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Loans - Credit Card Delinquency Status (Detail) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
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

X

- Definition

Amount of financing receivable that can be withdrawn, repaid and redrawn.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
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