Annual report pursuant to Section 13 and 15(d)

Outstanding Loans and Leases - Nonperforming, Narrative (Details)

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Outstanding Loans and Leases - Nonperforming, Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
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 $ 946,895 $ 936,749  
Proceeds from sales of loans originally classified as held for investment and instruments from related securitization activities 21,365 11,996 $ 18,787
Purchased credit impaired loans sold 4,400 803  
90 Days or More Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 5,233 7,135  
Consumer Portfolio Segment      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 447,231 455,276  
Consumer Portfolio Segment | 90 Days or More Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases 4,513 6,564  
Consumer real estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Proceeds from sales of loans originally classified as held for investment and instruments from related securitization activities $ 11,600 4,000  
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 | 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 | Chapter Seven Bankruptcy      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases $ 858    
Nonperforming Financing Receivable | Junior Lien Home Equity Financing Receivable      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases $ 221 330  
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 $ 98    
Nonperforming loans discharged more than twelve months prior (greater than) 63.00%    
Nonperforming loans discharged more than twenty four months prior (greater than) 55.00%    
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, past due $ 70    
Nonperforming Financing Receivable | Consumer Portfolio Segment      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Proceeds from sales of loans originally classified as held for investment and instruments from related securitization activities 5,300 1,300  
Purchased credit impaired loans sold 4,400 $ 803  
Nonperforming Financing Receivable | Consumer real estate | Chapter Seven Bankruptcy      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans and leases $ 185