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Loans - Credit Card Delinquency Status (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total | $ 280,466 | $ 277,340
Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 113,589 | 114,361
Revolving loans converted to term | 373 | 411
Total | 113,962 | 114,772
Domestic credit card: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 107,663 | 108,364
Revolving loans converted to term | 324 | 359
Total | 107,987 | 108,723
International card businesses: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 5,926 | 5,997
Revolving loans converted to term | 49 | 52
Total | 5,975 | 6,049
Current | Domestic credit card: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 105,190 | 105,985
Revolving loans converted to term | 294 | 327
Total | 105,484 | 106,312
Current | International card businesses: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 5,718 | 5,795
Revolving loans converted to term | 38 | 41
Total | 5,756 | 5,836
30-59 days | Domestic credit card: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 742 | 760
Revolving loans converted to term | 12 | 13
Total | 754 | 773
30-59 days | International card businesses: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 71 | 73
Revolving loans converted to term | 4 | 4
Total | 75 | 77
60-89 days | Domestic credit card: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 550 | 519
Revolving loans converted to term | 8 | 9
Total | 558 | 528
60-89 days | International card businesses: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 47 | 47
Revolving loans converted to term | 3 | 3
Total | 50 | 50
Greater than 90 days | Domestic credit card: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 1,181 | 1,100
Revolving loans converted to term | 10 | 10
Total | 1,191 | 1,110
Greater than 90 days | International card businesses: | Credit Card |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Revolving loans | 90 | 82
Revolving loans converted to term | 4 | 4
Total | $ 94 | $ 86

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