v3.25.4
Loans and Related Allowance for Credit Losses, Credit Quality Indicators for Auto Loans by Vintage (Details) - Total Consumer [Member] - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]    
Total loans $ 386,272 $ 378,586
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]    
Loan charge-offs, loans 3,944 4,118
Auto [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]    
Term loans by origination year, current fiscal year, finance receivable 26,538 13,880
Term loans by origination year, fiscal year before current fiscal year, finance receivable 9,059 9,243
Term loans by origination year, two years before current fiscal year, finance receivable 5,625 8,710
Term loans by origination year, three years before current fiscal year, finance receivable 4,931 7,616
Term loans by origination year, four years before current fiscal year, finance receivable 3,602 2,171
Term loans by origination year, more than five years before current fiscal year, finance receivable 732 747
Total loans 50,487 42,367
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]    
Term loans by origination year, current fiscal year, charge-offs 29 10
Term loans by origination year, fiscal year before current fiscal year, charge-offs 41 48
Term loans by origination year, two years before current fiscal year, charge-offs 47 246
Term loans by origination year, three years before current fiscal year, charge-offs 160 270
Term loans by origination year, four years before current fiscal year, charge-offs 149 55
Term loans by origination year, more than five years before current fiscal year, charge-offs 27 23
Loan charge-offs, loans 453 652
Auto [Member] | FICO 740 or more [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]    
Term loans by origination year, current fiscal year, finance receivable 14,805 8,758
Term loans by origination year, fiscal year before current fiscal year, finance receivable 5,654 6,197
Term loans by origination year, two years before current fiscal year, finance receivable 3,708 4,358
Term loans by origination year, three years before current fiscal year, finance receivable 2,429 3,199
Term loans by origination year, four years before current fiscal year, finance receivable 1,430 841
Term loans by origination year, more than five years before current fiscal year, finance receivable 219 249
Total loans 28,245 23,602
Auto [Member] | FICO 700 to 739 [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]    
Term loans by origination year, current fiscal year, finance receivable 4,376 2,483
Term loans by origination year, fiscal year before current fiscal year, finance receivable 1,419 1,307
Term loans by origination year, two years before current fiscal year, finance receivable 749 1,188
Term loans by origination year, three years before current fiscal year, finance receivable 630 1,020
Term loans by origination year, four years before current fiscal year, finance receivable 443 307
Term loans by origination year, more than five years before current fiscal year, finance receivable 87 101
Total loans 7,704 6,406
Auto [Member] | FICO 660 to 699 [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]    
Term loans by origination year, current fiscal year, finance receivable 3,411 1,689
Term loans by origination year, fiscal year before current fiscal year, finance receivable 1,003 864
Term loans by origination year, two years before current fiscal year, finance receivable 507 1,028
Term loans by origination year, three years before current fiscal year, finance receivable 534 930
Term loans by origination year, four years before current fiscal year, finance receivable 409 280
Term loans by origination year, more than five years before current fiscal year, finance receivable 87 95
Total loans 5,951 4,886
Auto [Member] | FICO 620 to 659 [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]    
Term loans by origination year, current fiscal year, finance receivable 2,039 623
Term loans by origination year, fiscal year before current fiscal year, finance receivable 460 401
Term loans by origination year, two years before current fiscal year, finance receivable 248 667
Term loans by origination year, three years before current fiscal year, finance receivable 370 661
Term loans by origination year, four years before current fiscal year, finance receivable 314 198
Term loans by origination year, more than five years before current fiscal year, finance receivable 72 72
Total loans 3,503 2,622
Auto [Member] | FICO less than 620 [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]    
Term loans by origination year, current fiscal year, finance receivable 1,892 319
Term loans by origination year, fiscal year before current fiscal year, finance receivable 504 455
Term loans by origination year, two years before current fiscal year, finance receivable 410 1,450
Term loans by origination year, three years before current fiscal year, finance receivable 950 1,775
Term loans by origination year, four years before current fiscal year, finance receivable 983 529
Term loans by origination year, more than five years before current fiscal year, finance receivable 258 223
Total loans 4,997 4,751
Auto [Member] | No FICO available [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]    
Term loans by origination year, current fiscal year, finance receivable 15 8
Term loans by origination year, fiscal year before current fiscal year, finance receivable 19 19
Term loans by origination year, two years before current fiscal year, finance receivable 3 19
Term loans by origination year, three years before current fiscal year, finance receivable 18 31
Term loans by origination year, four years before current fiscal year, finance receivable 23 16
Term loans by origination year, more than five years before current fiscal year, finance receivable 9 7
Total loans 87 100
Auto [Member] | Current-29 days past due [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]    
Term loans by origination year, current fiscal year, finance receivable 26,413 13,846
Term loans by origination year, fiscal year before current fiscal year, finance receivable 8,993 9,175
Term loans by origination year, two years before current fiscal year, finance receivable 5,560 8,415
Term loans by origination year, three years before current fiscal year, finance receivable 4,728 7,205
Term loans by origination year, four years before current fiscal year, finance receivable 3,357 2,042
Term loans by origination year, more than five years before current fiscal year, finance receivable 654 684
Total loans 49,705 41,367
Auto [Member] | 30 to 89 days past due [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]    
Term loans by origination year, current fiscal year, finance receivable 115 32
Term loans by origination year, fiscal year before current fiscal year, finance receivable 61 63
Term loans by origination year, two years before current fiscal year, finance receivable 60 270
Term loans by origination year, three years before current fiscal year, finance receivable 187 380
Term loans by origination year, four years before current fiscal year, finance receivable 227 122
Term loans by origination year, more than five years before current fiscal year, finance receivable 72 60
Total loans 722 927
Auto [Member] | 90 days or more past due [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]    
Term loans by origination year, current fiscal year, finance receivable 10 2
Term loans by origination year, fiscal year before current fiscal year, finance receivable 5 5
Term loans by origination year, two years before current fiscal year, finance receivable 5 25
Term loans by origination year, three years before current fiscal year, finance receivable 16 31
Term loans by origination year, four years before current fiscal year, finance receivable 18 7
Term loans by origination year, more than five years before current fiscal year, finance receivable 6 3
Total loans $ 60 $ 73