Consolidated Income Statement (USD $) In Millions, except Per Share data	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