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Cash and cash equivalents (Details) - EUR (€)
€ in Millions
Dec. 31, 2022
Dec. 31, 2021
Cash and cash equivalents    
Cash and cash equivalents € 10,155 € 8,254
Financial assets, classified as cash equivalents 6,804 5,496
Restricted cash 97 € 115
US Dollars    
Cash and cash equivalents    
Cash and cash equivalents 4,134  
Financial assets, classified as cash equivalents 2,581  
Euro    
Cash and cash equivalents    
Cash and cash equivalents 5,143  
Financial assets, classified as cash equivalents € 3,631