BUSINESS SEGMENT - Revenue and Gross Profit by Segment (Details) $ in Thousands		3 Months Ended		9 Months Ended
		Jun. 28, 2025 USD ($)	Jun. 29, 2024 USD ($)	Jun. 28, 2025 USD ($)	Jun. 29, 2024 USD ($)
Segment Reporting Information [Line Items]
Net sales		$ 2,041,562	$ 1,841,430	$ 6,031,990	$ 5,550,823
Gross profit		181,050	153,539	$ 525,200	469,136
Number of Reportable Segments				1
Operating Segments
Segment Reporting Information [Line Items]
Gross profit		186,006	157,050	$ 547,423	485,065
Operating Segments | IMS
Segment Reporting Information [Line Items]
Net sales		1,648,404	1,477,499	4,875,352	4,444,209
Gross profit		123,802	112,364	375,774	338,114
Operating Segments | CPS
Segment Reporting Information [Line Items]
Net sales		422,388	388,220	1,249,141	1,180,558
Gross profit		62,204	44,686	171,649	146,951
Intersegment revenue
Segment Reporting Information [Line Items]
Net sales		(29,230)	(24,289)	(92,503)	(73,944)
Unallocated items
Segment Reporting Information [Line Items]
Gross profit	[1]	$ (4,956)	$ (3,511)	$ (22,223)	$ (15,929)

[1] For purposes of evaluating segment performance, management excludes certain items from its measures of gross profit. These items consist of stock-based compensation expense, litigation settlements and charges resulting from distressed customers.