v3.26.1
Related Party Transactions - Additional Information (Details)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Oct. 01, 2025
EUR (€)
May 30, 2025
shares
Oct. 10, 2023
shares
Jun. 30, 2026
EUR (€)
Jun. 30, 2025
EUR (€)
Jun. 30, 2026
EUR (€)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
EUR (€)
Sep. 30, 2025
EUR (€)
shares
Disclosure of transactions between related parties [line items]                  
Non-employee director cash compensation per year € 300,000                
Right of use Assets       € 221,514,000   € 221,514,000     € 179,762,000
Shares repurchased of ordinary shares | shares                 3,927,344
Payment of tax receivable agreement liability           14,627,000      
Ordinary Shares                  
Disclosure of transactions between related parties [line items]                  
Shares repurchased of ordinary shares | shares   3,927,344 5,648,465            
Shares repurchased amount of ordinary shares                 € 176,400,000
MidCo                  
Disclosure of transactions between related parties [line items]                  
Payment of tax receivable agreement liability       0 € 0 14,600,000 $ 17.3 € 0  
Ockenfels                  
Disclosure of transactions between related parties [line items]                  
Lease liability       2,700,000   2,700,000     900,000
Right of use Assets       500,000   500,000     800,000
Outstanding payables       1,800,000   1,800,000     1,800,000
Outstanding receivables       9,800,000   9,800,000     9,800,000
Restricted Share Units                  
Disclosure of transactions between related parties [line items]                  
Expenses recognized during period       100,000 100,000 300,000   300,000  
Other related parties [member]                  
Disclosure of transactions between related parties [line items]                  
Lease liability       900,000   900,000     800,000
Right of use Assets       900,000   900,000     700,000
Sales       100,000 100,000 300,000   500,000  
TRA liability       361,300,000   361,300,000     € 356,800,000
Director compensation       100,000 200,000 300,000   400,000  
Other related parties [member] | Maximum                  
Disclosure of transactions between related parties [line items]                  
Marketing expenses       0 0 100,000   100,000  
Consulting fees and cost reimbursements       100,000 € 100,000 200,000   € 300,000  
Value Retail Limited affiliated entities [Member]                  
Disclosure of transactions between related parties [line items]                  
Lease payments       500,000   1,100,000      
Lease liability       8,100,000   8,100,000      
Right of use Assets       € 7,900,000   € 7,900,000