v3.26.1
Loans - Consumer Banking Portfolio by Credit Quality Indicator (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]    
Total $ 447,754 $ 453,622
Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 11,068 36,715
Term Loans by Vintage Year, Year 2 33,886 21,697
Term Loans by Vintage Year, Year 3 19,602 10,749
Term Loans by Vintage Year, Year 4 9,475 8,510
Term Loans by Vintage Year, Year 5 7,217 5,024
Prior 5,281 1,737
Total Term Loans 86,529 84,432
Revolving Loans 342 355
Revolving Loans Converted to Term 2 3
Total 86,873 84,790
Auto | Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 11,021 36,611
Term Loans by Vintage Year, Year 2 33,801 21,571
Term Loans by Vintage Year, Year 3 19,476 10,680
Term Loans by Vintage Year, Year 4 9,407 8,432
Term Loans by Vintage Year, Year 5 7,141 4,984
Prior 4,854 1,322
Total Term Loans 85,700 83,600
Revolving Loans 0 0
Revolving Loans Converted to Term 0 0
Total 85,700 83,600
Retail banking | Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 47 104
Term Loans by Vintage Year, Year 2 85 126
Term Loans by Vintage Year, Year 3 126 69
Term Loans by Vintage Year, Year 4 68 78
Term Loans by Vintage Year, Year 5 76 40
Prior 427 415
Total Term Loans 829 832
Revolving Loans 342 355
Revolving Loans Converted to Term 2 3
Total 1,173 1,190
Current | Retail banking | Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 47 103
Term Loans by Vintage Year, Year 2 84 126
Term Loans by Vintage Year, Year 3 125 69
Term Loans by Vintage Year, Year 4 67 78
Term Loans by Vintage Year, Year 5 76 40
Prior 422 411
Total Term Loans 821 827
Revolving Loans 330 341
Revolving Loans Converted to Term 2 3
Total 1,153 1,171
30-59 days | Retail banking | Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 0 1
Term Loans by Vintage Year, Year 2 0 0
Term Loans by Vintage Year, Year 3 1 0
Term Loans by Vintage Year, Year 4 0 0
Term Loans by Vintage Year, Year 5 0 0
Prior 4 1
Total Term Loans 5 2
Revolving Loans 9 10
Revolving Loans Converted to Term 0 0
Total 14 12
60-89 days | Retail banking | Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 0 0
Term Loans by Vintage Year, Year 2 1 0
Term Loans by Vintage Year, Year 3 0 0
Term Loans by Vintage Year, Year 4 1 0
Term Loans by Vintage Year, Year 5 0 0
Prior 0 1
Total Term Loans 2 1
Revolving Loans 2 1
Revolving Loans Converted to Term 0 0
Total 4 2
Greater than 90 days | Retail banking | Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 0 0
Term Loans by Vintage Year, Year 2 0 0
Term Loans by Vintage Year, Year 3 0 0
Term Loans by Vintage Year, Year 4 0 0
Term Loans by Vintage Year, Year 5 0 0
Prior 1 2
Total Term Loans 1 2
Revolving Loans 1 3
Revolving Loans Converted to Term 0 0
Total 2 5
Greater than 660 | Auto | Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 5,371 17,601
Term Loans by Vintage Year, Year 2 16,021 11,622
Term Loans by Vintage Year, Year 3 10,430 5,209
Term Loans by Vintage Year, Year 4 4,551 4,634
Term Loans by Vintage Year, Year 5 3,899 2,706
Prior 2,472 512
Total Term Loans 42,744 42,284
Revolving Loans 0 0
Revolving Loans Converted to Term 0 0
Total 42,744 42,284
621-660 | Auto | Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 1,980 6,691
Term Loans by Vintage Year, Year 2 6,223 4,002
Term Loans by Vintage Year, Year 3 3,630 2,258
Term Loans by Vintage Year, Year 4 2,000 1,683
Term Loans by Vintage Year, Year 5 1,434 988
Prior 964 263
Total Term Loans 16,231 15,885
Revolving Loans 0 0
Revolving Loans Converted to Term 0 0
Total 16,231 15,885
620 or below | Auto | Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 3,670 12,319
Term Loans by Vintage Year, Year 2 11,557 5,947
Term Loans by Vintage Year, Year 3 5,416 3,213
Term Loans by Vintage Year, Year 4 2,856 2,115
Term Loans by Vintage Year, Year 5 1,808 1,290
Prior 1,418 547
Total Term Loans 26,725 25,431
Revolving Loans 0 0
Revolving Loans Converted to Term 0 0
Total $ 26,725 $ 25,431