v3.25.4
LEASING - Summary of Lease Liability Maturity (Details) - CHF (SFr)
SFr in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of maturity analysis of operating lease payments [line items]    
Total payments SFr 1,659.4 SFr 1,667.1
Less: present value discount (382.2) (447.8)
Present value of lease payments 1,277.2 1,219.3
Current portion 181.4 164.1
Non-current portion 1,095.8 1,055.2
Within 1 year    
Disclosure of maturity analysis of operating lease payments [line items]    
Total payments 181.4 164.1
Between 1 and 2 years    
Disclosure of maturity analysis of operating lease payments [line items]    
Total payments 178.3 152.0
Between 2 and 3 years    
Disclosure of maturity analysis of operating lease payments [line items]    
Total payments 151.6 148.8
Between 3 and 4 years    
Disclosure of maturity analysis of operating lease payments [line items]    
Total payments 144.9 141.3
Between 4 and 5 years    
Disclosure of maturity analysis of operating lease payments [line items]    
Total payments 139.3 135.2
After 5 years    
Disclosure of maturity analysis of operating lease payments [line items]    
Total payments SFr 863.9 SFr 925.7