Other assets and other liabilities (Details 2) - CHF (SFr)
SFr in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Premises and equipment      
Buildings and improvements SFr 1,107 SFr 1,425  
Land 241 291  
Leasehold improvements 1,722 1,775  
Software 8,146 7,038  
Equipment 1,806 1,874  
Premises and equipment 13,022 12,403  
Accumulated depreciation (8,129) (7,627)  
Total premises and equipment, net 4,893 4,776  
Depreciation and impairment      
Depreciation 1,020 964 SFr 939
Impairment 21 10 3
Amortization and impairment on right-of-use assets 361 331 324
Right-of-use assets [Abstract]      
Right-of-use assets 2,412 2,600  
Premises, equipment and right-of-use assets 7,305 7,376  
Bank      
Premises and equipment      
Buildings and improvements 1,084 1,403  
Land 241 291  
Leasehold improvements 1,578 1,634  
Software 7,660 6,663  
Equipment 1,004 1,128  
Premises and equipment 11,567 11,119  
Accumulated depreciation (7,143) (6,761)  
Total premises and equipment, net 4,424 4,358  
Depreciation and impairment      
Depreciation 903 860 844
Impairment 20 10 3
Amortization and impairment on right-of-use assets 313 284 SFr 279
Right-of-use assets [Abstract]      
Operating leases 1,716 1,855  
Right-of-use assets 1,716 1,855  
Premises, equipment and right-of-use assets SFr 6,140 SFr 6,213