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Contingencies - Additional Information (Detail) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) unit_Lawsuit Site | Dec. 31, 2019 USD ($)
Site Contingency [Line Items] |  |
Number of non-owned sites Company is named Potentially Responsible Party | Site | 13 |
Number of non-owned sites the Company is identified as a de minimis party | Site | 12 |
Number of non Owned sites company is identified as de minimis party, settlement amount known | Site | 8 |
Number of non Owned sites company is identified as de minimis party, settlement amount unknown | Site | 4 |
Total environmental reserves | $ 32.4 | $ 28.9
Increase (decrease) in environmental reserves | 9.2 |
Total expenses related to environmental matters | 5.6 |
Foreign currency translation | (0.1) |
Amount awarded to other party | $ 6.8 |
Number of class action lawsuits | unit_Lawsuit | 2 |
HCC Industries |  |
Site Contingency [Line Items] |  |
Reserves related to an owned site acquired | $ 7.4 | $ 9.0

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