FINANCIAL INSTRUMENTS & RISK - Foreign Currency Sensitivity (Details) - Currency risk - CHF (SFr) SFr in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Euro | ||
| Related party long-term payables | ||
| Changes in % | 10.00% | |
| Effect on profit before tax | SFr 160.1 | SFr 177.4 |
| US Dollar | ||
| Related party long-term payables | ||
| Changes in % | 10.00% | |
| Effect on profit before tax | SFr 278.6 | SFr 380.4 |