Financial Instruments (Tables)

3 Months Ended

Apr. 01, 2018

Financial Instruments (Thousands of Dollars) [Abstract]

Schedule of Long-term Debt Instruments

	April 1, 2018				April 2, 2017				December 31, 2017
	Carrying		Fair		Carrying		Fair		Carrying		Fair
	Cost		Value		Cost		Value		Cost		Value
6.35% Notes Due 2040	$	500,000		585,400		500,000		597,150		500,000		601,800
3.50% Notes Due 2027		500,000		468,000		-		-		500,000		488,300
6.30% Notes Due 2017		-		-		350,000		357,385		-		-
5.10% Notes Due 2044		300,000		299,460		300,000		306,570		300,000		313,320
3.15% Notes Due 2021		300,000		300,480		300,000		305,490		300,000		302,640
6.60% Debentures Due 2028		109,895		128,006		109,895		125,390		109,895		131,390
Total long-term debt	$	1,709,895		1,781,346		1,559,895		1,691,985		1,709,895		1,837,450
Less: Current portion		-		-		350,000		357,385		-		-
Less: Deferred debt expenses		15,918		-		10,999		-		16,286		-
Long-term debt	$	1,693,977		1,781,346		1,198,896		1,334,600		1,693,609		1,837,450