Capitalization

In April 2018, CECONY redeemed at maturity $600 million of 5.85 percent 10-year debentures. In May 2018, CECONY issued $300 million aggregate principal amount of 3.80 percent debentures, due 2028, and $700 million aggregate principal amount of 4.50 percent debentures, due 2058. In June 2018, CECONY issued $640 million of floating rate debentures, due 2021, and in July and August 2018, CECONY redeemed $636 million of its tax-exempt debt for which the interest rates were to be determined pursuant to periodic auctions. In August 2018, O&R issued $125 million aggregate principal amount of 4.35 percent debentures, due 2048, and agreed to issue an additional $25 million aggregate principal amount of debentures in December 2018. In September 2018, O&R redeemed at maturity $50 million of 6.15 percent 10-year debentures. In September 2018, a Con Edison Development subsidiary issued $140 million aggregate principal amount of 4.41 percent Senior Notes, due 2028, secured by five of the company's wind electric production projects.

The carrying amounts and fair values of long-term debt at September 30, 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	$16,608	$17,369	$16,029	$18,147
CECONY	$13,662	$14,333	$13,265	$15,163


(a)	Amounts shown are net of unamortized debt expense and unamortized debt discount of $149 million and $128 million for Con Edison and CECONY, respectively, as of September 30, 2018 and $142 million and $121 million for Con Edison and CECONY, respectively, as of December 31, 2017.

The fair values of the Companies' long-term debt have been estimated primarily using available market information and at September 30, 2018 are classified as Level 2 (see Note L).