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Provisions (Detail 1) - USD ($) $ in Millions	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Disclosure Of Other Provisions [Line Items]
Provisions for expected credit losses	$ 367	$ 214	$ 201
Provisions related to Credit Suisse loan commitments	4,400
Provisions related to litigation, regulatory and similar matters	7,170	3,723	3,042
Acquisition-related contingent liabilities (IFRS 3, Business Combinations)	2,992
Total provisions	14,929	3,937	3,243
Litigation, regulatory and similar matters
Disclosure Of Other Provisions [Line Items]
Provisions related to litigation, regulatory and similar matters	6,126	3,306	2,586
Other
Disclosure Of Other Provisions [Line Items]
Provisions related to litigation, regulatory and similar matters	1,044	$ 416	$ 456
Credit Suisse
Disclosure Of Other Provisions [Line Items]
Provisions related to litigation, regulatory and similar matters	3,487
Total provisions	11,071
Credit Suisse | Litigation, regulatory and similar matters
Disclosure Of Other Provisions [Line Items]
Provisions related to litigation, regulatory and similar matters	2,837
Credit Suisse | Other
Disclosure Of Other Provisions [Line Items]
Provisions related to litigation, regulatory and similar matters	$ 649

X

- Definition

The amount of contingent liabilities recognised in a business combination. [Refer: Contingent liabilities [member]; Business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2022-03-24
-Paragraph B67
-Subparagraph c
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-URIDate 2022-03-24

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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.

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- Definition

The amount of liabilities of uncertain timing or amount, including provisions for employee benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 54
-Subparagraph l
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_54_l&doctype=Standard
-URIDate 2022-03-24

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- Definition

The amount of provisions related to Credit Suisse loan commitments.

+ References

No definition available.

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- Definition

The amount of the provisions for expected credit losses on loan commitments and financial guarantee contracts.

+ References

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- Definition

The amount of provisions other than provisions for expected credit losses and provisions related to loan commitments.

+ References

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