Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Apr. 03, 2021	Apr. 04, 2020	Apr. 03, 2021	Apr. 04, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ (158,215)	$ (418,913)	$ (158,071)	$ (413,120)
Other comprehensive income (loss):
Translation adjustment, net of taxes	[1],[2]	(7,358)	(25,267)	8,676	(10,099)
Changes in unrealized gains on available-for-sale securities, net of taxes	[1],[3]	(1)	0	2	0
Defined benefit pension plans, net of taxes	[1],[4]	223	1,478	(95)	1,610
Other comprehensive income (loss), net of tax	[1]	(7,136)	(23,789)	8,583	(8,489)
Comprehensive loss		$ (165,351)	$ (442,702)	$ (149,488)	$ (421,609)

[1] Reclassification adjustments were not significant during the three and six months ended April 3, 2021 and April 4, 2020.

[2] Tax expenses (benefits) of $(4,411) and $856 were provided on translation adjustments during the three and six months ended April 3, 2021, respectively. Tax benefits of $2,044 and $809 were provided on translation adjustments during the three and six months ended April 4, 2020, respectively.

[3] Tax expenses of $0 and $1 were provided on changes in unrealized gains on available-for-sale securities during the three and six months ended April 3, 2021, respectively. Tax expenses (benefits) were not provided on changes in unrealized gains on available-for-sale securities during the three and six months ended April 4, 2020.

[4] Tax expenses of $95 and $32 were provided on changes in defined benefit pension plans for the three and six months ended April 3, 2021, respectively. Tax expenses of $642 and $675 were provided on changes in defined benefit pension plans for the three and six months ended April 4, 2020, respectively.