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Other variable compensation (Details 6) - CHF (SFr) SFr in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |
Compensation expense relating to deferred compensation | SFr 1,154 | SFr 1,318 | SFr 1,434
Estimated unrecognized compensation expense | SFr 512 |  |
Retention Awards |  |  |
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |
Deferred Compensation Arrangement with Individual, Description | The Bank granted deferred cash and share retention awards of CHF 447 million, CHF 355 million and CHF 395 million in 2023, 2022 and 2021, respectively. These awards are expensed over the applicable vesting period from the grant date. Amortization of these awards in 2023 totaled CHF 368 million, of which CHF 279 million was related to awards granted in 2023. |  |
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount | SFr 447 | 355 | 395
Compensation expense relating to deferred compensation | 368 | 170 | 123
Compensation expense relating to deferred compensation, of which granted in current year | 279 |  |
Estimated unrecognized compensation expense | SFr 125 |  |
Upfront cash award |  |  |
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |
Deferred Compensation Arrangement with Individual, Description | The Bank granted upfront cash awards (UCA) of CHF 321 million, CHF 797 million and CHF 59 million in 2023, 2022 and 2021, respectively. These awards are subject to repayment (clawback) by the employee in the event of voluntary resignation, termination for cause or in connection with other specified events or conditions within three years of the award grant. The amount subject to repayment is reduced in equal monthly installments during the three-year period following the grant date. The expense recognition will occur over the three-year vesting period, subject to service conditions. Amortization of this compensation in 2023 totaled CHF 272 million, of which CHF 105 million was related to awards granted in 2023. |  |
Deferred Compensation Arrangement with Individual, Maximum Contractual Term | 3 years |  |
Compensation expense relating to deferred compensation | SFr 272 |  |
Compensation expense relating to deferred compensation, of which granted in current year | 105 |  |
Upfront cash award | Grant Date, 2023 |  |  |
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount | SFr 321 |  |
Upfront cash award | Grant Date, 2022 |  |  |
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount |  | 797 |
Upfront cash award | Grant Date, 2021 |  |  |
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount |  |  | 59
Deferred cash awards |  |  |
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |
Deferred Compensation Arrangement with Individual, Description | Cash awardsCash awards include certain special awards as well as voluntary deferred compensation plans and employee investment plans. For certain special awards, compensation expense was primarily driven by their vesting schedule; for other cash awards, compensation expense was driven by mark-to-market and performance adjustments, as the majority of the awards are fully vested. |  |
Compensation expense relating to deferred compensation | SFr 659 | 623 | 370
Estimated unrecognized compensation expense | SFr 215 |  |
Deferred fixed cash awards |  |  |
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |
Deferred Compensation Arrangement with Individual, Description | The Bank granted deferred fixed cash compensation of CHF 151 million, CHF 294 million and CHF 259 million in 2023, 2022 and 2021, respectively. This compensation has been expensed over a three-year vesting period from the grant date. Amortization of this compensation in 2023 totaled CHF 167 million, of which CHF 109 million was related to awards granted in 2023. |  |
Deferred Compensation Arrangement with Individual, Maximum Contractual Term | 3 years |  |
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount | SFr 151 | SFr 294 | SFr 259
Compensation expense relating to deferred compensation | 167 |  |
Compensation expense relating to deferred compensation, of which granted in current year | SFr 109 |  |

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