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Financial Risk Management and Financial Instruments - Summary of Changes in Contingent Consideration Liability (Details) - Contingent consideration - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about financial instruments [line items]      
At January 1 € 30 € 27 € 0
Initial recognition of contingent consideration included in purchase consideration of acquisition 0 0 13
Contingent consideration payments (17) (7) 0
Non cash changes recognized in profit or loss      
Changes in fair value recognized in consolidated statement of operations 2 13 14
Effect of changes in foreign exchange rates 2 (3) 0
At December 31 € 17 € 30 € 27