Financial Instruments (Tables)

3 Months Ended

Apr. 01, 2012

Financial Instruments (Thousands of Dollars) [Abstract]

Schedule of long-term debt instruments

	April 1, 2012		March 27, 2011		Dec. 25, 2011
	--------------------		--------------------		----------------------------
	Carrying Cost	Fair Value	Carrying Cost	Fair Value	Carrying Cost	Fair Value
	-------	------	-------	------	-------	------
6.35% Notes Due 2040	$   500,000	535,950	500,000	498,800	500,000	540,850
6.125% Notes Due 2014	441,047	461,678	436,800	465,545	440,977	462,868
6.30% Notes Due 2017	350,000	400,260	350,000	386,295	350,000	400,400
6.60% Debentures    Due 2028	109,895	118,148	109,895	113,115	109,895	120,148
	-------------	-----------	-------------	-----------	-------------	-----------
Total long-term debt	$1,400,942	1,516,036	1,396,695	1,463,755	1,400,872	1,524,266
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