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Related-Party Transactions (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) $ / shares	Dec. 31, 2018 USD ($)	Dec. 31, 2021 £ / shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 £ / shares	Dec. 31, 2020 USD ($) $ / shares shares	Nov. 30, 2020	Jul. 31, 2020
Nikkei-MEL Co. Limited
Related Party Transaction [Line Items]
Equity method investment, ownership percentage						50.00%
Ordinary shares
Related Party Transaction [Line Items]
Common stock, par value (in GBP per share) | (per share)			$ 0.50		£ 0.50	$ 0.50	£ 0.50	$ 0.50
Equity Method Investee | Nikkei-MEL Co. Limited
Related Party Transaction [Line Items]
Accounts receivable, related parties						$ 0.1		$ 0.2
Equity Method Investee | Elektron | Nikkei-MEL Co. Limited
Related Party Transaction [Line Items]
Sales to related parties	$ 0.8	$ 0.6
Equity Method Investee | Luxfer Uttam India Private Limited
Related Party Transaction [Line Items]
Equity method investment, ownership percentage										51.00%
Related party transaction, amounts of transaction				$ 1.6
Equity Method Investee | Luxfer Uttam India Private Limited | Gas Cylinders
Related Party Transaction [Line Items]
Sales to related parties		1.5	$ 6.4
Equity Method Investee | Sub161 Pty Limited
Related Party Transaction [Line Items]
Equity method investment, ownership percentage								26.40%	26.00%
Sales to related parties		$ 0.0
Executive Leadership Team | Ordinary shares
Related Party Transaction [Line Items]
Number of common stock owned by related parties (in shares) | shares						500,237		425,413
Number of awards held by related parties (in shares) | shares						299,021		248,522
President | Cherokee Properties Inc.
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction			$ 1.1

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