Assets under management (Details) - CHF (SFr)
SFr in Billions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Assets under management [Line Items]      
Assets in collective investment instruments managed by Credit Suisse SFr 231.8 SFr 215.6  
Assets with discretionary mandates 294.8 267.4  
Other assets under management 1,087.4 1,028.9  
Assets under management (including double counting) 1,614.0 1,511.9 SFr 1,507.2
of which double counting 46.2 49.1  
Bank      
Assets under management [Line Items]      
Assets in collective investment instruments managed by Credit Suisse 228.9 210.7  
Assets with discretionary mandates 294.8 267.3  
Other assets under management 1,087.3 1,029.0  
Assets under management (including double counting) 1,611.0 1,507.0 SFr 1,500.7
of which double counting SFr 45.9 SFr 48.8