v3.25.2
Financial Instruments and Financial Risk Management - Schedule of Fair Value and Fair Value Hierarchy of Loans and Borrowings Carried at Amortized Cost (Details) - Level 2 - EUR (€)
€ in Thousands
Jun. 30, 2025
Sep. 30, 2024
Term Loan | EUR    
Disclosure of fair value measurement of liabilities [line items]    
Nominal value [1] € 375,000 € 375,000
Term Loan | USD    
Disclosure of fair value measurement of liabilities [line items]    
Nominal value [1] 147,896 160,772
Vendor Loan    
Disclosure of fair value measurement of liabilities [line items]    
Nominal value 217,408 208,305
Senior Notes    
Disclosure of fair value measurement of liabilities [line items]    
Nominal value 428,500 428,500
Carrying Value | Term Loan | EUR    
Disclosure of fair value measurement of liabilities [line items]    
Loans and borrowings [1] 375,031 375,905
Carrying Value | Term Loan | USD    
Disclosure of fair value measurement of liabilities [line items]    
Loans and borrowings [1] 147,843 159,870
Carrying Value | Vendor Loan    
Disclosure of fair value measurement of liabilities [line items]    
Loans and borrowings 218,996 212,121
Carrying Value | Senior Notes    
Disclosure of fair value measurement of liabilities [line items]    
Loans and borrowings 439,790 446,739
Fair Value | Term Loan | EUR    
Disclosure of fair value measurement of liabilities [line items]    
Loans and borrowings [1] 387,362 396,560
Fair Value | Term Loan | USD    
Disclosure of fair value measurement of liabilities [line items]    
Loans and borrowings [1] 155,301 169,363
Fair Value | Vendor Loan    
Disclosure of fair value measurement of liabilities [line items]    
Loans and borrowings 225,685 216,322
Fair Value | Senior Notes    
Disclosure of fair value measurement of liabilities [line items]    
Loans and borrowings € 436,059 € 449,533
[1] The New EUR Term Loan and New USD Term Loan, as defined in the Form 20-F for the year ended September 30, 2024, are referred to as the EUR Term Loan and USD Term Loan, respectively, throughout these interim condensed consolidated financial statements