XML 71 R63.htm IDEA: XBRL DOCUMENT v3.23.2
Expected credit loss measurement - CLE for the period (Detail) - USD ($)
$ in Millions
 1 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   $ 740 $ 38 $ 7 $ 778 $ 25
UBS BDs            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   16     54 25
Global Wealth Management            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   5 15 (3) 20 (10)
Personal & Corporate Banking            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   10 16 35 26 57
Asset Management            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   0 0 0 0 0
Investment Bank            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   1 7 (28) 8 (24)
Group Functions            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   0 0 2 0 $ 2
Credit Suisse BDs            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   724        
Credit Suisse BDs | US GAAP            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release) $ 101       101  
Credit Suisse BDs | Reconciliation from US GAAP to IFRS            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release) 623       $ 623  
Wealth Management            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   149        
Wealth Management | US GAAP            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release) 7          
Swiss Bank            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   224        
Swiss Bank | US GAAP            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release) 67          
Asset Management            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   1        
Asset Management | US GAAP            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release) 2          
Investment Bank            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   200        
Investment Bank | US GAAP            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release) (3)          
Capital Release Unit            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   148        
Capital Release Unit | US GAAP            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release) 28          
Corporate Center            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   2        
Corporate Center | US GAAP            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release) $ 0          
Stage 1 and 2 positions            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   644 26 16    
Stage 1 and 2 positions | UBS BDs            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   (10)        
Stage 1 and 2 positions | Global Wealth Management            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   (4) 15 (8)    
Stage 1 and 2 positions | Personal & Corporate Banking            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   (11) 15 26    
Stage 1 and 2 positions | Asset Management            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   0 0 0    
Stage 1 and 2 positions | Investment Bank            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   5 (5) (2)    
Stage 1 and 2 positions | Group Functions            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   0 0 0    
Stage 1 and 2 positions | Credit Suisse BDs            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   654        
Stage 1 and 2 positions | Wealth Management            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   143        
Stage 1 and 2 positions | Swiss Bank            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   217        
Stage 1 and 2 positions | Asset Management            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   1        
Stage 1 and 2 positions | Investment Bank            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   189        
Stage 1 and 2 positions | Capital Release Unit            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   104        
Stage 1 and 2 positions | Corporate Center            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   2        
Stage 3 positions            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   77 12 (9)    
Stage 3 positions | UBS BDs            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   26        
Stage 3 positions | Global Wealth Management            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   9 0 6    
Stage 3 positions | Personal & Corporate Banking            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   21 0 8    
Stage 3 positions | Asset Management            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   0 0 0    
Stage 3 positions | Investment Bank            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   (4) 12 (26)    
Stage 3 positions | Group Functions            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   0 $ 0 $ 2    
Stage 3 positions | Credit Suisse BDs            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   51        
Stage 3 positions | Wealth Management            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   0        
Stage 3 positions | Swiss Bank            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   7        
Stage 3 positions | Asset Management            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   0        
Stage 3 positions | Investment Bank            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   0        
Stage 3 positions | Capital Release Unit            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   44        
Stage 3 positions | Corporate Center            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   0        
Purchased credit-impaired (PCI)            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   19        
Purchased credit-impaired (PCI) | Credit Suisse BDs            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   19        
Purchased credit-impaired (PCI) | Wealth Management            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   7        
Purchased credit-impaired (PCI) | Swiss Bank            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   0        
Purchased credit-impaired (PCI) | Asset Management            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   0        
Purchased credit-impaired (PCI) | Investment Bank            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   12        
Purchased credit-impaired (PCI) | Capital Release Unit            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   0        
Purchased credit-impaired (PCI) | Corporate Center            
Disclosure Of Provision Matrix [Line Items]            
Credit loss expense / (release)   $ 0