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 Portfolio Segment - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Financing Receivable, Impaired [Line Items]          
Lending commitments $ 279   $ 279   $ 461
Real estate acquired through foreclosure 40   40   14
United States          
Unpaid Principal Balance          
With no recorded allowance 683   683   860
With an allowance recorded 1,466   1,466   2,018
Total 2,149   2,149   2,878
Carrying Value          
With no recorded allowance 675   675   827
With an allowance recorded 1,132   1,132   1,569
Total 1,807   1,807   2,396
Related Allowance 123   123   132
Average Carrying Value          
With no recorded allowance 726 $ 940 822 $ 726  
With an allowance recorded 1,166 1,624 1,305 1,570  
Total 1,892 2,564 2,127 2,296  
Interest Income Recognized          
With no recorded allowance 3 5 9 10  
With an allowance recorded 9 16 25 46  
Total 12 21 34 56  
Non United States          
Unpaid Principal Balance          
With no recorded allowance 44   44   130
With an allowance recorded 497   497   545
Total 541   541   675
Carrying Value          
With no recorded allowance 27   27   130
With an allowance recorded 437   437   432
Total 464   464   562
Related Allowance 67   67   104
Average Carrying Value          
With no recorded allowance 14 32 55 18  
With an allowance recorded 463 397 466 372  
Total 477 429 521 390  
Interest Income Recognized          
With no recorded allowance 0 0 0 0  
With an allowance recorded 3 5 9 11  
Total 3 5 9 11  
Commercial Real Estate          
Unpaid Principal Balance          
With no recorded allowance 117   117   77
With an allowance recorded 151   151   243
Total 268   268   320
Carrying Value          
With no recorded allowance 106   106   71
With an allowance recorded 39   39   96
Total 145   145   167
Related Allowance 13   13   10
Average Carrying Value          
With no recorded allowance 77 59 61 67  
With an allowance recorded 72 87 85 95  
Total 149 146 146 162  
Interest Income Recognized          
With no recorded allowance 1 0 1 0  
With an allowance recorded 0 1 2 3  
Total 1 1 3 3  
Commercial lease financing          
Unpaid Principal Balance          
With an allowance recorded 13   13   6
Total 13   13   6
Carrying Value          
With an allowance recorded 12   12   4
Total 12   12   4
Related Allowance 2   2   0
Average Carrying Value          
With an allowance recorded 10 4 6 2  
Total 10 4 6 2  
Interest Income Recognized          
With an allowance recorded   0 0 0  
Total 0 0 0 0  
Small Business Commercial          
Unpaid Principal Balance          
With an allowance recorded 82   82   85
Total 82   82   85
Carrying Value          
With an allowance recorded 70   70   73
Total 70   70   73
Related Allowance 27   27   $ 27
Average Carrying Value          
With an allowance recorded 72 81 74 91  
Total 72 81 74 91  
Interest Income Recognized          
With an allowance recorded 0 1 0 1  
Total $ 0 $ 1 $ 0 $ 1