Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Oct. 02, 2021	Oct. 03, 2020	Sep. 28, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ (106,751)	$ (414,139)	$ 53,825
Other comprehensive income (loss):
Translation adjustment, net of taxes	[1],[2]	4,736	9,248	(32,609)
Changes in unrealized gains (losses) on available-for-sale securities, net of taxes	[1],[3]	(1)	1	0
Defined benefit pension plans, net of taxes	[1],[4]	114	1,420	(6,560)
Other comprehensive income (loss), net of tax		4,849	10,669	(39,169)
Comprehensive income (loss)		$ (101,902)	$ (403,470)	$ 14,656

[1] Reclassification adjustments were not significant during fiscal 2021, 2020, and 2019.

[2] Tax expenses (benefits) of $(921), $2,731, and $(5,161) were provided on translation adjustments during fiscal 2021, 2020, and 2019, respectively. 

[3] Tax expenses (benefits) were not provided on changes in unrealized gains (losses) on available-for-sale securities during fiscal 2021, 2020, and 2019, respectively.

[4] Tax expenses (benefits) of $152, $713, and $(2,371) were provided on changes in defined benefit pension plans during fiscal 2021, 2020, and 2019, respectively.