Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Credit Card and Other Consumer - Credit Quality Indicators (Details)

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Outstanding Loans and Leases - Credit Card and Other Consumer - Credit Quality Indicators (Details) - USD ($)
$ in Millions
Jun. 30, 2017
Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 916,666 $ 906,683
Loans and leases including disposal group   915,897
Credit card and other consumer | Credit Card Receivable | United States    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 90,776 92,278
Credit card and other consumer | Credit Card Receivable | United States | Less than 620    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 4,349 4,431
Credit card and other consumer | Credit Card Receivable | United States | Greater than or equal to 620 and less than 680    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 11,993 12,364
Credit card and other consumer | Credit Card Receivable | United States | Greater than or equal to 680 and less than 740    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 34,147 34,828
Credit card and other consumer | Credit Card Receivable | United States | Greater than or equal to 740    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 40,287 40,655
Credit card and other consumer | Credit Card Receivable | United States | Other internal credit metrics    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 0 0
Credit card and other consumer | Credit Card Receivable | Non United States    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases including disposal group   $ 9,214
Percentage outstanding, current or less than 30 days past due   98.00%
Percentage outstanding, current or less than 30 to 89 days past due   1.00%
Loans 90 days or more past due   1.00%
Credit card and other consumer | Credit Card Receivable | Non United States | Less than 620    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases including disposal group   $ 0
Credit card and other consumer | Credit Card Receivable | Non United States | Greater than or equal to 620 and less than 680    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases including disposal group   0
Credit card and other consumer | Credit Card Receivable | Non United States | Greater than or equal to 680 and less than 740    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases including disposal group   0
Credit card and other consumer | Credit Card Receivable | Non United States | Greater than or equal to 740    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases including disposal group   0
Credit card and other consumer | Credit Card Receivable | Non United States | Other internal credit metrics    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases including disposal group   9,214
Credit card and other consumer | Direct/Indirect Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 93,493 94,089
Securities based lending overcollateralized 42,800 43,100
Loans no longer originated by corporation 464 499
Credit card and other consumer | Direct/Indirect Consumer | Less than 620    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 1,550 1,478
Credit card and other consumer | Direct/Indirect Consumer | Greater than or equal to 620 and less than 680    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 2,038 2,070
Credit card and other consumer | Direct/Indirect Consumer | Greater than or equal to 680 and less than 740    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 12,257 12,491
Credit card and other consumer | Direct/Indirect Consumer | Greater than or equal to 740    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 33,764 33,420
Credit card and other consumer | Direct/Indirect Consumer | Other internal credit metrics    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 43,884 44,630
Credit card and other consumer | Other consumer    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 2,658 $ 2,499
Percentage from exited businesses 16.00% 19.00%
Credit card and other consumer | Other consumer | Less than 620    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 169 $ 187
Credit card and other consumer | Other consumer | Greater than or equal to 620 and less than 680    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 217 222
Credit card and other consumer | Other consumer | Greater than or equal to 680 and less than 740    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 425 404
Credit card and other consumer | Other consumer | Greater than or equal to 740    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 1,688 1,525
Credit card and other consumer | Other consumer | Other internal credit metrics    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 159 $ 161