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Guarantees and commitments - Other guarantees (Details 2) - CHF (SFr) SFr in Billions | 12 Months Ended
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Jun. 30, 2024 | Dec. 31, 2023
Guarantees |  |
Amount jointly guaranteed by deposit-taking banks and securities dealers in Switzerland |  | SFr 6.0
Deposit Insurance Guarantee Scheme, Amount Guaranteed, Percentage |  | 1.60%
Group's share in amount jointly guaranteed by deposit-taking banks and securities dealers in Switzerland | SFr 0.6 |

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- Definition Represents the amount jointly guaranteed by deposit-taking banks and securities dealers in Switzerland under deposit insurance guarantee scheme. + References No definition available. + Details
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Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | cs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the share of reporting entity in the total amount jointly guaranteed by deposit-taking banks and securities dealers in Switzerland in deposit insurance guarantee scheme. + References No definition available. + Details
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Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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