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CECL (Details 12) - CHF (SFr) SFr in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Financing Receivable, Recorded Investment [Line Items] |  |  |
Origination in current year | SFr 0 |  | SFr 0
Origination in current year-1 | 9 |  | 7
Origination in current year-2 | 0 |  | 0
Origination in current year-3 | 0 |  | 0
Origination in current year-4 | 0 |  | 47
Origination 5 years or more | 29 |  | 0
Total term positions | 38 |  | 54
Revolving positions | 1,417 |  | 1,711
Other financial assets held at amortized cost, total | 1,455 |  | 1,765
Other financial assets, Gross write-offs | (4,031) | SFr (4) |
Origination In Current Year |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Other financial assets, Gross write-offs | 0 |  |
Origination In Current Year -1 |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Other financial assets, Gross write-offs | 0 |  |
Origination In Current Year -2 |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Other financial assets, Gross write-offs | 0 |  |
Origination In Current Year -3 |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Other financial assets, Gross write-offs | 0 |  |
Origination In Current Year -4 |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Other financial assets, Gross write-offs | 0 |  |
Origination In Current Year -5 or more |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Other financial assets, Gross write-offs | 0 |  |
Total term positions |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Other financial assets, Gross write-offs | 0 |  |
Revolving positions |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Other financial assets, Gross write-offs | 0 |  |
Financing receivable, before Allowance for Credit Loss and Fee |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Other financial assets, Gross write-offs | 0 |  |
Investment grade | AAA to BBB |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Origination in current year | 0 |  | 0
Origination in current year-1 | 0 |  | 0
Origination in current year-2 | 0 |  | 0
Origination in current year-3 | 0 |  | 0
Origination in current year-4 | 0 |  | 0
Origination 5 years or more | 0 |  | 0
Total term positions | 0 |  | 0
Revolving positions | 0 |  | 0
Other financial assets held at amortized cost, total | 0 |  | 0
Non-investment grade | BB to C |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Origination in current year | 0 |  | 0
Origination in current year-1 | 9 |  | 7
Origination in current year-2 | 0 |  | 0
Origination in current year-3 | 0 |  | 0
Origination in current year-4 | 0 |  | 47
Origination 5 years or more | 29 |  | 0
Total term positions | 38 |  | 54
Revolving positions | 1,417 |  | 1,711
Other financial assets held at amortized cost, total | 1,455 |  | 1,765
Non-investment grade | D |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Origination in current year | 0 |  | 0
Origination in current year-1 | 0 |  | 0
Origination in current year-2 | 0 |  | 0
Origination in current year-3 | 0 |  | 0
Origination in current year-4 | 0 |  | 0
Origination 5 years or more | 0 |  | 0
Total term positions | 0 |  | 0
Revolving positions | 0 |  | 0
Other financial assets held at amortized cost, total | SFr 0 |  | SFr 0

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