Earnings Per Share (Reconciliation Of Earnings Per Share Basic And Diluted) (Details) (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Sep. 25, 2011	Sep. 26, 2010	Sep. 25, 2011	Sep. 26, 2010
Earnings Per Share [Abstract]
Income from continuing operations used in computing basic and diluted earnings per share	$ 183,594	$ 93,717	$ 493,434	$ 301,745
Denominator for basic earnings per share-weighted-average common shares	233,800,000	233,504,000	233,989,000	233,232,000
Effect of dilutive securities - employee stock compensation plan	2,061,000	1,282,000	1,992,000	1,395,000
Denominator for diluted earnings per share- adjusted weighted-average shares outstanding	235,861,000	234,786,000	235,981,000	234,627,000
Basic	$ 0.79	$ 0.40	$ 2.11	$ 1.29
Diluted	$ 0.78	$ 0.40	$ 2.09	$ 1.29
Shares considered anti-dilutive and excluded from computation	3,800,000	4,100,000	3,700,000	4,200,000