Earnings Per Share (Reconciliation Of Earnings Per Share Basic And Diluted) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 27, 2016	Mar. 29, 2015
Numerator:
Net income	$ 250,489	$ 269,854
Denominator:
Denominator for basic earnings per share - weighted-average common shares	183,429	210,629
Effect of dilutive securities - employee stock compensation plan	775	1,159
Denominator for diluted earnings per share - adjusted weighted-average shares outstanding	184,204	211,788
Basic (in dollars per share)	$ 1.37	$ 1.28
Diluted (in dollars per share)	$ 1.36	$ 1.27