Financial and capital risk management (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| IfrsStatementLineItems [Line Items] | ||
| Assets | $ 419 | $ 53 |
| Liabilities | 116 | 197 |
| Not Designated As Hedging Instruments [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Assets | 703 | 68 |
| Liabilities | 228 | 625 |
| Not Designated As Hedging Instruments [Member] | Foreign Exchange And Interest Rate Risk [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Assets | 646 | 52 |
| Liabilities | 169 | 601 |
| Not Designated As Hedging Instruments [Member] | Commodity price risk [member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Assets | 57 | 16 |
| Liabilities | $ 59 | 23 |
| Not Designated As Hedging Instruments [Member] | Embedded Derivatives Risk [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Liabilities | $ 1 |