Investment securities (Details) - CHF (SFr) SFr in Millions |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Investment securities disclosures | ||
| Available-for-sale Securities, Debt Securities | SFr 1,005 | SFr 607 |
| Total investment securities | 1,005 | 607 |
| Bank | ||
| Investment securities disclosures | ||
| Available-for-sale Securities, Debt Securities | 1,003 | 605 |
| Total investment securities | SFr 1,003 | SFr 605 |