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CECL (Details 5) - Debt securities issued by foreign governments SFr in Millions	12 Months Ended
	Dec. 31, 2022 CHF (SFr)
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Purchases	SFr 971
Bank
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Purchases	SFr 971

X

- Definition

Amount of increase from purchase of debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 11
-Subparagraph (h)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919244-210447

+ Details

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Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Details

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Namespace Prefix:
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Balance Type:
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X

- Details

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Namespace Prefix:
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