v3.26.1
Loans - Consumer Banking Portfolio by Credit Quality Indicator (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]    
Total $ 457,168 $ 453,622
Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 23,098 36,715
Term Loans by Vintage Year, Year 2 31,069 21,697
Term Loans by Vintage Year, Year 3 17,585 10,749
Term Loans by Vintage Year, Year 4 8,277 8,510
Term Loans by Vintage Year, Year 5 6,043 5,024
Prior 4,054 1,737
Total Term Loans 90,126 84,432
Revolving Loans 339 355
Revolving Loans Converted to Term 2 3
Total 90,467 84,790
Auto | Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 23,031 36,611
Term Loans by Vintage Year, Year 2 30,985 21,571
Term Loans by Vintage Year, Year 3 17,461 10,680
Term Loans by Vintage Year, Year 4 8,211 8,432
Term Loans by Vintage Year, Year 5 5,969 4,984
Prior 3,654 1,322
Total Term Loans 89,311 83,600
Revolving Loans 0 0
Revolving Loans Converted to Term 0 0
Total 89,311 83,600
Retail banking | Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 67 104
Term Loans by Vintage Year, Year 2 84 126
Term Loans by Vintage Year, Year 3 124 69
Term Loans by Vintage Year, Year 4 66 78
Term Loans by Vintage Year, Year 5 74 40
Prior 400 415
Total Term Loans 815 832
Revolving Loans 339 355
Revolving Loans Converted to Term 2 3
Total 1,156 1,190
Current | Retail banking | Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 67 103
Term Loans by Vintage Year, Year 2 80 126
Term Loans by Vintage Year, Year 3 121 69
Term Loans by Vintage Year, Year 4 65 78
Term Loans by Vintage Year, Year 5 74 40
Prior 395 411
Total Term Loans 802 827
Revolving Loans 329 341
Revolving Loans Converted to Term 2 3
Total 1,133 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 3 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 8 2
Revolving Loans 8 10
Revolving Loans Converted to Term 0 0
Total 16 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 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 0 1
Total Term Loans 0 1
Revolving Loans 2 1
Revolving Loans Converted to Term 0 0
Total 2 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 1 0
Term Loans by Vintage Year, Year 3 2 0
Term Loans by Vintage Year, Year 4 1 0
Term Loans by Vintage Year, Year 5 0 0
Prior 1 2
Total Term Loans 5 2
Revolving Loans 0 3
Revolving Loans Converted to Term 0 0
Total 5 5
Greater than 660 | Auto | Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 11,139 17,601
Term Loans by Vintage Year, Year 2 14,547 11,622
Term Loans by Vintage Year, Year 3 9,302 5,209
Term Loans by Vintage Year, Year 4 3,945 4,634
Term Loans by Vintage Year, Year 5 3,232 2,706
Prior 1,853 512
Total Term Loans 44,018 42,284
Revolving Loans 0 0
Revolving Loans Converted to Term 0 0
Total 44,018 42,284
621-660 | Auto | Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 4,131 6,691
Term Loans by Vintage Year, Year 2 5,724 4,002
Term Loans by Vintage Year, Year 3 3,267 2,258
Term Loans by Vintage Year, Year 4 1,751 1,683
Term Loans by Vintage Year, Year 5 1,207 988
Prior 730 263
Total Term Loans 16,810 15,885
Revolving Loans 0 0
Revolving Loans Converted to Term 0 0
Total 16,810 15,885
620 or below | Auto | Consumer Banking:    
Financing Receivable, Credit Quality Indicator [Line Items]    
Term Loans by Vintage Year, Year 1 7,761 12,319
Term Loans by Vintage Year, Year 2 10,714 5,947
Term Loans by Vintage Year, Year 3 4,892 3,213
Term Loans by Vintage Year, Year 4 2,515 2,115
Term Loans by Vintage Year, Year 5 1,530 1,290
Prior 1,071 547
Total Term Loans 28,483 25,431
Revolving Loans 0 0
Revolving Loans Converted to Term 0 0
Total $ 28,483 $ 25,431