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Debt (Tables)
12 Months Ended
Dec. 31, 2018
Debt Disclosure [Abstract]  
Debt Instruments
Debt at December 31 was as follows:
20182017
5.75% debentures due November 2040 $599,208 $599,171 
4.375% debentures due November 2021 249,116 248,803 
9.2% debentures due August 2021 4,315 4,294 
1.00% Euro loan due May 2021 169,976 177,218 
Term loan due July 2022158,949 246,328 
Commercial paper, average rate of 2.15% in 2018 and 1.24% in 2017 120,000 124,000 
Other foreign denominated debt, average rate of 3.7% in 2018 and 3.8% in 2017 57,867 21,735 
Other notes25,731 25,780 
Total debt1,385,162 1,447,329 
Less current portion and short-term notes195,445 159,327 
Long-term debt$1,189,717 $1,288,002