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Employee benefit obligations - Reconciliation of Employee Benefit Obligation (Details) - CHF (SFr) SFr in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Disclosure of defined benefit plans [abstract] |  |
Employee benefit obligations at January 1 | SFr (5.9) | SFr (5.6)
Amounts recognized in income statement | (3.1) | (2.6)
Amounts recognized in other comprehensive income | 4.4 | 0.9
Contributions by the employer | (1.8) | 1.5
Employee benefit obligations at December 31 | SFr (6.3) | SFr (5.9)

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- References No definition available. + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from the remeasurement of that net defined benefit liability (asset). [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 141 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from expense (income) included in profit or loss. [Refer: Net defined benefit liability (asset); Profit (loss)] [Contrast: Post-employment benefit expense in profit or loss, defined benefit plans] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 141 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 140 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_140_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition Decrease (Increase) in Net Defined Benefit Liability Resulting From Resulting From Contributions (Unpaid Contributions) To Plan By Employer + References No definition available. + Details
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