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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Schedule of Investments in Affiliates | The company owns interests in the following affiliates:
| Name of company | Country of incorporation | Holding | Proportion of voting rights and shares held | Classification | Consolidation method |
| Luxfer Uttam India Private Limited | India | Ordinary shares | 51% | Joint venture (VIE) | Equity method |
| Nikkei-MEL Co. Limited | Japan | Ordinary shares | 50% | Joint venture | Equity method |
| Sub161 Pty Limited | Australia | Ordinary shares | 26.4% | Associate (VIE) | Equity method |
Schedule of Property, Plant and Equipment Useful Life | The estimated useful lives is summarized as follows:
| Freehold buildings | 10 - 33 years |
| Leasehold land and buildings | The lesser of life of lease or freehold rate |
| Machinery and equipment | 3 - 25 years |
| Including: |  |
| Heavy production equipment (including casting, rolling, extrusion and press equipment) | 20 - 25 years |
| Chemical production plant and robotics | 7 - 10 years |
| Other production machinery | 5 - 10 years |
| Furniture, fittings, storage and equipment | 3 - 10 years |
| Computer software | 4 - 7 years |

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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