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Inventories - Schedule of Inventory (Details) - CHF (SFr)
SFr in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Inventory [Line Items]    
Inventories SFr 419.2 SFr 356.5
Gross Carrying Amount | Shoes    
Disclosure Of Inventory [Line Items]    
Inventories 371.7 321.4
Gross Carrying Amount | Apparel    
Disclosure Of Inventory [Line Items]    
Inventories 65.8 34.5
Gross Carrying Amount | Accessories    
Disclosure Of Inventory [Line Items]    
Inventories 12.5 8.0
Expected credit loss    
Disclosure Of Inventory [Line Items]    
Inventories SFr (30.8) SFr (7.4)