CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 27, 2014	Dec. 28, 2013	Sep. 28, 2013
Stockholders' equity:
Common stock, par value	$ 0.008	$ 0.008	$ 0.008
Common stock, shares authorized	400,000,000	200,000,000	200,000,000
Common stock, shares issued	167,082,000	166,324,000	165,722,000
Common stock, shares outstanding	136,615,000	139,654,000	139,587,000
Preferred stock, par value	$ 1.00	$ 1.00	$ 1.00
Preferred stock, shares authorized	40,000	40,000	40,000
Preferred stock, shares issued	0	0	0
Preferred stock, shares outstanding	0	0	0
Treasury stock - shares	30,467,000	26,670,000	26,135,000