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RELATED-PARTY TRANSACTIONS - Investment in Privately-Held Companies (Details) - USD ($)	1 Months Ended	12 Months Ended
	Oct. 30, 2013	Sep. 27, 2024	Sep. 29, 2023	Sep. 30, 2022	Jan. 31, 2024
Related Party Transaction
Loss from equity method investments		$ 1,000,000.0	$ 1,400,000	$ 3,000,000.0
Impairment of equity method investment		0	16,400,000	0
Accounts payable		59,100,000	64,700,000
Prepaid expenses and other current assets		26,900,000	23,300,000
Purchases \| dpiX LLC
Related Party Transaction
Purchases from related party		$ 18,000,000	18,700,000	21,000,000.0
Equity Method Investee
Related Party Transaction
Percentage of manufacturing capacity	50.00%
dpiX Holding \| Equity Method Investee
Related Party Transaction
Ownership interest (as a percent)		40.00%
Loss from equity method investments		$ 1,000,000.0	200,000	2,600,000
Equity method investments		24,800,000	25,800,000
Accounts payable		$ 3,000,000.0	2,700,000
Percentage of fixed costs		50.00%
dpiX Holding \| Equity Method Investee \| Fixed Cost Commitments
Related Party Transaction
Related party transaction, expected fixed cost		$ 3,100,000			$ 12,400,000
dpiX LLC \| dpiX Holding \| Equity Method Investee
Related Party Transaction
Ownership interest (as a percent)		100.00%
VEC Imaging \| Equity Method Investee
Related Party Transaction
Loss from equity method investments		$ 100,000	400,000	$ 800,000
Equity method investments		2,000,000	2,100,000
Prepaid expenses and other current assets		$ 700,000	$ 700,000