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CECL - Financial instruments measured at amortized cost and credit losses (Details 1) - CHF (SFr) SFr in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Overview of financial instruments measured at amortized cost, by balance sheet position [Line Items] |  |
Collateral Dependent Financial Assets, Collateral Coverage Ratio, Recovery Mgt Investment Bank/Asia Pacific | 98.00% | 94.00%
Collateral Dependent Financial Assets, Collateral Coverage Ratio, Recovery Mgt International Wealth Management | 93.00% | 92.00%
Collateral Dependent Financial Assets, Collateral Coverage Ratio, Recovery Mgt Swiss Universal Bank | 84.00% | 88.00%
Accrued interest excluded from amortized cost base of total Financial assets held-at-amortized cost, before allowance of credit losses | SFr 465 | SFr 549
Allowance for credit losses on accrued interest excluded from amortized cost base of total Financial assets held at amortized cost | 0 | 0
Accrued interest excluded from amortized cost base of total Interest-bearing deposits with banks | 1 | 1
Accrued interest excluded from amortized cost base of total Securities purchased under resale agreements and securities borrowing transactions | 3 | 4
Accrued interest excluded from amortized cost base of total Debt securities held-to-maturity | 19 | 10
Accrued interest excluded from amortized cost base of total Loans held at amortized cost | 442 | 534
Financing Receivables,Accrued Interest on Nonaccrual Loans Included | SFr 88 | SFr 102

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