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Tax - Balance sheet related (Details 2) - CHF (SFr) SFr in Millions	Jun. 30, 2023	Dec. 31, 2022
Tax effect of temporary differences
Net operating loss carry-forwards, after allocation of valuation allowances	SFr 12	SFr 138
Net deferred tax assets	SFr (95)	SFr (411)

X

- Definition

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

+ References

No definition available.

+ Details

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Namespace Prefix:	cs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319

+ Details

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Period Type:	instant