Consolidated Income Statement (USD $) In Millions, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
OPERATING REVENUES
Electric	$ 2,153	$ 2,256	$ 4,022	$ 4,145
Gas	333	274	1,088	1,047
Steam	107	89	432	396
Non-utility	400	398	800	890
TOTAL OPERATING REVENUES	2,993	3,017	6,342	6,478
OPERATING EXPENSES
Purchased power	1,020	1,140	1,886	2,283
Fuel	68	87	244	237
Gas purchased for resale	111	67	418	410
Other operations and maintenance	732	678	1,429	1,379
Depreciation and amortization	219	211	437	415
Taxes, other than income taxes	445	405	904	833
TOTAL OPERATING EXPENSES	2,595	2,588	5,318	5,557
OPERATING INCOME	398	429	1,024	921
OTHER INCOME (DEDUCTIONS)
Investment and other income	10	14	19	21
Allowance for equity funds used during construction	2	4	6	9
Other deductions	(7)	(6)	(10)	(9)
TOTAL OTHER INCOME (DEDUCTIONS)	5	12	15	21
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	403	441	1,039	942
INTEREST EXPENSE
Interest on long-term debt	146	148	293	298
Other interest	7	4	14	6
Allowance for borrowed funds used during construction	(1)	(3)	(3)	(5)
NET INTEREST EXPENSE	152	149	304	299
INCOME BEFORE INCOME TAX EXPENSE	251	292	735	643
INCOME TAX EXPENSE	83	106	252	228
NET INCOME	168	186	483	415
Preferred stock dividend requirements of subsidiary	(3)	(3)	(6)	(6)
NET INCOME FOR COMMON STOCK	165	183	477	409
Net income for common stock per common share - basic	$ 0.57	$ 0.65	$ 1.63	$ 1.45
Net income for common stock per common share - diluted	$ 0.56	$ 0.64	$ 1.62	$ 1.44
DIVIDENDS DECLARED PER SHARE OF COMMON STOCK	$ 0.600	$ 0.595	$ 1.200	$ 1.190
AVERAGE NUMBER OF SHARES OUTSTANDING - BASIC (IN MILLIONS)	292.7	282.0	292.3	281.7
AVERAGE NUMBER OF SHARES OUTSTANDING - DILUTED (IN MILLIONS)	294.3	283.5	293.9	283.2
CECONY [Member]
OPERATING REVENUES
Electric	2,013	2,104	3,734	3,832
Gas	296	239	959	922
Steam	107	89	432	396
TOTAL OPERATING REVENUES	2,416	2,432	5,125	5,150
OPERATING EXPENSES
Purchased power	621	787	1,104	1,339
Fuel	68	87	244	237
Gas purchased for resale	92	51	355	345
Other operations and maintenance	631	588	1,227	1,195
Depreciation and amortization	205	196	410	388
Taxes, other than income taxes	429	389	868	800
TOTAL OPERATING EXPENSES	2,046	2,098	4,208	4,304
OPERATING INCOME	370	334	917	846
OTHER INCOME (DEDUCTIONS)
Investment and other income	4	14	9	18
Allowance for equity funds used during construction	2	4	5	8
Other deductions	(6)	(6)	(9)	(9)
TOTAL OTHER INCOME (DEDUCTIONS)		12	5	17
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	370	346	922	863
INTEREST EXPENSE
Interest on long-term debt	131	133	263	268
Other interest	5	5	10	8
Allowance for borrowed funds used during construction	(1)	(2)	(3)	(4)
NET INTEREST EXPENSE	135	136	270	272
INCOME BEFORE INCOME TAX EXPENSE	235	210	652	591
INCOME TAX EXPENSE	75	72	220	207
NET INCOME	160	138	432	384
Preferred stock dividend requirements of subsidiary	(3)	(3)	(6)	(6)
NET INCOME FOR COMMON STOCK	$ 157	$ 135	$ 426	$ 378