Consolidated Income Statement (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
OPERATING REVENUES
Electric	$ 9,114	$ 8,756	$ 8,765
Gas	1,933	1,821	1,618
Steam	628	683	596
Non-utility	1,244	1,094	1,209
TOTAL OPERATING REVENUES	12,919	12,354	12,188
OPERATING EXPENSES
Purchased power	3,417	3,099	3,116
Fuel	285	320	310
Gas purchased for resale	811	635	461
Other operations and maintenance	3,294	3,137	3,182
Depreciation and amortization	1,071	1,024	955
Taxes, other than income taxes	1,877	1,895	1,825
TOTAL OPERATING EXPENSES	10,755	10,110	9,849
Gain on sale of solar electric production projects	45
OPERATING INCOME	2,209	2,244	2,339
OTHER INCOME (DEDUCTIONS)
Investment and other income	54	24	18
Allowance for equity funds used during construction	2	4	4
Other deductions	(14)	(15)	(16)
TOTAL OTHER INCOME (DEDUCTIONS)	42	13	6
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	2,251	2,257	2,345
INTEREST EXPENSE
Interest on long-term debt	587	578	586
Other interest	5	143	20
Allowance for borrowed funds used during construction	(1)	(2)	(2)
NET INTEREST EXPENSE	591	719	604
INCOME BEFORE INCOME TAX EXPENSE	1,660	1,538	1,741
INCOME TAX EXPENSE	568	476	600
NET INCOME	1,092	1,062	1,141
Preferred stock dividend requirements			(3)
NET INCOME FOR COMMON STOCK	1,092	1,062	1,138
Net income for common stock per common share - basic	$ 3.73	$ 3.62	$ 3.88
Net income for common stock per common share - diluted	$ 3.71	$ 3.61	$ 3.86
DIVIDENDS DECLARED PER SHARE OF COMMON STOCK	$ 2.52	$ 2.46	$ 2.42
AVERAGE NUMBER OF SHARES OUTSTANDING - BASIC (IN MILLIONS)	292.9	292.9	292.9
AVERAGE NUMBER OF SHARES OUTSTANDING - DILUTED (IN MILLIONS)	294.0	294.4	294.5
CECONY [Member]
OPERATING REVENUES
Electric	8,437	8,131	8,176
Gas	1,721	1,616	1,415
Steam	628	683	596
TOTAL OPERATING REVENUES	10,786	10,430	10,187
OPERATING EXPENSES
Purchased power	2,091	2,021	1,968
Fuel	285	320	310
Gas purchased for resale	609	532	387
Other operations and maintenance	2,873	2,735	2,788
Depreciation and amortization	991	946	894
Taxes, other than income taxes	1,798	1,816	1,747
TOTAL OPERATING EXPENSES	8,647	8,370	8,094
OPERATING INCOME	2,139	2,060	2,093
OTHER INCOME (DEDUCTIONS)
Investment and other income	22	11	9
Allowance for equity funds used during construction	1	2	2
Other deductions	(12)	(12)	(13)
TOTAL OTHER INCOME (DEDUCTIONS)	11	1	(2)
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	2,150	2,061	2,091
INTEREST EXPENSE
Interest on long-term debt	523	511	525
Other interest	15	11	22
Allowance for borrowed funds used during construction	(1)	(1)	(2)
NET INTEREST EXPENSE	537	521	545
INCOME BEFORE INCOME TAX EXPENSE	1,613	1,540	1,546
INCOME TAX EXPENSE	555	520	529
NET INCOME	1,058	1,020	1,017
Preferred stock dividend requirements			(3)
NET INCOME FOR COMMON STOCK	$ 1,058	$ 1,020	$ 1,014