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Financial Risk Management and Financial Instruments - Summary of Changes in Convertible Notes (Details) - Exchangeable Notes Due 2026
€ in Millions
12 Months Ended
Dec. 31, 2021
EUR (€)
Disclosure of detailed information about borrowings [line items]  
Beginning Balance € 0
Initial recognition 1,232
Changes in fair value recognized in consolidated statement of operations (112)
Effect of changes in foreign exchange rates 82
Ending Balance € 1,202