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Loans - Credit Card Delinquency Status (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total | $ 318,186 | $ 320,472
Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 153,373 | 154,091
Revolving Loans Converted to Term | 522 | 456
Total | 153,895 | 154,547
Domestic credit card: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 146,592 | 147,254
Revolving Loans Converted to Term | 473 | 412
Total | 147,065 | 147,666
International card businesses: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 6,781 | 6,837
Revolving Loans Converted to Term | 49 | 44
Total | 6,830 | 6,881
Current | Domestic credit card: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 140,576 | 140,521
Revolving Loans Converted to Term | 402 | 339
Total | 140,978 | 140,860
Current | International card businesses: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 6,470 | 6,521
Revolving Loans Converted to Term | 36 | 31
Total | 6,506 | 6,552
30-59 days | Domestic credit card: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 1,743 | 1,940
Revolving Loans Converted to Term | 27 | 28
Total | 1,770 | 1,968
30-59 days | International card businesses: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 109 | 112
Revolving Loans Converted to Term | 5 | 4
Total | 114 | 116
60-89 days | Domestic credit card: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 1,333 | 1,454
Revolving Loans Converted to Term | 17 | 17
Total | 1,350 | 1,471
60-89 days | International card businesses: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 66 | 72
Revolving Loans Converted to Term | 3 | 4
Total | 69 | 76
Greater than 90 days | Domestic credit card: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 2,940 | 3,339
Revolving Loans Converted to Term | 27 | 28
Total | 2,967 | 3,367
Greater than 90 days | International card businesses: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 136 | 132
Revolving Loans Converted to Term | 5 | 5
Total | $ 141 | $ 137

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