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Pension and other post-retirement benefits (Details 11) - CHF (SFr) SFr in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Actuarial gains/(losses)
Increase (Decrease) in Accumulated other Comprehensive Income
OCI, before Reclassifications, Net of Tax, Attributable to Parent	SFr (184)	SFr 707	SFr (327)
Net prior service credit/ (cost)
Increase (Decrease) in Accumulated other Comprehensive Income
OCI, before Reclassifications, Net of Tax, Attributable to Parent	(73)	4	(5)
Bank | Actuarial gains/(losses)
Increase (Decrease) in Accumulated other Comprehensive Income
OCI, before Reclassifications, Net of Tax, Attributable to Parent	(170)	12	(55)
Bank | Net prior service credit/ (cost)
Increase (Decrease) in Accumulated other Comprehensive Income
OCI, before Reclassifications, Net of Tax, Attributable to Parent	SFr (4)	SFr 4	SFr (4)

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 15
-URI https://asc.fasb.org/extlink&oid=124507222&loc=d3e1436-108581

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669686-108580

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