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Guarantees and commitments - Other commitments maturity (Details 7) - CHF (SFr) SFr in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Other commitments |  |
Maturity less than 1 year | SFr 14,087 | SFr 23,883
Maturity between 1 to 3 years | 22,548 | 33,569
Maturity between 3 to 5 years | 22,981 | 44,565
Maturity greater than 5 years | 4,817 | 15,051
Total gross amount | 64,433 | 117,068
Total net amount | 61,149 | 112,870
Unused revocable credit limits | 98,850 | 129,224
Irrevocable commitments under documentary credits |  |
Other commitments |  |
Maturity less than 1 year | 2,195 | 3,378
Maturity between 1 to 3 years | 28 | 41
Maturity between 3 to 5 years | 0 | 0
Maturity greater than 5 years | 0 | 1
Total gross amount | 2,223 | 3,420
Total net amount | 2,159 | 3,233
Loan commitments |  |
Other commitments |  |
Maturity less than 1 year | 11,471 | 19,272
Maturity between 1 to 3 years | 22,514 | 33,512
Maturity between 3 to 5 years | 22,980 | 44,563
Maturity greater than 5 years | 4,615 | 14,782
Total gross amount | 61,580 | 112,129
Total net amount | 58,361 | 108,118
Forward reverse repurchase agreements |  |
Other commitments |  |
Maturity less than 1 year | 147 | 1,021
Maturity between 1 to 3 years | 0 | 0
Maturity between 3 to 5 years | 0 | 0
Maturity greater than 5 years | 0 | 0
Total gross amount | 147 | 1,021
Total net amount | 147 | 1,021
Other commitments |  |
Other commitments |  |
Maturity less than 1 year | 274 | 212
Maturity between 1 to 3 years | 6 | 16
Maturity between 3 to 5 years | 1 | 2
Maturity greater than 5 years | 202 | 268
Total gross amount | 483 | 498
Total net amount | SFr 482 | SFr 498

X
- Definition Maximum potential amount of future payments (undiscounted) the entity could be required to make between one to three years of the balance sheet date under the commitment agreement (or each group of similar commitment agreements) before reduction for potential recoveries under recourse or collateralization provisions. + References No definition available. + Details
Name: | cs_CommitmentObligationsMaturityBetweenOneToThreeYears
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum potential amount of future payments (undiscounted) the entity could be required to make between three to five years of the balance sheet date under the commitment agreement (or each group of similar commitment agreements) before reduction for potential recoveries under recourse or collateralization provisions. + References No definition available. + Details
Name: | cs_CommitmentObligationsMaturityBetweenThreeToFiveYears
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum potential amount of future payments (undiscounted) the entity could be required to make greater than five years of the balance sheet date under the commitment agreement (or each group of similar commitment agreements) before reduction for potential recoveries under recourse or collateralization provisions. + References No definition available. + Details
Name: | cs_CommitmentObligationsMaturityGreaterThanFiveYears
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum potential amount of future payments (undiscounted) the entity could be required to make within one year of the balance sheet date under the commitment agreement (or each group of similar commitment agreements) before reduction for potential recoveries under recourse or collateralization provisions. + References No definition available. + Details
Name: | cs_CommitmentObligationsMaturityLessThanOneYear
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum potential amount of future payments (undiscounted) the entity could be required to make under the commitment agreement (or each group of similar commitment agreements) before reduction for potential recoveries under recourse or collateralization provisions. + References No definition available. + Details
Name: | cs_CommitmentObligationsMaximumExposureGross
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum potential amount of future payments (undiscounted) the entity could be required to make under the commitment agreement (or each group of similar commitment agreements) after reduction for potential recoveries under recourse or collateralization provisions. + References No definition available. + Details
Name: | cs_CommitmentObligationsMaximumExposureNet
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the unused credit limits under the commitment agreement, which are revocable at the discretion of the reporting entity upon notice to client. + References No definition available. + Details
Name: | cs_CommitmentObligationsUnusedRevocableCreditLimit
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_OtherCommitmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=cs_IrrevocableCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=cs_LoanCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=cs_ForwardReverseRepurchaseAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=cs_OtherCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |