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Long-term debt and interest and other costs - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2022
EUR (€)
Options
Dec. 31, 2021
EUR (€)
Options
Dec. 31, 2020
EUR (€)
Debt Instrument [Line Items]      
Redemption price, percentage 100.00%    
Maximum borrowing capacity € 700,000,000 € 700,000,000  
Available credit facility € 0 € 0  
Number of options for 1-year extension | Options 2 2  
Non-committed guarantee facility € 85,000,000    
Non committed guarantee provided 23,400,000    
Non committed credit facility with subsidiary 130,000,000    
Line of credit facility, maximum cash advances included in credit facility 75,000,000    
Interest expense 60,800,000 € 54,600,000 € 43,300,000
Berliner Glas      
Debt Instrument [Line Items]      
Secured long-term debt, noncurrent € 22,300,000    
Interest rate on principal amount (in percentage) 0.50%