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, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Financing Receivable, Impaired [Line Items]          
Lending commitments $ 256   $ 256   $ 205
Real estate acquired through foreclosure 30   30   52
United States          
Unpaid Principal Balance          
With no recorded allowance 697   697   576
With an allowance recorded 1,334   1,334   1,393
Total 2,031   2,031   1,969
Carrying Value          
With no recorded allowance 684   684   571
With an allowance recorded 1,073   1,073   1,109
Total 1,757   1,757   1,680
Related Allowance 115   115   98
Average Carrying Value          
With no recorded allowance 640 $ 726 659 $ 822  
With an allowance recorded 1,159 1,166 1,168 1,305  
Total 1,799 1,892 1,827 2,127  
Interest Income Recognized          
With no recorded allowance 4 3 12 9  
With an allowance recorded 11 9 32 25  
Total 15 12 44 34  
Non United States          
Unpaid Principal Balance          
With no recorded allowance 10   10   14
With an allowance recorded 233   233   528
Total 243   243   542
Carrying Value          
With no recorded allowance 10   10   11
With an allowance recorded 225   225   507
Total 235   235   518
Related Allowance 19   19   58
Average Carrying Value          
With no recorded allowance 9 14 35 55  
With an allowance recorded 287 463 381 466  
Total 296 477 416 521  
Interest Income Recognized          
With no recorded allowance 0 0 2 0  
With an allowance recorded 3 3 9 9  
Total 3 3 11 9  
Commercial Real Estate          
Unpaid Principal Balance          
With no recorded allowance 42   42   83
With an allowance recorded 104   104   133
Total 146   146   216
Carrying Value          
With no recorded allowance 32   32   80
With an allowance recorded 20   20   41
Total 52   52   121
Related Allowance 2   2   4
Average Carrying Value          
With no recorded allowance 68 77 72 61  
With an allowance recorded 10 72 19 85  
Total 78 149 91 146  
Interest Income Recognized          
With no recorded allowance 0 1 1 1  
With an allowance recorded 0 0 0 2  
Total 0 1 1 3  
Commercial lease financing          
Unpaid Principal Balance          
With no recorded allowance 2   2   0
With an allowance recorded 72   72   20
Total 74   74   20
Carrying Value          
With no recorded allowance 2   2   0
With an allowance recorded 72   72   18
Total 74   74   18
Related Allowance 0   0   3
Average Carrying Value          
With no recorded allowance 3 0 4 0  
With an allowance recorded 58 10 32 6  
Total 61 10 36 6  
Interest Income Recognized          
With no recorded allowance 0 0 0 0  
With an allowance recorded 1 0 1 0  
Total 1 0 1 0  
Small Business Commercial          
Unpaid Principal Balance          
With an allowance recorded 90   90   84
Total 90   90   84
Carrying Value          
With an allowance recorded 76   76   70
Total 76   76   70
Related Allowance 29   29   $ 27
Average Carrying Value          
With an allowance recorded 74 72 74 74  
Total 74 72 74 74  
Interest Income Recognized          
With an allowance recorded 0 0 0 0  
Total $ 0 $ 0 $ 0 $ 0