Expected credit loss measurement - ECL selection of key macro-economic variables (Detail)	12 Months Ended
	Dec. 31, 2019
Upside ECL scenario | Within 1 year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.20%
Upside ECL scenario | Within 1 year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.30%
Upside ECL scenario | Within 1 year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	3.60%
Upside ECL scenario | Within 1 year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.50%
Upside ECL scenario | Within 1 year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	3.10%
Upside ECL scenario | Within 1 year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.10%
Upside ECL scenario | Within 1 year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.30%)
Upside ECL scenario | Within 1 year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.90%)
Upside ECL scenario | Within 1 year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.40%)
Upside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.61%
Upside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.65%
Upside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.73%
Upside ECL scenario | Within 1 year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	14.80%
Upside ECL scenario | Within 1 year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	17.00%
Upside ECL scenario | Within 1 year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	13.90%
Upside ECL scenario | Within 1 year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.50%
Upside ECL scenario | Within 1 year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	6.20%
Upside ECL scenario | Within 1 year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.90%
Upside ECL scenario | cumulative 3-year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	10.40%
Upside ECL scenario | cumulative 3-year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	10.90%
Upside ECL scenario | cumulative 3-year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	9.50%
Upside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	5.50%
Upside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	8.60%
Upside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	6.70%
Upside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.80%)
Upside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.90%)
Upside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.90%)
Upside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.741%
Upside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.217%
Upside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.83%
Upside ECL scenario | cumulative 3-year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	42.70%
Upside ECL scenario | cumulative 3-year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	44.30%
Upside ECL scenario | cumulative 3-year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	42.20%
Upside ECL scenario | cumulative 3-year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	14.10%
Upside ECL scenario | cumulative 3-year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	17.70%
Upside ECL scenario | cumulative 3-year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	15.40%
Baseline ECL scenario | Within 1 year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.50%
Baseline ECL scenario | Within 1 year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.90%
Baseline ECL scenario | Within 1 year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.00%
Baseline ECL scenario | Within 1 year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.80%
Baseline ECL scenario | Within 1 year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.80%
Baseline ECL scenario | Within 1 year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.30%
Baseline ECL scenario | Within 1 year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.10%
Baseline ECL scenario | Within 1 year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.40%)
Baseline ECL scenario | Within 1 year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.10%)
Baseline ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.002%
Baseline ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.084%
Baseline ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.095%
Baseline ECL scenario | Within 1 year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	3.50%
Baseline ECL scenario | Within 1 year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.50%
Baseline ECL scenario | Within 1 year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.40%
Baseline ECL scenario | Within 1 year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.10%
Baseline ECL scenario | Within 1 year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.00%
Baseline ECL scenario | Within 1 year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.20%
Baseline ECL scenario | cumulative 3-year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.80%
Baseline ECL scenario | cumulative 3-year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	6.40%
Baseline ECL scenario | cumulative 3-year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.80%
Baseline ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.70%
Baseline ECL scenario | cumulative 3-year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	6.20%
Baseline ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.30%
Baseline ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.30%
Baseline ECL scenario | cumulative 3-year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.50%)
Baseline ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.20%)
Baseline ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.101%
Baseline ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.282%
Baseline ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.30%
Baseline ECL scenario | cumulative 3-year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	9.50%
Baseline ECL scenario | cumulative 3-year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.40%
Baseline ECL scenario | cumulative 3-year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	5.30%
Baseline ECL scenario | cumulative 3-year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.30%
Baseline ECL scenario | cumulative 3-year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	16.70%
Baseline ECL scenario | cumulative 3-year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.20%
Mild downside ECL scenario | Within 1 year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.80%)
Mild downside ECL scenario | Within 1 year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.50%)
Mild downside ECL scenario | Within 1 year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.30%)
Mild downside ECL scenario | Within 1 year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.80%
Mild downside ECL scenario | Within 1 year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.90%
Mild downside ECL scenario | Within 1 year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.80%
Mild downside ECL scenario | Within 1 year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.50%
Mild downside ECL scenario | Within 1 year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.30%
Mild downside ECL scenario | Within 1 year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.60%
Mild downside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.875%
Mild downside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.125%
Mild downside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.875%
Mild downside ECL scenario | Within 1 year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(20.30%)
Mild downside ECL scenario | Within 1 year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(15.50%)
Mild downside ECL scenario | Within 1 year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(19.00%)
Mild downside ECL scenario | Within 1 year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(7.30%)
Mild downside ECL scenario | Within 1 year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(4.00%)
Mild downside ECL scenario | Within 1 year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.20%)
Mild downside ECL scenario | cumulative 3-year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.10%)
Mild downside ECL scenario | cumulative 3-year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.00%
Mild downside ECL scenario | cumulative 3-year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.70%
Mild downside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.20%
Mild downside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	11.10%
Mild downside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	6.20%
Mild downside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.20%
Mild downside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.70%
Mild downside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.00%
Mild downside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.625%
Mild downside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.25%
Mild downside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.625%
Mild downside ECL scenario | cumulative 3-year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(23.50%)
Mild downside ECL scenario | cumulative 3-year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(14.70%)
Mild downside ECL scenario | cumulative 3-year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(24.00%)
Mild downside ECL scenario | cumulative 3-year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(15.80%)
Mild downside ECL scenario | cumulative 3-year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(11.90%)
Mild downside ECL scenario | cumulative 3-year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(6.80%)
Severe downside ECL scenario | Within 1 year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(7.00%)
Severe downside ECL scenario | Within 1 year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(6.40%)
Severe downside ECL scenario | Within 1 year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(9.10%)
Severe downside ECL scenario | Within 1 year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.80%)
Severe downside ECL scenario | Within 1 year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.20%)
Severe downside ECL scenario | Within 1 year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.30%)
Severe downside ECL scenario | Within 1 year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.60%
Severe downside ECL scenario | Within 1 year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	5.70%
Severe downside ECL scenario | Within 1 year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	5.60%
Severe downside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.00%)
Severe downside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.30%)
Severe downside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.70%)
Severe downside ECL scenario | Within 1 year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(53.00%)
Severe downside ECL scenario | Within 1 year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(60.00%)
Severe downside ECL scenario | Within 1 year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(56.20%)
Severe downside ECL scenario | Within 1 year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(15.20%)
Severe downside ECL scenario | Within 1 year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(13.30%)
Severe downside ECL scenario | Within 1 year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(23.00%)
Severe downside ECL scenario | cumulative 3-year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(6.20%)
Severe downside ECL scenario | cumulative 3-year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(4.30%)
Severe downside ECL scenario | cumulative 3-year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(10.80%)
Severe downside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.60%)
Severe downside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.40%
Severe downside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.70%)
Severe downside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	3.60%
Severe downside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	5.60%
Severe downside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	7.90%
Severe downside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.75%)
Severe downside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.20%)
Severe downside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.35%)
Severe downside ECL scenario | cumulative 3-year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(42.90%)
Severe downside ECL scenario | cumulative 3-year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(52.90%)
Severe downside ECL scenario | cumulative 3-year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(46.80%)
Severe downside ECL scenario | cumulative 3-year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(27.00%)
Severe downside ECL scenario | cumulative 3-year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(23.40%)
Severe downside ECL scenario | cumulative 3-year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(33.20%)
UBS AG | Upside ECL scenario | Within 1 year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.20%
UBS AG | Upside ECL scenario | Within 1 year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.30%
UBS AG | Upside ECL scenario | Within 1 year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	3.60%
UBS AG | Upside ECL scenario | Within 1 year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.50%
UBS AG | Upside ECL scenario | Within 1 year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	3.10%
UBS AG | Upside ECL scenario | Within 1 year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.10%
UBS AG | Upside ECL scenario | Within 1 year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.30%)
UBS AG | Upside ECL scenario | Within 1 year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.90%)
UBS AG | Upside ECL scenario | Within 1 year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.40%)
UBS AG | Upside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.61%
UBS AG | Upside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.65%
UBS AG | Upside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.73%
UBS AG | Upside ECL scenario | Within 1 year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	14.80%
UBS AG | Upside ECL scenario | Within 1 year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	17.00%
UBS AG | Upside ECL scenario | Within 1 year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	13.90%
UBS AG | Upside ECL scenario | Within 1 year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.50%
UBS AG | Upside ECL scenario | Within 1 year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	6.20%
UBS AG | Upside ECL scenario | Within 1 year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.90%
UBS AG | Upside ECL scenario | cumulative 3-year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	10.40%
UBS AG | Upside ECL scenario | cumulative 3-year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	10.90%
UBS AG | Upside ECL scenario | cumulative 3-year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	9.50%
UBS AG | Upside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	5.50%
UBS AG | Upside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	8.60%
UBS AG | Upside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	6.70%
UBS AG | Upside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.80%)
UBS AG | Upside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.90%)
UBS AG | Upside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.90%)
UBS AG | Upside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.741%
UBS AG | Upside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.217%
UBS AG | Upside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.83%
UBS AG | Upside ECL scenario | cumulative 3-year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	42.70%
UBS AG | Upside ECL scenario | cumulative 3-year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	44.30%
UBS AG | Upside ECL scenario | cumulative 3-year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	42.20%
UBS AG | Upside ECL scenario | cumulative 3-year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	14.10%
UBS AG | Upside ECL scenario | cumulative 3-year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	17.70%
UBS AG | Upside ECL scenario | cumulative 3-year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	15.40%
UBS AG | Baseline ECL scenario | Within 1 year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.50%
UBS AG | Baseline ECL scenario | Within 1 year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.90%
UBS AG | Baseline ECL scenario | Within 1 year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.00%
UBS AG | Baseline ECL scenario | Within 1 year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.80%
UBS AG | Baseline ECL scenario | Within 1 year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.80%
UBS AG | Baseline ECL scenario | Within 1 year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.30%
UBS AG | Baseline ECL scenario | Within 1 year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.10%
UBS AG | Baseline ECL scenario | Within 1 year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.40%)
UBS AG | Baseline ECL scenario | Within 1 year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.10%)
UBS AG | Baseline ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.002%
UBS AG | Baseline ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.084%
UBS AG | Baseline ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.095%
UBS AG | Baseline ECL scenario | Within 1 year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	3.50%
UBS AG | Baseline ECL scenario | Within 1 year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.50%
UBS AG | Baseline ECL scenario | Within 1 year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.40%
UBS AG | Baseline ECL scenario | Within 1 year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.10%
UBS AG | Baseline ECL scenario | Within 1 year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.00%
UBS AG | Baseline ECL scenario | Within 1 year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.20%
UBS AG | Baseline ECL scenario | cumulative 3-year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.80%
UBS AG | Baseline ECL scenario | cumulative 3-year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	6.40%
UBS AG | Baseline ECL scenario | cumulative 3-year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.80%
UBS AG | Baseline ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.70%
UBS AG | Baseline ECL scenario | cumulative 3-year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	6.20%
UBS AG | Baseline ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.30%
UBS AG | Baseline ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.30%
UBS AG | Baseline ECL scenario | cumulative 3-year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.50%)
UBS AG | Baseline ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.20%)
UBS AG | Baseline ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.101%
UBS AG | Baseline ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.282%
UBS AG | Baseline ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.30%
UBS AG | Baseline ECL scenario | cumulative 3-year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	9.50%
UBS AG | Baseline ECL scenario | cumulative 3-year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.40%
UBS AG | Baseline ECL scenario | cumulative 3-year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	5.30%
UBS AG | Baseline ECL scenario | cumulative 3-year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.30%
UBS AG | Baseline ECL scenario | cumulative 3-year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	16.70%
UBS AG | Baseline ECL scenario | cumulative 3-year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.20%
UBS AG | Mild downside ECL scenario | Within 1 year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.80%)
UBS AG | Mild downside ECL scenario | Within 1 year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.50%)
UBS AG | Mild downside ECL scenario | Within 1 year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.30%)
UBS AG | Mild downside ECL scenario | Within 1 year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.80%
UBS AG | Mild downside ECL scenario | Within 1 year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.90%
UBS AG | Mild downside ECL scenario | Within 1 year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.80%
UBS AG | Mild downside ECL scenario | Within 1 year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.50%
UBS AG | Mild downside ECL scenario | Within 1 year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.30%
UBS AG | Mild downside ECL scenario | Within 1 year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.60%
UBS AG | Mild downside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.875%
UBS AG | Mild downside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.125%
UBS AG | Mild downside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.875%
UBS AG | Mild downside ECL scenario | Within 1 year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(20.30%)
UBS AG | Mild downside ECL scenario | Within 1 year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(15.50%)
UBS AG | Mild downside ECL scenario | Within 1 year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(19.00%)
UBS AG | Mild downside ECL scenario | Within 1 year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(7.30%)
UBS AG | Mild downside ECL scenario | Within 1 year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(4.00%)
UBS AG | Mild downside ECL scenario | Within 1 year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.20%)
UBS AG | Mild downside ECL scenario | cumulative 3-year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.10%)
UBS AG | Mild downside ECL scenario | cumulative 3-year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.00%
UBS AG | Mild downside ECL scenario | cumulative 3-year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.70%
UBS AG | Mild downside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	4.20%
UBS AG | Mild downside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	11.10%
UBS AG | Mild downside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	6.20%
UBS AG | Mild downside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.20%
UBS AG | Mild downside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.70%
UBS AG | Mild downside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	1.00%
UBS AG | Mild downside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.625%
UBS AG | Mild downside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.25%
UBS AG | Mild downside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.625%
UBS AG | Mild downside ECL scenario | cumulative 3-year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(23.50%)
UBS AG | Mild downside ECL scenario | cumulative 3-year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(14.70%)
UBS AG | Mild downside ECL scenario | cumulative 3-year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(24.00%)
UBS AG | Mild downside ECL scenario | cumulative 3-year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(15.80%)
UBS AG | Mild downside ECL scenario | cumulative 3-year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(11.90%)
UBS AG | Mild downside ECL scenario | cumulative 3-year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(6.80%)
UBS AG | Severe downside ECL scenario | Within 1 year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(7.00%)
UBS AG | Severe downside ECL scenario | Within 1 year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(6.40%)
UBS AG | Severe downside ECL scenario | Within 1 year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(9.10%)
UBS AG | Severe downside ECL scenario | Within 1 year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.80%)
UBS AG | Severe downside ECL scenario | Within 1 year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.20%)
UBS AG | Severe downside ECL scenario | Within 1 year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.30%)
UBS AG | Severe downside ECL scenario | Within 1 year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	2.60%
UBS AG | Severe downside ECL scenario | Within 1 year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	5.70%
UBS AG | Severe downside ECL scenario | Within 1 year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	5.60%
UBS AG | Severe downside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.00%)
UBS AG | Severe downside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.30%)
UBS AG | Severe downside ECL scenario | Within 1 year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.70%)
UBS AG | Severe downside ECL scenario | Within 1 year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(53.00%)
UBS AG | Severe downside ECL scenario | Within 1 year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(60.00%)
UBS AG | Severe downside ECL scenario | Within 1 year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(56.20%)
UBS AG | Severe downside ECL scenario | Within 1 year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(15.20%)
UBS AG | Severe downside ECL scenario | Within 1 year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(13.30%)
UBS AG | Severe downside ECL scenario | Within 1 year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(23.00%)
UBS AG | Severe downside ECL scenario | cumulative 3-year | Real GDP growth (%) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(6.20%)
UBS AG | Severe downside ECL scenario | cumulative 3-year | Real GDP growth (%) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(4.30%)
UBS AG | Severe downside ECL scenario | cumulative 3-year | Real GDP growth (%) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(10.80%)
UBS AG | Severe downside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.60%)
UBS AG | Severe downside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	0.40%
UBS AG | Severe downside ECL scenario | cumulative 3-year | Consumer price inflation (% change) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(1.70%)
UBS AG | Severe downside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Switzerland
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	3.60%
UBS AG | Severe downside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | United States
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	5.60%
UBS AG | Severe downside ECL scenario | cumulative 3-year | Unemployment rate (%, average) | Eurozone
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	7.90%
UBS AG | Severe downside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | USD
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.75%)
UBS AG | Severe downside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | EUR
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.20%)
UBS AG | Severe downside ECL scenario | cumulative 3-year | Fixed income: 10-year government bonds (bps) | CHF
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(0.35%)
UBS AG | Severe downside ECL scenario | cumulative 3-year | Equity indices (% change) | S&P500
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(42.90%)
UBS AG | Severe downside ECL scenario | cumulative 3-year | Equity indices (% change) | EuroStoxx50
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(52.90%)
UBS AG | Severe downside ECL scenario | cumulative 3-year | Equity indices (% change) | SPI
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(46.80%)
UBS AG | Severe downside ECL scenario | cumulative 3-year | Swiss real estate (% change) | Single Family Homes
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(27.00%)
UBS AG | Severe downside ECL scenario | cumulative 3-year | Other real estate (% change) | United States S&P / Case Shiller
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(23.40%)
UBS AG | Severe downside ECL scenario | cumulative 3-year | Other real estate (% change) | Eurozone Housing Price Index
Disclosure Of Key Macro Economic Variables Used For Expected Credit Loss Model [Line Items]
Economic forecast	(33.20%)