Liquidity risk - Assets Pledged as Security (Details) SFr in Millions	12 Months Ended
Dec. 31, 2022 CHF (SFr) creditFacility	Dec. 31, 2021 CHF (SFr)
Disclosure of Financial Risk Management [Abstract]
Number of credit facilities \| creditFacility	3
Trade receivables	SFr 43.4	SFr 23.3
Inventory	234.9	74.0
Assets pledged	SFr 278.3	SFr 97.3

The amount of financial assets that the entity has pledged as collateral for liabilities or contingent liabilities, including amounts that have been reclassified in accordance with paragraph 3.2.23(a) of IFRS 9. [Refer: Contingent liabilities [member]; Financial assets]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 14
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_14_a&doctype=Standard
-URIDate 2022-03-24

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