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Estimated unrecognized deferred compensation (Details 2) SFr in Millions	12 Months Ended
	Dec. 31, 2023 CHF (SFr)
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	SFr 512
Aggregate remaining weighted-average requisite service period (years)
Aggregate remaining requisite service period (in years)	1 year 3 months 18 days
Deferred cash awards
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	SFr 215
Retention Awards
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	125
Performance shares | Performance share awards
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	4
Stock compensation plan | Share awards
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	100
Stock compensation plan | Strategic Delivery Plan
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	SFr 23

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- References

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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