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Loans - Credit Card Delinquency Status (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total | $ 312,331 | $ 277,340
Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 137,394 | 114,361
Revolving loans converted to term | 336 | 411
Total | 137,730 | 114,772
Domestic credit card: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 131,284 | 108,364
Revolving loans converted to term | 297 | 359
Total | 131,581 | 108,723
International card businesses: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 6,110 | 5,997
Revolving loans converted to term | 39 | 52
Total | 6,149 | 6,049
Current | Domestic credit card: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 126,811 | 105,985
Revolving loans converted to term | 255 | 327
Total | 127,066 | 106,312
Current | International card businesses: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 5,866 | 5,795
Revolving loans converted to term | 29 | 41
Total | 5,895 | 5,836
30-59 days | Domestic credit card: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 1,388 | 760
Revolving loans converted to term | 17 | 13
Total | 1,405 | 773
30-59 days | International card businesses: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 83 | 73
Revolving loans converted to term | 3 | 4
Total | 86 | 77
60-89 days | Domestic credit card: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 964 | 519
Revolving loans converted to term | 11 | 9
Total | 975 | 528
60-89 days | International card businesses: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 55 | 47
Revolving loans converted to term | 3 | 3
Total | 58 | 50
Greater than 90 days | Domestic credit card: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 2,121 | 1,100
Revolving loans converted to term | 14 | 10
Total | 2,135 | 1,110
Greater than 90 days | International card businesses: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 106 | 82
Revolving loans converted to term | 4 | 4
Total | $ 110 | $ 86

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