Long-Term Debt

Long-Term Debt at December 31, 2017 and 2016 consisted of the following (in thousands):



	2017		2016

5.875% Senior Notes due 2017	$	—	$	600,000
6.875% Senior Notes due 2018	350,000		350,000
5.625% Senior Notes due 2019	900,000		900,000
4.40% Senior Notes due 2020	500,000		500,000
2.45% Senior Notes due 2020	500,000		500,000
4.100% Senior Notes due 2021	750,000		750,000
2.625% Senior Notes due 2023	1,250,000		1,250,000
3.15% Senior Notes due 2025	500,000		500,000
4.15% Senior Notes due 2026	750,000		750,000
6.65% Senior Notes due 2028	140,000		140,000
3.90% Senior Notes due 2035	500,000		500,000
5.10% Senior Notes due 2036	250,000		250,000
Long-Term Debt	6,390,000		6,990,000
Capital Lease Obligation	32,155		38,710
Less: Current Portion of Long-Term Debt	356,235		6,579
Unamortized Debt Discount	30,564		36,915
Debt Issuance Costs	4,520		5,437
Total Long-Term Debt	$	6,030,836	$	6,979,779

At December 31, 2017, the aggregate annual maturities of long-term debt (excluding capital lease obligations) were $350 million in 2018, $900 million in 2019, $1 billion in 2020, $750 million in 2021 and zero in 2022. At December 31, 2017 and 2016, EOG had no outstanding short-term borrowings under the commercial paper program and no outstanding borrowings under uncommitted credit facilities.

During 2017 and 2016, EOG utilized commercial paper bearing market interest rates, for various corporate financing purposes. EOG had no outstanding commercial paper borrowings at December 31, 2017. The average borrowings outstanding under the commercial paper program were $84 million and $130 million during the years ended December 31, 2017 and 2016, respectively. The weighted average interest rates for commercial paper borrowings were 1.44% and 0.76% for the years 2017 and 2016, respectively.

On September 15, 2017, EOG repaid upon maturity the $600 million aggregate principal amount of its 5.875% Senior Notes due 2017.

On February 1, 2016, EOG repaid upon maturity the $400 million aggregate principal amount of its 2.500% Senior Notes due 2016.

On January 14, 2016, EOG closed its sale of $750 million aggregate principal amount of its 4.15% Senior Notes due 2026 and $250 million aggregate principal amount of its 5.10% Senior Notes due 2036 (collectively, the Notes). Interest on the Notes is payable semi-annually in arrears on January 15 and July 15 of each year, beginning on July 15, 2016. Net proceeds from the Notes offering totaled approximately $991 million and were used to repay EOG's 2.500% Senior Notes due 2016 and for general corporate purposes, including repayment of outstanding commercial paper borrowings and funding of future capital expenditures.

EOG currently has a $2.0 billion senior unsecured Revolving Credit Agreement (Agreement) with domestic and foreign lenders. The Agreement has a scheduled maturity date of July 21, 2020, and includes an option for EOG to extend, on up to two occasions, the term for successive one-year periods subject to certain terms and conditions. Advances under the Agreement will accrue interest based, at EOG's option, on either the London InterBank Offered Rate plus an applicable margin (Eurodollar rate) or the base rate (as defined in the Agreement) plus an applicable margin. The Agreement contains representations, warranties, covenants and events of default that are customary for investment-grade, senior unsecured commercial bank credit agreements, including a financial covenant for the maintenance of a debt-to-total capitalization ratio of no greater than 65%. At December 31, 2017, EOG was in compliance with this financial covenant. At December 31, 2017, there were no borrowings or letters of credit outstanding under the Agreement. The Eurodollar rate and applicable base rate, had there been any amounts borrowed under the Agreement, would have been 2.56% and 4.50%, respectively.