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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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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI https://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460 + Details
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- Definition The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(a)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(9)(a)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(7)(c)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 + Details
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