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Purchase Obligations - Maturity (Details) - EUR (€)
€ in Millions
Dec. 31, 2019
Dec. 31, 2018
Purchase Obligations    
Purchase Obligation € 2,592 € 2,133
2020    
Purchase Obligations    
Purchase Obligation 1,251  
Due 2021 to 2024    
Purchase Obligations    
Purchase Obligation 1,298  
Due thereafter    
Purchase Obligations    
Purchase Obligation € 43