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FVM - Level 3 instruments: Valuation techniques and inputs (Detail) $ in Millions | 3 Months Ended |
--- | --- | ---
Jun. 30, 2021 USD ($) | Dec. 31, 2020 USD ($) | Mar. 31, 2021 USD ($)
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Financial assets measured at fair value |  | $ 345,820 | $ 404,805 | $ 376,304
Financial liabilities measured at fair value |  | 299,869 | 325,069 | 324,088
Level 3 |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Financial assets measured at fair value |  | 8,129 | 8,278 | 8,266
Financial liabilities measured at fair value |  | 18,398 | 15,212 | $ 16,355
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Corporate and municipal bonds |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Financial assets measured at fair value |  | 1,200 | 1,200 |
Financial liabilities measured at fair value |  | $ 0 | $ 0 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Corporate and municipal bonds | Relative value to market comparable | Bond price equivalent (% of par) | low |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0015 | 0.0001 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Corporate and municipal bonds | Relative value to market comparable | Bond price equivalent (% of par) | high |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0143 | 0.0143 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Corporate and municipal bonds | Relative value to market comparable | Bond price equivalent (% of par) | weighted average |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1],[2] | 0.0100 | 0.0100 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Corporate and municipal bonds | Discounted expected cash flows | Discount margin | low |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0358 | 0.0268 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Corporate and municipal bonds | Discounted expected cash flows | Discount margin | high |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0358 | 0.0268 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Traded loans, loans mandatorily at fair value, loan commitments and guarantees |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Financial assets measured at fair value |  | $ 2,600 | $ 2,400 |
Financial liabilities measured at fair value |  | $ 0 | $ 0 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Traded loans, loans mandatorily at fair value, loan commitments and guarantees | Relative value to market comparable | Loan price equivalent (% of par) | low |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0001 | 0 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Traded loans, loans mandatorily at fair value, loan commitments and guarantees | Relative value to market comparable | Loan price equivalent (% of par) | high |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0101 | 0.0101 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Traded loans, loans mandatorily at fair value, loan commitments and guarantees | Relative value to market comparable | Loan price equivalent (% of par) | weighted average |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1],[2] | 0.0099 | 0.0099 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Traded loans, loans mandatorily at fair value, loan commitments and guarantees | Discounted expected cash flows | Credit spread | low |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0180 | 0.0190 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Traded loans, loans mandatorily at fair value, loan commitments and guarantees | Discounted expected cash flows | Credit spread | high |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0800 | 0.0800 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Traded loans, loans mandatorily at fair value, loan commitments and guarantees | Market comparable and securitization model | Credit spread | low |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0028 | 0.0040 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Traded loans, loans mandatorily at fair value, loan commitments and guarantees | Market comparable and securitization model | Credit spread | high |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.1558 | 0.1858 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Traded loans, loans mandatorily at fair value, loan commitments and guarantees | Market comparable and securitization model | Credit spread | weighted average |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1],[2] | 0.0228 | 0.0333 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Traded loans, loans mandatorily at fair value, loan commitments and guarantees | Market comparable and securitization model | Discount margin | low |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0115 | 0.0100 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Traded loans, loans mandatorily at fair value, loan commitments and guarantees | Market comparable and securitization model | Discount margin | high |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0222 | 0.0188 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Traded loans, loans mandatorily at fair value, loan commitments and guarantees | Market comparable and securitization model | Discount margin | weighted average |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1],[2] | 0.0162 | 0.0140 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Auction rate securities |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Financial assets measured at fair value |  | $ 1,600 | $ 1,500 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Auction rate securities | Discounted expected cash flows | Credit spread | low |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0115 | 0.0100 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Auction rate securities | Discounted expected cash flows | Credit spread | high |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0222 | 0.0188 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Auction rate securities | Discounted expected cash flows | Credit spread | weighted average |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1],[2] | 0.0162 | 0.0140 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Investment fund units |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Financial assets measured at fair value | [3] | $ 100 | $ 100 |
Financial liabilities measured at fair value | [3] | 0 | 0 |
Level 3 | Financial assets and liabilities at fair value held for trading, Financial assets at fair value not held for trading: Equity instruments |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Financial assets measured at fair value | [3] | 700 | 700 |
Financial liabilities measured at fair value | [3] | 100 | 0 |
Level 3 | Debt issued designated at fair value |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Financial liabilities measured at fair value | [4] | 14,700 | 11,000 |
Level 3 | Other financial liabilities designated at fair value |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Financial liabilities measured at fair value |  | $ 600 | $ 700 |
Level 3 | Other financial liabilities designated at fair value | Discounted expected cash flows | Funding spread | low |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0035 | 0.0042 |
Level 3 | Other financial liabilities designated at fair value | Discounted expected cash flows | Funding spread | high |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0175 | 0.0175 |
Level 3 | Derivative financial instruments: Interest rate contracts |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Financial assets measured at fair value |  | $ 300 | $ 500 |
Financial liabilities measured at fair value |  | $ 500 | $ 500 |
Level 3 | Derivative financial instruments: Interest rate contracts | Option model | Volatility of interest rates | low |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0049 | 0.0029 |
Level 3 | Derivative financial instruments: Interest rate contracts | Option model | Volatility of interest rates | high |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0073 | 0.0069 |
Level 3 | Derivative financial instruments: Credit derivative contracts |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Financial assets measured at fair value |  | $ 300 | $ 300 |
Financial liabilities measured at fair value |  | $ 400 | $ 500 |
Level 3 | Derivative financial instruments: Credit derivative contracts | Discounted expected cash flows | Bond price equivalent (% of par) | low |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.03 | 0 |
Level 3 | Derivative financial instruments: Credit derivative contracts | Discounted expected cash flows | Bond price equivalent (% of par) | high |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 1.02 | 1 |
Level 3 | Derivative financial instruments: Credit derivative contracts | Discounted expected cash flows | Credit spread | low |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0002 | 0.0001 |
Level 3 | Derivative financial instruments: Credit derivative contracts | Discounted expected cash flows | Credit spread | high |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.0496 | 0.0489 |
Level 3 | Derivative financial instruments: Equity / index contracts |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Financial assets measured at fair value |  | $ 800 | $ 900 |
Financial liabilities measured at fair value |  | $ 1,900 | $ 2,300 |
Level 3 | Derivative financial instruments: Equity / index contracts | Option model | Equity dividend yields | low |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0 | 0 |
Level 3 | Derivative financial instruments: Equity / index contracts | Option model | Equity dividend yields | high |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) | [1] | 0.11 | 0.13 |
Level 3 | Derivative financial instruments: Equity / index contracts | Option model | Volatility of equity stocks, equity and other indices | low |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) |  | 0.04 | 0.04 |
Level 3 | Derivative financial instruments: Equity / index contracts | Option model | Volatility of equity stocks, equity and other indices | high |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) |  | 0.99 | 1 |
Level 3 | Derivative financial instruments: Equity / index contracts | Option model | Equity-to-FX correlation | low |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) |  | (0.30) | (0.34) |
Level 3 | Derivative financial instruments: Equity / index contracts | Option model | Equity-to-FX correlation | high |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) |  | 0.70 | 0.65 |
Level 3 | Derivative financial instruments: Equity / index contracts | Option model | Equity-to-equity correlation | low |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) |  | (0.25) | (0.16) |
Level 3 | Derivative financial instruments: Equity / index contracts | Option model | Equity-to-equity correlation | high |  |  |  |
Disclosure Of Fair Value Measurement [Line Items] |  |  |  |
Significant unobservable input(s) |  | 0.99 | 1 |
[1] | <div>The ranges of significant unobservable inputs are represented in points, percentages and basis points. Points are a percentage of par (e.g., 100 points would be 100% of par)</div>
[2] | <div>Weighted averages are provided for non-derivative financial instruments and were calculated by weighting inputs based on the fair values of the respective instruments. Weighted averages are not provided for inputs related to derivative contracts, as this would not be meaningful.</div>
[3] | <div>The range of inputs is not disclosed, as there is a dispersion of values given the diverse nature of the investments.</div>
[4] | <div>Debt issued designated at fair value is composed primarily of UBS structured notes, which include variable maturity notes with various equity and foreign exchange underlying risks, rates-linked and credit-linked notes, all of which have embedded derivative parameters that are considered to be unobservable. The equivalent derivative instrument parameters are presented in the respective derivative financial instruments lines in this table.</div>

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