Note 14 Revenue and Gross Profit by Segment (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 28, 2019	Sep. 29, 2018		Sep. 30, 2017
Segment Information [Line Items]
Net sales		$ 8,233,859	$ 7,110,130		$ 6,868,619
Gross profit		591,938	463,783		519,911
Depreciation and amortization		$ 116,949	118,820		118,751
Revenue percentage generated by reportable segment		80.00%
Property, Plant and Equipment, Additions		$ 112,408	118,597		140,634
IMS
Segment Information [Line Items]
Number of reportable segments		1
Operating segments
Segment Information [Line Items]
Gross profit		$ 600,389	470,196		531,504
Depreciation and amortization		107,629	106,119		105,878
Property, Plant and Equipment, Additions		108,572	116,117		136,512
Operating segments | IMS
Segment Information [Line Items]
Net sales		6,907,129	5,847,958		5,645,499
Gross profit		444,168	352,361		404,350
Depreciation and amortization		81,997	76,071		74,769
Property, Plant and Equipment, Additions		79,943	87,421		106,000
Operating segments | CPS
Segment Information [Line Items]
Net sales		1,555,117	1,458,754		1,422,264
Gross profit		156,221	117,835	[1]	127,154
Depreciation and amortization		25,632	30,048		31,109
Property, Plant and Equipment, Additions		28,629	28,696		30,512
Segment reconciling items
Segment Information [Line Items]
Gross profit	[2]	(8,451)	(6,413)		(11,593)
Unallocated corporate items
Segment Information [Line Items]
Depreciation and amortization	[3]	9,320	12,701		12,873
Property, Plant and Equipment, Additions	[3]	3,836	2,480		4,122
Intersegment eliminations
Segment Information [Line Items]
Net sales		$ (228,387)	$ (196,582)		$ (199,144)

[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 revenue and gross profit. These items consist of stock-based compensation expense, amortization of intangible assets, charges or credits resulting from distressed customers and acquisition-related items.

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