Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Nonperforming, Credit Quality (Details)

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Outstanding Loans and Leases - Nonperforming, Credit Quality (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases $ 6,378   $ 6,470
Accruing past due 90 days or more $ 4,044   4,415
Threshold period past due for nonperforming status of financing receivables 90 days 90 days  
Residential Mortgage      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Accruing past due 90 days or more $ 885   1,000
Consumer Portfolio Segment      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases 4,906   5,166
Accruing past due 90 days or more 3,849   4,170
Consumer real estate | Core Portfolio Residential Mortgage      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases 1,073   1,087
Accruing past due 90 days or more 385   417
Consumer real estate | Core Portfolio, Home Equity Financing Receivable      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases 1,118   1,079
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]      
Nonperforming loans and leases 1,189   1,389
Accruing past due 90 days or more 2,500   2,813
Consumer real estate | Non-core Portfolio, Home Equity Financing Receivable      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases 1,480   1,565
Accruing past due 90 days or more 0   0
Credit card and other consumer | Credit Card Receivable | United States      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Accruing past due 90 days or more 925   900
Credit card and other consumer | Direct/Indirect Consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases 46   46
Accruing past due 90 days or more 38   40
Credit card and other consumer | Other consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases 0   0
Accruing past due 90 days or more 1   0
Commercial Portfolio Segment      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases 1,472   1,304
Accruing past due 90 days or more $ 195   245
Threshold period past due for nonperforming status of financing receivables 90 days    
Commercial Portfolio Segment | United States      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases $ 1,059   814
Accruing past due 90 days or more 98   144
Commercial Portfolio Segment | Non United States      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases 255   299
Accruing past due 90 days or more 0   3
Commercial Portfolio Segment | Commercial Real Estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases 73   112
Accruing past due 90 days or more 13   4
Commercial Portfolio Segment | Commercial Lease Financing      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases 27   24
Accruing past due 90 days or more 8   19
Commercial Portfolio Segment | Small Business Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases 58   55
Accruing past due 90 days or more 76   75
Federal Housing Administration | Residential Mortgage      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Nonperforming loans and leases $ 2,000   $ 2,200