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
Sep. 30, 2017
Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 927,117 $ 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 92,602 92,278
Credit card and other consumer | Credit Card Receivable | United States | Less than 620    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 4,612 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 12,195 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 34,796 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 40,999 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 93,391 94,089
Securities based lending overcollateralized 42,200 43,100
Loans no longer originated by corporation   499
Credit card and other consumer | Direct/Indirect Consumer | Less than 620    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 1,578 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 2,003 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 12,161 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 34,731 33,420
Credit card and other consumer | Direct/Indirect Consumer | Other internal credit metrics    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 42,918 44,630
Credit card and other consumer | Other consumer    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 2,424 $ 2,499
Percentage from exited businesses   19.00%
Credit card and other consumer | Other consumer | Less than 620    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 42 $ 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 125 222
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 364 404
Credit card and other consumer | Other consumer | Greater than or equal to 740    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 1,730 1,525
Credit card and other consumer | Other consumer | Other internal credit metrics    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 163 $ 161