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Financial and capital risk management (Details 7) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
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IfrsStatementLineItems [Line Items] |  |
Fair value of liabilities | $ 16 | $ (24)
U S Floating Rate Versus U S Fixed Swap Rate [Member] | Risk U S Libor Decrease [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value of liabilities | 16 |
U S Floating Rate Versus U S Fixed Swap Rate [Member] | Risk U S Libor Decrease [Member] | Sensitivity Scenario I [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value of liabilities | (36) |
U S Floating Rate Versus U S Fixed Swap Rate [Member] | Risk U S Libor Decrease [Member] | Sensitivity Scenario Ii [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value of liabilities | (91) |
Protected Item Libor U S Indexed Debt [Member] | Risk U S Libor Decrease [Member] | Sensitivity Scenario I [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value of liabilities | 36 |
Protected Item Libor U S Indexed Debt [Member] | Risk U S Libor Decrease [Member] | Sensitivity Scenario Ii [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value of liabilities | $ 91 |

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