CECL (Details 9) - CHF (SFr) SFr in Millions |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Financing Receivable, Recorded Investment, Past Due [Line Items] | ||
| Other financial assets held at amortized cost, past due | SFr 0 | SFr 0 |
| Other financial assets held at amortized cost, total | 1,042 | 1,010 |
| Bank | ||
| Financing Receivable, Recorded Investment, Past Due [Line Items] | ||
| Other financial assets held at amortized cost, total | SFr 1,042 | SFr 1,010 |