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Derivatives and hedging activities (Details 6) - CHF (SFr) SFr in Billions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Investment securities |  |
Hedged items in fair value hedges [Line Items] |  |
Hedged Asset, Fair Value Hedge | SFr 0.9 | SFr 0.8
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | (0.1) | (0.1)
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) | 0.0 | 0.0
Long-term debt |  |
Hedged items in fair value hedges [Line Items] |  |
Hedged Liability, Fair Value Hedge | 68.4 | 72.0
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) | (0.5) | (1.0)
Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) | (4.5) | (4.4)
Net loans |  |
Hedged items in fair value hedges [Line Items] |  |
Hedged Asset, Fair Value Hedge | 35.7 | 29.0
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | (0.1) | (1.3)
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) | SFr (1.8) | SFr (0.7)

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