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Financial risk management - Maximum credit risk (Details) - Credit risk - EUR (€)
€ in Millions
Dec. 31, 2019
Dec. 31, 2018
Risk management    
Total credit risk € 579 € 499
Loan commitments given undrawn    
Risk management    
Total credit risk 303 313
Customer financing related loan receivables    
Risk management    
Total credit risk € 276 € 186