Deferred compensation expense (Details)
shares in Millions
12 Months Ended
Dec. 31, 2021
CHF (SFr)
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
CHF (SFr)
shares
Dec. 31, 2019
CHF (SFr)
shares
Deferred compensation expense        
Total compensation expense relating to deferred compensation SFr 1,447,000,000   SFr 1,717,000,000 SFr 1,777,000,000
Total shares delivered        
Minimum total compensation of certain employees to whom share awards are granted 250,000 $ 250,000    
Deferred cash awards        
Deferred compensation expense        
Total compensation expense relating to deferred compensation 350,000,000   398,000,000 420,000,000
Retention Awards        
Deferred compensation expense        
Total compensation expense relating to deferred compensation 123,000,000   43,000,000 22,000,000
Compensation expense relating to deferred compensation, of which granted in current year 103,000,000      
Contingent Capital Awards (CCA)        
Deferred compensation expense        
Total compensation expense relating to deferred compensation 202,000,000   255,000,000 308,000,000
Performance shares | Performance share awards        
Deferred compensation expense        
Total compensation expense relating to deferred compensation SFr 290,000,000   SFr 448,000,000 SFr 438,000,000
Stock compensation plan        
Total shares delivered        
Total shares delivered (in shares) | shares 58.5 58.5 50.7 41.8
Stock compensation plan | Share awards        
Deferred compensation expense        
Total compensation expense relating to deferred compensation SFr 482,000,000   SFr 573,000,000 SFr 589,000,000
Bank        
Deferred compensation expense        
Total compensation expense relating to deferred compensation 1,434,000,000   1,648,000,000 1,694,000,000
Bank | Deferred cash awards        
Deferred compensation expense        
Total compensation expense relating to deferred compensation 370,000,000   378,000,000 378,000,000
Bank | Retention Awards        
Deferred compensation expense        
Total compensation expense relating to deferred compensation 123,000,000   43,000,000 22,000,000
Compensation expense relating to deferred compensation, of which granted in current year 103,000,000      
Bank | Contingent Capital Awards (CCA)        
Deferred compensation expense        
Total compensation expense relating to deferred compensation 194,000,000   245,000,000 298,000,000
Bank | Performance shares | Performance share awards        
Deferred compensation expense        
Total compensation expense relating to deferred compensation SFr 281,000,000   SFr 427,000,000 SFr 423,000,000
Bank | Stock compensation plan        
Total shares delivered        
Total shares delivered (in shares) | shares 55.7 55.7 48.3 40.1
Bank | Stock compensation plan | Share awards        
Deferred compensation expense        
Total compensation expense relating to deferred compensation SFr 466,000,000   SFr 555,000,000 SFr 573,000,000