Note 15 Revenue and Gross Profit by Segment (Details) - USD ($) $ in Thousands		12 Months Ended
		Oct. 03, 2020	Sep. 28, 2019		Sep. 29, 2018
Segment Information [Line Items]
Net sales		$ 6,960,370	$ 8,233,859		$ 7,110,130
Gross profit		525,707	591,938		463,783
Depreciation and amortization		$ 114,218	116,949		118,820
Revenue percentage generated by reportable segment		80.00%
Property, Plant and Equipment, Additions		$ 51,075	112,408		118,597
IMS
Segment Information [Line Items]
Number of reportable segments		1
Operating segments
Segment Information [Line Items]
Gross profit		$ 538,482	600,389		470,196
Depreciation and amortization		107,887	107,629		106,119
Property, Plant and Equipment, Additions		47,848	108,572		116,117
Operating segments | IMS
Segment Information [Line Items]
Net sales		5,733,180	6,907,129		5,847,958
Gross profit		381,638	444,168		352,361
Depreciation and amortization		81,169	81,997		76,071
Property, Plant and Equipment, Additions		23,933	79,943		87,421
Operating segments | CPS
Segment Information [Line Items]
Net sales		1,365,712	1,555,117		1,458,754
Gross profit		156,844	156,221	[1]	117,835
Depreciation and amortization		26,718	25,632		30,048
Property, Plant and Equipment, Additions		23,915	28,629		28,696
Segment reconciling items
Segment Information [Line Items]
Gross profit	[2]	(12,775)	(8,451)		(6,413)
Unallocated corporate items
Segment Information [Line Items]
Depreciation and amortization	[3]	6,331	9,320		12,701
Property, Plant and Equipment, Additions	[3]	3,227	3,836		2,480
Intersegment eliminations
Segment Information [Line Items]
Net sales		$ (138,522)	$ (228,387)		$ (196,582)

[1] During the fourth quarter of 2018, the Company recorded a $12.5 million pre-tax adjustment to correct errors that occurred from 2016 through the third quarter of 2018 with respect to the accounting for certain long-term contracts in one of the Company’s CPS divisions. These errors are immaterial to all prior periods. The impact of this out-of-period adjustment on the full year fiscal 2018 was $11 million which is also immaterial to 2018.

[2] For purposes of evaluating segment performance, management excludes certain items from its measures of gross profit. These items consist of stock-based compensation expense, amortization of intangible assets, charges or credits resulting from distressed customers, litigation settlements and acquisition-related items.

[3] Primarily related to selling, general and administration functions.