Financial and capital risk management (Details 11) - USD ($)
$ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
| Cash And Cash Equivalents Current [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
$ 5,765
|
$ 7,566
|
| Cash And Cash Equivalents Current [Member] | Aa 2 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
507
|
721
|
| Cash And Cash Equivalents Current [Member] | Aa 3 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
32
|
|
| Cash And Cash Equivalents Current [Member] | A 1 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
2,139
|
2,918
|
| Cash And Cash Equivalents Current [Member] | A 2 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
1
|
1
|
| Cash And Cash Equivalents Current [Member] | A 3 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
887
|
1,339
|
| Cash And Cash Equivalents Current [Member] | Baa 1 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
|
2
|
| Cash And Cash Equivalents Current [Member] | Baa 2 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
13
|
55
|
| Cash And Cash Equivalents Current [Member] | Baa 3 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
28
|
|
| Cash And Cash Equivalents Current [Member] | Ba 1 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
1,383
|
1,658
|
| Cash And Cash Equivalents Current [Member] | Ba 2 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
775
|
872
|
| Derivatives [member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
1,035
|
617
|
| Derivatives [member] | Aa 2 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
7
|
1
|
| Derivatives [member] | A 1 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
307
|
169
|
| Derivatives [member] | A 2 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
17
|
|
| Derivatives [member] | A 3 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
104
|
61
|
| Derivatives [member] | Ba 1 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
295
|
198
|
| Derivatives [member] | Ba 2 Rating [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Credit exposure |
$ 305
|
$ 188
|