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Significant valuation and income recognition differences between US GAAP and - Swiss GAAP banking law (Details) | 12 Months Ended
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Dec. 31, 2023 year week
Significant valuation and income recognition differences between US GAAP and Swiss GAAP banking law (true and fair view) |
Goodwill, maximum useful life (in years) | 5
Goodwill, maximum useful life for justified exceptional cases (in years) | 10
Intangible assets with indefinite lives, maximum useful life (in years) | 5
Intangible assets with indefinite lives, maximum useful life for justified exceptional cases (in years) | 10
Loan commitment notice period for Swiss GAAP (in weeks) | week | 6

X
- Definition This element represents the maximum useful life of goodwill for justified exceptional cases as accounted for under Swiss GAAP. + References No definition available. + Details
Name: | cs_GoodwillUsefulLifeExceptionalCasesMaximum
Namespace Prefix: | cs_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the maximum useful life of goodwill as accounted for under Swiss GAAP. + References No definition available. + Details
Name: | cs_GoodwillUsefulLifeMaximum
Namespace Prefix: | cs_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the maximum useful life of indefinite-lived intangible assets for justified exceptional cases excluding goodwill as accounted for under Swiss GAAP. + References No definition available. + Details
Name: | cs_IndefiniteLivedIntangibleAssetsExcludingGoodwillUsefulLifeExceptionalCasesMaximum
Namespace Prefix: | cs_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the maximum useful life of indefinite-lived intangible assets excluding goodwill as accounted for under Swiss GAAP. + References No definition available. + Details
Name: | cs_IndefiniteLivedIntangibleAssetsExcludingGoodwillUsefulLifeMaximum
Namespace Prefix: | cs_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period of time included in the entity's notice period for loan commitments, which requires that loan commitment to be disclosed under Swiss GAAP if exceeded, expressed in weeks. + References No definition available. + Details
Name: | cs_LoanCommitmentDisclosurePolicySwissGAAPNoticePeriod
Namespace Prefix: | cs_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

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