Restructuring Charges - Restructuring and Related Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2021	Oct. 03, 2020
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 2,841	$ 8,494
Provision	12,282	5,291
Payments and other	(13,715)	(10,944)
Restructuring reserve, ending balance	1,408	2,841
Severance Related
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	2,611	8,279
Provision	3,795	2,468
Payments and other	(5,279)	(8,136)
Restructuring reserve, ending balance	1,127	2,611
Asset Write-Offs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0	0
Provision	5,637	2,194
Payments and other	(5,637)	(2,194)
Restructuring reserve, ending balance	0	0
Other
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	230	215
Provision	2,850	629
Payments and other	(2,799)	(614)
Restructuring reserve, ending balance	$ 281	$ 230