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CECL (Details 10) - CHF (SFr)
SFr in Millions
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year SFr 31,489   SFr 49,483
Origination in current year-1 30,029   47,577
Origination in current year-2 39,242   24,985
Origination in current year-3 22,104   17,950
Origination in current year-4 15,999   11,207
Origination in current year-5 or more 50,494   43,642
Total term loans 189,357   194,844
Revolving loans 57,523   63,385
Financing Receivable, before Allowance for Credit Loss and Fee 248,339   262,179
Gross write-offs (79) SFr (95)  
Origination In Current Year      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (24)    
Origination In Current Year -1      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (12)    
Origination In Current Year -2      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (19)    
Origination In Current Year -3      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Origination In Current Year -4      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Origination In Current Year -5 or more      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (18)    
Total term positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (73)    
Revolving positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (6)    
Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 20,506   31,284
Origination in current year-1 20,562   37,658
Origination in current year-2 31,596   19,524
Origination in current year-3 17,940   13,408
Origination in current year-4 12,167   8,667
Origination in current year-5 or more 44,604   38,301
Total term loans 147,375   148,842
Revolving loans 46,296   51,661
Financing Receivable, before Allowance for Credit Loss and Fee 195,097   204,423
Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 10,750   17,825
Origination in current year-1 9,198   9,647
Origination in current year-2 7,483   5,245
Origination in current year-3 3,902   4,261
Origination in current year-4 3,662   2,326
Origination in current year-5 or more 5,382   4,857
Total term loans 40,377   44,161
Revolving loans 10,350   10,875
Financing Receivable, before Allowance for Credit Loss and Fee 50,760   55,066
Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 233   374
Origination in current year-1 269   272
Origination in current year-2 163   216
Origination in current year-3 262   281
Origination in current year-4 170   214
Origination in current year-5 or more 508   484
Total term loans 1,605   1,841
Revolving loans 877   849
Financing Receivable, before Allowance for Credit Loss and Fee 2,482   2,690
Corporate and institutional      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 22,801   31,172
Origination in current year-1 14,712   21,633
Origination in current year-2 16,087   9,436
Origination in current year-3 8,216   6,084
Origination in current year-4 4,805   3,743
Origination in current year-5 or more 9,732   5,847
Total term loans 76,353   77,915
Revolving loans 28,686   29,506
Financing Receivable, before Allowance for Credit Loss and Fee 105,039   107,421
Gross write-offs (44) (69)  
Corporate and institutional | Origination In Current Year      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (5)    
Corporate and institutional | Origination In Current Year -1      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (12)    
Corporate and institutional | Origination In Current Year -2      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (19)    
Corporate and institutional | Origination In Current Year -3      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Origination In Current Year -4      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Origination In Current Year -5 or more      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (2)    
Corporate and institutional | Total term positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (38)    
Corporate and institutional | Revolving positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (6)    
Corporate and institutional | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 13,273   16,086
Origination in current year-1 7,266   13,885
Origination in current year-2 10,290   6,041
Origination in current year-3 5,422   3,224
Origination in current year-4 2,548   2,016
Origination in current year-5 or more 6,230   2,959
Total term loans 45,029   44,211
Revolving loans 20,827   21,091
Financing Receivable, before Allowance for Credit Loss and Fee 65,856   65,302
Corporate and institutional | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 9,312   14,728
Origination in current year-1 7,204   7,536
Origination in current year-2 5,707   3,213
Origination in current year-3 2,623   2,664
Origination in current year-4 2,169   1,564
Origination in current year-5 or more 3,214   2,658
Total term loans 30,229   32,363
Revolving loans 7,328   7,902
Financing Receivable, before Allowance for Credit Loss and Fee 37,557   40,265
Corporate and institutional | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 216   358
Origination in current year-1 242   212
Origination in current year-2 90   182
Origination in current year-3 171   196
Origination in current year-4 88   163
Origination in current year-5 or more 288   230
Total term loans 1,095   1,341
Revolving loans 531   513
Financing Receivable, before Allowance for Credit Loss and Fee 1,626   1,854
Corporate and institutional | Real estate      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 2,870   6,105
Origination in current year-1 4,066   9,442
Origination in current year-2 7,342   3,930
Origination in current year-3 3,604   1,312
Origination in current year-4 1,213   918
Origination in current year-5 or more 2,930   2,350
Total term loans 22,025   24,057
Revolving loans 959   1,100
Financing Receivable, before Allowance for Credit Loss and Fee 22,984   25,157
Gross write-offs 0    
Corporate and institutional | Real estate | Origination In Current Year      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Real estate | Origination In Current Year -1      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Real estate | Origination In Current Year -2      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Real estate | Origination In Current Year -3      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Real estate | Origination In Current Year -4      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Real estate | Origination In Current Year -5 or more      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Real estate | Total term positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Real estate | Revolving positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Real estate | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,481   3,601
Origination in current year-1 2,538   7,001
Origination in current year-2 5,422   3,071
Origination in current year-3 2,726   959
Origination in current year-4 909   698
Origination in current year-5 or more 2,522   2,109
Total term loans 15,598   17,439
Revolving loans 502   694
Financing Receivable, before Allowance for Credit Loss and Fee 16,100   18,133
Corporate and institutional | Real estate | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,358   2,499
Origination in current year-1 1,405   2,441
Origination in current year-2 1,920   855
Origination in current year-3 873   297
Origination in current year-4 263   219
Origination in current year-5 or more 384   217
Total term loans 6,203   6,528
Revolving loans 309   281
Financing Receivable, before Allowance for Credit Loss and Fee 6,512   6,809
Corporate and institutional | Real estate | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 31   5
Origination in current year-1 123   0
Origination in current year-2 0   4
Origination in current year-3 5   56
Origination in current year-4 41   1
Origination in current year-5 or more 24   24
Total term loans 224   90
Revolving loans 148   125
Financing Receivable, before Allowance for Credit Loss and Fee 372   215
Corporate and institutional | Commercial and industrial loans      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 13,163   19,302
Origination in current year-1 8,523   7,992
Origination in current year-2 6,240   4,239
Origination in current year-3 3,444   4,055
Origination in current year-4 3,140   2,246
Origination in current year-5 or more 5,403   4,178
Total term loans 39,913   42,012
Revolving loans 15,903   17,354
Financing Receivable, before Allowance for Credit Loss and Fee 55,816   59,366
Gross write-offs (43)    
Corporate and institutional | Commercial and industrial loans | Origination In Current Year      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (5)    
Corporate and institutional | Commercial and industrial loans | Origination In Current Year -1      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (12)    
Corporate and institutional | Commercial and industrial loans | Origination In Current Year -2      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (19)    
Corporate and institutional | Commercial and industrial loans | Origination In Current Year -3      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Commercial and industrial loans | Origination In Current Year -4      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Commercial and industrial loans | Origination In Current Year -5 or more      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (2)    
Corporate and institutional | Commercial and industrial loans | Total term positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (38)    
Corporate and institutional | Commercial and industrial loans | Revolving positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (5)    
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 5,766   7,858
Origination in current year-1 3,208   3,576
Origination in current year-2 2,791   1,810
Origination in current year-3 1,604   1,566
Origination in current year-4 1,203   742
Origination in current year-5 or more 2,360   1,619
Total term loans 16,932   17,171
Revolving loans 9,408   10,277
Financing Receivable, before Allowance for Credit Loss and Fee 26,340   27,448
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 7,253   11,181
Origination in current year-1 5,198   4,204
Origination in current year-2 3,359   2,251
Origination in current year-3 1,674   2,359
Origination in current year-4 1,901   1,343
Origination in current year-5 or more 2,781   2,355
Total term loans 22,166   23,693
Revolving loans 6,208   6,799
Financing Receivable, before Allowance for Credit Loss and Fee 28,374   30,492
Corporate and institutional | Commercial and industrial loans | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 144   263
Origination in current year-1 117   212
Origination in current year-2 90   178
Origination in current year-3 166   130
Origination in current year-4 36   161
Origination in current year-5 or more 262   204
Total term loans 815   1,148
Revolving loans 287   278
Financing Receivable, before Allowance for Credit Loss and Fee 1,102   1,426
Corporate and institutional | Financial institutions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 6,686   5,596
Origination in current year-1 1,677   3,706
Origination in current year-2 2,373   1,101
Origination in current year-3 1,011   609
Origination in current year-4 344   524
Origination in current year-5 or more     (868)
Origination in current year-5 or more 1,207    
Total term loans 13,298   10,668
Revolving loans 11,813   11,043
Financing Receivable, before Allowance for Credit Loss and Fee 25,111   21,711
Gross write-offs (1)    
Corporate and institutional | Financial institutions | Origination In Current Year      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Financial institutions | Origination In Current Year -1      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Financial institutions | Origination In Current Year -2      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Financial institutions | Origination In Current Year -3      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Financial institutions | Origination In Current Year -4      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Financial institutions | Origination In Current Year -5 or more      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Financial institutions | Total term positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Financial institutions | Revolving positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (1)    
Corporate and institutional | Financial institutions | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 5,964   4,480
Origination in current year-1 1,078   2,850
Origination in current year-2 1,976   1,034
Origination in current year-3 968   602
Origination in current year-4 340   521
Origination in current year-5 or more     (940)
Origination in current year-5 or more 1,166    
Total term loans 11,492   8,547
Revolving loans 10,907   10,111
Financing Receivable, before Allowance for Credit Loss and Fee 22,399   18,658
Corporate and institutional | Financial institutions | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 681   1,026
Origination in current year-1 597   856
Origination in current year-2 397   67
Origination in current year-3 43   7
Origination in current year-4 4   2
Origination in current year-5 or more 40   71
Total term loans 1,762   2,029
Revolving loans 810   822
Financing Receivable, before Allowance for Credit Loss and Fee 2,572   2,851
Corporate and institutional | Financial institutions | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 41   90
Origination in current year-1 2   0
Origination in current year-2 0   0
Origination in current year-3 0   0
Origination in current year-4 0   1
Origination in current year-5 or more 1   1
Total term loans 44   92
Revolving loans 96   110
Financing Receivable, before Allowance for Credit Loss and Fee 140   202
Corporate and institutional | Governments and public institutions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 82   169
Origination in current year-1 446   493
Origination in current year-2 132   166
Origination in current year-3 157   108
Origination in current year-4 108   55
Origination in current year-5 or more 192   187
Total term loans 1,117   1,178
Revolving loans 11   9
Financing Receivable, before Allowance for Credit Loss and Fee 1,128   1,187
Gross write-offs 0    
Corporate and institutional | Governments and public institutions | Origination In Current Year      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Governments and public institutions | Origination In Current Year -1      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Governments and public institutions | Origination In Current Year -2      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Governments and public institutions | Origination In Current Year -3      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Governments and public institutions | Origination In Current Year -4      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Governments and public institutions | Origination In Current Year -5 or more      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Governments and public institutions | Total term positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Corporate and institutional | Governments and public institutions | Revolving positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
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 62   147
Origination in current year-1 442   458
Origination in current year-2 101   126
Origination in current year-3 124   97
Origination in current year-4 96   55
Origination in current year-5 or more 182   171
Total term loans 1,007   1,054
Revolving loans 10   9
Financing Receivable, before Allowance for Credit Loss and Fee 1,017   1,063
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 20   22
Origination in current year-1 4   35
Origination in current year-2 31   40
Origination in current year-3 33   1
Origination in current year-4 1   0
Origination in current year-5 or more 9   15
Total term loans 98   113
Revolving loans 1   0
Financing Receivable, before Allowance for Credit Loss and Fee 99   113
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   0
Origination in current year-3 0   10
Origination in current year-4 11   0
Origination in current year-5 or more 1   1
Total term loans 12   11
Revolving loans 0   0
Financing Receivable, before Allowance for Credit Loss and Fee 12   11
Consumer      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 8,688   18,311
Origination in current year-1 15,317   25,944
Origination in current year-2 23,155   15,549
Origination in current year-3 13,888   11,866
Origination in current year-4 11,194   7,464
Origination in current year-5 or more 40,762   37,795
Total term loans 113,004   116,929
Revolving loans 28,837   33,879
Financing Receivable, before Allowance for Credit Loss and Fee 141,841   150,808
Gross write-offs (35) SFr (26)  
Consumer | Origination In Current Year      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (19)    
Consumer | Origination In Current Year -1      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Origination In Current Year -2      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Origination In Current Year -3      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Origination In Current Year -4      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Origination In Current Year -5 or more      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (16)    
Consumer | Total term positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (35)    
Consumer | Revolving positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 7,233   15,198
Origination in current year-1 13,296   23,773
Origination in current year-2 21,306   13,483
Origination in current year-3 12,518   10,184
Origination in current year-4 9,619   6,651
Origination in current year-5 or more 38,374   35,342
Total term loans 102,346   104,631
Revolving loans 25,469   30,570
Financing Receivable, before Allowance for Credit Loss and Fee 127,815   135,201
Consumer | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,438   3,097
Origination in current year-1 1,994   2,111
Origination in current year-2 1,776   2,032
Origination in current year-3 1,279   1,597
Origination in current year-4 1,493   762
Origination in current year-5 or more 2,168   2,199
Total term loans 10,148   11,798
Revolving loans 3,022   2,973
Financing Receivable, before Allowance for Credit Loss and Fee 13,170   14,771
Consumer | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 17   16
Origination in current year-1 27   60
Origination in current year-2 73   34
Origination in current year-3 91   85
Origination in current year-4 82   51
Origination in current year-5 or more 220   254
Total term loans 510   500
Revolving loans 346   336
Financing Receivable, before Allowance for Credit Loss and Fee 856   836
Consumer | Mortgages      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 5,528   14,049
Origination in current year-1 13,319   23,068
Origination in current year-2 20,688   13,999
Origination in current year-3 13,245   11,367
Origination in current year-4 10,813   7,295
Origination in current year-5 or more 39,696   36,666
Total term loans 103,289   106,444
Revolving loans 913   1,040
Financing Receivable, before Allowance for Credit Loss and Fee 104,202   107,484
Gross write-offs (4)    
Consumer | Mortgages | Origination In Current Year      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Mortgages | Origination In Current Year -1      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Mortgages | Origination In Current Year -2      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Mortgages | Origination In Current Year -3      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Mortgages | Origination In Current Year -4      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Mortgages | Origination In Current Year -5 or more      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (4)    
Consumer | Mortgages | Total term positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (4)    
Consumer | Mortgages | Revolving positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Mortgages | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 5,118   12,501
Origination in current year-1 11,914   21,627
Origination in current year-2 19,465   12,869
Origination in current year-3 12,173   10,029
Origination in current year-4 9,539   6,609
Origination in current year-5 or more 37,618   34,525
Total term loans 95,827   98,160
Revolving loans 187   229
Financing Receivable, before Allowance for Credit Loss and Fee 96,014   98,389
Consumer | Mortgages | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 394   1,540
Origination in current year-1 1,394   1,396
Origination in current year-2 1,167   1,111
Origination in current year-3 996   1,271
Origination in current year-4 1,209   650
Origination in current year-5 or more 1,910   1,931
Total term loans 7,070   7,899
Revolving loans 720   807
Financing Receivable, before Allowance for Credit Loss and Fee 7,790   8,706
Consumer | Mortgages | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 16   8
Origination in current year-1 11   45
Origination in current year-2 56   19
Origination in current year-3 76   67
Origination in current year-4 65   36
Origination in current year-5 or more 168   210
Total term loans 392   385
Revolving loans 6   4
Financing Receivable, before Allowance for Credit Loss and Fee 398   389
Consumer | Loans collateralized by securities      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 751   1,114
Origination in current year-1 406   1,877
Origination in current year-2 1,671   1,028
Origination in current year-3 201   178
Origination in current year-4 151   41
Origination in current year-5 or more 860   991
Total term loans 4,040   5,229
Revolving loans 27,736   32,410
Financing Receivable, before Allowance for Credit Loss and Fee 31,776   37,639
Gross write-offs 0    
Consumer | Loans collateralized by securities | Origination In Current Year      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Loans collateralized by securities | Origination In Current Year -1      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Loans collateralized by securities | Origination In Current Year -2      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Loans collateralized by securities | Origination In Current Year -3      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Loans collateralized by securities | Origination In Current Year -4      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Loans collateralized by securities | Origination In Current Year -5 or more      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Loans collateralized by securities | Total term positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Loans collateralized by securities | Revolving positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Loans collateralized by securities | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 291   562
Origination in current year-1 321   1,496
Origination in current year-2 1,341   307
Origination in current year-3 101   35
Origination in current year-4 1   16
Origination in current year-5 or more 730   803
Total term loans 2,785   3,219
Revolving loans 25,194   30,023
Financing Receivable, before Allowance for Credit Loss and Fee 27,979   33,242
Consumer | Loans collateralized by securities | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 460   552
Origination in current year-1 85   381
Origination in current year-2 330   721
Origination in current year-3 100   143
Origination in current year-4 150   25
Origination in current year-5 or more 130   188
Total term loans 1,255   2,010
Revolving loans 2,278   2,124
Financing Receivable, before Allowance for Credit Loss and Fee 3,533   4,134
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   0
Origination in current year-4 0   0
Origination in current year-5 or more 0   0
Total term loans 0   0
Revolving loans 264   263
Financing Receivable, before Allowance for Credit Loss and Fee 264   263
Consumer | Consumer finance      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 2,409   3,148
Origination in current year-1 1,592   999
Origination in current year-2 796   522
Origination in current year-3 442   321
Origination in current year-4 230   128
Origination in current year-5 or more 206   138
Total term loans 5,675   5,256
Revolving loans 188   429
Financing Receivable, before Allowance for Credit Loss and Fee 5,863   5,685
Gross write-offs (31)    
Consumer | Consumer finance | Origination In Current Year      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (19)    
Consumer | Consumer finance | Origination In Current Year -1      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Consumer finance | Origination In Current Year -2      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Consumer finance | Origination In Current Year -3      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Consumer finance | Origination In Current Year -4      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Consumer finance | Origination In Current Year -5 or more      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (12)    
Consumer | Consumer finance | Total term positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs (31)    
Consumer | Consumer finance | Revolving positions      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Gross write-offs 0    
Consumer | Consumer finance | Investment grade | AAA to BBB      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1,824   2,135
Origination in current year-1 1,061   650
Origination in current year-2 500   307
Origination in current year-3 244   120
Origination in current year-4 79   26
Origination in current year-5 or more 26   14
Total term loans 3,734   3,252
Revolving loans 88   318
Financing Receivable, before Allowance for Credit Loss and Fee 3,822   3,570
Consumer | Consumer finance | Non-investment grade | BB to C      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 584   1,005
Origination in current year-1 515   334
Origination in current year-2 279   200
Origination in current year-3 183   183
Origination in current year-4 134   87
Origination in current year-5 or more 128   80
Total term loans 1,823   1,889
Revolving loans 24   42
Financing Receivable, before Allowance for Credit Loss and Fee 1,847   1,931
Consumer | Consumer finance | Non-investment grade | D      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Origination in current year 1   8
Origination in current year-1 16   15
Origination in current year-2 17   15
Origination in current year-3 15   18
Origination in current year-4 17   15
Origination in current year-5 or more 52   44
Total term loans 118   115
Revolving loans 76   69
Financing Receivable, before Allowance for Credit Loss and Fee 194   184
Total loans to third parties      
Loans Held At Amortized Cost, Amortized Cost [Line Items]      
Financing Receivable, before Allowance for Credit Loss and Fee 246,880   258,229
Gross write-offs (79)    
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 193,671   200,503
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 50,727   55,036
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 2,482   2,690
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 1,459   3,950
Gross write-offs 0    
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 1,426   3,920
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 33   30
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