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Other charges	12 Months Ended
	Dec. 31, 2021
Other Income and Expenses [Abstract]
Other charges	Other charges Other charges of $1.1 million in 2021 relates to the settlement of a class action lawsuit in the Gas Cylinders segment in relation to an alleged historic violation of the California Labor Code, concerning a Human Resources administration matter. The Company paid the settlement during the year, with no additional charge to the income statement expected. In 2019, the Company decided to commence a project to remove low-level naturally occurring radioactive material (NORM) from a redundant building at Elektron's Manchester, U.K. site. The work represented remediation of a legacy environmental issue and was completed in 2021. In 2020 and 2019, the Company recognized $0.4 million and $2.5 million, respectively, in other charges on the Statements of Income related to this remediation. This work is now complete and all liabilities have been settled.

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The entire disclosure for other operating income and other operating expense items.

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