Pensions and Other Post Employment Benefit Plans - Summary of Components of Net Benefit Expense (Details) - CHF (SFr) SFr in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Disclosure of defined benefit plans [abstract] | ||||
| Total | SFr 333 | SFr 26 | SFr 39 | SFr 613 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The amount of other comprehensive income, net of tax, related to gains (losses) on remeasurements of defined benefit plans, which comprise actuarial gains and losses; the return on plan assets, excluding amounts included in net interest on the net defined benefit liability (asset); and any change in the effect of the asset ceiling, excluding amounts included in net interest on the net defined benefit liability (asset). [Refer: Other comprehensive income; Defined benefit plans [domain]; Plan assets [member]; Net defined benefit liability (asset)] [Contrast: Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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