Consolidated Income Statement (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
OPERATING REVENUES
Electric	$ 8,756	$ 8,765	$ 8,866
Gas	1,821	1,618	1,735
Steam	683	596	683
Non-utility	1,094	1,209	1,602
TOTAL OPERATING REVENUES	12,354	12,188	12,886
OPERATING EXPENSES
Purchased power	3,099	3,116	3,967
Fuel	320	310	412
Gas purchased for resale	635	461	622
Other operations and maintenance	3,137	3,182	2,969
Depreciation and amortization	1,024	955	884
Taxes, other than income taxes	1,895	1,825	1,793
TOTAL OPERATING EXPENSES	10,110	9,849	10,647
OPERATING INCOME	2,244	2,339	2,239
OTHER INCOME (DEDUCTIONS)
Investment and other income	24	18	23
Allowance for equity funds used during construction	4	4	11
Other deductions	(15)	(16)	(17)
TOTAL OTHER INCOME	13	6	17
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	2,257	2,345	2,256
INTEREST EXPENSE
Interest on long-term debt	578	586	582
Other interest	143	20	18
Allowance for borrowed funds used during construction	(2)	(2)	(6)
NET INTEREST EXPENSE	719	604	594
INCOME BEFORE INCOME TAX EXPENSE	1,538	1,741	1,662
INCOME TAX EXPENSE	476	600	600
NET INCOME	1,062	1,141	1,062
Preferred stock dividend requirements		(3)	(11)
NET INCOME FOR COMMON STOCK	1,062	1,138	1,051
Net income for common stock per common share - basic	$ 3.62	$ 3.88	$ 3.59
Net income for common stock per common share - diluted	$ 3.61	$ 3.86	$ 3.57
DIVIDENDS DECLARED PER SHARE OF COMMON STOCK	$ 2.46	$ 2.42	$ 2.40
AVERAGE NUMBER OF SHARES OUTSTANDING - BASIC (IN MILLIONS)	292.9	292.9	292.6
AVERAGE NUMBER OF SHARES OUTSTANDING - DILUTED (IN MILLIONS)	294.4	294.5	294.4
CECONY [Member]
OPERATING REVENUES
Electric	8,131	8,176	8,228
Gas	1,616	1,415	1,521
Steam	683	596	683
TOTAL OPERATING REVENUES	10,430	10,187	10,432
OPERATING EXPENSES
Purchased power	2,021	1,968	2,313
Fuel	320	310	412
Gas purchased for resale	532	387	518
Other operations and maintenance	2,735	2,788	2,561
Depreciation and amortization	946	894	829
Taxes, other than income taxes	1,816	1,747	1,716
TOTAL OPERATING EXPENSES	8,370	8,094	8,349
OPERATING INCOME	2,060	2,093	2,083
OTHER INCOME (DEDUCTIONS)
Investment and other income	11	9	4
Allowance for equity funds used during construction	2	2	8
Other deductions	(12)	(13)	(14)
TOTAL OTHER INCOME	1	(2)	(2)
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	2,061	2,091	2,081
INTEREST EXPENSE
Interest on long-term debt	511	525	523
Other interest	11	22	16
Allowance for borrowed funds used during construction	(1)	(2)	(5)
NET INTEREST EXPENSE	521	545	534
INCOME BEFORE INCOME TAX EXPENSE	1,540	1,546	1,547
INCOME TAX EXPENSE	520	529	558
NET INCOME	1,020	1,017	989
Preferred stock dividend requirements		(3)	(11)
NET INCOME FOR COMMON STOCK	$ 1,020	$ 1,014	$ 978