CONSOLIDATED INCOME STATEMENT (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
OPERATING REVENUES
Electric	$ 2,018	$ 2,090	$ 3,977	$ 3,952
Gas	366	300	1,108	945
Steam	118	83	450	346
Non-utility	316	298	468	606
TOTAL OPERATING REVENUES	2,818	2,771	6,003	5,849
OPERATING EXPENSES
Purchased power	768	729	1,475	1,510
Fuel	58	46	205	153
Gas purchased for resale	118	62	368	258
Other operations and maintenance	776	790	1,606	1,539
Depreciation and amortization	255	236	506	469
Taxes, other than income taxes	457	433	931	884
TOTAL OPERATING EXPENSES	2,432	2,296	5,091	4,813
OPERATING INCOME	386	475	912	1,036
OTHER INCOME (DEDUCTIONS)
Investment and other income	7	2	10	10
Allowance for equity funds used during construction	1	2	1	2
Other deductions	(6)	(6)	(8)	(10)
TOTAL OTHER INCOME (DEDUCTIONS)	2	(2)	3	2
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	388	473	915	1,038
INTEREST EXPENSE
Interest on long-term debt	145	149	288	295
Other interest	6	5	142	10
Allowance for borrowed funds used during construction		(1)	(1)	(1)
NET INTEREST EXPENSE	151	153	429	304
INCOME BEFORE INCOME TAX EXPENSE	237	320	486	734
INCOME TAX EXPENSE	65	106	122	240
NET INCOME	172	214	364	494
Preferred stock dividend requirements of subsidiary				(3)
Cumulative preferred dividends				(3)
NET INCOME FOR COMMON STOCK	172	214	364	491
Net income for common stock per common share-basic	$ 0.59	$ 0.73	$ 1.24	$ 1.68
Net income for common stock per common share-diluted	$ 0.59	$ 0.73	$ 1.24	$ 1.67
DIVIDENDS DECLARED PER SHARE OF COMMON STOCK	$ 0.615	$ 0.605	$ 1.230	$ 1.210
AVERAGE NUMBER OF SHARES OUTSTANDING-BASIC (IN MILLIONS)	292.9	292.9	292.9	292.9
AVERAGE NUMBER OF SHARES OUTSTANDING-DILUTED (IN MILLIONS)	294.3	294.4	294.3	294.4
CECONY [Member]
OPERATING REVENUES
Electric	1,872	1,961	3,686	3,696
Gas	331	265	991	828
Steam	118	83	450	346
TOTAL OPERATING REVENUES	2,321	2,309	5,127	4,870
OPERATING EXPENSES
Purchased power	469	504	924	950
Fuel	58	46	205	154
Gas purchased for resale	98	50	317	219
Other operations and maintenance	676	693	1,417	1,339
Depreciation and amortization	235	221	468	439
Taxes, other than income taxes	439	415	890	844
TOTAL OPERATING EXPENSES	1,975	1,929	4,221	3,945
OPERATING INCOME	346	380	906	925
OTHER INCOME (DEDUCTIONS)
Investment and other income	3	1	5	5
Allowance for equity funds used during construction		1	1	1
Other deductions	(5)	(5)	(7)	(8)
TOTAL OTHER INCOME (DEDUCTIONS)	(2)	(3)	(1)	(2)
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	344	377	905	923
INTEREST EXPENSE
Interest on long-term debt	129	135	256	266
Other interest	5	5	11	10
Allowance for borrowed funds used during construction		(1)	(1)	(1)
NET INTEREST EXPENSE	134	139	266	275
INCOME BEFORE INCOME TAX EXPENSE	210	238	639	648
INCOME TAX EXPENSE	57	75	209	209
NET INCOME	153	163	430	439
Cumulative preferred dividends				(3)
NET INCOME FOR COMMON STOCK	$ 153	$ 163	$ 430	$ 436