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Summary of Significant Accounting Policies - Intangible Assets (Details)	3 Months Ended						12 Months Ended
	Jun. 29, 2024 USD ($)	Mar. 30, 2024 USD ($)	Dec. 30, 2023 USD ($)	Jul. 01, 2023 USD ($)	Sep. 24, 2022 USD ($)	Jun. 25, 2022 USD ($)	Sep. 28, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 24, 2022 USD ($)
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment				$ 174,800,000
Impairment of intangible assets and equipment				186,900,000			$ 5,600,000	$ 44,300,000	$ 27,700,000
Ultrasound Imaging Assets
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment				26,400,000
Ultrasound Imaging Assets, Equipment
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment				5,800,000
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment				10,500,000
Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life							5 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life							30 years
Developed technology
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net		$ 13,900,000					$ 0
Trade names
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net		500,000					0
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, fair value				$ 26,500,000
In-process research and development | Valuation Technique, Discounted Cash Flow
Finite-Lived Intangible Assets [Line Items]
Measurement input				0.170
Ultrasound Imaging Assets, Developed Technology
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment				$ 20,600,000
Mobidiag
Finite-Lived Intangible Assets [Line Items]
Accelerated amortization			$ 7,300,000
Mobidiag | In-process research and development
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment			4,300,000
Intangible assets, current			22,400,000				$ 22,400,000
Impairment of intangible assets and equipment			4,300,000
Mobidiag | Customer relationship
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net			0
Mobidiag | Trade names
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net			$ 0
Mobidiag Oy
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment				186,900,000
Mobidiag Oy | Equipment
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment				12,100,000
Mobidiag Oy | Trade names
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment				10,700,000
Mobidiag Oy | Customer relationship
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment				10,400,000
Mobidiag Oy | Developed Technology
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment				$ 153,700,000	$ 27,700,000
Focal Therapeutics
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment		26,800,000
Focal Therapeutics | Developed technology
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment	$ 13,300,000	25,900,000
Finite-lived intangible assets, net		13,900,000
Focal Therapeutics | Trade names
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment	$ 400,000	900,000
Finite-lived intangible assets, net		$ 500,000
Focal Therapeutics | Developed Technology
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment					$ 8,200,000
Faxitron | Developed Technology
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets and equipment						$ 9,200,000

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