Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Commercial Loans - Impaired Loans (Details)

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Outstanding Loans and Leases - Commercial Loans - Impaired Loans (Details) - Commercial - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Financing Receivable, Impaired [Line Items]          
Real estate acquired through foreclosure $ 19   $ 19   $ 15
Commercial Real Estate          
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]          
With no recorded allowance 53   53   82
With an allowance recorded 289   289   328
Total 342   342   410
Impaired Financing Receivable, Recorded Investment [Abstract]          
With no recorded allowance 53   53   77
With an allowance recorded 102   102   107
Total 155   155   184
Related Allowance 11   11   11
Impaired Financing Receivable, Average Recorded Investment [Abstract]          
With no recorded allowance 65 $ 83 71 $ 77  
With an allowance recorded 96 232 100 282  
Total 161 315 171 359  
Impaired Financing Receivable, Interest Income, Accrual and Cash Basis Method [Abstract]          
With no recorded allowance 0 0 0 1  
With an allowance recorded 1 2 2 5  
Total 1 2 2 6  
Commercial Lease Financing          
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]          
With an allowance recorded 5   5   0
Total 5   5   0
Impaired Financing Receivable, Recorded Investment [Abstract]          
With an allowance recorded 3   3   0
Total 3   3   0
Related Allowance 0   0   0
Impaired Financing Receivable, Average Recorded Investment [Abstract]          
With an allowance recorded 1 0 1 0  
Total 1 0 1 0  
Impaired Financing Receivable, Interest Income, Accrual and Cash Basis Method [Abstract]          
With an allowance recorded 0 0 0 0  
Total 0 0 0 0  
Small Business Commercial          
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]          
With an allowance recorded 96   96   105
Total 96   96   105
Impaired Financing Receivable, Recorded Investment [Abstract]          
With an allowance recorded 84   84   101
Total 84   84   101
Related Allowance 29   29   35
Impaired Financing Receivable, Average Recorded Investment [Abstract]          
With an allowance recorded 92 108 97 114  
Total 92 108 97 114  
Impaired Financing Receivable, Interest Income, Accrual and Cash Basis Method [Abstract]          
With an allowance recorded 0 0 0 0  
Total 0 0 0 0  
United States          
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]          
With no recorded allowance 779   779   566
With an allowance recorded 2,147   2,147   1,350
Total 2,926   2,926   1,916
Impaired Financing Receivable, Recorded Investment [Abstract]          
With no recorded allowance 771   771   541
With an allowance recorded 1,731   1,731   1,157
Total 2,502   2,502   1,698
Related Allowance 167   167   115
Impaired Financing Receivable, Average Recorded Investment [Abstract]          
With no recorded allowance 656 710 619 669  
With an allowance recorded 1,646 904 1,544 862  
Total 2,302 1,614 2,163 1,531  
Impaired Financing Receivable, Interest Income, Accrual and Cash Basis Method [Abstract]          
With no recorded allowance 3 5 5 8  
With an allowance recorded 16 12 30 25  
Total 19 17 35 33  
Non United States          
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]          
With no recorded allowance 29   29   4
With an allowance recorded 493   493   531
Total 522   522   535
Impaired Financing Receivable, Recorded Investment [Abstract]          
With no recorded allowance 29   29   4
With an allowance recorded 329   329   381
Total 358   358   385
Related Allowance 31   31   $ 56
Impaired Financing Receivable, Average Recorded Investment [Abstract]          
With no recorded allowance 17 34 11 19  
With an allowance recorded 349 118 359 92  
Total 366 152 370 111  
Impaired Financing Receivable, Interest Income, Accrual and Cash Basis Method [Abstract]          
With no recorded allowance 0 1   1  
With an allowance recorded 3   6 1  
Total $ 3 $ 1 $ 6 $ 2