Organization and Subsidiaries - Percentage of ownership (Details)
|
12 Months Ended |
Dec. 31, 2025 |
Dec. 31, 2024 |
| ARL Services, LLC | North America Silicon Metal and Alloys |
|
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| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Core Metals Group Holdings, LLC | North America Silicon Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Cuarzos Industriales de Venezuela, S.A. | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Emix, S.A.S. | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
|
99.90%
|
| Ferroatlantica de Mexico, S.A. de C.V. | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
99.90%
|
99.90%
|
| Ferroatlantica de Venezuela (FerroVen), S.A. | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
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| Proportion of ownership interest in subsidiary |
99.90%
|
70.00%
|
| Ferroatlantica Deutschland, GmbH | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroatlantica Brasil Mineracao Ltda. | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
70.00%
|
100.00%
|
| Ferroglobe Advanced Materials II, S.L | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
|
100.00%
|
| Ferroglobe Advanced Materials, S.L. | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe Argentina, S.R.L | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe Canada ULC | North America Silicon Metal |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe Corporate Services, S.L.U. | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe Cuarzos Industriales Mining, S.A.U. | Europe Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe de Participaciones, S.L.U | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe Finance Company, PLC | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe France SAS | Europe Silicon Metal and Alloys |
|
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| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary - Direct |
|
100.00%
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe Holding Company, LTD | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary - Direct |
100.00%
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe Innovation, S.L | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe Mangan Norge AS | Europe Manganese |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe Manganese France SAS | Europe Manganese |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
99.90%
|
| Ferroglobe Monzn, S.L. | Europe Manganese |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
99.90%
|
100.00%
|
| Ferroglobe Netherlands, B.V. | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe RAMSA Mining, S.A. | Europe Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
|
| Ferroglobe South Africa (Pty) Ltd | The Palamo Mining Investment Fund No.1 LLP | Ordinary shares |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Ownership interest |
26.00%
|
26.00%
|
| Ferroglobe South Africa (Pty) Ltd | South Africa Silicon Metal And Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe Spain Metals, S.A.U. | Europe - Manganese and Silicon |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A Alloys I, Inc | North America Silicon Metal |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A ARLR, LLC | North America Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A BG, LLC | North America Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A Bridgeport, LLC | North America Silicon Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A ECPI, Inc. | North America Silicon Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A Financial, Inc. | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A GBG Financial, LLC | North America Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A LF Resources, Inc | North America Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A LFR, Inc | North America Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A Metallurgical, Inc. | North America Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A Metals, LLC. | North America Silicon Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A Mining Sales, LLC | North America Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A Mining Services, LLC | North America Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A Mining, LLC | North America Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A MPM, LLC | North America Silicon Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A Quartz, Inc. | North America Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A Sales, Inc. | North America Silicon Metal |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe U.S.A, Inc | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ferroglobe USA Silica Fume Sales, Inc. | North America Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| FerroManganese Mauritania SARL | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
90.00%
|
90.00%
|
| Ferroquartz Holdings, Ltd (Hong Kong) | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| FerroQuartz Mauritania SARL | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
90.00%
|
90.00%
|
| Ferrosolar R&D SL. | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
50.00%
|
50.00%
|
| FerroTambao, SARL | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
90.00%
|
90.00%
|
| GBG Holdings, LLC | North America Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Globe Metals Enterprises, Inc. | North America Silicon Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| GSM Alloys II, Inc. | North America Silicon Metal |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| GSM Enterprises Holdings, Inc. | North America Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| GSM Enterprises, LLC | North America Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
98.00%
|
| Kintuck (France) SAS | Europe Manganese |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Kintuck AS | Europe Manganese |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Mangshi FerroAtlantica Mining Industry Service Company Ltd | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| Ningxia Yonvey Coal Industrial Co., Ltd. | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
98.00%
|
51.00%
|
| Quebec Silicon General Partner |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
51.00%
|
|
| Quebec Silicon General Partner | North America Silicon Metal |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
51.00%
|
51.00%
|
| Quebec Silicon Limited Partnership | North America Silicon Metal |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
51.00%
|
74.00%
|
| Rebone Mining (Pty.), Ltd. | South Africa Silicon Metal And Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
74.00%
|
100.00%
|
| Silicon Technology (Pty.), Ltd. | South Africa Silicon Metal And Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
92.40%
|
| Solsil, Inc. | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
92.40%
|
74.00%
|
| Thaba Chueu Mining (Pty.), Ltd. | South Africa Silicon Metal And Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
74.00%
|
100.00%
|
| Ultracore Energy SA | Other segments |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
100.00%
|
| West Virginia Alloys, Inc. | North America Silicon Metal and Alloys |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
100.00%
|
51.00%
|
| WVA Manufacturing, LLC | North America Silicon Metal |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Proportion of ownership interest in subsidiary |
51.00%
|
|