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Restructuring (Details) $ in Millions	3 Months Ended					9 Months Ended
Restructuring (Details) $ in Millions	Jun. 28, 2025 USD ($) position	Mar. 29, 2025 USD ($) position	Jun. 29, 2024 USD ($)	Dec. 30, 2023 USD ($) position	Dec. 25, 2021 project	Jun. 28, 2025 USD ($)	Jun. 29, 2024 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of positions eliminated \| position	85	50
Severance costs		$ 5.0
CHINA
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Severance costs	$ 4.1
Mobidiag
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of positions eliminated \| position				190
Severance costs				$ 1.8		$ 11.9
Accelerated depreciation				7.2
Lease asset impairment charges				$ 12.5
Restructuring cost incurred to date	16.4					16.4
Mobidiag \| Facility Closing
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Severance costs	1.0		$ 3.9			3.4	$ 7.9
Danbury closure
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of positions eliminated \| project					117
Severance costs	0.0		$ 0.9			1.4	$ 2.7
Restructuring cost incurred to date	9.0					9.0
Danbury closure \| Facility Closing
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring costs	$ 0.7					$ 1.8