Annual report pursuant to Section 13 and 15(d)

Allowance for Credit Losses - Allowance and Carrying Value by Portfolio Segment (Details)

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Allowance for Credit Losses - Allowance and Carrying Value by Portfolio Segment (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses $ 647 $ 608    
Carrying value $ 9,425 $ 11,555    
Allowance as a percentage of carrying value 6.86% 5.26%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 8,769 $ 8,993    
Carrying value $ 965,666 $ 930,991    
Allowance as a percentage of carrying value 0.91% 0.97%    
Total        
Allowance for loan and lease losses $ 9,416 $ 9,601 $ 10,393 $ 11,237
Carrying value $ 975,091 $ 942,546    
Allowance as a percentage of carrying value 0.97% 1.02%    
Loans and leases $ 983,426 $ 946,895    
Estimate of Fair Value Measurement        
Total        
Loans and leases 8,335 4,349    
Consumer real estate        
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses 139 258    
Carrying value $ 5,982 $ 8,556    
Allowance as a percentage of carrying value 2.32% 3.02%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 407 $ 670    
Carrying value $ 270,395 $ 248,287    
Allowance as a percentage of carrying value 0.15% 0.27%    
Total        
Allowance for loan and lease losses $ 546 $ 928 1,720 2,750
Carrying value $ 276,377 $ 256,843    
Allowance as a percentage of carrying value 0.20% 0.36%    
Consumer real estate | Estimate of Fair Value Measurement        
Total        
Loans and leases $ 594 $ 682    
Credit card and other consumer        
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses 188 154    
Carrying value $ 679 $ 566    
Allowance as a percentage of carrying value 27.69% 27.21%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 3,808 $ 3,720    
Carrying value $ 188,119 $ 189,140    
Allowance as a percentage of carrying value 2.02% 1.97%    
Total        
Allowance for loan and lease losses $ 3,996 $ 3,874 3,663 3,229
Carrying value $ 188,798 $ 189,706    
Allowance as a percentage of carrying value 2.12% 2.04%    
Commercial        
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses $ 320 $ 196    
Carrying value $ 2,764 $ 2,433    
Allowance as a percentage of carrying value 11.58% 8.06%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 4,554 $ 4,603    
Carrying value $ 507,152 $ 493,564    
Allowance as a percentage of carrying value 0.90% 0.93%    
Total        
Allowance for loan and lease losses $ 4,874 $ 4,799 $ 5,010 $ 5,258
Carrying value $ 509,916 $ 495,997    
Allowance as a percentage of carrying value 0.96% 0.97%    
Loans and leases $ 517,657 $ 499,664    
Commercial | Estimate of Fair Value Measurement        
Total        
Loans and leases $ 7,741 $ 3,667