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CREDIT QUALITY AND THE ALLOWANCE FOR CREDIT LOSSES - Amortized Cost Basis by Credit Quality Indicator (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total $ 140,870   $ 140,870   $ 139,203
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Year one     29 $ 25  
Year two     31 17  
Year three     31 52  
Year four     116 97  
Year five     76 129  
Prior to year five     211 182  
Within the Revolving Period     136 181  
Converted to Term     0 2  
Total 195 $ 231 630 685  
Commercial          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 8,898   8,898   8,680
Year two 6,634   6,634   4,073
Year three 2,808   2,808   11,674
Year four 9,143   9,143   9,575
Year five 6,597   6,597   3,546
Prior to year five 9,559   9,559   8,223
Within the Revolving Period 28,653   28,653   23,790
Converted to Term 201   201   215
Total 72,493   72,493   69,776
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Year one     0 0  
Year two     1 0  
Year three     5 16  
Year four     72 44  
Year five     34 99  
Prior to year five     131 117  
Within the Revolving Period     26 32  
Converted to Term     0 0  
Total 91 106 269 308  
Commercial | Pass          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 8,885   8,885   8,665
Year two 6,605   6,605   3,830
Year three 2,549   2,549   9,942
Year four 7,432   7,432   8,335
Year five 5,626   5,626   2,814
Prior to year five 7,400   7,400   6,265
Within the Revolving Period 27,360   27,360   22,757
Converted to Term 61   61   70
Total 65,918   65,918   62,678
Commercial | Special Mention          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   3
Year two 11   11   79
Year three 42   42   1,009
Year four 838   838   598
Year five 563   563   223
Prior to year five 271   271   305
Within the Revolving Period 305   305   291
Converted to Term 0   0   6
Total 2,030   2,030   2,514
Commercial | Substandard Accrual          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 13   13   12
Year two 12   12   86
Year three 199   199   566
Year four 719   719   522
Year five 327   327   414
Prior to year five 1,277   1,277   1,128
Within the Revolving Period 934   934   706
Converted to Term 131   131   133
Total 3,612   3,612   3,567
Commercial | Nonaccrual          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   0
Year two 6   6   78
Year three 18   18   157
Year four 154   154   120
Year five 81   81   95
Prior to year five 611   611   525
Within the Revolving Period 54   54   36
Converted to Term 9   9   6
Total 933   933   1,017
Commercial | Commercial and industrial          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 5,683   5,683   5,956
Year two 4,553   4,553   2,679
Year three 1,789   1,789   4,567
Year four 3,273   3,273   3,490
Year five 1,797   1,797   1,087
Prior to year five 2,684   2,684   2,422
Within the Revolving Period 27,094   27,094   22,265
Converted to Term 80   80   85
Total 46,953   46,953   42,551
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Year one     0 0  
Year two     0 0  
Year three     2 15  
Year four     51 22  
Year five     22 1  
Prior to year five     5 15  
Within the Revolving Period     26 32  
Converted to Term     0 0  
Total     106 85  
Commercial | Commercial and industrial | Pass          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 5,670   5,670   5,945
Year two 4,526   4,526   2,525
Year three 1,631   1,631   4,194
Year four 2,948   2,948   2,923
Year five 1,433   1,433   895
Prior to year five 2,220   2,220   2,066
Within the Revolving Period 25,906   25,906   21,323
Converted to Term 57   57   66
Total 44,391   44,391   39,937
Commercial | Commercial and industrial | Special Mention          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   2
Year two 9   9   79
Year three 38   38   98
Year four 122   122   236
Year five 179   179   48
Prior to year five 117   117   48
Within the Revolving Period 232   232   211
Converted to Term 0   0   0
Total 697   697   722
Commercial | Commercial and industrial | Substandard Accrual          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 13   13   9
Year two 12   12   64
Year three 105   105   207
Year four 143   143   269
Year five 162   162   139
Prior to year five 271   271   253
Within the Revolving Period 911   911   697
Converted to Term 18   18   13
Total 1,635   1,635   1,651
Commercial | Commercial and industrial | Nonaccrual          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   0
Year two 6   6   11
Year three 15   15   68
Year four 60   60   62
Year five 23   23   5
Prior to year five 76   76   55
Within the Revolving Period 45   45   34
Converted to Term 5   5   6
Total 230   230   241
Commercial | Commercial real estate          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 3,215   3,215   2,724
Year two 2,081   2,081   1,394
Year three 1,019   1,019   7,107
Year four 5,870   5,870   6,085
Year five 4,800   4,800   2,459
Prior to year five 6,875   6,875   5,801
Within the Revolving Period 1,559   1,559   1,525
Converted to Term 121   121   130
Total 25,540   25,540   27,225
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Year one     0 0  
Year two     1 0  
Year three     3 1  
Year four     21 22  
Year five     12 98  
Prior to year five     126 102  
Within the Revolving Period     0 0  
Converted to Term     0 0  
Total     163 223  
Commercial | Commercial real estate | Pass          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 3,215   3,215   2,720
Year two 2,079   2,079   1,305
Year three 918   918   5,748
Year four 4,484   4,484   5,412
Year five 4,193   4,193   1,919
Prior to year five 5,180   5,180   4,199
Within the Revolving Period 1,454   1,454   1,434
Converted to Term 4   4   4
Total 21,527   21,527   22,741
Commercial | Commercial real estate | Special Mention          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   1
Year two 2   2   0
Year three 4   4   911
Year four 716   716   362
Year five 384   384   175
Prior to year five 154   154   257
Within the Revolving Period 73   73   80
Converted to Term 0   0   6
Total 1,333   1,333   1,792
Commercial | Commercial real estate | Substandard Accrual          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   3
Year two 0   0   22
Year three 94   94   359
Year four 576   576   253
Year five 165   165   275
Prior to year five 1,006   1,006   875
Within the Revolving Period 23   23   9
Converted to Term 113   113   120
Total 1,977   1,977   1,916
Commercial | Commercial real estate | Nonaccrual          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   0
Year two 0   0   67
Year three 3   3   89
Year four 94   94   58
Year five 58   58   90
Prior to year five 535   535   470
Within the Revolving Period 9   9   2
Converted to Term 4   4   0
Total 703   703   776
Retail          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 4,695   4,695   4,904
Year two 4,408   4,408   4,171
Year three 3,781   3,781   8,885
Year four 7,883   7,883   13,112
Year five 11,100   11,100   7,659
Prior to year five 15,406   15,406   11,367
Within the Revolving Period 20,016   20,016   18,318
Converted to Term 1,088   1,088   1,011
Total 68,377   68,377   69,427
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Year one     29 25  
Year two     30 17  
Year three     26 36  
Year four     44 53  
Year five     42 30  
Prior to year five     80 65  
Within the Revolving Period     110 149  
Converted to Term     0 2  
Total 104 $ 125 361 377  
Retail | Residential mortgages          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 3,682   3,682   3,459
Year two 3,259   3,259   2,554
Year three 2,543   2,543   5,621
Year four 5,512   5,512   8,318
Year five 8,065   8,065   4,833
Prior to year five 11,416   11,416   7,941
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 34,477   34,477   32,726
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Year one     0 0  
Year two     0 0  
Year three     0 0  
Year four     0 0  
Year five     0 0  
Prior to year five     2 4  
Within the Revolving Period     0 0  
Converted to Term     0 0  
Total     2 4  
Retail | Home equity          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   1
Year two 5   5   3
Year three 13   13   15
Year four 16   16   12
Year five 13   13   6
Prior to year five 185   185   336
Within the Revolving Period 17,097   17,097   15,115
Converted to Term 1,086   1,086   1,007
Total 18,415   18,415   16,495
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Year one     0 0  
Year two     0 0  
Year three     0 0  
Year four     1 0  
Year five     0 0  
Prior to year five     2 3  
Within the Revolving Period     9 8  
Converted to Term     0 1  
Total     12 12  
Retail | Automobile          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   0
Year two 0   0   346
Year three 257   257   1,534
Year four 1,023   1,023   2,041
Year five 1,213   1,213   592
Prior to year five 323   323   231
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 2,816   2,816   4,744
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Year one     0 0  
Year two     0 5  
Year three     4 23  
Year four     20 23  
Year five     16 7  
Prior to year five     7 4  
Within the Revolving Period     0 9  
Converted to Term     0 1  
Total     47 72  
Retail | Education          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 664   664   664
Year two 747   747   942
Year three 795   795   1,533
Year four 1,179   1,179   2,668
Year five 1,766   1,766   2,180
Prior to year five 3,405   3,405   2,825
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 8,556   8,556   10,812
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Year one     0 0  
Year two     3 2  
Year three     6 6  
Year four     14 18  
Year five     22 21  
Prior to year five     62 46  
Within the Revolving Period     0 0  
Converted to Term     0 0  
Total     107 93  
Retail | Other retail          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 349   349   780
Year two 397   397   326
Year three 173   173   182
Year four 153   153   73
Year five 43   43   48
Prior to year five 77   77   34
Within the Revolving Period 2,919   2,919   3,203
Converted to Term 2   2   4
Total 4,113   4,113   4,650
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Year one     29 25  
Year two     27 10  
Year three     16 7  
Year four     9 12  
Year five     4 2  
Prior to year five     7 8  
Within the Revolving Period     101 132  
Converted to Term     0 0  
Total     193 $ 196  
Greater than 800 | Retail          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 1,779   1,779   1,644
Year two 2,158   2,158   1,805
Year three 1,727   1,727   4,375
Year four 4,065   4,065   7,310
Year five 6,436   6,436   4,370
Prior to year five 8,328   8,328   5,488
Within the Revolving Period 6,863   6,863   6,146
Converted to Term 186   186   200
Total 31,542   31,542   31,338
Greater than 800 | Retail | Residential mortgages          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 1,450   1,450   1,230
Year two 1,775   1,775   1,302
Year three 1,314   1,314   3,299
Year four 3,238   3,238   5,109
Year five 4,996   4,996   2,919
Prior to year five 6,253   6,253   3,869
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 19,026   19,026   17,728
Greater than 800 | Retail | Home equity          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   1
Year two 2   2   0
Year three 2   2   3
Year four 5   5   4
Year five 5   5   1
Prior to year five 68   68   76
Within the Revolving Period 6,401   6,401   5,634
Converted to Term 186   186   200
Total 6,669   6,669   5,919
Greater than 800 | Retail | Automobile          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   0
Year two 0   0   65
Year three 52   52   380
Year four 260   260   665
Year five 392   392   183
Prior to year five 92   92   58
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 796   796   1,351
Greater than 800 | Retail | Education          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 225   225   227
Year two 276   276   373
Year three 324   324   657
Year four 529   529   1,517
Year five 1,034   1,034   1,256
Prior to year five 1,904   1,904   1,475
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 4,292   4,292   5,505
Greater than 800 | Retail | Other retail          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 104   104   186
Year two 105   105   65
Year three 35   35   36
Year four 33   33   15
Year five 9   9   11
Prior to year five 11   11   10
Within the Revolving Period 462   462   512
Converted to Term 0   0   0
Total 759   759   835
740-799 | Retail          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 2,164   2,164   2,306
Year two 1,470   1,470   1,420
Year three 1,163   1,163   2,616
Year four 2,204   2,204   3,618
Year five 2,874   2,874   2,165
Prior to year five 3,976   3,976   2,871
Within the Revolving Period 6,686   6,686   6,170
Converted to Term 209   209   225
Total 20,746   20,746   21,391
740-799 | Retail | Residential mortgages          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 1,762   1,762   1,757
Year two 1,056   1,056   873
Year three 761   761   1,568
Year four 1,486   1,486   2,213
Year five 2,041   2,041   1,338
Prior to year five 2,888   2,888   1,923
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 9,994   9,994   9,672
740-799 | Retail | Home equity          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   0
Year two 1   1   0
Year three 3   3   1
Year four 4   4   2
Year five 3   3   1
Prior to year five 49   49   65
Within the Revolving Period 5,904   5,904   5,275
Converted to Term 209   209   224
Total 6,173   6,173   5,568
740-799 | Retail | Automobile          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   0
Year two 0   0   92
Year three 66   66   430
Year four 274   274   581
Year five 329   329   176
Prior to year five 88   88   61
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 757   757   1,340
740-799 | Retail | Education          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 292   292   290
Year two 286   286   359
Year three 283   283   571
Year four 406   406   804
Year five 490   490   637
Prior to year five 930   930   811
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 2,687   2,687   3,472
740-799 | Retail | Other retail          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 110   110   259
Year two 127   127   96
Year three 50   50   46
Year four 34   34   18
Year five 11   11   13
Prior to year five 21   21   11
Within the Revolving Period 782   782   895
Converted to Term 0   0   1
Total 1,135   1,135   1,339
680-739 | Retail          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 620   620   736
Year two 571   571   609
Year three 491   491   1,159
Year four 916   916   1,358
Year five 1,068   1,068   723
Prior to year five 1,611   1,611   1,403
Within the Revolving Period 4,102   4,102   3,840
Converted to Term 185   185   184
Total 9,564   9,564   10,012
680-739 | Retail | Residential mortgages          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 423   423   425
Year two 346   346   281
Year three 256   256   552
Year four 501   501   697
Year five 673   673   385
Prior to year five 1,141   1,141   938
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 3,340   3,340   3,278
680-739 | Retail | Home equity          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   0
Year two 2   2   0
Year three 3   3   1
Year four 3   3   0
Year five 1   1   1
Prior to year five 38   38   76
Within the Revolving Period 3,363   3,363   2,995
Converted to Term 184   184   183
Total 3,594   3,594   3,256
680-739 | Retail | Automobile          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   0
Year two 0   0   91
Year three 61   61   338
Year four 211   211   385
Year five 215   215   115
Prior to year five 59   59   45
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 546   546   974
680-739 | Retail | Education          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 122   122   110
Year two 132   132   150
Year three 127   127   229
Year four 169   169   261
Year five 170   170   211
Prior to year five 352   352   337
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 1,072   1,072   1,298
680-739 | Retail | Other retail          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 75   75   201
Year two 91   91   87
Year three 44   44   39
Year four 32   32   15
Year five 9   9   11
Prior to year five 21   21   7
Within the Revolving Period 739   739   845
Converted to Term 1   1   1
Total 1,012   1,012   1,206
620-679 | Retail          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 95   95   155
Year two 148   148   208
Year three 179   179   401
Year four 358   358   416
Year five 352   352   216
Prior to year five 689   689   697
Within the Revolving Period 1,149   1,149   1,087
Converted to Term 170   170   142
Total 3,140   3,140   3,322
620-679 | Retail | Residential mortgages          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 41   41   31
Year two 62   62   61
Year three 76   76   126
Year four 161   161   151
Year five 178   178   101
Prior to year five 504   504   494
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 1,022   1,022   964
620-679 | Retail | Home equity          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   0
Year two 0   0   1
Year three 1   1   4
Year four 2   2   3
Year five 2   2   2
Prior to year five 15   15   60
Within the Revolving Period 867   867   752
Converted to Term 169   169   141
Total 1,056   1,056   963
620-679 | Retail | Automobile          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   0
Year two 0   0   51
Year three 35   35   189
Year four 123   123   194
Year five 120   120   56
Prior to year five 36   36   29
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 314   314   519
620-679 | Retail | Education          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 17   17   27
Year two 41   41   48
Year three 43   43   55
Year four 48   48   58
Year five 46   46   51
Prior to year five 122   122   111
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 317   317   350
620-679 | Retail | Other retail          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 37   37   97
Year two 45   45   47
Year three 24   24   27
Year four 24   24   10
Year five 6   6   6
Prior to year five 12   12   3
Within the Revolving Period 282   282   335
Converted to Term 1   1   1
Total 431   431   526
Less than 620 | Retail          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 20   20   52
Year two 60   60   129
Year three 220   220   334
Year four 336   336   409
Year five 369   369   184
Prior to year five 761   761   863
Within the Revolving Period 766   766   693
Converted to Term 338   338   260
Total 2,870   2,870   2,924
Less than 620 | Retail | Residential mortgages          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 6   6   15
Year two 20   20   37
Year three 136   136   76
Year four 123   123   147
Year five 176   176   89
Prior to year five 619   619   703
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 1,080   1,080   1,067
Less than 620 | Retail | Home equity          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   0
Year two 0   0   2
Year three 3   3   6
Year four 1   1   3
Year five 2   2   1
Prior to year five 13   13   59
Within the Revolving Period 559   559   459
Converted to Term 338   338   259
Total 916   916   789
Less than 620 | Retail | Automobile          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   0
Year two 0   0   47
Year three 43   43   197
Year four 155   155   216
Year five 157   157   62
Prior to year five 48   48   38
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 403   403   560
Less than 620 | Retail | Education          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 4   4   5
Year two 12   12   12
Year three 18   18   21
Year four 27   27   28
Year five 26   26   25
Prior to year five 70   70   60
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 157   157   151
Less than 620 | Retail | Other retail          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 10   10   32
Year two 28   28   31
Year three 20   20   34
Year four 30   30   15
Year five 8   8   7
Prior to year five 11   11   3
Within the Revolving Period 207   207   234
Converted to Term 0   0   1
Total 314   314   357
No FICO available | Retail          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 17   17   11
Year two 1   1   0
Year three 1   1   0
Year four 4   4   1
Year five 1   1   1
Prior to year five 41   41   45
Within the Revolving Period 450   450   382
Converted to Term 0   0   0
Total 515   515   440
No FICO available | Retail | Residential mortgages          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   1
Year two 0   0   0
Year three 0   0   0
Year four 3   3   1
Year five 1   1   1
Prior to year five 11   11   14
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 15   15   17
No FICO available | Retail | Home equity          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   0
Year two 0   0   0
Year three 1   1   0
Year four 1   1   0
Year five 0   0   0
Prior to year five 2   2   0
Within the Revolving Period 3   3   0
Converted to Term 0   0   0
Total 7   7   0
No FICO available | Retail | Automobile          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 0   0   0
Year two 0   0   0
Year three 0   0   0
Year four 0   0   0
Year five 0   0   0
Prior to year five 0   0   0
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 0   0   0
No FICO available | Retail | Education          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 4   4   5
Year two 0   0   0
Year three 0   0   0
Year four 0   0   0
Year five 0   0   0
Prior to year five 27   27   31
Within the Revolving Period 0   0   0
Converted to Term 0   0   0
Total 31   31   36
No FICO available | Retail | Other retail          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 13   13   5
Year two 1   1   0
Year three 0   0   0
Year four 0   0   0
Year five 0   0   0
Prior to year five 1   1   0
Within the Revolving Period 447   447   382
Converted to Term 0   0   0
Total $ 462   $ 462   $ 387