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Provisions - additional information (Detail) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Jun. 30, 2023 | Jun. 12, 2023
Disclosure Of Other Provisions [Line Items] |  |
Balance at the beginning of period | $ 3,723 |
Provisions recognized upon acquisition of Credit Suisse |  | $ 3,545
Increase in provisions recognized in the income statement | 111 |
Release of provisions recognized in the income statement | (9) |
Provisions used in conformity with designated purpose | (216) |
Foreign currency translation and other movements | 16 |
Balance at the end of period | 7,170 |
Credit Suisse |  |
Disclosure Of Other Provisions [Line Items] |  |
Balance at the end of period | 3,487 |
Litigation, regulatory and similar matters |  |
Disclosure Of Other Provisions [Line Items] |  |
Balance at the beginning of period | 3,306 |
Provisions recognized upon acquisition of Credit Suisse |  | 2,838
Increase in provisions recognized in the income statement | 70 |
Release of provisions recognized in the income statement | (1) |
Provisions used in conformity with designated purpose | (90) |
Foreign currency translation and other movements | 2 |
Balance at the end of period | 6,126 |
Litigation, regulatory and similar matters | Credit Suisse |  |
Disclosure Of Other Provisions [Line Items] |  |
Balance at the end of period | 2,837 |
Other |  |
Disclosure Of Other Provisions [Line Items] |  |
Balance at the beginning of period | 416 |
Provisions recognized upon acquisition of Credit Suisse |  | $ 707
Increase in provisions recognized in the income statement | 41 |
Release of provisions recognized in the income statement | (8) |
Provisions used in conformity with designated purpose | (126) |
Foreign currency translation and other movements | 14 |
Balance at the end of period | 1,044 |
Other | Credit Suisse |  |
Disclosure Of Other Provisions [Line Items] |  |
Balance at the end of period | $ 649 |

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- Definition The amount of additional other provisions made. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2022-03-24 -Paragraph 84 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2022-en-r&anchor=para_84_b&doctype=Standard -URIDate 2022-03-24 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount used (ie incurred and charged against the provision) for other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2022-03-24 -Paragraph 84 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2022-en-r&anchor=para_84_c&doctype=Standard -URIDate 2022-03-24 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition The amount reversed for unused other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2022-03-24 -Paragraph 84 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2022-en-r&anchor=para_84_d&doctype=Standard -URIDate 2022-03-24 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The increase (decrease) in other provisions resulting from (i) foreign currency exchange rate changes on provisions measured in a currency different from the entity's presentation currency; (ii) other movements (for example, capitalized reinstatement cost); and (iii) adjustments arising from the passage of time. + References No definition available. + Details
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Namespace Prefix: | ubs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of provisions other than provisions for expected credit losses and provisions related to loan commitments. + References No definition available. + Details
Name: | ubs_ProvisionsOther
Namespace Prefix: | ubs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of provisions recognised upon the acqusition of Credit Suisse. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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- Details
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- Details
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