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Financial assets and financial liabilities (Details) - EUR (€)
3 Months Ended 6 Months Ended
Mar. 31, 2022
Jun. 30, 2022
Financial assets and financial liabilities    
Transfer from Level 1 to Level 2, Assets € 0 € 0
Transfer from Level 2 to Level 1, Assets 0 0
Transfer from Level 1 to Level 2, Liabilities 0 0
Transfer from Level 2 to Level 1, Liabilities 0 0
Transfers into Level 3, Assets 0 0
Transfers out of Level 3, Assets 0 0
Transfers into Level 3, Liabilities 0 0
Transfers out of Level 3, Liabilities € 0 € 0