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Investment and return - Schedule of Cash and Cash Equivalents Reconciliation to Cash Flow Statement (Details) - EUR (€)
€ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Investment And Return [Abstract]        
Cash and cash equivalents per balance sheet € 6,136 € 4,159    
Less: Bank overdrafts (180) (116)    
Add: Cash and cash equivalents included in assets held for sale 0 2    
Less: Bank overdraft included in liabilities held for sale (6) 0    
Cash and cash equivalents per cash flow statement € 5,950 € 4,045 € 4,225 € 3,387