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Trading assets and liabilities - Cash collateral - netted (Details 2) - CHF (SFr) SFr in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Cash collateral - netted |  |
Cash collateral paid | SFr 7,909 | SFr 11,924
Cash collateral - not netted |  |
Cash collateral paid | 6,718 | 7,723
Cash collateral received | SFr 677 | SFr 2,079

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

X
- Definition This element represents the cash collateral payables which are netted against derivative assets positions as of the balance sheet date. + References No definition available. + Details
Name: | cs_CashCollateralPaidOnDerivativeInstrumentsNettedAgainstDerivativePositions
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This element represents the cash collateral payables not netted against derivative positions which are recorded in other assets as of the balance sheet date. + References No definition available. + Details
Name: | cs_CashCollateralPaidOnDerivativeInstrumentsNotNettedAgainstDerivativePositions
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition This element represents the cash collateral receivables not netted against derivative positions which are recorded in other liabilities as of the balance sheet date. + References No definition available. + Details
Name: | cs_CashCollateralReceivedOnDerivativeInstrumentsNotNettedAgainstDerivativePositions
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant