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Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020 USD ($) Site unit_Lawsuit	Sep. 30, 2020 USD ($) Site unit_Lawsuit	Dec. 31, 2019 USD ($)
Site Contingency [Line Items]
Number of non-owned sites Company is named Potentially Responsible Party | Site	13	13
Number of non-owned sites the Company is identified as a de minimis party | Site	12	12
Number of non-owned sites company is in agreement on amount of de minimis settlement | Site	8	8
Number of non-owned sites company is continuing to investigate | Site	4	4
Total environmental reserves	$ 30.3	$ 30.3	$ 28.9
Payments for environmental matters		(4.5)
Foreign currency translation gain (loss)		$ (0.1)
Litigation settlement amount awarded to other party	$ 6.8
Number of class action lawsuits | unit_Lawsuit	2	2
HCC Industries
Site Contingency [Line Items]
Environmental expense		$ 6.0
Reserves related to an owned site acquired	$ 7.8	$ 7.8	$ 9.0

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Number of non-owned sites the Company is identified as a de minimis party.

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Total costs accrued as of the balance sheet date for environmental loss contingencies.

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