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FVM - Level 3 instruments: Sensitivity to changes in unobservable input assumptions (Detail) - USD ($) $ in Millions | 3 Months Ended
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Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022
Disclosure Of Sensitivity Analysis Of Fair Value Measurement To Changes In Unobservable Inputs Assets And Liabilities [Line Items] |  |  |
Favorable changes | $ 2,308 | $ 791 | $ 738
Unfavorable changes | (1,978) | (744) | (696)
Credit Suisse |  |  |
Disclosure Of Sensitivity Analysis Of Fair Value Measurement To Changes In Unobservable Inputs Assets And Liabilities [Line Items] |  |  |
Favorable changes | 1,578 |  |
Unfavorable changes | (1,312) |  |
Traded loans, loans measured at fair value, loan commitments and guarantees |  |  |
Disclosure Of Sensitivity Analysis Of Fair Value Measurement To Changes In Unobservable Inputs Assets And Liabilities [Line Items] |  |  |
Favorable changes | 325 | 12 | 19
Unfavorable changes | (234) | (13) | (12)
Securities financing transactions |  |  |
Disclosure Of Sensitivity Analysis Of Fair Value Measurement To Changes In Unobservable Inputs Assets And Liabilities [Line Items] |  |  |
Favorable changes | 37 | 27 | 33
Unfavorable changes | (37) | (29) | (37)
Auction rate securities |  |  |
Disclosure Of Sensitivity Analysis Of Fair Value Measurement To Changes In Unobservable Inputs Assets And Liabilities [Line Items] |  |  |
Favorable changes | 44 | 45 | 46
Unfavorable changes | (44) | (45) | (46)
Asset-backed securities |  |  |
Disclosure Of Sensitivity Analysis Of Fair Value Measurement To Changes In Unobservable Inputs Assets And Liabilities [Line Items] |  |  |
Favorable changes | 48 | 29 | 27
Unfavorable changes | (47) | (27) | (27)
Equity instruments |  |  |
Disclosure Of Sensitivity Analysis Of Fair Value Measurement To Changes In Unobservable Inputs Assets And Liabilities [Line Items] |  |  |
Favorable changes | 483 | 188 | 183
Unfavorable changes | (397) | (164) | (161)
Investment fund units |  |  |
Disclosure Of Sensitivity Analysis Of Fair Value Measurement To Changes In Unobservable Inputs Assets And Liabilities [Line Items] |  |  |
Favorable changes | 127 | 29 | 19
Unfavorable changes | (129) | (30) | (21)
Interest rate derivative contracts, net |  |  |
Disclosure Of Sensitivity Analysis Of Fair Value Measurement To Changes In Unobservable Inputs Assets And Liabilities [Line Items] |  |  |
Favorable changes | 221 | 20 | 18
Unfavorable changes | (111) | (13) | (12)
Credit derivative contracts, net |  |  |
Disclosure Of Sensitivity Analysis Of Fair Value Measurement To Changes In Unobservable Inputs Assets And Liabilities [Line Items] |  |  |
Favorable changes | 75 | 3 | 3
Unfavorable changes | (67) | (5) | (4)
Foreign exchange derivative contracts, net |  |  |
Disclosure Of Sensitivity Analysis Of Fair Value Measurement To Changes In Unobservable Inputs Assets And Liabilities [Line Items] |  |  |
Favorable changes | 6 | 4 | 10
Unfavorable changes | (6) | (5) | (5)
Equity / index derivative contracts, net |  |  |
Disclosure Of Sensitivity Analysis Of Fair Value Measurement To Changes In Unobservable Inputs Assets And Liabilities [Line Items] |  |  |
Favorable changes | 646 | 371 | 361
Unfavorable changes | (614) | (338) | (330)
Other |  |  |
Disclosure Of Sensitivity Analysis Of Fair Value Measurement To Changes In Unobservable Inputs Assets And Liabilities [Line Items] |  |  |
Favorable changes | 296 | 63 | 20
Unfavorable changes | $ (292) | $ (74) | $ (41)

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