Financial Instruments (Tables)

6 Months Ended

Jul. 01, 2012

Financial Instruments (Thousands of Dollars) [Abstract]

Schedule of long-term debt instruments

	July 1, 2012		June 26, 2011		Dec. 25, 2011
	--------------------		--------------------		----------------------------
	Carrying Cost	Fair Value	Carrying Cost	Fair Value	Carrying Cost	Fair Value
	-------	------	-------	------	-------	------
6.35% Notes Due 2040	$  500,000	582,250	500,000	523,650	500,000	540,850
6.125% Notes Due 2014	439,662	460,020	443,136	469,625	440,977	462,868
6.30% Notes Due 2017	350,000	400,015	350,000	399,420	350,000	400,400
6.60% Debentures    Due 2028	109,895	123,038	109,895	115,675	109,895	120,148
	-------------	-------------	-------------	-----------	-------------	-----------
Total long-term debt	$1,399,557	1,565,323	1,403,031	1,508,370	1,400,872	1,524,266
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