Income taxes (Tables)

6 Months Ended

Jun. 30, 2026

Income Taxes [Abstract]

Schedule of Income Tax Expense


						Three-month period ended June 30,												Six-month period ended June 30,
(CHF in millions)						2026						2025						2026						2025


Current income tax expense						(27.3)						(29.3)						(48.4)						(51.8)
Deferred income tax benefit						6.6						35.7						14.9						50.9
Income tax (expense) / benefit						(20.7)						6.4						(33.5)						(0.8)