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Commissions and fees (Details) - CHF (SFr)
SFr in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Commissions and fees      
Commissions and fees SFr 8,853 SFr 13,165 SFr 11,853
Lending business      
Commissions and fees      
Commissions and fees 1,438 1,877 1,631
Investment and portfolio management      
Commissions and fees      
Commissions and fees 3,079 3,497 3,187
Other securities business      
Commissions and fees      
Commissions and fees 61 56 66
Fiduciary business      
Commissions and fees      
Commissions and fees 3,140 3,553 3,253
Underwriting      
Commissions and fees      
Commissions and fees 491 2,493 2,255
Brokerage      
Commissions and fees      
Commissions and fees 2,265 3,069 3,244
Underwriting and brokerage      
Commissions and fees      
Commissions and fees 2,756 5,562 5,499
Other services      
Commissions and fees      
Commissions and fees 1,519 2,173 1,470
Bank      
Commissions and fees      
Commissions and fees 8,861 13,180 11,850
Bank | Lending business      
Commissions and fees      
Commissions and fees 1,431 1,870 1,612
Bank | Investment and portfolio management      
Commissions and fees      
Commissions and fees 3,028 3,401 3,087
Bank | Other securities business      
Commissions and fees      
Commissions and fees 61 59 73
Bank | Fiduciary business      
Commissions and fees      
Commissions and fees 3,089 3,460 3,160
Bank | Underwriting      
Commissions and fees      
Commissions and fees 560 2,560 2,348
Bank | Brokerage      
Commissions and fees      
Commissions and fees 2,265 3,088 3,246
Bank | Underwriting and brokerage      
Commissions and fees      
Commissions and fees 2,825 5,648 5,594
Bank | Other services      
Commissions and fees      
Commissions and fees SFr 1,516 SFr 2,202 SFr 1,484