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Loans - Consumer Banking Portfolio by Credit Quality Indicator (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | $ 261,390 | $ 251,624
Consumer Banking |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term loans by vintage year one | 31,147 | 29,724
Term loans by vintage year two | 21,365 | 18,253
Term loans by vintage year three | 12,388 | 10,209
Term loans by vintage year four | 6,472 | 6,191
Term loans by vintage year five | 3,490 | 2,717
Term loans by vintage after year five | 1,714 | 1,102
Total term loans | 76,576 | 68,196
Revolving loans | 528 | 683
Revolving loans converted to term | 8 | 9
Total | 77,112 | 68,888
Auto | Consumer Banking |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term loans by vintage year one | 30,727 | 28,683
Term loans by vintage year two | 21,039 | 18,020
Term loans by vintage year three | 12,204 | 9,995
Term loans by vintage year four | 6,286 | 5,967
Term loans by vintage year five | 3,302 | 2,542
Term loans by vintage after year five | 1,158 | 555
Total term loans | 74,716 | 65,762
Revolving loans | 0 | 0
Revolving loans converted to term | 0 | 0
Total | 74,716 | 65,762
Retail banking | Consumer Banking |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term loans by vintage year one | 420 | 1,041
Term loans by vintage year two | 326 | 233
Term loans by vintage year three | 184 | 214
Term loans by vintage year four | 186 | 224
Term loans by vintage year five | 188 | 175
Term loans by vintage after year five | 556 | 547
Total term loans | 1,860 | 2,434
Revolving loans | 528 | 683
Revolving loans converted to term | 8 | 9
Total | 2,396 | 3,126
PPP loans | 538 | 919
Current | Retail banking | Consumer Banking |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term loans by vintage year one | 420 | 1,041
Term loans by vintage year two | 324 | 233
Term loans by vintage year three | 184 | 206
Term loans by vintage year four | 185 | 222
Term loans by vintage year five | 187 | 167
Term loans by vintage after year five | 544 | 537
Total term loans | 1,844 | 2,406
Revolving loans | 497 | 651
Revolving loans converted to term | 6 | 7
Total | 2,347 | 3,064
30-59 days | Retail banking | Consumer Banking |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term loans by vintage year one | 0 | 0
Term loans by vintage year two | 1 | 0
Term loans by vintage year three | 0 | 7
Term loans by vintage year four | 0 | 1
Term loans by vintage year five | 0 | 2
Term loans by vintage after year five | 4 | 2
Total term loans | 5 | 12
Revolving loans | 20 | 15
Revolving loans converted to term | 1 | 1
Total | 26 | 28
60-89 days | Retail banking | Consumer Banking |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term loans by vintage year one | 0 | 0
Term loans by vintage year two | 0 | 0
Term loans by vintage year three | 0 | 1
Term loans by vintage year four | 0 | 0
Term loans by vintage year five | 0 | 5
Term loans by vintage after year five | 3 | 4
Total term loans | 3 | 10
Revolving loans | 2 | 8
Revolving loans converted to term | 0 | 1
Total | 5 | 19
Greater than 90 days | Retail banking | Consumer Banking |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term loans by vintage year one | 0 | 0
Term loans by vintage year two | 1 | 0
Term loans by vintage year three | 0 | 0
Term loans by vintage year four | 1 | 1
Term loans by vintage year five | 1 | 1
Term loans by vintage after year five | 5 | 4
Total term loans | 8 | 6
Revolving loans | 9 | 9
Revolving loans converted to term | 1 | 0
Total | 18 | 15
Greater than 660 | Auto | Consumer Banking |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term loans by vintage year one | 16,685 | 13,352
Term loans by vintage year two | 9,696 | 8,091
Term loans by vintage year three | 5,448 | 4,675
Term loans by vintage year four | 2,860 | 2,810
Term loans by vintage year five | 1,475 | 1,168
Term loans by vintage after year five | 462 | 203
Total term loans | 36,626 | 30,299
Revolving loans | 0 | 0
Revolving loans converted to term | 0 | 0
Total | 36,626 | 30,299
621-660 | Auto | Consumer Banking |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term loans by vintage year one | 6,093 | 5,781
Term loans by vintage year two | 4,212 | 3,631
Term loans by vintage year three | 2,435 | 2,003
Term loans by vintage year four | 1,276 | 1,172
Term loans by vintage year five | 666 | 488
Term loans by vintage after year five | 231 | 109
Total term loans | 14,913 | 13,184
Revolving loans | 0 | 0
Revolving loans converted to term | 0 | 0
Total | 14,913 | 13,184
620 or below | Auto | Consumer Banking |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Term loans by vintage year one | 7,949 | 9,550
Term loans by vintage year two | 7,131 | 6,298
Term loans by vintage year three | 4,321 | 3,317
Term loans by vintage year four | 2,150 | 1,985
Term loans by vintage year five | 1,161 | 886
Term loans by vintage after year five | 465 | 243
Total term loans | 23,177 | 22,279
Revolving loans | 0 | 0
Revolving loans converted to term | 0 | 0
Total | $ 23,177 | $ 22,279

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