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) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Commercial lease financing | United States      
Average Carrying Value      
With no recorded allowance $ 6 $ 0  
Interest Income Recognized      
With no recorded allowance 0 0  
Commercial Portfolio Segment      
Financing Receivable, Impaired [Line Items]      
Lending commitments 199   $ 205
Real estate acquired through foreclosure 52   52
Commercial Portfolio Segment | United States      
Unpaid Principal Balance      
With no recorded allowance 814   576
With an allowance recorded 1,448   1,393
Total 2,262   1,969
Carrying Value      
With no recorded allowance 772   571
With an allowance recorded 1,206   1,109
Total 1,978   1,680
Related Allowance 137   98
Average Carrying Value      
With no recorded allowance 672 882  
With an allowance recorded 1,105 1,487  
Total 1,777 2,369  
Interest Income Recognized      
With no recorded allowance 4 3  
With an allowance recorded 11 9  
Total 15 12  
Commercial Portfolio Segment | Non United States      
Unpaid Principal Balance      
With no recorded allowance 113   14
With an allowance recorded 394   528
Total 507   542
Carrying Value      
With no recorded allowance 113   11
With an allowance recorded 362   507
Total 475   518
Related Allowance 72   58
Average Carrying Value      
With no recorded allowance 62 108  
With an allowance recorded 445 453  
Total 507 561  
Interest Income Recognized      
With no recorded allowance 2 0  
With an allowance recorded 2 3  
Total 4 3  
Commercial Portfolio Segment | Commercial Real Estate      
Unpaid Principal Balance      
With no recorded allowance 62   83
With an allowance recorded 102   133
Total 164   216
Carrying Value      
With no recorded allowance 58   80
With an allowance recorded 18   41
Total 76   121
Related Allowance 2   4
Average Carrying Value      
With no recorded allowance 69 60  
With an allowance recorded 36 76  
Total 105 136  
Interest Income Recognized      
With no recorded allowance 0 0  
With an allowance recorded 0 1  
Total 0 1  
Commercial Portfolio Segment | Commercial lease financing      
Unpaid Principal Balance      
With no recorded allowance 11   0
With an allowance recorded 15   20
Total 26   20
Carrying Value      
With no recorded allowance 11   0
With an allowance recorded 4   18
Total 15   18
Related Allowance 0   3
Average Carrying Value      
With an allowance recorded 11 3  
Total 17 3  
Interest Income Recognized      
With an allowance recorded 0 0  
Total 0 0  
Commercial Portfolio Segment | Small Business Commercial      
Unpaid Principal Balance      
With an allowance recorded 87   84
Total 87   84
Carrying Value      
With an allowance recorded 74   70
Total 74   70
Related Allowance 29   $ 27
Average Carrying Value      
With an allowance recorded 75 74  
Total 75 74  
Interest Income Recognized      
With an allowance recorded 0 0  
Total $ 0 $ 0