Liquidity risk - Narrative (Details) - CHF (SFr) SFr in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
Jul. 07, 2023 |
|---|---|---|---|
| Disclosure of detailed information about borrowings [line items] | |||
| Accrued expenses | SFr 204.3 | SFr 184.4 | |
| Bank overdraft facility four, CHF | |||
| Disclosure of detailed information about borrowings [line items] | |||
| Credit facility, maximum borrowing capacity | SFr 700.0 | ||
| Line of credit facility option to increase amount | SFr 200.0 | ||
| Initial term of facility agreement | 3 years | ||
| Credit facility extension period | 2 years | ||
| Borrowings | 0.0 | 0.0 | |
| Bank guarantee | SFr 153.2 | SFr 168.3 |