Annual report pursuant to Section 13 and 15(d)

Outstanding Loans and Leases - Nonperforming (Details)

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Outstanding Loans and Leases - Nonperforming (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Threshold period past due for nonperforming status of financing receivables 90 days 90 days  
Loans and leases $ 936,749 $ 906,683  
Proceeds from sales 11,761 18,230 $ 22,316
Purchased credit impaired loans sold 803 549  
Recoveries of loans and leases previously charged off 1,640 1,627 1,767
Loans and leases charged off 5,619 5,448 6,105
Nonperforming loans and leases 6,470 7,707  
Accruing past due 90 days or more, including loans and leases held for sale 4,415 5,887  
Residential Mortgage      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Accruing past due 90 days or more 1,000 1,800  
Residential Mortgage | Federal Housing Administration      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases 2,200 3,000  
90 Days or More Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 7,135    
Consumer Portfolio Segment      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 455,276    
Nonperforming loans and leases 5,166 6,004  
Accruing past due 90 days or more, including loans and leases held for sale 4,170 5,679  
Consumer Portfolio Segment | 90 Days or More Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 6,564 8,727  
Consumer real estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Recoveries of loans and leases previously charged off 657 619 732
Loans and leases charged off $ 770 1,155 1,841
Consumer real estate | Junior Lien Home Equity Financing Receivable      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Threshold period past due for nonperforming status of financing receivables 90 days    
Consumer real estate | Core Portfolio, Residential Financing Receivable      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases $ 176,618 156,497  
Nonperforming loans and leases 1,087 1,274  
Accruing past due 90 days or more 417 486  
Consumer real estate | Core Portfolio, Home Equity Financing Receivable      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 44,245 49,373  
Nonperforming loans and leases 1,079 969  
Accruing past due 90 days or more 0 0  
Consumer real estate | Non-core Portfolio, Residential Financing Receivable      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 19,192 25,173  
Nonperforming loans and leases 1,389 1,782  
Accruing past due 90 days or more 2,813 4,307  
Consumer real estate | Non-core Portfolio, Home Equity Financing Receivable      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 10,783 13,459  
Nonperforming loans and leases 1,565 1,949  
Accruing past due 90 days or more $ 0 0  
Consumer real estate | Residential Mortgage      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Threshold period past due for nonperforming status of financing receivables 90 days    
Consumer real estate | 90 Days or More Past Due | Core Portfolio, Residential Financing Receivable      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases $ 1,040 1,213  
Consumer real estate | 90 Days or More Past Due | Core Portfolio, Home Equity Financing Receivable      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 473 451  
Consumer real estate | 90 Days or More Past Due | Non-core Portfolio, Residential Financing Receivable      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 3,535 5,343  
Consumer real estate | 90 Days or More Past Due | Non-core Portfolio, Home Equity Financing Receivable      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 572 832  
Consumer real estate | Chapter Seven Bankruptcy      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 1,200    
Credit card and other consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Recoveries of loans and leases previously charged off 809 770 813
Loans and leases charged off 3,774 3,553 3,620
Credit card and other consumer | Credit Card Receivable | United States      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 96,285 92,278  
Accruing past due 90 days or more 900 782  
Credit card and other consumer | Credit Card Receivable | Non United States      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Accruing past due 90 days or more, including loans and leases held for sale 0 66  
Credit card and other consumer | Direct/Indirect Consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 93,830 94,089  
Nonperforming loans and leases 46 28  
Accruing past due 90 days or more 40 34  
Credit card and other consumer | Other consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 2,678 2,499  
Nonperforming loans and leases 0 2  
Accruing past due 90 days or more 0 4  
Credit card and other consumer | 90 Days or More Past Due | Credit Card Receivable | United States      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 900 782  
Credit card and other consumer | 90 Days or More Past Due | Direct/Indirect Consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 43 34  
Credit card and other consumer | 90 Days or More Past Due | Other consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases $ 1 6  
Commercial Portfolio Segment      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Threshold period past due for nonperforming status of financing receivables 90 days    
Loans and leases $ 481,473 458,526  
Recoveries of loans and leases previously charged off 174 238 222
Loans and leases charged off 1,075 740 $ 644
Nonperforming loans and leases 1,304 1,703  
Accruing past due 90 days or more 245 208  
Commercial Portfolio Segment | United States      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 284,836 270,372  
Nonperforming loans and leases 814 1,256  
Accruing past due 90 days or more 144 106  
Commercial Portfolio Segment | Non United States      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 97,792 89,397  
Nonperforming loans and leases 299 279  
Accruing past due 90 days or more 3 5  
Commercial Portfolio Segment | Commercial Real Estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 58,298 57,355  
Nonperforming loans and leases 112 72  
Accruing past due 90 days or more 4 7  
Commercial Portfolio Segment | Commercial Real Estate | United States      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 54,800 54,300  
Commercial Portfolio Segment | Commercial Real Estate | Non United States      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 3,500 3,100  
Commercial Portfolio Segment | Commercial Lease Financing      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 22,116 22,375  
Nonperforming loans and leases 24 36  
Accruing past due 90 days or more 19 19  
Commercial Portfolio Segment | Small Business Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases 55 60  
Accruing past due 90 days or more 75 71  
Commercial Portfolio Segment | Small Business Commercial | United States      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 13,649 12,993  
Commercial Portfolio Segment | 90 Days or More Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 571 572  
Commercial Portfolio Segment | 90 Days or More Past Due | United States      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 425 400  
Commercial Portfolio Segment | 90 Days or More Past Due | Non United States      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 3 5  
Commercial Portfolio Segment | 90 Days or More Past Due | Commercial Real Estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 29 56  
Commercial Portfolio Segment | 90 Days or More Past Due | Commercial Lease Financing      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 26 27  
Commercial Portfolio Segment | 90 Days or More Past Due | Small Business Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 88 84  
Nonperforming Financing Receivable      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Transfer of nonperforming loans to held-for-sale 198 55  
Nonperforming Financing Receivable | Junior Lien Home Equity Financing Receivable      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases $ 330 428  
Nonperforming Financing Receivable | Chapter Seven Bankruptcy      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Threshold period past due for nonperforming status of financing receivables 90 days    
Non-performing troubled debt with no change in repayment terms at time of discharge, current with contractual payments $ 209    
Nonperforming loans discharged more than twelve months prior (greater than) 66.00%    
Nonperforming loans discharged more than twenty four months prior (greater than) 57.00%    
Nonperforming Financing Receivable | Chapter Seven Bankruptcy | 90 Days or More Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Non-performing troubled debt with no change in repayment terms at time of discharge, 90 days or more past due $ 124    
Nonperforming Financing Receivable | Consumer Portfolio Segment      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Proceeds from sales 1,300 2,200  
Purchased credit impaired loans sold 803 549  
Recoveries of loans and leases previously charged off 105    
Loans and leases charged off   30  
Gain (loss) on the sale of loans and leases receivable 57 $ 75  
Nonperforming Financing Receivable | Consumer real estate | Chapter Seven Bankruptcy      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases $ 358