months Ended September 30,
	Con Edison				CECONY
*(Millions of Dollars)*	2011		2010		2011		2010
Remediation costs incurred	$	9	$	9	$	9	$	8

	For the Nine Months Ended September 30,
	Con Edison				CECONY
*(Millions of Dollars)*	2011		2010		2011		2010
Remediation costs incurred	$	24	$	32	$	22	$	30

There were no insurance recoveries related to Superfund Sites for the three months ended September 30, 2011 and 2010. Insurance recoveries related to Superfund Sites for the nine months ended September 30, 2011 and 2010 were immaterial.

In 2010, 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 $1.9 billion. In 2010, 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 $200 million. These estimates were based on the assumption that there is contamination at all sites, including those that have not yet been fully investigated and additional assumptions about the extent of the contamination and the type and extent of the remediation that may be required. Actual experience may be materially different.

Asbestos Proceedings

Suits have been brought in New York State and federal courts against the Utilities and many other defendants, wherein a large number of plaintiffs sought large amounts of compensatory and punitive damages for deaths and injuries allegedly caused by exposure to asbestos at various premises of the Utilities. The suits that have been resolved, 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 2010, CECONY estimated that its aggregate undiscounted potential liability for these suits and additional suits that may be brought over the next 15 years is $10 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, 2011 and December 31, 2010 were as follows:


	Con Edison				CECONY
*(Millions of Dollars)*	2011		2010		2011		2010
Accrued liability – asbestos suits	$	10	$	10	$	10	$	10
Regulatory assets – asbestos suits	$	10	$	10	$	10	$	10
Accrued liability – workers' compensation	$	99	$	106	$	94	$	101
Regulatory assets – workers' compensation	$	25	$	31	$	24	$	31

CECONY [Member]

Environmental Matters

Note F — Environmental Matters

Superfund Sites

The accrued liabilities and regulatory assets related to Superfund Sites at September 30, 2011 and December 31, 2010 were as follows:


	Con Edison				CECONY
*(Millions of Dollars)*	2011		2010		2011		2010
Accrued Liabilities:
Manufactured gas plant sites	$	432	$	446	$	314	$	327
Other Superfund Sites		64		66		63		65
Total	$	496	$	512	$	377	$	392
Regulatory assets	$	681	$	695	$	563	$	574

Environmental remediation costs incurred related to Superfund Sites for the three and nine months ended September 30, 2011 and 2010, were as follows:


	For the Three Months Ended September 30,
	Con Edison				CECONY
*(Millions of Dollars)*	2011		2010		2011		2010
Remediation costs incurred	$	9	$	9	$	9	$	8

	For the Nine Months Ended September 30,
	Con Edison				CECONY
*(Millions of Dollars)*	2011		2010		2011		2010
Remediation costs incurred	$	24	$	32	$	22	$	30

Asbestos Proceedings


	Con Edison				CECONY
*(Millions of Dollars)*	2011		2010		2011		2010
Accrued liability – asbestos suits	$	10	$	10	$	10	$	10
Regulatory assets – asbestos suits	$	10	$	10	$	10	$	10
Accrued liability – workers' compensation	$	99	$	106	$	94	$	101
Regulatory assets – workers' compensation	$	25	$	31	$	24	$	31

- Definition

The entire disclosure for environmental loss contingencies, such as presence of hazardous waste, relevant information from reports issued by regulators, and estimated costs to achieve compliance with regulatory requirements. This element may be used for all of an entity's disclosures about environmental loss contingencies.

+ References+ Details

Other Material Contingencies

9 Months Ended

Sep. 30, 2011

Other Material Contingencies

Note G — 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 been convicted) 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 has provided 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. 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).

CECONY is also investigating the September 2010 arrest of a retired employee (who has since pleaded guilty to participating in a bribery scheme in which the employee received payments from two companies that supplied materials to the company) and the January 2011 arrest of an employee (for accepting kickbacks from an engineering firm that performed work for the

company). CECONY has provided information to governmental authorities in connection with their ongoing investigations of these matters.

The company, based upon its evaluation of its internal controls for 2010 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.

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 $(52) million at September 30, 2011 and $(41) million at December 31, 2010 and is comprised of a $234 million gross investment less $286 million deferred tax liabilities at September 30, 2011 and $235 million gross investment less $276 million of deferred tax liabilities at December 31, 2010.

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 2010, 2009 and 2008, the IRS has disallowed $40 million, $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, 2011, in the aggregate, was $232 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 $86 million net of tax at September 30, 2011.

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 $862 million and $859 million at September 30, 2011 and December 31, 2010, respectively.

A summary, by type and term, of Con Edison's total guarantees at September 30, 2011 is as follows:


Guarantee Type	0 – 3 years		4 – 10 years		> 10 years		Total
	*(Millions of Dollars)*
Energy transactions	$	652	$	3	$	153	$	808
Intra-company guarantees		15		—		1		16
Other guarantees		25		13		—		38
TOTAL	$	692	$	16	$	154	$	862

Energy Transactions — Con Edison guarantees payments on behalf of its competitive energy businesses in order to facilitate physical and financial transactions in gas, pipeline capacity, transportation, oil, electricity and energy services. To the extent that liabilities exist under the contracts subject to these guarantees, such liabilities are included in Con Edison's consolidated balance sheet.

Intra-company Guarantees — Con Edison guarantees electricity sales made by Con Edison Energy and Con Edison Solutions to O&R and CECONY.

Other Guarantees — Con Edison, also guarantees the following:

•

$13 million relates to a guarantee issued by Con Edison to CECONY covering a former Con Edison subsidiary's lease payments to use CECONY's conduit system in accordance with a tariff approved by the NYSPSC and a guarantee issued by Con Edison to a landlord to guarantee the former subsidiary's obligations under a building lease. The former subsidiary is obligated to reimburse Con Edison for any payments made under these guarantees. This obligation is fully secured by letters of credit;

•

$25 million for guarantees provided by Con Edison to Travelers Insurance Company for indemnity agreements for surety bonds in connection with energy service projects performed by Con Edison Solutions; and

•

Con Edison, on behalf of Con Edison Solutions, as a retail electric provider, issued a guarantee to the Public Utility Commission of Texas with no specified limitation on the amount guaranteed, covering the payment of all obligations of a retail electric provider. Con Edison's estimate of the maximum potential obligation is $5 million as of September 30, 2011.

CECONY [Member]

Other Material Contingencies

Note G — Other Material Contingencies

Manhattan Steam Main Rupture

Investigations of Vendor Payments

company). CECONY has provided information to governmental authorities in connection with their ongoing investigations of these matters.

Lease In/Lease Out Transactions

Guarantees

A summary, by type and term, of Con Edison's total guarantees at September 30, 2011 is as follows:


Guarantee Type	0 – 3 years		4 – 10 years		> 10 years		Total
	*(Millions of Dollars)*
Energy transactions	$	652	$	3	$	153	$	808
Intra-company guarantees		15		—		1		16
Other guarantees		25		13		—		38
TOTAL	$	692	$	16	$	154	$	862

Intra-company Guarantees — Con Edison guarantees electricity sales made by Con Edison Energy and Con Edison Solutions to O&R and CECONY.

Other Guarantees — Con Edison, also guarantees the following:

•

- Definition

The entire disclosure for commitments and contingencies.

+ References

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+ Details

Financial Information By Business Segment

9 Months Ended

Sep. 30, 2011

Financial Information By Business Segment

Note H — Financial Information by Business Segment

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)*	2011			2010			2011			2010			2011		2010		2011			2010
CECONY
Electric	$	2,644		$	2,570		$	3		$	3		$	166	$	156	$	758		$	715
Gas		197			204			1			1			28		26		(23	)		(16	)
Steam		76			91			20			18			15		16		(33	)		(33	)
Consolidation adjustments		—			—			(24	)		(22	)		—		—		—			—
Total CECONY	$	2,917		$	2,865		$	—		$	—		$	209	$	198	$	702		$	666
O&R
Electric	$	217		$	245		$	—		$	—		$	9	$	8	$	44		$	52
Gas		24			25			—			—			3		3		(6	)		(4	)
Total O&R	$	241		$	270		$	—		$	—		$	12	$	11	$	38		$	48
Competitive energy businesses	$	472		$	584		$	3		$	2		$	1	$	2	$	16		$	(8	)
Other*		(1	)		(12	)		(3	)		(2	)		—		—		—			(1	)
Total Con Edison	$	3,629		$	3,707		$	—		$	—		$	222	$	211	$	756		$	705

*	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)*	2011			2010			2011			2010			2011		2010		2011			2010
CECONY
Electric	$	6,378		$	6,402		$	9		$	9		$	489	$	464	$	1,326		$	1,228
Gas		1,156			1,126			4			4			82		76		212			243
Steam		508			487			59			55			47		46		81			41
Consolidation adjustments		—			—			(72	)		(68	)		—		—		—			—
Total CECONY	$	8,042		$	8,015		$	—		$	—		$	618	$	586	$	1,619		$	1,512
O&R
Electric	$	507		$	559		$	—		$	—		$	26	$	24	$	69		$	71
Gas		153			150			—			—			10		9		22			20
Total O&R	$	660		$	709		$	—		$	—		$	36	$	33	$	91		$	91
Competitive energy businesses	$	1,286		$	1,491		$	9		$	6		$	5	$	7	$	75		$	25
Other*		(16	)		(30	)		(9	)		(6	)		—		—		(2	)		(1	)
Total Con Edison	$	9,972		$	10,185		$	—		$	—		$	659	$	626	$	1,781		$	1,627

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

CECONY [Member]

Financial Information By Business Segment

Note H — Financial Information by Business Segment

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)*	2011			2010			2011			2010			2011		2010		2011			2010
CECONY
Electric	$	2,644		$	2,570		$	3		$	3		$	166	$	156	$	758		$	715
Gas		197			204			1			1			28		26		(23	)		(16	)
Steam		76			91			20			18			15		16		(33	)		(33	)
Consolidation adjustments		—			—			(24	)		(22	)		—		—		—			—
Total CECONY	$	2,917		$	2,865		$	—		$	—		$	209	$	198	$	702		$	666
O&R
Electric	$	217		$	245		$	—		$	—		$	9	$	8	$	44		$	52
Gas		24			25			—			—			3		3		(6	)		(4	)
Total O&R	$	241		$	270		$	—		$	—		$	12	$	11	$	38		$	48
Competitive energy businesses	$	472		$	584		$	3		$	2		$	1	$	2	$	16		$	(8	)
Other*		(1	)		(12	)		(3	)		(2	)		—		—		—			(1	)
Total Con Edison	$	3,629		$	3,707		$	—		$	—		$	222	$	211	$	756		$	705

*	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)*	2011			2010			2011			2010			2011		2010		2011			2010
CECONY
Electric	$	6,378		$	6,402		$	9		$	9		$	489	$	464	$	1,326		$	1,228
Gas		1,156			1,126			4			4			82		76		212			243
Steam		508			487			59			55			47		46		81			41
Consolidation adjustments		—			—			(72	)		(68	)		—		—		—			—
Total CECONY	$	8,042		$	8,015		$	—		$	—		$	618	$	586	$	1,619		$	1,512
O&R
Electric	$	507		$	559		$	—		$	—		$	26	$	24	$	69		$	71
Gas		153			150			—			—			10		9		22			20
Total O&R	$	660		$	709		$	—		$	—		$	36	$	33	$	91		$	91
Competitive energy businesses	$	1,286		$	1,491		$	9		$	6		$	5	$	7	$	75		$	25
Other*		(16	)		(30	)		(9	)		(6	)		—		—		(2	)		(1	)
Total Con Edison	$	9,972		$	10,185		$	—		$	—		$	659	$	626	$	1,781		$	1,627

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

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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-Name Accounting Standards Codification

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+ Details

Derivative Instruments And Hedging Activities

9 Months Ended

Sep. 30, 2011

Derivative Instruments And Hedging Activities

Note I — 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, 2011 and December 31, 2010 were as follows:


	Con Edison						CECONY
*(Millions of Dollars)*	2011			2010			2011			2010
Fair value of net derivative assets/(liabilities) – gross	$	(115	)	$	(261	)	$	(62	)	$	(156	)
Impact of netting of cash collateral		73			176			41			104
Fair value of net derivative assets/(liabilities) – net	$	(42	)	$	(85	)	$	(21	)	$	(52	)

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, 2011, Con Edison and CECONY had $120 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 $60 million with investment-grade counterparties, $44 million with commodity exchange brokers, $15 million with independent system operators and $1 million with non-investment grade counterparties. 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, 2011 were:


*(Millions of Dollars)*	Fair Value of Commodity Derivatives (a) Balance Sheet Location	Con Edison			CECONY
Derivative Assets
Current	Other current assets	$	112		$	41
Long-term	Other deferred charges and non-current assets		36			23
Total derivative assets		$	148		$	64
Impact of netting			(68	)		(25	)
Net derivative assets		$	80		$	39
Derivative Liabilities
Current	Fair value of derivative liabilities	$	209		$	95
Long-term	Fair value of derivative liabilities		54			31
Total derivative liabilities		$	263		$	126
Impact of netting			(141	)		(66	)
Net derivative liabilities		$	122		$	60

(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 values of the Companies' commodity derivatives at December 31, 2010 were:


*(Millions of Dollars)*	Fair Value of Commodity Derivatives (a) Balance Sheet Location	Con Edison			CECONY
Derivative Assets
Current	Other current assets	$	184		$	29
Long-term	Other deferred charges and non-current assets		51			19
Total derivative assets		$	235		$	48
Impact of netting			(129	)		—
Net derivative assets		$	106		$	48
Derivative Liabilities
Current	Fair value of derivative liabilities	$	385		$	148
Long-term	Fair value of derivative liabilities		111			56
Total derivative liabilities		$	496		$	204
Impact of netting			(305	)		(104	)
Net derivative liabilities		$	191		$	100

(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 cost, including hedging gains and losses, in accordance with rate provisions approved by the applicable state utility commissions. 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 tables present 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, 2011:


Realized and Unrealized Gains/(Losses) on Commodity Derivatives (a) Deferred or Recognized in Income for the three months ended September 30, 2011
*(Millions of Dollars)*	Balance Sheet Location	Con Edison			CECONY
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations:
Current	Deferred derivative gains	$	(2	)	$	(1	)
Long-term	Regulatory liabilities		1			1
Total deferred gains		$	(1	)	$	—
Current	Deferred derivative losses	$	12		$	7
Current	Recoverable energy costs		(75	)		(53	)
Long-term	Regulatory assets		10			6
Total deferred losses		$	(53	)	$	(40	)
Net deferred losses		$	(54	)	$	(40	)
	Income Statement Location
Pre-tax gain/(loss) recognized in income
	Purchased power expense	$	29	(b)	$	—
	Gas purchased for resale		6			—
	Non-utility revenue		5	(b)		—
Total pre-tax gain/(loss) recognized in income		$	40		$	—

(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, 2011 Con Edison recorded in non-utility operating revenues and purchased power expense an unrealized pre-tax (loss) of $(10) million and $(1) million, respectively.


Realized and Unrealized Gains/(Losses) on Commodity Derivatives (a) Deferred or Recognized in Income for the nine months ended September 30, 2011
*(Millions of Dollars)*	Balance Sheet Location	Con Edison			CECONY
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations:
Current	Deferred derivative gains	$	—		$	—
Long-term	Regulatory liabilities		3			3
Total deferred gains		$	3		$	3
Current	Deferred derivative losses	$	80		$	61
Current	Recoverable energy costs		(177	)		(134	)
Long-term	Regulatory assets		38			27
Total deferred losses		$	(59	)	$	(47	)
Net deferred losses		$	(56	)	$	(44	)
	Income Statement Location
Pre-tax gain/(loss) recognized in income
	Purchased power expense	$	81	(b)	$	—
	Gas purchased for resale		17			—
	Non-utility revenue		22	(b)		—
Total pre-tax gain/(loss) recognized in income		$	120		$	—

(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, 2011, Con Edison recorded in non-utility operating revenues and purchased power expense an unrealized pre-tax (loss)/gain of $(35) million and $59 million, respectively.

The following tables present 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	)(b)	$	—
	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.

As of September 30, 2011, Con Edison had 1,565 contracts, including 612 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		810		16,479,730		73		8,201		682		98,382,500		1,565
CECONY		146		4,025,375		—		—		466		90,710,000		612

(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, 2011, 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	$	128		$	70
Collateral posted	$	34	(b)	$	29	(b)
Additional collateral (c) (downgrade one level from current ratings (d))	$	11		$	9
Additional collateral (c) (downgrade to below investment grade from current ratings (d))	$	143	(e)	$	54	(e)

(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, 2011, would have amounted to an estimated $146 million for Con Edison. 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, 2011, the Utilities posted combined collateral of $34 million, including an estimated $5 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, 2011, if Con Edison had been downgraded to below investment grade, it would have been required to post additional collateral for such derivative instruments of an estimated $16 million.

Interest Rate Swap

O&R has an interest rate swap pursuant to which it 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, 2011 was an unrealized loss of $9 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. The increase in the fair value of the swap for the three and nine months ended September 30, 2011 was not material. In the event O&R's credit rating was downgraded to BBB- or lower by S&P or Baa3 or lower by Moody's, the swap counterparty could elect to terminate the agreement and, if it did so, the parties would then be required to settle the transaction.

CECONY [Member]

Derivative Instruments And Hedging Activities

Note I — Derivative Instruments and Hedging Activities

Energy Price Hedging


	Con Edison						CECONY
*(Millions of Dollars)*	2011			2010			2011			2010
Fair value of net derivative assets/(liabilities) – gross	$	(115	)	$	(261	)	$	(62	)	$	(156	)
Impact of netting of cash collateral		73			176			41			104
Fair value of net derivative assets/(liabilities) – net	$	(42	)	$	(85	)	$	(21	)	$	(52	)

Credit Exposure

Economic Hedges

The fair values of the Companies' commodity derivatives at September 30, 2011 were:


*(Millions of Dollars)*	Fair Value of Commodity Derivatives (a) Balance Sheet Location	Con Edison			CECONY
Derivative Assets
Current	Other current assets	$	112		$	41
Long-term	Other deferred charges and non-current assets		36			23
Total derivative assets		$	148		$	64
Impact of netting			(68	)		(25	)
Net derivative assets		$	80		$	39
Derivative Liabilities
Current	Fair value of derivative liabilities	$	209		$	95
Long-term	Fair value of derivative liabilities		54			31
Total derivative liabilities		$	263		$	126
Impact of netting			(141	)		(66	)
Net derivative liabilities		$	122		$	60

(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 values of the Companies' commodity derivatives at December 31, 2010 were:


*(Millions of Dollars)*	Fair Value of Commodity Derivatives (a) Balance Sheet Location	Con Edison			CECONY
Derivative Assets
Current	Other current assets	$	184		$	29
Long-term	Other deferred charges and non-current assets		51			19
Total derivative assets		$	235		$	48
Impact of netting			(129	)		—
Net derivative assets		$	106		$	48
Derivative Liabilities
Current	Fair value of derivative liabilities	$	385		$	148
Long-term	Fair value of derivative liabilities		111			56
Total derivative liabilities		$	496		$	204
Impact of netting			(305	)		(104	)
Net derivative liabilities		$	191		$	100

(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 following tables present 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, 2011:


Realized and Unrealized Gains/(Losses) on Commodity Derivatives (a) Deferred or Recognized in Income for the three months ended September 30, 2011
*(Millions of Dollars)*	Balance Sheet Location	Con Edison			CECONY
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations:
Current	Deferred derivative gains	$	(2	)	$	(1	)
Long-term	Regulatory liabilities		1			1
Total deferred gains		$	(1	)	$	—
Current	Deferred derivative losses	$	12		$	7
Current	Recoverable energy costs		(75	)		(53	)
Long-term	Regulatory assets		10			6
Total deferred losses		$	(53	)	$	(40	)
Net deferred losses		$	(54	)	$	(40	)
	Income Statement Location
Pre-tax gain/(loss) recognized in income
	Purchased power expense	$	29	(b)	$	—
	Gas purchased for resale		6			—
	Non-utility revenue		5	(b)		—
Total pre-tax gain/(loss) recognized in income		$	40		$	—

(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, 2011 Con Edison recorded in non-utility operating revenues and purchased power expense an unrealized pre-tax (loss) of $(10) million and $(1) million, respectively.


Realized and Unrealized Gains/(Losses) on Commodity Derivatives (a) Deferred or Recognized in Income for the nine months ended September 30, 2011
*(Millions of Dollars)*	Balance Sheet Location	Con Edison			CECONY
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations:
Current	Deferred derivative gains	$	—		$	—
Long-term	Regulatory liabilities		3			3
Total deferred gains		$	3		$	3
Current	Deferred derivative losses	$	80		$	61
Current	Recoverable energy costs		(177	)		(134	)
Long-term	Regulatory assets		38			27
Total deferred losses		$	(59	)	$	(47	)
Net deferred losses		$	(56	)	$	(44	)
	Income Statement Location
Pre-tax gain/(loss) recognized in income
	Purchased power expense	$	81	(b)	$	—
	Gas purchased for resale		17			—
	Non-utility revenue		22	(b)		—
Total pre-tax gain/(loss) recognized in income		$	120		$	—

(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, 2011, Con Edison recorded in non-utility operating revenues and purchased power expense an unrealized pre-tax (loss)/gain of $(35) million and $59 million, respectively.

The following tables present 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	)(b)	$	—
	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.


	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		810		16,479,730		73		8,201		682		98,382,500		1,565
CECONY		146		4,025,375		—		—		466		90,710,000		612

(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.


*(Millions of Dollars)*	Con Edison (a)			CECONY (a)
Aggregate fair value – net liabilities	$	128		$	70
Collateral posted	$	34	(b)	$	29	(b)
Additional collateral (c) (downgrade one level from current ratings (d))	$	11		$	9
Additional collateral (c) (downgrade to below investment grade from current ratings (d))	$	143	(e)	$	54	(e)

(a)

(b)	Across the Utilities' energy derivative positions, credit limits for the same counterparties are generally integrated. At September 30, 2011, the Utilities posted combined collateral of $34 million, including an estimated $5 million attributable to O&R.

(c)

(d)

(e)	Derivative instruments that are net assets have been excluded from the table. At September 30, 2011, if Con Edison had been downgraded to below investment grade, it would have been required to post additional collateral for such derivative instruments of an estimated $16 million.

Interest Rate Swap

- Definition

The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items.

+ References

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+ Details

Fair Value Measurements

9 Months Ended

Sep. 30, 2011

Fair Value Measurements

Note J — Fair Value Measurements

The accounting rules for fair value measurements and disclosures define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date in a principal or most advantageous market. Fair value is a market-based measurement that is determined based on inputs, which refer broadly to assumptions that market participants use in pricing assets or liabilities. These inputs can be readily observable, market corroborated, or generally unobservable firm inputs. The Companies often make certain assumptions that market participants would use in pricing the asset or liability, including assumptions about risk, and the risks inherent in the inputs to valuation techniques. The Companies use valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs.

The accounting rules for fair value measurements and disclosures established a fair value hierarchy, 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. The Companies classify fair value balances based on the fair value hierarchy defined by the accounting rules for fair value measurements and disclosures as follows:

•

Level 1 – Consists of assets or liabilities whose value is based on unadjusted quoted prices in active markets at the measurement date. An active market is one in which transactions for assets or liabilities occur with sufficient frequency and volume to provide pricing information on an ongoing basis. This category includes contracts traded on active exchange markets valued using unadjusted prices quoted directly from the exchange.

•

Level 2 – Consists of assets or liabilities valued using industry standard models and based on prices, other than quoted prices within Level 1, that are either directly or indirectly observable as of the measurement date. The industry standard models consider observable assumptions including time value, volatility factors, and current market and contractual prices for the underlying commodities, in addition to other economic measures. This category includes contracts traded on active exchanges or in over-the-counter markets priced with industry standard models.

•

Level 3 – Consists of assets or liabilities whose fair value is estimated based on internally developed models or methodologies using inputs that are generally less readily observable and supported by little, if any, market activity at the measurement date. Unobservable inputs are developed based on the best available information and subject to cost benefit constraints. This category includes contracts priced using models that are internally developed and contracts placed in illiquid markets. It also includes contracts that expire after the period of time for which quoted prices are available and internal models are used to determine a significant portion of the value.

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, 2011 are summarized as follows:


	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	$	2	$	—	$	52		$	28		$	69		$	17		$	(44	)	$	(6	)	$	79		$	39
Transfer in (5) (6)		1		1		—			—			—			—			—			—			1			1
Transfer out (5) (6)		—		—		(1	)		(1	)		—			—			—			—			(1	)		(1	)
Commodity (1)		3		1		51			27			69			17			(44	)		(6	)		79			39
Other assets (3)		75		75		—			—			100			91			—			—			175			166
Total	$	78	$	76	$	51		$	27		$	169		$	108		$	(44	)	$	(6	)	$	254		$	205
Derivative liabilities:
Commodity	$	10	$	5	$	130		$	91		$	98		$	11		$	(117	)	$	(47	)	$	121		$	60
Transfer in (5) (7)		—		—		23			8			1			1			—			—			24			9
Transfer out (5) (7)		—		—		(1	)		(1	)		(23	)		(8	)		—			—			(24	)		(9	)
Commodity (1)	$	10	$	5	$	152		$	98		$	76		$	4		$	(117	)	$	(47	)	$	121		$	60
Interest rate contract (2)		—		—		—			—			9			—			—			—			9			—
Total	$	10	$	5	$	152		$	98		$	85		$	4		$	(117	)	$	(47	)	$	130		$	60

(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 I.

(2)	See Note I.

(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 1 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 December 31, 2010 to less than one year as of September 30, 2011.

Assets and liabilities measured at fair value on a recurring basis as of December 31, 2010 are summarized as follows:


	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)	$	2	$	1	$	72		$	21		$	144		$	13		$	(112	)	$	13		$	106		$	48
Other assets (3)		65		64		—			—			101			92			—			—			166			156
Total	$	67	$	65	$	72		$	21		$	245		$	105		$	(112	)	$	13		$	272		$	204
Derivative liabilities:
Commodity	$	4	$	2	$	270		$	177		$	205		$	12		$	(288	)	$	(91	)	$	191		$	100
Transfer in (5) (6) (7)		—		—		(36	)		(36	)		(9	)		(9	)		—			—			(45	)		(45	)
Transfer out (5) (6) (7)		—		—		9			9			36			36			—			—			45			45
Commodity (1)	$	4	$	2	$	243		$	150		$	232		$	39		$	(288	)	$	(91	)	$	191		$	100
Interest rate contract (2)		—		—		—			—			10			—			—			—			10			—
Total	$	4	$	2	$	243		$	150		$	242		$	39		$	(288	)	$	(91	)	$	201		$	100

(1)

(2)	See Note I.

(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 December 31, 2009 to less than one year as of December 31, 2010.

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, 2011 and classified as Level 3 in the fair value hierarchy below.


	For the Three Months Ended September 30, 2011
				Total Gains/(Losses)— Realized and Unrealized
*(Millions of Dollars)*	Beginning Balance as of July 1, 2011			Included in Earnings			Included in Regulatory Assets and Liabilities			Purchases		Issuances		Sales		Settlements		Transfer In/Out of Level 3		Ending Balance as of September 30, 2011
Con Edison
Derivatives:
Commodity	$	(25	)	$	(27	)	$	9		$	8	$	—	$	—	$	4	$	24	$	(7	)
Interest rate contract		(10	)		(1	)		1			—		—		—		1		—		(9	)
Other assets (1)		106			(3	)		(3	)		—		—		—		—		—		100
Total	$	71		$	(31	)	$	7		$	8	$	—	$	—	$	5	$	24	$	84
CECONY
Derivatives:
Commodity	$	—		$	(8	)	$	1		$	8	$	—	$		$	3	$	9	$	13
Other assets (1)		96			(3	)		(2	)		—		—				—		—		91
Total	$	96		$	(11	)	$	(1	)	$	8	$	—	$		$	3	$	9	$	104

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


	For the Nine Months Ended September 30, 2011
				Total Gains/(Losses)— Realized and Unrealized
*(Millions of Dollars)*	Beginning Balance as of January 1, 2011			Included in Earnings			Included in Regulatory Assets and Liabilities			Purchases		Issuances		Sales		Settlements			Transfer In/Out of Level 3		Ending Balance as of September 30, 2011
Con Edison
Derivatives:
Commodity	$	(88	)	$	(5	)	$	54		$	22	$	—	$	—	$	(19	)	$	29	$	(7	)
Interest rate contract		(10	)		(3	)		1			—		—		—		3			—		(9	)
Other assets (1)		101			—			(1	)		—		—		—		—			—		100
Total	$	3		$	(8	)	$	54		$	22	$	—	$	—	$	(16	)	$	29	$	84
CECONY
Derivatives:
Commodity	$	(26	)	$	(11	)	$	22		$	18	$	—	$	—	$	(4	)	$	14	$	13
Other assets (1)		92			—			(1	)		—		—		—		—			—		91
Total	$	66		$	(11	)	$	21		$	18	$	—	$	—	$	(4	)	$	14	$	104

(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, 2010 and classified as Level 3 in the fair value hierarchy below.


	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		Settlements		Transfer In/Out of Level 3			Ending Balance as of September 30, 2010
Con Edison
Derivatives:
Commodity	$	(101	)	$	(34	)	$	(12	)	$	1	$	—	$	—	$	4	$	(2	)	$	(144	)
Interest rate contract		(12	)		—			—			—		—		—		—		—			(12	)
Other assets (1)		94			—			2			—		—		—		—		—			96
Total	$	(19	)	$	(34	)	$	(10	)	$	1	$	—	$	—	$	4	$	(2	)	$	(60	)
CECONY
Derivatives:
Commodity	$	(30	)	$	(7	)	$	(3	)	$	1	$	—	$	—	$	4	$	(2	)	$	(37	)
Other assets (1)		85			—			2			—		—		—		—		—			87
Total	$	55		$	(7	)	$	(1	)	$	1	$	—	$	—	$	4	$	(2	)	$	50

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


	For 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		Settlements			Transfer In/Out of Level 3		Ending Balance as of September 30, 2010
Con Edison
Derivatives:
Commodity	$	(59	)	$	(68	)	$	(56	)	$	2	$	—	$	—	$	16		$	21	$	(144	)
Interest rate contract		(11	)		(2	)		(1	)		—		—		—		2			—		(12	)
Other assets (1)		92			—			4			—		—		—		—			—		96
Total	$	22		$	(70	)	$	(53	)	$	2	$	—	$	—	$	18		$	21	$	(60	)
CECONY
Derivatives:
Commodity	$	(5	)	$	(14	)	$	(37	)	$	—	$	—	$	—	$	(2	)	$	21	$	(37	)
Other assets (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.

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. 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 ($1 million gain and $14 million gain) and purchased power costs ($13 million loss and $33 million loss) on the consolidated income statement for the three months ended September 30, 2011 and 2010, respectively. Realized and unrealized gains and losses on Level 3 commodity derivative assets and liabilities are reported in non-utility revenues ($1 million loss and $47 million gain) and purchased power costs ($26 million gain and $73 million loss) on the consolidated income statement for the nine months ended September 30, 2011 and 2010, respectively. The change in fair value relating to Level 3 commodity derivative assets held at September 30, 2011 and 2010 is included in non-utility revenues ($10 million loss and $3 million loss), and purchased power costs ($5 million loss and $22 million loss) on the consolidated income statement for the three months ended September 30, 2011 and 2010, respectively. For the nine months ended September 30, 2011 and 2010, the change in fair value relating to Level 3 commodity derivative assets and liabilities included in non-utility revenues ($35 million loss and $2 million loss) and purchased power costs ($31 million gain and $29 million loss) on the consolidated income statement.

The accounting rules for fair value measurements and disclosures require consideration of the impact of non-performance risk (including credit risk) from a market participant perspective in the measurement of the fair value of assets and liabilities. At September 30, 2011, the Companies determined that non-performance risk would not have a material impact on their financial position or results of operations. To assess non-performance risk, the Companies considered information such as collateral requirements, master netting arrangements, letters of credit and parent company guarantees, and applied a market-based method by using the counterparty's (for an asset) or the Companies' (for a liability) credit default swaps rates.

CECONY [Member]

Fair Value Measurements

Note J — Fair Value Measurements

•

Assets and liabilities measured at fair value on a recurring basis as of September 30, 2011 are summarized as follows:


	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	$	2	$	—	$	52		$	28		$	69		$	17		$	(44	)	$	(6	)	$	79		$	39
Transfer in (5) (6)		1		1		—			—			—			—			—			—			1			1
Transfer out (5) (6)		—		—		(1	)		(1	)		—			—			—			—			(1	)		(1	)
Commodity (1)		3		1		51			27			69			17			(44	)		(6	)		79			39
Other assets (3)		75		75		—			—			100			91			—			—			175			166
Total	$	78	$	76	$	51		$	27		$	169		$	108		$	(44	)	$	(6	)	$	254		$	205
Derivative liabilities:
Commodity	$	10	$	5	$	130		$	91		$	98		$	11		$	(117	)	$	(47	)	$	121		$	60
Transfer in (5) (7)		—		—		23			8			1			1			—			—			24			9
Transfer out (5) (7)		—		—		(1	)		(1	)		(23	)		(8	)		—			—			(24	)		(9	)
Commodity (1)	$	10	$	5	$	152		$	98		$	76		$	4		$	(117	)	$	(47	)	$	121		$	60
Interest rate contract (2)		—		—		—			—			9			—			—			—			9			—
Total	$	10	$	5	$	152		$	98		$	85		$	4		$	(117	)	$	(47	)	$	130		$	60

(1)

(2)	See Note I.

(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 1 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 December 31, 2010 to less than one year as of September 30, 2011.

Assets and liabilities measured at fair value on a recurring basis as of December 31, 2010 are summarized as follows:


	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)	$	2	$	1	$	72		$	21		$	144		$	13		$	(112	)	$	13		$	106		$	48
Other assets (3)		65		64		—			—			101			92			—			—			166			156
Total	$	67	$	65	$	72		$	21		$	245		$	105		$	(112	)	$	13		$	272		$	204
Derivative liabilities:
Commodity	$	4	$	2	$	270		$	177		$	205		$	12		$	(288	)	$	(91	)	$	191		$	100
Transfer in (5) (6) (7)		—		—		(36	)		(36	)		(9	)		(9	)		—			—			(45	)		(45	)
Transfer out (5) (6) (7)		—		—		9			9			36			36			—			—			45			45
Commodity (1)	$	4	$	2	$	243		$	150		$	232		$	39		$	(288	)	$	(91	)	$	191		$	100
Interest rate contract (2)		—		—		—			—			10			—			—			—			10			—
Total	$	4	$	2	$	243		$	150		$	242		$	39		$	(288	)	$	(91	)	$	201		$	100

(1)

(2)	See Note I.

(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 December 31, 2009 to less than one year as of December 31, 2010.


	For the Three Months Ended September 30, 2011
				Total Gains/(Losses)— Realized and Unrealized
*(Millions of Dollars)*	Beginning Balance as of July 1, 2011			Included in Earnings			Included in Regulatory Assets and Liabilities			Purchases		Issuances		Sales		Settlements		Transfer In/Out of Level 3		Ending Balance as of September 30, 2011
Con Edison
Derivatives:
Commodity	$	(25	)	$	(27	)	$	9		$	8	$	—	$	—	$	4	$	24	$	(7	)
Interest rate contract		(10	)		(1	)		1			—		—		—		1		—		(9	)
Other assets (1)		106			(3	)		(3	)		—		—		—		—		—		100
Total	$	71		$	(31	)	$	7		$	8	$	—	$	—	$	5	$	24	$	84
CECONY
Derivatives:
Commodity	$	—		$	(8	)	$	1		$	8	$	—	$		$	3	$	9	$	13
Other assets (1)		96			(3	)		(2	)		—		—				—		—		91
Total	$	96		$	(11	)	$	(1	)	$	8	$	—	$		$	3	$	9	$	104

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


	For the Nine Months Ended September 30, 2011
				Total Gains/(Losses)— Realized and Unrealized
*(Millions of Dollars)*	Beginning Balance as of January 1, 2011			Included in Earnings			Included in Regulatory Assets and Liabilities			Purchases		Issuances		Sales		Settlements			Transfer In/Out of Level 3		Ending Balance as of September 30, 2011
Con Edison
Derivatives:
Commodity	$	(88	)	$	(5	)	$	54		$	22	$	—	$	—	$	(19	)	$	29	$	(7	)
Interest rate contract		(10	)		(3	)		1			—		—		—		3			—		(9	)
Other assets (1)		101			—			(1	)		—		—		—		—			—		100
Total	$	3		$	(8	)	$	54		$	22	$	—	$	—	$	(16	)	$	29	$	84
CECONY
Derivatives:
Commodity	$	(26	)	$	(11	)	$	22		$	18	$	—	$	—	$	(4	)	$	14	$	13
Other assets (1)		92			—			(1	)		—		—		—		—			—		91
Total	$	66		$	(11	)	$	21		$	18	$	—	$	—	$	(4	)	$	14	$	104

(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, 2010 and classified as Level 3 in the fair value hierarchy below.


	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		Settlements		Transfer In/Out of Level 3			Ending Balance as of September 30, 2010
Con Edison
Derivatives:
Commodity	$	(101	)	$	(34	)	$	(12	)	$	1	$	—	$	—	$	4	$	(2	)	$	(144	)
Interest rate contract		(12	)		—			—			—		—		—		—		—			(12	)
Other assets (1)		94			—			2			—		—		—		—		—			96
Total	$	(19	)	$	(34	)	$	(10	)	$	1	$	—	$	—	$	4	$	(2	)	$	(60	)
CECONY
Derivatives:
Commodity	$	(30	)	$	(7	)	$	(3	)	$	1	$	—	$	—	$	4	$	(2	)	$	(37	)
Other assets (1)		85			—			2			—		—		—		—		—			87
Total	$	55		$	(7	)	$	(1	)	$	1	$	—	$	—	$	4	$	(2	)	$	50

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


	For 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		Settlements			Transfer In/Out of Level 3		Ending Balance as of September 30, 2010
Con Edison
Derivatives:
Commodity	$	(59	)	$	(68	)	$	(56	)	$	2	$	—	$	—	$	16		$	21	$	(144	)
Interest rate contract		(11	)		(2	)		(1	)		—		—		—		2			—		(12	)
Other assets (1)		92			—			4			—		—		—		—			—		96
Total	$	22		$	(70	)	$	(53	)	$	2	$	—	$	—	$	18		$	21	$	(60	)
CECONY
Derivatives:
Commodity	$	(5	)	$	(14	)	$	(37	)	$	—	$	—	$	—	$	(2	)	$	21	$	(37	)
Other assets (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.

- Definition

Tabular disclosure of 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. Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 33

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 6

-Footnote 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19190-110258

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19279-110258

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19296-110258

+ Details

New Financial Accounting Standards	9 Months Ended
New Financial Accounting Standards	Sep. 30, 2011
New Financial Accounting Standards	Note K — New Financial Accounting Standards In May 2011, the Financial Accounting Standards Board (FASB) issued amendments to the guidance for fair value measurement through Accounting Standards Update (ASU) No. 2011-04, "Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs." The amendments expand Accounting Standards Codification 820's existing disclosure requirements for fair value measurements and makes other amendments. Many of these amendments were made to eliminate unnecessary wording differences between U.S. generally accepted accounting principles and International Financial Reporting Standards. For public entities, the amendments are effective prospectively during interim and annual periods beginning after December 15, 2011. The application of this guidance is not expected to have a material impact on the companies' financial position, results of operations and liquidity. In June 2011, the FASB issued new guidance for presentation of comprehensive income through ASU No. 2011-05, "Comprehensive Income (Topic 220): Presentation of Comprehensive Income." The amendments require that the comprehensive income be presented either in a single continuous statement of comprehensive income or in two separate but consecutive statements. In the two-statement approach, the first statement should present total net income and its components followed consecutively by a second statement that should present total other comprehensive income, the components of other comprehensive income, and the total of comprehensive income. The amendments in this update are applicable retrospectively for public entities effective for fiscal years, and interim periods within those years, beginning after December 15, 2011. Early adoption is permitted. The application of this guidance does not have a material impact on the companies' financial position, results of operations and liquidity. In September 2011, the FASB issued amendments to the guidance for goodwill impairment testing through ASU No. 2011-08, "Intangibles-Goodwill and Other (Topic 350): Testing Goodwill for Impairment." The amendments provide guidance that exempts an entity from calculating the fair value of a reporting unit, if on an initial assessment of qualitative factors it is more likely than not that the fair value of a reporting unit is greater than its carrying amount. For public entities, the amendments are effective for interim and annual goodwill tests performed for years beginning after December 15, 2011. The application of this guidance is not expected to have a material impact on the Companies' financial position, results of operations or liquidity. In September 2011, the FASB issued amendments to guidance for disclosures related to retirement benefits through ASU No. 2011-09, "Compensation—Retirement Benefits—Multiemployer Plans (Subtopic 715-80): Disclosures about an Employer's Participation in a Multiemployer Plan." The amendment provides guidance that requires employers to provide additional separate disclosures for multiemployer pension plans and multiemployer other postretirement benefit plans about the commitments an employer has made to a multiemployer plan and the potential future cash flow implication of participation in such a plan. For public entities, the amendments are effective for interim and annual periods ending after December 15, 2011. The application of this guidance is not expected to have a material impact on the companies' financial position, results of operations or liquidity.
CECONY [Member]
New Financial Accounting Standards	Note K — New Financial Accounting Standards In May 2011, the Financial Accounting Standards Board (FASB) issued amendments to the guidance for fair value measurement through Accounting Standards Update (ASU) No. 2011-04, "Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs." The amendments expand Accounting Standards Codification 820's existing disclosure requirements for fair value measurements and makes other amendments. Many of these amendments were made to eliminate unnecessary wording differences between U.S. generally accepted accounting principles and International Financial Reporting Standards. For public entities, the amendments are effective prospectively during interim and annual periods beginning after December 15, 2011. The application of this guidance is not expected to have a material impact on the companies' financial position, results of operations and liquidity. In June 2011, the FASB issued new guidance for presentation of comprehensive income through ASU No. 2011-05, "Comprehensive Income (Topic 220): Presentation of Comprehensive Income." The amendments require that the comprehensive income be presented either in a single continuous statement of comprehensive income or in two separate but consecutive statements. In the two-statement approach, the first statement should present total net income and its components followed consecutively by a second statement that should present total other comprehensive income, the components of other comprehensive income, and the total of comprehensive income. The amendments in this update are applicable retrospectively for public entities effective for fiscal years, and interim periods within those years, beginning after December 15, 2011. Early adoption is permitted. The application of this guidance does not have a material impact on the companies' financial position, results of operations and liquidity. In September 2011, the FASB issued amendments to the guidance for goodwill impairment testing through ASU No. 2011-08, "Intangibles-Goodwill and Other (Topic 350): Testing Goodwill for Impairment." The amendments provide guidance that exempts an entity from calculating the fair value of a reporting unit, if on an initial assessment of qualitative factors it is more likely than not that the fair value of a reporting unit is greater than its carrying amount. For public entities, the amendments are effective for interim and annual goodwill tests performed for years beginning after December 15, 2011. The application of this guidance is not expected to have a material impact on the Companies' financial position, results of operations or liquidity. In September 2011, the FASB issued amendments to guidance for disclosures related to retirement benefits through ASU No. 2011-09, "Compensation—Retirement Benefits—Multiemployer Plans (Subtopic 715-80): Disclosures about an Employer's Participation in a Multiemployer Plan." The amendment provides guidance that requires employers to provide additional separate disclosures for multiemployer pension plans and multiemployer other postretirement benefit plans about the commitments an employer has made to a multiemployer plan and the potential future cash flow implication of participation in such a plan. For public entities, the amendments are effective for interim and annual periods ending after December 15, 2011. The application of this guidance is not expected to have a material impact on the companies' financial position, results of operations or liquidity.

Summary Of Significant Accounting Policies (Policy)

9 Months Ended

Sep. 30, 2011

Summary Of Significant Accounting Policies [Abstract]

Earnings Per Common Share

Earnings Per Common Share

For the three and nine months ended September 30, 2011 and 2010, Con Edison's basic and diluted EPS for Con Edison are calculated as follows:


	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
*(Millions of Dollars, except per share amounts/Shares in Millions)*	2011		2010		2011		2010
Net income for common stock	$	383	$	350	$	860	$	759
Weighted average common shares outstanding – Basic		292.9		283.0		292.5		282.2
Add: Incremental shares attributable to effect of potentially dilutive securities		1.7		1.6		1.7		1.5
Adjusted weighted average common shares outstanding – Diluted		294.6		284.6		294.2		283.7
Net income for common stock per common share – basic	$	1.31	$	1.24	$	2.94	$	2.69
Net income for common stock per common share – diluted	$	1.30	$	1.23	$	2.92	$	2.68

- Definition

Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.

+ References+ Details

Summary Of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2011

Summary Of Significant Accounting Policies [Abstract]

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)*	2011		2010		2011		2010
Net income for common stock	$	383	$	350	$	860	$	759
Weighted average common shares outstanding – Basic		292.9		283.0		292.5		282.2
Add: Incremental shares attributable to effect of potentially dilutive securities		1.7		1.6		1.7		1.5
Adjusted weighted average common shares outstanding – Diluted		294.6		284.6		294.2		283.7
Net income for common stock per common share – basic	$	1.31	$	1.24	$	2.94	$	2.69
Net income for common stock per common share – diluted	$	1.30	$	1.23	$	2.92	$	2.68

- Definition

Tabular disclosure of the effect of income (loss) on an entity's diluted earnings per share.

+ References+ Details

Regulatory Matters (Tables)

9 Months Ended

Sep. 30, 2011

Regulatory Matters [Abstract]

Regulatory Assets And Liabilities


	Con Edison				CECONY
*(Millions of Dollars)*	2011		2010		2011		2010
Regulatory assets
Unrecognized pension and other postretirement costs	$	3,769	$	4,371	$	3,584	$	4,152
Future federal income tax		1,763		1,593		1,688		1,515
Environmental remediation costs		681		695		563		574
Pension and other post retirement benefits deferrals		198		138		156		90
Revenue taxes		160		145		155		140
Surcharge for New York State assessment		150		121		138		112
Net electric deferrals		126		156		126		156
Deferred storm costs		81		57		61		43
O&R transition bond charges		45		48		—		—
Deferred derivative losses – long-term		34		74		21		48
Workers' compensation		25		31		24		31
Accrued unbilled revenues		22		—		22		—
Property tax reconciliation		12		34		—		27
World Trade Center restoration costs		9		45		9		45
Recoverable energy cost		2		42		2		42
Other		129		133		119		122
Regulatory assets – long-term		7,206		7,683		6,668		7,097
Deferred derivative losses – current		110		190		90		151
Recoverable energy costs – current		—		13		—		—
Regulatory assets – current		110		203		90		151
Total Regulatory Assets	$	7,316	$	7,886	$	6,758	$	7,248
Regulatory liabilities
Allowance for cost of removal less salvage	$	440	$	422	$	365	$	350
World Trade Center settlement proceeds		62		—		62		—
Carrying charges on transmission and distribution net plant		39		28		12		5
Bonus depreciation		24		1		23		1
Energy efficiency programs		23		12		21		11
Gas line losses		21		—		21		—
New York State tax refund		20		30		20		30
Gain on sale of properties		14		28		14		28
Expenditure prudence proceeding		11		—		11		—
Other		167		131		157		122
Regulatory liabilities – long-term		821		652		706		547
Net unbilled revenue deferrals – current		116		136		115		135
Revenue decoupling mechanism		99		38		99		38
Refundable energy cost – current		38		117		13		91
Deferred derivative gains – current		4		4		3		3
Regulatory liabilities – current		257		295		230		267
Total Regulatory Liabilities	$	1,078	$	947	$	936	$	814

Pension Benefits (Tables) (Pension Benefits [Member])

9 Months Ended

Sep. 30, 2011

Pension Benefits [Member]

Net Periodic Pension Benefit Costs


	For the Three Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2011			2010			2011			2010
Service cost – including administrative expenses	$	48		$	42		$	45		$	39
Interest cost on projected benefit obligation		140			139			131			130
Expected return on plan assets		(184	)		(175	)		(174	)		(167	)
Amortization of net actuarial loss		133			106			126			100
Amortization of prior service costs		2			2			—			2
NET PERIODIC BENEFIT COST	$	139		$	114		$	128		$	104
Amortization of regulatory asset		—			—			—			—
TOTAL PERIODIC BENEFIT COST	$	139		$	114		$	128		$	104
Cost capitalized		(45	)		(40	)		(42	)		(36	)
Cost deferred		(11	)		(29	)		(11	)		(29	)
Cost charged to operating expenses	$	83		$	45		$	75		$	39

	For the Nine Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2011			2010			2011			2010
Service cost – including administrative expenses	$	142		$	126		$	133		$	117
Interest cost on projected benefit obligation		420			417			393			390
Expected return on plan assets		(550	)		(527	)		(524	)		(501	)
Amortization of net actuarial loss		397			318			376			300
Amortization of prior service costs		6			6			4			6
NET PERIODIC BENEFIT COST	$	415		$	340		$	382		$	312
Amortization of regulatory asset*		1			1			1			1
TOTAL PERIODIC BENEFIT COST	$	416		$	341		$	383		$	313
Cost capitalized		(141	)		(118	)		(131	)		(109	)
Cost deferred		(68	)		(85	)		(70	)		(82	)
Cost charged to operating expenses	$	207		$	138		$	182		$	122

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

- Definition

Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5, 6, 7

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 158

-Paragraph 4, 7, 16, 20, 21

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 55

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=6930749&loc=d3e4179-114921

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e2410-114920

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e2439-114920

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e2417-114920

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Other Postretirement Benefits (Tables) (Other Postretirement Benefits [Member])

9 Months Ended

Sep. 30, 2011

Other Postretirement Benefits [Member]

Net Periodic Postretirement Benefit Costs


	For the Three Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2011			2010			2011			2010
Service cost	$	7		$	6		$	5		$	5
Interest cost on accumulated other postretirement benefit obligation		20			23			18			20
Expected return on plan assets		(22	)		(22	)		(21	)		(19	)
Amortization of net actuarial loss		22			23			20			21
Amortization of prior service cost		(3	)		(3	)		(3	)		(4	)
Amortization of transition obligation		1			1			1			1
NET PERIODIC POSTRETIREMENT BENEFIT COST	$	25		$	28		$	20		$	24
Cost capitalized		(9	)		(10	)		(7	)		(8	)
Cost deferred		3			2			3			1
Cost charged to operating expenses	$	19		$	20		$	16		$	17

	For the Nine Months Ended September 30,
	Con Edison						CECONY
*(Millions of Dollars)*	2011			2010			2011			2010
Service cost	$	19		$	18		$	15		$	15
Interest cost on accumulated other postretirement benefit obligation		62			69			54			60
Expected return on plan assets		(66	)		(66	)		(59	)		(57	)
Amortization of net actuarial loss		66			69			60			63
Amortization of prior service cost		(7	)		(9	)		(9	)		(12	)
Amortization of transition obligation		3			3			3			3
NET PERIODIC POSTRETIREMENT BENEFIT COST	$	77		$	84		$	64		$	72
Cost capitalized		(27	)		(30	)		(22	)		(25	)
Cost deferred		12			2			10			(1	)
Cost charged to operating expenses	$	62		$	56		$	52		$	46

- Definition

+ References

+ Details

Environmental Matters (Tables)

9 Months Ended

Sep. 30, 2011

Environmental Matters [Abstract]

Accrued Liabilities And Regulatory Assets


	Con Edison				CECONY
*(Millions of Dollars)*	2011		2010		2011		2010
Accrued Liabilities:
Manufactured gas plant sites	$	432	$	446	$	314	$	327
Other Superfund Sites		64		66		63		65
Total	$	496	$	512	$	377	$	392
Regulatory assets	$	681	$	695	$	563	$	574

Environmental Remediation Costs


	For the Three Months Ended September 30,
	Con Edison				CECONY
*(Millions of Dollars)*	2011		2010		2011		2010
Remediation costs incurred	$	9	$	9	$	9	$	8

	For the Nine Months Ended September 30,
	Con Edison				CECONY
*(Millions of Dollars)*	2011		2010		2011		2010
Remediation costs incurred	$	24	$	32	$	22	$	30

Accrued Liabilities For Asbestos Suits And Workers' Compensation Proceedings


	Con Edison				CECONY
*(Millions of Dollars)*	2011		2010		2011		2010
Accrued liability – asbestos suits	$	10	$	10	$	10	$	10
Regulatory assets – asbestos suits	$	10	$	10	$	10	$	10
Accrued liability – workers' compensation	$	99	$	106	$	94	$	101
Regulatory assets – workers' compensation	$	25	$	31	$	24	$	31

Other Material Contingencies (Tables)

9 Months Ended

Sep. 30, 2011

Other Material Contingencies [Abstract]

Total Guarantees


Guarantee Type	0 – 3 years		4 – 10 years		> 10 years		Total
	*(Millions of Dollars)*
Energy transactions	$	652	$	3	$	153	$	808
Intra-company guarantees		15		—		1		16
Other guarantees		25		13		—		38
TOTAL	$	692	$	16	$	154	$	862

- Definition

Tabular disclosure of each guarantee obligation, or each group of similar guarantee obligations, including (a) the nature of the guarantee, including its term, how it arose, and the events or circumstances that would require the guarantor to perform under the guarantee; (b) the maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee; (c) the current carrying amount of the liability, if any, for the guarantor's obligations under the guarantee; and (d) the nature of any recourse provisions under the guarantee, and any assets held either as collateral or by third parties, and any relevant related party disclosure. Excludes disclosures about product warranties.

+ References+ Details

Financial Information By Business Segment (Tables)

9 Months Ended

Sep. 30, 2011

Financial Information By Business Segment [Abstract]

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)*	2011			2010			2011			2010			2011		2010		2011			2010
CECONY
Electric	$	2,644		$	2,570		$	3		$	3		$	166	$	156	$	758		$	715
Gas		197			204			1			1			28		26		(23	)		(16	)
Steam		76			91			20			18			15		16		(33	)		(33	)
Consolidation adjustments		—			—			(24	)		(22	)		—		—		—			—
Total CECONY	$	2,917		$	2,865		$	—		$	—		$	209	$	198	$	702		$	666
O&R
Electric	$	217		$	245		$	—		$	—		$	9	$	8	$	44		$	52
Gas		24			25			—			—			3		3		(6	)		(4	)
Total O&R	$	241		$	270		$	—		$	—		$	12	$	11	$	38		$	48
Competitive energy businesses	$	472		$	584		$	3		$	2		$	1	$	2	$	16		$	(8	)
Other*		(1	)		(12	)		(3	)		(2	)		—		—		—			(1	)
Total Con Edison	$	3,629		$	3,707		$	—		$	—		$	222	$	211	$	756		$	705

*	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)*	2011			2010			2011			2010			2011		2010		2011			2010
CECONY
Electric	$	6,378		$	6,402		$	9		$	9		$	489	$	464	$	1,326		$	1,228
Gas		1,156			1,126			4			4			82		76		212			243
Steam		508			487			59			55			47		46		81			41
Consolidation adjustments		—			—			(72	)		(68	)		—		—		—			—
Total CECONY	$	8,042		$	8,015		$	—		$	—		$	618	$	586	$	1,619		$	1,512
O&R
Electric	$	507		$	559		$	—		$	—		$	26	$	24	$	69		$	71
Gas		153			150			—			—			10		9		22			20
Total O&R	$	660		$	709		$	—		$	—		$	36	$	33	$	91		$	91
Competitive energy businesses	$	1,286		$	1,491		$	9		$	6		$	5	$	7	$	75		$	25
Other*		(16	)		(30	)		(9	)		(6	)		—		—		(2	)		(1	)
Total Con Edison	$	9,972		$	10,185		$	—		$	—		$	659	$	626	$	1,781		$	1,627

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

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References+ Details

Derivative Instruments And Hedging Activities (Tables)

9 Months Ended

Sep. 30, 2011

Derivative Instruments And Hedging Activities [Abstract]

Energy Price Hedging Fair Values


	Con Edison						CECONY
*(Millions of Dollars)*	2011			2010			2011			2010
Fair value of net derivative assets/(liabilities) – gross	$	(115	)	$	(261	)	$	(62	)	$	(156	)
Impact of netting of cash collateral		73			176			41			104
Fair value of net derivative assets/(liabilities) – net	$	(42	)	$	(85	)	$	(21	)	$	(52	)

Fair Values Of The Companies' Commodity Derivatives


*(Millions of Dollars)*	Fair Value of Commodity Derivatives (a) Balance Sheet Location	Con Edison			CECONY
Derivative Assets
Current	Other current assets	$	112		$	41
Long-term	Other deferred charges and non-current assets		36			23
Total derivative assets		$	148		$	64
Impact of netting			(68	)		(25	)
Net derivative assets		$	80		$	39
Derivative Liabilities
Current	Fair value of derivative liabilities	$	209		$	95
Long-term	Fair value of derivative liabilities		54			31
Total derivative liabilities		$	263		$	126
Impact of netting			(141	)		(66	)
Net derivative liabilities		$	122		$	60

(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 values of the Companies' commodity derivatives at December 31, 2010 were:


*(Millions of Dollars)*	Fair Value of Commodity Derivatives (a) Balance Sheet Location	Con Edison			CECONY
Derivative Assets
Current	Other current assets	$	184		$	29
Long-term	Other deferred charges and non-current assets		51			19
Total derivative assets		$	235		$	48
Impact of netting			(129	)		—
Net derivative assets		$	106		$	48
Derivative Liabilities
Current	Fair value of derivative liabilities	$	385		$	148
Long-term	Fair value of derivative liabilities		111			56
Total derivative liabilities		$	496		$	204
Impact of netting			(305	)		(104	)
Net derivative liabilities		$	191		$	100

(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


Realized and Unrealized Gains/(Losses) on Commodity Derivatives (a) Deferred or Recognized in Income for the three months ended September 30, 2011
*(Millions of Dollars)*	Balance Sheet Location	Con Edison			CECONY
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations:
Current	Deferred derivative gains	$	(2	)	$	(1	)
Long-term	Regulatory liabilities		1			1
Total deferred gains		$	(1	)	$	—
Current	Deferred derivative losses	$	12		$	7
Current	Recoverable energy costs		(75	)		(53	)
Long-term	Regulatory assets		10			6
Total deferred losses		$	(53	)	$	(40	)
Net deferred losses		$	(54	)	$	(40	)
	Income Statement Location
Pre-tax gain/(loss) recognized in income
	Purchased power expense	$	29	(b)	$	—
	Gas purchased for resale		6			—
	Non-utility revenue		5	(b)		—
Total pre-tax gain/(loss) recognized in income		$	40		$	—

(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, 2011 Con Edison recorded in non-utility operating revenues and purchased power expense an unrealized pre-tax (loss) of $(10) million and $(1) million, respectively.


Realized and Unrealized Gains/(Losses) on Commodity Derivatives (a) Deferred or Recognized in Income for the nine months ended September 30, 2011
*(Millions of Dollars)*	Balance Sheet Location	Con Edison			CECONY
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations:
Current	Deferred derivative gains	$	—		$	—
Long-term	Regulatory liabilities		3			3
Total deferred gains		$	3		$	3
Current	Deferred derivative losses	$	80		$	61
Current	Recoverable energy costs		(177	)		(134	)
Long-term	Regulatory assets		38			27
Total deferred losses		$	(59	)	$	(47	)
Net deferred losses		$	(56	)	$	(44	)
	Income Statement Location
Pre-tax gain/(loss) recognized in income
	Purchased power expense	$	81	(b)	$	—
	Gas purchased for resale		17			—
	Non-utility revenue		22	(b)		—
Total pre-tax gain/(loss) recognized in income		$	120		$	—

(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, 2011, Con Edison recorded in non-utility operating revenues and purchased power expense an unrealized pre-tax (loss)/gain of $(35) million and $59 million, respectively.

The following tables present 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	)(b)	$	—
	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.

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		810		16,479,730		73		8,201		682		98,382,500		1,565
CECONY		146		4,025,375		—		—		466		90,710,000		612

(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	$	128		$	70
Collateral posted	$	34	(b)	$	29	(b)
Additional collateral (c) (downgrade one level from current ratings (d))	$	11		$	9
Additional collateral (c) (downgrade to below investment grade from current ratings (d))	$	143	(e)	$	54	(e)

(a)

(b)	Across the Utilities' energy derivative positions, credit limits for the same counterparties are generally integrated. At September 30, 2011, the Utilities posted combined collateral of $34 million, including an estimated $5 million attributable to O&R.

(c)

(d)

(e)	Derivative instruments that are net assets have been excluded from the table. At September 30, 2011, if Con Edison had been downgraded to below investment grade, it would have been required to post additional collateral for such derivative instruments of an estimated $16 million.

- Definition

Tabular disclosure of credit derivatives which includes 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, but not limited to, a credit-linked note).

+ References+ Details

- Definition

Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges.

+ References+ Details

- Definition

Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position.

+ References+ Details

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

+ References

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+ Details

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2011

Fair Value Measurements [Abstract]

Assets And Liabilities Measured At Fair Value On A Recurring Basis


	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	$	2	$	—	$	52		$	28		$	69		$	17		$	(44	)	$	(6	)	$	79		$	39
Transfer in (5) (6)		1		1		—			—			—			—			—			—			1			1
Transfer out (5) (6)		—		—		(1	)		(1	)		—			—			—			—			(1	)		(1	)
Commodity (1)		3		1		51			27			69			17			(44	)		(6	)		79			39
Other assets (3)		75		75		—			—			100			91			—			—			175			166
Total	$	78	$	76	$	51		$	27		$	169		$	108		$	(44	)	$	(6	)	$	254		$	205
Derivative liabilities:
Commodity	$	10	$	5	$	130		$	91		$	98		$	11		$	(117	)	$	(47	)	$	121		$	60
Transfer in (5) (7)		—		—		23			8			1			1			—			—			24			9
Transfer out (5) (7)		—		—		(1	)		(1	)		(23	)		(8	)		—			—			(24	)		(9	)
Commodity (1)	$	10	$	5	$	152		$	98		$	76		$	4		$	(117	)	$	(47	)	$	121		$	60
Interest rate contract (2)		—		—		—			—			9			—			—			—			9			—
Total	$	10	$	5	$	152		$	98		$	85		$	4		$	(117	)	$	(47	)	$	130		$	60

(1)

(2)	See Note I.

(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 1 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 December 31, 2010 to less than one year as of September 30, 2011.

Assets and liabilities measured at fair value on a recurring basis as of December 31, 2010 are summarized as follows:


	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)	$	2	$	1	$	72		$	21		$	144		$	13		$	(112	)	$	13		$	106		$	48
Other assets (3)		65		64		—			—			101			92			—			—			166			156
Total	$	67	$	65	$	72		$	21		$	245		$	105		$	(112	)	$	13		$	272		$	204
Derivative liabilities:
Commodity	$	4	$	2	$	270		$	177		$	205		$	12		$	(288	)	$	(91	)	$	191		$	100
Transfer in (5) (6) (7)		—		—		(36	)		(36	)		(9	)		(9	)		—			—			(45	)		(45	)
Transfer out (5) (6) (7)		—		—		9			9			36			36			—			—			45			45
Commodity (1)	$	4	$	2	$	243		$	150		$	232		$	39		$	(288	)	$	(91	)	$	191		$	100
Interest rate contract (2)		—		—		—			—			10			—			—			—			10			—
Total	$	4	$	2	$	243		$	150		$	242		$	39		$	(288	)	$	(91	)	$	201		$	100

(1)

(2)	See Note I.

(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 December 31, 2009 to less than one year as of December 31, 2010.

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, 2011
				Total Gains/(Losses)— Realized and Unrealized
*(Millions of Dollars)*	Beginning Balance as of July 1, 2011			Included in Earnings			Included in Regulatory Assets and Liabilities			Purchases		Issuances		Sales		Settlements		Transfer In/Out of Level 3		Ending Balance as of September 30, 2011
Con Edison
Derivatives:
Commodity	$	(25	)	$	(27	)	$	9		$	8	$	—	$	—	$	4	$	24	$	(7	)
Interest rate contract		(10	)		(1	)		1			—		—		—		1		—		(9	)
Other assets (1)		106			(3	)		(3	)		—		—		—		—		—		100
Total	$	71		$	(31	)	$	7		$	8	$	—	$	—	$	5	$	24	$	84
CECONY
Derivatives:
Commodity	$	—		$	(8	)	$	1		$	8	$	—	$		$	3	$	9	$	13
Other assets (1)		96			(3	)		(2	)		—		—				—		—		91
Total	$	96		$	(11	)	$	(1	)	$	8	$	—	$		$	3	$	9	$	104

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


	For the Nine Months Ended September 30, 2011
				Total Gains/(Losses)— Realized and Unrealized
*(Millions of Dollars)*	Beginning Balance as of January 1, 2011			Included in Earnings			Included in Regulatory Assets and Liabilities			Purchases		Issuances		Sales		Settlements			Transfer In/Out of Level 3		Ending Balance as of September 30, 2011
Con Edison
Derivatives:
Commodity	$	(88	)	$	(5	)	$	54		$	22	$	—	$	—	$	(19	)	$	29	$	(7	)
Interest rate contract		(10	)		(3	)		1			—		—		—		3			—		(9	)
Other assets (1)		101			—			(1	)		—		—		—		—			—		100
Total	$	3		$	(8	)	$	54		$	22	$	—	$	—	$	(16	)	$	29	$	84
CECONY
Derivatives:
Commodity	$	(26	)	$	(11	)	$	22		$	18	$	—	$	—	$	(4	)	$	14	$	13
Other assets (1)		92			—			(1	)		—		—		—		—			—		91
Total	$	66		$	(11	)	$	21		$	18	$	—	$	—	$	(4	)	$	14	$	104

(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, 2010 and classified as Level 3 in the fair value hierarchy below.


	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		Settlements		Transfer In/Out of Level 3			Ending Balance as of September 30, 2010
Con Edison
Derivatives:
Commodity	$	(101	)	$	(34	)	$	(12	)	$	1	$	—	$	—	$	4	$	(2	)	$	(144	)
Interest rate contract		(12	)		—			—			—		—		—		—		—			(12	)
Other assets (1)		94			—			2			—		—		—		—		—			96
Total	$	(19	)	$	(34	)	$	(10	)	$	1	$	—	$	—	$	4	$	(2	)	$	(60	)
CECONY
Derivatives:
Commodity	$	(30	)	$	(7	)	$	(3	)	$	1	$	—	$	—	$	4	$	(2	)	$	(37	)
Other assets (1)		85			—			2			—		—		—		—		—			87
Total	$	55		$	(7	)	$	(1	)	$	1	$	—	$	—	$	4	$	(2	)	$	50

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


	For 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		Settlements			Transfer In/Out of Level 3		Ending Balance as of September 30, 2010
Con Edison
Derivatives:
Commodity	$	(59	)	$	(68	)	$	(56	)	$	2	$	—	$	—	$	16		$	21	$	(144	)
Interest rate contract		(11	)		(2	)		(1	)		—		—		—		2			—		(12	)
Other assets (1)		92			—			4			—		—		—		—			—		96
Total	$	22		$	(70	)	$	(53	)	$	2	$	—	$	—	$	18		$	21	$	(60	)
CECONY
Derivatives:
Commodity	$	(5	)	$	(14	)	$	(37	)	$	—	$	—	$	—	$	(2	)	$	21	$	(37	)
Other assets (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.

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, 2011	Jun. 30, 2011	Mar. 31, 2011	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Sep. 30, 2011	Sep. 30, 2010
Summary Of Significant Accounting Policies [Abstract]
Net income for common stock	$ 383	$ 165	$ 311	$ 350	$ 183	$ 226	$ 860	$ 759
Weighted average common shares outstanding - Basic	292.9			283.0			292.5	282.2
Add: Incremental shares attributable to effect of potentially dilutive securities	1.7			1.6			1.7	1.5
Adjusted weighted average common shares outstanding - Diluted	294.6			284.6			294.2	283.7
Net income for common stock per common share - basic	$ 1.31			$ 1.24			$ 2.94	$ 2.69
Net income for common stock per common share - diluted	$ 1.30			$ 1.23			$ 2.92	$ 2.68

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 07-4

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 36, 37, 38

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 20

Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References+ Details

- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of contingently issuable shares. Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met.

+ References+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 171

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Glossary Weighted-Average Number of Common Shares Outstanding

-URI http://asc.fasb.org/extlink&oid=6528421

Reference 7: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Regulatory Matters (Regulatory Assets And Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2011	Dec. 31, 2010
Regulatory Assets [Line Items]
Regulatory assets	$ 7,206	$ 7,683
Regulatory assets - current	110	203
Total Regulatory Assets	7,316	7,886
Regulatory liabilities	821	652
Regulatory liabilities - current	257	295
Total Regulatory Liabilities	1,078	947
Unrecognized Pension And Other Postretirement Costs [Member]
Regulatory Assets [Line Items]
Regulatory assets	3,769	4,371
Future Federal Income Tax [Member]
Regulatory Assets [Line Items]
Regulatory assets	1,763	1,593
Environmental Remediation Costs [Member]
Regulatory Assets [Line Items]
Regulatory assets	681	695
Pension And Other Post Retirement Benefits Deferrals [Member]
Regulatory Assets [Line Items]
Regulatory assets	198	138
Revenue Taxes [Member]
Regulatory Assets [Line Items]
Regulatory assets	160	145
Surcharge For New York State Assessment [Member]
Regulatory Assets [Line Items]
Regulatory assets	150	121
Net Electric Deferrals [Member]
Regulatory Assets [Line Items]
Regulatory assets	126	156
Deferred Storm Costs [Member]
Regulatory Assets [Line Items]
Regulatory assets	81	57
O & R Transition Bond Charges [Member]
Regulatory Assets [Line Items]
Regulatory assets	45	48
Deferred Derivative Losses - Long-Term [Member]
Regulatory Assets [Line Items]
Regulatory assets	34	74
Workers' Compensation [Member]
Regulatory Assets [Line Items]
Regulatory assets	25	31
Accrued Unbilled Revenues [Member]
Regulatory Assets [Line Items]
Regulatory assets	22
Property Tax Reconciliation [Member]
Regulatory Assets [Line Items]
Regulatory assets	12	34
World Trade Center Restoration Costs [Member]
Regulatory Assets [Line Items]
Regulatory assets	9	45
Recoverable Energy Cost [Member]
Regulatory Assets [Line Items]
Regulatory assets	2	42
Other [Member]
Regulatory Assets [Line Items]
Regulatory assets	129	133
Deferred Derivative Losses - Current [Member]
Regulatory Assets [Line Items]
Regulatory assets - current	110	190
Recoverable Energy Costs - Current [Member]
Regulatory Assets [Line Items]
Regulatory assets - current		13
Allowance For Cost Of Removal Less Salvage [Member]
Regulatory Assets [Line Items]
Regulatory liabilities	440	422
World Trade Center Settlement Proceeds [Member]
Regulatory Assets [Line Items]
Regulatory liabilities	62
Carrying Charges On Transmission And Distribution Net Plant [Member]
Regulatory Assets [Line Items]
Regulatory liabilities	39	28
Bonus Depreciation [Member]
Regulatory Assets [Line Items]
Regulatory liabilities	24	1
Energy Efficiency Programs [Member]
Regulatory Assets [Line Items]
Regulatory liabilities	23	12
Gas Line Losses [Member]
Regulatory Assets [Line Items]
Regulatory liabilities	21
New York State Tax Refund [Member]
Regulatory Assets [Line Items]
Regulatory liabilities	20	30
Gain On Sale Of Properties [Member]
Regulatory Assets [Line Items]
Regulatory liabilities	14	28
Expenditure Prudence Proceeding [Member]
Regulatory Assets [Line Items]
Regulatory liabilities	11
Other Liabilities [Member]
Regulatory Assets [Line Items]
Regulatory liabilities	167	131
Net Unbilled Revenue Deferrals - Current [Member]
Regulatory Assets [Line Items]
Regulatory liabilities - current	116	136
Revenue Decoupling Mechanism [Member]
Regulatory Assets [Line Items]
Regulatory liabilities	99	38
Refundable Energy Cost - Current [Member]
Regulatory Assets [Line Items]
Regulatory liabilities - current	38	117
Deferred Derivative Gains - Current [Member]
Regulatory Assets [Line Items]
Regulatory liabilities - current	$ 4	$ 4

- Definition

Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost.

+ References+ Details

Short-Term Borrowing (Details) (USD $)	9 Months Ended
Short-Term Borrowing (Details) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Short-term Debt [Line Items]
Credit facility expiry date	October 2016
Maximum borrowing capacity	$ 2,250,000,000
Current amount available	1,000,000,000
Line of credit facility, covenant terms	ratio of consolidated debt to consolidated total capital of 0.65 to 1 (at September 30, 2011 this ratio was 0.48 to 1 for Con Edison and CECONY); having liens on its assets in an aggregate amount exceeding 5 percent of its consolidated total capital, subject to certain exceptions; and the failure, following any applicable notice period, to meet certain other customary covenants.
Commercial paper outstanding	0	0
Loans outstanding under Credit Agreement, amount	0	0
Letters of credit outstanding under the credit agreement	223,000,000	197,000,000
Letter Of Credit [Member]
Short-term Debt [Line Items]
Current amount available	$ 1,200,000,000

- Definition

Unsecured short-term debt instrument issued by corporations which are highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

+ References+ Details

- Definition

This is the sum of principal amount outstanding for both securitized and unsecuritized loans of all types.

+ References+ Details

Pension Benefits (Net Periodic Pension Benefit Costs) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2011
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - including administrative expenses	$ 48	$ 42	$ 142	$ 126
Interest cost on projected benefit obligation	140	139	420	417
Expected return on plan assets	(184)	(175)	(550)	(527)
Amortization of net actuarial loss	133	106	397	318
Amortization of prior service costs	2	2	6	6
NET PERIODIC BENEFIT COST	139	114	415	340
Amortization of regulatory asset			1	1
TOTAL PERIODIC BENEFIT COST	139	114	416	341
Cost capitalized	(45)	(40)	(141)	(118)
Cost deferred	(11)	(29)	(68)	(85)
Cost charged to operating expenses	83	45	207	138
Estimated future employer contributions		434		434	533
Companies [Member] \| Non-Qualified Supplemental Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Non-qualified supplement pension plan, funded	$ 11		$ 11

Other Postretirement Benefits (Net Periodic Postretirement Benefit Costs) (Details) (Other Postretirement Benefits [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 7	$ 6	$ 19	$ 18
Interest cost on accumulated other postretirement benefit obligation	20	23	62	69
Expected return on plan assets	(22)	(22)	(66)	(66)
Amortization of net actuarial loss	22	23	66	69
Amortization of prior service cost	(3)	(3)	(7)	(9)
Amortization of transition obligation	1	1	3	3
NET PERIODIC POSTRETIREMENT BENEFIT COST	25	28	77	84
Cost capitalized	(9)	(10)	(27)	(30)
Cost deferred	3	2	12	2
Cost charged to operating expenses	19	20	62	56
Expected contributions	84		84
Contribution other postretirement benefit plans			$ 35

Environmental Matters (Accrued Liabilities And Regulatory Assets) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2011	Dec. 31, 2010
Site Contingency [Line Items]
Regulatory assets	$ 7,316	$ 7,886
Manufactured Gas Plant Sites [Member]
Site Contingency [Line Items]
Accrued liabilities	432	446
Other Superfund Sites [Member]
Site Contingency [Line Items]
Accrued liabilities	64	66
Superfund Sites [Member]
Site Contingency [Line Items]
Accrued liabilities	496	512
Regulatory assets	$ 681	$ 695

- Definition

Total costs accrued as of the balance sheet date for environmental loss contingencies.

+ References+ Details

Environmental Matters (Environmental Remediation Costs) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Environmental Matters [Abstract]
Remediation costs incurred	$ 9	$ 9	$ 24	$ 32

- Definition

The charge against earnings in the period for known or estimated future costs arising from requirements to perform environmental remediation activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 90-8

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 96-1

-Paragraph 170

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9, 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name Statement of Position (SOP)

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-Paragraph 147, 148, 149, 150

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 143

-Paragraph 2

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

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-Paragraph 28

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 410

-SubTopic 30

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13296-110859

+ Details

Environmental Matters (Accrued Liability For Asbestos Suits And Workers' Compensation Proceedings) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2011	Dec. 31, 2010
Site Contingency [Line Items]
Regulatory assets	$ 7,316	$ 7,886
Asbestos Suits [Member]
Site Contingency [Line Items]
Accrued liability	10	10
Regulatory assets	10	10
Workers' Compensation [Member]
Site Contingency [Line Items]
Accrued liability	99	106
Regulatory assets	$ 25	$ 31

- Definition

Total costs accrued as of the balance sheet date for environmental loss contingencies.

+ References+ Details

Other Material Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Guarantor Obligations [Line Items]
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	(52)	(41)
Gross investment in leverage leases	234	235
Deferred tax liabilities	286	276
Tax savings from lease in lease out transactions	232
Total guarantees, by type and term	862	859
Maximum exposure	5
Tax Deficiency Paid In December 2005 [Member]
Guarantor Obligations [Line Items]
Tax deficiency paid to IRS	0.3
Interest In April 2006 [Member]
Guarantor Obligations [Line Items]
Interest paid related to tax deficiency	0.2
Interest Up To March 2011 [Member]
Guarantor Obligations [Line Items]
Interest paid related to tax deficiency	86.0
Disallowance Of Tax 1998-2007 [Member]
Guarantor Obligations [Line Items]
Disallowed deduction	416
Disallowance Of Tax 2010 [Member]
Guarantor Obligations [Line Items]
Disallowed deduction	40
Disallowance Of Tax 2009 [Member]
Guarantor Obligations [Line Items]
Disallowed deduction	41
Disallowance Of Tax 2008 [Member]
Guarantor Obligations [Line Items]
Disallowed deduction	$ 42

Other Material Contingencies (Total Guarantees) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2011	Dec. 31, 2010
Guarantor Obligations [Line Items]
Total guarantees, by type and term	$ 862	$ 859
Financial And Performance Guarantee For Commodity Transactions [Member]
Guarantor Obligations [Line Items]
Total guarantees, by type and term	808
Financial And Performance Guarantee For Intra-Company [Member]
Guarantor Obligations [Line Items]
Total guarantees, by type and term	16
Financial And Performance Guarantee Other [Member]
Guarantor Obligations [Line Items]
Total guarantees, by type and term	38
Guarantee Duration, 0-3 Years [Member]
Guarantor Obligations [Line Items]
Total guarantees, by type and term	692
Guarantee Duration, 0-3 Years [Member] \| Financial And Performance Guarantee For Commodity Transactions [Member]
Guarantor Obligations [Line Items]
Total guarantees, by type and term	652
Guarantee Duration, 0-3 Years [Member] \| Financial And Performance Guarantee For Intra-Company [Member]
Guarantor Obligations [Line Items]
Total guarantees, by type and term	15
Guarantee Duration, 0-3 Years [Member] \| Financial And Performance Guarantee Other [Member]
Guarantor Obligations [Line Items]
Total guarantees, by type and term	25
Guarantee Duration, 4-10 Years [Member]
Guarantor Obligations [Line Items]
Total guarantees, by type and term	16
Guarantee Duration, 4-10 Years [Member] \| Financial And Performance Guarantee For Commodity Transactions [Member]
Guarantor Obligations [Line Items]
Total guarantees, by type and term	3
Guarantee Duration, 4-10 Years [Member] \| Financial And Performance Guarantee For Intra-Company [Member]
Guarantor Obligations [Line Items]
Total guarantees, by type and term
Guarantee Duration, 4-10 Years [Member] \| Financial And Performance Guarantee Other [Member]
Guarantor Obligations [Line Items]
Total guarantees, by type and term	13
Guarantee Duration, Greater Than 10 Years [Member]
Guarantor Obligations [Line Items]
Total guarantees, by type and term	154
Guarantee Duration, Greater Than 10 Years [Member] \| Financial And Performance Guarantee For Commodity Transactions [Member]
Guarantor Obligations [Line Items]
Total guarantees, by type and term	153
Guarantee Duration, Greater Than 10 Years [Member] \| Financial And Performance Guarantee For Intra-Company [Member]
Guarantor Obligations [Line Items]
Total guarantees, by type and term	1
Guarantee Duration, Greater Than 10 Years [Member] \| Financial And Performance Guarantee Other [Member]
Guarantor Obligations [Line Items]
Total guarantees, by type and term

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, 2011

Sep. 30, 2010

Sep. 30, 2011

Sep. 30, 2010

Operating revenues

$ 3,629

$ 3,707

$ 9,972

$ 10,185

Depreciation and amortization

222

211

659

626

Operating income

756

705

1,781

1,627

CECONY [Member]

Operating revenues

2,917

2,865

8,042

8,015

Depreciation and amortization

209

198

618

586

Operating income

702

666

1,619

1,512

Consolidation Adjustments [Member]

Inter-segment revenues

(24)

(22)

(72)

(68)

O&R [Member]

Operating revenues

241

270

660

709

Depreciation and amortization

Operating income

CECONY - Electric [Member]

Operating revenues

2,644

2,570

6,378

6,402

Inter-segment revenues

Depreciation and amortization

166

156

489

464

Operating income

758

715

1,326

1,228

CECONY - Gas [Member]

Operating revenues

197

204

1,156

1,126

Inter-segment revenues

Depreciation and amortization

Operating income

(23)

(16)

212

243

CECONY - Steam [Member]

Operating revenues

508

487

Inter-segment revenues

Depreciation and amortization

Operating income

(33)

O&R - Electric [Member]

Operating revenues

217

245

507

559

Depreciation and amortization

Operating income

O&R - Gas [Member]

Operating revenues

153

150

Depreciation and amortization

Operating income

(6)

(4)

Competitive Energy Businesses [Member]

Operating revenues

472

584

1,286

1,491

Inter-segment revenues

Depreciation and amortization

Operating income

(8)

Other Revenues And Eliminations In Segment Information [Member]

Operating revenues

(1)

^[1]

(12)

^[1]

(16)

^[1]

(30)

^[1]

Inter-segment revenues

(3)

^[1]

(2)

^[1]

(9)

^[1]

(6)

^[1]

Operating income

$ (1)

^[1]

$ (2)

^[1]

$ (1)

^[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	9 Months Ended
	Sep. 30, 2011
Schedule of Investments [Line Items]
Energy supply and hedging activities credit exposure total	$ 120
Makeup of net credit exposure counterparties	60
Makeup of net credit exposure primarily with commodity exchange	44
Independent system operators	15
Number of contracts considered derivatives	1,565
Unrealized gain (loss) on derivatives	(9)
Derivative, fixed interest rate	6.09%
Non-Investment Grade Counterparties [Member]
Schedule of Investments [Line Items]
Makeup of net credit exposure primarily with commodity exchange	$ 1

Derivative Instruments And Hedging Activities (Energy Price Hedging Fair Values) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2011	Dec. 31, 2010
Derivative Instruments And Hedging Activities [Abstract]
Fair value of net derivative assets/(liabilities) - gross	$ (115)	$ (261)
Impact of netting of cash collateral	73	176
Fair value of net derivative assets/(liabilities) - net	$ (42)	$ (85)

Derivative Instruments And Hedging Activities (Fair Values Of The Companies' Commodity Derivatives) (Details) (USD $)
In Millions, unless otherwise specified

Sep. 30, 2011

Dec. 31, 2010

Derivatives, Fair Value [Line Items]

Fair value of derivative assets

$ 148

^[1]

$ 235

^[1]

Net derivatives asset

^[1]

106

^[1]

Fair value of derivative liabilities

263

^[1]

496

^[1]

Net derivatives liability

122

^[1]

191

^[1]

Derivative Asset [Member]

Derivatives, Fair Value [Line Items]

Impact of netting

(68)

^[1]

(129)

^[1]

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

Derivatives, Fair Value [Line Items]

Fair value of derivative assets

112

^[1]

184

^[1]

Derivative Asset [Member] | Other Deferred Charges And Non-Current Assets [Member]

Derivatives, Fair Value [Line Items]

Fair value of derivative assets

^[1]

Derivative Liability [Member]

Derivatives, Fair Value [Line Items]

Impact of netting

(141)

^[1]

(305)

^[1]

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

Derivatives, Fair Value [Line Items]

Fair value of derivative liabilities

209

^[1]

385

^[1]

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

Derivatives, Fair Value [Line Items]

Fair value of derivative liabilities

$ 54

^[1]

$ 111

^[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, 2011

Sep. 30, 2010

Sep. 30, 2011

Sep. 30, 2010

Derivatives, Fair Value [Line Items]

Total deferred gains

$ (1)

^[1]

$ 3

^[1]

Total deferred losses

(53)

^[1]

(59)

^[1]

Net deferred losses

(54)

^[1]

(130)

^[1]

(56)

^[1]

(359)

^[1]

Pre-tax gain/(loss) recognized in income

^[1]

(23)

^[1]

120

^[1]

(118)

^[1]

Unrealized gain/(loss) on derivatives, tax

(9)

Purchased Power Expense [Member]

Derivatives, Fair Value [Line Items]

Pre-tax gain/(loss) recognized in income

^[1],[2]

(26)

^[1],[3]

^[1],[4]

(132)

^[1],[5]

Unrealized gain/(loss) on derivatives, tax

(1)

(34)

Gas Purchased For Resale [Member]

Derivatives, Fair Value [Line Items]

Pre-tax gain/(loss) recognized in income

^[1]

(1)

^[1]

(7)

^[1]

Non-Utility Revenue [Member]

Derivatives, Fair Value [Line Items]

Pre-tax gain/(loss) recognized in income

^[1],[2]

^[1],[3]

^[1],[4]

^[1],[5]

Unrealized gain/(loss) on derivatives, tax

(10)

(3)

(35)

(1)

Other Current Liabilities [Member]

Derivatives, Fair Value [Line Items]

Current-Deferred derivative gains

(3)

^[1]

(8)

^[1]

Other Current Assets [Member]

Derivatives, Fair Value [Line Items]

Deferred gain/(loss), asset

(61)

^[1]

(127)

^[1]

Deferred Derivative Gains [Member]

Derivatives, Fair Value [Line Items]

Current-Deferred derivative gains

(2)

^[1]

Regulatory Liabilities, Long Term [Member]

Derivatives, Fair Value [Line Items]

Total deferred gains

^[1]

Deferred Derivative Losses [Member]

Derivatives, Fair Value [Line Items]

Deferred derivative losses, current

^[1]

Recoverable Energy Costs [Member]

Derivatives, Fair Value [Line Items]

Deferred gain/(loss), asset

(75)

^[1]

(70)

^[1]

(177)

^[1]

(205)

^[1]

Regulatory Assets, Long Term [Member]

Derivatives, Fair Value [Line Items]

Deferred gain/(loss), asset

^[1]

(19)

^[1]

Derivative Asset [Member]

Derivatives, Fair Value [Line Items]

Total deferred losses

(127)

^[1]

(351)

^[1]

Derivative Liability [Member]

Derivatives, Fair Value [Line Items]

Total deferred losses

$ (3)

^[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, 2011 Con Edison recorded in non-utility operating revenues and purchased power expense an unrealized pre-tax (loss) of $(10) million and $(1) million, respectively.
[3]	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.
[4]	For the nine months ended September 30, 2011, Con Edison recorded in non-utility operating revenues and purchased power expense an unrealized pre-tax (loss)/gain of $(35) million and $59 million, respectively.
[5]	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.

- Definition

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

+ References+ Details

Derivative Instruments And Hedging Activities (Number Of Derivative Contracts By Commodity Type) (Details)

9 Months Ended

Sep. 30, 2011

Derivatives, Fair Value [Line Items]

Number of Energy Contracts

1,565

^[1]

Description Of Derivative Activity Volume Electric Derivatives [Member]

Derivatives, Fair Value [Line Items]

Number of Energy Contracts

810

^[1]

MWhs

16,479,730

^[2]

Number of Capacity Contracts

^[1]

MWs

8,201

^[2],[3]

Description Of Derivative Activity Volume Gas Derivatives [Member]

Derivatives, Fair Value [Line Items]

Number of Energy Contracts

682

^[1]

Dths

98,382,500

^[2],[3]

[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.
[3]	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, 2011

Derivatives, Fair Value [Line Items]

Aggregate fair value - net liabilities

$ 128

^[1]

Collateral posted

^[1],[2]

Additional Collateral Required Due To Loss Of Unsecured Credit [Member]

Derivatives, Fair Value [Line Items]

Collateral posted

146

Additional Collateral Aggregate Fair Value Down One Level [Member]

Derivatives, Fair Value [Line Items]

Additional collateral

^[1],[3],[4]

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

Derivatives, Fair Value [Line Items]

Collateral posted

Additional collateral

$ 143

^{[1],[3],[4],[5]}

[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, 2011, would have amounted to an estimated $146 million for Con Edison. 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]	Across the Utilities' energy derivative positions, credit limits for the same counterparties are generally integrated. At September 30, 2011, the Utilities posted combined collateral of $34 million, including an estimated $5 million attributable to O&R.
[3]	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.
[4]	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.
[5]	Derivative instruments that are net assets have been excluded from the table. At September 30, 2011, if Con Edison had been downgraded to below investment grade, it would have been required to post additional collateral for such derivative instruments of an estimated $16 million.

Fair Value Measurements (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Fair Value Measurements [Abstract]
Gain (loss) on Level 3 energy derivative assets	$ 1		$ (1)	$ 47
Gains (loss) on Level 3 energy derivative liabilities		14
Loss on Level 3 energy derivative assets for purchased power costs	(13)		26
Gain (loss) on Level 3 energy derivative liabilities for purchased power costs		(33)		(73)
Fair value, assets measured on recurring basis, change in unrealized gain (loss) included in other income	(10)	(3)	(35)	(2)
Fair value, assets measured on recurring basis, change in unrealized gain (loss) included in purchased power costs	$ (5)	$ (22)	$ 31	$ (29)

Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

9 Months Ended

Dec. 31, 2010

Sep. 30, 2011

Dec. 31, 2010

Fair Value, Inputs, Level 1 [Member]

Sep. 30, 2011

Fair Value, Inputs, Level 1 [Member]

Dec. 31, 2010

Fair Value, Inputs, Level 2 [Member]

Sep. 30, 2011

Fair Value, Inputs, Level 2 [Member]

Dec. 31, 2010

Fair Value, Inputs, Level 3 [Member]

Sep. 30, 2011

Fair Value, Inputs, Level 3 [Member]

Dec. 31, 2010

Netting Adjustments [Member]

Sep. 30, 2011

Netting Adjustments [Member]

Sep. 30, 2011

Commodity [Member]

Dec. 31, 2010

Commodity [Member]

Sep. 30, 2011

Commodity [Member]

Fair Value, Inputs, Level 1 [Member]

Dec. 31, 2010

Commodity [Member]

Fair Value, Inputs, Level 1 [Member]

Sep. 30, 2011

Commodity [Member]

Fair Value, Inputs, Level 2 [Member]

Dec. 31, 2010

Commodity [Member]

Fair Value, Inputs, Level 2 [Member]

Sep. 30, 2011

Commodity [Member]

Fair Value, Inputs, Level 3 [Member]

Dec. 31, 2010

Commodity [Member]

Fair Value, Inputs, Level 3 [Member]

Sep. 30, 2011

Commodity [Member]

Netting Adjustments [Member]

Dec. 31, 2010

Commodity [Member]

Netting Adjustments [Member]

Sep. 30, 2011

Fair Value Interest Rate Contract [Member]

Dec. 31, 2010

Fair Value Interest Rate Contract [Member]

Sep. 30, 2011

Fair Value Interest Rate Contract [Member]

Fair Value, Inputs, Level 1 [Member]

Dec. 31, 2010

Fair Value Interest Rate Contract [Member]

Fair Value, Inputs, Level 1 [Member]

Sep. 30, 2011

Fair Value Interest Rate Contract [Member]

Fair Value, Inputs, Level 2 [Member]

Dec. 31, 2010

Fair Value Interest Rate Contract [Member]

Fair Value, Inputs, Level 2 [Member]

Sep. 30, 2011

Fair Value Interest Rate Contract [Member]

Fair Value, Inputs, Level 3 [Member]

Dec. 31, 2010

Fair Value Interest Rate Contract [Member]

Fair Value, Inputs, Level 3 [Member]

Sep. 30, 2011

Fair Value Interest Rate Contract [Member]

Netting Adjustments [Member]

Dec. 31, 2010

Fair Value Interest Rate Contract [Member]

Netting Adjustments [Member]

Sep. 30, 2011