Property, plant and equipment - Narrative (Details) - CHF (SFr) SFr in Millions |
6 Months Ended | ||
|---|---|---|---|
Jun. 30, 2024 |
Jun. 30, 2023 |
Dec. 31, 2023 |
|
| Disclosure of detailed information about property, plant and equipment [line items] | |||
| Additions | SFr 30.5 | SFr 19.0 | |
| Non-cash additions of property, plant and equipment | 6.8 | 0.0 | |
| Other | |||
| Disclosure of detailed information about property, plant and equipment [line items] | |||
| Additions | 3.5 | SFr 2.1 | |
| Other, fixed assets not yet in use | SFr 3.9 | SFr 2.4 | |