Shareholders' equity and share-based payments - Paid-in surplus and Reserves (Details) € in Millions, $ in Millions |
Dec. 31, 2025
EUR (€)
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
EUR (€)
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
EUR (€)
|
Dec. 31, 2023
USD ($)
|
|---|---|---|---|---|---|---|
| Shareholders' equity and share-based payments | ||||||
| Paid-in surplus | € | € 12,253 | € 23,345 | € 24,385 | |||
| Reserves | ||||||
| Percentage of net income that must be transferred to legal reserve | 5.00% | 5.00% | ||||
| Required legal reserve as a percentage of share capital | 10.00% | 10.00% | ||||
| Additional corporation tax if unrestricted reserves were wholly distributed | $ | $ 293 | $ 234 | $ 234 |