v3.26.3
Financial Instruments - Additional Information (Details)
$ in Millions
3 Months Ended 9 Months Ended
Nov. 10, 2025
EUR (€)
Sep. 30, 2026
EUR (€)
Sep. 30, 2025
EUR (€)
Sep. 30, 2026
EUR (€)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
EUR (€)
Sep. 30, 2026
USD ($)
Jul. 30, 2026
EUR (€)
Dec. 31, 2025
EUR (€)
Nov. 10, 2025
USD ($)
Disclosure of detailed information about borrowings [line items]                    
Contract liabilities   € 151,900,000   € 151,900,000         € 192,100,000  
Line of credit facility, maximum borrowing capacity € 175,000,000.0                  
Financing costs incurred on new or amended debt (b)   (7,600,000) € 0 (7,600,000)   € 0        
Gains (Losses) on Restructuring of previous debt       23,800,000            
Borrowing costs recognised as expense 25,100,000                  
Increase in RCF facility               € 105,000,000.0    
Liability relating to IFRS 16                    
Disclosure of detailed information about borrowings [line items]                    
Lease liabilities   95,800,000   95,800,000         € 89,300,000  
Senior EURO Debt                    
Disclosure of detailed information about borrowings [line items]                    
Notional amount € 553,200,000                  
Interest rate 2.50%                 2.50%
Senior USD Debt                    
Disclosure of detailed information about borrowings [line items]                    
Notional amount   € 547,200,000   547,200,000     $ 620.0     $ 679.1
Repayments of non-current borrowings       € 5,500,000 $ 6.2          
Interest rate 2.50%                 2.50%
Twenty Twenty-Eight Fixed Rate Senior Secured Notes                    
Disclosure of detailed information about borrowings [line items]                    
Interest rate   5.25%   5.25%     5.25%      
Senior EUR Debt                    
Disclosure of detailed information about borrowings [line items]                    
Notional amount € 130,000,000.0 € 880,000,000.0   € 880,000,000.0            
Interest rate                 2.75%  
Revolving Credit Facility                    
Disclosure of detailed information about borrowings [line items]                    
Line of credit facility, maximum borrowing capacity   280,000,000.0   280,000,000.0            
Revolving Credit Facility - Cash Drawings                    
Disclosure of detailed information about borrowings [line items]                    
Line of Credit Facility, Maximum Borrowings CASH   270   270            
Revolving Credit Facility - ancillary facilities                    
Disclosure of detailed information about borrowings [line items]                    
Line of Credit Facility, Maximum Facility NonCash   10   10            
Utilisation of Revolving Credit Facility                    
Disclosure of detailed information about borrowings [line items]                    
Line of Credit Facility, Maximum Facility NonCash   € 2.9   € 2.9            
2033 Fixed Rate Senior Secured Notes                    
Disclosure of detailed information about borrowings [line items]                    
Interest rate               5.25%