Annual report pursuant to Section 13 and 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
Dec. 31, 2016
Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 906,683 $ 896,983
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 92,278 89,602
Credit card and other consumer | Credit Card Receivable | United States | Less than 620    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 4,431 4,196
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 12,364 11,857
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 34,828 34,270
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 40,655 39,279
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   $ 9,975
Loans and leases including disposal group $ 9,214  
Percentage outstanding, current or less than 30 days past due 98.00% 98.00%
Percentage outstanding, 30-89 days past due 1.00% 1.00%
Percentage outstanding, Equal to Greater than 90 days past due 1.00% 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   $ 0
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   0
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   0
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   0
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   9,975
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 94,089 88,795
Securities based lending overcollateralized 43,100 43,700
Loans no longer originated by corporation 499 567
Credit card and other consumer | Direct/Indirect Consumer | Less than 620    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 1,478 1,244
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 2,070 1,698
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 12,491 10,955
Credit card and other consumer | Direct/Indirect Consumer | Greater than or equal to 740    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 33,420 29,581
Credit card and other consumer | Direct/Indirect Consumer | Other internal credit metrics    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 44,630 45,317
Credit card and other consumer | Other consumer    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 2,499 $ 2,067
Percentage from exited businesses 19.00% 27.00%
Credit card and other consumer | Other consumer | Less than 620    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 187 $ 217
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 222 214
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 404 337
Credit card and other consumer | Other consumer | Greater than or equal to 740    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 1,525 1,149
Credit card and other consumer | Other consumer | Other internal credit metrics    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 161 $ 150