Financial instruments - Summary of Net Carrying Amounts of Derivative Contracts Measured Using Predominantly Unobservable Inputs (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Disclosure of significant unobservable inputs used in fair value measurement of liabilities [line items] | ||
| Beginning balance | $ (2,323) | |
| Ending balance | 4,069 | $ (2,323) |
| Unobservable inputs | ||
| Disclosure of significant unobservable inputs used in fair value measurement of liabilities [line items] | ||
| Beginning balance | 1,909 | 389 |
| Net gains recognised in revenue | 576 | 1,190 |
| Purchases | 271 | 886 |
| Sales | (185) | (623) |
| Settlements | (125) | 46 |
| Recategorisations (net) | 25 | 17 |
| Currency translation differences | (5) | 4 |
| Ending balance | $ 2,466 | $ 1,909 |