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Acquisitions and disposals - Additional Information (Details) ₨ in Millions, $ in Millions	1 Months Ended		12 Months Ended
	Sep. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 INR (₨)
Business Acquisition [Line Items]
Acquisition-related costs			$ 0.3	$ 1.5
Gain/ loss on disposition			$ 0.0	$ 6.6	$ 0.0
Merger and acquisition exploration costs					$ 0.4
Luxfer Utlam India Private Limited
Business Acquisition [Line Items]
VIEs ownership percentage					51.00%	51.00%
Proceeds from sale of joint venture partner					$ 1.8	₨ 137.4
Luxfer Utlam India Private Limited | Maximum
Business Acquisition [Line Items]
Gain on sale of investments					$ 0.1
Discontinued operations, disposed of by sale
Business Acquisition [Line Items]
Gain/ loss on disposition		$ 6.6
Discontinued operations, disposed of by sale | U.S Aluminum Business
Business Acquisition [Line Items]
Gain/ loss on disposition		7.1
Discontinued operations, disposed of by sale | Superform U.K. Business
Business Acquisition [Line Items]
Gain/ loss on disposition	$ (0.5)
Structural Composites Industries LLC
Business Acquisition [Line Items]
Consideration transferred		$ 19.3

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