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TFA - Principal amounts outstanding / total assets - continuing involvement (Details 2) - CHF (SFr) SFr in Millions | Jun. 30, 2023 | Dec. 31, 2022
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CMBS |  |
Principal amounts outstanding and total assets of SPEs resulting from continuing involvement |  |
Principal amount outstanding | SFr 5,170 | SFr 17,193
RMBS |  |
Principal amounts outstanding and total assets of SPEs resulting from continuing involvement |  |
Principal amount outstanding | 23,869 | 41,552
Other asset-backed financings |  |
Principal amounts outstanding and total assets of SPEs resulting from continuing involvement |  |
Principal amount outstanding | SFr 22,895 | SFr 21,939

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- Definition Principal amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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- Details
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- Details
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- Details
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