v3.26.1
Business combination - Additional Information (Details)
€ in Thousands, $ in Millions
3 Months Ended 6 Months Ended
Apr. 22, 2026
EUR (€)
Apr. 22, 2026
AUD ($)
Oct. 23, 2025
EUR (€)
Mar. 31, 2026
EUR (€)
Mar. 31, 2026
AUD ($)
Mar. 31, 2026
EUR (€)
Apr. 22, 2026
AUD ($)
Disclosure of detailed information about business combination [line items]              
Gain on bargain purchase           € 12,291  
Birkenstock Australia Pty. Ltd.              
Disclosure of detailed information about business combination [line items]              
Percentage of voting equity interests acquired     100.00%        
Date of acquisition     Oct. 23, 2025        
Business combination, sales contributed     € 28,600        
Business combination, income contributed     12,300        
Business combination, additional sales           4,300  
Business combination, additional income           300  
Purchase price       € 13,800 $ 24.5    
Gain on bargain purchase           € 12,300  
Description of line item in statement of comprehensive income in which gain in bargain purchase transaction is recognised           Other income, net  
Pre-existing trade payables identified related to acquisition     € 21,200        
Acquisition related costs           € 400  
Acquisition costs incurred           € 200  
Birkenstock Australia Pty. Ltd. | Tranches Two | Events After Reporting Period              
Disclosure of detailed information about business combination [line items]              
Purchase price amount expected to be paid € 7,600 $ 12.5          
Escrow Deposits € 1,800           $ 3.0