Financial and capital risk management (Details 4) - Foreign Exchange And Interest Rate Derivatives [Member] - USD ($) $ in Millions |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2025 |
Dec. 31, 2024 |
|
| IfrsStatementLineItems [Line Items] | ||
| Foreign exchange notional amount | $ 9,719 | $ 11,490 |
| Foreign exchange financial settlement inflows | 477 | $ (549) |
| Later Than One Year And There After [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Foreign exchange financial settlement inflows | 222 | |
| Later Than Two Year And There After [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Foreign exchange financial settlement inflows | 165 | |
| Later Than Three Year And There After [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Foreign exchange financial settlement inflows | $ 90 |