Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Contingencies And Commitments [Line Items]
Accrual for reasonably estimable remediation cost	$ 2.7
Maximum [Member]
Contingencies And Commitments [Line Items]
Amount paid to implement remedial action work plan	0.1
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	$ 1.6