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Loans - Credit Card Delinquency Status (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total | $ 308,836 | $ 312,331
Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 136,786 | 137,394
Revolving Loans Converted to Term | 356 | 336
Total | 137,142 | 137,730
Domestic credit card: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 130,661 | 131,284
Revolving Loans Converted to Term | 319 | 297
Total | 130,980 | 131,581
International card businesses: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 6,125 | 6,110
Revolving Loans Converted to Term | 37 | 39
Total | 6,162 | 6,149
Current | Domestic credit card: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 125,911 | 126,811
Revolving Loans Converted to Term | 278 | 255
Total | 126,189 | 127,066
Current | International card businesses: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 5,869 | 5,866
Revolving Loans Converted to Term | 29 | 29
Total | 5,898 | 5,895
30-59 days | Domestic credit card: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 1,390 | 1,388
Revolving Loans Converted to Term | 16 | 17
Total | 1,406 | 1,405
30-59 days | International card businesses: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 86 | 83
Revolving Loans Converted to Term | 3 | 3
Total | 89 | 86
60-89 days | Domestic credit card: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 1,022 | 964
Revolving Loans Converted to Term | 11 | 11
Total | 1,033 | 975
60-89 days | International card businesses: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 57 | 55
Revolving Loans Converted to Term | 2 | 3
Total | 59 | 58
Greater than 90 days | Domestic credit card: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 2,338 | 2,121
Revolving Loans Converted to Term | 14 | 14
Total | 2,352 | 2,135
Greater than 90 days | International card businesses: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 113 | 106
Revolving Loans Converted to Term | 3 | 4
Total | $ 116 | $ 110

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