XML 392 R102.htm IDEA: XBRL DOCUMENT v3.25.0.1
Commitments and contingencies - Narrative (Details) - CHF (SFr)
SFr in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Gross lease liabilities SFr 331.1 SFr 385.7
Atlanta    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Bank guarantee 120.7  
Belgium    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Bank guarantee 28.2  
Gross lease liabilities 106.7 122.5
Group cash pool participants    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Gross bank balances before cash pooling offset 64.9 112.6
Contingent liability for guarantees    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Estimated financial effect of contingent liabilities 168.3 155.6
Leased locations    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Gross lease liabilities SFr 197.2 SFr 245.8