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FI - Own credit gains/(losses) on fair value option elected instruments (Details 17) - CHF (SFr) SFr in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Financial instruments
Gains/(losses) recorded into AOCI	SFr 3,700	SFr 6,863
Gains/(losses) recorded into AOCI, Cumulatively	(828)
Gains/(losses) recorded into AOCI transferred to net income	(9,161)	(31)
Due to banks and customer deposits
Financial instruments
Gains/(losses) recorded into AOCI	(32)	57
Gains/(losses) recorded into AOCI, Cumulatively	(31)
Gains/(losses) recorded into AOCI transferred to net income	0	0
Short-term borrowings
Financial instruments
Gains/(losses) recorded into AOCI	(21)	19
Gains/(losses) recorded into AOCI, Cumulatively	(47)
Gains/(losses) recorded into AOCI transferred to net income	1	0
Long-term debt
Financial instruments
Gains/(losses) recorded into AOCI	3,753	6,787
Gains/(losses) recorded into AOCI, Cumulatively	(750)
Gains/(losses) recorded into AOCI transferred to net income	(9,162)	(31)
Long-term debt - of which structured notes over two years
Financial instruments
Gains/(losses) recorded into AOCI	(2,094)	2,667
Gains/(losses) recorded into AOCI, Cumulatively	(672)
Gains/(losses) recorded into AOCI transferred to net income	(137)	(31)
Long-term debt - of which treasury debt over two years
Financial instruments
Gains/(losses) recorded into AOCI	6,406	3,522
Gains/(losses) recorded into AOCI, Cumulatively	3
Gains/(losses) recorded into AOCI transferred to net income	SFr (9,025)	SFr 0

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- Definition

Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for unrealized gain (loss) from increase (decrease) in instrument-specific credit risk, realized upon derecognition of financial liability measured under fair value option.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482790/220-10-45-11

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
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-Name Accounting Standards Codification
-Section 45
-Paragraph 10A
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-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
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-Paragraph 15
-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
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-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-30

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 17A
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482790/220-10-45-17A

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-30

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Amount, before tax and reclassification adjustment, of unrealized gain (loss) from increase (decrease) in instrument-specific credit risk of financial liability measured under fair value option.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482790/220-10-45-11

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 10A
-Subparagraph (l)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482790/220-10-45-10A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482736/825-10-45-5

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-30

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