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Financial and capital risk management (Details 9) - Embedded Derivatives Gas Purchase [Member] - Risk Pellet Price Increase [Member]
$ in Millions
Dec. 31, 2024
USD ($)
IfrsStatementLineItems [Line Items]  
Fair value of liabilities
Sensitivity Scenario I [Member]  
IfrsStatementLineItems [Line Items]  
Fair value of liabilities (2)
Sensitivity Scenario Ii [Member]  
IfrsStatementLineItems [Line Items]  
Fair value of liabilities $ (5)