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CECL - Financial instruments measured at amortized cost and credit losses (Details 1) - CHF (SFr) SFr in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
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 | 90.00% | 90.00% |
Collateral Dependent Financial Assets, Collateral Coverage Ratio, Recovery Mgt International Wealth Management | 87.00% | 89.00% |
Collateral Dependent Financial Assets, Collateral Coverage Ratio, Recovery Mgt Swiss Universal Bank | 85.00% | 86.00% |
Accrued interest excluded from amortized cost base of total Financial assets held-at-amortized cost, before allowance of credit losses | SFr 358 |  | SFr 301
Financial Assets, Held-to-Maturity, Cost Practical Expedient, Excluded Accrued Interest [true false] | true |  |
Allowance for credit losses on accrued interest excluded from amortized cost base of total Financial assets held at amortized cost | SFr 0 |  | 0
Accrued interest excluded from amortized cost base of total Interest-bearing deposits with banks |  |  | 1
Interest Bearing Deposits Banks, Practical Expedient, Excluded Accrued Interest [true false] | true |  |
Accrued interest excluded from amortized cost base of total Securities purchased under resale agreements and securities borrowing transactions | SFr 2 |  | 1
Reverse Repos and Securities Borrowing, Practical Expedient, Excluded Accrued Interest [true false] | true |  |
Accrued interest excluded from amortized cost base of total Loans held at amortized cost | SFr 355 |  | 295
Financing Receivable, Practical Expedient, Accrued Interest Exclusion [true false] | true |  |
Accrued interest excluded from amortized cost base of total Brokerage receivables | SFr 1 |  | 4
Brokerage receivables, Practical Expedient, Excluded Accrued Interest [true false] | true |  |
Financing Receivables,Accrued Interest on Nonaccrual Loans Included | SFr 64 |  | 86
Bank |  |  |
Overview of financial instruments measured at amortized cost, by balance sheet position [Line Items] |  |  |
Accrued interest excluded from amortized cost base of total Financial assets held-at-amortized cost, before allowance of credit losses | SFr 358 |  | 301
Financial Assets, Held-to-Maturity, Cost Practical Expedient, Excluded Accrued Interest [true false] | true |  |
Allowance for credit losses on accrued interest excluded from amortized cost base of total Financial assets held at amortized cost | SFr 0 |  | 0
Accrued interest excluded from amortized cost base of total Interest-bearing deposits with banks |  |  | 1
Interest Bearing Deposits Banks, Practical Expedient, Excluded Accrued Interest [true false] | true |  |
Accrued interest excluded from amortized cost base of total Securities purchased under resale agreements and securities borrowing transactions | SFr 2 |  | 1
Reverse Repos and Securities Borrowing, Practical Expedient, Excluded Accrued Interest [true false] | true |  |
Accrued interest excluded from amortized cost base of total Loans held at amortized cost | SFr 355 |  | 295
Financing Receivable, Practical Expedient, Accrued Interest Exclusion [true false] | true |  |
Accrued interest excluded from amortized cost base of total Brokerage receivables | SFr 1 |  | 4
Brokerage receivables, Practical Expedient, Excluded Accrued Interest [true false] | true |  |
Financing Receivables,Accrued Interest on Nonaccrual Loans Included | SFr 63 |  | SFr 85

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- Definition Amount, before allowance for credit loss, of accrued interest on financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 + Details
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