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v3.24.1

Pension and other post-retirement benefits - Plan assets measured at fair value roll-forward (Details 4) - International - CHF (SFr) SFr in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Defined benefit pension plans |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | SFr 2,316 | SFr 3,802
Foreign currency translation impact | (126) | (262)
End of the measurement period | 2,166 | 2,316
Defined benefit pension plans | Debt securities |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | 2,070 |
End of the measurement period | 1,787 | 2,070
Defined benefit pension plans | Corporate debt securities |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | 804 |
End of the measurement period | 757 | 804
Defined benefit pension plans | Government debt securities |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | 1,266 |
End of the measurement period | 1,030 | 1,266
Defined benefit pension plans | Equity securities |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | 106 |
End of the measurement period | 70 | 106
Defined benefit pension plans | Alternative investments |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | (59) |
End of the measurement period | (10) | (59)
Defined benefit pension plans | Other alternative investments |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | (59) |
End of the measurement period | (10) | (59)
Defined benefit pension plans | Other investments, plan assets |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | 81 |
End of the measurement period | 74 | 81
Defined benefit pension plans | Level 3 |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | 0 |
End of the measurement period | 0 | 0
Defined benefit pension plans | Level 3 | Debt securities |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | 0 |
End of the measurement period | 0 | 0
Defined benefit pension plans | Level 3 | Corporate debt securities |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | 0 |
End of the measurement period | 0 | 0
Defined benefit pension plans | Level 3 | Government debt securities |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | 0 |
End of the measurement period | 0 | 0
Defined benefit pension plans | Level 3 | Equity securities |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | 0 |
End of the measurement period | 0 | 0
Defined benefit pension plans | Level 3 | Alternative investments |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | 0 |
End of the measurement period | 0 | 0
Defined benefit pension plans | Level 3 | Other alternative investments |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | 0 |
End of the measurement period | 0 | 0
Defined benefit pension plans | Level 3 | Other investments, plan assets |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | 0 |
End of the measurement period | 0 | 0
Other post-retirement defined benefit plans |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] |  |
Beginning of the measurement period | 0 | 0
Foreign currency translation impact | 0 | 0
End of the measurement period | SFr 0 | SFr 0

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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. + Details
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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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