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Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Jun. 29, 2024	Mar. 30, 2024	Dec. 30, 2023	Jul. 01, 2023	Jun. 29, 2024	Jul. 01, 2023
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Impairment of intangible assets				$ 174.8
Intangible asset and equipment impairment charges				186.9	$ 44.8	$ 223.8
Impairment of intangible assets and equipment	$ 0.4			44.3	5.6	44.3
Impairment, assets held-for-use				12.1
Finite-lived intangible assets, fair value				65.8		65.8
Property, plant, and equipment, fair value				4.6		4.6
Ultrasound imaging assets
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Intangible asset and equipment impairment charges				26.4
Ultrasound imaging assets, equipment
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Intangible asset and equipment impairment charges				5.8
Mobidiag \| Right of use asset
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Intangible asset and equipment impairment charges			$ 12.5
In-process research and development
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Intangible asset and equipment impairment charges				10.5
In-process research and development \| Mobidiag
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Intangible asset and equipment impairment charges		$ 4.3
Intangible assets, current	22.4		22.4		22.4
Impairment of intangible assets and equipment			4.3
In-process research and development
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Intangible asset and equipment impairment charges				10.5
Indefinite-lived intangibles, fair value				26.5		$ 26.5
Developed technology
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Impairment of intangible assets	13.3	25.9
Intangible asset and equipment impairment charges				153.7
Finite-lived intangibles	0.0	13.9			0.0
Trade Names
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Impairment of intangible assets	0.4	0.9
Intangible asset and equipment impairment charges				$ 10.7
Finite-lived intangibles	0.0	$ 0.5			0.0
SSI Ultrasound Imaging Business
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Finite-lived intangibles			$ 0.0
2028 Senior Notes
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair value of debt instrument	382.9				382.9
2029 Senior Notes
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair value of debt instrument	853.3				853.3
Credit Agreement
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Borrowed principal	$ 1,200.0				$ 1,200.0
2028 Senior Notes \| Senior Notes
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Stated interest rate	4.625%				4.625%
2029 Senior Notes \| Senior Notes
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Stated interest rate	3.25%				3.25%