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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2025
Accounting Policies [Abstract] |
Schedule of Other Intangible Assets Useful Life | Other intangible assets are measured initially at cost or, when acquired in a business combination, at fair value. Intangible assets with finite useful lives are amortized on a straight-line basis over their estimated useful lives, as shown in the table below.
| Customer relationships | 15 - 25 years |
| Technology and trading related | 5 - 25 years |
Schedule of Investments in Affiliates | The company owns interest in the following affiliate:
| Name of company | Country of incorporation | Holding | Proportion of voting rights and shares held | Classification | Consolidation method |
| Nikkei-MEL Co. Limited | Japan | Ordinary shares | 50% | Joint venture | Equity method |
Schedule of Property, Plant and Equipment Useful Life | The estimated useful lives are 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 equipment | 5 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://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 + 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 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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