(In millions)	2014		2013
Short-term:
Commercial paper	$	100	$	100
Other, including capital leases		47		133
Total short-term debt	$	147	$	233
Long-term:
Uncollateralized debt:
$600 million, 2.75% Notes due 2016	$	600	$	600
$250 million, 5.375% Notes due 2017		250		250
$131 million, 6.35% Notes due 2018		131		131
$251 million, 8.5% Notes due 2019		251		251
$250 million, 4.375% Notes due 2020 ⁽¹⁾		254		249
$300 million, 5.125% Notes due 2020 ⁽¹⁾		303		299
$78 million, 6.37% Notes due 2021		78		78
$300 million, 4.5% Notes due 2021⁽¹⁾		303		299
$750 million, 4% Notes due 2022		745		744
$100 million, 7.65% Notes due 2023		100		100
$17 million, 8.3% Notes due 2023		17		17
$300 million, 7.875% Debentures due 2027		300		300
$83 million, 8.3% Step Down Notes due 2033		83		83
$500 million, 6.15% Notes due 2036		500		500
$300 million, 5.875% Notes due 2041		298		298
$750 million, 5.375% Notes due 2042		750		750
Other, including capital leases		42		65
Total long-term debt	$	5,005	$	5,014

(1) In 2014, the Company entered into interest rate swap contracts hedging a portion of these fixed-rate debt instruments. See Note 12 for further information about the Company’s interest rate risk management and these derivative instruments.

In December 2014, the Company entered into an updated revolving credit and letter of credit agreement for $1.5 billion, that permits up to $500 million to be used for letters of credit. This agreement extends through December 2019 and is diversified among 16 banks, with three banks each having 12% of the commitment and the remainder spread among 13 banks. The credit agreement includes options, subject to consent by the administrative agent and the committing banks, to increase the commitment amount to $2 billion and to extend the term past December 2019. The credit agreement is available for general corporate purposes, including for the issuance of letters of credit. This agreement has certain covenants, including a financial covenant requiring the Company to maintain a leverage ratio of total consolidated debt-to-consolidated capitalization (each as defined in the credit agreement) at or below 0.50. As of December 31, 2014, the Company had $6.5 billion of borrowing capacity within the maximum debt coverage covenant in the agreement, in addition to the $5.2 billion of debt outstanding. Letters of credit outstanding as of December 31, 2014 totaled $23 million. The Company was in compliance with its debt covenants as of December 31, 2014.

Maturities of long-term debt, excluding capital leases, are as follows (in millions): $25 in 2015, $600 in 2016, $250 in 2017, $131 in 2018, $251 in 2019 and the remainder in years after 2019. Maturities of debt under capital lease arrangements are as follows (in millions): $22 in 2015, $22 in 2016, $11 in 2017, $4 in 2018, none in 2019 and the remainder in years after 2019. Interest expense on long-term and short-term debt was $265 million in 2014, $270 million in 2013, and $268 million in 2012.