Share capital - Summary of Issued and Fully Paid Ordinary Shares (Details) - USD ($) $ in Millions |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
||||
| Disclosure of classes of share capital [line items] | ||||||
| Repurchases of shares | $ (14,057) | [1] | $ (14,571) | $ (18,547) | ||
| Number of shares | ||||||
| Disclosure of classes of share capital [line items] | ||||||
| Beginning balance (in shares) | 6,524,109,049 | 7,003,503,393 | ||||
| Repurchases of shares (in shares) | (409,077,891) | (479,394,344) | ||||
| Ending balance (in shares) | 6,115,031,158 | 6,524,109,049 | 7,003,503,393 | |||
| Repurchases of shares | $ (34) | [1] | $ (40) | $ (57) | ||
| Number of shares | Nominal value $ million | ||||||
| Disclosure of classes of share capital [line items] | ||||||
| Beginning balance | 544 | 584 | ||||
| Repurchases of shares | (34) | (40) | ||||
| Ending balance | $ 510 | $ 544 | $ 584 | |||
| ||||||