FINANCIAL INSTRUMENTS & RISK - Interest Rate Risk (Details) - Interest rate risk - CHF (SFr) SFr in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Related party long-term payables | ||
| Changes in % | 0.10% | |
| Effect on profit before tax | SFr 13.0 | SFr 13.0 |