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Pensions - Schedule of Changes to Defined Benefit Obligation (Details) - Final Salary Defined Benefit Pension Plan
€ in Thousands
12 Months Ended
Dec. 31, 2020
EUR (€)
Disclosure Of Defined Benefit Plans [Line Items]  
Acquisition of subsidiaries and businesses € (4,029)
Service cost (24)
Net interest expense (6)
Benefits paid 4
Actuarial changes arising from changes in financial assumptions (227)
Experience adjustments 17
As of December 31, 2020 € (4,265)