v3.26.1
Inventories (Details) - CHF (SFr)
SFr in Millions
Jun. 30, 2026
Dec. 31, 2025
Disclosure Of Inventory [Line Items]    
Inventories SFr 472.9 SFr 419.8
Gross carrying amount | Shoes    
Disclosure Of Inventory [Line Items]    
Inventories 398.4 344.3
Gross carrying amount | Apparel    
Disclosure Of Inventory [Line Items]    
Inventories 84.9 88.1
Gross carrying amount | Accessories    
Disclosure Of Inventory [Line Items]    
Inventories 15.5 12.8
Allowances    
Disclosure Of Inventory [Line Items]    
Inventories SFr (25.9) SFr (25.5)