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Plant Closure Provisions - Additional Information (Detail) - USD ($) $ in Millions | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019
Operating Segments [Member] | Tetra Ethyl Lead [Member] | Operating Segments [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Additional provision restructuring charges plant closure | $ 7.5 |
Remediation [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Accretion expense recognized | $ 9.8 | $ 2.1

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