Inventories - Narrative (Details) - CHF (SFr) SFr in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Disclosure Of Inventory [Line Items] | ||
| Consignment inventory | SFr 4.0 | SFr 12.6 |
| Cost of sales | ||
| Disclosure Of Inventory [Line Items] | ||
| Cost of inventories recognised as expense during period | 549.6 | 384.8 |
| Write-downs (reversals of write-downs) of inventories | SFr 6.3 | SFr 0.6 |