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Debt issued measured at amortized cost (Detail) - USD ($) $ in Millions | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Disclosure Of Financial Liabilities [Line Items] |  |  |  |
Certificates of deposit |  | $ 12,193 | $ 14,723 | $ 15,680
Commercial paper |  | 25,304 | 26,591 | 25,472
Other short-term debt |  | 5,219 | 6,080 | 5,515
Short-term debt | [1] | 42,716 | 47,394 | 46,666
Senior unsecured debt that contributes to total loss-absorbing capacity (TLAC) |  | 37,765 | 37,453 | 36,611
Senior unsecured debt other than TLAC |  | 28,945 | 28,990 | 21,340
of which: issued by UBS AG with original maturity greater than one year | [2] | 26,109 | 23,309 | 18,464
Covered bonds |  | 1,449 | 2,606 | 2,796
Subordinated debt |  | 20,072 | 19,327 | 22,157
of which: high-trigger loss-absorbing additional tier 1 capital instruments |  | 12,330 | 11,573 | 11,837
of which: low-trigger loss-absorbing additional tier 1 capital instruments |  | 2,509 | 2,501 | 2,577
of which: low-trigger loss-absorbing tier 2 capital instruments |  | 4,686 | 4,709 | 7,201
of which: non-Basel III-compliant tier 2 capital instruments |  | 547 | 544 | 543
Debt issued through the Swiss central mortgage institutions |  | 8,963 | 8,911 | 9,660
Other long-term debt |  | 0 | 2 | 3
Long-term debt | [3] | 97,195 | 97,288 | 92,566
Total debt issued measured at amortized cost | [4] | $ 139,911 | $ 144,682 | $ 139,232
Unsecured portion of senior fixed-rate bonds issued by UBS AG with maturity greater than one year |  | 100.00% | 100.00% | 100.00%
[1] | <div>Debt with an original contractual maturity of less than one year</div>
[2] | <div>Based on original contractual maturity without considering any early redemption features. As of 30 June 2021, 100% of the balance was unsecured (31 March 2021: 100%; 31 December 2020: 100%).</div>
[3] | <div>Debt with an original contractual maturity greater than or equal to one year. The classification of debt issued into short-term and long-term does not consider any early redemption features.</div>
[4] | <div>Net of bifurcated embedded derivatives, the fair value of which was not material for the periods presented.</div>

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- Definition The amount of commercial paper issued by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of current debt instruments issued. [Refer: Debt instruments issued] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of instruments issued by the entity that represent indebtedness. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of non-current debt instruments issued. [Refer: Debt instruments issued] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of liabilities that are subordinate to other liabilities with respect to claims. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of senior fixed-rate bonds issued by UBS AG, which have maturity greater than one year. + References No definition available. + Details
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- Definition The percentage for unsecured portion of senior fixed-rate bonds issued by UBS AG, which have maturity greater than one year. + References No definition available. + Details
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- Definition The amount of covered bonds issued by the entity. + References No definition available. + Details
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- Definition The amount of senior unsecured bonds other than TLAC issued by the entity. + References No definition available. + Details
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- Definition The amount of certificates of deposits issued by the entity. + References No definition available. + Details
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- Definition The amount of debt issued through the central bond institutions of the Swiss regional or cantonal banks + References No definition available. + Details
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- Definition The amount of other miscellaneous long-term debt issued by the entiy + References No definition available. + Details
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- Definition The amount of liabilities from high-trigger loss-absorbing additional tier 1 capital instruments that are subordinate to other liabilities with respect to claims. + References No definition available. + Details
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- Definition The amount of liabilities from low-trigger loss-absorbing additional tier 1 capital instruments that are subordinate to other liabilities with respect to claims. + References No definition available. + Details
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- Definition The amount of liabilities from low-trigger loss-absorbing tier 2 capital instruments that are subordinate to other liabilities with respect to claims. + References No definition available. + Details
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- Definition The amount of liabilities from non Basel III-compliant tier 2 capital instruments that are subordinate to other liabilities with respect to claims. + References No definition available. + Details
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- Definition The amount of total loss-absorbing capacity (TLAC)-eligible senior unsecured debt measured at amortized cost included in gone concern loss-absorbing capacity. + References No definition available. + Details
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