Commitments and contingent liabilities - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Palette Life Sciences AB
Loss Contingencies [Line Items]
Loss contingency accrual	$ 3.5
Italian parliament legislation
Loss Contingencies [Line Items]
Loss contingency accrual	14.5
Loss contingency, loss in period	3.2
Loss contingency, estimate of possible loss	$ 22.9
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]
Waste disposed accrued liability	$ 2.5	$ 2.5
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Other current liabilities	Other current liabilities
Contingency reserve for litigation	$ 0.8	$ 0.5
Other Liabilities
Loss Contingencies [Line Items]
Waste disposed accrued liability	$ 3.8	$ 3.2
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities