Financial liabilities - Assets pledged as security (Details) - CHF (SFr) SFr in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of financial liabilities [line items]
Trade receivables	SFr 270.3	SFr 145.8
Inventory	232.9	285.2
Assets pledged	SFr 503.2	SFr 431.0

The amount of inventories pledged as security for liabilities. [Refer: Inventories]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 2
-IssueDate 2023-01-01
-Paragraph 36
-Subparagraph h
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2023-en-r&anchor=para_36_h&doctype=Standard
-URIDate 2023-03-23

Name:	ifrs-full_InventoriesPledgedAsSecurityForLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant