Assets under management - Change (Details 2) - CHF (SFr)
SFr in Billions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Changes in Assets under management    
Assets under management at beginning of period SFr 1,511.9 SFr 1,507.2
Net new assets/(net asset outflows) 30.9 42.0
Market movements, interest, dividends and foreign exchange 92.6 (14.7)
of which market movements, interest and dividends 80.8 53.4
of which foreign exchange 11.8 (68.1)
Other effects (21.4) (22.6)
Assets under management at end of period 1,614.0 1,511.9
Bank    
Changes in Assets under management    
Assets under management at beginning of period 1,507.0 1,500.7
Net new assets/(net asset outflows) 33.2 43.4
Market movements, interest, dividends and foreign exchange 92.4 (14.5)
of which market movements, interest and dividends 80.7 53.2
of which foreign exchange 11.7 (67.7)
Other effects (21.6) (22.6)
Assets under management at end of period SFr 1,611.0 SFr 1,507.0