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Related parties - Schedule of Transactions (Details)
SFr in Millions
12 Months Ended
Dec. 31, 2022
CHF (SFr)
executiveMember
Dec. 31, 2021
CHF (SFr)
Dec. 31, 2020
CHF (SFr)
Related party transactions [abstract]      
Number of executive members | executiveMember 5    
Short-term employee benefits SFr 2.1 SFr 1.9 SFr 1.8
Post-employment benefits 1.8 14.4 2.1
Share-based compensation 15.1 67.3 10.0
On Executive Team SFr 19.0 SFr 83.6 SFr 13.9