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Income taxes - Major Components of Income Tax (Details) - CHF (SFr) SFr in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Taxes [Abstract]
Current income taxes	SFr 38.7	SFr 7.1	SFr 4.1
Deferred income taxes	(18.6)	3.6	(1.0)
Income taxes	SFr 20.2	SFr 10.6	SFr 3.1

- Definition

The aggregate amount included in the determination of profit (loss) for the period in respect of current tax and deferred tax. [Refer: Current tax expense (income); Deferred tax expense (income)]

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