Financial risk management and financial instruments - Summary of Changes in Convertible Notes (Details) - Exchangeable Notes Due 2026 - EUR (€) € in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of detailed information about borrowings [line items] | ||
| Beginning Balance | € 1,203 | € 1,128 |
| Changes in fair value recognized in consolidated statement of operations | 240 | 97 |
| Changes in fair value recorded in other comprehensive income | 8 | 14 |
| Effect of changes in foreign exchange rates | 88 | (36) |
| Ending Balance | € 1,539 | € 1,203 |