v3.26.1
Financial Instruments - Interest bearing loans and borrowings (Details)
€ in Millions, $ in Millions
2 Months Ended 6 Months Ended 84 Months Ended
Nov. 10, 2025
EUR (€)
Dec. 31, 2025
EUR (€)
Jun. 30, 2026
EUR (€)
Jun. 30, 2026
USD ($)
Nov. 10, 2032
EUR (€)
Jul. 30, 2026
EUR (€)
Jun. 30, 2026
USD ($)
Nov. 10, 2025
USD ($)
Disclosure Of Financial Assets And Liabilities [Table] [Line Items]                
Discount on issuance of debt € 3.5              
Borrowing costs capitalised         € 1.2      
Loans and borrowings   € 2,258.6 € 2,278.3          
Net loss on refinancing € 75.9              
Financial assets at fair value through profit or loss, category [member]                
Disclosure Of Financial Assets And Liabilities [Table] [Line Items]                
Non-cash loss recognized in relation to cross currency interest rate swaps   € 5.6            
Twenty Twenty-Eight Fixed Rate Senior Secured Notes                
Disclosure Of Financial Assets And Liabilities [Table] [Line Items]                
Interest rate     2.50%     5.25% 2.50%  
Twenty Twenty-Eight Fixed Rate Senior Secured Notes | Gross carrying amount [member]                
Disclosure Of Financial Assets And Liabilities [Table] [Line Items]                
Loans and borrowings     € 800.0     € 800.0    
Senior USD Debt                
Disclosure Of Financial Assets And Liabilities [Table] [Line Items]                
Notional amount     542.8       $ 620.0 $ 679.1
Interest rate 2.50%             2.50%
Repayments of non-current borrowings     € 5.4 $ 6.2        
Repayments Of Non-current Borrowings - percentage of original issued notional     100.00%       100.00%  
Senior EURO Debt                
Disclosure Of Financial Assets And Liabilities [Table] [Line Items]                
Notional amount € 553.2              
Interest rate 2.50%             2.50%
Senior Eur Debt                
Disclosure Of Financial Assets And Liabilities [Table] [Line Items]                
Notional amount     € 880.0          
Interest rate     2.50%       2.50%  
Senior EUR Debt                
Disclosure Of Financial Assets And Liabilities [Table] [Line Items]                
Notional amount € 130.0   € 880.0          
Interest rate   2.75%            
Loans and Borrowings                
Disclosure Of Financial Assets And Liabilities [Table] [Line Items]                
Fair value   € 2,201.1 2,169.4          
Carrying value   2,201.9 2,217.4          
Loans and Borrowings | Deferred borrowing costs                
Disclosure Of Financial Assets And Liabilities [Table] [Line Items]                
Fair value   0.0 0.0          
Carrying value   (6.2) (5.5)          
Loans and Borrowings | Senior EUR/USD loans                
Disclosure Of Financial Assets And Liabilities [Table] [Line Items]                
Carrying value   1,408.0 1,422.8          
Loans and Borrowings | Senior EUR/USD loans | Level 2                
Disclosure Of Financial Assets And Liabilities [Table] [Line Items]                
Fair value   1,417.0 1,398.8          
Loans and Borrowings | Other borrowings [Domain]                
Disclosure Of Financial Assets And Liabilities [Table] [Line Items]                
Fair value   0.1 0.1          
Carrying value   0.1 0.1          
Loans and Borrowings | Twenty Twenty-Eight Fixed Rate Senior Secured Notes                
Disclosure Of Financial Assets And Liabilities [Table] [Line Items]                
Carrying value   800.0 800.0          
Loans and Borrowings | Twenty Twenty-Eight Fixed Rate Senior Secured Notes | Level 1                
Disclosure Of Financial Assets And Liabilities [Table] [Line Items]                
Fair value   € 784.0 € 770.5