Commitments and contingencies - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2024 USD ($) case site	Dec. 31, 2023 USD ($)
Site Contingency [Line Items]
Accrual for reasonably estimable environmental remediation and related matters	$ 91,625,000	$ 91,106,000
Environmental Remediation Sites NL Named As PRP Or Defendant
Site Contingency [Line Items]
Accrual for reasonably estimable environmental remediation and related matters	$ 92,000,000
Number of sites associated with remediation and related costs	33
Number of sites currently not able to reasonably estimate a range of costs | site	5
Maximum | Environmental Remediation Sites NL Named As PRP Or Defendant
Site Contingency [Line Items]
Upper end range, estimate costs for remediation and related matters	$ 118,000,000
Lead Pigment Litigation
Site Contingency [Line Items]
Period by which loss contingency claims settled and dismissed (in years)	30 years
Remaining litigation settlement payment due in first year	$ 16,700,000
Lead Pigment Litigation | Minimum
Site Contingency [Line Items]
Number of cases settled and dismissed and found not liable | case	100