The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

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Restructuring Charges - Additional Information (Details)	3 Months Ended					12 Months Ended
	Sep. 27, 2025 USD ($)	Jun. 28, 2025 USD ($)	Mar. 29, 2025 USD ($) Segment	Dec. 30, 2023 USD ($) location	Dec. 25, 2021 position	Sep. 27, 2025 USD ($)	Sep. 28, 2024 USD ($) position	Sep. 30, 2023 USD ($)
Restructuring Cost and Reserve [Line Items]
Severance charges			$ 5,000,000
Number of positions eliminated \| Segment			50
Restructuring charges						$ 28,600,000	$ 41,100,000	$ 12,000,000.0
Facility Closing
Restructuring Cost and Reserve [Line Items]
Accelerated depreciation	$ 9,800,000
Various Locations
Restructuring Cost and Reserve [Line Items]
Severance charges							$ 3,900,000	9,400,000
Number of positions eliminated \| position							34
Danbury, Connecticut
Restructuring Cost and Reserve [Line Items]
Severance charges						9,000,000
Number of positions eliminated \| position					117
Danbury, Connecticut \| Facility Closing
Restructuring Cost and Reserve [Line Items]
Severance charges						1,400,000	$ 3,900,000	$ 2,100,000
Restructuring charges						1,800,000
Q4 Fiscal 2025 Action [Member]
Restructuring Cost and Reserve [Line Items]
Severance charges	6,800,000
Expected cost	$ 8,100,000					8,100,000
Number of positions eliminated	118
Mobidiag
Restructuring Cost and Reserve [Line Items]
Accelerated depreciation				$ 7,200,000
Other asset impairment charges				12,500,000
Severance charges				$ 1,800,000		3,400,000	$ 13,000,000
Number of positions eliminated \| location				190
Cost incurred to date		$ 16,400,000
United Kingdom
Restructuring Cost and Reserve [Line Items]
Accelerated depreciation						9,800,000
Severance charges						3,200,000
Expected cost	$ 6,000,000					$ 6,000,000
Number of positions eliminated						139
United Kingdom \| Cost of revenue
Restructuring Cost and Reserve [Line Items]
Accelerated depreciation						$ 9,100,000
CHINA
Restructuring Cost and Reserve [Line Items]
Severance charges		$ 4,300,000
Number of positions eliminated		89