Other investments (Details 2) - CHF (SFr)
SFr in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Other investments      
Impairments and downward adjustments SFr (42)    
Impairments and downward adjustments, Annual Amount (17) SFr (17)  
Upward adjustments 138    
Upward adjustments, Annual Amount 1 137  
Other Revenue, Other Investments 253 769 SFr 1,141
Bank      
Other investments      
Impairments and downward adjustments (42)    
Impairments and downward adjustments, Annual Amount (17) (17)  
Upward adjustments 138    
Upward adjustments, Annual Amount 1 137  
Other Revenue, Other Investments SFr 256 SFr 769 SFr 1,142