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Loans - Credit Card Delinquency Status (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total | $ 323,598 | $ 327,775
Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 156,577 | 161,927
Revolving Loans Converted to Term | 612 | 581
Total | 157,189 | 162,508
Domestic credit card: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 149,750 | 155,088
Revolving Loans Converted to Term | 559 | 530
Total | 150,309 | 155,618
International card businesses: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 6,827 | 6,839
Revolving Loans Converted to Term | 53 | 51
Total | 6,880 | 6,890
Current | Domestic credit card: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 143,439 | 148,112
Revolving Loans Converted to Term | 481 | 453
Total | 143,920 | 148,565
Current | International card businesses: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 6,519 | 6,533
Revolving Loans Converted to Term | 40 | 37
Total | 6,559 | 6,570
30-59 days | Domestic credit card: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 1,773 | 1,944
Revolving Loans Converted to Term | 29 | 29
Total | 1,802 | 1,973
30-59 days | International card businesses: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 99 | 102
Revolving Loans Converted to Term | 5 | 5
Total | 104 | 107
60-89 days | Domestic credit card: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 1,343 | 1,483
Revolving Loans Converted to Term | 20 | 20
Total | 1,363 | 1,503
60-89 days | International card businesses: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 68 | 69
Revolving Loans Converted to Term | 3 | 3
Total | 71 | 72
Greater than 90 days | Domestic credit card: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 3,195 | 3,549
Revolving Loans Converted to Term | 29 | 28
Total | 3,224 | 3,577
Greater than 90 days | International card businesses: | Credit Card: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving Loans | 141 | 135
Revolving Loans Converted to Term | 5 | 6
Total | $ 146 | $ 141

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