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Assets under management (Details) - CHF (SFr) SFr in Billions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Assets under management [Line Items] |  |  |
Assets in collective investment instruments managed by Credit Suisse | SFr 175.1 | SFr 194.6 |
Assets with discretionary mandates | 215.2 | 244.1 |
Other assets under management | 785.6 | 852.8 |
Assets under management (including double counting) | 1,175.9 | 1,291.5 | SFr 1,611.0
of which double counting | SFr 23.8 | SFr 31.9 |

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- References No definition available. + Details
Name: | cs_AssetsUnderManagementDisclosureLineItems
Namespace Prefix: | cs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition This element represents the portion of assets under management that result from double counting. Double counting arises when assets under management are subject to more than one level of asset management services. + References No definition available. + Details
Name: | cs_AssetsUnderManagementDoubleCounting
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition This element represents the assets in collective investments instruments managed by the reporting entity. + References No definition available. + Details
Name: | cs_AssetsUnderManagementInCollectiveInvestmentInstruments
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition This element represents the market value of assets that an investment company manages on behalf of investors, including double counting. + References No definition available. + Details
Name: | cs_AssetsUnderManagementIncludingDoubleCounting
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition This element represents the assets with discretionary mandates managed by the reporting entity. + References No definition available. + Details
Name: | cs_AssetsUnderManagementWithDiscretionaryMandates
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition This element represents other assets under management managed by the reporting entity. + References No definition available. + Details
Name: | cs_OtherAssetsUnderManagement
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant