Note 12 Revenue and Gross Profit by Segment (Details) $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 28, 2020 USD ($)	Mar. 30, 2019 USD ($)	Mar. 28, 2020 USD ($)	Mar. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Net sales		$ 1,590,550	$ 2,126,639	$ 3,430,721	$ 4,314,657
Gross profit		107,421	153,102	$ 242,303	302,439
Number of Reportable Segments				1
Operating Segments
Segment Reporting Information [Line Items]
Gross profit		110,003	155,129	$ 247,797	306,304
Operating Segments | IMS
Segment Reporting Information [Line Items]
Net sales		1,300,324	1,793,119	2,844,259	3,586,301
Gross profit		75,435	114,837	176,617	225,493
Operating Segments | CPS
Segment Reporting Information [Line Items]
Net sales		327,323	394,985	663,754	850,788
Gross profit		34,568	40,292	71,180	80,811
Intersegment revenue
Segment Reporting Information [Line Items]
Net sales		(37,097)	(61,465)	(77,292)	(122,432)
Unallocated items
Segment Reporting Information [Line Items]
Gross profit	[1]	$ (2,582)	$ (2,027)	$ (5,494)	$ (3,865)

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