Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total USD ($)	Common Stock And Additional Paid in Capital USD ($)	Number of Common Shares	Treasury Stock USD ($)	Accumulated Other Comprehensive Income USD ($)	Accumulated Deficit USD ($)
Balance at Oct. 01, 2011	$ 770,517	$ 6,054,747		$ (213,828)	$ 70,738	$ (5,141,140)
Treasury Stock, Shares at Oct. 01, 2011				(13,301,000)
Common Stock, Shares, Issued at Oct. 01, 2011			94,035,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances under stock plans			936,000
Issuances Under Stock Plans, Value	2,595	2,595
Stock-based compensation	17,999	17,999
Repurchases of Treasury Stock, Shares	(35,000)			(35,000)
Repurchases of Treasury Stock, Value	(305)			(305)
Other comprehensive income (loss)	(7,259)				(7,259)
Net income	180,234					180,234
Balance at Sep. 29, 2012	963,781	6,075,341		(214,133)	63,479	(4,960,906)
Common Stock, Shares, Issued at Sep. 29, 2012			94,971,000
Treasury Stock, Shares at Sep. 29, 2012				(13,336,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances under stock plans			2,687,000
Issuances Under Stock Plans, Value	11,611	11,611
Stock-based compensation	17,524	17,524
Repurchases of Treasury Stock, Shares	(169,000)			(169,000)
Repurchases of Treasury Stock, Value	(1,525)			(1,525)
Other comprehensive income (loss)	20,822				20,822
Net income	79,351					79,351
Balance at Sep. 28, 2013	1,091,564	6,104,476		(215,658)	84,301	(4,881,555)
Common Stock, Shares, Issued at Sep. 28, 2013	97,658,000		97,658,000
Treasury Stock, Shares at Sep. 28, 2013	(13,505,000)			(13,505,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances under stock plans			2,234,000
Issuances Under Stock Plans, Value	16,859	16,859
Stock-based compensation	18,789	18,789
Repurchases of Treasury Stock, Shares	(71,000)			(71,000)
Repurchases of Treasury Stock, Value	(1,199)			(1,199)
Stock Repurchased and Retired During Period, Shares	(4,159,000)		(4,159,000)
Stock Repurchased and Retired During Period, Value	(75,038)	(75,038)
Other comprehensive income (loss)	(1,385)				(1,385)
Net income	197,165					197,165
Balance at Sep. 27, 2014	$ 1,246,755	$ 6,065,086		$ (216,857)	$ 82,916	$ (4,684,390)
Common Stock, Shares, Issued at Sep. 27, 2014	95,733,000		95,733,000
Treasury Stock, Shares at Sep. 27, 2014	(13,576,000)			(13,576,000)