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Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Dec. 30, 2023 | Dec. 28, 2024
Mobidiag | Right of use asset |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Intangible asset impairment charge | $ 12.5 |
In-process research and development | Mobidiag |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Intangible asset impairment charge | 4.3 |
Intangible assets, current | $ 22.4 |
2028 Senior Notes |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Fair value of debt instrument |  | $ 387.4
2029 Senior Notes |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Fair value of debt instrument |  | 860.9
Credit Agreement |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Borrowed principal |  | $ 1,200.0
2028 Senior Notes | Senior Notes |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Stated interest rate |  | 4.625%
2029 Senior Notes | Senior Notes |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Stated interest rate |  | 3.25%

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