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Financial Risk Management and Financial Instruments - Summary of Liquidity Position in Terms of Available Cash and Cash Equivalents and Short Term Investments (Details) - EUR (€)
€ in Millions
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Liquidity Risk [Line Items]    
Short term investments € 756 € 596
Liquidity Position    
Disclosure Of Liquidity Risk [Line Items]    
Short term investments 756 596
Cash equivalents 1,970 685
Cash at bank and on hand 774 466
Liquidity position € 3,500 € 1,747