Investment securities - Unrealized losses/fair value (Details 3)
SFr in Millions |
Dec. 31, 2021
CHF (SFr)
|
| Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract] |
|
| Fair value, less than 12 months |
SFr 683
|
| Fair value, 12 months or more |
0
|
| Fair value, total |
683
|
| Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |
|
| Gross unrealized losses, less than 12 months |
8
|
| Gross unrealized losses, 12 months or more |
0
|
| Gross unrealized losses, total |
8
|
| Corporate debt securities |
|
| Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract] |
|
| Fair value, less than 12 months |
683
|
| Fair value, 12 months or more |
0
|
| Fair value, total |
683
|
| Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |
|
| Gross unrealized losses, less than 12 months |
8
|
| Gross unrealized losses, 12 months or more |
0
|
| Gross unrealized losses, total |
8
|
| Bank |
|
| Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract] |
|
| Fair value, less than 12 months |
683
|
| Fair value, 12 months or more |
0
|
| Fair value, total |
683
|
| Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |
|
| Gross unrealized losses, less than 12 months |
8
|
| Gross unrealized losses, 12 months or more |
0
|
| Gross unrealized losses, total |
8
|
| Bank | Corporate debt securities |
|
| Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract] |
|
| Fair value, less than 12 months |
683
|
| Fair value, 12 months or more |
0
|
| Fair value, total |
683
|
| Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |
|
| Gross unrealized losses, less than 12 months |
8
|
| Gross unrealized losses, 12 months or more |
0
|
| Gross unrealized losses, total |
SFr 8
|