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CECL (Details 10) - CHF (SFr)
SFr in Millions
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year SFr 34,717   SFr 75,886
Origination in current year-1 57,172   33,920
Origination in current year-2 28,752   23,356
Origination in current year-3 20,401   14,069
Origination in current year-4 12,547   8,677
Origination in current year-5 or more 52,907   49,714
Total term loans 206,496   205,622
Revolving loans 71,411   77,199
Financing Receivable, before Allowance for Credit Loss and Fee 277,907 SFr 279,548 282,821
Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 21,088   53,305
Origination in current year-1 43,560   25,119
Origination in current year-2 21,698   16,367
Origination in current year-3 14,602   9,913
Origination in current year-4 9,271   6,681
Origination in current year-5 or more 45,391   42,787
Total term loans 155,610   154,172
Revolving loans 58,537   64,192
Financing Receivable, before Allowance for Credit Loss and Fee 214,147   218,364
Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 13,314   22,347
Origination in current year-1 13,465   8,676
Origination in current year-2 6,961   6,795
Origination in current year-3 5,500   3,765
Origination in current year-4 3,113   1,849
Origination in current year-5 or more 6,912   6,446
Total term loans 49,265   49,878
Revolving loans 11,934   12,254
Financing Receivable, before Allowance for Credit Loss and Fee 61,199   62,132
Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 315   234
Origination in current year-1 147   125
Origination in current year-2 93   194
Origination in current year-3 299   391
Origination in current year-4 163   147
Origination in current year-5 or more 604   481
Total term loans 1,621   1,572
Revolving loans 940   753
Financing Receivable, before Allowance for Credit Loss and Fee 2,561   2,325
Corporate and institutional      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 23,681   43,627
Origination in current year-1 28,849   15,424
Origination in current year-2 11,691   9,595
Origination in current year-3 7,592   5,433
Origination in current year-4 4,603   2,404
Origination in current year-5 or more 10,217   8,631
Total term loans 86,633   85,114
Revolving loans 30,826   31,041
Financing Receivable, before Allowance for Credit Loss and Fee 117,459   116,155
Corporate and institutional | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 12,587   24,733
Origination in current year-1 17,902   9,189
Origination in current year-2 6,954   4,713
Origination in current year-3 3,676   2,496
Origination in current year-4 2,273   1,287
Origination in current year-5 or more 5,942   5,180
Total term loans 49,334   47,598
Revolving loans 21,990   22,293
Financing Receivable, before Allowance for Credit Loss and Fee 71,324   69,891
Corporate and institutional | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 10,781   18,705
Origination in current year-1 10,846   6,138
Origination in current year-2 4,691   4,755
Origination in current year-3 3,709   2,758
Origination in current year-4 2,241   1,057
Origination in current year-5 or more 4,047   3,330
Total term loans 36,315   36,743
Revolving loans 8,222   8,240
Financing Receivable, before Allowance for Credit Loss and Fee 44,537   44,983
Corporate and institutional | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 313   189
Origination in current year-1 101   97
Origination in current year-2 46   127
Origination in current year-3 207   179
Origination in current year-4 89   60
Origination in current year-5 or more 228   121
Total term loans 984   773
Revolving loans 614   508
Financing Receivable, before Allowance for Credit Loss and Fee 1,598   1,281
Corporate and institutional | Real estate      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 3,930   14,252
Origination in current year-1 11,485   5,069
Origination in current year-2 4,411   2,557
Origination in current year-3 1,839   1,266
Origination in current year-4 1,163   576
Origination in current year-5 or more 2,890   2,875
Total term loans 25,718   26,595
Revolving loans 987   1,210
Financing Receivable, before Allowance for Credit Loss and Fee 26,705   27,805
Corporate and institutional | Real estate | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 2,328   9,568
Origination in current year-1 8,356   3,709
Origination in current year-2 3,476   1,849
Origination in current year-3 1,227   925
Origination in current year-4 878   475
Origination in current year-5 or more 2,506   2,469
Total term loans 18,771   18,995
Revolving loans 635   778
Financing Receivable, before Allowance for Credit Loss and Fee 19,406   19,773
Corporate and institutional | Real estate | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,602   4,682
Origination in current year-1 3,128   1,355
Origination in current year-2 931   706
Origination in current year-3 583   340
Origination in current year-4 284   101
Origination in current year-5 or more 361   376
Total term loans 6,889   7,560
Revolving loans 223   297
Financing Receivable, before Allowance for Credit Loss and Fee 7,112   7,857
Corporate and institutional | Real estate | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 0   2
Origination in current year-1 1   5
Origination in current year-2 4   2
Origination in current year-3 29   1
Origination in current year-4 1   0
Origination in current year-5 or more 23   30
Total term loans 58   40
Revolving loans 129   135
Financing Receivable, before Allowance for Credit Loss and Fee 187   175
Corporate and institutional | Commercial and industrial loans      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 14,291   20,405
Origination in current year-1 10,871   7,772
Origination in current year-2 5,522   6,118
Origination in current year-3 5,104   3,436
Origination in current year-4 2,750   1,694
Origination in current year-5 or more 6,028   4,951
Total term loans 44,566   44,376
Revolving loans 20,567   21,771
Financing Receivable, before Allowance for Credit Loss and Fee 65,133   66,147
Corporate and institutional | Commercial and industrial loans | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 5,697   8,284
Origination in current year-1 4,437   3,242
Origination in current year-2 2,024   2,110
Origination in current year-3 1,865   1,003
Origination in current year-4 808   697
Origination in current year-5 or more 2,228   2,013
Total term loans 17,059   17,349
Revolving loans 12,877   13,941
Financing Receivable, before Allowance for Credit Loss and Fee 29,936   31,290
Corporate and institutional | Commercial and industrial loans | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 8,373   11,985
Origination in current year-1 6,334   4,468
Origination in current year-2 3,456   3,903
Origination in current year-3 3,073   2,256
Origination in current year-4 1,855   937
Origination in current year-5 or more 3,595   2,848
Total term loans 26,686   26,397
Revolving loans 7,342   7,458
Financing Receivable, before Allowance for Credit Loss and Fee 34,028   33,855
Corporate and institutional | Commercial and industrial loans | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 221   136
Origination in current year-1 100   62
Origination in current year-2 42   105
Origination in current year-3 166   177
Origination in current year-4 87   60
Origination in current year-5 or more 205   90
Total term loans 821   630
Revolving loans 348   372
Financing Receivable, before Allowance for Credit Loss and Fee 1,169   1,002
Corporate and institutional | Financial institutions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 5,388   8,423
Origination in current year-1 5,484   2,312
Origination in current year-2 1,470   788
Origination in current year-3 535   674
Origination in current year-4 635   106
Origination in current year-5 or more 1,072   585
Total term loans 14,584   12,888
Revolving loans 9,199   8,028
Financing Receivable, before Allowance for Credit Loss and Fee 23,783   20,916
Corporate and institutional | Financial institutions | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 4,507   6,360
Origination in current year-1 4,131   2,081
Origination in current year-2 1,294   660
Origination in current year-3 482   522
Origination in current year-4 532   87
Origination in current year-5 or more 1,001   499
Total term loans 11,947   10,209
Revolving loans 8,405   7,542
Financing Receivable, before Allowance for Credit Loss and Fee 20,352   17,751
Corporate and institutional | Financial institutions | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 789   2,012
Origination in current year-1 1,353   201
Origination in current year-2 176   127
Origination in current year-3 52   151
Origination in current year-4 102   19
Origination in current year-5 or more 71   85
Total term loans 2,543   2,595
Revolving loans 657   485
Financing Receivable, before Allowance for Credit Loss and Fee 3,200   3,080
Corporate and institutional | Financial institutions | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 92   51
Origination in current year-1 0   30
Origination in current year-2 0   1
Origination in current year-3 1   1
Origination in current year-4 1   0
Origination in current year-5 or more 0   1
Total term loans 94   84
Revolving loans 137   1
Financing Receivable, before Allowance for Credit Loss and Fee 231   85
Corporate and institutional | Governments and public institutions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 72   547
Origination in current year-1 1,009   271
Origination in current year-2 288   132
Origination in current year-3 114   57
Origination in current year-4 55   28
Origination in current year-5 or more 227   220
Total term loans 1,765   1,255
Revolving loans 73   32
Financing Receivable, before Allowance for Credit Loss and Fee 1,838   1,287
Corporate and institutional | Governments and public institutions | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 55   521
Origination in current year-1 978   157
Origination in current year-2 160   94
Origination in current year-3 102   46
Origination in current year-4 55   28
Origination in current year-5 or more 207   199
Total term loans 1,557   1,045
Revolving loans 73   32
Financing Receivable, before Allowance for Credit Loss and Fee 1,630   1,077
Corporate and institutional | Governments and public institutions | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 17   26
Origination in current year-1 31   114
Origination in current year-2 128   19
Origination in current year-3 1   11
Origination in current year-4 0   0
Origination in current year-5 or more 20   21
Total term loans 197   191
Revolving loans 0   0
Financing Receivable, before Allowance for Credit Loss and Fee 197   191
Corporate and institutional | Governments and public institutions | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 0   0
Origination in current year-1 0   0
Origination in current year-2 0   19
Origination in current year-3 11   0
Origination in current year-4 0   0
Origination in current year-5 or more 0   0
Total term loans 11   19
Revolving loans 0   0
Financing Receivable, before Allowance for Credit Loss and Fee 11   19
Consumer      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 11,036   32,259
Origination in current year-1 28,323   18,496
Origination in current year-2 17,061   13,761
Origination in current year-3 12,809   8,636
Origination in current year-4 7,944   6,273
Origination in current year-5 or more 42,690   41,083
Total term loans 119,863   120,508
Revolving loans 40,585   46,158
Financing Receivable, before Allowance for Credit Loss and Fee 160,448   166,666
Consumer | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 8,501   28,572
Origination in current year-1 25,658   15,930
Origination in current year-2 14,744   11,654
Origination in current year-3 10,926   7,417
Origination in current year-4 6,998   5,394
Origination in current year-5 or more 39,449   37,607
Total term loans 106,276   106,574
Revolving loans 36,547   41,899
Financing Receivable, before Allowance for Credit Loss and Fee 142,823   148,473
Consumer | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 2,533   3,642
Origination in current year-1 2,619   2,538
Origination in current year-2 2,270   2,040
Origination in current year-3 1,791   1,007
Origination in current year-4 872   792
Origination in current year-5 or more 2,865   3,116
Total term loans 12,950   13,135
Revolving loans 3,712   4,014
Financing Receivable, before Allowance for Credit Loss and Fee 16,662   17,149
Consumer | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 2   45
Origination in current year-1 46   28
Origination in current year-2 47   67
Origination in current year-3 92   212
Origination in current year-4 74   87
Origination in current year-5 or more 376   360
Total term loans 637   799
Revolving loans 326   245
Financing Receivable, before Allowance for Credit Loss and Fee 963   1,044
Consumer | Mortgages      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 7,286   26,431
Origination in current year-1 24,734   16,158
Origination in current year-2 15,147   12,995
Origination in current year-3 12,178   8,187
Origination in current year-4 7,708   6,090
Origination in current year-5 or more 41,240   39,466
Total term loans 108,293   109,327
Revolving loans 1,190   1,206
Financing Receivable, before Allowance for Credit Loss and Fee 109,483   110,533
Consumer | Mortgages | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 6,131   24,257
Origination in current year-1 22,988   14,743
Origination in current year-2 13,880   11,308
Origination in current year-3 10,677   7,287
Origination in current year-4 6,929   5,318
Origination in current year-5 or more 38,422   36,790
Total term loans 99,027   99,703
Revolving loans 317   276
Financing Receivable, before Allowance for Credit Loss and Fee 99,344   99,979
Consumer | Mortgages | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,154   2,134
Origination in current year-1 1,711   1,402
Origination in current year-2 1,235   1,639
Origination in current year-3 1,427   812
Origination in current year-4 721   698
Origination in current year-5 or more 2,491   2,359
Total term loans 8,739   9,044
Revolving loans 873   930
Financing Receivable, before Allowance for Credit Loss and Fee 9,612   9,974
Consumer | Mortgages | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1   40
Origination in current year-1 35   13
Origination in current year-2 32   48
Origination in current year-3 74   88
Origination in current year-4 58   74
Origination in current year-5 or more 327   317
Total term loans 527   580
Revolving loans 0   0
Financing Receivable, before Allowance for Credit Loss and Fee 527   580
Consumer | Loans collateralized by securities      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,765   3,312
Origination in current year-1 2,191   1,497
Origination in current year-2 1,256   228
Origination in current year-3 218   164
Origination in current year-4 43   74
Origination in current year-5 or more 1,265   1,485
Total term loans 6,738   6,760
Revolving loans 38,920   44,493
Financing Receivable, before Allowance for Credit Loss and Fee 45,658   51,253
Consumer | Loans collateralized by securities | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,057   2,627
Origination in current year-1 1,800   649
Origination in current year-2 467   61
Origination in current year-3 70   32
Origination in current year-4 18   55
Origination in current year-5 or more 1,007   804
Total term loans 4,419   4,228
Revolving loans 35,899   41,275
Financing Receivable, before Allowance for Credit Loss and Fee 40,318   45,503
Consumer | Loans collateralized by securities | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 708   685
Origination in current year-1 391   848
Origination in current year-2 789   167
Origination in current year-3 148   26
Origination in current year-4 25   19
Origination in current year-5 or more 258   681
Total term loans 2,319   2,426
Revolving loans 2,783   3,063
Financing Receivable, before Allowance for Credit Loss and Fee 5,102   5,489
Consumer | Loans collateralized by securities | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [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   106
Origination in current year-4 0   0
Origination in current year-5 or more 0   0
Total term loans 0   106
Revolving loans 238   155
Financing Receivable, before Allowance for Credit Loss and Fee 238   261
Consumer | Consumer finance      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,985   2,516
Origination in current year-1 1,398   841
Origination in current year-2 658   538
Origination in current year-3 413   285
Origination in current year-4 193   109
Origination in current year-5 or more 185   132
Total term loans 4,832   4,421
Revolving loans 475   459
Financing Receivable, before Allowance for Credit Loss and Fee 5,307   4,880
Consumer | Consumer finance | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,313   1,688
Origination in current year-1 870   538
Origination in current year-2 397   285
Origination in current year-3 179   98
Origination in current year-4 51   21
Origination in current year-5 or more 20   13
Total term loans 2,830   2,643
Revolving loans 331   348
Financing Receivable, before Allowance for Credit Loss and Fee 3,161   2,991
Consumer | Consumer finance | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 671   823
Origination in current year-1 517   288
Origination in current year-2 246   234
Origination in current year-3 216   169
Origination in current year-4 126   75
Origination in current year-5 or more 116   76
Total term loans 1,892   1,665
Revolving loans 56   21
Financing Receivable, before Allowance for Credit Loss and Fee 1,948   1,686
Consumer | Consumer finance | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1   5
Origination in current year-1 11   15
Origination in current year-2 15   19
Origination in current year-3 18   18
Origination in current year-4 16   13
Origination in current year-5 or more 49   43
Total term loans 110   113
Revolving loans 88   90
Financing Receivable, before Allowance for Credit Loss and Fee 198   203
Bank      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 34,717   75,886
Origination in current year-1 57,172   33,920
Origination in current year-2 28,752   23,356
Origination in current year-3 20,401   14,069
Origination in current year-4 12,547   8,677
Origination in current year-5 or more 52,896   49,702
Total term loans 206,485   205,610
Revolving loans 71,411   77,199
Financing Receivable, before Allowance for Credit Loss and Fee 286,338   291,492
Bank | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 21,088   53,305
Origination in current year-1 43,560   25,119
Origination in current year-2 21,698   16,367
Origination in current year-3 14,602   9,913
Origination in current year-4 9,271   6,681
Origination in current year-5 or more 45,391   42,787
Total term loans 155,610   154,172
Revolving loans 58,537   64,192
Financing Receivable, before Allowance for Credit Loss and Fee 222,572   227,047
Bank | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 13,314   22,347
Origination in current year-1 13,465   8,676
Origination in current year-2 6,961   6,795
Origination in current year-3 5,500   3,765
Origination in current year-4 3,113   1,849
Origination in current year-5 or more 6,912   6,446
Total term loans 49,265   49,878
Revolving loans 11,934   12,254
Financing Receivable, before Allowance for Credit Loss and Fee 61,216   62,132
Bank | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 315   234
Origination in current year-1 147   125
Origination in current year-2 93   194
Origination in current year-3 299   391
Origination in current year-4 163   147
Origination in current year-5 or more 593   469
Total term loans 1,610   1,560
Revolving loans 940   753
Financing Receivable, before Allowance for Credit Loss and Fee 2,550   2,313
Bank | Corporate and institutional      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 23,681   43,627
Origination in current year-1 28,849   15,424
Origination in current year-2 11,691   9,595
Origination in current year-3 7,592   5,433
Origination in current year-4 4,603   2,404
Origination in current year-5 or more 10,206   8,619
Total term loans 86,622   85,102
Revolving loans 30,826   31,041
Financing Receivable, before Allowance for Credit Loss and Fee 117,448   116,143
Bank | Corporate and institutional | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 12,587   24,733
Origination in current year-1 17,902   9,189
Origination in current year-2 6,954   4,713
Origination in current year-3 3,676   2,496
Origination in current year-4 2,273   1,287
Origination in current year-5 or more 5,942   5,180
Total term loans 49,334   47,598
Revolving loans 21,990   22,293
Financing Receivable, before Allowance for Credit Loss and Fee 71,324   69,891
Bank | Corporate and institutional | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 10,781   18,705
Origination in current year-1 10,846   6,138
Origination in current year-2 4,691   4,755
Origination in current year-3 3,709   2,758
Origination in current year-4 2,241   1,057
Origination in current year-5 or more 4,047   3,330
Total term loans 36,315   36,743
Revolving loans 8,222   8,240
Financing Receivable, before Allowance for Credit Loss and Fee 44,537   44,983
Bank | Corporate and institutional | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 313   189
Origination in current year-1 101   97
Origination in current year-2 46   127
Origination in current year-3 207   179
Origination in current year-4 89   60
Origination in current year-5 or more 217   109
Total term loans 973   761
Revolving loans 614   508
Financing Receivable, before Allowance for Credit Loss and Fee 1,587   1,269
Bank | Corporate and institutional | Real estate      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 3,930   14,252
Origination in current year-1 11,485   5,069
Origination in current year-2 4,411   2,557
Origination in current year-3 1,839   1,266
Origination in current year-4 1,163   576
Origination in current year-5 or more 2,890   2,875
Total term loans 25,718   26,595
Revolving loans 987   1,210
Financing Receivable, before Allowance for Credit Loss and Fee 26,705   27,805
Bank | Corporate and institutional | Real estate | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 2,328   9,568
Origination in current year-1 8,356   3,709
Origination in current year-2 3,476   1,849
Origination in current year-3 1,227   925
Origination in current year-4 878   475
Origination in current year-5 or more 2,506   2,469
Total term loans 18,771   18,995
Revolving loans 635   778
Financing Receivable, before Allowance for Credit Loss and Fee 19,406   19,773
Bank | Corporate and institutional | Real estate | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,602   4,682
Origination in current year-1 3,128   1,355
Origination in current year-2 931   706
Origination in current year-3 583   340
Origination in current year-4 284   101
Origination in current year-5 or more 361   376
Total term loans 6,889   7,560
Revolving loans 223   297
Financing Receivable, before Allowance for Credit Loss and Fee 7,112   7,857
Bank | Corporate and institutional | Real estate | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 0   2
Origination in current year-1 1   5
Origination in current year-2 4   2
Origination in current year-3 29   1
Origination in current year-4 1   0
Origination in current year-5 or more 23   30
Total term loans 58   40
Revolving loans 129   135
Financing Receivable, before Allowance for Credit Loss and Fee 187   175
Bank | Corporate and institutional | Commercial and industrial loans      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 14,291   20,405
Origination in current year-1 10,871   7,772
Origination in current year-2 5,522   6,118
Origination in current year-3 5,104   3,436
Origination in current year-4 2,750   1,694
Origination in current year-5 or more 6,017   4,939
Total term loans 44,555   44,364
Revolving loans 20,567   21,771
Financing Receivable, before Allowance for Credit Loss and Fee 65,122   66,135
Bank | Corporate and institutional | Commercial and industrial loans | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 5,697   8,284
Origination in current year-1 4,437   3,242
Origination in current year-2 2,024   2,110
Origination in current year-3 1,865   1,003
Origination in current year-4 808   697
Origination in current year-5 or more 2,228   2,013
Total term loans 17,059   17,349
Revolving loans 12,877   13,941
Financing Receivable, before Allowance for Credit Loss and Fee 29,936   31,290
Bank | Corporate and institutional | Commercial and industrial loans | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 8,373   11,985
Origination in current year-1 6,334   4,468
Origination in current year-2 3,456   3,903
Origination in current year-3 3,073   2,256
Origination in current year-4 1,855   937
Origination in current year-5 or more 3,595   2,848
Total term loans 26,686   26,397
Revolving loans 7,342   7,458
Financing Receivable, before Allowance for Credit Loss and Fee 34,028   33,855
Bank | Corporate and institutional | Commercial and industrial loans | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 221   136
Origination in current year-1 100   62
Origination in current year-2 42   105
Origination in current year-3 166   177
Origination in current year-4 87   60
Origination in current year-5 or more 194   78
Total term loans 810   618
Revolving loans 348   372
Financing Receivable, before Allowance for Credit Loss and Fee 1,158   990
Bank | Corporate and institutional | Financial institutions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 5,388   8,423
Origination in current year-1 5,484   2,312
Origination in current year-2 1,470   788
Origination in current year-3 535   674
Origination in current year-4 635   106
Origination in current year-5 or more 1,072   585
Total term loans 14,584   12,888
Revolving loans 9,199   8,028
Financing Receivable, before Allowance for Credit Loss and Fee 23,783   20,916
Bank | Corporate and institutional | Financial institutions | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 4,507   6,360
Origination in current year-1 4,131   2,081
Origination in current year-2 1,294   660
Origination in current year-3 482   522
Origination in current year-4 532   87
Origination in current year-5 or more 1,001   499
Total term loans 11,947   10,209
Revolving loans 8,405   7,542
Financing Receivable, before Allowance for Credit Loss and Fee 20,352   17,751
Bank | Corporate and institutional | Financial institutions | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 789   2,012
Origination in current year-1 1,353   201
Origination in current year-2 176   127
Origination in current year-3 52   151
Origination in current year-4 102   19
Origination in current year-5 or more 71   85
Total term loans 2,543   2,595
Revolving loans 657   485
Financing Receivable, before Allowance for Credit Loss and Fee 3,200   3,080
Bank | Corporate and institutional | Financial institutions | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 92   51
Origination in current year-1 0   30
Origination in current year-2 0   1
Origination in current year-3 1   1
Origination in current year-4 1   0
Origination in current year-5 or more 0   1
Total term loans 94   84
Revolving loans 137   1
Financing Receivable, before Allowance for Credit Loss and Fee 231   85
Bank | Corporate and institutional | Governments and public institutions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 72   547
Origination in current year-1 1,009   271
Origination in current year-2 288   132
Origination in current year-3 114   57
Origination in current year-4 55   28
Origination in current year-5 or more 227   220
Total term loans 1,765   1,255
Revolving loans 73   32
Financing Receivable, before Allowance for Credit Loss and Fee 1,838   1,287
Bank | Corporate and institutional | Governments and public institutions | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 55   521
Origination in current year-1 978   157
Origination in current year-2 160   94
Origination in current year-3 102   46
Origination in current year-4 55   28
Origination in current year-5 or more 207   199
Total term loans 1,557   1,045
Revolving loans 73   32
Financing Receivable, before Allowance for Credit Loss and Fee 1,630   1,077
Bank | Corporate and institutional | Governments and public institutions | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 17   26
Origination in current year-1 31   114
Origination in current year-2 128   19
Origination in current year-3 1   11
Origination in current year-4 0   0
Origination in current year-5 or more 20   21
Total term loans 197   191
Revolving loans 0   0
Financing Receivable, before Allowance for Credit Loss and Fee 197   191
Bank | Corporate and institutional | Governments and public institutions | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 0   0
Origination in current year-1 0   0
Origination in current year-2 0   19
Origination in current year-3 11   0
Origination in current year-4 0   0
Origination in current year-5 or more 0   0
Total term loans 11   19
Revolving loans 0   0
Financing Receivable, before Allowance for Credit Loss and Fee 11   19
Bank | Consumer      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 11,036   32,259
Origination in current year-1 28,323   18,496
Origination in current year-2 17,061   13,761
Origination in current year-3 12,809   8,636
Origination in current year-4 7,944   6,273
Origination in current year-5 or more 42,690   41,083
Total term loans 119,863   120,508
Revolving loans 40,585   46,158
Financing Receivable, before Allowance for Credit Loss and Fee 160,448   166,666
Bank | Consumer | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 8,501   28,572
Origination in current year-1 25,658   15,930
Origination in current year-2 14,744   11,654
Origination in current year-3 10,926   7,417
Origination in current year-4 6,998   5,394
Origination in current year-5 or more 39,449   37,607
Total term loans 106,276   106,574
Revolving loans 36,547   41,899
Financing Receivable, before Allowance for Credit Loss and Fee 142,823   148,473
Bank | Consumer | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 2,533   3,642
Origination in current year-1 2,619   2,538
Origination in current year-2 2,270   2,040
Origination in current year-3 1,791   1,007
Origination in current year-4 872   792
Origination in current year-5 or more 2,865   3,116
Total term loans 12,950   13,135
Revolving loans 3,712   4,014
Financing Receivable, before Allowance for Credit Loss and Fee 16,662   17,149
Bank | Consumer | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 2   45
Origination in current year-1 46   28
Origination in current year-2 47   67
Origination in current year-3 92   212
Origination in current year-4 74   87
Origination in current year-5 or more 376   360
Total term loans 637   799
Revolving loans 326   245
Financing Receivable, before Allowance for Credit Loss and Fee 963   1,044
Bank | Consumer | Mortgages      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 7,286   26,431
Origination in current year-1 24,734   16,158
Origination in current year-2 15,147   12,995
Origination in current year-3 12,178   8,187
Origination in current year-4 7,708   6,090
Origination in current year-5 or more 41,240   39,466
Total term loans 108,293   109,327
Revolving loans 1,190   1,206
Financing Receivable, before Allowance for Credit Loss and Fee 109,483   110,533
Bank | Consumer | Mortgages | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 6,131   24,257
Origination in current year-1 22,988   14,743
Origination in current year-2 13,880   11,308
Origination in current year-3 10,677   7,287
Origination in current year-4 6,929   5,318
Origination in current year-5 or more 38,422   36,790
Total term loans 99,027   99,703
Revolving loans 317   276
Financing Receivable, before Allowance for Credit Loss and Fee 99,344   99,979
Bank | Consumer | Mortgages | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,154   2,134
Origination in current year-1 1,711   1,402
Origination in current year-2 1,235   1,639
Origination in current year-3 1,427   812
Origination in current year-4 721   698
Origination in current year-5 or more 2,491   2,359
Total term loans 8,739   9,044
Revolving loans 873   930
Financing Receivable, before Allowance for Credit Loss and Fee 9,612   9,974
Bank | Consumer | Mortgages | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1   40
Origination in current year-1 35   13
Origination in current year-2 32   48
Origination in current year-3 74   88
Origination in current year-4 58   74
Origination in current year-5 or more 327   317
Total term loans 527   580
Revolving loans 0   0
Financing Receivable, before Allowance for Credit Loss and Fee 527   580
Bank | Consumer | Loans collateralized by securities      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,765   3,312
Origination in current year-1 2,191   1,497
Origination in current year-2 1,256   228
Origination in current year-3 218   164
Origination in current year-4 43   74
Origination in current year-5 or more 1,265   1,485
Total term loans 6,738   6,760
Revolving loans 38,920   44,493
Financing Receivable, before Allowance for Credit Loss and Fee 45,658   51,253
Bank | Consumer | Loans collateralized by securities | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,057   2,627
Origination in current year-1 1,800   649
Origination in current year-2 467   61
Origination in current year-3 70   32
Origination in current year-4 18   55
Origination in current year-5 or more 1,007   804
Total term loans 4,419   4,228
Revolving loans 35,899   41,275
Financing Receivable, before Allowance for Credit Loss and Fee 40,318   45,503
Bank | Consumer | Loans collateralized by securities | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 708   685
Origination in current year-1 391   848
Origination in current year-2 789   167
Origination in current year-3 148   26
Origination in current year-4 25   19
Origination in current year-5 or more 258   681
Total term loans 2,319   2,426
Revolving loans 2,783   3,063
Financing Receivable, before Allowance for Credit Loss and Fee 5,102   5,489
Bank | Consumer | Loans collateralized by securities | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [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   106
Origination in current year-4 0   0
Origination in current year-5 or more 0   0
Total term loans 0   106
Revolving loans 238   155
Financing Receivable, before Allowance for Credit Loss and Fee 238   261
Bank | Consumer | Consumer finance      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,985   2,516
Origination in current year-1 1,398   841
Origination in current year-2 658   538
Origination in current year-3 413   285
Origination in current year-4 193   109
Origination in current year-5 or more 185   132
Total term loans 4,832   4,421
Revolving loans 475   459
Financing Receivable, before Allowance for Credit Loss and Fee 5,307   4,880
Bank | Consumer | Consumer finance | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,313   1,688
Origination in current year-1 870   538
Origination in current year-2 397   285
Origination in current year-3 179   98
Origination in current year-4 51   21
Origination in current year-5 or more 20   13
Total term loans 2,830   2,643
Revolving loans 331   348
Financing Receivable, before Allowance for Credit Loss and Fee 3,161   2,991
Bank | Consumer | Consumer finance | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 671   823
Origination in current year-1 517   288
Origination in current year-2 246   234
Origination in current year-3 216   169
Origination in current year-4 126   75
Origination in current year-5 or more 116   76
Total term loans 1,892   1,665
Revolving loans 56   21
Financing Receivable, before Allowance for Credit Loss and Fee 1,948   1,686
Bank | Consumer | Consumer finance | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1   5
Origination in current year-1 11   15
Origination in current year-2 15   19
Origination in current year-3 18   18
Origination in current year-4 16   13
Origination in current year-5 or more 49   43
Total term loans 110   113
Revolving loans 88   90
Financing Receivable, before Allowance for Credit Loss and Fee 198   203
Bank | Total loans to third parties      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Financing Receivable, before Allowance for Credit Loss and Fee 277,896   282,809
Bank | Total loans to third parties | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Financing Receivable, before Allowance for Credit Loss and Fee 214,147   218,364
Bank | Total loans to third parties | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Financing Receivable, before Allowance for Credit Loss and Fee 61,199   62,132
Bank | Total loans to third parties | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Financing Receivable, before Allowance for Credit Loss and Fee 2,550   2,313
Bank | Total loans to entities under common control      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Financing Receivable, before Allowance for Credit Loss and Fee 8,442   8,683
Bank | Total loans to entities under common control | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Financing Receivable, before Allowance for Credit Loss and Fee 8,425   8,683
Bank | Total loans to entities under common control | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Financing Receivable, before Allowance for Credit Loss and Fee 17   0
Bank | Total loans to entities under common control | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Financing Receivable, before Allowance for Credit Loss and Fee SFr 0   SFr 0