Trading assets and liabilities - Cash collateral - netted (Details 2) - CHF (SFr)
SFr in Millions
Dec. 31, 2021
Dec. 31, 2020
Cash collateral - netted    
Cash collateral paid SFr 17,869 SFr 26,815
Cash collateral received 12,056 16,795
Cash collateral - not netted    
Cash collateral paid 7,659 7,741
Cash collateral received 5,533 7,831
Bank    
Cash collateral - netted    
Cash collateral paid 17,869 26,885
Cash collateral received 12,056 16,795
Cash collateral - not netted    
Cash collateral paid 7,659 7,741
Cash collateral received SFr 5,533 SFr 7,831