Shareholders' equity and share-based payments - Number of shares (Details) € / shares in Units, $ in Millions |
Dec. 31, 2025
USD ($)
shareholder
shares
|
Dec. 31, 2025
EUR (€)
shareholder
€ / shares
shares
|
Dec. 31, 2024
USD ($)
shares
|
Dec. 31, 2023
USD ($)
shares
|
|---|---|---|---|---|
| Shareholders' equity | ||||
| Share capital | $ 7,059 | € 5,516,463,857.5 | $ 7,577 | $ 7,616 |
| Number of shares issued | 2,206,585,543 | 2,206,585,543 | ||
| Common share par value (in Euros per shares) | € / shares | € 2.5 | |||
| Number of categories of shares | shareholder | 1 | 1 | ||
| Authorized share capital (in shares) | 3,229,286,115 | 3,229,286,115 | 3,421,656,457 | 3,436,374,353 |
| Common shares | ||||
| Shareholders' equity | ||||
| Shareholder maximum voting rights (as a percent) | 10.00% | 10.00% | ||
| Minimum ownership percentage for which voting restrictions do not apply | 66.67% | 66.67% |