Joint ventures and associates - Summary of Other Arrangements in Respect of Joint Ventures and Associates (Details) - USD ($) $ in Millions |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|
| Interests In Other Entities [Abstract] | ||
| Commitments to make purchases from joint ventures and associates | $ 1,078 | $ 1,397 |
| Commitments to provide debt or equity funding to joint ventures and associates | $ 323 | $ 405 |