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Litigation (Details 1) $ in Thousands, € in Millions, £ in Millions, SFr in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($) | Dec. 31, 2023 EUR (€) | Dec. 31, 2023 CHF (SFr) | Dec. 31, 2023 GBP (£) | Dec. 31, 2022 USD ($)
Mozambique matter | US Department of Justice (DOJ) and Securities and Exchange Commission (SEC) |  |  |  |  |
Litigation disclosures |  |  |  |  |
of which fines | $ 275,000 |  |  |  |
Mozambique matter | US District Court for the Eastern District of New York (EDNY) | Penalty, final [Member] |  |  |  |  |
Litigation disclosures |  |  |  |  |
of which restitution | 22,600 |  |  |  |
Mozambique matter | UK Financial Services Authority |  |  |  |  |
Litigation disclosures |  |  |  |  |
Debt Relief | 200,000 |  |  |  |
Mozambique matter | UK Financial Services Authority | Penalty, basic [Member] | Minimum |  |  |  |  |
Litigation disclosures |  |  |  |  |
Loss contingency, damages paid, value | $ 200,000 |  |  |  |
Credit Suisse Securities (USA) LLC | Mortgage-related matters - Government and regulatory related | United States Department of Justice (DOJ) |  |  |  |  |
Litigation disclosures |  |  |  |  |
Litigation, Increase of Consumer Relief per Annum | 5.00% | 5.00% | 5.00% | 5.00% |
DLJ Mortgage Capital, Inc. | Mortgage-related matters - Repurchase litigations | Home Equity Loan Trust Series 2006-HE7 | New York state court | Minimum |  |  |  |  |
Litigation disclosures |  |  |  |  |
Estimated damages | $ 374,000 |  |  |  |
DLJ Mortgage Capital, Inc. | Mortgage-related matters - Repurchase litigations | Litigation, Plaintiff, CSMC Asset-Backed Trust 2007-NC1 | New York state court | Minimum |  |  |  |  |
Litigation disclosures |  |  |  |  |
Estimated damages | 0 |  |  |  |
DLJ Mortgage Capital, Inc. | Mortgage-related matters - Repurchase litigations | Home Equity Asset Trust Series 2006-8 | New York state court | Minimum |  |  |  |  |
Litigation disclosures |  |  |  |  |
Estimated damages | 436,000 |  |  |  |
DLJ Mortgage Capital, Inc. | Mortgage-related matters - Repurchase litigations | Home Equity Asset Trust Series 2007-1 | New York state court | Minimum |  |  |  |  |
Litigation disclosures |  |  |  |  |
Estimated damages | 420,000 |  |  |  |
DLJ Mortgage Capital, Inc. | Mortgage-related matters - Repurchase litigations | Home Equity Asset Trust Series 2007-2 | New York state court | Minimum |  |  |  |  |
Litigation disclosures |  |  |  |  |
Estimated damages | 495,000 |  |  |  |
DLJ Mortgage Capital, Inc. | Mortgage-related matters - Repurchase litigations | Home Equity Asset Trust Series 2007-3 | Minnesota state court | Minimum |  |  |  |  |
Litigation disclosures |  |  |  |  |
Estimated damages | 206,000 |  |  |  |
DLJ Mortgage Capital, Inc. | Mortgage-related matters - Repurchase litigations | Home Equity Mortgage Trust Series 2006-5 | New York state court | Minimum |  |  |  |  |
Litigation disclosures |  |  |  |  |
Estimated damages | 500,000 |  |  |  |
DLJ Mortgage Capital, Inc. | Mortgage-related matters - Repurchase litigations | Home Equity Mortgage Trust Series 2006-1, 2006-3 and 2006-4 | New York state court | Minimum |  |  |  |  |
Litigation disclosures |  |  |  |  |
Estimated damages | 730,000 |  |  |  |
DLJ Mortgage Capital, Inc. | Mortgage-related matters - Repurchase litigations | Home Equity Mortgage Trust Series 2006-1, 2006-3, 2006-4 and 2006-5 | New York state court |  |  |  |  |
Litigation disclosures |  |  |  |  |
Litigation Settlement, Amount Awarded to Other Party | 500,000 |  |  |  |
Credit Suisse AG and certain affiliates | Mortgage-related matters | Litigation, Plaintiff, Loreley | English Court | Minimum |  |  |  |  |
Litigation disclosures |  |  |  |  |
Estimated damages | 100,000 |  |  |  |
Credit Suisse Securities LLC and certain of its affiliates | Bank loan litigation | Highland Capital Management LP | Texas State Court | Original [Member] |  |  |  |  |
Litigation disclosures |  |  |  |  |
Litigation Settlement, Amount Awarded to Other Party | 287,000 |  |  |  |
Credit Suisse Securities LLC and certain of its affiliates | Bank loan litigation | Highland Capital Management LP | Texas State Court | Revised [Member] |  |  |  |  |
Litigation disclosures |  |  |  |  |
Litigation Settlement, Amount Awarded to Other Party | 121,000 |  |  |  |
Credit Suisse Securities LLC and certain of its affiliates | Bank loan litigation | Highland Capital Management LP | Texas supreme court | Reversed [Member] |  |  |  |  |
Litigation disclosures |  |  |  |  |
Litigation Settlement, Amount Awarded to Other Party | 212,000 |  |  |  |
Credit Suisse Group AG, Credit Suisse AG, Credit Suisse Securities (Europe) Limited | Rates Related Matters - regulatory matters - foreign exchange trading business | European Commission |  |  |  |  |
Litigation disclosures |  |  |  |  |
of which fines | € |  | € 83.3 |  |  |
Credit Suisse Group AG, Credit Suisse Securities (Europe) Limited | Rates Related Matters - regulatory matters - SSA bonds trading business | European Commission |  |  |  |  |
Litigation disclosures |  |  |  |  |
of which fines | € |  | € 11.9 |  |  |
Credit Suisse Life Bermuda Ltd [Member] | Customer acount matters, against former relationship manager | Supreme Court of Bermuda |  |  |  |  |
Litigation disclosures |  |  |  |  |
Estimated damages | $ 536,640 |  |  |  | $ 607,350
Bermuda Statutory Rate Of Interest | 3.50% | 3.50% | 3.50% | 3.50% |
Credit Suisse Life Bermuda Ltd [Member] | Customer acount matters, against former relationship manager | Supreme Court of Bermuda | Minimum |  |  |  |  |
Litigation disclosures |  |  |  |  |
Loss contingency, damages paid, value | $ 75,000 |  |  |  |
Credit Suisse Trust Limited, a Credit Suisse AG affiliate [Member] | Customer acount matters, against former relationship manager | Signapore International Commercial Court |  |  |  |  |
Litigation disclosures |  |  |  |  |
Estimated damages | 742,730 |  |  |  |
UBS Group, Credit Suisse AG, Credit Suisse Holdings (USA) and Credit Suisse AG, New York Branch | Archegos Capital Management | Board of Governors of the Federal Reserve System (Fed) | Penalty, final [Member] |  |  |  |  |
Litigation disclosures |  |  |  |  |
of which fines | 269,000 |  |  |  |
Credit Suisse International and Credit Suisse Securities (Europe) Limited | Archegos Capital Management | Prudential Regulation Authority (PRA) | Penalty, final [Member] |  |  |  |  |
Litigation disclosures |  |  |  |  |
of which fines | £ |  |  |  | £ 87 |
Credit Suisse AG | Customer acount matters, against former relationship manager | Geneva Prosecutor's Office |  |  |  |  |
Litigation disclosures |  |  |  |  |
Estimated damages | $ 130,000 |  |  |  |
Credit Suisse AG | Litigation Bulgarian former clients matter | Swiss Federal Criminal Court |  |  |  |  |
Litigation disclosures |  |  |  |  |
Estimated damages | SFr |  |  | SFr 19 |  |
of which fines | SFr |  |  | 2 |  |
Seized client assets | SFr |  |  | SFr 12 |  |

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