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Financial and capital risk management (Details 11) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
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Cash And Cash Equivalents Current [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | $ 5,696 | $ 5,006
Cash And Cash Equivalents Current [Member] | Aa2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 592 | 391
Cash And Cash Equivalents Current [Member] | A1 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 1,944 | 1,874
Cash And Cash Equivalents Current [Member] | A2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 491 | 520
Cash And Cash Equivalents Current [Member] | A3 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 994 | 709
Cash And Cash Equivalents Current [Member] | Baa1 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure |  | 1
Cash And Cash Equivalents Current [Member] | Baa2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 6 | 4
Cash And Cash Equivalents Current [Member] | Ba1 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 765 | 719
Cash And Cash Equivalents Current [Member] | Ba2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 904 | 788
Derivatives [member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 703 | 68
Derivatives [member] | Aa2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 6 | 1
Derivatives [member] | A1 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 155 | 28
Derivatives [member] | A2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 87 | 13
Derivatives [member] | A3 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 50 | 2
Derivatives [member] | Ba1 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 221 | 18
Derivatives [member] | Ba2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | $ 184 | $ 6

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