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, 2018
Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 946,895 $ 936,749
Credit card and other consumer | Credit Card Receivable | United States    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 98,338 96,285
Credit card and other consumer | Credit Card Receivable | United States | Less than 620    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 5,016 4,730
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 12,415 12,422
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 35,781 35,656
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 45,126 43,477
Credit card and other consumer | Direct/Indirect Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 91,166 96,342
Securities based lending overcollateralized 39,900 42,800
Credit card and other consumer | Direct/Indirect Consumer | Less than 620    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 1,719 2,005
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 3,124 4,064
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 8,921 10,371
Credit card and other consumer | Direct/Indirect Consumer | Greater than or equal to 740    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 36,709 36,445
Credit card and other consumer | Direct/Indirect Consumer | Other internal credit metrics    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 40,693 43,457
Credit card and other consumer | Other consumer    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 202 166
Credit card and other consumer | Other consumer | Other internal credit metrics    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 202 $ 166