Related parties - Narrative (Details) - CHF (SFr) SFr in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Disclosure of transactions between related parties [line items] | |||
| Share-based compensation | SFr 13.8 | SFr 15.1 | SFr 67.3 |
| Non-executive directors | |||
| Disclosure of transactions between related parties [line items] | |||
| Share-based compensation | SFr 1.1 | SFr 0.5 | SFr 0.3 |