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. 31, 2019	Apr. 01, 2018
Numerator:
Net income used in computing basic and diluted earnings per share	$ 127,945	$ 174,763
Denominator:
Denominator for basic earnings per share - weighted-average common shares (in shares)	159,311	168,139
Effect of dilutive securities - employee stock compensation plan (in shares)	715	1,035
Denominator for diluted earnings per share - adjusted weighted-average shares outstanding (in shares)	160,026	169,174
Basic (in dollars per share)	$ 0.80	$ 1.04
Diluted (in dollars per share)	$ 0.80	$ 1.03