Financial Instruments (Tables)

9 Months Ended

Sep. 25, 2016

Financial Instruments (Thousands of Dollars) [Abstract]

Schedule of Long-term Debt Instruments

	September 25, 2016				September 27, 2015				December 27, 2015
	Carrying		Fair		Carrying		Fair		Carrying		Fair
	Cost		Value		Cost		Value		Cost		Value
6.35% Notes Due 2040	$	500,000		611,200		500,000		563,400		500,000		556,300
6.30% Notes Due 2017		350,000		366,205		350,000		379,925		350,000		374,045
5.10% Notes Due 2044		300,000		324,450		300,000		291,900		300,000		286,710
3.15% Notes Due 2021		300,000		310,620		300,000		303,990		300,000		300,060
6.60% Debentures Due 2028		109,895		132,786		109,895		123,225		109,895		121,269
Total long-term debt	$	1,559,895		1,745,261		1,559,895		1,662,440		1,559,895		1,638,384
Less: Current portion		350,000		366,205		-		-		-		-
Less: Deferred debt expenses		11,434		-		13,099		-		12,780		-
Long-term debt	$	1,198,461		1,379,056		1,546,796		1,662,440		1,547,115		1,638,384