Consolidated Income Statement - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
OPERATING REVENUES
Electric	$ 8,612	$ 8,741	$ 8,832
Gas	2,133	1,692	1,709
Steam	595	551	629
Non-utility	693	1,091	1,384
TOTAL OPERATING REVENUES	12,033	12,075	12,554
OPERATING EXPENSES
Purchased power	1,601	2,439	2,973
Fuel	216	172	248
Gas purchased for resale	808	477	495
Other operations and maintenance	3,303	3,269	3,344
Depreciation and amortization	1,341	1,216	1,130
Taxes, other than income taxes	2,155	2,031	1,937
TOTAL OPERATING EXPENSES	9,424	9,604	10,127
Gain on sale of retail electric supply business and solar electric production projects	1	104	0
OPERATING INCOME	2,610	2,575	2,427
OTHER INCOME (DEDUCTIONS)
Investment income	79	47	0
Other income	47	44	35
Allowance for equity funds used during construction	11	10	5
Other deductions	(21)	(37)	(16)
TOTAL OTHER INCOME	116	64	24
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	2,726	2,639	2,451
INTEREST EXPENSE
Interest on long-term debt	726	678	632
Other interest	11	24	24
Allowance for borrowed funds used during construction	(8)	(6)	(3)
NET INTEREST EXPENSE	729	696	653
INCOME BEFORE INCOME TAX EXPENSE	1,997	1,943	1,798
INCOME TAX EXPENSE	472	698	605
NET INCOME	$ 1,525	$ 1,245	$ 1,193
Net income per common share — basic (dollars per share)	$ 4.97	$ 4.15	$ 4.07
Net income per common share — diluted (dollars per share)	4.94	4.12	4.05
DIVIDENDS DECLARED PER COMMON SHARE (dollars per share)	$ 2.76	$ 2.68	$ 2.60
AVERAGE NUMBER OF SHARES OUTSTANDING — BASIC	307.1	300.4	293.0
AVERAGE NUMBER OF SHARES OUTSTANDING — DILUTED	308.8	301.9	294.4
CECONY
OPERATING REVENUES
Electric	$ 7,972	$ 8,106	$ 8,172
Gas	1,901	1,508	1,527
Steam	595	551	629
TOTAL OPERATING REVENUES	10,468	10,165	10,328
OPERATING EXPENSES
Purchased power	1,415	1,568	1,719
Fuel	216	172	248
Gas purchased for resale	510	319	337
Other operations and maintenance	2,670	2,806	2,881
Depreciation and amortization	1,195	1,106	1,040
Taxes, other than income taxes	2,057	1,932	1,856
TOTAL OPERATING EXPENSES	8,063	7,903	8,081
OPERATING INCOME	2,405	2,262	2,247
OTHER INCOME (DEDUCTIONS)
Investment income	14	8	5
Allowance for equity funds used during construction	10	8	4
Other deductions	(17)	(16)	(14)
TOTAL OTHER INCOME	7	0	(5)
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	2,412	2,262	2,242
INTEREST EXPENSE
Interest on long-term debt	615	588	567
Other interest	14	19	19
Allowance for borrowed funds used during construction	(6)	(4)	(2)
NET INTEREST EXPENSE	623	603	584
INCOME BEFORE INCOME TAX EXPENSE	1,789	1,659	1,658
INCOME TAX EXPENSE	685	603	574
NET INCOME	$ 1,104	$ 1,056	$ 1,084