Directors and senior management - Summary of Remuneration of Directors of the Company (Details) - Directors - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Disclosure Of Directors Remuneration [Line Items] | |||
| Emoluments | $ 12 | $ 12 | $ 12 |
| Value of released awards under long-term incentive plans | 4 | 7 | 5 |
| Employer contributions to pension plans | $ 1 | $ 1 | $ 1 |