Debt

9 Months Ended

Sep. 30, 2019

Total debt at September 30, 2019 and December 31, 2018 consisted of the following:



	Interest rate	September 30, 2019		December 31, 2018
Notes due September 2020	4.125%	$	300,000	$	300,000
Notes due October 2021	3.875%	600,000		600,000
Notes due May 2022	4.625%	400,000		400,000
Notes due April 2023	4.95%	400,000		400,000
Notes due March 2024	4.625%	500,000		500,000
Notes due January 2037	5.25%	35,841		35,841
Notes due March 2043	6.7%	425,000		425,000
Term loans	Variable	427,500		630,000
Other debt		5,158		5,297
Principal amount		3,093,499		3,296,138
Less: unamortized costs, net		24,408		30,530
Total debt		3,069,091		3,265,608
Less: current portion long-term debt		501,728		199,535
Long-term debt		$	2,567,363	$	3,066,073

Interest rates on certain notes are subject to adjustment based on changes in our credit ratings. In April 2019, Moody's lowered our corporate credit rating from Ba1 to Ba2. As a result, the interest rates on the May 2022 notes and September 2020 notes increased 0.25% since December 31, 2018, and the interest rates on the October 2021 notes and April 2023 increased 0.25% on October 1, 2019.

During 2019, we repaid $38 million of principal related to our term loans. In September 2019, we repaid the remaining $165 million of our $200 million term loan and recorded a loss of $1 million on the early redemption of debt.

In November 2019, we repaid the $150 million term loan due November 2019 and the remaining balance of the $300 million term loan due December 2020, secured a new five-year $400 million term loan and replaced our revolving credit facility scheduled to mature in January 2021 for $500 million.