v3.19.3.a.u2
Leases - Additional Information (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2019
Jan. 01, 2019
Disclosure Of Leases [Abstract]    
Weighted average incremental borrowing rate applied to lease liabilities   6.70%
Expenses relating to short-term leases € 14  
Weighted average incremental borrowing rate applied to lease liabilities 6.40%