Share-based compensation - Schedule of Valuation Inputs (Details) - SFr / shares |
Dec. 15, 2025 |
Oct. 01, 2025 |
Sep. 22, 2025 |
Jun. 23, 2025 |
Mar. 24, 2025 |
Dec. 16, 2024 |
Sep. 23, 2024 |
Jul. 10, 2024 |
Jun. 24, 2024 |
Mar. 25, 2024 |
|---|---|---|---|---|---|---|---|---|---|---|
| RSU and PSU | LTIP 2021 | ||||||||||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||||||||||
| Share price on measurement date (CHF per share) | SFr 38.00 | SFr 36.18 | SFr 43.18 | SFr 42.73 | SFr 51.65 | SFr 42.74 | SFr 32.94 | SFr 34.88 | SFr 31.07 | |
| RSU and PSU | The Board of Directors of On (BoD) 2019 | ||||||||||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||||||||||
| Share price on measurement date (CHF per share) | SFr 38.00 | SFr 36.18 | SFr 43.18 | SFr 42.73 | SFr 51.65 | SFr 42.74 | SFr 34.88 | SFr 31.07 | ||
| Restricted share units (RSU) | LTIP 2021 | ||||||||||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||||||||||
| Share price on measurement date (CHF per share) | SFr 32.65 |