Financial instruments - Summary of Net Carrying Amounts of Derivative Contracts Measured Using Predominantly Unobservable Inputs (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of significant unobservable inputs used in fair value measurement of liabilities [line items] | ||
| Beginning balance | $ 4,069 | |
| Currency translation differences | (1,124) | |
| Ending balance | 471 | $ 4,069 |
| Unobservable inputs | ||
| Disclosure of significant unobservable inputs used in fair value measurement of liabilities [line items] | ||
| Beginning balance | 2,466 | 1,909 |
| Net gains recognised in revenue | (191) | 576 |
| Purchases | 310 | 271 |
| Sales | (363) | (185) |
| Settlements | 0 | (125) |
| Recategorisations (net) | (127) | 25 |
| Currency translation differences | (58) | (5) |
| Ending balance | $ 2,037 | $ 2,466 |