Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Debt Instruments

Debt at December 31 was as follows:

	2015		2014
5.75% debentures due November 2040	$	604,185	$	604,353
4.375% debentures due November 2021	249,334		249,220
9.2% debentures due August 2021	4,321		4,321
5.625% debentures due June 2016	75,250		75,201
Term loan, due October 2017	150,000		250,000
Commercial paper, average rate of 0.39% in 2015 and 0.22% in 2014	—		—
Foreign denominated debt, average rate of 4.3% in 2015 and 4.6% in 2014	39,070		56,763
Other notes	12,791		13,307
Total debt	1,134,951		1,253,165
Less current portion and short-term notes	113,097		52,280
Long-term debt	$	1,021,854	$	1,200,885