Commitments and contingent liabilities (Detail) $ in Millions	9 Months Ended
	Oct. 01, 2023 USD ($)
Loss Contingencies [Line Items]
Estimated litigation liability	$ 0.6
Italian Parliament Legislation
Loss Contingencies [Line Items]
Loss contingency accrual	12.9
Loss contingency, loss in period	2.2
Loss contingency, estimate of possible loss	$ 18.6
Minimum
Loss Contingencies [Line Items]
Estimated time frame over which accrued amounts may be paid out	10 years
Maximum
Loss Contingencies [Line Items]
Estimated time frame over which accrued amounts may be paid out	15 years
Accrued liabilities
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 2.5
Other liability
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 4.1