v3.26.1
Provisions (Details) - CHF (SFr)
SFr in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Disclosure of Provisions [Line Items]        
Beginning balance SFr 33.7 SFr 36.6    
Additions 15.0 10.4    
Release (3.0) (5.0)    
Utilization (6.3) (6.6)    
Exchange differences 0.2 (1.2)    
Ending balance 39.6 34.3    
thereof current 12.0 16.9 SFr 13.0 SFr 21.7
thereof non-current 27.6 17.4 20.7 14.9
Social charges        
Disclosure of Provisions [Line Items]        
Beginning balance 10.7 20.3    
Additions 6.9 4.4    
Release (2.7) (2.5)    
Utilization (6.3) (6.6)    
Exchange differences 0.1 (0.4)    
Ending balance 8.7 15.1    
thereof current 8.7 15.1 10.7 20.3
thereof non-current 0.0 0.0 0.0 0.0
Long-service leave        
Disclosure of Provisions [Line Items]        
Beginning balance 11.5 8.0    
Additions 2.5 2.6    
Release (0.2) (0.2)    
Utilization 0.0 0.0    
Exchange differences 0.1 (0.4)    
Ending balance 13.8 10.0    
thereof current 2.5 1.2 1.8 1.0
thereof non-current 11.3 8.8 9.7 7.0
Other        
Disclosure of Provisions [Line Items]        
Beginning balance 11.6 8.4    
Additions 5.6 3.4    
Release (0.2) (2.2)    
Utilization 0.0 0.0    
Exchange differences 0.1 (0.4)    
Ending balance 17.0 9.2    
thereof current 0.7 0.6 0.6 0.4
thereof non-current SFr 16.3 SFr 8.6 SFr 11.0 SFr 8.0