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Loans - Consumer Banking Portfolio by Credit Quality Indicator (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | $ 320,243 | $ 320,472
Consumer Banking: |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 23,264 | 23,828
Term Loans by Vintage Year, Year 2 | 18,455 | 22,721
Term Loans by Vintage Year, Year 3 | 16,639 | 17,192
Term Loans by Vintage Year, Year 4 | 11,779 | 6,876
Term Loans by Vintage Year, Year 5 | 4,151 | 3,053
Prior | 2,110 | 1,380
Total Term Loans | 76,398 | 75,050
Revolving Loans | 356 | 382
Revolving Loans Converted to Term | 4 | 5
Total | 76,758 | 75,437
Auto | Consumer Banking: |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 23,151 | 23,729
Term Loans by Vintage Year, Year 2 | 18,377 | 22,564
Term Loans by Vintage Year, Year 3 | 16,547 | 17,134
Term Loans by Vintage Year, Year 4 | 11,727 | 6,810
Term Loans by Vintage Year, Year 5 | 4,096 | 2,936
Prior | 1,607 | 902
Total Term Loans | 75,505 | 74,075
Revolving Loans | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 75,505 | 74,075
Retail banking | Consumer Banking: |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 113 | 99
Term Loans by Vintage Year, Year 2 | 78 | 157
Term Loans by Vintage Year, Year 3 | 92 | 58
Term Loans by Vintage Year, Year 4 | 52 | 66
Term Loans by Vintage Year, Year 5 | 55 | 117
Prior | 503 | 478
Total Term Loans | 893 | 975
Revolving Loans | 356 | 382
Revolving Loans Converted to Term | 4 | 5
Total | 1,253 | 1,362
Current | Retail banking | Consumer Banking: |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 113 | 98
Term Loans by Vintage Year, Year 2 | 78 | 157
Term Loans by Vintage Year, Year 3 | 92 | 57
Term Loans by Vintage Year, Year 4 | 52 | 65
Term Loans by Vintage Year, Year 5 | 54 | 117
Prior | 494 | 468
Total Term Loans | 883 | 962
Revolving Loans | 342 | 363
Revolving Loans Converted to Term | 4 | 4
Total | 1,229 | 1,329
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 | 0 | 1
Term Loans by Vintage Year, Year 4 | 0 | 1
Term Loans by Vintage Year, Year 5 | 0 | 0
Prior | 2 | 1
Total Term Loans | 2 | 4
Revolving Loans | 11 | 11
Revolving Loans Converted to Term | 0 | 0
Total | 13 | 15
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 | 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 | 1 | 0
Prior | 7 | 8
Total Term Loans | 8 | 8
Revolving Loans | 1 | 6
Revolving Loans Converted to Term | 0 | 1
Total | 9 | 15
Greater than 660 | Auto | Consumer Banking: |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 12,790 | 12,219
Term Loans by Vintage Year, Year 2 | 9,219 | 12,593
Term Loans by Vintage Year, Year 3 | 9,214 | 9,505
Term Loans by Vintage Year, Year 4 | 6,501 | 3,124
Term Loans by Vintage Year, Year 5 | 1,832 | 1,213
Prior | 578 | 309
Total Term Loans | 40,134 | 38,963
Revolving Loans | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 40,134 | 38,963
621-660 | Auto | Consumer Banking: |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 4,316 | 4,863
Term Loans by Vintage Year, Year 2 | 3,827 | 4,432
Term Loans by Vintage Year, Year 3 | 3,262 | 3,346
Term Loans by Vintage Year, Year 4 | 2,291 | 1,337
Term Loans by Vintage Year, Year 5 | 811 | 592
Prior | 330 | 192
Total Term Loans | 14,837 | 14,762
Revolving Loans | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 14,837 | 14,762
620 or below | Auto | Consumer Banking: |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 6,045 | 6,647
Term Loans by Vintage Year, Year 2 | 5,331 | 5,539
Term Loans by Vintage Year, Year 3 | 4,071 | 4,283
Term Loans by Vintage Year, Year 4 | 2,935 | 2,349
Term Loans by Vintage Year, Year 5 | 1,453 | 1,131
Prior | 699 | 401
Total Term Loans | 20,534 | 20,350
Revolving Loans | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | $ 20,534 | $ 20,350

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