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Other investments (Details 2) - CHF (SFr) SFr in Millions | 6 Months Ended
--- | ---
Jun. 30, 2023 | Jun. 30, 2022
Other investments |  |
Impairments and downward adjustments | SFr (66) |
Impairments and downward adjustments, Annual Amount | (12) | SFr (4)
Upward adjustments | 147 |
Upward adjustments, Annual Amount | SFr 0 | SFr 0

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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. This element represents information relating to other investments. + References No definition available. + Details
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- Definition Amount of impairment loss on investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714 + Details
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- Definition Amount of cumulative impairment loss on investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714 + Details
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