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Accounting for the acquisition of Credit Suisse Group (Narrative) (Detail) - USD ($) $ in Millions |  | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jun. 12, 2023 | Jun. 30, 2023 | Jun. 30, 2023 | Jun. 30, 2023
Disclosure Of Business Combinations [Line items] |  |  |  |
Provisional negative goodwill resulting from the acquisition |  |  | $ 28,925 | $ 28,925
Provisions related to Credit Suisse loan commitments |  | $ 4,400 | 4,400 | 4,400
Acquisition-related contingent liabilities |  | 2,992 | $ 2,992 | 2,992
Credit Suisse |  |  |  |
Disclosure Of Business Combinations [Line items] |  |  |  |
Conversion impact from the different derivative netting rules | $ 70,000 |  |  |
Fair value adjustments recognized on financial instruments that are classified at fair value through profit or loss | 2,300 |  |  |
Fair value adjustments recognized on financial instruments at amortized cost and off-balance sheet commitments and guarantees | 12,400 |  |  |
Provisional negative goodwill resulting from the acquisition | 28,925 |  |  | 28,925
Acquisition-related costs | 200 |  |  |
Credit Suisse contribution to net revenues of the Group |  | 1,200 |  |
Credit Suisse contribution to net profit of the Group |  | $ 1,200 |  |
Estimated net revenues for the Group |  |  |  | 24,000
Estimated profit loss for the Group |  |  |  | $ 900
Gain from the write-down of additional tier 1 capital notes | 16,400 |  |  |
Gain from the reversal of contingent compensation award accrual | 400 |  |  |
Provisional fair value of core deposits and customer relationships intangibles | 900 |  |  |
Mortgage servicing rights | 400 |  |  |
Goodwill impairment charge | $ 1,400 |  |  |
Vesting requirement for payment arrangement | 60 |  |  |
Retention awards | $ 500 |  |  |
Percentage of retention awards offered in shares | 50.00% |  |  |
Percentage of retention awards offered in cash | 50.00% |  |  |
Expenses on retention awards | $ 84 |  |  |
Additional provisions and contingent liabilities | 4,500 |  |  |
Acquisition-related contingent liabilities | 3,000 |  |  |
Litigation provisions | 1,500 |  |  |
Fair value adjustments on acquired loan commitments and guarantees recognized under IFRS | 4,500 |  |  |
Fair value adjustments on acquired loan commitments and guarantees recognized under IFRS included in provisions and contingent liabilities | 4,300 |  |  |
Fair value adjustments on acquired loan commitments and guarantees recognized under IFRS included in derivative financial instruments liabilities | 200 |  |  |
Existing provisions of Credit Suisse Group | $ 1,300 |  |  |

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- Definition The profit (loss) of the combined entity as though the acquisition date for all business combinations that occurred during the year had been as of the beginning of the annual reporting period. [Refer: Business combinations [member]; Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2022-03-24 -Paragraph B64 -Subparagraph q -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2022-en-r&anchor=para_B64_q_ii&doctype=Appendix&subtype=B -URIDate 2022-03-24 + Details
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- Definition The amount of revenue of the acquiree since the acquisition date included in the consolidated statement of comprehensive income. [Refer: Revenue] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2022-03-24 -Paragraph B64 -Subparagraph q -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2022-en-r&anchor=para_B64_q_i&doctype=Appendix&subtype=B -URIDate 2022-03-24 + Details
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- Definition The revenue of the combined entity as though the acquisition date for all business combinations that occurred during the year had been as of the beginning of the annual reporting period. [Refer: Business combinations [member]; Revenue] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2022-03-24 -Paragraph B64 -Subparagraph q -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2022-en-r&anchor=para_B64_q_ii&doctype=Appendix&subtype=B -URIDate 2022-03-24 + Details
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- Definition The amount recognised as of the acquisition date for additional litigation provisions. + References No definition available. + Details
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- Definition The amount recognised as of the acquisition date for core deposits and customer relationships intangible assets acquired in a business combination. + References No definition available. + Details
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- Definition Reversal of the gain (loss) of contingent compensation award accrual recognised by Credit Suisse from 1st January 2023 until acquisition. + References No definition available. + Details
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- Definition Reversal of the gain (loss) recognised by Credit Suisse from 1st January until acquisition, as a result of the write down of additional tier 1 capital notes by Credit Suisse. + References No definition available. + Details
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- Definition The amount of existing provisions of Credit Suisse as of acquisition date. + References No definition available. + Details
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- Definition The percentage of retention awards to be delivered in cash, offered to Credit Suisse Group personnel. + References No definition available. + Details
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- Definition The percentage of retention awards to be delivered in shares, offered to Credit Suisse Group personnel. + References No definition available. + Details
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