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Loans - Consumer Banking Portfolio by Credit Quality Indicator (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | $ 443,159 | $ 327,775
Consumer Banking: |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 28,608 | 30,886
Term Loans by Vintage Year, Year 2 | 23,856 | 16,785
Term Loans by Vintage Year, Year 3 | 12,099 | 14,819
Term Loans by Vintage Year, Year 4 | 9,890 | 10,202
Term Loans by Vintage Year, Year 5 | 6,114 | 3,408
Prior | 2,311 | 1,623
Total Term Loans | 82,878 | 77,723
Revolving Loans | 349 | 365
Revolving Loans Converted to Term | 3 | 4
Total | 83,230 | 78,092
Auto | Consumer Banking: |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 28,525 | 30,743
Term Loans by Vintage Year, Year 2 | 23,727 | 16,707
Term Loans by Vintage Year, Year 3 | 12,028 | 14,726
Term Loans by Vintage Year, Year 4 | 9,809 | 10,153
Term Loans by Vintage Year, Year 5 | 6,072 | 3,356
Prior | 1,874 | 1,144
Total Term Loans | 82,035 | 76,829
Revolving Loans | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 82,035 | 76,829
Retail banking | Consumer Banking: |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 83 | 143
Term Loans by Vintage Year, Year 2 | 129 | 78
Term Loans by Vintage Year, Year 3 | 71 | 93
Term Loans by Vintage Year, Year 4 | 81 | 49
Term Loans by Vintage Year, Year 5 | 42 | 52
Prior | 437 | 479
Total Term Loans | 843 | 894
Revolving Loans | 349 | 365
Revolving Loans Converted to Term | 3 | 4
Total | 1,195 | 1,263
Current | Retail banking | Consumer Banking: |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 83 | 143
Term Loans by Vintage Year, Year 2 | 129 | 78
Term Loans by Vintage Year, Year 3 | 71 | 93
Term Loans by Vintage Year, Year 4 | 81 | 49
Term Loans by Vintage Year, Year 5 | 42 | 51
Prior | 433 | 469
Total Term Loans | 839 | 883
Revolving Loans | 338 | 351
Revolving Loans Converted to Term | 3 | 3
Total | 1,180 | 1,237
30-59 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 | 2 | 2
Total Term Loans | 2 | 2
Revolving Loans | 9 | 11
Revolving Loans Converted to Term | 0 | 0
Total | 11 | 13
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 | 1 | 1
Total Term Loans | 1 | 1
Revolving Loans | 1 | 2
Revolving Loans Converted to Term | 0 | 0
Total | 2 | 3
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 | 1
Prior | 1 | 7
Total Term Loans | 1 | 8
Revolving Loans | 1 | 1
Revolving Loans Converted to Term | 0 | 1
Total | 2 | 10
Greater than 660 | Auto | Consumer Banking: |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 13,606 | 17,057
Term Loans by Vintage Year, Year 2 | 12,853 | 8,333
Term Loans by Vintage Year, Year 3 | 5,902 | 8,194
Term Loans by Vintage Year, Year 4 | 5,413 | 5,621
Term Loans by Vintage Year, Year 5 | 3,323 | 1,482
Prior | 742 | 394
Total Term Loans | 41,839 | 41,081
Revolving Loans | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 41,839 | 41,081
621-660 | Auto | Consumer Banking: |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 5,201 | 5,584
Term Loans by Vintage Year, Year 2 | 4,385 | 3,492
Term Loans by Vintage Year, Year 3 | 2,537 | 2,906
Term Loans by Vintage Year, Year 4 | 1,951 | 1,986
Term Loans by Vintage Year, Year 5 | 1,198 | 667
Prior | 375 | 235
Total Term Loans | 15,647 | 14,870
Revolving Loans | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 15,647 | 14,870
620 or below | Auto | Consumer Banking: |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 9,718 | 8,102
Term Loans by Vintage Year, Year 2 | 6,489 | 4,882
Term Loans by Vintage Year, Year 3 | 3,589 | 3,626
Term Loans by Vintage Year, Year 4 | 2,445 | 2,546
Term Loans by Vintage Year, Year 5 | 1,551 | 1,207
Prior | 757 | 515
Total Term Loans | 24,549 | 20,878
Revolving Loans | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | $ 24,549 | $ 20,878

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