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Financial and capital risk management (Details 17) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Cash And Cash Equivalents Current [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | $ 3,660 | $ 4,797
Cash And Cash Equivalents Current [Member] | Moody's, Aa1 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure |  | 32
Cash And Cash Equivalents Current [Member] | Moody's, Aa2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 338 | 342
Cash And Cash Equivalents Current [Member] | Moody's, Aa3 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 42 | 239
Cash And Cash Equivalents Current [Member] | Moody's, A1 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 2,022 | 1,746
Cash And Cash Equivalents Current [Member] | Moody's, A2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 309 | 938
Cash And Cash Equivalents Current [Member] | Moody's, A3 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 186 | 918
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 | 16 | 7
Cash And Cash Equivalents Current [Member] | Moody's, Ba1 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 85 |
Cash And Cash Equivalents Current [Member] | Moody's, Ba2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 287 | 411
Cash And Cash Equivalents Current [Member] | Moody's, Ba3 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 373 | 164
Derivatives [member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 815 | 538
Derivatives [member] | Moody's, Aa2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure |  | 5
Derivatives [member] | Moody's, Aa3 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure |  |
Derivatives [member] | Moody's, A1 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 50 | 97
Derivatives [member] | Moody's, A2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 293 | 145
Derivatives [member] | Moody's, A3 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 22 | 63
Derivatives [member] | Moody's, Ba1 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure |  |
Derivatives [member] | Moody's, Ba2 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | 314 | 174
Derivatives [member] | Moody's, Ba3 Rating [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit exposure | $ 136 | $ 54

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