Earnings Per Share (Reconciliation Of Earnings Per Share Basic And Diluted) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2016	Jun. 28, 2015	Jun. 26, 2016	Jun. 28, 2015
Numerator:
Net income used in computing basic and diluted earnings per share	$ 280,431	$ 299,810	$ 530,920	$ 569,664
Denominator:
Denominator for basic earnings per share - weighted-average common shares (in shares)	180,587	207,650	181,976	209,115
Effect of dilutive securities - employee stock compensation plan (in shares)	752	940	764	1,050
Denominator for diluted earnings per share - adjusted weighted-average shares outstanding (in shares)	181,339	208,590	182,740	210,165
Basic (in dollars per share)	$ 1.55	$ 1.44	$ 2.92	$ 2.72
Diluted (in dollars per share)	$ 1.55	$ 1.44	$ 2.91	$ 2.71