Consolidated Statements of Shareholders' Equity (USD $) In Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Earnings [Member]	Treasury Stock [Member]	Total
Balance at Dec. 28, 2008	$ 104,847	$ 450,155	$ 2,456,650	$ 62,256	$ (1,683,122)	$ 1,390,786
Net earnings	0	0	374,930	0	0	374,930
Other comprehensive loss	0	0	0	(3,625)	0	(3,625)
Comprehensive earnings						371,305
Stock-based compensation transactions	0	(12,724)	0	0	17,518	4,794
Purchases of common stock	0	0	0	0	(90,994)	(90,994)
Stock-based compensation expense	0	29,752	0	0	160	29,912
Dividends declared	0	0	(111,031)	0	0	(111,031)
Balance at Dec. 27, 2009	104,847	467,183	2,720,549	58,631	(1,756,438)	1,594,772
Net earnings	0	0	397,752	0	0	397,752
Other comprehensive loss	0	0	0	(50,482)	0	(50,482)
Comprehensive earnings						347,270
Stock-based compensation transactions	0	22,971	0	0	86,253	109,224
Conversion of debentures	0	102,792	0	0	204,635	307,427
Purchases of common stock	0	0	0	0	(636,681)	(636,681)
Stock-based compensation expense	0	33,015	0	0	377	33,392
Dividends declared	0	0	(139,984)	0	0	(139,984)
Balance at Dec. 26, 2010	104,847	625,961	2,978,317	8,149	(2,101,854)	1,615,420
Net earnings	0	0	385,367	0	0	385,367
Other comprehensive loss	0	0	0	(44,092)	0	(44,092)
Comprehensive earnings						341,275
Stock-based compensation transactions	0	(8,266)	0	0	37,895	29,629
Purchases of common stock	0	0	0	0	(423,008)	(423,008)
Stock-based compensation expense	0	12,349	0	0	114	12,463
Dividends declared	0	0	(158,264)	0	0	(158,264)
Balance at Dec. 25, 2011	$ 104,847	$ 630,044	$ 3,205,420	$ (35,943)	$ (2,486,853)	$ 1,417,515