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CECL (Details 2) - CHF (SFr) SFr in Millions | 6 Months Ended
--- | ---
Jun. 30, 2023 | Jun. 30, 2022
Loans Held At Amortized Cost, Allowance for Credit Losses [Roll Forward] |  |
Loans Held at Amortized Cost, Allowance for Credit Losses, Beginning Balance | SFr 1,362 | SFr 1,296
Current-period provision for expected credit losses | 253 | 135
of which provisions for interest | 47 | 21
Gross write-offs | (79) | (95)
Recoveries | 4 | 7
Net write-offs | (75) | (88)
Foreign currency translation impact and other adjustments, net | (22) | 16
Loans Held at Amortized Cost, Allowance for Credit Losses, Ending Balance | 1,522 | 1,359
of which individually evaluated | 939 | 825
of which collectively evaluated | 583 | 534
Loans held at amortized cost |  |
Purchases | 2,321 | 2,328
Reclassifications from loans held-for-sale | 621 | 95
Reclassifications to loans held-for-sale | 1,312 | 1,480
Sales | 606 | 1,283
Cumulative Effect, Period of Adoption, Adjustment [Member] |  |
Loans Held At Amortized Cost, Allowance for Credit Losses [Roll Forward] |  |
Current-period provision for expected credit losses | 4 |
Corporate and institutional |  |
Loans Held At Amortized Cost, Allowance for Credit Losses [Roll Forward] |  |
Loans Held at Amortized Cost, Allowance for Credit Losses, Beginning Balance |  | 939
Current-period provision for expected credit losses | 172 | 92
of which provisions for interest | 30 | 11
Gross write-offs | (44) | (69)
Recoveries | 0 | 3
Net write-offs | (44) | (66)
Foreign currency translation impact and other adjustments, net | (15) | 11
Loans Held at Amortized Cost, Allowance for Credit Losses, Ending Balance | 1,120 | 976
of which individually evaluated | 664 | 544
of which collectively evaluated | 456 | 432
Loans held at amortized cost |  |
Purchases | 2,302 | 2,312
Reclassifications from loans held-for-sale | 621 | 95
Reclassifications to loans held-for-sale | 1,312 | 1,480
Sales | 606 | 1,283
Consumer |  |
Loans Held At Amortized Cost, Allowance for Credit Losses [Roll Forward] |  |
Loans Held at Amortized Cost, Allowance for Credit Losses, Beginning Balance |  | 357
Current-period provision for expected credit losses | 81 | 43
of which provisions for interest | 17 | 10
Gross write-offs | (35) | (26)
Recoveries | 4 | 4
Net write-offs | (31) | (22)
Foreign currency translation impact and other adjustments, net | (7) | 5
Loans Held at Amortized Cost, Allowance for Credit Losses, Ending Balance | 402 | 383
of which individually evaluated | 275 | 281
of which collectively evaluated | 127 | 102
Loans held at amortized cost |  |
Purchases | 19 | 16
Reclassifications from loans held-for-sale | 0 | 0
Reclassifications to loans held-for-sale | 0 | 0
Sales | SFr 0 | SFr 0

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