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Related-Party Transactions (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2022 £ / shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 £ / shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 $ / shares	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 | Luxfer Uttam India Private Limited
Related Party Transaction [Line Items]
Equity method investment, ownership percentage								51.00%
Equity Method Investee | Nikkei-MEL Co. Limited
Related Party Transaction [Line Items]
Accounts receivable, related parties				$ 0.1		$ 0.1
Equity Method Investee | Sub161 Pty Limited
Related Party Transaction [Line Items]
Equity method investment, ownership percentage						26.40%
Sales to related parties		$ 0.0
Equity Method Investee | Elektron | Nikkei-MEL Co. Limited
Related Party Transaction [Line Items]
Sales to related parties	$ 0.6	0.8
Equity Method Investee | Gas Cylinders | Luxfer Uttam India Private Limited
Related Party Transaction [Line Items]
Sales to related parties		$ 1.5
Executive Leadership Team | Ordinary shares
Related Party Transaction [Line Items]
Number of common stock owned by related parties (in shares) | shares				233,724		500,237
Number of awards held by related parties (in shares) | shares				231,668		299,021

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