CECL (Details 15)
12 Months Ended
Dec. 31, 2021
year
Dec. 31, 2020
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Number of Macroeconomic Scenarios 3  
Reasonable Supportable Forecast Period Macroeconomic Factors, Years 5  
Scenario, Macroeconomic scenario, Downside [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Macroeconomic Scenario Probability, in percent 40.00% 40.00%
Scenario, Macroeconomic scenario, Downside, Forecast, One year [Member] | Real GDP growth rate (%YoY) [Member] | Eurozone [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent (0.70%) 0.30%
Scenario, Macroeconomic scenario, Downside, Forecast, One year [Member] | Real GDP growth rate (%YoY) [Member] | SWITZERLAND [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent (0.40%) 0.10%
Scenario, Macroeconomic scenario, Downside, Forecast, One year [Member] | Real GDP growth rate (%YoY) [Member] | UNITED STATES [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 0.10% 0.50%
Scenario, Macroeconomic scenario, Downside, Forecast, One year [Member] | Real GDP growth rate (%YoY) [Member] | UNITED KINGDOM [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent (0.90%) 1.50%
Scenario, Macroeconomic scenario, Downside, Forecast, One year [Member] | Industrial production (%YoY) [Member] | World [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 0.00% 2.40%
Scenario, Macroeconomic scenario, Downside, Forecast, Two years [Member] | Real GDP growth rate (%YoY) [Member] | Eurozone [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 1.40% 2.80%
Scenario, Macroeconomic scenario, Downside, Forecast, Two years [Member] | Real GDP growth rate (%YoY) [Member] | SWITZERLAND [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 0.30% 0.80%
Scenario, Macroeconomic scenario, Downside, Forecast, Two years [Member] | Real GDP growth rate (%YoY) [Member] | UNITED STATES [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 1.40% 2.00%
Scenario, Macroeconomic scenario, Downside, Forecast, Two years [Member] | Real GDP growth rate (%YoY) [Member] | UNITED KINGDOM [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 1.00% 2.20%
Scenario, Macroeconomic scenario, Downside, Forecast, Two years [Member] | Industrial production (%YoY) [Member] | World [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 2.00% 2.90%
Scenario, Macroeconomic scenario, Baseline [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Macroeconomic Scenario Probability, in percent 50.00% 50.00%
Scenario, Macroeconomic scenario, Baseline, Forecast, One year [Member] | Real GDP growth rate (%YoY) [Member] | Eurozone [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 3.80% 4.60%
Scenario, Macroeconomic scenario, Baseline, Forecast, One year [Member] | Real GDP growth rate (%YoY) [Member] | SWITZERLAND [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 2.50% 3.60%
Scenario, Macroeconomic scenario, Baseline, Forecast, One year [Member] | Real GDP growth rate (%YoY) [Member] | UNITED STATES [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 3.80% 3.60%
Scenario, Macroeconomic scenario, Baseline, Forecast, One year [Member] | Real GDP growth rate (%YoY) [Member] | UNITED KINGDOM [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 5.00% 6.40%
Scenario, Macroeconomic scenario, Baseline, Forecast, One year [Member] | Industrial production (%YoY) [Member] | World [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 3.00% 5.50%
Scenario, Macroeconomic scenario, Baseline, Forecast, Two years [Member] | Real GDP growth rate (%YoY) [Member] | Eurozone [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 2.30% 3.20%
Scenario, Macroeconomic scenario, Baseline, Forecast, Two years [Member] | Real GDP growth rate (%YoY) [Member] | SWITZERLAND [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 1.90% 2.80%
Scenario, Macroeconomic scenario, Baseline, Forecast, Two years [Member] | Real GDP growth rate (%YoY) [Member] | UNITED STATES [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 1.90% 4.10%
Scenario, Macroeconomic scenario, Baseline, Forecast, Two years [Member] | Real GDP growth rate (%YoY) [Member] | UNITED KINGDOM [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 3.30% 4.00%
Scenario, Macroeconomic scenario, Baseline, Forecast, Two years [Member] | Industrial production (%YoY) [Member] | World [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 3.00% 4.30%
Scenario, Macroeconomic scenario, Upside [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Macroeconomic Scenario Probability, in percent 10.00% 10.00%
Scenario, Macroeconomic scenario, Upside, Forecast, One year [Member] | Real GDP growth rate (%YoY) [Member] | Eurozone [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 4.20% 7.80%
Scenario, Macroeconomic scenario, Upside, Forecast, One year [Member] | Real GDP growth rate (%YoY) [Member] | SWITZERLAND [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 4.30% 5.40%
Scenario, Macroeconomic scenario, Upside, Forecast, One year [Member] | Real GDP growth rate (%YoY) [Member] | UNITED STATES [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 4.50% 5.20%
Scenario, Macroeconomic scenario, Upside, Forecast, One year [Member] | Real GDP growth rate (%YoY) [Member] | UNITED KINGDOM [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 7.80% 10.90%
Scenario, Macroeconomic scenario, Upside, Forecast, One year [Member] | Industrial production (%YoY) [Member] | World [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 4.40% 8.60%
Scenario, Macroeconomic scenario, Upside, Forecast, Two years [Member] | Real GDP growth rate (%YoY) [Member] | Eurozone [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 2.70% 3.90%
Scenario, Macroeconomic scenario, Upside, Forecast, Two years [Member] | Real GDP growth rate (%YoY) [Member] | SWITZERLAND [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 2.80% 4.50%
Scenario, Macroeconomic scenario, Upside, Forecast, Two years [Member] | Real GDP growth rate (%YoY) [Member] | UNITED STATES [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 2.40% 5.10%
Scenario, Macroeconomic scenario, Upside, Forecast, Two years [Member] | Real GDP growth rate (%YoY) [Member] | UNITED KINGDOM [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 3.90% 5.70%
Scenario, Macroeconomic scenario, Upside, Forecast, Two years [Member] | Industrial production (%YoY) [Member] | World [Member]    
Allowance for Credit Loss, Macroeconomic scenarios [Line Items]    
Allowance for Credit Losses, Macroeconomic Forecast, in percent 3.70% 5.90%