Capitalization (Tables)

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Carrying Amounts and Fair Values of Long-Term Debt

The carrying amounts and fair values of long-term debt at March 31, 2018 and December 31, 2017 were:

(Millions of Dollars)	2018		2017
Long-Term Debt (including current portion) (a)	Carrying Amount	Fair Value	Carrying Amount	Fair Value
Con Edison	$16,021	$17,388	$16,029	$18,147
CECONY	$13,266	$14,500	$13,265	$15,163

(a) Amounts shown are net of unamortized debt expense and unamortized debt discount of $140 million and $120 million for Con Edison and CECONY, respectively, as of March 31, 2018 and $142 million and $121 million for Con Edison and CECONY, respectively, as of December 31, 2017.