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Summary of Significant Accounting Policies - Estimated Useful Lives of Property, Plant and Equipment (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jul. 01, 2023	Sep. 28, 2024	Sep. 30, 2023	Sep. 24, 2022
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		$ 1,266.5	$ 1,231.0
Less - accumulated depreciation and amortization		(728.7)	(714.0)
Property, plant and equipment, net		537.8	517.0	$ 481.6
Impairment of intangible assets and equipment	$ 186.9	5.6	44.3	$ 27.7
Mobidiag | Property, Plant and Equipment
Property, Plant and Equipment [Line Items]
Impairment of intangible assets and equipment	12.1
Ultrasound Imaging Assets | Property, Plant and Equipment
Property, Plant and Equipment [Line Items]
Impairment of intangible assets and equipment	$ 5.8
Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		$ 378.1	380.0
Equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life		3 years
Equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life		10 years
Equipment under customer usage agreements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		$ 523.1	508.1
Equipment under customer usage agreements | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life		3 years
Equipment under customer usage agreements | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life		8 years
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		$ 247.1	230.0
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life		20 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life		35 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		$ 44.0	44.4
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		40.8	41.1
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		$ 24.6	19.2
Furniture and fixtures | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life		5 years
Furniture and fixtures | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life		7 years
Finance lease right-of-use asset
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		$ 8.8	$ 8.2

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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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