Financial liabilities - Narrative (Details) - CHF (SFr) SFr in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of financial liabilities [line items]
Liabilities arising from financing activities	SFr 243.7	SFr 170.0	SFr 187.3
Other, customer refund liabilities
Disclosure of financial liabilities [line items]
Liabilities arising from financing activities	SFr 12.4	SFr 9.5

The amount of liabilities for which cash flows were, or future cash flows will be, classified in the statement of cash flows as cash flows from financing activities. [Refer: Cash flows from (used in) financing activities; Liabilities]

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2023-01-01
-Paragraph 44D
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2023-en-r&anchor=para_44D&doctype=Standard
-URIDate 2023-03-23

Name:	ifrs-full_LiabilitiesArisingFromFinancingActivities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant