Consolidated Statements of Stockholder's Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect Period of Adoption Adjustment	Net Investment Hedging	Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Retained Earnings (Accumulated Deficit) Cumulative Effect Period of Adoption Adjustment	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Net Investment Hedging
Beginning balance at Sep. 30, 2019	$ 1,201,998	$ (1,572)		$ 1,149	$ 1,502,949	$ (191,390)	$ (1,572)	$ (110,710)
Beginning balance (in shares) at Sep. 30, 2019				114,899
Accounting Standards Update [Extensible List]		Accounting Standards Update 2016-02					Accounting Standards Update 2016-02
Common stock issued for employee stock-based awards				$ 14	(14)
Common stock issued for employee stock-based awards (in shares)				1,370
Shares surrendered by employees to pay taxes related to stock-based awards	(33,232)			$ (4)	(33,228)
Shares surrendered by employees to pay taxes related to stock-based awards (in shares)				(449)
Common stock issued for employee stock purchase plan	8,980			$ 1	8,979
Common stock issued for employee stock purchase plan (in shares)				156
Compensation expense from stock-based awards	73,605				73,605
Net income	77,289					77,289
Unrealized gain (loss) on net investment hedges, net of tax			$ (3,790)						$ (3,790)
Foreign currency translation adjustment	2,677							2,677
Unrealized gain (loss) on available-for-sale securities, net of tax	278							278
Change in pension benefits, net of tax	1,334							1,334
Ending balance at Jun. 27, 2020	1,327,567			$ 1,160	1,552,291	(115,673)		(110,211)
Ending balance (in shares) at Jun. 27, 2020				115,976
Beginning balance at Mar. 28, 2020	1,274,081			$ 1,157	1,536,770	(150,351)		(113,495)
Beginning balance (in shares) at Mar. 28, 2020				115,695
Common stock issued for employee stock-based awards				$ 4	(4)
Common stock issued for employee stock-based awards (in shares)				412
Shares surrendered by employees to pay taxes related to stock-based awards	(9,661)			$ (1)	(9,660)
Shares surrendered by employees to pay taxes related to stock-based awards (in shares)				(131)
Compensation expense from stock-based awards	25,185				25,185
Net income	34,678					34,678
Unrealized gain (loss) on net investment hedges, net of tax			(1,148)						(1,148)
Foreign currency translation adjustment	3,089							3,089
Unrealized gain (loss) on available-for-sale securities, net of tax	822							822
Change in pension benefits, net of tax	521							521
Ending balance at Jun. 27, 2020	1,327,567			$ 1,160	1,552,291	(115,673)		(110,211)
Ending balance (in shares) at Jun. 27, 2020				115,976
Beginning balance at Sep. 30, 2020	$ 1,438,248			$ 1,161	1,602,728	(62,267)		(103,374)
Beginning balance (in shares) at Sep. 30, 2020	116,125			116,125
Common stock issued for employee stock-based awards				$ 15	(15)
Common stock issued for employee stock-based awards (in shares)				1,470
Shares surrendered by employees to pay taxes related to stock-based awards	$ (52,194)			$ (4)	(52,190)
Shares surrendered by employees to pay taxes related to stock-based awards (in shares)				(459)
Common stock issued for employee stock purchase plan	10,484			$ 1	10,483
Common stock issued for employee stock purchase plan (in shares)				144
Compensation expense from stock-based awards	133,896				133,896
Net income	183,980					183,980
Unrealized gain (loss) on net investment hedges, net of tax			(1,559)						(1,559)
Foreign currency translation adjustment	10,581							10,581
Unrealized gain (loss) on available-for-sale securities, net of tax	(307)							(307)
Change in pension benefits, net of tax	1,829							1,829
Ending balance at Jun. 30, 2021	$ 1,724,958			$ 1,173	1,694,902	121,713		(92,830)
Ending balance (in shares) at Jun. 30, 2021	117,280			117,280
Beginning balance at Mar. 31, 2021	$ 1,650,533			$ 1,169	1,676,791	70,510		(97,937)
Beginning balance (in shares) at Mar. 31, 2021				116,855
Common stock issued for employee stock-based awards				$ 6	(6)
Common stock issued for employee stock-based awards (in shares)				608
Shares surrendered by employees to pay taxes related to stock-based awards	(24,953)			$ (2)	(24,951)
Shares surrendered by employees to pay taxes related to stock-based awards (in shares)				(183)
Compensation expense from stock-based awards	43,068				43,068
Net income	51,203					51,203
Unrealized gain (loss) on net investment hedges, net of tax			$ (1,797)						$ (1,797)
Foreign currency translation adjustment	6,457							6,457
Unrealized gain (loss) on available-for-sale securities, net of tax	0
Change in pension benefits, net of tax	447							447
Ending balance at Jun. 30, 2021	$ 1,724,958			$ 1,173	$ 1,694,902	$ 121,713		$ (92,830)
Ending balance (in shares) at Jun. 30, 2021	117,280			117,280