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Commissions and fees (Details) - CHF (SFr)
SFr in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Commissions and fees      
Commissions and fees SFr 5,356 SFr 8,861 SFr 13,180
Lending business      
Commissions and fees      
Commissions and fees 663 1,431 1,870
Investment and portfolio management      
Commissions and fees      
Commissions and fees 2,478 3,028 3,401
Other securities business      
Commissions and fees      
Commissions and fees 67 61 59
Fiduciary business      
Commissions and fees      
Commissions and fees 2,545 3,089 3,460
Underwriting      
Commissions and fees      
Commissions and fees 90 560 2,560
Brokerage      
Commissions and fees      
Commissions and fees 1,281 2,265 3,088
Underwriting and brokerage      
Commissions and fees      
Commissions and fees 1,371 2,825 5,648
Other services      
Commissions and fees      
Commissions and fees SFr 777 SFr 1,516 SFr 2,202