Consolidated Income Statement (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
OPERATING REVENUES
Electric	$ 2,810	$ 2,861	$ 6,762	$ 6,883
Gas	216	220	1,161	1,309
Steam	68	76	414	508
Non-utility	344	472	950	1,272
TOTAL OPERATING REVENUES	3,438	3,629	9,287	9,972
OPERATING EXPENSES
Purchased power	930	1,239	2,440	3,124
Fuel	59	73	213	317
Gas purchased for resale	56	73	314	491
Operations and maintenance	826	783	2,365	2,213
Depreciation and amortization	240	222	709	659
Taxes, other than income taxes	476	483	1,360	1,387
TOTAL OPERATING EXPENSES	2,587	2,873	7,401	8,191
OPERATING INCOME	851	756	1,886	1,781
OTHER INCOME (DEDUCTIONS)
Investment and other income	4		14	19
Allowance for equity funds used during construction	1	2	3	8
Other deductions	(3)	(3)	(13)	(14)
TOTAL OTHER INCOME (DEDUCTIONS)	2	(1)	4	13
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	853	755	1,890	1,794
INTEREST EXPENSE
Interest on long-term debt	146	145	440	437
Other interest	6		17	15
Allowance for borrowed funds used during construction		(1)	(2)	(4)
NET INTEREST EXPENSE	152	144	455	448
INCOME BEFORE INCOME TAX EXPENSE	701	611	1,435	1,346
INCOME TAX EXPENSE	261	225	501	477
NET INCOME	440	386	934	869
Preferred stock dividend requirements of subsidiary		(3)	(3)	(9)
NET INCOME FOR COMMON STOCK	440	383	931	860
Net income for common stock per common share-basic	$ 1.50	$ 1.31	$ 3.18	$ 2.94
Net income for common stock per common share-diluted	$ 1.49	$ 1.30	$ 3.16	$ 2.92
DIVIDENDS DECLARED PER SHARE OF COMMON STOCK	$ 0.605	$ 0.600	$ 1.815	$ 1.800
AVERAGE NUMBER OF SHARES OUTSTANDING-BASIC (IN MILLIONS)	292.9	292.9	292.9	292.5
AVERAGE NUMBER OF SHARES OUTSTANDING-DILUTED (IN MILLIONS)	294.6	294.6	294.6	294.2
CECONY [Member]
OPERATING REVENUES
Electric	2,611	2,644	6,307	6,378
Gas	189	197	1,017	1,156
Steam	68	76	414	508
TOTAL OPERATING REVENUES	2,868	2,917	7,738	8,042
OPERATING EXPENSES
Purchased power	604	736	1,554	1,840
Fuel	59	73	213	317
Gas purchased for resale	45	57	264	412
Other operations and maintenance	725	678	2,065	1,906
Depreciation and amortization	225	209	664	618
Taxes, other than income taxes	456	462	1,300	1,330
TOTAL OPERATING EXPENSES	2,114	2,215	6,060	6,423
OPERATING INCOME	754	702	1,678	1,619
OTHER INCOME (DEDUCTIONS)
Investment and other income	2	(6)	6	3
Allowance for equity funds used during construction		1	2	6
Other deductions	(2)	(3)	(10)	(12)
TOTAL OTHER INCOME (DEDUCTIONS)		(8)	(2)	(3)
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	754	694	1,676	1,616
INTEREST EXPENSE
Interest on long-term debt	130	130	395	393
Other interest	8	4	19	13
Allowance for borrowed funds used during construction		(1)	(1)	(3)
NET INTEREST EXPENSE	138	133	413	403
INCOME BEFORE INCOME TAX EXPENSE	616	561	1,263	1,213
INCOME TAX EXPENSE	227	205	436	425
NET INCOME	389	356	827	788
Preferred stock dividend requirements of subsidiary		(3)	(3)	(9)
NET INCOME FOR COMMON STOCK	$ 389	$ 353	$ 824	$ 779