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Related parties (Tables) | 12 Months Ended
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Dec. 31, 2023
Executive Board and Board of Directors loans |
|  | 2023 |  | 2022 |  | 2021 |
Executive Board loans (CHF million)
Balance at beginning of period |  | 6 | 1 | 18 |  | 13 |
Additions |  | 1 |  | 1 |  | 10 |
Reductions |  | (1) |  | (13) |  | (5) |
Balance at end of period |  | 6 | 1 | 6 |  | 18 |
Board of Directors loans (CHF million)
Balance at beginning of period |  | 4 | 2 | 7 |  | 9 |
Additions |  | 0 |  | 0 |  | 2 |
Reductions |  | (1) |  | (3) |  | (4) |
Balance at end of period |  | 3 | 2 | 4 |  | 7 |
1 The number of individuals with outstanding loans was four at the beginning of the year and three at the end of the year.
2 The number of individuals with outstanding loans was two at the beginning of the year and one at the end of the year.
Schedule of Related Party Transactions [Table Text Block] | Related party assets and liabilities
end of |  | 2023 |  | 2022 |
Assets (CHF million)
Cash and due from banks |  | 418 |  | 0 |
Central bank funds sold, securities purchased under resale agreements and securities borrowing transactions |  | 376 |  | 0 |
Trading assets |  | 111 |  | 42 |
Net loans |  | 1,251 |  | 3,949 |
All other assets |  | 796 |  | 86 |
Total assets |  | 2,952 |  | 4,077 |
Liabilities (CHF million)
Due to banks/customer deposits |  | 1,020 |  | 1,320 |
Central bank funds purchased, securities sold under repurchase agreements and securities lending transactions |  | 343 |  | 91 |
Trading liabilities |  | 67 |  | 0 |
Short-term borrowings |  | 4,000 |  | 2,075 |
Long-term debt |  | 48,843 |  | 56,822 |
All other liabilities |  | 1,865 |  | 1,284 |
Total liabilities |  | 56,138 |  | 61,592 |
Related party revenues and expenses
in |  | 2023 |  | 2022 |  | 2021 |
Revenues (CHF million)
Interest and dividend income |  | 114 |  | 13 |  | (56) |
Interest expense |  | (3,927) |  | (2,506) |  | (1,673) |
Net interest income |  | (3,813) |  | (2,493) |  | (1,729) |
Commissions and fees |  | 17 |  | 82 |  | 102 |
Other revenues |  | 14,354 |  | 246 |  | 212 |
Net revenues |  | 10,558 |  | (2,165) |  | (1,415) |
Expenses (CHF million)
Total operating expenses |  | 2,497 |  | 2,326 |  | 2,089 |
Related party guarantees and commitments
end of |  | 2023 |  | 2022 |
Guarantees and commitments (CHF million)
Credit guarantees and similar instruments |  | 0 |  | 4 |
Revocable loan commitments |  | 32 |  | 59 |

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- Definition Schedule of activity in the entity's loans to the members of the Board of Directors and the Executive Board. + References No definition available. + Details
Name: | cs_LoansToMembersBODAndExecutiveBoardTableTextBlock
Namespace Prefix: | cs_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration