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Litigation (Details) - Pending Litigation SFr in Millions	12 Months Ended
	Dec. 31, 2023 CHF (SFr)
Litigation provisions
Balance at beginning of period	SFr 1,125
Increases in litigation accruals	1,492
Decreases in litigation accruals	(142)
Decreases for settlement and other cash payments	(751)
Reclassification of litigation fees due to policy alignment	(80)
Foreign exchange translation	(134)
Balance at end of period	1,510
Minimum
Litigation provisions
Range of possible losses that are not covered by existing provisions	0
Maximum
Litigation provisions
Range of possible losses that are not covered by existing provisions	SFr 3,200

X

- References

No definition available.

+ Details

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- Definition

The credit to earnings during the period to decrease loss contingency liabilities.

+ References

No definition available.

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- Definition

The charge against earnings in the period to increase loss contingency liabilities.

+ References

No definition available.

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- Definition

The decrease (increase) in loss contingency liabilities for other adjustments not specified elsewhere in the taxonomy, including foreign currency translation.

+ References

No definition available.

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- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483076/450-20-50-1

Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483076/450-20-50-10

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- Definition

Amount of cash outflow reducing loss contingency liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483076/450-20-50-1

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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

No definition available.

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- Definition

The difference between the maximum amount of estimated loss and the amount recorded as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483076/450-20-50-4

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483076/450-20-50-9

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