Financial and capital risk management (Details 9) - Embedded Derivatives Gas Purchase [Member] - Risk Pellet Price Increase [Member] $ in Millions |
Jun. 30, 2025
USD ($)
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| IfrsStatementLineItems [Line Items] | |
| Fair value of liabilities | |
| Sensitivity Scenario I [Member] | |
| IfrsStatementLineItems [Line Items] | |
| Fair value of liabilities | |
| Sensitivity Scenario Ii [Member] | |
| IfrsStatementLineItems [Line Items] | |
| Fair value of liabilities | $ (1) |