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Plant Closure Provisions - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 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	$ 11.0	$ 3.2

X

- Definition

Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.

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Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.

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