Earnings Per Share (Reconciliation Of Earnings Per Share Basic And Diluted) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 01, 2018	Mar. 26, 2017
Numerator:
Net income used in computing basic and diluted earnings per share	$ 174,763	$ 186,369
Denominator:
Denominator for basic earnings per share - weighted-average common shares (in shares)	168,139	176,001
Effect of dilutive securities - employee stock compensation plan (in shares)	1,035	1,069
Denominator for diluted earnings per share - adjusted weighted-average shares outstanding (in shares)	169,174	177,070
Basic (in dollars per share)	$ 1.04	$ 1.06
Diluted (in dollars per share)	$ 1.03	$ 1.05