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Revenue from Contracts with Customers - Summary of Contract Balances (Details) - EUR (€)
€ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]    
Trade receivables € 165,468 € 11,913
Contract liabilities € 371,475 € 190,692