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Revenue from contracts with customers (Details) - CHF (SFr) SFr in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	SFr 7,404	SFr 11,274	SFr 10,225
Other securities business [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	61	56	66
Underwriting [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	491	2,493	2,255
Brokerage [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,264	3,067	3,242
Investment Advice [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,079	3,497	3,187
Service, Other [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,509	2,161	1,475
Bank
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	7,479	11,353	10,317
Bank | Other securities business [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	61	61	73
Bank | Underwriting [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	560	2,560	2,348
Bank | Brokerage [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,264	3,087	3,243
Bank | Investment Advice [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,028	3,401	3,087
Bank | Service, Other [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	SFr 1,566	SFr 2,244	SFr 1,566

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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