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Commitments and contingent liabilities (Detail) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 29, 2024 USD ($) | Sep. 29, 2024 USD ($)
Loss Contingencies [Line Items] |  |
Estimated litigation liability | $ 0.7 | $ 0.7
Palette Life Sciences AB |  |
Loss Contingencies [Line Items] |  |
Loss contingency accrual | 3.5 | 3.5
Italian Parliament Legislation |  |
Loss Contingencies [Line Items] |  |
Loss contingency, loss in period | 2.0 | 19.8
Loss contingency accrual | $ 35.0 | 35.0
Italian Parliament Legislation, Pertaining To Prior Years |  |
Loss Contingencies [Line Items] |  |
Loss contingency, loss in period |  | $ 13.8
Minimum |  |
Loss Contingencies [Line Items] |  |
Estimated time frame over which accrued amounts may be paid out | 10 years | 10 years
Maximum |  |
Loss Contingencies [Line Items] |  |
Estimated time frame over which accrued amounts may be paid out | 15 years | 15 years
Accrued liabilities |  |
Loss Contingencies [Line Items] |  |
Accrual for environmental loss contingencies | $ 3.0 | $ 3.0
Other liability |  |
Loss Contingencies [Line Items] |  |
Accrual for environmental loss contingencies | $ 1.1 | $ 1.1

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