INCOME TAXES - Reconciliation Of Accounting Profit Multiplied By Applicable Tax Rates And Average Effective Tax Rate (Details) - CHF (SFr) SFr in Millions |
12 Months Ended | ||
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Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Income Taxes [Abstract] | |||
| Income (loss) before income taxes | SFr (128.4) | SFr (378.5) | SFr (372.1) |
| Domestic income tax rate | 18.30% | 18.30% | 18.40% |
| Expected income tax benefit /(expense) | SFr 23.5 | SFr 69.4 | SFr 68.4 |
| Effect of income taxed at differing tax rates | (4.2) | 5.0 | (3.7) |
| Non-deductible items | (0.6) | (18.4) | (9.9) |
| Non-taxable income | 0.0 | 0.0 | 0.1 |
| Effect of changes in recognition of deferred tax assets | (0.6) | (0.6) | 3.2 |
| Adjustments to deferred tax balances arising from tax rate changes | 0.7 | 0.0 | 0.5 |
| Adjustments recognised for current and deferred tax of prior periods | 0.8 | (40.3) | 1.0 |
| Other effects | 0.3 | 1.6 | 0.3 |
| Total income tax benefit | SFr 19.9 | SFr 16.7 | SFr 59.9 |
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- Definition The amount of profit (loss) for a period before deducting tax expense. [Refer: Profit (loss)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The applicable income tax rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that the entity does not separately disclose in the same statement or note. [Refer: Accounting profit; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to changes in the tax rate. [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to expenses not deductible in determining taxable profit (tax loss). [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to foreign tax rates. [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to revenues that are exempt from taxation. [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The product of the accounting profit multiplied by the applicable tax rate(s). [Refer: Accounting profit; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Income taxes [Abstract] No definition available.
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- Definition Tax Effect Of Deferred Tax Assets No definition available.
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- Definition Tax Effect Of Prior Year Income Taxes No definition available.
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