Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Commercial - Credit Quality Indicators (Details)

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Outstanding Loans and Leases - Commercial - Credit Quality Indicators (Details) - USD ($)
$ in Millions
Jun. 30, 2016
Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 903,153 $ 896,983
Loans and leases, measured at fair value 8,660 6,938
Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 451,266 440,814
Loans and leases, measured at fair value 6,816 5,067
Commercial | Commercial Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 57,612 57,199
Commercial | Commercial Lease Financing    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 21,203 21,352
Commercial | Pass rated | Commercial Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 57,170 56,688
Commercial | Pass rated | Commercial Lease Financing    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 20,371 20,644
Commercial | Reservable criticized | Commercial Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 442 511
Commercial | Reservable criticized | Commercial Lease Financing    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 832 708
Commercial | United States    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 263,467 252,771
Loans and leases, measured at fair value 2,700 2,300
Commercial | United States | Commercial Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 54,300 53,600
Commercial | United States | Small Business Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 13,120 12,876
Commercial | United States | Pass rated    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 252,353 243,922
Commercial | United States | Pass rated | Small Business Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 488 571
Commercial | United States | Reservable criticized    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 11,114 8,849
Commercial | United States | Reservable criticized | Small Business Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 83 $ 96
Commercial | United States | Internal Credit Metrics | Small Business Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Percentage outstanding, current or less than 30 days past due 99.00% 98.00%
Commercial | United States | Business Card and Small Business Loan | Refreshed FICO or Internal Credit Metric | Small Business Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 669 $ 670
Commercial | Non United States    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 89,048 91,549
Loans and leases, measured at fair value 4,100 2,800
Commercial | Non United States | Commercial Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 3,300 3,500
Commercial | Non United States | Pass rated    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 85,609 87,905
Commercial | Non United States | Reservable criticized    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 3,439 3,644
Commercial | Less than 620 | United States | Small Business Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 184 184
Commercial | Greater than or equal to 620 and less than 680 | United States | Small Business Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 561 543
Commercial | Greater than or equal to 680 and less than 740 | United States | Small Business Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 1,736 1,627
Commercial | Greater than or equal to 740 | United States | Small Business Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases 3,328 3,027
Commercial | Other internal credit metrics | United States | Small Business Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Loans and leases $ 6,740 $ 6,828