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Trading assets and liabilities - Cash collateral - netted (Details 2) - CHF (SFr)
SFr in Millions
Dec. 31, 2023
Dec. 31, 2022
Cash collateral - netted    
Cash collateral paid SFr 7,909 SFr 11,924
Cash collateral - not netted    
Cash collateral paid 6,718 7,723
Cash collateral received SFr 677 SFr 2,079