Financial Instruments (Tables)

9 Months Ended

Oct. 01, 2017

Financial Instruments (Thousands of Dollars) [Abstract]

Schedule of Long-term Debt Instruments

	October 1, 2017				September 25, 2016				December 25, 2016
	Carrying		Fair		Carrying		Fair		Carrying		Fair
	Cost		Value		Cost		Value		Cost		Value
6.35% Notes Due 2040	$	500,000		613,750		500,000		611,200		500,000		584,850
3.50% Notes Due 2027		500,000		496,850		-		-		-		-
6.30% Notes Due 2017		-		-		350,000		366,205		350,000		361,900
5.10% Notes Due 2044		300,000		324,300		300,000		324,450		300,000		297,600
3.15% Notes Due 2021		300,000		306,840		300,000		310,620		300,000		300,450
6.60% Debentures Due 2028		109,895		132,830		109,895		132,786		109,895		123,984
Total long-term debt	$	1,709,895		1,874,570		1,559,895		1,745,261		1,559,895		1,668,784
Less: Current portion		-		-		350,000		366,205		350,000		361,900
Less: Deferred debt expenses		16,634		-		11,434		-		11,216		-
Long-term debt	$	1,693,261		1,874,570		1,198,461		1,379,056		1,198,679		1,306,884