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v3.23.3

Assets pledged and collateral (Details) - CHF (SFr) SFr in Millions | 6 Months Ended
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Jun. 30, 2023 | Dec. 31, 2022
Assets pledged and collateral |  |
Total assets pledged or assigned as collateral | SFr 113,063 | SFr 63,111
of which encumbered | 14,501 | 25,445
Fair value of collateral received with the right to sell or repledge | 91,345 | 150,198
of which sold or repledged | SFr 32,009 | SFr 75,819

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

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- Definition The carrying value, as of the date of each statement of financial position presented, of assets which are owned but pledged or assigned as collateral. + References No definition available. + Details
Name: | cs_AssetsPledgedOrAssignedAsCollateralAtCarryingValue
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The carrying value as of the balance sheet date of assets pledged or assigned as collateral with the right to sell or repledge by the entity. + References No definition available. + Details
Name: | cs_AssetsPledgedOrAssignedAsCollateralWithRightToSellOrRepledge
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | cs_FairValueOfCollateralReceivedWithRightToSellRepledge
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The fair value of collateral received that has been sold or re-pledged and is owed to the debtor (transferor) upon settlement of the related contractual obligation under which it was received. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 + Details
Name: | us-gaap_SecuritiesReceivedAsCollateralAmountRepledgedAndSold
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration