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Loans - Credit Card Delinquency Status (Detail) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019
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Loans and Leases Receivable Disclosure [Line Items] |  |
Total Loans | $ 251,512 | $ 265,809
Credit Card |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Revolving Loans | 106,465 |
Revolving Loans Converted to Term | 845 |
Total Loans | 107,310 | 128,236
Domestic credit card: | Credit Card |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Revolving Loans | 98,644 |
Revolving Loans Converted to Term | 746 |
Total Loans | 99,390 | 118,606
International card businesses: | Credit Card |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Revolving Loans | 7,821 |
Revolving Loans Converted to Term | 99 |
Total Loans | 7,920 | $ 9,630
Current | Domestic credit card: | Credit Card |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Revolving Loans | 96,000 |
Revolving Loans Converted to Term | 666 |
Total Loans | 96,666 |
Current | International card businesses: | Credit Card |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Revolving Loans | 7,625 |
Revolving Loans Converted to Term | 64 |
Total Loans | 7,689 |
30-59 days | Domestic credit card: | Credit Card |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Revolving Loans | 637 |
Revolving Loans Converted to Term | 31 |
Total Loans | 668 |
30-59 days | International card businesses: | Credit Card |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Revolving Loans | 66 |
Revolving Loans Converted to Term | 10 |
Total Loans | 76 |
60-89 days | Domestic credit card: | Credit Card |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Revolving Loans | 532 |
Revolving Loans Converted to Term | 22 |
Total Loans | 554 |
60-89 days | International card businesses: | Credit Card |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Revolving Loans | 43 |
Revolving Loans Converted to Term | 11 |
Total Loans | 54 |
Greater than 90 days | Domestic credit card: | Credit Card |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Revolving Loans | 1,475 |
Revolving Loans Converted to Term | 27 |
Total Loans | 1,502 |
Greater than 90 days | International card businesses: | Credit Card |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Revolving Loans | 87 |
Revolving Loans Converted to Term | 14 |
Total Loans | $ 101 |

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