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FI - Fair value, unfunded commitments, term of redemption conditions (Details 12) - CHF (SFr) SFr in Millions	Dec. 31, 2023	Dec. 31, 2022
Schedule of Investments, Fair Value Calculated Using Net Asset Value
Non-redeemable	SFr 480	SFr 514
Redeemable	106	429
Total fair value	586	943
Unfunded commitments	135	177
Investments, Fair Value Calculated Using Net Asset Value, Additional Disclosures
Nonredeemable with known Liquidation Periods	290	276
Nonredeemable with unknown Liquidation Periods	190	238
Redeemable on demand with notice period less than 30 days	63	234
Funds held in trading assets and liabilities
Schedule of Investments, Fair Value Calculated Using Net Asset Value
Non-redeemable	80	128
Redeemable	95	415
Total fair value	175	543
Unfunded commitments	0	14
Funds held in other investments
Schedule of Investments, Fair Value Calculated Using Net Asset Value
Non-redeemable	400	386
Redeemable	11	14
Total fair value	411	400
Unfunded commitments	135	163
Funds held in other investments | Hedge funds
Schedule of Investments, Fair Value Calculated Using Net Asset Value
Non-redeemable	13	13
Redeemable	0	1
Total fair value	13	14
Unfunded commitments	1	1
Funds held in other investments | Private equity funds
Schedule of Investments, Fair Value Calculated Using Net Asset Value
Non-redeemable	88	58
Redeemable	0	0
Total fair value	88	58
Unfunded commitments	52	48
Funds held in other investments | Equity method investments
Schedule of Investments, Fair Value Calculated Using Net Asset Value
Non-redeemable	299	315
Redeemable	11	13
Total fair value	310	328
Unfunded commitments	SFr 82	SFr 114

X

- Definition

For investments that do not have readily determinable fair values, this element represents the portion of the investment that is non-redeemable.

+ References

No definition available.

+ Details

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- References

No definition available.

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- References

No definition available.

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- Definition

For investments that do not have readily determinable fair values, this element represents the portion of the investment that is redeemable.

+ References

No definition available.

+ Details

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- Definition

dup_1_For investments that do not have readily determinable fair values, this element represents the portion of the investment that is redeemable, and is attributable to non-controlling Interest.

+ References

No definition available.

+ Details

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- Definition

Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 35
-Paragraph 54B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482134/820-10-35-54B

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-6A

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- 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.

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- Definition

The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 6A
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-6A

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