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 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Financing Receivable, Impaired [Line Items]          
Lending commitments $ 455   $ 455   $ 461
Real estate acquired through foreclosure 40   40   14
United States          
Unpaid Principal Balance          
With no recorded allowance 785   785   860
With an allowance recorded 1,550   1,550   2,018
Total 2,335   2,335   2,878
Carrying Value          
With no recorded allowance 777   777   827
With an allowance recorded 1,215   1,215   1,569
Total 1,992   1,992   2,396
Related Allowance 103   103   132
Average Carrying Value          
With no recorded allowance 857 $ 656 870 $ 619  
With an allowance recorded 1,264 1,646 1,376 1,544  
Total 2,121 2,302 2,246 2,163  
Interest Income Recognized          
With no recorded allowance 3 3 6 5  
With an allowance recorded 7 16 16 30  
Total 10 19 22 35  
Non United States          
Unpaid Principal Balance          
With no recorded allowance 0   0   130
With an allowance recorded 557   557   545
Total 557   557   675
Carrying Value          
With no recorded allowance 0   0   130
With an allowance recorded 476   476   432
Total 476   476   562
Related Allowance 96   96   104
Average Carrying Value          
With no recorded allowance 43 17 75 11  
With an allowance recorded 482 349 469 359  
Total 525 366 544 370  
Interest Income Recognized          
With no recorded allowance 0 0 0 0  
With an allowance recorded 3 3 6 6  
Total 3 3 6 6  
Commercial Real Estate          
Unpaid Principal Balance          
With no recorded allowance 53   53   77
With an allowance recorded 239   239   243
Total 292   292   320
Carrying Value          
With no recorded allowance 47   47   71
With an allowance recorded 115   115   96
Total 162   162   167
Related Allowance 13   13   10
Average Carrying Value          
With no recorded allowance 48 65 54 71  
With an allowance recorded 106 96 91 100  
Total 154 161 145 171  
Interest Income Recognized          
With no recorded allowance 0 0 0 0  
With an allowance recorded 1 1 2 2  
Total 1 1 2 2  
Commercial lease financing          
Unpaid Principal Balance          
With an allowance recorded 9   9   6
Total 9   9   6
Carrying Value          
With an allowance recorded 7   7   4
Total 7   7   4
Related Allowance 1   1   0
Average Carrying Value          
With an allowance recorded 4 1 4 1  
Total 4 1 4 1  
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 88   88   85
Total 88   88   85
Carrying Value          
With an allowance recorded 75   75   73
Total 75   75   73
Related Allowance 29   29   $ 27
Average Carrying Value          
With an allowance recorded 77 92 75 97  
Total 77 92 75 97  
Interest Income Recognized          
With an allowance recorded 0 0 0 0  
Total $ 0 $ 0 $ 0 $ 0