Contingencies - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2021 USD ($)
Contingencies And Commitments [Line Items]
Accrual for reasonably estimable remediation cost	$ 2.2
Maximum [Member]
Contingencies And Commitments [Line Items]
Amount paid to implement remedial action work plan	0.6
Short-term Other Accrued Liabilities [Member]
Contingencies And Commitments [Line Items]
Accrual for reasonably estimable remediation cost	1.1
Other Non-current Liabilities [Member]
Contingencies And Commitments [Line Items]
Accrual for reasonably estimable remediation cost	$ 1.1