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Financial and capital risk management (Details 15) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
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Cash And Cash Equivalents Current [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | $ 6,540 | $ 3,660
Cash And Cash Equivalents Current [Member] | Moody's, Aa2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 706 | 338
Cash And Cash Equivalents Current [Member] | Moody's, Aa3 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure |  | 42
Cash And Cash Equivalents Current [Member] | Moody's, A1 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 2,587 | 2,022
Cash And Cash Equivalents Current [Member] | Moody's, A2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 608 | 309
Cash And Cash Equivalents Current [Member] | Moody's, A3 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 1,146 | 186
Cash And Cash Equivalents Current [Member] | Moody's, Baa1 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure |  | 2
Cash And Cash Equivalents Current [Member] | Moody's, Baa2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 20 | 16
Cash And Cash Equivalents Current [Member] | Moody's, Ba1 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 100 | 85
Cash And Cash Equivalents Current [Member] | Moody's, Ba2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 782 | 287
Cash And Cash Equivalents Current [Member] | Moody's, Ba3 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 591 | 373
Derivatives [member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 277 | 815
Derivatives [member] | Moody's, Aa2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 1 |
Derivatives [member] | Moody's, Aa3 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 1 |
Derivatives [member] | Moody's, A1 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 26 | 50
Derivatives [member] | Moody's, A2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 104 | 293
Derivatives [member] | Moody's, A3 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 3 | 22
Derivatives [member] | Moody's, Ba2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 99 | 314
Derivatives [member] | Moody's, Ba3 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | $ 43 | $ 136

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