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Transfers of financial assets (TFA) - Securitizations (Details) - CHF (SFr) SFr in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
CMBS |  |  |
Transfers of financial assets disclosures |  |  |
Net gain/(loss) | SFr 0 | SFr 6 | SFr (7)
Proceeds from transfer of assets | 0 | 3,401 | 3,525
Cash received on interests that continue to be held | 18 | 49 | 42
Cash flows between transferee and transferor non cash proceeds from new transfers | 0 | 512 | 180
RMBS |  |  |
Transfers of financial assets disclosures |  |  |
Net gain/(loss) | 0 | (2) | 70
Proceeds from transfer of assets | 0 | 7,534 | 37,048
Purchases of previously transferred financial assets or their underlying collateral | 0 | 0 | (1,604)
Servicing fees | 12 | 24 | 2
Cash received on interests that continue to be held | 51 | 675 | 1,088
Cash flows between transferee and transferor non cash proceeds from new transfers | 0 | 1,081 | 3,072
Other asset-backed financings |  |  |
Transfers of financial assets disclosures |  |  |
Net gain/(loss) | 7 | 16 | 65
Proceeds from transfer of assets | 7,008 | 6,740 | 12,129
Purchases of previously transferred financial assets or their underlying collateral | (232) | (1,479) | (1,323)
Servicing fees | 217 | 192 | 165
Cash received on interests that continue to be held | 301 | 153 | 14
Cash flows between transferee and transferor non cash proceeds from new transfers | SFr 4,186 | SFr 168 | SFr 54

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- Definition Non-cash beneficial interest (including risk retention securities) included in the total proceeds from transfer of assets + References No definition available. + Details
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- Definition Cash Flows between a transferor and a transferee attributable to newly transferred assets related to either a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481326/860-20-50-3 + Details
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- Definition Cash Flows between a transferor and a transferee attributable to purchases of previously transferred financial assets (or its underlying collateral) related to a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481326/860-20-50-3 + Details
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- Definition Cash flows between transferor and transferee in payment of service fees in advance, prior to or in contemplation of a securitization, asset-backed financing arrangement, or similar transfer in which the transferor will have continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d)(4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481326/860-20-50-3 + Details
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- Definition Cash Flows between a transferee and a transferor attributable to servicing fees related to a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d)(4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481326/860-20-50-3 + Details
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- Definition Reflects, by transferred financial asset type, the amount of sales proceeds in excess of or deficient from the sum of the carrying amounts of transferred financial assets plus transaction costs, including those transactions in which the seller/transferor has continuing involvement with the financial assets that have been transferred. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481326/860-20-50-3 + Details
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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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481326/860-20-50-3 + Details
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