v3.26.1
Loans and Related Allowance for Credit Losses (Credit Quality Indicators for Automobile, Credit Card, Education and Other Consumer Loan Classes) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total loans, net [1] $ 367,953   $ 367,953   $ 331,481
Gross charge-offs          
Total 324 $ 324 633 $ 636  
Automobile          
Gross charge-offs          
Year one     0   9
Year two     18   38
Year three     17   39
Year four     14   20
Year five     6   11
Prior     5   13
Revolving Loans     0   0
Revolving Loans Converted to Term     0   0
Total     60   130
Automobile | Using FICO Credit Metric          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 3,092   3,092   7,754
Year two 6,325   6,325   4,227
Year three 3,291   3,291   2,310
Year four 1,715   1,715   1,296
Year five 903   903   769
Prior 546   546   235
Revolving Loans 0   0   0
Revolving Loans Converted to Term 0   0   0
Total loans, net 15,872   15,872   16,591
Automobile | Greater than or equal to 780 | Using FICO Credit Metric          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 1,822   1,822   4,241
Year two 3,255   3,255   1,991
Year three 1,581   1,581   1,022
Year four 755   755   608
Year five 423   423   387
Prior 256   256   85
Revolving Loans 0   0   0
Revolving Loans Converted to Term 0   0   0
Total loans, net 8,092   8,092   8,334
Automobile | 720 to 779 | Using FICO Credit Metric          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 904   904   2,394
Year two 1,930   1,930   1,216
Year three 892   892   609
Year four 437   437   322
Year five 218   218   178
Prior 121   121   52
Revolving Loans 0   0   0
Revolving Loans Converted to Term 0   0   0
Total loans, net 4,502   4,502   4,771
Automobile | 660 to 719 | Using FICO Credit Metric          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 316   316   883
Year two 834   834   668
Year three 504   504   387
Year four 284   284   199
Year five 135   135   104
Prior 77   77   39
Revolving Loans 0   0   0
Revolving Loans Converted to Term 0   0   0
Total loans, net 2,150   2,150   2,280
Automobile | Less than 660 | Using FICO Credit Metric          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 50   50   236
Year two 306   306   352
Year three 314   314   292
Year four 239   239   167
Year five 127   127   100
Prior 92   92   59
Revolving Loans 0   0   0
Revolving Loans Converted to Term 0   0   0
Total loans, net 1,128   1,128   1,206
Credit card          
Gross charge-offs          
Year one     0   0
Year two     0   0
Year three     0   0
Year four     0   0
Year five     0   0
Prior     0   0
Revolving Loans     133   280
Revolving Loans Converted to Term     19   40
Total     152   320
Credit card | Using FICO Credit Metric          
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 0   0   0
Revolving Loans 7,234   7,234   6,933
Revolving Loans Converted to Term 77   77   81
Total loans, net 7,311   7,311   7,014
Credit card | Greater than or equal to 780 | Using FICO Credit Metric          
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 0   0   0
Revolving Loans 2,301   2,301   2,199
Revolving Loans Converted to Term 1   1   1
Total loans, net 2,302   2,302   2,200
Credit card | 720 to 779 | Using FICO Credit Metric          
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 0   0   0
Revolving Loans 1,990   1,990   1,903
Revolving Loans Converted to Term 6   6   6
Total loans, net 1,996   1,996   1,909
Credit card | 660 to 719 | Using FICO Credit Metric          
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 0   0   0
Revolving Loans 1,911   1,911   1,813
Revolving Loans Converted to Term 18   18   17
Total loans, net 1,929   1,929   1,830
Credit card | Less than 660 | Using FICO Credit Metric          
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 0   0   0
Revolving Loans 918   918   922
Revolving Loans Converted to Term 50   50   55
Total loans, net 968   968   977
Credit card | No FICO score available or required | Using FICO Credit Metric          
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 0   0   0
Revolving Loans 114   114   96
Revolving Loans Converted to Term 2   2   2
Total loans, net 116   116   98
Other consumer          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 429   429   914
Year two 728   728   531
Year three 394   394   308
Year four 236   236   217
Year five 159   159   85
Prior 1,130   1,130   1,149
Revolving Loans 2,819   2,819   2,501
Revolving Loans Converted to Term 9   9   7
Total loans, net 5,904   5,904   5,712
Gross charge-offs          
Year one     43   81
Year two     12   24
Year three     12   24
Year four     6   14
Year five     3   5
Prior     6   14
Revolving Loans     5   10
Revolving Loans Converted to Term     0   1
Total     87   173
Other consumer | Using FICO Credit Metric          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 428   428   908
Year two 728   728   526
Year three 392   392   290
Year four 207   207   210
Year five 152   152   75
Prior 441   441   446
Revolving Loans 199   199   205
Revolving Loans Converted to Term 0   0   0
Total loans, net 2,547   2,547   2,660
Other consumer | Greater than or equal to 780 | Using FICO Credit Metric          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 135   135   301
Year two 248   248   168
Year three 125   125   108
Year four 80   80   93
Year five 74   74   39
Prior 280   280   282
Revolving Loans 34   34   34
Revolving Loans Converted to Term 0   0   0
Total loans, net 976   976   1,025
Other consumer | 720 to 779 | Using FICO Credit Metric          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 152   152   324
Year two 250   250   175
Year three 124   124   90
Year four 62   62   58
Year five 41   41   20
Prior 97   97   98
Revolving Loans 61   61   64
Revolving Loans Converted to Term 0   0   0
Total loans, net 787   787   829
Other consumer | 660 to 719 | Using FICO Credit Metric          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 120   120   230
Year two 171   171   133
Year three 98   98   62
Year four 43   43   38
Year five 24   24   10
Prior 43   43   44
Revolving Loans 67   67   70
Revolving Loans Converted to Term 0   0   0
Total loans, net 566   566   587
Other consumer | Less than 660 | Using FICO Credit Metric          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 19   19   48
Year two 54   54   45
Year three 40   40   27
Year four 20   20   20
Year five 12   12   6
Prior 20   20   22
Revolving Loans 37   37   37
Revolving Loans Converted to Term 0   0   0
Total loans, net 202   202   205
Other consumer | No FICO score available or required | Using FICO Credit Metric          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 2   2   5
Year two 5   5   5
Year three 5   5   3
Year four 2   2   1
Year five 1   1   0
Prior 1   1   0
Revolving Loans 0   0   0
Revolving Loans Converted to Term 0   0   0
Total loans, net 16   16   14
Other consumer | Other internal credit metrics          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Year one 1   1   6
Year two 0   0   5
Year three 2   2   18
Year four 29   29   7
Year five 7   7   10
Prior 689   689   703
Revolving Loans 2,620   2,620   2,296
Revolving Loans Converted to Term 9   9   7
Total loans, net $ 3,357   $ 3,357   $ 3,052
[1] Our consolidated assets included the following for which we have elected the fair value option: Loans held for sale of $1.3 billion, Loans held for investment of $1.1 billion and Other assets of $0.1 billion at June 30, 2026. Comparable amounts at December 31, 2025 were $1.7 billion, $1.1 billion and $0.2 billion, respectively.