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CECL (Details 6) - CHF (SFr) SFr in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Loans Held At Amortized Cost, Nonaccrual [Line Items] |  |  |
Amortized cost of non-accrual assets | SFr 1,926 | SFr 1,952 | SFr 1,952
Interest income recognized | 32 | 29 |
Amortized cost of non-accrual assets with no specific allowance | SFr 107 | 105 |
Minimum [Member] |  |  |
Loans Held At Amortized Cost, Nonaccrual [Line Items] |  |  |
Write-Down of Loan to Net Book Value Loan Provision Threshold as Percentage of Loan Notional Amount | 90.00% |  |
Corporate and institutional |  |  |
Loans Held At Amortized Cost, Nonaccrual [Line Items] |  |  |
Amortized cost of non-accrual assets | SFr 963 | 1,098 | 913
Interest income recognized | 20 | 18 |
Amortized cost of non-accrual assets with no specific allowance | 56 | 31 |
Corporate and institutional | Real estate |  |  |
Loans Held At Amortized Cost, Nonaccrual [Line Items] |  |  |
Amortized cost of non-accrual assets | 355 | 127 | 167
Interest income recognized | 8 | 1 |
Amortized cost of non-accrual assets with no specific allowance | 7 | 1 |
Corporate and institutional | Commercial and industrial loans |  |  |
Loans Held At Amortized Cost, Nonaccrual [Line Items] |  |  |
Amortized cost of non-accrual assets | 520 | 801 | 686
Interest income recognized | 12 | 9 |
Amortized cost of non-accrual assets with no specific allowance | 48 | 30 |
Corporate and institutional | Financial institutions |  |  |
Loans Held At Amortized Cost, Nonaccrual [Line Items] |  |  |
Amortized cost of non-accrual assets | 77 | 159 | 41
Interest income recognized | 0 | 7 |
Amortized cost of non-accrual assets with no specific allowance | 0 | 0 |
Corporate and institutional | Governments and public institutions |  |  |
Loans Held At Amortized Cost, Nonaccrual [Line Items] |  |  |
Amortized cost of non-accrual assets | 11 | 11 | 19
Interest income recognized | 0 | 1 |
Amortized cost of non-accrual assets with no specific allowance | 1 | 0 |
Consumer |  |  |
Loans Held At Amortized Cost, Nonaccrual [Line Items] |  |  |
Amortized cost of non-accrual assets | 963 | 854 | 1,039
Interest income recognized | 12 | 11 |
Amortized cost of non-accrual assets with no specific allowance | 51 | 74 |
Consumer | Mortgages |  |  |
Loans Held At Amortized Cost, Nonaccrual [Line Items] |  |  |
Amortized cost of non-accrual assets | 462 | 383 | 572
Interest income recognized | 8 | 4 |
Amortized cost of non-accrual assets with no specific allowance | 51 | 64 |
Consumer | Loans collateralized by securities |  |  |
Loans Held At Amortized Cost, Nonaccrual [Line Items] |  |  |
Amortized cost of non-accrual assets | 291 | 283 | 262
Interest income recognized | 0 | 4 |
Amortized cost of non-accrual assets with no specific allowance | 0 | 2 |
Consumer | Consumer finance |  |  |
Loans Held At Amortized Cost, Nonaccrual [Line Items] |  |  |
Amortized cost of non-accrual assets | 210 | 188 | SFr 205
Interest income recognized | 4 | 3 |
Amortized cost of non-accrual assets with no specific allowance | SFr 0 | SFr 8 |

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