v3.26.1
Provisions - Environmental, litigation in progress and third-party liability (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Other provisions [abstract]      
Non-current provisions $ 30,487,000 $ 24,384,000  
Current provisions 87,308,000 83,132,000  
Provisions 117,795,000 107,516,000 $ 142,727,000
Provision reversal 5,039,000 8,584,000  
Environmental rehabilitation      
Other provisions [abstract]      
Non-current provisions 185,000 163,000  
Current provisions 711,000 1,448,000  
Provision for Litigation      
Other provisions [abstract]      
Settlement Paid By Company 2,675,000    
Reversal of provisions for cost of restructuring 1,312,000    
Provision reversal 2,566,000    
Provision for Litigation | FerroPem, S.A.S.      
Other provisions [abstract]      
Current provisions 568,000 587,000  
Provisions for third-party liability      
Other provisions [abstract]      
Non-current provisions 7,963,000 8,263,000  
Provisions 7,963,000 8,263,000 $ 10,596,000
Provisions for third-party liability | Ferroglobe France.      
Other provisions [abstract]      
Non-current provisions $ 7,963,000 $ 8,263,000