Note 14 Revenue and Gross Profit by Segment (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 29, 2018		Sep. 30, 2017	Oct. 01, 2016
Segment Information [Line Items]
Net sales		$ 7,110,130		$ 6,868,619	$ 6,481,181
Gross profit		463,783		519,911	514,282
Depreciation and amortization		$ 118,820		118,751	111,910
Revenue percentage generated by reportable segment		80.00%
Property, Plant and Equipment, Additions		$ 118,597		140,634	110,560
IMS
Segment Information [Line Items]
Number of reportable segments		1
Operating segments
Segment Information [Line Items]
Gross profit		$ 470,196		531,504	519,005
Depreciation and amortization		106,119		105,878	99,098
Property, Plant and Equipment, Additions		116,117		136,512	104,936
Operating segments | IMS
Segment Information [Line Items]
Net sales		5,847,958		5,645,499	5,297,740
Gross profit		352,361		404,350	397,309
Depreciation and amortization		76,071		74,769	66,036
Property, Plant and Equipment, Additions		87,421		106,000	83,084
Operating segments | CPS
Segment Information [Line Items]
Net sales		1,458,754		1,422,264	1,372,412
Gross profit		117,835	[1]	127,154	121,696
Depreciation and amortization		30,048		31,109	33,062
Property, Plant and Equipment, Additions		28,696		30,512	21,852
Segment reconciling items
Segment Information [Line Items]
Gross profit	[2]	(6,413)		(11,593)	(4,723)
Unallocated corporate items
Segment Information [Line Items]
Depreciation and amortization	[3]	12,701		12,873	12,812
Property, Plant and Equipment, Additions	[3]	2,480		4,122	5,624
Intersegment eliminations
Segment Information [Line Items]
Net sales		$ (196,582)		$ (199,144)	$ (188,971)

[1] During the fourth quarter of fiscal 2018, the Company recorded a $12.5 million pre-tax adjustment to correct errors that occurred from fiscal 2016 through the third quarter of fiscal 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 $11.0 million which is also immaterial to fiscal 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.