Capitalization (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Schedule of Long-Term Debt Maturities

Long-term debt maturing in the period 2018-2022 is as follows:

(Millions of Dollars)	Con Edison	CECONY
2018	$1,298	$1,200
2019	578	475
2020	791	350
2021	544	—
2022	335	—

Carrying Amounts and Fair Values of Long-Term Debt

The carrying amounts and fair values of long-term debt at December 31, 2017 and 2016 are:

(Millions of Dollars)	2017		2016
Long-Term Debt (including current portion) (a)	Carrying Amount	Fair Value	Carrying Amount	Fair Value
Con Edison	$16,029	$18,147	$14,774	$16,093
CECONY	$13,265	$15,163	$12,073	$13,268

(a) Amounts shown are net of unamortized debt expense and unamortized debt discount of $142 million and $121 million for Con Edison and CECONY, respectively, as of December 31, 2017 and $134 million and $113 million for Con Edison and CECONY, respectively, as of December 31, 2016.