Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock And Additional Paid in Capital	Number of Common Shares	Treasury Stock	Accumulated Other Comprehensive Income	Accumulated Deficit
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
Treasury Stock, Shares at Sep. 27, 2014				(13,576)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances under stock plans			1,727
Issuances Under Stock Plans, Value	18,724	18,724
Stock-based compensation	20,653	20,653
Repurchases of Treasury Stock, Shares				(4,672)
Repurchases of Treasury Stock, Value	(97,693)			$ (97,693)
Stock Repurchased and Retired During Period, Shares			(1,154)
Repurchase and retirement of treasury stock, value	(25,069)	(25,069)
Acquisition of non-controlling interest	(3,815)	(3,815)
Other comprehensive income	(16,345)				(16,345)
Net income	377,261					377,261
Common Stock, Shares, Issued at Oct. 03, 2015			96,306
Treasury Stock, Shares at Oct. 03, 2015				(18,248)
Balance at Oct. 03, 2015	1,520,471	6,075,579		$ (314,550)	66,571	(4,307,129)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances under stock plans			1,835
Issuances Under Stock Plans, Value	18,221	18,221
Stock-based compensation	26,709	26,709
Repurchases of Treasury Stock, Shares				(6,862)
Repurchases of Treasury Stock, Value	(142,246)			$ (142,246)
Other comprehensive income	(1,190)				(1,190)
Net income	$ 187,838					187,838
Common Stock, Shares, Issued at Oct. 01, 2016	98,141		98,141
Treasury Stock, Shares at Oct. 01, 2016	(25,110)			(25,110)
Balance at Oct. 01, 2016	$ 1,609,803	6,120,509		$ (456,796)	65,381	(4,119,291)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances under stock plans			3,531
Issuances Under Stock Plans, Value	27,129	27,129
Stock-based compensation	37,450	37,450
Repurchases of Treasury Stock, Shares				(4,898)
Repurchases of Treasury Stock, Value	(176,944)			$ (176,944)
Other comprehensive income	11,413				11,413
Net income	$ 138,833					138,833
Common Stock, Shares, Issued at Sep. 30, 2017	101,672		101,672
Treasury Stock, Shares at Sep. 30, 2017	(30,008)			(30,008)
Balance at Sep. 30, 2017	$ 1,647,684	$ 6,185,088		$ (633,740)	$ 76,794	$ (3,980,458)