Commitments and contingent liabilities (Detail) $ in Millions	9 Months Ended
	Sep. 25, 2022 USD ($)
Loss Contingencies [Line Items]
Estimated litigation liability	$ 0.2
Minimum
Loss Contingencies [Line Items]
Estimated time frame over which accrued amounts may be paid out	10 years
Minimum | China investigation penalties for tariffs and related interest
Loss Contingencies [Line Items]
Loss contingency accrual, unpaid tariff, penalties percentage	30.00%
Loss contingency, estimate of possible loss	$ 3.0
Maximum
Loss Contingencies [Line Items]
Estimated time frame over which accrued amounts may be paid out	15 years
Maximum | China investigation penalties for tariffs and related interest
Loss Contingencies [Line Items]
Loss contingency accrual, unpaid tariff, penalties percentage	200.00%
Loss contingency, estimate of possible loss	$ 20.0
Accrued liabilities
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	2.0
Other liability
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 4.0